In recent years,with the reform of College English Teaching in China,listening has occupied a great proportion of both the examination content and classroom teaching.When everyone is seeking a high-efficiency,fast tea...In recent years,with the reform of College English Teaching in China,listening has occupied a great proportion of both the examination content and classroom teaching.When everyone is seeking a high-efficiency,fast teaching method,the use of English original film teaching methods arises spontaneously.Its authentic speaking style,real language environment and rich cultural connotation not only improve the listening comprehension ability of English majors,but also enable students to intuitively understand the culture of Western countries.In this study,by referring to a large number of books and documents,this paper puts forward corresponding strategies for various problems arising from the use of English original film teaching in colleges and universities.English original film teaching can not only create a better learning environment,and stimulate students’interest in learning,but also enable students to actively participate in class discussions.展开更多
Cellulase activities of Anoplophora glabripennis （Motsch.） adults from two host plants （Populus simonii x p pyramidliscr cv. Opera Hsu. and Salix matsudana Koidz） fed on three different host tree species （Acer ne...Cellulase activities of Anoplophora glabripennis （Motsch.） adults from two host plants （Populus simonii x p pyramidliscr cv. Opera Hsu. and Salix matsudana Koidz） fed on three different host tree species （Acer negundo Linn., S. matsudana Koidz and P simonii x P pyramidliscr cv. Opera Hsu.） were investigated. Enzyme activities of endoglucanase and β-glucosidase in the intestines of the insects were measured. The results show that there are no statistically significant differences in the enzyme activities of endoglucanase between male and female insects from the two host plants fed on three host trees, neither inβ-glucosidase. No statistically significant differences in the enzyme activities of endoglucanase and β-glucosidase were found between males and females from the two plants fed on three host tree species, except that the endoglucanase activity in males from the opera poplar fed on Hankow willow is lower than that fed on ash-leaf maple and opera poplar.展开更多
This paper explores the relationship between the original and its translation by interpreting Benjamin's three metaphors from his The Translator's Task. The exploration starts with the metaphor of"the tan...This paper explores the relationship between the original and its translation by interpreting Benjamin's three metaphors from his The Translator's Task. The exploration starts with the metaphor of"the tangent of a circle",where it is interpreted that although the translated version should be faithful to its original in terms of meaning,yet it is a deviation due to different internal and external factors. Then,in the metaphor of"afterlife",the discussion demonstrates that the translated version proceeds from the original,but the original depends on it for its survival and afterlife in different eras. Later,based on the metaphor of"fragments of a vessel",the author states that the original and its translation are equal and complementary,just like the fragments of a vessel,responsible for the development and renewal of each other through translation. Finally,it is concluded that a better understanding of their relationship can offer us a new perspective in translation studies and practice.展开更多
Bamboo is a green construction material in line with sustainable development strategies.The use of raw bamboo in architecture has existed since ancient times.In the long development years of original bamboo buildings,...Bamboo is a green construction material in line with sustainable development strategies.The use of raw bamboo in architecture has existed since ancient times.In the long development years of original bamboo buildings,many areas in the world gradually formed unique bamboo buildings,which have become an important local cultural feature.For building structures,joints are the key to ensure structural load transfer.Because of hollow and thin-walled material property of bamboo,the connection in raw bamboo buildings has always been a major difficulty and problem in the application of bamboo,which seriously hinders the development of original bamboo structures.In order to promote the use of raw bamboo,two traditional connection methods in raw bamboo structures are described in this paper firstly,with the advantages and disadvantages of the two methods pointed out.Also,research progress on four categories of raw bamboo building joints is described namely,bolt joints,steel member joints,filler reinforced joints and other types of joints.This work can provide a reference for future research and engineering applications.展开更多
The research used industrial by-products original phosphogypsum(PG)as the main raw material,slag(SG)and Portland cement(PC)as auxiliary materials,and the optimal additive amount was determined according to the compres...The research used industrial by-products original phosphogypsum(PG)as the main raw material,slag(SG)and Portland cement(PC)as auxiliary materials,and the optimal additive amount was determined according to the compressive strength value of the sample.Comprehensively evaluate the water resistance and volume stability of the samples,and determine the best formula for new roadbed stabilized materials.The results showed that when the weight ratio of PG,slag and cement was OPG:SG:PC=6:3:1,and mixed with 5%micro silica fume(MSF)and 3‰hydroxypropyl methyl cellulose(HPMC),the sample’s comprehensive performance was the best,specifically,the sample’s compressive strength in 60 days reached 28.8 MPa,the softening coefficient reached 0.9,and the expansion rate was stable at about−0.2%.In addition,the mechanism of action of enhancers MSF and HPMC was analyzed according to use Vicat device,X-ray diffractometer and scanning electron microscope.The best formula SP3GH3 has the best curing effect on soil.The 28-day unconfined compressive strength(UCS)of the sample reached 2.4 MPa,the expansion rate was less than 0.09%,and the water stability coefficient was above 0.79,which was higher than that of the samples cured by traditional cement and lime during the same period.展开更多
The transformation behavior and tensile properties of an ultra-high-strength transformation-induced plasticity （TRIP） steel （0.2C-2.0Si-I.SMn） were investigated by different heat treatments for automobile applicat...The transformation behavior and tensile properties of an ultra-high-strength transformation-induced plasticity （TRIP） steel （0.2C-2.0Si-I.SMn） were investigated by different heat treatments for automobile applications. The results show that F-TRIP steel, a tradi- tional TRIP steel containing as-cold-rolled ferfite and pearlite as the original microstructure, consists of equiaxed grains of intercritical ferrite surrounded by discrete particles of M/RA and B. In contrast, M-TRIP steel, a modified TRiP-aided steel with martensite as the original mi- crostlucture, containing full martensite as the original microstructure is comprised of lath-shaped grains of ferrite separated by lath-shaped martensite/retained austenite and bainite. Most of the austenite in F-TRIP steel is granular, while the austenite in M-TRIP steel is lath-shaped. The volume fraction of the retained austenite as well as its carbon content is lower in F-TRIP steel than in M-TRIP steel, and austenite grains in M-TRIP steel are much finer than those in F-TRIP steel. Therefore, M-TRIP steel was concluded to have a higher austenite stability, re- sulting in a lower transformation rate and consequently contributing to a higher elongation compared to F-TRIP steel. Work hardening be- havior is also discussed for both types of steel.展开更多
Original organisms are the biological precursors of organic matter in source rocks. Original organisms in source rocks are informative for oil-source rock correlation and hydrocarbon potential evaluation, especially f...Original organisms are the biological precursors of organic matter in source rocks. Original organisms in source rocks are informative for oil-source rock correlation and hydrocarbon potential evaluation, especially for source rocks which have high-over level of thermal maturity. Systematic identification of original organism assemblages of the Lower Paleozoic potential source rocks and detailed carbon isotopic composition of kerogen analyses were conducted for four outcrop sections in the Tarim basin. Results indicated that the original organism assemblages of the lower part of the Lower Cambrian were composed mainly of benthic algae, whereas those of the Upper Cambrian and the Ordovician were characterized by planktonic algae. Kerogen carbon isotopic data demonstrated that the δ13 Ckerogen values of source rocks dominated by benthic algae are lower than-34‰, whereas the δ13 Ckerogen values of source rocks dominated by planktonic algae are higher than-30‰ in general. We tentatively suggested that the carbon species those are utilized by algae and the carbon isotopic fractionation during photosynthesis are the major controls for the δ13 Ckerogen values in the Lower Paleozoic source rocks in the Tarim basin. Correlating the δ13 C values of oils exploited in the Tarim basin, the original organism assemblages, and δ13 Ckerogen values of source rocks, it implied that the Lower Paleozoic oils exploited in the Tarim basin should be sourced from the source rocks with original organism assemblages dominated by planktonic algae, and the hydrocarbon sourced from the Cambrian benthic algae should be of great exploration potential in future. Original organism assemblages in source rocks can provide important clues for oil-source rocks correlation, especially for the source rocks with high thermal maturity.展开更多
In the light of the knowledge gained by the study of electrochemical flotation for galena and selective flotation of galena from lead zinc iron sulfide ores, a technology for accurate potential control based on intrin...In the light of the knowledge gained by the study of electrochemical flotation for galena and selective flotation of galena from lead zinc iron sulfide ores, a technology for accurate potential control based on intrinsic electrochemical behavior in grinding flotation systems has been developed and is called "Original Potential Flotation (OPF)". The optimum conditions for the original potential flotation of galena from Pb Zn Fe sulfide ores are as follows: pH values of 12.5 12.8, potential of 150 180 mV and with diethyldithioncarbamate (DDTC) as collector. Lime is used as a regulator of pH, meanwhile, and can stabilize special potential very well, and this special potential is exactly the flotation potential of galena. This technology has been applied successfully in potential control flotation of galena in many complex lead zinc iron sulfide mines in China.展开更多
No matter from the perspective of slope protection, landscape effect and construction cost, or from the perspective of ecological benefit, the development of original ecological tridimensional vegetation has become th...No matter from the perspective of slope protection, landscape effect and construction cost, or from the perspective of ecological benefit, the development of original ecological tridimensional vegetation has become the inevitable trend for slope vegetation in pursuit of protecting ecological condition, decreasing soil erosion, maintaining ecological balance and beautifying environment of slope. The concept of original ecological tridimensional slope vegetation is proposed in this paper, and the original ecological tridimensional slope vegetation is studied through theoretical analysis and experiments. Specifically, the mechanical effect of slope vegetation in reinforcing the cohesion and shear strength of soil mass is firstly discussed, and then experiments are performed to study the water interception and containing function of slope under various vegetation conditions. Moreover, the relation between soil moisture and cohesion, the relation between root distribution density and cohesion, and the relation between root distribution density and soil shear strength are also studied based on experiments.Finally, based on field observation, the soil erosion states of slope under various vegetation conditions are comparatively studied. It is found that the original ecological tridimensional slope, which combines grass,shrub and tree, can generate comprehensive slope protection effects, and hence strengthen the slope protection ability and bring multiple slope protection benefits. Thereby, the theoretical foundation for developing original ecological tridimensional slope vegetation is established.展开更多
Accurately obtaining the original information of an in-situ rock via coring is a significant guiding step for exploring and developing deep oil and gas resources.It is difficult for traditional coring technology and e...Accurately obtaining the original information of an in-situ rock via coring is a significant guiding step for exploring and developing deep oil and gas resources.It is difficult for traditional coring technology and equipment to preserve the original information in deep rocks.This study develops a technology for insitu substance-preserved(ISP),moisture-preserved(IMP),and light-preserved(ILP)coring.This technology stores the original information in real time by forming a solid sealing film on the in-situ sample during coring.This study designed the ISP-IMP-ILP-Coring process and tool.In addition,an ISP-IMP-ILPCoring process simulation system was developed.The effects of temperature,pressure,and film thickness on the quality of the in-situ film were investigated by performing in-situ film-forming simulation experiments.A solid sealing film with a thickness of 2-3 mm can be formed;it completely covers the core sample and has uniform thickness.The film maintains good ISP-IMP-ILP properties and can protect the core sample in the in-situ environment steadily.This study verifies the feasibility of“film formation during coring”technology and provides strong support for the engineering application of ISP-IMP-ILPCoring technology.展开更多
Original potential flotation (OPF) technology, which controls potential by chemical atomsphere resulted from various redox reactions in grinding flotation system, but neither through the use of redox reagents nor thro...Original potential flotation (OPF) technology, which controls potential by chemical atomsphere resulted from various redox reactions in grinding flotation system, but neither through the use of redox reagents nor through the application of potentials from an external source, was proposed. For lead zinc iron sulphide minerals flotation system, the relationship among technological parameters such as pH, E op , collectors and flotaion time, was studied. The optimum conditions for the selective flotation of galena from the pb Zn Fe sulfide ores were: pH of 12.5～12.8,the pulp potential of 150～180 mV and with diethyldithioncarbamate (DDTC) as collector.展开更多
To study the influence of original defects on the dynamic stability of the columns under periodic transient loadings,the approximate solution method and the Fourier method of the stable periodic solution are adopted w...To study the influence of original defects on the dynamic stability of the columns under periodic transient loadings,the approximate solution method and the Fourier method of the stable periodic solution are adopted while considering the influence of original defects on columns.The dynamic stability of the columns under periodic transient loadings is analyzed theoretically.Through the study of different deflections,the dynamic instability of the columns is obtained by Maple software.The results of theoretical analysis show that the larger the original defects,the greater the unstable area,the stable solution amplitude of columns and the risk of instability caused by parametric resonance will be.The damping of columns is a vital factor in reducing dynamic instability at the same original defects.On the basis of the Mathieu-Hill equation,the relationship between the original defects and deflection is deduced,and the dynamic instability region of the columns under different original defects is obtained.Therefore,reducing the original defects of columns can further enhance the dynamic stability of the compressed columns in practical engineering.展开更多
The author would like to inform the readers that the correct form of title ＂Role of remote sensing, geographic bioinformatics system and bioinformatics in kala-azar epidemiology＂ , content in ab-stract ＂The computa...The author would like to inform the readers that the correct form of title ＂Role of remote sensing, geographic bioinformatics system and bioinformatics in kala-azar epidemiology＂ , content in ab-stract ＂The computational approaches like remote sensing, geographic information system （GIS） and bioinformatics are the key re-sources for the detection and distribution of vectors, patterns, ecologi- cal and environmental factors and genomic and proteomic analysis.＂, and keyword ＂geographical bioinformatics systems （GIS）＂ should be read as follows： title ＂Role of remote sensing, geographical bioinformation system and bioinformatics in kala-azar epidemiology＂, content in abstract ＂The com-putational approaches like remote sensing, geographical information system （GIS） and bioinformat-ics are the key re-sources for the detection and distribution of vectors, patterns, ecological and envi-ronmental factors and genomic and proteomic analysis.＂, and keyword ＂geographical bioinformation system （GIS） ＂.展开更多
Dot,line,plane,body are dominant elements for creating visual originality of modern landscapes,among which dot is the fundamental one in the visual design.It is a significant subject in modern landscape design to crea...Dot,line,plane,body are dominant elements for creating visual originality of modern landscapes,among which dot is the fundamental one in the visual design.It is a significant subject in modern landscape design to create visual originality and style of dotted landscapes,and also a premise for humanistic design.The visual characteristics of dotted landscapes were analyzed from the perspectives of style,size,location,configuration and so on.The principles of creating green visual originality for dotted landscapes were concluded,that is,coordination and unification,ratio and scale,balance and stability,rhythm and tempo.Then novel and elegant dotted landscapes can be created by using new materials and techniques,applying deformation,cutting and connection,alternation,distortion and rotation;by adopting motif composition method,motif with outstanding features can be selected as dotted landscapes to form contrast with background and break the rigid atmosphere.展开更多
Now,daoyin has developed into a complete set of conventional movement patterns,such as Baduanjin,Yijinjing,and Wuqinxi.However,the original meaning and the connotation of daoyin is ignored by people gradually,which wi...Now,daoyin has developed into a complete set of conventional movement patterns,such as Baduanjin,Yijinjing,and Wuqinxi.However,the original meaning and the connotation of daoyin is ignored by people gradually,which will hinder the development of daoyin and make the specific application difficult.In this article,we will explore the basic composition of the daoyin–“movement”and its intrinsic basis–“essential qi”to think about the original meaning and connotation of daoyin.展开更多
Using English original movies for listening teaching has become a new way for listening teaching.Based on the related researches,some ways of teaching English listening with original English movies are given with a te...Using English original movies for listening teaching has become a new way for listening teaching.Based on the related researches,some ways of teaching English listening with original English movies are given with a teaching example.展开更多
Outlaws of the Marsh is familiar to both Chinese and Westerners. Through the long history it can still gain a remarkable statusin literature. This paper aims to analysis the adapted version of its translation and try ...Outlaws of the Marsh is familiar to both Chinese and Westerners. Through the long history it can still gain a remarkable statusin literature. This paper aims to analysis the adapted version of its translation and try to give some inspiration on translation practice.展开更多
Economic invigoration relies on education. With the rapid advancement of science and technology and the fast development of society, more and more demand has been put on fostering talented people. And how to improve s...Economic invigoration relies on education. With the rapid advancement of science and technology and the fast development of society, more and more demand has been put on fostering talented people. And how to improve students'originality has become one of the hot topics in Chinese education forum. Beginning with analyzing different foreign language teaching approaches in foreign countries and the general language teaching situation in China, this article holds that enhancing teachers'qualification, analyzing the factors that influ ence students'originality, creating positive classroom atmosphere and conducting creative class activities are indispensable measures of im proving students'originality in classroom teaching.展开更多
文摘In recent years,with the reform of College English Teaching in China,listening has occupied a great proportion of both the examination content and classroom teaching.When everyone is seeking a high-efficiency,fast teaching method,the use of English original film teaching methods arises spontaneously.Its authentic speaking style,real language environment and rich cultural connotation not only improve the listening comprehension ability of English majors,but also enable students to intuitively understand the culture of Western countries.In this study,by referring to a large number of books and documents,this paper puts forward corresponding strategies for various problems arising from the use of English original film teaching in colleges and universities.English original film teaching can not only create a better learning environment,and stimulate students’interest in learning,but also enable students to actively participate in class discussions.
基金supported by the National Natural Science Foundation of China (Grant No. 30571503)the Program for Changjiang Scholars and Innovative Research Team in Universities (PCSIRT0607)
文摘Cellulase activities of Anoplophora glabripennis （Motsch.） adults from two host plants （Populus simonii x p pyramidliscr cv. Opera Hsu. and Salix matsudana Koidz） fed on three different host tree species （Acer negundo Linn., S. matsudana Koidz and P simonii x P pyramidliscr cv. Opera Hsu.） were investigated. Enzyme activities of endoglucanase and β-glucosidase in the intestines of the insects were measured. The results show that there are no statistically significant differences in the enzyme activities of endoglucanase between male and female insects from the two host plants fed on three host trees, neither inβ-glucosidase. No statistically significant differences in the enzyme activities of endoglucanase and β-glucosidase were found between males and females from the two plants fed on three host tree species, except that the endoglucanase activity in males from the opera poplar fed on Hankow willow is lower than that fed on ash-leaf maple and opera poplar.
文摘This paper explores the relationship between the original and its translation by interpreting Benjamin's three metaphors from his The Translator's Task. The exploration starts with the metaphor of"the tangent of a circle",where it is interpreted that although the translated version should be faithful to its original in terms of meaning,yet it is a deviation due to different internal and external factors. Then,in the metaphor of"afterlife",the discussion demonstrates that the translated version proceeds from the original,but the original depends on it for its survival and afterlife in different eras. Later,based on the metaphor of"fragments of a vessel",the author states that the original and its translation are equal and complementary,just like the fragments of a vessel,responsible for the development and renewal of each other through translation. Finally,it is concluded that a better understanding of their relationship can offer us a new perspective in translation studies and practice.
基金supported by the Natural Science Foundation of Jiang-su Province(No.BK20181402)the National Natural Science Foundation of China(51878354)+2 种基金National Key R&D Program of China,the Open Fund Project from Key Laboratory of Concrete and Pre-stressed Concrete Structure of Ministry of Education(Southeast university)the China Postdoctoral Science Foundation(2015M580382)Jiangsu Postdoctoral Science Foundation Project(1501037A),Qing Lan Project,and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘Bamboo is a green construction material in line with sustainable development strategies.The use of raw bamboo in architecture has existed since ancient times.In the long development years of original bamboo buildings,many areas in the world gradually formed unique bamboo buildings,which have become an important local cultural feature.For building structures,joints are the key to ensure structural load transfer.Because of hollow and thin-walled material property of bamboo,the connection in raw bamboo buildings has always been a major difficulty and problem in the application of bamboo,which seriously hinders the development of original bamboo structures.In order to promote the use of raw bamboo,two traditional connection methods in raw bamboo structures are described in this paper firstly,with the advantages and disadvantages of the two methods pointed out.Also,research progress on four categories of raw bamboo building joints is described namely,bolt joints,steel member joints,filler reinforced joints and other types of joints.This work can provide a reference for future research and engineering applications.
基金This work was supported by the Jiangsu Provincial Science and Technology Department’s Social Development-Major Science and Technology Demonstration Project(Grant No.BE2018697)the Jiangsu Provincial Science and Technology Department Social Development Project(Grant No.BE2017704)the Scientific Research Project of the Suqian Municipal Transportation Bureau.
文摘The research used industrial by-products original phosphogypsum(PG)as the main raw material,slag(SG)and Portland cement(PC)as auxiliary materials,and the optimal additive amount was determined according to the compressive strength value of the sample.Comprehensively evaluate the water resistance and volume stability of the samples,and determine the best formula for new roadbed stabilized materials.The results showed that when the weight ratio of PG,slag and cement was OPG:SG:PC=6:3:1,and mixed with 5%micro silica fume(MSF)and 3‰hydroxypropyl methyl cellulose(HPMC),the sample’s comprehensive performance was the best,specifically,the sample’s compressive strength in 60 days reached 28.8 MPa,the softening coefficient reached 0.9,and the expansion rate was stable at about−0.2%.In addition,the mechanism of action of enhancers MSF and HPMC was analyzed according to use Vicat device,X-ray diffractometer and scanning electron microscope.The best formula SP3GH3 has the best curing effect on soil.The 28-day unconfined compressive strength(UCS)of the sample reached 2.4 MPa,the expansion rate was less than 0.09%,and the water stability coefficient was above 0.79,which was higher than that of the samples cured by traditional cement and lime during the same period.
基金financially supported by the National Natural Science Foundation of China (No. 51271035)The financial support of the Beijing Laboratory of Metallic Materials and Processing for Modern Transportation
文摘The transformation behavior and tensile properties of an ultra-high-strength transformation-induced plasticity （TRIP） steel （0.2C-2.0Si-I.SMn） were investigated by different heat treatments for automobile applications. The results show that F-TRIP steel, a tradi- tional TRIP steel containing as-cold-rolled ferfite and pearlite as the original microstructure, consists of equiaxed grains of intercritical ferrite surrounded by discrete particles of M/RA and B. In contrast, M-TRIP steel, a modified TRiP-aided steel with martensite as the original mi- crostlucture, containing full martensite as the original microstructure is comprised of lath-shaped grains of ferrite separated by lath-shaped martensite/retained austenite and bainite. Most of the austenite in F-TRIP steel is granular, while the austenite in M-TRIP steel is lath-shaped. The volume fraction of the retained austenite as well as its carbon content is lower in F-TRIP steel than in M-TRIP steel, and austenite grains in M-TRIP steel are much finer than those in F-TRIP steel. Therefore, M-TRIP steel was concluded to have a higher austenite stability, re- sulting in a lower transformation rate and consequently contributing to a higher elongation compared to F-TRIP steel. Work hardening be- havior is also discussed for both types of steel.
基金funded by National Natural Science Foundation of China (Grant No. U1663201, 41472099 and 41872155)the Strategic Priority Research Program of the Chinese Academy of Science (Grant No. XDA14010404)CNPC innovation Foundation (2016D-5007-0102)
文摘Original organisms are the biological precursors of organic matter in source rocks. Original organisms in source rocks are informative for oil-source rock correlation and hydrocarbon potential evaluation, especially for source rocks which have high-over level of thermal maturity. Systematic identification of original organism assemblages of the Lower Paleozoic potential source rocks and detailed carbon isotopic composition of kerogen analyses were conducted for four outcrop sections in the Tarim basin. Results indicated that the original organism assemblages of the lower part of the Lower Cambrian were composed mainly of benthic algae, whereas those of the Upper Cambrian and the Ordovician were characterized by planktonic algae. Kerogen carbon isotopic data demonstrated that the δ13 Ckerogen values of source rocks dominated by benthic algae are lower than-34‰, whereas the δ13 Ckerogen values of source rocks dominated by planktonic algae are higher than-30‰ in general. We tentatively suggested that the carbon species those are utilized by algae and the carbon isotopic fractionation during photosynthesis are the major controls for the δ13 Ckerogen values in the Lower Paleozoic source rocks in the Tarim basin. Correlating the δ13 C values of oils exploited in the Tarim basin, the original organism assemblages, and δ13 Ckerogen values of source rocks, it implied that the Lower Paleozoic oils exploited in the Tarim basin should be sourced from the source rocks with original organism assemblages dominated by planktonic algae, and the hydrocarbon sourced from the Cambrian benthic algae should be of great exploration potential in future. Original organism assemblages in source rocks can provide important clues for oil-source rocks correlation, especially for the source rocks with high thermal maturity.
文摘In the light of the knowledge gained by the study of electrochemical flotation for galena and selective flotation of galena from lead zinc iron sulfide ores, a technology for accurate potential control based on intrinsic electrochemical behavior in grinding flotation systems has been developed and is called "Original Potential Flotation (OPF)". The optimum conditions for the original potential flotation of galena from Pb Zn Fe sulfide ores are as follows: pH values of 12.5 12.8, potential of 150 180 mV and with diethyldithioncarbamate (DDTC) as collector. Lime is used as a regulator of pH, meanwhile, and can stabilize special potential very well, and this special potential is exactly the flotation potential of galena. This technology has been applied successfully in potential control flotation of galena in many complex lead zinc iron sulfide mines in China.
基金supported by National Natural Science Foundation of China (Grant No. 41372307)the Yunan Provincial Communication Research Fund (Grant No. 2010 (A) 06-b)the Young Scholar Foundation of Central South University of Forestry and Technology (Grant No. 2008051B)
文摘No matter from the perspective of slope protection, landscape effect and construction cost, or from the perspective of ecological benefit, the development of original ecological tridimensional vegetation has become the inevitable trend for slope vegetation in pursuit of protecting ecological condition, decreasing soil erosion, maintaining ecological balance and beautifying environment of slope. The concept of original ecological tridimensional slope vegetation is proposed in this paper, and the original ecological tridimensional slope vegetation is studied through theoretical analysis and experiments. Specifically, the mechanical effect of slope vegetation in reinforcing the cohesion and shear strength of soil mass is firstly discussed, and then experiments are performed to study the water interception and containing function of slope under various vegetation conditions. Moreover, the relation between soil moisture and cohesion, the relation between root distribution density and cohesion, and the relation between root distribution density and soil shear strength are also studied based on experiments.Finally, based on field observation, the soil erosion states of slope under various vegetation conditions are comparatively studied. It is found that the original ecological tridimensional slope, which combines grass,shrub and tree, can generate comprehensive slope protection effects, and hence strengthen the slope protection ability and bring multiple slope protection benefits. Thereby, the theoretical foundation for developing original ecological tridimensional slope vegetation is established.
基金the National Natural Science Foundation of China(grant numbers 51827901,52004166)funded by the Program for Shenzhen Basic Research Program(General Program)(No.JCYJ20190808153416970)Guangdong Introducing Innovative and Enterpreneurial Teams(No.2019ZT08G315)
文摘Accurately obtaining the original information of an in-situ rock via coring is a significant guiding step for exploring and developing deep oil and gas resources.It is difficult for traditional coring technology and equipment to preserve the original information in deep rocks.This study develops a technology for insitu substance-preserved(ISP),moisture-preserved(IMP),and light-preserved(ILP)coring.This technology stores the original information in real time by forming a solid sealing film on the in-situ sample during coring.This study designed the ISP-IMP-ILP-Coring process and tool.In addition,an ISP-IMP-ILPCoring process simulation system was developed.The effects of temperature,pressure,and film thickness on the quality of the in-situ film were investigated by performing in-situ film-forming simulation experiments.A solid sealing film with a thickness of 2-3 mm can be formed;it completely covers the core sample and has uniform thickness.The film maintains good ISP-IMP-ILP properties and can protect the core sample in the in-situ environment steadily.This study verifies the feasibility of“film formation during coring”technology and provides strong support for the engineering application of ISP-IMP-ILPCoring technology.
文摘Original potential flotation (OPF) technology, which controls potential by chemical atomsphere resulted from various redox reactions in grinding flotation system, but neither through the use of redox reagents nor through the application of potentials from an external source, was proposed. For lead zinc iron sulphide minerals flotation system, the relationship among technological parameters such as pH, E op , collectors and flotaion time, was studied. The optimum conditions for the selective flotation of galena from the pb Zn Fe sulfide ores were: pH of 12.5～12.8,the pulp potential of 150～180 mV and with diethyldithioncarbamate (DDTC) as collector.
基金The National Natural Science Foundation of Chin(No.51078354)
文摘To study the influence of original defects on the dynamic stability of the columns under periodic transient loadings,the approximate solution method and the Fourier method of the stable periodic solution are adopted while considering the influence of original defects on columns.The dynamic stability of the columns under periodic transient loadings is analyzed theoretically.Through the study of different deflections,the dynamic instability of the columns is obtained by Maple software.The results of theoretical analysis show that the larger the original defects,the greater the unstable area,the stable solution amplitude of columns and the risk of instability caused by parametric resonance will be.The damping of columns is a vital factor in reducing dynamic instability at the same original defects.On the basis of the Mathieu-Hill equation,the relationship between the original defects and deflection is deduced,and the dynamic instability region of the columns under different original defects is obtained.Therefore,reducing the original defects of columns can further enhance the dynamic stability of the compressed columns in practical engineering.
文摘The author would like to inform the readers that the correct form of title ＂Role of remote sensing, geographic bioinformatics system and bioinformatics in kala-azar epidemiology＂ , content in ab-stract ＂The computational approaches like remote sensing, geographic information system （GIS） and bioinformatics are the key re-sources for the detection and distribution of vectors, patterns, ecologi- cal and environmental factors and genomic and proteomic analysis.＂, and keyword ＂geographical bioinformatics systems （GIS）＂ should be read as follows： title ＂Role of remote sensing, geographical bioinformation system and bioinformatics in kala-azar epidemiology＂, content in abstract ＂The com-putational approaches like remote sensing, geographical information system （GIS） and bioinformat-ics are the key re-sources for the detection and distribution of vectors, patterns, ecological and envi-ronmental factors and genomic and proteomic analysis.＂, and keyword ＂geographical bioinformation system （GIS） ＂.
文摘Dot,line,plane,body are dominant elements for creating visual originality of modern landscapes,among which dot is the fundamental one in the visual design.It is a significant subject in modern landscape design to create visual originality and style of dotted landscapes,and also a premise for humanistic design.The visual characteristics of dotted landscapes were analyzed from the perspectives of style,size,location,configuration and so on.The principles of creating green visual originality for dotted landscapes were concluded,that is,coordination and unification,ratio and scale,balance and stability,rhythm and tempo.Then novel and elegant dotted landscapes can be created by using new materials and techniques,applying deformation,cutting and connection,alternation,distortion and rotation;by adopting motif composition method,motif with outstanding features can be selected as dotted landscapes to form contrast with background and break the rigid atmosphere.
基金This is a budget Project of Shanghai Municipal Education Commission(2016YSN77).
文摘Now,daoyin has developed into a complete set of conventional movement patterns,such as Baduanjin,Yijinjing,and Wuqinxi.However,the original meaning and the connotation of daoyin is ignored by people gradually,which will hinder the development of daoyin and make the specific application difficult.In this article,we will explore the basic composition of the daoyin–“movement”and its intrinsic basis–“essential qi”to think about the original meaning and connotation of daoyin.
文摘Using English original movies for listening teaching has become a new way for listening teaching.Based on the related researches,some ways of teaching English listening with original English movies are given with a teaching example.
文摘Outlaws of the Marsh is familiar to both Chinese and Westerners. Through the long history it can still gain a remarkable statusin literature. This paper aims to analysis the adapted version of its translation and try to give some inspiration on translation practice.
文摘Economic invigoration relies on education. With the rapid advancement of science and technology and the fast development of society, more and more demand has been put on fostering talented people. And how to improve students'originality has become one of the hot topics in Chinese education forum. Beginning with analyzing different foreign language teaching approaches in foreign countries and the general language teaching situation in China, this article holds that enhancing teachers'qualification, analyzing the factors that influ ence students'originality, creating positive classroom atmosphere and conducting creative class activities are indispensable measures of im proving students'originality in classroom teaching.
