bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Investigation of Novel L-Glutamate-Based Schiff Base Compounds with Different Substituted Groups
Authors: Jiao Ti Feng , Liu Jian , Zhou Jing Xin , Li Xu Hui , Xing Yuan Yuan
Published: April 2011

Some novel L-glutamate-based Schiff base compounds with glutamate segment and different substituted groups have been designed and synthesized from the reaction of aromatic L-glutamate amine with different aldehydes. It has been found that depending on the molecular structures and substituted groups, the formed Schiff base compounds showed different properties, indicating distinct regulation of molecular design. UV and IR data confirmed commonly the formation of Schiff base as well as aromatic substituted groups in molecular structures. Thermal analysis also clarified the structural influence of these compounds in different temperature ranges. The difference of thermal stability is mainly attributed to molecular structures, formation of Schiff base group and different substituted groups. These results indicated that the the special properties of Schiff base compounds could be regulated through the design of molecular structures and substituted groups, which leads to potential application in fields of functional material as well as catalyst.
Application of Clarke-Wright Saving Mileage Heuristic Algorithm in Logistics Distribution Route Optimization
Authors: Sheng Yu Kui , Lan Wan Lian
Published: April 2011

The cost of logistics distribution takes account for considerable proportion in logistics costs. Logistic distribution route is of of vital importance to reduce logistics cost. Clarke-Wright Saving Mileage Heuristic Algorithm is an effective method to optimize distribution route.
Synthesis, Kinetics and Electrochemical Properties of a New Photochromic Diarylethene
Authors: Pu Shou Zhi , Wang Ren Jie , Xia Hong Ying , Liu Gang
Published: April 2011

A new unsymmetrical photochromic diarylethene [1-(2-methyl-5-(3-methoxyphenyl)-3-thienyl), 2-(2-methyl-3-benzothienyl)] perfluorocyclopentene (1a), was synthesized, and its photochromic properties such as photochromism, kinetics and electrochemical properties were investigated in detail. The results showed that the compound exhibited excellent photochromism both in solution and in PMMA film with alternating irradiation by UV/Vis light. The kinetic and electrochemical experiments indicated that the cyclization/cycloreversion process of the compound was determined to be the zeroth/first order reaction, and the electrochemcial switching property can be potential use for electrochemistry data storage. At last, using this dithienylethene as recording medium was performed successfully.
Study of Adsorbent Derived from Sewage Sludge Incineration Residue for the Removal of Ni2+ in Wastewater
Authors: Liu Jin Yong , Ning Xu Nan , Yang Zuo Yi
Published: April 2011

Sewage sludge incineration residue was obtained from a sewage treatment plant in Guangzhou and used as a low-cost sorbent for removing Ni2+ from wastewaters. The adsorption effectiveness and their factors of Ni2+ in aqueous solutions were simulated detailed using the adsorbents of the sludge incineration residue. The simulation contents and the factors included the adsorption time, the pH of solution and the dosage of adsorbents and so on. The results showed that at room temperature, the adsorption equilibrium of Ni2+ can be achieved in 6h and the best pH value of the solution was about 7.0. The removal rates of Ni2+ were increased with the adsorbent concentration increasing and the optimal concentration of adsorbent was 10g/L with the initial concentration of Ni2+ less than 30mg/L.At the best adsorption conditions, the removal rate of Ni2+ reached more than 70%.
Comparison Study on Two Energy Control Strategies of Plug-In Hybrid Electric Vehicle
Authors: Shi Qing Sheng , Zhang Xiao Ping , Wu Lan
Published: April 2011

It is of great importance to manage the energy split of plug-in hybrid electric vehicle during the driving process.In this paper, principle of energy control in plug-in hybrid electric vehicle was first presented. And then, two energy control strategies, including fuel control strategy and engine efficiency control strategy, were analyzed, respectively. Finally, comparision simulation experiments were carried on electric vehicle platform ADVISOR software. Simulation results show that, using fuel control strategy can get a better economy performance but worse engine efficiency; while using engine efficiency control strategy can get a better engine efficiency but higher fuel consumption.
Fault Tree Analysis of Centrifugal Compressor
Authors: Zhu Jin Fang
Published: April 2011

Centrifugal compressor is one of the most typical equipment of all rotary machinery equipment, which is used widely and largely in petrochemical settings. Thus it is necessary to study the reliability of centrifugal compressor. The fault tree has been introduced and applied to the practical facilities. The reliability of centrifugal compressor also has been analyzed. Qualitative analysis aims to find the minimum cut and calculate the failure probability of compressors.
Optoelectronic Properties and Holographic Optical Recording of a Unsymmetrical Diarylethene Having a Pyrrole Unit
Authors: Liu Gang , Liu Ming , Zhang Qing , Pu Shou Zhi , Liu Wei Jun
Published: April 2011

A unsymmetrical photochromic diarylethene, 1-[2-methyl-5-(3,4-difluorophenyl) -3-thienyl]-2- (2-cyano-1,5-dimethyl-4-pyrryl) perfluorocyclopentene (1o), was synthesized, and its optoelectronic properties were also investigated. The results showed that this compound exhibited reversible photochromism changing from colorless to blue after irradiation with UV light both in solution and in PMMA amorphous film. The open-ring isomer of the diarylethene 1 exhibited relatively strong fluorescence both in hexane solution. The fluorescence intensity decreased along with the photochromism upon irradiation with 297 nm light and its closed-ring isomer showed almost no fluorescence. Using diarylethene 1 as recording medium, polarization holographic optical recording was carried out successfully.
Calculation of Services Value for Grassland Ecosystem in HulunBuir City
Authors: Wang Rui Jie , Yang Lian Wei
Published: April 2011

Calculating the value of ecosystem services may improve economic efficiency and play an important role in protecting ecosystems.The grassland ecosystem of HulunBuir city is an important component of ecology security system in Northeast China and is the typical belt transect of International Geosphere Biosphere Programme global change study. In this study, net primary productivity (NPP), as an improtant ecological parameter, was used to estmate the services value. Considering the characteristic of satellite imagery, it is difficult to calculate some functions. So we calculated the services value from four aspects, including soil erosion control, water conservation, direct production and gas regulation. The total services value of grassland ecosystem was estimated in RMB to be aproximately 18.47×109Yuan in 2006 (Chinese currency, 7.78 Yuan=US$1), the average economic value of unit area was 15.4×104Yuan/km2. The direct production value was 1.23×109Yuan/year; and the contribution rate to total value was 6.66%. Indirect services value was 17.24×109Yuan/year, and the contribution rate to total value was 93.34%. Indirect services value was far more than direct production value. For the indirect services value, the water regulation value was the maximum, 9.09×109Yuan/year. Gas regulation value was 5.25×109Yuan/year, contributing 28.42% to the total value.
Application of Dynamic Programming in Resources Optimization Allocation of Factory Production Line
Authors: Wen Jing Hua , Jiang He Ling , Zhang Mei , Yu Xi
Published: April 2011

The dynamic programming has significant implications for solving multi-stage decision of resource allocation problems. By inducting phase, state of variables and decision, the factory assembly line resource allocation problems was taken as a multi-stage decision process. The stage of resource allocation was divided in reason, and the dynamic programming equation was built with “Top-Down” ways to reverse recursion according to the dynamic programming principle and methods. Adopting the MATLAB7.0 as development platform, it was convenient for calculating optimal decision sequence and maximum total profits. Dynamic programming method has obvious effect in equipment resource allocation output issues, and brings in the biggest economic benefits in limited investment.
Thermodynamic Analysis of Refrigeration Cycle Performance with R125/R600a Mixtures
Authors: Wang Fang , Zhang Xian Ping , Wang Feng Kun , Fan Xiao Wei , Lian Zhi Wei
Published: April 2011

This paper deals with a thermodynamic analysis of a vapor compression refrigeration system with the new refrigerant R125/R600a blends, parameters and factors affecting the performance are investigated, and also a comparison with that of R22 is presented. Encouraging results are obtained, at a certain concentration of R125 in mixtures, the R125/R600a refrigerant blends perform better than R22 but with loss of volumetric cooling capacity in air conditioning applications. Which may provide useful information for alternative refrigerants.
Heating Performance of Zeotropic Mixture and Temperature Glide Matching with Secondary Fluid
Authors: Zhang Xian Ping , Wang Fang , Duan Huan Lin , Chen Ai Dong
Published: April 2011

In order to decrease the heat rejection pressure of pure CO2 refrigerating system and meanwhile have sustainable environmentally benefits for working fluild, several natural zeotropic CO2/Propane mixtures are applied to heat pump system to investigate the heating performance. The heat rejection pressure of CO2/Propane mixtures is reduced when the mass fraction of carbon dioxide is decreased. Under the given conditions, there is an optimum range of mass fraction of CO2/Propane of which the mixtures have superior heating coefficient of performance. The temperature glide characteristics of CO2/Propane mixtures at heating mode was also researched to analyze the heat transfer efficiency. Both a sufficient heat exchange area and a good working fluid’s temperature gradient matching with that of the secondary heat transfer fluid contribute to a higher heat transfer efficiency of heat exchanger.
The Analysis of Output Power of a Laser Diode Based on the Difference Method
Authors: Garidi Bu Yin , Yang Jiu Ru , Ye Hong An
Published: April 2011

It is an expedient and efficient method to simulate the output power characteristics of a laser diode through the numerical analysis. In this paper, firstly, based on the rate equations of the electrons transition in the active layer, the functions of some key parameters, such as internal quantum efficiency, threshold current and leakage current, etc., are defined with the variance of working temperature. And an accurate numerical analytical model is built by adopting the low-complexity difference method. Then, the simulated results are compared with the results from testing and Optiwave3.0 software. The results show that, by using the proposed analytical model, the simulation on the output power characteristics of a laser diode can be realized in all input current fields, which overcomes the drawbacks within the Optiwave3.0 software. At the same time, the mean deviation between the simulated results and testing results is reduced obviously, and the average error is only 3.88%.
Research on the Grey Assessment Method of Dam Failure Risk
Authors: Jiang Ying , Zhang Qiu Wen
Published: April 2011

The dam safety assessment is related with the national economy and the people’s livelihood all the world, so it is important and meaningful to research methods of protecting the safety of dam. The dam failure disaster risk is regarded as main researching object in this thesis. The theories and methods, such as knowledge of dam engineering, risk analysis, analytic hierarchy processing, grey theory and so on, are introduced into the thesis. This research performs relatively detailed study on methods of comprehensive risk assessment, synthesis assessment structure system, and method of measuring assessment index of the dam.
An Improved Noise Reduction Based on Wavelet Threshold
Authors: Xi Jian Hui , Chen Jia
Published: April 2011

Based on multi-resolution analysis of wavelet, this article is aimed at building a new soft threshold function for wavelet de-noising, to overcome the discontinuous disadvantage of the hard threshold function. In the area adjacent to the threshold, continuously adjustable nonlinear functions are introduced in piecewise to process the wavelet coefficients more carefully in this area. Consequently, large deviation caused by super-compression of wavelet coefficients when using traditional soft threshold could be avoided, and the nonlinearity of the system is able to be effectively kept. Using both signal to noise ratio (SNR) and mean square error (MSE) as the evaluation indicators, simulation results show that the improved method is more effective than the method based on traditional hard and soft threshold.
Influence of Excess Bi2O3 and Na2Co3 on Crystal Structure and Microstructure of Bismuth Sodium Titanate Ceramics
Authors: Sittiketkron Panadda , Klinbumrung Arrak , Bongkarn Theerachai
Published: April 2011

This study investigated the influence of excess Bi2O3 and Na2CO3 on the crystal structure, microstructure and dielectric properties of (Bi0.5Na0.5)TiO3 (BNT) ceramics. The BNT ceramics were synthesized using the solid-state reaction method with various excess Bi2O3 and Na2CO3 levels (0, 1, 2, 3 and 4 mol%). The X-ray characterization revealed that all samples had a rhombohedral structure. A pure perovskite phase was obtained in all samples. The lattice parameter a tended to increase with increased excess Bi2O3 and Na2CO3 content in the calcined powders and sintered ceramics. The average particle size increased while, the average grain size tended to decreased with increased of excess Bi2O3 and Na2CO3 content. The depolarization temperature (Td) and the Curie temperature (Tc) were slightly decreased with the increase of excess Bi2O3 and Na2CO3 content. The dielectric properties were related to the density.
A Method for Bouncing Compensation of Pre-Tensioned Frame in AGC Control System of Hydraulic Leveler
Authors: Hu Ying , Hao Xiao Hong , Huang Qing Xue , Wang Qiu Shu
Published: April 2011

For the frame characteristics of leveler and the leveler AGC control system requirements, this paper analyzed the structure of the frame. And using the finite element software ANSYS analyzed the stress distribution and deformation of leveler prestressedstand. Thus we can obtain the frame stiffness in different preload coefficient, and establish the corresponding AGC compensation model. All of this, the leveler control system can provide the precise compensation for frame bounce. Because of this, it improved the straightening precision, and achieved the lean straightening. Meanwhile, it can provide the feedback guarantee for the accurate correction of leveler model.
Synthesis and Characterization of ZnO Nanoparticles in the Method of Precipitation
Authors: Wang Li Qin , Yang Xiang Ni , Han Yang , Zhang Rui Jun , Yang Yu Lin
Published: April 2011

ZnO nanoparticles were synthesized in the method of precipitation, and they were characterized by the means of the transmission electron microscopy (TEM), the X-ray powder diffraction (XRD), the thermogravimetric analysis and differential thermal analysis (TG-DTA), and the Fourier transform infrared spectroscopy (FT-IR). Also their photocatalytic and degradation performance for the methyl orange aqueous solution were studied. The research results showed as-prepared ZnO nanoparticles were spherical crystals in hexagonal crystal system, and their size distribution was mainly in the range of 20-30 nm. The annealing temperature was about 390 °C, and a few organics remained, which may be helpful for the formation of ZnO particles. They had integrated crystal form, high crystallinity and thermal stability. Moreover, the obtained ZnO nanoparticles had excellent photocatalytic and degradation performance for the methyl orange aqueous solution. When reacted for 3.5 h, the degradation rate of the methyl orange aqueous solution was up to about 97%.
The Effects of MWTs Characteristics on User Satisfaction in Mobile Government Systems
Authors: Chen Zhen Jiao
Published: April 2011

Mobile and wireless technologies (MWTs), such as wireless laptop computers, personal digital assistants (PDA), mobile phones, smart phones, etc., have been widely used in our lives. Government agencies are using MWTs to enhance their managerial effectiveness and provide convenient service to citizens. Based on fairness theory, this study develops a typology of the characteristics of MWTs in m-Government systems: transparency-related MWTs characteristics, information accuracy-related MWTs characteristics and voice-related MWTs characteristics, and examine how the three categories of MWTs characteristics affect user satisfaction in mobile government systems.
Using Genetic Algorithm to Help the Seller Strategies in Online Auction
Authors: Tsai Ming Jyh , Huang Tien Yu
Published: April 2011

In e-commerce platform, the auction market is the most attractive channel for the general public. Because of low cost, making the entry barriers are low. Online sellers rely on the auction website as the platform. However, “What sellers should do to maximize the profit?” is the main purpose for this paper. This study used Apple ipod nano as an auction object on Yahoo!Auctions, and we came up with eleven factors as research variables , and tried to use genetic algorithm to build a successful auction model for sellers. In this research , if the results showed that the optimal seller behavior of chromosomes are 1,6,9,11 from the portfolio, it means that the seller need to provide product images, accept “Buy it now” , inform buyers about deliver time and maintain a good seller reputation. Therefore, the seller might be recommend to make efforts on the provision of product information, include pictures of auction goods and answer all detail questions, accept “Buy it now” , inform the buyers when sending out the goods, and maintain good reputation.
The Range Distribution of Er Ions Implanted in Silicon Crystal
Authors: Qin Xi Feng , Liang Yi , Wang Feng Xiang
Published: April 2011

Due to the need to reduce electronic device sizes, it is very important to consider the depth distribution of ions implanted into a crystalline target. The mean projected ranges and range straggling for energetic 150 – 500 keV Er ions implanted in single crystal silicon (c-Si) at room temperature were measured by means of Rutherford backscattering followed by spectrum analysis. The measured results are compared with other experimental data for amorphous Si (a-Si) and Monte Carlo code (SRIM2006) predictions. Our results show that, although the experimental values for range and range straggling exceed the SRIM calculations, they are nevertheless consistent with trends that have been previously observed for a-Si.
A Case Study of Distress Detection and Treatment of Loess Road Tunnel
Authors: Lai Jin Xing , Zhang Guang Long , Liu Xiao Wei
Published: April 2011

Based on the characteristic of distress in Qijia mountain road tunnel, thickness, cavity distribution, crevice water were detected with geo-radar. Material of lining was nondestructive detected with sound locater. Limiting structure of the tunnel was detected with circumscription apparatus. Based on detected results cause of the distress was analyzed. Three treatment schemes were put forward by slurry injection from the back of lining structure, reinforcement lining, treating the water proof system. Stability of surrounding rock and the state of forces of the lining structure were analyzed before and after treatment. It is showed that the treatment scheme of the tunnel is feasible. Taken construction and cost estimate into account, optimal scheme is obtained.
Multi-Objective Optimization of a Piezoelectric Sandwich Ultrasonic Transducer by Using Elitist Non-Dominated Sorting Genetic Algorithm
Authors: Fu Bo , Jing Yi , Fu Xuan , Hemsel Tobias
Published: April 2011

The multi-objective optimal design of a piezoelectric sandwich ultrasonic transducer is studied. The maximum vibration amplitude and the minimum electrical input power are considered as optimization objectives. Design variables involve continuous variables (dimensions of the transducer) and discrete variables (material types). Based on analytical models, the optimal design is formulated as a constrained multi-objective optimization problem. The optimization problem is then solved by using the elitist non-dominated sorting genetic algorithm (NSGA-II) and Pareto-optimal designs are obtained. The optimized results are analyzed and the preferred design is proposed. The optimization procedure presented in this contribution can be applied in multi-objective optimization problems of other piezoelectric transducers.
The Research of Scrub on the Performance of Diatomite
Authors: Chen Jun Tao , Han Yue Xin , Liu Lei , Zheng Shui Lin
Published: April 2011

The internal structure of diatomite has nanometer-level micropore and fine adsorptivity, but internal porosities of crude diatomite were blocked by impurities which should be removed. The characteristics of original and scrubbed diatomite were compared by SEM,TEM,specific surface area analyzer and FT-IR. The test results indicated that the SiO2content of scrubbed diatomite increased from 80.61% to 89.56%, specific surface area increased from 7.96 m2/g to 14.39 m2/g and the external activity improved, and the adsorption of performance of scrubbed diatomite was better than that of original diatomite.
Effects of Vocational School Students’ Web-Based Collaborative Learning on Diagnosis and Repair in Automobile Electrical Systems – Cases of Starting, Charging and Ignition Systems
Authors: Shin Chuan Yuan , Guo Yi Wen , Chung Ruey Gwo
Published: April 2011

The purpose of this study is to explore the effects of web-based collaborative learning with automobile electrical system diagnosis and repair on starting the system, charging system and ignition system. Literature review and experimental design were utilized to analyze the learning effects of automobile electrical system diagnosis and repair cognitive, psychomotor and affective and the measurement of collaborative learning effects scales after experimental teaching. The expected effects of this study, is to find out about the digital materials of the web-based automobile electrical system diagnosis and repair are used and explored in teaching methods of collaborative learning through experimental teaching for students from automobile department in vocational schools. Proceeding the learning effects of automobile electrical system diagnosis and repair cognitive, psychomotor and affective and the measurement of collaborative learning effects scales after experimental teaching. Hopefully, the results and suggestions can be a reference of planning practical digital materials instruction in automobile electrical system diagnosis and repair in vocational high schools.
The Way of Selection Antenna in Distributed Wireless Communication System
Authors: Wang Gang , Xu Jia Pin
Published: April 2011

Distributed Wireless Communication System(DWCS) is a new communication system, which adapts to the future communication. In this system, antenna selection scheme plays a significant role in the communication quality which will influence the communication system performances. In this paper, the antenna selection method of DWCS is presented, and then makes detailed theoretical analysis. By selecting the number of antenna and dynamic formation of virtual cells, and then performance analysis results are in good agreement with simulation results, which verifies the validity of the method. The simulation shows that the antenna selection method of DWCS with dynamic virtual cells is better than the antenna selection method without dynamic virtual cells.
Public Watermark Detection Resistant to Sensitivity Attacks
Authors: Wang Hong , Wei Shi Min
Published: April 2011

A public watermark detection scheme using verifiable secret sharing is proposed. It removes the expensive zero-knowledge interactive proofs and replaces the traditional trusted third party with a group of proxies. Moreover, the scheme is secure against sensitivity attacks and very efficient in terms of computation cost, the number of rounds and bandwidth required in the communications.
How Consumers’ Characteristics Impact their Online Purchase Intention: A Literature Review
Authors: Yang Yang , Fang Zheng , Ji Peng Fei , Cai Jing , Li Wei
Published: April 2011

During the past 10 years, online shopping developed quickly, which made it a hot topic in marketing research. From 5 aspects, demographics, purchasing behavior, online experience, website design and marketing mix, this paper not only concludes previous research findings, but also analyzes conflicting viewpoints among the present research and deliberates future research opportunities related to online shopping.
Research on Visual Production Process Control System Oriented to Discrete Manufacturing
Authors: Li Wan Gao , Liu Xiao Le , Sun De Chang
Published: April 2011

Firstly, the requirements of production control and the features of discrete manufacturing process were researched , the production process control system architecture was built. Then, the key technologies used in the system realization were studied. Automatic identification technology was used in data acquisition; product tracking and event tracking technologies were used to implement production monitor, abnormal monitor respectivly in application server; Web technology was used in production statistics and analysis in presentation layer. Data acquisition and statement analysis implementation were separately based on the Windows and Web application of NET platform; products tracing and event tracking implementtation were based on the configuration visual software platform: GE Cimplicity. Every layer is distinct and seamless integration in the entire system, the whole architecture has strongly robustness and expandability. Finally, a case proved the validity of this system.
The Influence of the Curved Transition on the Coach Roof Cross Beams in Rollover Crashworthiness
Authors: Shen Fu Lin , Jiu Jun Liang , Li Zhao Kai , Xie Xu Liang , Mao Ying Hui
Published: April 2011

In order to improve the rollover crashworthiness of coach, three roof beam structures commonly used in coach were established with finite element models for the rollover simulation, then the energy absorption, acceleration and body pillar deformation were analyzed. The simulation results show that circle-curved transition and non-curved transition on the roof have better collision performance. Especially, the latter not only reduces the acceleration peak value, but also transfers more collision energy to the offside lateral. The whole coach body will be involved in deformation, thus, the intrusion of survival space would be reduced. Finally, the complete vehicle skeleton finite element model of a 6127-type high-bed coach was built, and the influences of circle-curved transition and non-curved transition on the roof in rollover test were analyzed.
Decision Based on Fuzzy Multi-Objective Programming Method of High-Tech Investment Portfolio
Authors: Wang Ting , Li Li Feng
Published: April 2011

The expected rate of earnings and risk of high-tech projects are very fuzzy, and investors hope to get the expected rate of earnings maximization and risk minimization. Therefore, this paper establishes the model of fuzzy multi-objective programming method to select an optimal portfolio scheme. On the one hand, the objectives risk can be scattered, on the other hand investors can get ideal earnings. The example shows that this method to solve problems of portfolio investment decision is feasible and effective.
Improved Large Spring / Stiffness Technique for Dynamic Response Analysis of Structures Subjected to Base Excitations
Authors: Zhou Guo Liang , Li Xiao Jun , Peng Xiao Bo
Published: April 2011

Based on the large spring/stiffness method (LSM), this paper develops an improved technique (I-LSM) applicable to structural dynamic analysis with the assumption of Rayleigh damping. To estimate the accuracy of the technique, the dynamic response is analyzed for a 2-DOFs model respectively subjected to uniform/nonuniform seismic excitations. It indicates that the traditional LSM is inapplicable when Rayleigh damping is adopted. And the errors increase monotonously with the aggrandizement of damping. It’s also validated that the I-LSM based on the modification of displacement considering the influences of Rayleigh damping presented in this paper is able to effectively yield results almost identical to those of theoretical methods with errors beneath 4%.
The Change of Tangshan Nanhu Wetland Landscape and Ecological Quality Assessment
Authors: Guo Ai Hong , Wang Cheng Jun , Zhang Su Juan
Published: April 2011

Landscape characteristics and dynamics change are studied based on RS and GIS from 1993 to 2007. The results show that there is a big change in Tangshan Nanhu wetland subsidence in the last 15 years. Construction land, water bodies, woodland regional landscape pattern instead of the landscape of construction land and farmland. The change is caused by mining production and land reclamation activities mainly. Take the forest cover index, grass cover index, wetland index, index of landscape heterogeneity, landscape diversity, biological abundance index and Poor index of ecological as assessment index, use analytic hierarchy process to determine the weight of indexes, evaluate Nanhu area eco-environmental quality. The results show that: From 1993 to 2000, there is a slight decline in environmental quality; and since 2000, environmental quality has become better and better.
Experiments on Specific Energy and Pulping Quality of Extrusion Mechanical Pulping
Authors: Shen Xiao Yang , Wang Ping , Zhang June , Wang Gao Sheng
Published: April 2011

In order to select rational screw parameters for improving the pulping quality, efficiency and reducing specific energy, the paper studied the effects of the rotational speed of screw, lead number of reverse thread and slot width of reverse flight of the twin screw pulping extruder (TSPE) on specific energy, flux and pulping quality (reject rate, fiber length and fine component content) in the processes of extrusion mechanical pulping. The experimental results show that synthetically considering and pulping quality the efficiency, the screw rotational speed of 300 r/min–400 r/min is more appropriate. For poplar chips, the lead number should be greater than or equal to six. And for cotton stalks and wheat straws, the lead number should be no less than seven. For the combination screws of multiple extrusion zones, the slot width of the ultimate extrusion zone plays a decisive role on the fiber length. In addition, the slot width can also adjust the barrel pressure and the axial force of the screws. The work of the paper is significant for optimum design of the TSPE.
Research on the Advantages of Nanofibrous Air Filtration Membrane
Authors: Wang Han , Yang Zuo Yi , Liu Jin Yong , Zheng Gao Feng , Liu Yin Ping
Published: April 2011

When nanofibers could be made last century, its filtration potential was expected in a lot of professional fields, such as building industry, medical industry and Environmental protection industry. In the present study, in order to prove and explain its performances, nanofibrous membrane with given thickness was electrospun with 8% PVA solution on conventional cotton scaffold. Then by means of special air filtration test system, the filtration performances between PVA nanofibrous membrane and conventional fibrous filters were confirmed and compared. Besides, the filtration efficiencies of particles distribution 0.3-5um were attained, and at the same time, another important parameter, pressure-drops, could be observed, too. Through data analysis, the differences of filtration performances were verified. Despite the fact that nanofibrous membrane had higher pressure-drops, its filtration efficiency could reach startlingly 99% for some given particles. In succession, SEM was used to observe the particles distribution in filter, and the different filtration mechanisms were analyzed and discussed with SEMS images. Furthermore, we found that the direct inception and the inertial impact improved nanofiber filtration efficiency, while too small diameter of nanofiber induced higher pressure-drops. In general, nanofibers have huge value in air filtration application.
A Multi-Enterprise Dynamic Scheduling Model Based on Multi-Agent System
Authors: Zhao Jing Hua , Lin Jie
Published: April 2011

The coordination of multi-enterprise production scheduling with partial information sharing is important in supply chain management. This paper proposes a multi-enterprise scheduling model based on ant colony algorithm. The model managed by agents and the enterprises interact with each other to evaluate the schedules, and build new schedules if any other enterprise is unsatisfied with the status quo. This process will repeat until all enterprises are satisfied with the schedules. Finally, the paper takes an example shows that the algorithm is effective and feasible.
Analysis and Design on PBL System Based on Multi-Agent
Authors: Zhang Chun Fei , Li Meng Yang , Wei Jiu Hong , Li Wan Long
Published: April 2011

Development of information technology provides the technical support for instruction. Research on teaching-system is developed using agent technology at present. A problem based learning system is structured using multi-Agent after the characteristics of PBL is analyzed. Each agent’s function and logical structure are discussed. Composition and workflow of the system are introduced. And the last, we also made some advanced research about the key technology.
A Method of License Plate Location Based on Gray Images and Binary Images
Authors: Dong Zeng Shou , Wang Yu Jun , Zeng Jian Chao
Published: April 2011

The fast location is especially important, in the license plate recognition. In this paper, we received the candidate regions by the mathematical morphological operation, and then scanned the middle line of the binarized candidate areas. Determine the plate region using the black-white variations of the pixel in this middle line. This method is based on single line scanning which can reduce the computation time and improve the speed of license plate location.
Robust Control for Uncertain Unified Chaotic Systems with Input Nonlinearity via Improved Sliding Mode Technique
Authors: Wu Xiao Jing , Wu Xue Li
Published: April 2011

This paper investigates the robust control problem of the uncertain unified chaotic systems subject to sector input nonlinearity. First, the adaptive parameter is introduced for designing sliding surface such that the parameters of the unified chaotic system are not necessary to know. Then, based on Lyapunov theory, the controller is designed via sliding mode technique, which cancels the assumption that the information on the bound of input nonlinearity should be known for designer in advance. Finally, the sliding mode controller is applied to ensure that different uncertain chaotic systems (Lorenz system, Lü system and Chen system) states can be regulated to zero levels asymptotically in the presence of sector input nonlinearity. The simulation results demonstrated the effectiveness of the proposed controller.
Fatigue Life Prediction Based on GA-BP Algorithm
Authors: Zhang Guo Qing , Lin Hai Bo
Published: April 2011

This paper try to predict fatigue based on a GA – BP algorithm. GA algorithm is the ideal tool to cope with high efficient learning methods and optimization for topological structure of networks for BP. Compared the predicted result with the tested result and find that this method has relatively high accuracy.
Application of DCP to Evaluate Subgrade Compaction Quality
Authors: Xu Ping , Cai Ying Chun
Published: April 2011

Although DCP (Dynamic Cone Penetrometer) cannot directly reflect the subgrade compaction degree, experience shows that the smaller DCP penetration rate is and the better the compaction quality will be. Tai-Ao highway in China is selected as an engineering example, some relationship curves are obtained by in-situ tests, such as total hammering number of DCP and penetration depth, and penetration ratio and penetration depth, and these curves reveal that DCP can reflect the compaction quality in some degree. And then a lot of FWD and DCP are in-situ tested on the same points of filled and excavated subgrade, and the back-calculated CBR and FWD (1 ton, 3 ton and 5 ton) are analyzed and they have better correlation, and DCP is approved to be a better manner to test and evaluate the compaction quality of highway subgrade.
Based on RFID Food Supply Chain Traceability System Framework Design
Authors: Li Xu , Liu Pin Chao
Published: April 2011

With the people's attention to food safety issues, And RFID used in the field of the traceability of food safety. Design a system of based on RFID that used to trace the information of food safety. This paper talks about the layers of the system, as well as analyzes every layer’s function, and describes the operating mechanism of this system.
A High Throughput GALS Wrapper with Virtual Channels
Authors: Shang Shi Tong , Guan Xu Guang , Yang Yin Tang
Published: April 2011

A novel high throughput globally asynchronous locally synchronous wrapper is proposed to improve the network interface performance of network on chip. To prevent the occurrence of data sampling error, both the sender and receiver wrapper use the pausable clocking scheme to stop the clock when data come. The VC is based on Muller pipeline and chosen by the VC selector in the circuit. This wrapper can avoid the comparison between read pointer and write pointer in conventional design scheme and can increase the throughput. Simulations were based on SMIC 0.18um CMOS technology, and the sender wrapper and receiver wrapper have the throughput as high as 810Mflit/s and 820Mflit/s respectively.
In Situ Synthesis of TiO2 Nanoparticles in Xylem Cell of Living Trees under Ambient Temperature
Authors: Shi Jiang Tao , Sun Qing Feng , Li Jian
Published: April 2011

Titanium dioxide nanoparticles were produced in xylem cell of living tree by in situ hydrolysis of tetrabutyl orthotitanate (TBOT) under ambient pressure and temperature. The specimens were characterized using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDXA) and X-ray powder Diffraction (XRD) spectroscopy. From these results, spherical and uniform dispersion particles in nanoscale and anatase TiO2crystalline phase presence in xylem cell wall of Populus ussuriensis. This work demonstrates that it is possible to generate of wood-nano biological composite material in xylem cell of living tree.
A Fog-Removing Treatment Based on Combining High-Frequency Emphasis Filtering and Histogram Equalization
Authors: Zou Xing , Liu Yu , Tan Ze Fu , Tu Cheng Sheng , Zhang Hong
Published: April 2011

Fog may cause the impairment of image as well as the decrease in the distinguish ability. The present paper is to get rid of the weather’s influence from the impaired image. According to Retinex theory and exponential relationship between the degradation of the image and the depths of the scene points, it puts forward a fog-removing treatment based on combining high-frequency emphasis filtering and histogram equalization .Firstly, obtain the padding parameters and fill it. Secondly, filter the impaired image using Butterworth highpass filter of order 2. Through the padding parameters, Highpass filtering is not overly sensitive to the value of cutoff frequencies, as long as the radius of the filter is not so small that frequencies near the origin of the transform are passed. In which the gray-level tonality due to the low-frequency components was retained. Lastly, histogram balanced the image gotten last step. The simulation result based on Matlab shows his algorithm can effectively improve the visual effect scene under the condition of mist.
An Effective Genetic-Based Mathematical Computation Algorithm for Minimizing the Lennard-Jones Potential
Authors: Li Guo Cheng
Published: April 2011

In molecular dynamics, molecular mechanics and quantum mechanics for a complicated system, most of the numerical calculations are at the Lennard-Jones potential. So, effective treatment of Lennard-Jones potential shows an important role. This paper presents an effective algorithm for the optimization of Lennard-Jones potential. The algorithm is a genetic-based algorithm associated with the owerful discrete gradient method and the correct choice of initial coordinates. Numerical results show the effectiveness of the present algorithm and new bestresults for 39,40,42,48,55,75,76,97 atoms were found. These results might be used to study the structure of spherical viruses and molecules.
Improved Two-Dimensional Fisher Criterion Image Segmentation Method and its Application
Authors: Yong Liu , Ying Lin , Liang Yuan
Published: April 2011

In order to locate and segment the image of grain bags in the granary reserves, and making full use of the spatial location information of grain bags, a threshold method is proposed base on two-dimensional Fisher criterion. Firstly, a two-dimensional histogram is obtained by the gray value and the local average gray value of the pixels. Then, the two-dimensional Fisher criterion function value is determined from the two-dimensional histogram. When the maximum function value is obtained, the pair of gray values is the threshold which can be the optimal threshold value. Since the traditional two-dimensional Fisher algorithm is always time-consuming in processing image, a novel and efficient algorithm is proposed to reduce the computational complexity by introducing a fast classification program. Experimental results indicate that the two-dimensional Fisher method which can distinguish the various grain bag regions efficiently and reduce the computation time greatly gives a steady performance.
The Designation of Quality and Price Based on Vertical Product Differentiation
Authors: Su Ying Sheng , Li Jian Fu , Wu Jiang , Ji Peng Fei
Published: April 2011

Different consumer demands different quality, which determines that existence of different quality of the same product is reasonable. The article uses two-stage game of fully non-perfect information. Through two-stage game analysis, the article concludes that whether new entrants should enter the market is not only related with the fixed cost of entry, the number of consumers and the highest taste of consumers, but also related to the quality choices of incumbents; after entrants enter the market, the choices of quality are decided by the quality choices of incumbents.
Quantitative Evaluation of IC Micro-Topography’s Influence on Image Characteristics
Authors: Liang Zhong Wei , Zhang Chun Liang , You Si Kun , Li Ai She
Published: April 2011

For the purpose of accurate inspecting IC chip by image, fuzzy gray theory is used for quantitative evaluating the IC micro-topography’s influence on its image characteristics. Through extracting topography’s feature-points by precise coordinate measuring apparatus, its spatial surface model is structured and the topography characteristic parameters array is established, thus a mathematical model of fuzzy gray evaluating system is obtained. After calculating the fuzzy gray relational degree between the topography characteristics and the image ones, the influence has been quantified. By experiment repeatedly the influence discipline is analyzed and the conclusions are reached. It provides theoretical foundation and technical preparation for IC image sampling condition’s selection and adjustment.
A Note on the Adjacent Vertex Distinguishing Total Chromatic Number of Graph
Authors: Wang Zhi Wen
Published: April 2011

A total coloring of a simple graph G is called adjacent vertex distinguishing if for any two adjacent and distinct vertices u and v in G, the set of colors assigned to the vertices and the edges incident to u differs from the set of colors assigned to the vertices and the edges incident to v. In this paper we shall prove the series-parallel graph with maximum degree 3 and the series-parallel graph whose the number of edges is the double of maximum degree minus 1 satisfy the adjacent vertex distinguishing total coloring conjecture.
Multi-Step Forward Finite Element Method for the Numerical Simulation of Sheet Metal Forming
Authors: Wu Jian Jun , Liu Wei , Zhao Yu Jing
Published: April 2011

The multi-step forward finite element method is presented for the numerical simulation of multi-step sheet metal forming. The traditional constitutive relationship is modified according to the multi-step forming processes, and double spreading plane based mapping method is used to obtain the initial solutions of the intermediate configurations. To verify the multi-step forward FEM, the two-step simulation of a stepped box deep-drawing part is carried out as it is in the experiment. The comparison with the results of the incremental FEM and test shows that the multi-step forward FEM is efficient for the numerical simulation of multi-step sheet metal forming processes.
Research on Seat Design of Railway Passenger Car
Authors: Zhang Bing Chen , Guo Wei Min , Wang Yan Qun
Published: April 2011

Railway transportation hold a leading post in the long-distance passenger transport market. Passengers spend most of their time sitting, so seat affect passenger comfort most among interior facilities of coach. One of the major tasks of interior design is functionality and comfort of seat. Seat width, seat depth and seat height are basic functions factors of seat. The seat depth is major issue of functionality design of 25g car. The shape of cushion and backrest are main comfort factors of seat. The backrest angle is major issue of comfort design of 25g car now. The interior system design of railway passenger car can be developed if we stress and make rational use of these factors of seat design.
Investigation on Plastic Forming of Foam Aluminum Material
Authors: Chen Hai Bin , Sun Zhen Zhong , He Wei Feng , Li Rong Yong
Published: April 2011

The article focuses on analyzing plastic deformation and microstructure evolution mechanism of foam aluminum material when foam aluminum is compressed and stretched uniaxially at room temperature, and studying plastic deformation of foam aluminum at room temperature and high temperature. Results show that cold forming of foam material is restricted by many factors. So, it only carries out some simple integral forming and local plastic forming; High temperature reduces the yield stress and deformation limits of foam material, that the forming can be easily carried out. If parts of TiH2 foam aluminum are processed, the temperature must be below solidus temperature in order to avoiding destructing pore structure.
Parametric Simulation on Torque-Angle Characteristic of Rotary Electromagnet with Low Inertia
Authors: Meng Bin , Ruan Jian , Li Sheng
Published: April 2011

Since conventional electro-mechanical converter of 2D digital valve had limitations of large inertia and low dynamic response, a novel low inertia rotary electromagnet with coreless rotor structure was proposed. The axial magnetic flux generated by permanent magnet and the radial magnetic flux generated by excitation coils were superimposed and then electromagnetic torque was produced to drive rotor to track the input signal simultaneously. Based on the approach of 3D finite element electromagnetic field simulation, the influence of key structure and operating parameters such as excitation ampere turns, working air gap, tooth height, tooth width and wall thickness of coreless rotor on torque-angle characteristic was discussed. The result obtained provides a certain reference value on the structural optimization of electro-mechanical converter of 2D digital valve.