This study investigates the supply conditions of college and university graduates in terms of total quantity and incremental quantity,analyzes the influencing factors of college and university enrollments,including re...This study investigates the supply conditions of college and university graduates in terms of total quantity and incremental quantity,analyzes the influencing factors of college and university enrollments,including regional population and GDP level,and finally,probes into the specialty construction situation of colleges and xiniversities in Liaoning Province,in order to further investigate the construction situation in each discipline,and thereby making an in-depth analysis of its development.展开更多
[Objectives]This study aimed to investigate the water extraction-alcohol precipitation technology and content determination method of polysaccharides in Rhizoma Polygonati.[Methods]Taking the content of polysaccharide...[Objectives]This study aimed to investigate the water extraction-alcohol precipitation technology and content determination method of polysaccharides in Rhizoma Polygonati.[Methods]Taking the content of polysaccharides in the extract as the indicator,the extraction process was optimized using single-factor tests and Box-Behnken Design.The content of polysaccharides extracted was determined by the anthrone-sulfuric acid method.Among the three factors in the test design,the solid/liquid ratio and extraction time had a significant effect(P<0.05,P<0.01),while the extraction temperature had no effect on the content of polysaccharides extracted(P>0.05).[Results]The optimal extraction process for polysaccharides in Rhizoma Polygonati was as follows:liquid/solid ratio 20∶1(mL/g),extraction time 2 h,and extraction temperature 85℃.Under the optimal extraction process,the content of polysaccharides in the extract reached 12.50%.[Conclusions]The extraction process optimized by response surface methodology for polysaccharides in Rhizoma Polygonati is reliable and has practical value,and can be used to guide production practices.展开更多
Sulfuric acid-phenol and sulfuric acid-anthrone methods were used to detect polysaccharide content in shoots of Aralia elata( Miq.) Seem.,and the conversion factor to glucose was measured with refined polysaccharides....Sulfuric acid-phenol and sulfuric acid-anthrone methods were used to detect polysaccharide content in shoots of Aralia elata( Miq.) Seem.,and the conversion factor to glucose was measured with refined polysaccharides. Comprehensive evaluation was carried out by linear relationship,precision,reproducibility,stability and recovery rate. The results showed that the linear relationship between glucose concentration and absorbance was good when glucose concentration was0-40 μg/ml,and the average recovery rate was equal to or higher than 97. 00% with good reproducibility( RSD < 1. 60%,n = 5). It revealed that the two methods were accurate and reliable,and suitable for the determination of polysaccharide content in the shoots of A. elata. Polysaccharide content detected by sulfuric acid-phenol and sulfuric acid-anthrone methods was 19. 31% and 20. 40% respectively.展开更多
Two copper-nickel complexes, {[Cu(i-Pr3TACN)][Ni(CN)4]}2·2H2O (1) and {[Cu(DACH)][Ni(CN)4]}n (2), have been synthesized by the self-assembly reactions of K2[Ni(CN)4] with CuCl2 and the corresponding chelating lig...Two copper-nickel complexes, {[Cu(i-Pr3TACN)][Ni(CN)4]}2·2H2O (1) and {[Cu(DACH)][Ni(CN)4]}n (2), have been synthesized by the self-assembly reactions of K2[Ni(CN)4] with CuCl2 and the corresponding chelating ligand 1,4,7-triisopropyl-1,4,7- triazacyclononane (i-Pr3TACN) or 1,4-diazacycloheptane (DACH), respectively. The complexes were structurally characterized by single-crystal X-ray diffraction, elemental analyses, IR spectra and magnetic properties. Complex 1 presents a [2+2] type of molecular square structure and 2 features a 2D β-pucker structure. The magnetic susceptibility measurements reveal a weak antiferromagnetic interaction between the Cu(Ⅱ) ions, with the J values of-22.11 and -32.50 cm-1 for 1 and 2. Moreover, by changing the size of macrocyclic ligands we have successfully constructed two different strictures, which may provide useful information for the construction of the structure.展开更多
[Objectives] To optimize the extraction process and determine the total triterpenoids from Semen Trichosanthis.[Methods]The Box-behnken response surface methodology was applied to optimize the extraction conditions of...[Objectives] To optimize the extraction process and determine the total triterpenoids from Semen Trichosanthis.[Methods]The Box-behnken response surface methodology was applied to optimize the extraction conditions of total triterpenoids in Semen Trichosanthis.And the spectrophotometry was used to determine the content of total triterpenoids in Semen Trichosanthis.[Results] The optimal extraction conditions were solid to liquid ratio of 40∶ 1,ultrasonic time of 20 min,and ultrasonic power of 100 W.Under these conditions,the content of total triterpenoids in Semen Trichosanthis was significantly different among the 10 production areas,among which the No.9 production area(Anhui 1) had the highest total triterpenoids content of 45.71 mg/g,while No.7 production area(Shandong) had the lowest total triterpenoids content of 15.22 mg/g.[Conclusions]The Box-behnken response surface methodology is reliable for the extraction of total triterpenoids in Semen Trichosanthis,and the spectrophotometry is proper for determining the content of total triterpenoids in Semen Trichosanthis.There are large differences in the content of total triterpenoids in Semen Trichosanthis produced in different areas.展开更多
The extraction technology of phenolic acid compounds from Salvia miltiorrhiza by ethanol reflux was studied. In this experiment, salvianolic acid B standard was used to make the standard curve. Single factor experimen...The extraction technology of phenolic acid compounds from Salvia miltiorrhiza by ethanol reflux was studied. In this experiment, salvianolic acid B standard was used to make the standard curve. Single factor experiment and orthogonal experiment were used to study the extraction of different ethanol concentrations, reflux times and material-to-liquid ratios. The OD value of salvianolic acid compounds was measured with a spectrophotometer. The extraction rate of phenolic acid compounds under different extraction conditions was calculated through a regression equation, so as to obtain the optimal conditions for the ethanol reflux extraction process of Salvia miltiorrhiza. The experimental data can provide a reference for the ethanol reflux extraction process of salvianolic acids in the industry. According to the experiment, the extraction rate of phenolic acids in Salvia miltiorrhiza was the highest when the ethanol concentration was 60%, the reflux time was 1.5 hours, and the ratio of material-to-liquid was 1:10.展开更多
[Objectives] This study was conducted to study the anti-gout effect of Phellodendron amurense and its different processed products. [Methods] Extracts of P. amurense and its different processed products were fed to ra...[Objectives] This study was conducted to study the anti-gout effect of Phellodendron amurense and its different processed products. [Methods] Extracts of P. amurense and its different processed products were fed to rats respectively,to observe uric acid and creatinine in the serum and swelling index. [Results] Compared with the data of positive control,P. amurense and the processed products could significantly reduce the high uric acid and creatinine in the serum,and also could resist the swelling in rats. [Conclusions] P. amurense and its processed products showed different degrees of anti-gout effect,and the processing methods were found to have no remarkable impact on this effect.展开更多
Along with the increasing demand for kindergarten teachers,as the cradle of talent training,the secondary vocational schools are required to reasonably formulate educational talent training plans according to the need...Along with the increasing demand for kindergarten teachers,as the cradle of talent training,the secondary vocational schools are required to reasonably formulate educational talent training plans according to the needs of social talents,optimize and adjust the teaching of preschool education courses,and improve the effectiveness of education and teaching.Referring to the teaching of the“Mandarin”course in preschool education,the secondary vocational schools need to achieve the following functions,namely,analyze the issues existing in the course teaching according to the results of teaching practice,and then explore the teaching improvement path of“Mandarin”course based on professional activity orientation in line with the“employment-oriented,service-oriented”career education goals,in order to improve the effectiveness of this teaching.展开更多
In order to understand IPv6 topology characteristics and dynamic behaviors deeply, and guide the design of IPv6 Internet structure, an Internet IP level topology evolution model (IP-TEM) based on power-law distributio...In order to understand IPv6 topology characteristics and dynamic behaviors deeply, and guide the design of IPv6 Internet structure, an Internet IP level topology evolution model (IP-TEM) based on power-law distribution was established. Selected the data of IPv6 IP-level topology from CAIDA Internet Global Research Institute in the year from 2012 to 2016 to analyze the evolution characteristics of IPv6 during the probing period, and then introduced to the characteristic outlier weight to locate the mutation time point to analyze the network topology mutation evolution, it is concluded that the evolution trend of other characteristics and the mutation points of each characteristic outlier weight are basically the same except for the average clustering coefficient. Then simulated the normal evolution and mutation evolution of the network respectively using IP-TEM, the simulation results show that IP-TEM can simulate the normal evolution and partial mutation evolution of the real network.展开更多
In this paper,by analyzing the design and control scheme of the mooring system based on theoretical mechanics,force analysis is conducted on the buoy,steel pipe,steel drum,and anchor chain,and a reasonable mathematica...In this paper,by analyzing the design and control scheme of the mooring system based on theoretical mechanics,force analysis is conducted on the buoy,steel pipe,steel drum,and anchor chain,and a reasonable mathematical model is constructed to solve the problems of the inclination angle of the steel drum and each section of the steel pipe,the shape of the anchor chain,the draft of the buoy,and the swimming area under different wind speeds,thus providing a reliable basis for the design of the system.展开更多
Tax cost is one of the costs of business activities,and tax planning has become an indispensable financial activity.How to carry out effective tax planning has been the focus of enterprises.Therefore,this paper intend...Tax cost is one of the costs of business activities,and tax planning has become an indispensable financial activity.How to carry out effective tax planning has been the focus of enterprises.Therefore,this paper intends to discuss how to carry out tax planning from the penetration point and techniques of tax planning,with an aim to provide reference for enterprises’tax planning activities.展开更多
[Objectives]This study was conducted to establish the method for simultaneous determination of six active components.[Methods]Simultaneous determination of chlorogenic acid,phellodendrine,magnoflorine,jatrorrhizine,pa...[Objectives]This study was conducted to establish the method for simultaneous determination of six active components.[Methods]Simultaneous determination of chlorogenic acid,phellodendrine,magnoflorine,jatrorrhizine,palmatine and berberine in Cortex Phellodendri was carried out by HPLC with a Diamonsil C18(4.6 mm×250 mm,5μm)column was used.The mobile phase was acetonitrile-water(1‰acetic acid,2 mmol ammonium acetate)solution in gradient elution.The detection wavelength was set at 280 nm,and the column temperature was kept at 25℃and the flow rate was 1 ml/min.[Results]The linear ranges of chlorogenic acid,phellodendrine,magnoflorine,jatrorrhizine,palmatine and berberine were 20.00-320.00,18.75-130.00,25.00-200.00,5.00-100.00,20.00-200.00,and 0.09-1.80 mg/L,respectively.The average recovery was 98.1%,99.4%,97.5%,97.3%,104.0%,and 98.5%,respectively;and the RSDs were 0.5%,0.6%,0.8%,1.0%,1.4%,and 0.9%,respectively.[Conclusions]The method is convenient,stable,reliable and suitable for quality control of Cortex Phellodendri.展开更多
A new prediction method based on the nonlinear autoregressive model is proposed to improve the accuracy of medium-term and long-term predictions of Satellite Clock Bias(SCB).Forecast experiments for three time periods...A new prediction method based on the nonlinear autoregressive model is proposed to improve the accuracy of medium-term and long-term predictions of Satellite Clock Bias(SCB).Forecast experiments for three time periods were implemented based on the precision SCB published on the International GNSS Server(IGS)server.The results show that the medium-term and long-term prediction accuracy of the proposed approach is significantly better compared to other traditional models,with the training time being much shorter than the wavelet neural network model.展开更多
[Objectives]This study was conducted to optimize the Formulation Process of glucosamine chondroitin sulfate tablets. [Methods] The orthogonal design with three levels was carried out with microcrystalline cellulose, c...[Objectives]This study was conducted to optimize the Formulation Process of glucosamine chondroitin sulfate tablets. [Methods] The orthogonal design with three levels was carried out with microcrystalline cellulose, calcium hydrophosphate and cross-linked polyvinylpyrrolidone as three factors to optimize the preparation process. [Results] When microcrystalline cellulose 200 mg/tablet, calcium hydrophosphate 150 mg/tablet, and cross-linked polyvinylpyrrolidone 80 mg/tablet were added, the angle of repose could meet the requirements of tablet pressing, and the dissolution could reach more than 95% in 30 min. The results of the orthogonal test showed that the dissolution effect of self-made tablets was faster than that of commercial products. [Conclusions] The glucosamine hydrochloride chondroitin sulfate tablets prepared by this prescription have better quality.展开更多
In recent years, with the support of national policies and the people’s demand for cultural life, a wave of red tourism has been in full swing throughout the country. The revolutionary martyrs opened up new heavens a...In recent years, with the support of national policies and the people’s demand for cultural life, a wave of red tourism has been in full swing throughout the country. The revolutionary martyrs opened up new heavens and earth with their flesh and blood, and the great spirit of the Red Revolution carried forward the precious material and spiritual wealth of our socialist country. As the successor of socialism in the new era, inheriting the great spirit of the Chinese revolution and praising the red culture are important tasks for our contemporary people. Therefore, in the development and construction of urban parks, the red cultural connotation of urban parks should be given, which plays a very important role in improving the quality of the city and enhancing the charm of the city.展开更多
At the present stage,in the field of education in China,universities are able to produce more high-quality talents for national construction.In the discipline of psychology,educators can effectively achieve the set te...At the present stage,in the field of education in China,universities are able to produce more high-quality talents for national construction.In the discipline of psychology,educators can effectively achieve the set teaching goals by using contemporary educational psychology.At present,influenced by traditional concepts and exam-oriented education,there are still more practical problems to be solved in the stage of psychology education in various higher education institutions in China.This paper briefly outlines the current situation of psychological education in colleges and universities,and analyzes the significance and means of applying contemporary educational psychology.展开更多
Young people are the flowers of the motherland, is the future of the motherland, youth teachers have great responsibilities. Integrate red culture into daily teaching activities, inherit and carry forward, enhance chi...Young people are the flowers of the motherland, is the future of the motherland, youth teachers have great responsibilities. Integrate red culture into daily teaching activities, inherit and carry forward, enhance children’s values, cultivate children’s excellent qualities such as patriotism and selfless dedication, improve children’s comprehensive quality, and let children grow up healthily. Taking red culture as the starting point, this paper discusses the strategy of integrating red cultural resources into patriotic education activities of teenagers, points out the existing problems in the current integration of red culture into patriotic education activities of teenagers and finds out the reasons;clarify the relevant concepts of red culture and patriotic education activities for young people;from the three aspects of integrating curriculum resources to enhance the significance of red culture education, creating a red environment to create a red education atmosphere, and digging deep into red cultural resources, this paper discusses the strategy of integrating red culture into patriotic education activities for young people, aiming to promote the organic combination of patriotic education activities and red culture for young people, and increase national and cultural self-confidence.展开更多
[Objectives]The effects of stabilizers such as sodium carboxymethyl cellulose,pectin,sodium alginate and xanthan gum on the stability of mango juice with skin were discussed using mango as the raw material.[Methods]Th...[Objectives]The effects of stabilizers such as sodium carboxymethyl cellulose,pectin,sodium alginate and xanthan gum on the stability of mango juice with skin were discussed using mango as the raw material.[Methods]The formula and stability of mango beverage with skin were studied using mango juice with skin as the raw material.Four stabilizers,including pectin,sodium alginate and sodium carboxymethyl cellulose,were added to improve the stability of the juice.Based on single factor experiments and a response surface experiment,the stability model of mango juice was established to determine the best compound stabilizer.[Results]According to an orthogonal experiment on the stability of mango juice with skin,the optimum technical parameters were as follows:sodium carboxymethyl cellulose 0.20%,xanthan gum 0.08%,sodium alginate 0.18%,and pectin 0.14%,with which the optimal suspension stability was 69.12%.The optimum technical parameters from the response surface experiment were as follows:sodium carboxymethyl cellulose 0.199%,pectin 0.1185%,sodium alginate 0.163%,and xanthan gum 0.077%,with which the suspension stability was 70.32%.It was found that the stability of mango juice with skin obtained by the response surface experiment was better than that by the orthogonal experiment,and the order of factors affecting the stability of mango was sodium alginate(C)>sodium carboxymethyl cellulose(A)>pectin(D)>xanthan gum(B).[Conclusions]The formula of compound stabilizer for mango juice was optimized by the orthogonal experiment and the response surface method,providing a theoretical basis for the actual production of mango juice with skin.展开更多
[Objective] This study aimed to optimize the ultrasonic extraction process of total flavonoids from Angelica keiskei Koidzumi. [Method] Using the yield of total flavonoids as an indicator,the ultrasonic extraction pro...[Objective] This study aimed to optimize the ultrasonic extraction process of total flavonoids from Angelica keiskei Koidzumi. [Method] Using the yield of total flavonoids as an indicator,the ultrasonic extraction process of total flavonoids from A. keiskei was optimized by orthogonal experimental design. [Result]Among four factors in orthogonal experimental design,extraction time exhibited the most significant effect on the extraction result; ethanol concentration exhibited a significant effect on the extraction result; ultrasonic power and solid-to-liquid ratio had no significant effect. The optimal conditions for ultrasonic extraction of total flavonoids from A. keiskei were extraction time of 25 min,ethanol concentration of 80%,ultrasonic power of 60 W,solid-to-liquid ratio of 1∶ 20( g/ml),under which the yield of total flavonoids reached 1. 56%. [Conclusion]This study provides the basis for further development and utilization of total flavonoids from A. keiskei.展开更多
[Objectives]The purpose of this study was to establish a method for the determination of five kinds of flavonoids in trichosanthes peel.[Methods]The contents of rutin,isoquercitrin,quercitrin,quercetin and kaempferol ...[Objectives]The purpose of this study was to establish a method for the determination of five kinds of flavonoids in trichosanthes peel.[Methods]The contents of rutin,isoquercitrin,quercitrin,quercetin and kaempferol in trichosanthes peel samples collected from different sites were determined by high-performance liquid chromatography.With each component as an index,principal component analysis and cluster analysis were performed.[Results]The contents of flavonoids in the trichosanthes peel samples from different sites were different.The cumulative variance contribution rate of isoquercitrin was 95.514%.The results of cluster analysis show that the quality of trichosanthes peel from Anhui was the best.[Conclusions]Taking isoquercitrin as a common factor to carry out content determination will help to better control the quality of trichosanthes peel.展开更多
基金Study on the Smooth Connection Between the Employment and the Industrial Demand for the Graduates from Universities in Liaoning,Investment Securities of the Demonstration Project of the Courses of Ideological and Political Education(Grant Number:202103018)launched by Liaoning Institute of Science and TechnologyTeaching Reform Program of Research and Practice on the Evaluation Standards of College and University Students' Academic Level(Grant Number:202101011)。
文摘This study investigates the supply conditions of college and university graduates in terms of total quantity and incremental quantity,analyzes the influencing factors of college and university enrollments,including regional population and GDP level,and finally,probes into the specialty construction situation of colleges and xiniversities in Liaoning Province,in order to further investigate the construction situation in each discipline,and thereby making an in-depth analysis of its development.
基金Innovation and Entrepreneurship Training Program for Undergraduates of Liaoning Institute of Science and Technology(202011430059)Research Project of Undergraduate Teaching Reform in General Higher Education in Liaoning Province 2018:High-quality Teaching Resource Construction and Sharing Project(247).
文摘[Objectives]This study aimed to investigate the water extraction-alcohol precipitation technology and content determination method of polysaccharides in Rhizoma Polygonati.[Methods]Taking the content of polysaccharides in the extract as the indicator,the extraction process was optimized using single-factor tests and Box-Behnken Design.The content of polysaccharides extracted was determined by the anthrone-sulfuric acid method.Among the three factors in the test design,the solid/liquid ratio and extraction time had a significant effect(P<0.05,P<0.01),while the extraction temperature had no effect on the content of polysaccharides extracted(P>0.05).[Results]The optimal extraction process for polysaccharides in Rhizoma Polygonati was as follows:liquid/solid ratio 20∶1(mL/g),extraction time 2 h,and extraction temperature 85℃.Under the optimal extraction process,the content of polysaccharides in the extract reached 12.50%.[Conclusions]The extraction process optimized by response surface methodology for polysaccharides in Rhizoma Polygonati is reliable and has practical value,and can be used to guide production practices.
基金Supported by Scientific Research Project of Education Department of Liaoning Province,China(L2017lkyfwdf-05)Public Welfare Fund Project of Department of Science and Technology of Liaoning Province,China(2016003003)
文摘Sulfuric acid-phenol and sulfuric acid-anthrone methods were used to detect polysaccharide content in shoots of Aralia elata( Miq.) Seem.,and the conversion factor to glucose was measured with refined polysaccharides. Comprehensive evaluation was carried out by linear relationship,precision,reproducibility,stability and recovery rate. The results showed that the linear relationship between glucose concentration and absorbance was good when glucose concentration was0-40 μg/ml,and the average recovery rate was equal to or higher than 97. 00% with good reproducibility( RSD < 1. 60%,n = 5). It revealed that the two methods were accurate and reliable,and suitable for the determination of polysaccharide content in the shoots of A. elata. Polysaccharide content detected by sulfuric acid-phenol and sulfuric acid-anthrone methods was 19. 31% and 20. 40% respectively.
文摘Two copper-nickel complexes, {[Cu(i-Pr3TACN)][Ni(CN)4]}2·2H2O (1) and {[Cu(DACH)][Ni(CN)4]}n (2), have been synthesized by the self-assembly reactions of K2[Ni(CN)4] with CuCl2 and the corresponding chelating ligand 1,4,7-triisopropyl-1,4,7- triazacyclononane (i-Pr3TACN) or 1,4-diazacycloheptane (DACH), respectively. The complexes were structurally characterized by single-crystal X-ray diffraction, elemental analyses, IR spectra and magnetic properties. Complex 1 presents a [2+2] type of molecular square structure and 2 features a 2D β-pucker structure. The magnetic susceptibility measurements reveal a weak antiferromagnetic interaction between the Cu(Ⅱ) ions, with the J values of-22.11 and -32.50 cm-1 for 1 and 2. Moreover, by changing the size of macrocyclic ligands we have successfully constructed two different strictures, which may provide useful information for the construction of the structure.
基金Supported by Project of Department of Education of Liaoning Province(L2017lkyfwdf-05)Natural Science Foundation Project of Department of Education of Liaoning Province(20180551223&2016003003)
文摘[Objectives] To optimize the extraction process and determine the total triterpenoids from Semen Trichosanthis.[Methods]The Box-behnken response surface methodology was applied to optimize the extraction conditions of total triterpenoids in Semen Trichosanthis.And the spectrophotometry was used to determine the content of total triterpenoids in Semen Trichosanthis.[Results] The optimal extraction conditions were solid to liquid ratio of 40∶ 1,ultrasonic time of 20 min,and ultrasonic power of 100 W.Under these conditions,the content of total triterpenoids in Semen Trichosanthis was significantly different among the 10 production areas,among which the No.9 production area(Anhui 1) had the highest total triterpenoids content of 45.71 mg/g,while No.7 production area(Shandong) had the lowest total triterpenoids content of 15.22 mg/g.[Conclusions]The Box-behnken response surface methodology is reliable for the extraction of total triterpenoids in Semen Trichosanthis,and the spectrophotometry is proper for determining the content of total triterpenoids in Semen Trichosanthis.There are large differences in the content of total triterpenoids in Semen Trichosanthis produced in different areas.
文摘The extraction technology of phenolic acid compounds from Salvia miltiorrhiza by ethanol reflux was studied. In this experiment, salvianolic acid B standard was used to make the standard curve. Single factor experiment and orthogonal experiment were used to study the extraction of different ethanol concentrations, reflux times and material-to-liquid ratios. The OD value of salvianolic acid compounds was measured with a spectrophotometer. The extraction rate of phenolic acid compounds under different extraction conditions was calculated through a regression equation, so as to obtain the optimal conditions for the ethanol reflux extraction process of Salvia miltiorrhiza. The experimental data can provide a reference for the ethanol reflux extraction process of salvianolic acids in the industry. According to the experiment, the extraction rate of phenolic acids in Salvia miltiorrhiza was the highest when the ethanol concentration was 60%, the reflux time was 1.5 hours, and the ratio of material-to-liquid was 1:10.
基金Supported by Youth and Guidance Fund of Liaoning Institute of Science and Technology(Yd201605)
文摘[Objectives] This study was conducted to study the anti-gout effect of Phellodendron amurense and its different processed products. [Methods] Extracts of P. amurense and its different processed products were fed to rats respectively,to observe uric acid and creatinine in the serum and swelling index. [Results] Compared with the data of positive control,P. amurense and the processed products could significantly reduce the high uric acid and creatinine in the serum,and also could resist the swelling in rats. [Conclusions] P. amurense and its processed products showed different degrees of anti-gout effect,and the processing methods were found to have no remarkable impact on this effect.
文摘Along with the increasing demand for kindergarten teachers,as the cradle of talent training,the secondary vocational schools are required to reasonably formulate educational talent training plans according to the needs of social talents,optimize and adjust the teaching of preschool education courses,and improve the effectiveness of education and teaching.Referring to the teaching of the“Mandarin”course in preschool education,the secondary vocational schools need to achieve the following functions,namely,analyze the issues existing in the course teaching according to the results of teaching practice,and then explore the teaching improvement path of“Mandarin”course based on professional activity orientation in line with the“employment-oriented,service-oriented”career education goals,in order to improve the effectiveness of this teaching.
文摘In order to understand IPv6 topology characteristics and dynamic behaviors deeply, and guide the design of IPv6 Internet structure, an Internet IP level topology evolution model (IP-TEM) based on power-law distribution was established. Selected the data of IPv6 IP-level topology from CAIDA Internet Global Research Institute in the year from 2012 to 2016 to analyze the evolution characteristics of IPv6 during the probing period, and then introduced to the characteristic outlier weight to locate the mutation time point to analyze the network topology mutation evolution, it is concluded that the evolution trend of other characteristics and the mutation points of each characteristic outlier weight are basically the same except for the average clustering coefficient. Then simulated the normal evolution and mutation evolution of the network respectively using IP-TEM, the simulation results show that IP-TEM can simulate the normal evolution and partial mutation evolution of the real network.
基金The Undergraduate Teaching Reform Research Project of Liaoning Institute of Science and Technology in 2021"Research and Practice on the Construction of‘Dual Teachers and Dual Energy’Teachers in Applied Undergraduate Universities"(Grant Number:2021053)。
文摘In this paper,by analyzing the design and control scheme of the mooring system based on theoretical mechanics,force analysis is conducted on the buoy,steel pipe,steel drum,and anchor chain,and a reasonable mathematical model is constructed to solve the problems of the inclination angle of the steel drum and each section of the steel pipe,the shape of the anchor chain,the draft of the buoy,and the swimming area under different wind speeds,thus providing a reliable basis for the design of the system.
基金2021 Curriculum Ideological and Political Demonstration Curriculum Construction Subjects(Tax Law)of Liaoning Institute of Science and Technology(The Second Batch)(Number:202103022)。
文摘Tax cost is one of the costs of business activities,and tax planning has become an indispensable financial activity.How to carry out effective tax planning has been the focus of enterprises.Therefore,this paper intends to discuss how to carry out tax planning from the penetration point and techniques of tax planning,with an aim to provide reference for enterprises’tax planning activities.
文摘[Objectives]This study was conducted to establish the method for simultaneous determination of six active components.[Methods]Simultaneous determination of chlorogenic acid,phellodendrine,magnoflorine,jatrorrhizine,palmatine and berberine in Cortex Phellodendri was carried out by HPLC with a Diamonsil C18(4.6 mm×250 mm,5μm)column was used.The mobile phase was acetonitrile-water(1‰acetic acid,2 mmol ammonium acetate)solution in gradient elution.The detection wavelength was set at 280 nm,and the column temperature was kept at 25℃and the flow rate was 1 ml/min.[Results]The linear ranges of chlorogenic acid,phellodendrine,magnoflorine,jatrorrhizine,palmatine and berberine were 20.00-320.00,18.75-130.00,25.00-200.00,5.00-100.00,20.00-200.00,and 0.09-1.80 mg/L,respectively.The average recovery was 98.1%,99.4%,97.5%,97.3%,104.0%,and 98.5%,respectively;and the RSDs were 0.5%,0.6%,0.8%,1.0%,1.4%,and 0.9%,respectively.[Conclusions]The method is convenient,stable,reliable and suitable for quality control of Cortex Phellodendri.
基金2022 Basic Scientific Research Project supported by Liaoning Provincial Education Department(No.LJKMZ20221686)。
文摘A new prediction method based on the nonlinear autoregressive model is proposed to improve the accuracy of medium-term and long-term predictions of Satellite Clock Bias(SCB).Forecast experiments for three time periods were implemented based on the precision SCB published on the International GNSS Server(IGS)server.The results show that the medium-term and long-term prediction accuracy of the proposed approach is significantly better compared to other traditional models,with the training time being much shorter than the wavelet neural network model.
基金Supported by School-level High-level Talent Project (XGY2021A022)Doctoral Research Startup Fund of Department of Science&Technology of Liaoning Province (2021-BS-252)。
文摘[Objectives]This study was conducted to optimize the Formulation Process of glucosamine chondroitin sulfate tablets. [Methods] The orthogonal design with three levels was carried out with microcrystalline cellulose, calcium hydrophosphate and cross-linked polyvinylpyrrolidone as three factors to optimize the preparation process. [Results] When microcrystalline cellulose 200 mg/tablet, calcium hydrophosphate 150 mg/tablet, and cross-linked polyvinylpyrrolidone 80 mg/tablet were added, the angle of repose could meet the requirements of tablet pressing, and the dissolution could reach more than 95% in 30 min. The results of the orthogonal test showed that the dissolution effect of self-made tablets was faster than that of commercial products. [Conclusions] The glucosamine hydrochloride chondroitin sulfate tablets prepared by this prescription have better quality.
文摘In recent years, with the support of national policies and the people’s demand for cultural life, a wave of red tourism has been in full swing throughout the country. The revolutionary martyrs opened up new heavens and earth with their flesh and blood, and the great spirit of the Red Revolution carried forward the precious material and spiritual wealth of our socialist country. As the successor of socialism in the new era, inheriting the great spirit of the Chinese revolution and praising the red culture are important tasks for our contemporary people. Therefore, in the development and construction of urban parks, the red cultural connotation of urban parks should be given, which plays a very important role in improving the quality of the city and enhancing the charm of the city.
文摘At the present stage,in the field of education in China,universities are able to produce more high-quality talents for national construction.In the discipline of psychology,educators can effectively achieve the set teaching goals by using contemporary educational psychology.At present,influenced by traditional concepts and exam-oriented education,there are still more practical problems to be solved in the stage of psychology education in various higher education institutions in China.This paper briefly outlines the current situation of psychological education in colleges and universities,and analyzes the significance and means of applying contemporary educational psychology.
文摘Young people are the flowers of the motherland, is the future of the motherland, youth teachers have great responsibilities. Integrate red culture into daily teaching activities, inherit and carry forward, enhance children’s values, cultivate children’s excellent qualities such as patriotism and selfless dedication, improve children’s comprehensive quality, and let children grow up healthily. Taking red culture as the starting point, this paper discusses the strategy of integrating red cultural resources into patriotic education activities of teenagers, points out the existing problems in the current integration of red culture into patriotic education activities of teenagers and finds out the reasons;clarify the relevant concepts of red culture and patriotic education activities for young people;from the three aspects of integrating curriculum resources to enhance the significance of red culture education, creating a red environment to create a red education atmosphere, and digging deep into red cultural resources, this paper discusses the strategy of integrating red culture into patriotic education activities for young people, aiming to promote the organic combination of patriotic education activities and red culture for young people, and increase national and cultural self-confidence.
基金Supported by Doctoral Research Start-up Fund of Department of Science&Technology of Liaoning Province (2021-BS-250)Doctoral Research Start-up Fund of Liaoning Institute of Science and Technology (2307B16)College Students Innovation and Entrepreneurship Training Program of Liaoning Institute of Science and Technology (202311430048).
文摘[Objectives]The effects of stabilizers such as sodium carboxymethyl cellulose,pectin,sodium alginate and xanthan gum on the stability of mango juice with skin were discussed using mango as the raw material.[Methods]The formula and stability of mango beverage with skin were studied using mango juice with skin as the raw material.Four stabilizers,including pectin,sodium alginate and sodium carboxymethyl cellulose,were added to improve the stability of the juice.Based on single factor experiments and a response surface experiment,the stability model of mango juice was established to determine the best compound stabilizer.[Results]According to an orthogonal experiment on the stability of mango juice with skin,the optimum technical parameters were as follows:sodium carboxymethyl cellulose 0.20%,xanthan gum 0.08%,sodium alginate 0.18%,and pectin 0.14%,with which the optimal suspension stability was 69.12%.The optimum technical parameters from the response surface experiment were as follows:sodium carboxymethyl cellulose 0.199%,pectin 0.1185%,sodium alginate 0.163%,and xanthan gum 0.077%,with which the suspension stability was 70.32%.It was found that the stability of mango juice with skin obtained by the response surface experiment was better than that by the orthogonal experiment,and the order of factors affecting the stability of mango was sodium alginate(C)>sodium carboxymethyl cellulose(A)>pectin(D)>xanthan gum(B).[Conclusions]The formula of compound stabilizer for mango juice was optimized by the orthogonal experiment and the response surface method,providing a theoretical basis for the actual production of mango juice with skin.
基金Supported by Scientific Research Project of Liaoning Provincial Department of Education(L2014502)Innovation and Entrepreneurship Training Program for Undergraduates in Liaoning Institute of Science and Technology(201511430069)
文摘[Objective] This study aimed to optimize the ultrasonic extraction process of total flavonoids from Angelica keiskei Koidzumi. [Method] Using the yield of total flavonoids as an indicator,the ultrasonic extraction process of total flavonoids from A. keiskei was optimized by orthogonal experimental design. [Result]Among four factors in orthogonal experimental design,extraction time exhibited the most significant effect on the extraction result; ethanol concentration exhibited a significant effect on the extraction result; ultrasonic power and solid-to-liquid ratio had no significant effect. The optimal conditions for ultrasonic extraction of total flavonoids from A. keiskei were extraction time of 25 min,ethanol concentration of 80%,ultrasonic power of 60 W,solid-to-liquid ratio of 1∶ 20( g/ml),under which the yield of total flavonoids reached 1. 56%. [Conclusion]This study provides the basis for further development and utilization of total flavonoids from A. keiskei.
基金College Students'Innovation and Entrepreneurship Training Program of Liaoning Province(201911430039).
文摘[Objectives]The purpose of this study was to establish a method for the determination of five kinds of flavonoids in trichosanthes peel.[Methods]The contents of rutin,isoquercitrin,quercitrin,quercetin and kaempferol in trichosanthes peel samples collected from different sites were determined by high-performance liquid chromatography.With each component as an index,principal component analysis and cluster analysis were performed.[Results]The contents of flavonoids in the trichosanthes peel samples from different sites were different.The cumulative variance contribution rate of isoquercitrin was 95.514%.The results of cluster analysis show that the quality of trichosanthes peel from Anhui was the best.[Conclusions]Taking isoquercitrin as a common factor to carry out content determination will help to better control the quality of trichosanthes peel.
