Hua Shou(1304-1386)styled himself Ying Ning Sheng.He was also known as Hua Boren.His ancestral home was in Xiang Town,Xu Prefecture(present Xuchang,Henan province).His birth place was Yizhen,Jiangsu province.Later he ...Hua Shou(1304-1386)styled himself Ying Ning Sheng.He was also known as Hua Boren.His ancestral home was in Xiang Town,Xu Prefecture(present Xuchang,Henan province).His birth place was Yizhen,Jiangsu province.Later he moved to Yuyao,Zhejiang province.He was one of the distinguished practitioners of the late Yuan and early Ming dynasties.His writings include Elaboration of the Fourteen Meridians(Shi Si Jing Fa Hui),Notes on Handwritten Copy of Basic Questions(Du Su Wen Chao),The Essentials for Physicians(Zhen Jia Shu Yao).展开更多
Climate conditions play a crucial role in the survival of mountain communities, whose survival already critically depends on socioeconomic factors. In the case of montane areas that are prone to natural haz-ards, such...Climate conditions play a crucial role in the survival of mountain communities, whose survival already critically depends on socioeconomic factors. In the case of montane areas that are prone to natural haz-ards, such as alpine slope failure and debris flows, climatic factors exert a major influence that should be considered when creating appropriate sustainable scenarios. In fact, it has been shown that climate change alters the availability of ecosystem services （ES）, thus increasing the risks of declining soil fertility and reduced water availability, as well as the loss of grassland, potential shifts in regulatory services （e.g., protection from natural hazards）, and cultural services. This study offers a preliminary discussion on a case study of a region in the Italian Alps that is experiencing increased extreme precipitation and erosion, and where an isolated and historically resilient community directly depends on a natural resource econ- omy. Preliminary results show that economic factors have influenced past population trends of the Novalesa community in the Piemonte Region in northwest Italy. However, the increasing number of rock fall and debris flow events, which are triggered by meteo-climatic factors, may further influence the livelihood and weflbeing of this community, and of other similar communities around the world, Therefore, environmental monitoring and data analysis will be important means of detecting trends in landscape and climate change and choosing appropriate planning options. Such analysis, in turn, would ensure the survival of about 10% of the global population, and would also represent a possibility for future economic development in critical areas prone to poverty conditions.展开更多
The development and wide application of genetic transformation for cotton improvement are restrained by the unresolved problem of genotype dependence in regeneration in vitro.High embryogenic and regenerative potentia...The development and wide application of genetic transformation for cotton improvement are restrained by the unresolved problem of genotype dependence in regeneration in vitro.High embryogenic and regenerative potential have been obtained for limited number of Coker type genotypes。展开更多
The aim of this study is to characterize physically and mechanically a polyester/fiber palm petiole composite material. This work made it possible to provide the local database of composite materials but also to devel...The aim of this study is to characterize physically and mechanically a polyester/fiber palm petiole composite material. This work made it possible to provide the local database of composite materials but also to develop agricultural waste. According to BSI 2782 standard three formulations [A (10% fiber, 90% polyester);B (20% fiber, 80% polyester) and C (30% fiber, 70% po</span><span style="font-family:Verdana;">lyester)]. Water Absorption rate, density, compressive and three points</span><span style="font-family:Verdana;"> bending tests are carried out on the samples obtained by the contact molding method for each formulation. The material composite obtained by adding fibers from palm oil petiole has a density of 17.98% lower than the one made of pure polyester. Fiber reinforcement rate has no impact on the density of the composite. Formulation A most absorbs water while formulation C has good tensile/compression characteristics and the greatest breaking stress in bending among the three formulations.展开更多
We present in this work how to use the dura palm kernel shell powders as loads for the elaboration by extrusion of PVC tubes. The transformation of dura palm kernel shells into micronized shell powder as well as its c...We present in this work how to use the dura palm kernel shell powders as loads for the elaboration by extrusion of PVC tubes. The transformation of dura palm kernel shells into micronized shell powder as well as its characterization was the subject of recent work. We carried out, the formulations by using the industrial scales of precision, the mixtures of the instrants with an industrial machine of mark HENSHLLE N˚2 MAIN 570762, the routine tests by ATG/DSC then by IRTF, the extrusion of the tubes with an extruder twin-screw with 9 rooms of transformation finally the tests of conformity by the observations and the analyses. We obtained for the formulations the dosage of 0%, 4.01%, 12.54%, 23.03%, 32.01%, 38.01%, 51.02% representing the percentage of hull powder in the mixture, the machine mixing gave perfectly homogeneous powders, the routine tests showed that the hull powder keeps all its properties until the end of the shaping whatever the percentage of hulls contained in the PVC, the extrusion gave tubes for each formulation and the conformity tests gave perfectly round tubes of diameter 90 × 82 mm, a coloration going from white grey at 0% to dark black at 51.02% showing the influence of the carbon black and the color of the shell powder according to its proportion. The infrared of the tubes obtained shows for each formulation a variation of the CH<sub>2</sub> and CH bonds and a decrease of the −OH bonds. The thermogravimetric analyses and the differential calorimetric analyses of the tubes of each formulation, show each time that the quantity of shell powders in the mixture influences the PVC tubes obtained. Thus, we obtain a variation of the phase temperatures according to the dosage, giving from 108.72<span style="white-space:normal;">˚</span>C to 76.56<span style="white-space:normal;">˚</span>C for the glass transition temperature and from 494.71<span style="white-space:normal;">˚</span>C to 414.56<span style="white-space:normal;">˚</span>C for the melting temperature, at the DSC and a progressive decrease of the mass following the heat absorption with each time 4 phases instead of 5 for the unloaded PVC tubes at the ATG according to the dosage.展开更多
Previous multi-view 3D human pose estimation methods neither correlate different human joints in each view nor model learnable correlations between the same joints in different views explicitly,meaning that skeleton s...Previous multi-view 3D human pose estimation methods neither correlate different human joints in each view nor model learnable correlations between the same joints in different views explicitly,meaning that skeleton structure information is not utilized and multi-view pose information is not completely fused.Moreover,existing graph convolutional operations do not consider the specificity of different joints and different views of pose information when processing skeleton graphs,making the correlation weights between nodes in the graph and their neighborhood nodes shared.Existing Graph Convolutional Networks(GCNs)cannot extract global and deeplevel skeleton structure information and view correlations efficiently.To solve these problems,pre-estimated multiview 2D poses are designed as a multi-view skeleton graph to fuse skeleton priors and view correlations explicitly to process occlusion problem,with the skeleton-edge and symmetry-edge representing the structure correlations between adjacent joints in each viewof skeleton graph and the view-edge representing the view correlations between the same joints in different views.To make graph convolution operation mine elaborate and sufficient skeleton structure information and view correlations,different correlation weights are assigned to different categories of neighborhood nodes and further assigned to each node in the graph.Based on the graph convolution operation proposed above,a Residual Graph Convolution(RGC)module is designed as the basic module to be combined with the simplified Hourglass architecture to construct the Hourglass-GCN as our 3D pose estimation network.Hourglass-GCNwith a symmetrical and concise architecture processes three scales ofmulti-viewskeleton graphs to extract local-to-global scale and shallow-to-deep level skeleton features efficiently.Experimental results on common large 3D pose dataset Human3.6M and MPI-INF-3DHP show that Hourglass-GCN outperforms some excellent methods in 3D pose estimation accuracy.展开更多
Pun,as a figure of speech applied in advertisements,can make the advertisements more vivid and indelible by adding attraction and humor,stimulating consumers' purchasing desire.Based on the elaboration of puns in ...Pun,as a figure of speech applied in advertisements,can make the advertisements more vivid and indelible by adding attraction and humor,stimulating consumers' purchasing desire.Based on the elaboration of puns in English advertisements from the cognitive perspective,this paper attempts to analyze those puns under the guidance of relevant cognitive theoretical framework such as figure/ground theory,prominence view and conceptual blending theory.It also aims to explore the human cognitive activities involved in creation and understanding of advertising language.展开更多
A comparative study of reactivity between air-CH4 or air-CO gas flows and CeO2, La2O3 and Lu2O3 rare earth oxides was per- formed using Fourier transform infrared spectroscopy analyses of CO2 gas resulted from the con...A comparative study of reactivity between air-CH4 or air-CO gas flows and CeO2, La2O3 and Lu2O3 rare earth oxides was per- formed using Fourier transform infrared spectroscopy analyses of CO2 gas resulted from the conversion of CH4 or CO gases. Polyerystalline samples of CeO2, La2O3 and Lu2O3 were first prepared by specific precipitation methods followed by low temperature calcination process. In the case of Lu2O3 oxide, a new specific route was proposed. Crystallite dimensions were determined by X-ray diffraction and transmission electron microscopy analyses. Morphologies were characterized using scanning electron microscopy. Specific surface areas were determined from Bnmauer-Emmett-Teller （BET） technique. Using infrared spectroscopy analyses, the conversion rates of CH4 or CO into CO2 were de- termined from the evolutions of CO2 vibrational band intensities, as a function of time and temperature. It was dearly established that, despite its low specific surface, the Lu2O3 oxide presented the highest capacity of conversion of CH4 or CO into CO2.展开更多
This study proposed obstacles in the brownfield development and analyzed 3 classical cases of brownfield development:German Ruhr Industrial Area,the American Automobile City and 798 Art Zone in China.Based on the comp...This study proposed obstacles in the brownfield development and analyzed 3 classical cases of brownfield development:German Ruhr Industrial Area,the American Automobile City and 798 Art Zone in China.Based on the comprehensive elaboration and evaluation of the driving factors,patterns,rehabilitation benefits,costs and prospects of brownfield development,its enlightenment on urban development of China was summarized from 4 perspectives:inhibiting urban sprawl,improving environmental quality of brownfield,promoting urban renewal and reserving cultural heritage.展开更多
The HA/β-TCP biphasic bioceramics stand out on researches in different areas of biomedical applications. These bioceramics with microporous microstructures also stand out in biomedical applications on controlled drug...The HA/β-TCP biphasic bioceramics stand out on researches in different areas of biomedical applications. These bioceramics with microporous microstructures also stand out in biomedical applications on controlled drug release. This study aimed at the synthesis of the biphasic HA/β-TCP powder, and at the elaboration and characterization of the microporous biphasic HA/β-TCP granular biomaterial. The microporous granular material was elaborated through the process of ceramic powder sieving (200 μm < d < 500 μm mesh sizes). The granular material was sintered at 1100°C/2 h, providing the microporous biphasic granular biomaterial. The drug loading in the biomaterial was performed through the high vacuum method. The results here presented are related to the synthesis method and elaboration of the biphasic biomaterial. The results obtained from the drug loading through the high vacuum method conducted the incorporation of the drug onto the surface and into the microporous granular biomaterial.展开更多
IN his 100-minute,13,000-character speech addressing the official commemoration of the 40th anniversary of reform and opening-up on December 18,2018,President Xi Jinping offered what is,to date,the most comprehensive ...IN his 100-minute,13,000-character speech addressing the official commemoration of the 40th anniversary of reform and opening-up on December 18,2018,President Xi Jinping offered what is,to date,the most comprehensive elaboration of the latest proposal for the 40-year-old cause to“start over.”展开更多
In this paper,we firstly describes problems in designing a syllabus for a course named software architecture,then presents the creation of the syllabus by applying Elaboration Theory of Instruction.Our actual teaching...In this paper,we firstly describes problems in designing a syllabus for a course named software architecture,then presents the creation of the syllabus by applying Elaboration Theory of Instruction.Our actual teaching practice by following the bottom-up,and iterative method in classroom presentations is also discussed.Finally a use case study in teaching this course is given.展开更多
The paper reported a comparative study of the methods of extraction of <span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;&qu...The paper reported a comparative study of the methods of extraction of <span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">vegetable fibres encountered in the literature;three main ones was chose, namely: combing, retting with pre-treatment of the bagasse in salt and distilled water,</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span><span><span style="font-family:;" "=""><span style="font-family:Verdana;">and Chemical extraction at three concentration levels of soda (2N, 1N, 0.1N) </span><span style="font-family:Verdana;">with pre-treatment of bagasse with salt water and distilled water. After extracting the fibres using these methods, it appeared that the natural methods (retting and combing) have a higher yield of around 70% compared to the</span><span style="font-family:Verdana;"> chemical method which has a low yield of around 40%. The fibres obtained by the chemical extraction method (1N-BPD) had the best characteristics</span></span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">.</span></span></span>展开更多
Due to their interesting properties, bamboo fibers are more and more used as reinforcements in polymer matrices as a substitute for synthetic fibers. For their future service life, it is important to understand their ...Due to their interesting properties, bamboo fibers are more and more used as reinforcements in polymer matrices as a substitute for synthetic fibers. For their future service life, it is important to understand their physical and mechanical behavior over time in order to control the aging phenomenon within this fiber. The paper analyzed the influence of the age of the bamboo thatch and the vertical position of the Bambusa vulgaris species cultivated in Cameroon on the physicomechanical properties of the fibers extracted from the thatch. Fibers were mechanically extracted from three bamboo culms aged respectively 3 years (BV3), 4 years (BV4) and 5 years (BV5). The culms were thus identified according to their number of ramifications, and were felled no abated for a total of three culms. A section of about one meter on each of the parts (lower part, middle part, upper part) of these three culms was made for the opposite technological studies. Each age was therefore represented by three portions of thatch, one from the upper part, one from the middle part and the last from the lower part of the thatch, all giving a total number of nine samples taken and marked BV3inf, BV3moy, BV3sup, BV4inf, BV4moy, BV4sup, BV5inf, BV5moy, BV5sup before handling in the laboratory. Physical (density, moisture absorption rate) and mechanical (tensile tests according to DIN EN ISO 13934-1, natural durability) characterizations were used to better understand the mechanisms of this influence. In view of all the results obtained, the fiber from the upper part of the 3-year-old thatch (BV3sup) is the one with the best characteristics and is recommended for a better elaboration of bamboo fiber composites: (Density: 0.83;Absorption rate 11.7%;Young’s modulus: 7.4 GPa;Maximal stress: 64.3 MPa;Elongation at rupture: 1.1;Loss of mass natural durability: 7.63%).展开更多
Listening strategy use is recognized as one key factor influencing English listening comprehension.The study involves three listening texts with three kinds of different pre-listening activities,namely,a copy of relat...Listening strategy use is recognized as one key factor influencing English listening comprehension.The study involves three listening texts with three kinds of different pre-listening activities,namely,a copy of related Key words;a related reading passage;an easier listening preview.And the study found out four listening strategies seemed to be specially affected by the prelistening activities,elaboration,fixation,directed attention and real-time assessment of input,and effective listeners’almost used two times of metacognitive strategies than that of less-effective listeners.展开更多
By means of producing and using TV teaching materials on chemical teaching,the authors have been exploring thecomprehensive reform in the curriculum system,the teaching content and the teaching methods of the subject ...By means of producing and using TV teaching materials on chemical teaching,the authors have been exploring thecomprehensive reform in the curriculum system,the teaching content and the teaching methods of the subject ofchemical education at higher normal universities.This paper takes the production of TV-teaching展开更多
A multi-function protecting forest system was planed and arranged elaborately for im-provement of the local ecological conditions and high economical benefit. The system in-cludes level farmland shelter belt network, ...A multi-function protecting forest system was planed and arranged elaborately for im-provement of the local ecological conditions and high economical benefit. The system in-cludes level farmland shelter belt network, hillside farmland shelter belt network, stereoscop-ic sparse-wood pasture, erosion control fuel forest, fast growing commercial forest, eco-nomical forest, salt-soda controlling project and salt-soda protecting forest on salt-sodaland, ect..展开更多
Turpan traditional residences are primitive green buildings adaptive to the climate, materials and geographical conditions of the arid regions. The environmental adaptability of local residences and the construction m...Turpan traditional residences are primitive green buildings adaptive to the climate, materials and geographical conditions of the arid regions. The environmental adaptability of local residences and the construction methods was elaborated to provide references for building new oasis settlements in the local area.展开更多
Based on the fire and meteorological data of forest and grassland in Inner Mongolia in recent 30 years,a forest and grassland fire risk grade forecast model is established,and a refined forest and grassland fire risk ...Based on the fire and meteorological data of forest and grassland in Inner Mongolia in recent 30 years,a forest and grassland fire risk grade forecast model is established,and a refined forest and grassland fire risk level forecast system based on smart grid is developed. The results show that predictors are determined about forest and grassland fire risk grade,such as precipitation,minimum relative humidity,maximum temperature,maximum wind speed,number of sunny or rainy days,and forest and grassland combustible stock. According to fire risk division conclusion,forest and grassland areas are divided into 5 forecast areas. By using discriminant analysis and weighted factor overlay method,an elaborate fire risk grade forecast model is established in different forecast areas of Inner Mongolia forest and grassland. By using smart grid forecast field data,an elaborate fire risk grade forecasting system is established for making fire risk grade forecast during 24,48 and 72 h.展开更多
文摘Hua Shou(1304-1386)styled himself Ying Ning Sheng.He was also known as Hua Boren.His ancestral home was in Xiang Town,Xu Prefecture(present Xuchang,Henan province).His birth place was Yizhen,Jiangsu province.Later he moved to Yuyao,Zhejiang province.He was one of the distinguished practitioners of the late Yuan and early Ming dynasties.His writings include Elaboration of the Fourteen Meridians(Shi Si Jing Fa Hui),Notes on Handwritten Copy of Basic Questions(Du Su Wen Chao),The Essentials for Physicians(Zhen Jia Shu Yao).
基金supported by the China 111 Project (B17005)the financial support received by the Parthenope University of Napoli under ‘‘Bando di sostegno alla ricerca individuale per il triennio 2015–2017."partly supported by the U.S.–Italy Fulbright Commission and Parthenope University through a Fulbright Scholar grant to Theodore Endreny
文摘Climate conditions play a crucial role in the survival of mountain communities, whose survival already critically depends on socioeconomic factors. In the case of montane areas that are prone to natural haz-ards, such as alpine slope failure and debris flows, climatic factors exert a major influence that should be considered when creating appropriate sustainable scenarios. In fact, it has been shown that climate change alters the availability of ecosystem services （ES）, thus increasing the risks of declining soil fertility and reduced water availability, as well as the loss of grassland, potential shifts in regulatory services （e.g., protection from natural hazards）, and cultural services. This study offers a preliminary discussion on a case study of a region in the Italian Alps that is experiencing increased extreme precipitation and erosion, and where an isolated and historically resilient community directly depends on a natural resource econ- omy. Preliminary results show that economic factors have influenced past population trends of the Novalesa community in the Piemonte Region in northwest Italy. However, the increasing number of rock fall and debris flow events, which are triggered by meteo-climatic factors, may further influence the livelihood and weflbeing of this community, and of other similar communities around the world, Therefore, environmental monitoring and data analysis will be important means of detecting trends in landscape and climate change and choosing appropriate planning options. Such analysis, in turn, would ensure the survival of about 10% of the global population, and would also represent a possibility for future economic development in critical areas prone to poverty conditions.
文摘The development and wide application of genetic transformation for cotton improvement are restrained by the unresolved problem of genotype dependence in regeneration in vitro.High embryogenic and regenerative potential have been obtained for limited number of Coker type genotypes。
文摘The aim of this study is to characterize physically and mechanically a polyester/fiber palm petiole composite material. This work made it possible to provide the local database of composite materials but also to develop agricultural waste. According to BSI 2782 standard three formulations [A (10% fiber, 90% polyester);B (20% fiber, 80% polyester) and C (30% fiber, 70% po</span><span style="font-family:Verdana;">lyester)]. Water Absorption rate, density, compressive and three points</span><span style="font-family:Verdana;"> bending tests are carried out on the samples obtained by the contact molding method for each formulation. The material composite obtained by adding fibers from palm oil petiole has a density of 17.98% lower than the one made of pure polyester. Fiber reinforcement rate has no impact on the density of the composite. Formulation A most absorbs water while formulation C has good tensile/compression characteristics and the greatest breaking stress in bending among the three formulations.
文摘We present in this work how to use the dura palm kernel shell powders as loads for the elaboration by extrusion of PVC tubes. The transformation of dura palm kernel shells into micronized shell powder as well as its characterization was the subject of recent work. We carried out, the formulations by using the industrial scales of precision, the mixtures of the instrants with an industrial machine of mark HENSHLLE N˚2 MAIN 570762, the routine tests by ATG/DSC then by IRTF, the extrusion of the tubes with an extruder twin-screw with 9 rooms of transformation finally the tests of conformity by the observations and the analyses. We obtained for the formulations the dosage of 0%, 4.01%, 12.54%, 23.03%, 32.01%, 38.01%, 51.02% representing the percentage of hull powder in the mixture, the machine mixing gave perfectly homogeneous powders, the routine tests showed that the hull powder keeps all its properties until the end of the shaping whatever the percentage of hulls contained in the PVC, the extrusion gave tubes for each formulation and the conformity tests gave perfectly round tubes of diameter 90 × 82 mm, a coloration going from white grey at 0% to dark black at 51.02% showing the influence of the carbon black and the color of the shell powder according to its proportion. The infrared of the tubes obtained shows for each formulation a variation of the CH<sub>2</sub> and CH bonds and a decrease of the −OH bonds. The thermogravimetric analyses and the differential calorimetric analyses of the tubes of each formulation, show each time that the quantity of shell powders in the mixture influences the PVC tubes obtained. Thus, we obtain a variation of the phase temperatures according to the dosage, giving from 108.72<span style="white-space:normal;">˚</span>C to 76.56<span style="white-space:normal;">˚</span>C for the glass transition temperature and from 494.71<span style="white-space:normal;">˚</span>C to 414.56<span style="white-space:normal;">˚</span>C for the melting temperature, at the DSC and a progressive decrease of the mass following the heat absorption with each time 4 phases instead of 5 for the unloaded PVC tubes at the ATG according to the dosage.
基金supported in part by the National Natural Science Foundation of China under Grants 61973065,U20A20197,61973063.
文摘Previous multi-view 3D human pose estimation methods neither correlate different human joints in each view nor model learnable correlations between the same joints in different views explicitly,meaning that skeleton structure information is not utilized and multi-view pose information is not completely fused.Moreover,existing graph convolutional operations do not consider the specificity of different joints and different views of pose information when processing skeleton graphs,making the correlation weights between nodes in the graph and their neighborhood nodes shared.Existing Graph Convolutional Networks(GCNs)cannot extract global and deeplevel skeleton structure information and view correlations efficiently.To solve these problems,pre-estimated multiview 2D poses are designed as a multi-view skeleton graph to fuse skeleton priors and view correlations explicitly to process occlusion problem,with the skeleton-edge and symmetry-edge representing the structure correlations between adjacent joints in each viewof skeleton graph and the view-edge representing the view correlations between the same joints in different views.To make graph convolution operation mine elaborate and sufficient skeleton structure information and view correlations,different correlation weights are assigned to different categories of neighborhood nodes and further assigned to each node in the graph.Based on the graph convolution operation proposed above,a Residual Graph Convolution(RGC)module is designed as the basic module to be combined with the simplified Hourglass architecture to construct the Hourglass-GCN as our 3D pose estimation network.Hourglass-GCNwith a symmetrical and concise architecture processes three scales ofmulti-viewskeleton graphs to extract local-to-global scale and shallow-to-deep level skeleton features efficiently.Experimental results on common large 3D pose dataset Human3.6M and MPI-INF-3DHP show that Hourglass-GCN outperforms some excellent methods in 3D pose estimation accuracy.
文摘Pun,as a figure of speech applied in advertisements,can make the advertisements more vivid and indelible by adding attraction and humor,stimulating consumers' purchasing desire.Based on the elaboration of puns in English advertisements from the cognitive perspective,this paper attempts to analyze those puns under the guidance of relevant cognitive theoretical framework such as figure/ground theory,prominence view and conceptual blending theory.It also aims to explore the human cognitive activities involved in creation and understanding of advertising language.
基金Project supported by the Provence-Alpes-Còte d'Azur Regional Councilthe General Council of Varthe agglomeration community of Toulon Provence Mediterranean(ARCUS CERES,2008-2010)
文摘A comparative study of reactivity between air-CH4 or air-CO gas flows and CeO2, La2O3 and Lu2O3 rare earth oxides was per- formed using Fourier transform infrared spectroscopy analyses of CO2 gas resulted from the conversion of CH4 or CO gases. Polyerystalline samples of CeO2, La2O3 and Lu2O3 were first prepared by specific precipitation methods followed by low temperature calcination process. In the case of Lu2O3 oxide, a new specific route was proposed. Crystallite dimensions were determined by X-ray diffraction and transmission electron microscopy analyses. Morphologies were characterized using scanning electron microscopy. Specific surface areas were determined from Bnmauer-Emmett-Teller （BET） technique. Using infrared spectroscopy analyses, the conversion rates of CH4 or CO into CO2 were de- termined from the evolutions of CO2 vibrational band intensities, as a function of time and temperature. It was dearly established that, despite its low specific surface, the Lu2O3 oxide presented the highest capacity of conversion of CH4 or CO into CO2.
文摘This study proposed obstacles in the brownfield development and analyzed 3 classical cases of brownfield development:German Ruhr Industrial Area,the American Automobile City and 798 Art Zone in China.Based on the comprehensive elaboration and evaluation of the driving factors,patterns,rehabilitation benefits,costs and prospects of brownfield development,its enlightenment on urban development of China was summarized from 4 perspectives:inhibiting urban sprawl,improving environmental quality of brownfield,promoting urban renewal and reserving cultural heritage.
文摘The HA/β-TCP biphasic bioceramics stand out on researches in different areas of biomedical applications. These bioceramics with microporous microstructures also stand out in biomedical applications on controlled drug release. This study aimed at the synthesis of the biphasic HA/β-TCP powder, and at the elaboration and characterization of the microporous biphasic HA/β-TCP granular biomaterial. The microporous granular material was elaborated through the process of ceramic powder sieving (200 μm < d < 500 μm mesh sizes). The granular material was sintered at 1100°C/2 h, providing the microporous biphasic granular biomaterial. The drug loading in the biomaterial was performed through the high vacuum method. The results here presented are related to the synthesis method and elaboration of the biphasic biomaterial. The results obtained from the drug loading through the high vacuum method conducted the incorporation of the drug onto the surface and into the microporous granular biomaterial.
文摘IN his 100-minute,13,000-character speech addressing the official commemoration of the 40th anniversary of reform and opening-up on December 18,2018,President Xi Jinping offered what is,to date,the most comprehensive elaboration of the latest proposal for the 40-year-old cause to“start over.”
文摘In this paper,we firstly describes problems in designing a syllabus for a course named software architecture,then presents the creation of the syllabus by applying Elaboration Theory of Instruction.Our actual teaching practice by following the bottom-up,and iterative method in classroom presentations is also discussed.Finally a use case study in teaching this course is given.
文摘The paper reported a comparative study of the methods of extraction of <span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">vegetable fibres encountered in the literature;three main ones was chose, namely: combing, retting with pre-treatment of the bagasse in salt and distilled water,</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span><span><span style="font-family:;" "=""><span style="font-family:Verdana;">and Chemical extraction at three concentration levels of soda (2N, 1N, 0.1N) </span><span style="font-family:Verdana;">with pre-treatment of bagasse with salt water and distilled water. After extracting the fibres using these methods, it appeared that the natural methods (retting and combing) have a higher yield of around 70% compared to the</span><span style="font-family:Verdana;"> chemical method which has a low yield of around 40%. The fibres obtained by the chemical extraction method (1N-BPD) had the best characteristics</span></span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">.</span></span></span>
文摘Due to their interesting properties, bamboo fibers are more and more used as reinforcements in polymer matrices as a substitute for synthetic fibers. For their future service life, it is important to understand their physical and mechanical behavior over time in order to control the aging phenomenon within this fiber. The paper analyzed the influence of the age of the bamboo thatch and the vertical position of the Bambusa vulgaris species cultivated in Cameroon on the physicomechanical properties of the fibers extracted from the thatch. Fibers were mechanically extracted from three bamboo culms aged respectively 3 years (BV3), 4 years (BV4) and 5 years (BV5). The culms were thus identified according to their number of ramifications, and were felled no abated for a total of three culms. A section of about one meter on each of the parts (lower part, middle part, upper part) of these three culms was made for the opposite technological studies. Each age was therefore represented by three portions of thatch, one from the upper part, one from the middle part and the last from the lower part of the thatch, all giving a total number of nine samples taken and marked BV3inf, BV3moy, BV3sup, BV4inf, BV4moy, BV4sup, BV5inf, BV5moy, BV5sup before handling in the laboratory. Physical (density, moisture absorption rate) and mechanical (tensile tests according to DIN EN ISO 13934-1, natural durability) characterizations were used to better understand the mechanisms of this influence. In view of all the results obtained, the fiber from the upper part of the 3-year-old thatch (BV3sup) is the one with the best characteristics and is recommended for a better elaboration of bamboo fiber composites: (Density: 0.83;Absorption rate 11.7%;Young’s modulus: 7.4 GPa;Maximal stress: 64.3 MPa;Elongation at rupture: 1.1;Loss of mass natural durability: 7.63%).
文摘Listening strategy use is recognized as one key factor influencing English listening comprehension.The study involves three listening texts with three kinds of different pre-listening activities,namely,a copy of related Key words;a related reading passage;an easier listening preview.And the study found out four listening strategies seemed to be specially affected by the prelistening activities,elaboration,fixation,directed attention and real-time assessment of input,and effective listeners’almost used two times of metacognitive strategies than that of less-effective listeners.
文摘By means of producing and using TV teaching materials on chemical teaching,the authors have been exploring thecomprehensive reform in the curriculum system,the teaching content and the teaching methods of the subject ofchemical education at higher normal universities.This paper takes the production of TV-teaching
文摘A multi-function protecting forest system was planed and arranged elaborately for im-provement of the local ecological conditions and high economical benefit. The system in-cludes level farmland shelter belt network, hillside farmland shelter belt network, stereoscop-ic sparse-wood pasture, erosion control fuel forest, fast growing commercial forest, eco-nomical forest, salt-soda controlling project and salt-soda protecting forest on salt-sodaland, ect..
基金Sponsored by National Natural Science Foundation of China(51668058)
文摘Turpan traditional residences are primitive green buildings adaptive to the climate, materials and geographical conditions of the arid regions. The environmental adaptability of local residences and the construction methods was elaborated to provide references for building new oasis settlements in the local area.
基金Supported by Scientific and Technological Project of Inner Mongolia Autonomous Region (2020GG0016)。
文摘Based on the fire and meteorological data of forest and grassland in Inner Mongolia in recent 30 years,a forest and grassland fire risk grade forecast model is established,and a refined forest and grassland fire risk level forecast system based on smart grid is developed. The results show that predictors are determined about forest and grassland fire risk grade,such as precipitation,minimum relative humidity,maximum temperature,maximum wind speed,number of sunny or rainy days,and forest and grassland combustible stock. According to fire risk division conclusion,forest and grassland areas are divided into 5 forecast areas. By using discriminant analysis and weighted factor overlay method,an elaborate fire risk grade forecast model is established in different forecast areas of Inner Mongolia forest and grassland. By using smart grid forecast field data,an elaborate fire risk grade forecasting system is established for making fire risk grade forecast during 24,48 and 72 h.
