Two-oriented agriculture was a complex organism coupling production,economics,society and ecology.Its development process was affected by various factors such as producers,nature,society,etc.In order to overcome measu...Two-oriented agriculture was a complex organism coupling production,economics,society and ecology.Its development process was affected by various factors such as producers,nature,society,etc.In order to overcome measurement error of traditional data envelopment analysis caused by ignoring random,three-stage DEA model was studied to remove environmental factors and random effects.On the foundation of this model was two-oriented agriculture comprehensive production efficiency of 14 cities were estimated in Hunan Province in 2008,and brown forth corresponding policy proposals to promote agricultural development.展开更多
To consider the bending collapse of the pipes in the latticed frames, based on the multi-scale simulation, the collapsed parts of the pipe are meshed by the shell elements as micro-scaled models, and the other parts a...To consider the bending collapse of the pipes in the latticed frames, based on the multi-scale simulation, the collapsed parts of the pipe are meshed by the shell elements as micro-scaled models, and the other parts are meshed by beam elements macro-models. The incremental displacement constraint equations for the nodes on the section between the two models are established based on the plane section premise of classical beam theory. The method to introduce the constraint equations is derived based on the Updated Largrangian method. The location of the micro-model is predicted by the stress field of the beam element, and the length of the collapsed part is adjusted by the plastic energy in the micro model. Several examples are included to illustrate the efficiency and accuracy of this method.展开更多
Allium tuberosum Roxb is very popular for its function of stomach-strengthening,spirit-freshening,yang-warming and kidney essencereplenishing,however,its seeds appear to low bud,irregular sapling and other side effect...Allium tuberosum Roxb is very popular for its function of stomach-strengthening,spirit-freshening,yang-warming and kidney essencereplenishing,however,its seeds appear to low bud,irregular sapling and other side effects,which result in low yield and poor quality.This paper analyzed effects of PEG6000 concentration on budding percentage in detail.It comes to conclusions that budding percentage of No.1 seed increases from 71% to 92% on the basis of 36 h treatment by 20% PEG6000 and 24 h water-drying,that of No.3 seed ranges from 30.4% to 53.4% on the basis of the same treatment by 10% PEG6000.展开更多
Two single-storey single-span reinforcement concrete (RC) frame structures strengthened with Y-eccentrically brace were designed and manufactured to be 1/3 scale. The pseudo-dynamic testing method was used to study ...Two single-storey single-span reinforcement concrete (RC) frame structures strengthened with Y-eccentrically brace were designed and manufactured to be 1/3 scale. The pseudo-dynamic testing method was used to study the mechanical characteristics and the seismic performance under E1-Centro earthquake action with different peak acceleration adjusted by China's Code for Seismic Design of Buildings. The test results indicate that RC frame structures strengthened with Y- eccentrically steel brace present perfect seismic performance under strong earthquake action owing to the good ductility, strong bearing capability and fine energy absorbing capability provided by energy dissipation element and high lateral stiffness provided by diagonal braces. The seismic performance is also affected by the length of outsourcing steel at the joint between energy dissipation element of eccentric steel brace and RC frame beam. The joint should be considerably designed to make sure that shear failure can firstly occur in energy dissipation element.展开更多
With rapid development of the construction industry in China, lots of construction materials are being widely reused. Meanwhile, more and more materials for building remover or demolition enter into the environment as...With rapid development of the construction industry in China, lots of construction materials are being widely reused. Meanwhile, more and more materials for building remover or demolition enter into the environment as a result. However, China is facing big building garbage pollution, with simple disposal methods and low efficiency, which urgently needs to be improved. The paper takes Chongqing as an example to illustrate existing problems in this field and then puts forward corresponding countermeasures from the aspects of economy, technology, management and policy, aiming at enhancing the level of construction waste disposal in China.展开更多
In this paper, we study the quality of service requirement and guaranteed-rate scheduling problem for combined-input-crosspoint-queued (CICQ) switches. Using crosspoint buffers between input queues and output ports, t...In this paper, we study the quality of service requirement and guaranteed-rate scheduling problem for combined-input-crosspoint-queued (CICQ) switches. Using crosspoint buffers between input queues and output ports, the input and output scheduling can be decoupled in CICQ switches. Here we propose a new guaranteed-rate scheduling algorithm which is divided seperately into input and output scheduling. Simulation results show that our algorithm can perform better than existing scheduling schemes in both packet loss and jitter control.展开更多
Lignocellulosic biomass, being treated only with ammonia, treated with ammonia and then autoclaved, and treated with white-rot fungi after being mechanically chipped, were carried out to access the effects of lignocel...Lignocellulosic biomass, being treated only with ammonia, treated with ammonia and then autoclaved, and treated with white-rot fungi after being mechanically chipped, were carried out to access the effects of lignocellulose degradation by white-rot fimgi cultured on rapeseed straw. Fourier transform infrared spectroscopic analysis was used to show that the white-rot fungus Bjerkandera sp. strain increase the susceptibility of straw to enzymatic saccharification by modifying the lignin component, revealing the effect of these pretreatments on enzymatic saccharification. Reducing sugar production from straws pretreated by ammonia/mechanical chipping/fungi degradation was 29.80% higher than the samples treated with ammonia/autoclaving, indicating an effective degradation of phenolic compounds. After ammonia pretreatment 41% of the straw was converted to RS (reducing sugars) (glucose 50%). After 5 weeks pretreatment with the white-rot fungus, 54.8% of rapeseed straw was further converted to RS, 74% of which was glucose; while only 12% of the control straw was converted (glucose 42%). The white-rot fungus Bjerkandera sp. strain degraded rapeseed straw preferentially at the early stage (before 20 d), and the degradation selectivity was 0.181 1 (cellulose), 0.364 1 (hemicellulose), and 0.454 8 (lignin), suggesting that removal of the phenolic barriers enhanced reducing sugar yield, and the efficiency of fungal pretreatment was comparable with that after alkali treatment, resulting a higher proportion of glucose in the hydrolysates.展开更多
Amorphous alloy Mg1.8Cu0.2Ni was successfully prepared by mechanical alloying (MA) and a series of (n-x)Ni- x(Ti+B) composites were synthesized by MA. The electrochemical properties of Mgl.8Cu0.2Ni coated by Ni...Amorphous alloy Mg1.8Cu0.2Ni was successfully prepared by mechanical alloying (MA) and a series of (n-x)Ni- x(Ti+B) composites were synthesized by MA. The electrochemical properties of Mgl.8Cu0.2Ni coated by Ni, Ti and B were studied by cyclic charge-discharge, linear polarization curve, and hydrogen diffusion coefficient experiments. Experimental results indicate that Mg1.8Cu0.2Ni-[0.9Ni0.6(Ti+B)] composite which was MA 30 h exhibited the best performance and its initial discharge capacity arrived to 714.1 mAh/g. After 30 cycles the discharge capacity was above 530 mAh/g, which was much higher than that of Mg1.8Cu0.2Ni. And after 100 cycles it holded still 442.1 mAh/g. On all accounts, after modification by Ni, Ti and B, the initial discharge capacity and high-rate discharge ability of the electrode were evidently increased. At the same time, the cycle performance was also improved significantly.展开更多
The foundation of the ultrasonic non-destructive determination of stresses in near-the-surface layers of solids is presented. The method is based on the regularities of Rayleigh wave propagation in solids with initial...The foundation of the ultrasonic non-destructive determination of stresses in near-the-surface layers of solids is presented. The method is based on the regularities of Rayleigh wave propagation in solids with initial (residual) stresses. A description of the above mentioned method and examples of stress determination are presented. Examples are considered as applied to the residual stresses arising at electric welding and the operating stresses arising at loading.展开更多
Indium selenide (InSe) thin films have been prepared by e-beam technique onto glass substrate at a pressure of-8 × 10^-5 Pa. The deposition rate of the InSe thin films is -8.30 nms^-1. InSe samples grown at roo...Indium selenide (InSe) thin films have been prepared by e-beam technique onto glass substrate at a pressure of-8 × 10^-5 Pa. The deposition rate of the InSe thin films is -8.30 nms^-1. InSe samples grown at room temperature have been termed as virgin, whereas the films at which the transition in electrical conductivity is shown to exhibit at a temperature of 415 to 455 K have been termed as phase-transited samples. X-ray diffraction (XRD) study reveals that lnSe thin films are amorphous in nature before phase-transition while they are polycrystalline after phase-transition. Scanning electron microscopy (SEM) has been used to study the surface morphology of InSe thin films. Before phase-transition grains are absent in the films and surfaces are almost smooth and uniform. Film surfaces are seen to exhibit a number of grains after phase-transition and they are rough in surfaces. The elemental composition of the lnSe thin films has been estimated by EDAX method. The effects of temperature on the electrical properties of InSe thin films have been studied in details. Temperature dependence of electrical conductivity shows a semiconducting behavior with activation energy. Thickness dependence of conductivity is well in conformity with the Fuchs-Sondheimer theory. Thermopower study indicates that the InSe film is an n-type semiconductor. The optical study of InSe thin films is carried out in the wavelength range 360 to 1100 nm at room temperature. The study of absorption coefficient of InSe thin films shows a direct type transition with a band gap of=1.65 eV which is well agreed with the reported values. Integrated values of luminous and solar transmittance as well as of reflectance have been calculated. Appreciable order of transmittance and reflectance suggest that this material is a potential candidate for the application in selective surface devices.展开更多
GENERAL INFORMATIONWorld Journal of Gastroenterology (World J Gastroenterol ISSN 1007-9327 CN 14-1219/R) is a weekly open access (OA) peer-reviewed journal supported by an editorial board consisting of 1179 expert...GENERAL INFORMATIONWorld Journal of Gastroenterology (World J Gastroenterol ISSN 1007-9327 CN 14-1219/R) is a weekly open access (OA) peer-reviewed journal supported by an editorial board consisting of 1179 experts in gastroenterology and hepatology from 60 countries.展开更多
Many reviewers have contributed their expertise and time to the peer review, a critical process to ensure the quality of WorM Journal of Gastroenterology. The editors and authors of the articles submitted to the journ...Many reviewers have contributed their expertise and time to the peer review, a critical process to ensure the quality of WorM Journal of Gastroenterology. The editors and authors of the articles submitted to the journal are gratefial to the following reviewers for evaluating the articles (including those published in this issue and those rejected for this issue) during the last editing time period.展开更多
GENERAL INFORMATIONWorld Journal of Gastroenterology (World J Gastroenterol ISSN 1007-9327 CN 14-1219/R) is a weekly open-access (OA) peer-reviewed iournal supported by an editorial board consisting of 1179 expert...GENERAL INFORMATIONWorld Journal of Gastroenterology (World J Gastroenterol ISSN 1007-9327 CN 14-1219/R) is a weekly open-access (OA) peer-reviewed iournal supported by an editorial board consisting of 1179 experts in gastroenterology and hepatology from 60 countries. The biggest advantage of the OA model is that it provides free, fi.flltext articles in PDF and other formats for experts and the public without registration, which eliminates the obstacle that traditional journals possess and usually delays the speed of the propagation and communication of scientific research results. The open access model has been proven to be a true approach that may achieve the ultimate goal of the journals, i.e. the maximization of the value to the readers, authors and society.展开更多
Dielectric resonators are key components in many microwave and millimetre wave circuits and applications, including high-Q filters and frequency-determining elements for precision frequency synthesis. Multilayered and...Dielectric resonators are key components in many microwave and millimetre wave circuits and applications, including high-Q filters and frequency-determining elements for precision frequency synthesis. Multilayered and bulk low-loss single crystal and polycrystalline dielectric structures have become very important for designing these devices. Proper design requires careful electromagnetic characterisation of low-loss material properties. This includes exact simulation with precision numerical software and precise measurements of resonant modes. For example, we have developed the Whispering Gallery mode technique, which has now become the standard for characterizing low-loss structures. This paper will review some of the common characterisation techniques used in the microwave to millimetre wave frequency regime.展开更多
文摘Two-oriented agriculture was a complex organism coupling production,economics,society and ecology.Its development process was affected by various factors such as producers,nature,society,etc.In order to overcome measurement error of traditional data envelopment analysis caused by ignoring random,three-stage DEA model was studied to remove environmental factors and random effects.On the foundation of this model was two-oriented agriculture comprehensive production efficiency of 14 cities were estimated in Hunan Province in 2008,and brown forth corresponding policy proposals to promote agricultural development.
基金Funded by the Key Science and Technology Project of State Grid Corporation of China under Grant No.GC-10-1006
文摘To consider the bending collapse of the pipes in the latticed frames, based on the multi-scale simulation, the collapsed parts of the pipe are meshed by the shell elements as micro-scaled models, and the other parts are meshed by beam elements macro-models. The incremental displacement constraint equations for the nodes on the section between the two models are established based on the plane section premise of classical beam theory. The method to introduce the constraint equations is derived based on the Updated Largrangian method. The location of the micro-model is predicted by the stress field of the beam element, and the length of the collapsed part is adjusted by the plastic energy in the micro model. Several examples are included to illustrate the efficiency and accuracy of this method.
文摘Allium tuberosum Roxb is very popular for its function of stomach-strengthening,spirit-freshening,yang-warming and kidney essencereplenishing,however,its seeds appear to low bud,irregular sapling and other side effects,which result in low yield and poor quality.This paper analyzed effects of PEG6000 concentration on budding percentage in detail.It comes to conclusions that budding percentage of No.1 seed increases from 71% to 92% on the basis of 36 h treatment by 20% PEG6000 and 24 h water-drying,that of No.3 seed ranges from 30.4% to 53.4% on the basis of the same treatment by 10% PEG6000.
基金Funded by National Natural Science Foundation of China (Grant No. 51078248)the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
文摘Two single-storey single-span reinforcement concrete (RC) frame structures strengthened with Y-eccentrically brace were designed and manufactured to be 1/3 scale. The pseudo-dynamic testing method was used to study the mechanical characteristics and the seismic performance under E1-Centro earthquake action with different peak acceleration adjusted by China's Code for Seismic Design of Buildings. The test results indicate that RC frame structures strengthened with Y- eccentrically steel brace present perfect seismic performance under strong earthquake action owing to the good ductility, strong bearing capability and fine energy absorbing capability provided by energy dissipation element and high lateral stiffness provided by diagonal braces. The seismic performance is also affected by the length of outsourcing steel at the joint between energy dissipation element of eccentric steel brace and RC frame beam. The joint should be considerably designed to make sure that shear failure can firstly occur in energy dissipation element.
基金Funded by 2011 Construction Science and Technology Project of Chongqing Municipal Commission of Urban-Rural Development(No.2011-1-8)
文摘With rapid development of the construction industry in China, lots of construction materials are being widely reused. Meanwhile, more and more materials for building remover or demolition enter into the environment as a result. However, China is facing big building garbage pollution, with simple disposal methods and low efficiency, which urgently needs to be improved. The paper takes Chongqing as an example to illustrate existing problems in this field and then puts forward corresponding countermeasures from the aspects of economy, technology, management and policy, aiming at enhancing the level of construction waste disposal in China.
基金Funded by The National High Technology Research and Development Program of China(863 Program)under Grant No.2005AA121410
文摘In this paper, we study the quality of service requirement and guaranteed-rate scheduling problem for combined-input-crosspoint-queued (CICQ) switches. Using crosspoint buffers between input queues and output ports, the input and output scheduling can be decoupled in CICQ switches. Here we propose a new guaranteed-rate scheduling algorithm which is divided seperately into input and output scheduling. Simulation results show that our algorithm can perform better than existing scheduling schemes in both packet loss and jitter control.
基金supported by the New & Renewable Energy of the Korea Institute of Energy Technology Evaluation and Planning(KETEP)Grant Funded by the Korea Government Ministry of Knowledge Economy(No.20103020090020)
文摘Lignocellulosic biomass, being treated only with ammonia, treated with ammonia and then autoclaved, and treated with white-rot fungi after being mechanically chipped, were carried out to access the effects of lignocellulose degradation by white-rot fimgi cultured on rapeseed straw. Fourier transform infrared spectroscopic analysis was used to show that the white-rot fungus Bjerkandera sp. strain increase the susceptibility of straw to enzymatic saccharification by modifying the lignin component, revealing the effect of these pretreatments on enzymatic saccharification. Reducing sugar production from straws pretreated by ammonia/mechanical chipping/fungi degradation was 29.80% higher than the samples treated with ammonia/autoclaving, indicating an effective degradation of phenolic compounds. After ammonia pretreatment 41% of the straw was converted to RS (reducing sugars) (glucose 50%). After 5 weeks pretreatment with the white-rot fungus, 54.8% of rapeseed straw was further converted to RS, 74% of which was glucose; while only 12% of the control straw was converted (glucose 42%). The white-rot fungus Bjerkandera sp. strain degraded rapeseed straw preferentially at the early stage (before 20 d), and the degradation selectivity was 0.181 1 (cellulose), 0.364 1 (hemicellulose), and 0.454 8 (lignin), suggesting that removal of the phenolic barriers enhanced reducing sugar yield, and the efficiency of fungal pretreatment was comparable with that after alkali treatment, resulting a higher proportion of glucose in the hydrolysates.
文摘Amorphous alloy Mg1.8Cu0.2Ni was successfully prepared by mechanical alloying (MA) and a series of (n-x)Ni- x(Ti+B) composites were synthesized by MA. The electrochemical properties of Mgl.8Cu0.2Ni coated by Ni, Ti and B were studied by cyclic charge-discharge, linear polarization curve, and hydrogen diffusion coefficient experiments. Experimental results indicate that Mg1.8Cu0.2Ni-[0.9Ni0.6(Ti+B)] composite which was MA 30 h exhibited the best performance and its initial discharge capacity arrived to 714.1 mAh/g. After 30 cycles the discharge capacity was above 530 mAh/g, which was much higher than that of Mg1.8Cu0.2Ni. And after 100 cycles it holded still 442.1 mAh/g. On all accounts, after modification by Ni, Ti and B, the initial discharge capacity and high-rate discharge ability of the electrode were evidently increased. At the same time, the cycle performance was also improved significantly.
文摘The foundation of the ultrasonic non-destructive determination of stresses in near-the-surface layers of solids is presented. The method is based on the regularities of Rayleigh wave propagation in solids with initial (residual) stresses. A description of the above mentioned method and examples of stress determination are presented. Examples are considered as applied to the residual stresses arising at electric welding and the operating stresses arising at loading.
文摘Indium selenide (InSe) thin films have been prepared by e-beam technique onto glass substrate at a pressure of-8 × 10^-5 Pa. The deposition rate of the InSe thin films is -8.30 nms^-1. InSe samples grown at room temperature have been termed as virgin, whereas the films at which the transition in electrical conductivity is shown to exhibit at a temperature of 415 to 455 K have been termed as phase-transited samples. X-ray diffraction (XRD) study reveals that lnSe thin films are amorphous in nature before phase-transition while they are polycrystalline after phase-transition. Scanning electron microscopy (SEM) has been used to study the surface morphology of InSe thin films. Before phase-transition grains are absent in the films and surfaces are almost smooth and uniform. Film surfaces are seen to exhibit a number of grains after phase-transition and they are rough in surfaces. The elemental composition of the lnSe thin films has been estimated by EDAX method. The effects of temperature on the electrical properties of InSe thin films have been studied in details. Temperature dependence of electrical conductivity shows a semiconducting behavior with activation energy. Thickness dependence of conductivity is well in conformity with the Fuchs-Sondheimer theory. Thermopower study indicates that the InSe film is an n-type semiconductor. The optical study of InSe thin films is carried out in the wavelength range 360 to 1100 nm at room temperature. The study of absorption coefficient of InSe thin films shows a direct type transition with a band gap of=1.65 eV which is well agreed with the reported values. Integrated values of luminous and solar transmittance as well as of reflectance have been calculated. Appreciable order of transmittance and reflectance suggest that this material is a potential candidate for the application in selective surface devices.
文摘GENERAL INFORMATIONWorld Journal of Gastroenterology (World J Gastroenterol ISSN 1007-9327 CN 14-1219/R) is a weekly open access (OA) peer-reviewed journal supported by an editorial board consisting of 1179 experts in gastroenterology and hepatology from 60 countries.
文摘Many reviewers have contributed their expertise and time to the peer review, a critical process to ensure the quality of WorM Journal of Gastroenterology. The editors and authors of the articles submitted to the journal are gratefial to the following reviewers for evaluating the articles (including those published in this issue and those rejected for this issue) during the last editing time period.
文摘GENERAL INFORMATIONWorld Journal of Gastroenterology (World J Gastroenterol ISSN 1007-9327 CN 14-1219/R) is a weekly open-access (OA) peer-reviewed iournal supported by an editorial board consisting of 1179 experts in gastroenterology and hepatology from 60 countries. The biggest advantage of the OA model is that it provides free, fi.flltext articles in PDF and other formats for experts and the public without registration, which eliminates the obstacle that traditional journals possess and usually delays the speed of the propagation and communication of scientific research results. The open access model has been proven to be a true approach that may achieve the ultimate goal of the journals, i.e. the maximization of the value to the readers, authors and society.
文摘Dielectric resonators are key components in many microwave and millimetre wave circuits and applications, including high-Q filters and frequency-determining elements for precision frequency synthesis. Multilayered and bulk low-loss single crystal and polycrystalline dielectric structures have become very important for designing these devices. Proper design requires careful electromagnetic characterisation of low-loss material properties. This includes exact simulation with precision numerical software and precise measurements of resonant modes. For example, we have developed the Whispering Gallery mode technique, which has now become the standard for characterizing low-loss structures. This paper will review some of the common characterisation techniques used in the microwave to millimetre wave frequency regime.