Graphene aerogel was synthesized and used for the removal of methyl blue from aqueous solutions.The effect of solution pH,temperature and adsorption time on the adsorption performance of the graphene aerogel was studi...Graphene aerogel was synthesized and used for the removal of methyl blue from aqueous solutions.The effect of solution pH,temperature and adsorption time on the adsorption performance of the graphene aerogel was studied systematically.In addition,investigations were also performed to determine the nature of adsorption.The experimental results show that graphene aerogel is a highly efficient adsorbent for the treatment of methyl blue in aqueous solutions.In addition,the adsorption of methyl blue proceeds through a single layer physical adsorption on the graphene aerogel.The findings herein are useful for the future development of adsorbent for in water.展开更多
In this work,we have prepared the hierarchically nanostructured core–shell NiCo layered double hydroxide(NiCo-LDH)nanosheets-and ZnFe_(2)O_(4) nanocubes-decorated polyacrylonitrile(PAN)/pitch-based carbon nanofibers(...In this work,we have prepared the hierarchically nanostructured core–shell NiCo layered double hydroxide(NiCo-LDH)nanosheets-and ZnFe_(2)O_(4) nanocubes-decorated polyacrylonitrile(PAN)/pitch-based carbon nanofibers(PPCNs)webs(NiCo-LDH@PPCNs as cathode and ZnFe_(2)O_(4)@PPCNs as anode materials)with the bonded network structure by a facile and scalable hydrothemal method.Herein,the low-cost pitch with lower softening point(~90℃)as co-precursor was utilized to produce the PAN/pitch-based carbon nanofibers(PPCNs)with enhanced electrical conductivity.The obtained PPCNs with pitch content of 30%(PP30CNs)electrode material delivered higher specific capacitance(~67 F g^(-1))than that(~48 F g^(-1))of the PAN-based carbon nanofibers(PCNs)at 1 A g^(-1),due to the increased electrical conductivity and lower interfacial charge transfer resistance(RCT)of~0.16 U.Further,the NiCo-LDH-decorated PP30CNs(NiCoLDH@PP30CNs)as cathode material showed superior specific capacitance of 1162 F g^(-1) at 1.0 A g^(-1) and ultra-high retention rate of 91.56%at 10 A g^(-1).The ZnFe_(2)O_(4)@PP30CNs as anode material also showed higher specific capacitance of 282 F g^(-1) at 1 A g^(-1) and good rate capability with capacitance retention of 56.73%at 10 A g^(-1).The as-fabricated asymmetric NiCo-LDH@PP30CNs//ZnFe_(2)O_(4)@PP30CNs hybrid supercapacitor device delivered a specific capacitance of~98 F g^(-1) at 1 A g^(-1) and excellent capacitance retention of~88%after 5000 charge–discharge cycles.展开更多
In this paper, we conduct research on the post-90s patriotism education under the general background of globalization. Patriotism refl ected the people’s deep feelings about their motherland, refl ects the personal t...In this paper, we conduct research on the post-90s patriotism education under the general background of globalization. Patriotism refl ected the people’s deep feelings about their motherland, refl ects the personal to the dependence of the motherland, it is people for their homeland, racial and the cultural sense of belonging, identity, dignity and honor. It is a moral requirement of regulating the relationship between individuals and the motherland, the principle of political and legal norms, also is the core of the national spirit. Love the motherland’s great rivers as love oneself of the same fl esh and blood, love, brilliant culture of the basic motherland that love his own country constitutes the basic requirements of patriotism. Under this background, we propose our novel perspectives on post-90s patriotism education under the general background of globalization which is meaningful.展开更多
In this paper, we conduct research on the current condition and countermeasures of private colleges and universities student physique health test under background of sunshine sports. For the further reform of basic ed...In this paper, we conduct research on the current condition and countermeasures of private colleges and universities student physique health test under background of sunshine sports. For the further reform of basic education thought and education idea, strengthen quality education, widening specialty caliber, and promote the reform of the teaching and scientific research combined, gradually establish a notice to strengthen quality education, integrating imparting knowledge, cultivating basic ability, improve quality, develop base solid foundation, wide knowledge and strong ability and high quality specialized talented person as has the characteristics of era of diversified and comprehensive compound talents training mode and our country higher professional sports curriculum framework should be organized by the teachers, teaching conditions, teaching management, assessment, teaching reform, the teaching effect on conception to form a multi-level, multi-factor curriculum system. With this guidance, we propose the enhanced student physique health test paradigm for the private colleges and universities student that will be innovative.展开更多
In this context, in order to explore the College Basketball Teaching innovation, combined with the use of literature in college basketball teaching practice, we analyzed the Basketball Teaching, College Basketball pro...In this context, in order to explore the College Basketball Teaching innovation, combined with the use of literature in college basketball teaching practice, we analyzed the Basketball Teaching, College Basketball proposed teaching content, teaching methods and new ideas evaluated. As the reform of college sports, sports has not only as a sports course, the new curriculum reform to give it a new mission, physical education began to advocate health education and lifelong education. Basketball is one of the most popular college sports curriculum in sports, how college basketball curriculum reform to adapt to the new curriculum requirements, teaching curriculum of college basketball has an important significance. This paper analyzes the college basketball stage teaching problems and solves these problems made comments to promote the curriculum reform of college basketball. We discussed the current situation and problems of college basketball teaching objectives, content, forms, methods, evaluation, etc., in order to promote the deepening of reform of basketball teaching, training students basketball comprehensive ability. And autonomy are all specific requirements of quality education curriculum reform of college basketball raised. College Basketball Teaching should abandon the traditional teaching mode, the establishment of “health first” guiding ideology of teaching in the process of transformation of common objects curriculum teachers, student body double, so that both the interest and technology have both, to impart knowledge, capacity and improve the quality of integration in sports reflects the multifunctional and further highlight its enhanced physical basis, so as to achieve fitness sport education to educational change, and ultimately self-training students to choose basketball and consequent lifetime.展开更多
To improve students＇ listening and speaking ability and cultivate thinking habit of speaking is the focus of English teaching. And CLT is the best choice to solve this problem. CLT focus on improving students＇ commu...To improve students＇ listening and speaking ability and cultivate thinking habit of speaking is the focus of English teaching. And CLT is the best choice to solve this problem. CLT focus on improving students＇ communicative competence through creating harmonious teaching environment, establishing fruitful teacher-student relationship and organizing effective classroom activities. Through the experiment done in the an independent college oral English class, this thesis tries to prove CLT is effective for improving independent college students＇ communicative competence by tests, questionnaire and interview to seventy non-English freshmen of our college by means of qualitative and quantitative methods. Besides, this thesis provides the teaching model of CLT. Through the painstaking organization of classroom teaching, students can experience the real communicative environment and can cultivate the ability of using language.展开更多
Manganese dioxide(MnO_(2)), a commonly find oxidant in both natural environment and industrial application, plays a crucial role for various organic compound degradation. Tuning the MnO_(2) crystal structure is a cost...Manganese dioxide(MnO_(2)), a commonly find oxidant in both natural environment and industrial application, plays a crucial role for various organic compound degradation. Tuning the MnO_(2) crystal structure is a cost-effective strategy to boost the oxidation reactions, where the challenge remains due to lacking indepth investigation of the crystal properties. Herein, MnO_(2) with different crystalline structures(x-MnO_(2))including α-, β-and δ-was prepared through the hydrothermal synthesis for a typical organic pollutant removal. The structural and degradation analysis indicated that the oxidation capacity was originated from Mn^(3+) and oxygen vacancies(OVs). The intrinsic relationships between oxidation performance and other physiochemical properties such as morphology and electrochemistry were thoroughly discussed,and positive correlations between oxidation capacity and electrochemical properties were found which eventually led to excellent oxidation performance via modulating the above-mentioned properties. Moreover, the K^(+) content was determined to be the most crucial role in manipulating the structure properties.This work offers a crystal-level insight into the relationship between the crystal structure and oxidative property, promoting rational design of highly efficient oxidant.展开更多
γ-A12O3-supported CeO2 catalysts were pre- pared by microemulsion and impregnation methods and characterized by X-ray diffraction （XRD） and scanning electron microscope （SEM） techniques. At the same time, the des...γ-A12O3-supported CeO2 catalysts were pre- pared by microemulsion and impregnation methods and characterized by X-ray diffraction （XRD） and scanning electron microscope （SEM） techniques. At the same time, the desulfurization activity of catalysts was investigated. The results show that nanoscale active substances and a high desulfurization effect are achieved by microemulsion, exhibiting a significant dominance compared with traditional impregnation method. The optimal preparation condition is temperature of 30 ℃ and ratio of [H20]/[surface active agent] of 7 with slow demulsification. The activated catalysts still keep high and stable desulfurization activity during a wide temperature range of 450-600 ℃. Among a series of prepared catalysts, the desulfurization rate of 6CeOz/γ-A1203 is the highest, reaching up to 80 % when temperature is higher than 550℃. The catalytic reduction mechanism of SO2 over nano-CeOz/γ-A1203 follows redox mechanism.展开更多
Level set method has been extensively used for image segmentation,which is a key technology of water extraction.However,one of the problems of the level-set method is how to find the appropriate initial surface parame...Level set method has been extensively used for image segmentation,which is a key technology of water extraction.However,one of the problems of the level-set method is how to find the appropriate initial surface parameters,which will affect the accuracy and speed of level set evolution.Recently,the semantic segmentation based on deep learning has opened the exciting research possibilities.In addition,the Convolutional Neural Network(CNN)has shown a strong feature representation capability.Therefore,in this paper,the CNN method is used to obtain the initial SAR image segmentation map to provide deep a priori information for the zero-level set curve,which only needs to describe the general outline of the water body,rather than the accurate edges.Compared with the traditional circular and rectangular zero-level set initialization method,this method can converge to the edge of the water body faster and more precisely;it will not fall into the local minimum value and be able to obtain accurate segmentation results.The effectiveness of the proposed method is demonstrated by the experimental results of flood disaster monitoring in South China in 2020.展开更多
基金Funded by the Natural Science Foundation of Hubei Province(2018CFB785)。
文摘Graphene aerogel was synthesized and used for the removal of methyl blue from aqueous solutions.The effect of solution pH,temperature and adsorption time on the adsorption performance of the graphene aerogel was studied systematically.In addition,investigations were also performed to determine the nature of adsorption.The experimental results show that graphene aerogel is a highly efficient adsorbent for the treatment of methyl blue in aqueous solutions.In addition,the adsorption of methyl blue proceeds through a single layer physical adsorption on the graphene aerogel.The findings herein are useful for the future development of adsorbent for in water.
基金supported by the National Research Foundation of Korea grant funded by the Korea government(MSIT)(No.2020R1A2C2012356)the National Research Foundation of Korea grant funded by the Korea government(MSIT)(2020R1I1A1A01073937).
文摘In this work,we have prepared the hierarchically nanostructured core–shell NiCo layered double hydroxide(NiCo-LDH)nanosheets-and ZnFe_(2)O_(4) nanocubes-decorated polyacrylonitrile(PAN)/pitch-based carbon nanofibers(PPCNs)webs(NiCo-LDH@PPCNs as cathode and ZnFe_(2)O_(4)@PPCNs as anode materials)with the bonded network structure by a facile and scalable hydrothemal method.Herein,the low-cost pitch with lower softening point(~90℃)as co-precursor was utilized to produce the PAN/pitch-based carbon nanofibers(PPCNs)with enhanced electrical conductivity.The obtained PPCNs with pitch content of 30%(PP30CNs)electrode material delivered higher specific capacitance(~67 F g^(-1))than that(~48 F g^(-1))of the PAN-based carbon nanofibers(PCNs)at 1 A g^(-1),due to the increased electrical conductivity and lower interfacial charge transfer resistance(RCT)of~0.16 U.Further,the NiCo-LDH-decorated PP30CNs(NiCoLDH@PP30CNs)as cathode material showed superior specific capacitance of 1162 F g^(-1) at 1.0 A g^(-1) and ultra-high retention rate of 91.56%at 10 A g^(-1).The ZnFe_(2)O_(4)@PP30CNs as anode material also showed higher specific capacitance of 282 F g^(-1) at 1 A g^(-1) and good rate capability with capacitance retention of 56.73%at 10 A g^(-1).The as-fabricated asymmetric NiCo-LDH@PP30CNs//ZnFe_(2)O_(4)@PP30CNs hybrid supercapacitor device delivered a specific capacitance of~98 F g^(-1) at 1 A g^(-1) and excellent capacitance retention of~88%after 5000 charge–discharge cycles.
文摘In this paper, we conduct research on the post-90s patriotism education under the general background of globalization. Patriotism refl ected the people’s deep feelings about their motherland, refl ects the personal to the dependence of the motherland, it is people for their homeland, racial and the cultural sense of belonging, identity, dignity and honor. It is a moral requirement of regulating the relationship between individuals and the motherland, the principle of political and legal norms, also is the core of the national spirit. Love the motherland’s great rivers as love oneself of the same fl esh and blood, love, brilliant culture of the basic motherland that love his own country constitutes the basic requirements of patriotism. Under this background, we propose our novel perspectives on post-90s patriotism education under the general background of globalization which is meaningful.
文摘In this paper, we conduct research on the current condition and countermeasures of private colleges and universities student physique health test under background of sunshine sports. For the further reform of basic education thought and education idea, strengthen quality education, widening specialty caliber, and promote the reform of the teaching and scientific research combined, gradually establish a notice to strengthen quality education, integrating imparting knowledge, cultivating basic ability, improve quality, develop base solid foundation, wide knowledge and strong ability and high quality specialized talented person as has the characteristics of era of diversified and comprehensive compound talents training mode and our country higher professional sports curriculum framework should be organized by the teachers, teaching conditions, teaching management, assessment, teaching reform, the teaching effect on conception to form a multi-level, multi-factor curriculum system. With this guidance, we propose the enhanced student physique health test paradigm for the private colleges and universities student that will be innovative.
文摘In this context, in order to explore the College Basketball Teaching innovation, combined with the use of literature in college basketball teaching practice, we analyzed the Basketball Teaching, College Basketball proposed teaching content, teaching methods and new ideas evaluated. As the reform of college sports, sports has not only as a sports course, the new curriculum reform to give it a new mission, physical education began to advocate health education and lifelong education. Basketball is one of the most popular college sports curriculum in sports, how college basketball curriculum reform to adapt to the new curriculum requirements, teaching curriculum of college basketball has an important significance. This paper analyzes the college basketball stage teaching problems and solves these problems made comments to promote the curriculum reform of college basketball. We discussed the current situation and problems of college basketball teaching objectives, content, forms, methods, evaluation, etc., in order to promote the deepening of reform of basketball teaching, training students basketball comprehensive ability. And autonomy are all specific requirements of quality education curriculum reform of college basketball raised. College Basketball Teaching should abandon the traditional teaching mode, the establishment of “health first” guiding ideology of teaching in the process of transformation of common objects curriculum teachers, student body double, so that both the interest and technology have both, to impart knowledge, capacity and improve the quality of integration in sports reflects the multifunctional and further highlight its enhanced physical basis, so as to achieve fitness sport education to educational change, and ultimately self-training students to choose basketball and consequent lifetime.
文摘To improve students＇ listening and speaking ability and cultivate thinking habit of speaking is the focus of English teaching. And CLT is the best choice to solve this problem. CLT focus on improving students＇ communicative competence through creating harmonious teaching environment, establishing fruitful teacher-student relationship and organizing effective classroom activities. Through the experiment done in the an independent college oral English class, this thesis tries to prove CLT is effective for improving independent college students＇ communicative competence by tests, questionnaire and interview to seventy non-English freshmen of our college by means of qualitative and quantitative methods. Besides, this thesis provides the teaching model of CLT. Through the painstaking organization of classroom teaching, students can experience the real communicative environment and can cultivate the ability of using language.
基金financially supported by the Hubei Provincial Key Lab of Water System Science for Sponge City Construction (No. 2019–06)the Fundamental Research Funds for the Central Universities (No. 215206002)。
文摘Manganese dioxide(MnO_(2)), a commonly find oxidant in both natural environment and industrial application, plays a crucial role for various organic compound degradation. Tuning the MnO_(2) crystal structure is a cost-effective strategy to boost the oxidation reactions, where the challenge remains due to lacking indepth investigation of the crystal properties. Herein, MnO_(2) with different crystalline structures(x-MnO_(2))including α-, β-and δ-was prepared through the hydrothermal synthesis for a typical organic pollutant removal. The structural and degradation analysis indicated that the oxidation capacity was originated from Mn^(3+) and oxygen vacancies(OVs). The intrinsic relationships between oxidation performance and other physiochemical properties such as morphology and electrochemistry were thoroughly discussed,and positive correlations between oxidation capacity and electrochemical properties were found which eventually led to excellent oxidation performance via modulating the above-mentioned properties. Moreover, the K^(+) content was determined to be the most crucial role in manipulating the structure properties.This work offers a crystal-level insight into the relationship between the crystal structure and oxidative property, promoting rational design of highly efficient oxidant.
基金financially supported by the Natural Science Foundation of Hubei Province, China(No. 2009CDB246)the Applied Basic Research Project of Wuhan City (No. 2015060101010068)
文摘γ-A12O3-supported CeO2 catalysts were pre- pared by microemulsion and impregnation methods and characterized by X-ray diffraction （XRD） and scanning electron microscope （SEM） techniques. At the same time, the desulfurization activity of catalysts was investigated. The results show that nanoscale active substances and a high desulfurization effect are achieved by microemulsion, exhibiting a significant dominance compared with traditional impregnation method. The optimal preparation condition is temperature of 30 ℃ and ratio of [H20]/[surface active agent] of 7 with slow demulsification. The activated catalysts still keep high and stable desulfurization activity during a wide temperature range of 450-600 ℃. Among a series of prepared catalysts, the desulfurization rate of 6CeOz/γ-A1203 is the highest, reaching up to 80 % when temperature is higher than 550℃. The catalytic reduction mechanism of SO2 over nano-CeOz/γ-A1203 follows redox mechanism.
基金supported by the National Natural Science Foundation of China[grant numbers 41771457 and 41601443]the Research Program of the Department of Natural Resources of Hubei Province of China[grant number ZRZY2020KJ03].
文摘Level set method has been extensively used for image segmentation,which is a key technology of water extraction.However,one of the problems of the level-set method is how to find the appropriate initial surface parameters,which will affect the accuracy and speed of level set evolution.Recently,the semantic segmentation based on deep learning has opened the exciting research possibilities.In addition,the Convolutional Neural Network(CNN)has shown a strong feature representation capability.Therefore,in this paper,the CNN method is used to obtain the initial SAR image segmentation map to provide deep a priori information for the zero-level set curve,which only needs to describe the general outline of the water body,rather than the accurate edges.Compared with the traditional circular and rectangular zero-level set initialization method,this method can converge to the edge of the water body faster and more precisely;it will not fall into the local minimum value and be able to obtain accurate segmentation results.The effectiveness of the proposed method is demonstrated by the experimental results of flood disaster monitoring in South China in 2020.
