bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Reuse of Open-Pit Mines Abandoned Lands in Nanjing City
Authors: Tan Ying , Wang Lin Lin
Published: October 2013

Mining abandoned lands had become a new problem encountered in the process of urbanization in China. This article described a research of typical case, which took Nanjing city as the study space, and abandoned lands of open-pit mines as the study type. With an site investigation and data analysis, this research focused on the following four aspects: hierarchical size, mining methods, location distribution, and reuse situation. Working over the characteristics of current situation, this article pointed out existing problems and set goals. Then two advices were given to the further reuse work of open-pit mines abandoned lands in Nanjing. The first one is implementation by sorting and in batches, and the second one is economic measures combined effectively.
Development and Exploitation of the Xilan Karp
Authors: Wang Yue Fei
Published: October 2013

This text mainly is aim at the research of Xilan Karp pattern and the discussion to the innovation and the exploitation to the pattern. It primarily introduces the Xilan Karp’s creation background , history, craft characteristics, pattern category, form, cultural content , the value of development and utilization and etc. By studying its contents,topic,pattern, design ,weaving technique and material, I put forward some ideas on how to develope and exploit Xilan Karp. Xilan Karp is one of the typical representatives of Tujia traditional culture and art, the inheritance and development of tujia culture ,the fruit of Tujia people’s hardworking and wisdom. Xilan Karp each pattern contains a beautiful story filled with Tujia people’s pursuit of happiness and a better life.
Research and Application Progress of Shiraia bambusicola
Authors: Chen Yi Meng , Liu Yong Xiang , Liu Zuo Yi , Zhou De Qun
Published: October 2013

Shiraia bambusicola is a medicinal fungus growing on the twigs of bamboo plants, with the higher value in medicinal use. The natural resource of S. bambusicola has rapidly reduced recently because of the large-scale over-collection and the habitat destruction. The resource would be in extinction if there are no any protective measures and availability of sustainable use strategies. In this paper it is summarized that the application and development of S. bambusicola. A comprehensive analysis on the progress of research as well as the current problems in application and the future outlook are also proposed in the paper.
Preparation and Characterization of Ethyl Cellulose-Based Microcapsules Containing Argy Wormwood Solution
Authors: Jiang Ping , Li Du Xin , Liu Yue Jun
Published: October 2013

The biodegradable microcapsules based ethyl cellulose (EC) for a controlled delivery of Argy Wormwood solution (AWS) were prepared by emulsionsolvent evaporation method using ethyl acetate as solvent. This study examined the effect of the ratios of core to shell on the size of microcapsules. SEM images of microcapsules showed uniform spherical structures with smooth surfaces with a particle size distribution of 100nm2μm. Core-shell, hetero-structures were confirmed using optical micrograph. The chemical structure of the microcapsules was determined by FTIR.
Mathematical Models for Predicting and Managing Water Resources — The Case of China in 2025
Authors: Wang Ning Na , Zhou Qin Lin
Published: October 2013

An effective management of water supply is critically significant to a countrys water utilities, and accurate prediction of water supply and demand is of key importance for water supply management. The objectives of this paper are to use Grey System Model (GSM) and Linear Regression Model to forecast the water demand and water supply respectively in China 2025, and then propose a new Optimal Allocation Model (OAM) to generate solution so that analysts and decision makers can gain insight and understanding. The two predictive models take into account four major factors including domestic development, agriculture, industries and eco-environment, calculating a deficit between water demand and water supply in China 2025. Then the OAM, which considers desalinization, irrigation saving and urban recycling, provides a feasible solution to fill the gap and an effectual management of water supply.
Elasto-Plastic Analysis of Soil around Tubular Pile Based on Triple Shear Unified Yield Criterion
Authors: Luo Xiao Yan
Published: October 2013

The elasto-plastic analysis using the triple shear unified yield criterion and the cavity expansion theory is devoted to soil around the tubular pile. When the influence of the intermediate principal stress is considered, the driving effect of the tubular pile is studied. The relationship between plastic zone, the limit expansion pressure, the radial stresses and the parameterbis also obtained. The results show that the radius of plastic zone is decreased and the limit expansion pressure is increased, at the same radius, the radial stress is also increased, because of the effect of intermediate principal stress.
An Analysis on Structure Type Selection and Optimization of the Formtraveller for Cantilever Construction
Authors: Liu Xiao Yu , Li Liang
Published: October 2013

Aiming at the advantages and disadvantages of triangle and rhombic main truss-types and their respective scopes of application, a comparative analysis for the two commonly used truss-type formtravellers has been done. The main factors for analysis are load bearing capability, structural rigidity, steel consumption and working space. It provides a useful reference for the design and selection of the formtraveller. In addition, for the overall deformation of the formtraveller, it is structural optimized while height of column of the truss and suspenders are changed. Finally, the analysis results show the reasonable height of the column and suspender arrangement to achieve the construction target of safety and cost-effectiveness.
Application of Ultrafiltration-Reverse Osmosis System in Reclamation and Reuse of Port Sewage
Authors: Wang Xiao Hui , Li Guo Yi
Published: October 2013

Pilot test of combined process of Ultrafiltration and Reverse Osmosis was researched in this paper, which is the advanced treatment of the MBR technology effluent of port sewage,the result suggested that this devices was feasible in technology, and the quality of effluent was stable, better than the quality standard of The Reuse of Urban Recycling Water-Water Quality for urban miscellaneous water.
Research on Evaluation Index System of Durability and Life Prediction for Concrete Structure
Authors: Zhang Shan , Zhang Ya Na , Liu Yan
Published: October 2013

According to the different environment characteristics of China, the environments are divided into five types. Concrete durability evaluation index system is established in connection with different influence degree of durability factors in different environment. Combining with the properties of entropy, the weight of each influence factor index in a specific environment is determined by using Extension AHP, in order to avoid the disunity and incomplete of traditional AHP and eliminate the subjectivity to a certain extent in the process of index weight calculation. On this basis, the application software of the concrete durability evaluation and the life prediction for existing structure is programmed, which is applied in the living example. The analysis result shows that the application software has some important application value and practical significance, which can evaluate the durability of concrete structure effectively.
Modification of Pine-Wood/Formaldehyde-Urea Resin Composites Using Electron-Beam Radiation
Authors: Zhang Ming Xin , Huang Jian Wei , Wang Nai Yan
Published: October 2013

Modification of pine woods which impregnated with formaldehyde-urea resin and subsequently cured by electron-beam (EB) radiation was studied. The results showed that the impregnated wood samples can easily cured by EB radiation under dose of 40~60kGy in air. And the water resistance and tensile strength of the wood samples were both improved significantly with proper treatments of impregnation and EB radiation curing.
Research on Removal Impurities from Vein Quartz Sand with Complexing Agents
Authors: Zhong Le Le , Lei Shao Min , Wang En Wen , Pei Zhen Yu , Li Liang , Yang Ya Yun
Published: October 2013

The impurities removed from the vein quartz sands were investigated with six complexing agents (citric, oxalic, acetic, humic acid, EDTA and thiourea). So as to optimized the leaching reaction parameters and to reach a high rate of impurities removal, the kinds and concentration of complexing agents, reaction temperature and time were also discussed. The results shown that the impurities can be dissolved very effectively by both oxalic acid and acetic acid, and then, the citric, humic acid, EDTA and thiourea can also be increased partly rate of impurities removal. At the same time, the interior impurities of the vein quartz sands has been dissolved out that primary depended on the mixed acids which were 2.0M HCl, 0.5M HF, and 0.8M oxalic acid complexing agent at 80°Cfor 8h. The removal rate of elements Fe, Al, K, Na, Ca, and Mg were respectively 93.31, 47.06, 17.28, 28.82, 12.58 and 62.44 percent.
Measurement on the Influence Lines of Bridge Responses Corresponding with Moving-Load Position
Authors: Jun Zhang , Zhou Zi Wen , Gou Ming Kang , Liang Chuan
Published: October 2013

With more and more precise calculation and analysis to the bridge, and its carrying capacity assessment and repair reinforcement universal attention, it is necessary to acquire the influence line of bridge responses corresponding with moving-load position. A method is presented to obtain the influence line by experiment. A laser rangefinder with large range is added to original test instruments. The moving load position parameter can be looked on as displacement after the signal conversion, which can be synchronously collected together with the response signal. The inverse function principle is introduced to process the data. The examples indicate that the present approach can accurately measure the influence line.
Effect of Carbonization Impact on Compressive Strength of Cement-Fly Ash Mortar Subjected to Freeze-Thaw Cycles
Authors: Li Xiang , Li Ming Xia , Shen Xiao Ming , Yang Hua Quan
Published: October 2013

The effect of carbonation on compressive strength of cement-fly ash mortar which subjected to freeze-thaw cycles were investigated by means of orthogonal design method. The results show that carbonization time is the main factors affecting compressive strength of cement-fly ash mortar subjected to freeze-thaw cycles, followed by the water-cement ratio, the number of freeze-thaw cycles and mix amount of fly ash. Carbonization improves the frost resistance of concrete in some extent, and in a reasonable range, the longer carbonation time is, the stronger frost resistance capacity is.
Research on the Development of Agricultural Mechanical Automation in Mechanical Engineering
Authors: Yang Hong Wei , Zhang Li Ying
Published: October 2013

Agricultural mechanization was a research emphasis in mechanical engineering and one of the basic content of modern agriculture, it possessed very significant effect on increasing agricultural productivity. The present status and development tendency on agricultural mechanization at home and abroad were expounded in this paper. Through the analysis of agricultural mechanization to modern agriculture, the theories of promoting the development of precision agriculture, agricultural robots, automatic control were put forward. At last, some advices on speeding up agricultural mechanization in mechanical engineering were given.
Analysis of Fans Activating Time on Smoke Control for Road Tunnel Fire
Authors: Han Xin , Li Xin Na , Cong Bei Hua
Published: October 2013

With the development of economy, more and more road tunnels have been built. Due to the relatively isolated environment of the tunnel, fire protection is the most important factor for the safe management of tunnel operation. During the fire process, many people are killed by the fire smoke. As for preventive measures of road tunnel fire, smoke exhaust system is the most effective way to control the spread of fire smoke. Based on full size tunnel fire test and simulation analysis, this paper carries out effect analysis of fans activating time on smoke control mode for road tunnel fire. The corresponding results are useful to establish fire control strategy and personnel evacuation plan for tunnel management system.
Biodegradability Enhancement of Papermaking Wastewater by Electron Beam Irradiation
Authors: Jiang Yan , Wang Nai Yan , Huang Jian Wei , Hu Tao , Zhang Ming Xin , Zhang Yao Feng , Li Yao Gang
Published: October 2013

Papermaking wastewater is one of six industry polluted sources. It generally contains various pollutants which can cause many problems during biological treatment. The biodegradability of papermaking wastewater was enhanced by electron beam irradiation with an activated sludge process. The value of the BOD5/COD ratio increased at a 20kGy dose. The non-biodegradable organic compounds were converted into biodegradable compounds. High organic removal efficiencies and high microbial activities were achieved in activated sludge process. The application of an integrated system can be a powerful process which contains electron beam irradiation and a biological treatment to papermaking wastewater.
Crystal Structure of 3-Indolepropionic Acid
Authors: Wang Li Hua
Published: October 2013

The crystals of 3-indolepropionic acid have been obtained by evaporation from ethanol solution. The crystal structure of the 3-indolepropionic acid was determined by X-ray single crystal diffraction analysis. The crystal data for 3-indolepropionic acid: monoclinic, space group P2(1)/c, a = 14.3592(8) Å, b = 5.2446(2) Å, c = 12.3518(6) Å, V = 926.96(8) Å3, Z = 4, Mr = 189.21, De = 1.356 g/cm3, T = 298(2) K, F (000) = 400, R = 0.0435 and wR = 0.1010. The compound forms one-dimensional chained structure through hydrogen bonds and π-π interaction.
A Novel Porous Ferromagnetic Glass-Ceramic for Hyperthermia Application
Authors: Liu Jian An , Zhang Mei Mei , Yang Xue Na
Published: October 2013

A novel porous ferromagnetic glass-ceramic has been synthesized with glassceramic and hydroxyapatite for hyperthermia application. The glassceramic was obtained from a melt derived glass, and the hydroxyapatite was prepared via precipitation method with biological template (YEAST). Both components of such a mixture were sintered at 1000 °C for 1 hour in graphite. The sample was characterized by x-ray diffraction, scanning electron microscopy and magnetic measurements. This material exhibited magnetic behavior and porosity. The results show that porous ferromagnetic glass-ceramic, which saturation magnetization (Ms) of about 25 A·m2/kg and diameter of porous 30-50μm, was obtained.
A Decoupling Algorithm for Full Vehicle Active Suspension Rolling Control
Authors: Chen Jian Guo
Published: October 2013

Vehicle is a MIMO coupling system, and its vibration is affected by multiple factors. Particularly under the steering condition, the rolling motion of the vehicle gets aggravated. In order to reduce the rolling angle of the vehicle effectively, a full vehicle model with active suspension is established and decoupling algorithm is proposed. The simulations show that the rolling angle of the vehicle is attenuated greatly, and the ride comfort and stability under steering condition are improved remarkably, which indicates that the control algorithm is effective.
Experimental Investigation on Damping Characteristic of Metal Rubber Material at Simulated Marine Environment
Authors: Lin Zhen , Li Guo Zhang , Bai Hong Bai , Lu Chun Hong
Published: October 2013

To meet the need of damping material at the marine corrosive environment, the clamped-edge disk type of metal rubber specimen is designed and its corrosion-load alternate experiment is performed, the anti-corrosive and damping characteristic of the material at the marine corrosive environment is researched. The experimental results show that the corrosive rate of 304 stainless steel metal rubber specimen at cycle-immersion corrosion-load alternate environment is the highest and its decay rate of dynamic average rigidity is also the highest, and followed by full-immersion, cycle-salt-spray and full-salt-spray environment. The damping characteristic of metal rubber specimen is relatively stable at the corrosion-load alternate experiment; the metal rubber material has anti-corrosion ability at marine environment.
Angle Measurement Based on Computer Vision
Authors: Wang Jun , Ni Xiao Hua
Published: October 2013

In order to improve the precision and the speed of angle measurement,A new method for measuring the angle of the workpiece is presented in this paper, which is based on the computer vision testing technology. The image of workpiece is obtained, the first step is image preprocessing, then the measured worpiece image is processed by edge detection through Canny algorithm, specific features of workpieces edge is fully extracted, Then one can accomplish line detection by using Hough transform, Finally, the angle value is obtained through the means of Angle Calculation. By employing practical examples in engineering and simulation experiments, the experimental results proved the method has more strong anti-interference ability, more high accuracy and speed than traditional method.
Laser Shock Processing of Titanium Alloy Blade and FEM Simulation
Authors: Yan Bing , Wang Rui
Published: October 2013

The aim of this article is to analyze the residual stresses field in a TC4 titanium alloy blade by laser shock processing (LSP).LSP is a new surface processing technology, it uses the laser shock wave to act on the surface of the target and form residual compressive stresses field. The ABAQUS software is applied to simulate the LSP of TC4 titanium alloy blade, and the distributions of the residual stresses field are analysed.After single LSP,the maximum value of residual stress on the surface is 309 MPa.The residual stresses on the surface increase first and then decrease.The residual stresses at the depth continue decreasing with the increase of the depth.After multiple LSP,the maximum value of residual stress on the surface is increased and plastically affected depth is increased.
A Vibration Attenuation Control Algorithm of Half Vehicle Using Active Suspension
Authors: Chen Jian Guo , Feng Xia , Zhang Xiao Ling
Published: October 2013

Vehicle suspension is a MIMO coupling nonlinear system; its vibration couples that of the tires. For the suspension without decoupling, the vibration attenuation is difficult to be controlled precisely. In order to attenuate the vibration of the vehicle effectively, a nonlinear half vehicle model with active suspension is established and a differential geometry approach is used to decouple the nonlinear suspension system. The decoupled system becomes independent linear subsystems, though pole assignment, the vibration attenuation of the sprung mass is achieved. The simulations show that the vertical and the pitching motion of the sprung mass are attenuated greatly, which indicates that the control algorithm is effective.
The Design of the Self-Propelled All-Filming Double-Furrow Vertical Dropping Accurate Hill-Drop Planter for Corn
Authors: Zhao Wu Yun , Tang Xue Peng , Fei Qiang , Dai Fei
Published: October 2013

This machine was designed for all-filming double-furrow planting technology. The design was not only meet all membrane double corrugation agronomic requirements , but also "a film with" requirement, technology took effect for longer periods, protect arable land, ecological environment demand, and stable and reliable work and cost savings. According to above requirements, the machine used the built-in power of self-propelled structure, and we chose the optimal scheme from two kinds of power transmission system which we have designed. Import the entity model into ADAMS ,chose cavitate vertex as the measurement object, after the simulation ,output the horizontal displacement curve, speed curve and acceleration curve, and analysis of simulation results, and the results showed that the machine meet the design and agronomic requirements.
Finite Element Analysis of Spur Gears on Modal and Stress
Authors: Wang Jin Yao , Huang Ya Yu , Chen Zhao Hui
Published: October 2013

Being established and assembled in UG, the model file of spur gears was imported to ANSYS workbench, where the contact between gears was built, meshing completed later. Then support and loads was imposed on the finite element model to obtain characteristics of modal and stress distribution on the teeth. After that they each were compared with working frequency and theoretically maximum contact stress and we found the fact was they fit well. By doing this, it is sound to say finite element analysis of spur gears on modal and stress is effective, feasible and reliable.
The Design of Electric Car Battery Box Test Equipment
Authors: Cui Qing Dong , Yao Lin , Zhu Yun Xiao
Published: October 2013

Along with the development of the electric car industry, the electric car battery box quality testing problem has taken the industry's attention, this article through analysis the structure of existing electric battery box in the market, elaborated a new, universal battery box testing equipment design; The device implements the electric car battery box automated testing and evaluation, not only reduced the labors intensity, improve the reliability of the product testing, credibility and the pre - qualified rate of battery box, but also the working efficiency has been greatly improved, and fill the gap of the industry.
A Research on the Positioning and Tracking Technology of the Mobile Device for Testing the Thermal Performance of Solar Collector
Authors: He Tao , Wu Jie , Wu Xiao Hong , Zhong Ming , You Jun
Published: October 2013

A moving platform and a solar tracking mechanism of a system for testing the thermal performance of solar collector have been researched and designed, worm gear and servo system are used in as well, which improve the precision of the control and the reliability of the movement. The control program based on standard state machine model is designed in the development platform of virtual instrument, and it achieves the precise control of the moving platform and the solar tracking mechanism, which guarantees to test the thermal performance of solar collector.
Research on 3D Reconstruction of Flatness Error Measurement System
Authors: Zou Chun Long , Wang Shen Huai , Hao Huang , Chen Yu Rong
Published: October 2013

Basis on the analysis of the plate flatness detection, some problems of the traditional flatness measuring method is pointed out and the 3D reconstruction method of flatness is proposed. The digital flatness measuring instrument is designed, and the measured plane information is entered into the computer, then the data processing is completed by software, which solves the problem of amounts of data, complicated calculation and low accuracy of traditional measurement method. The 3D reconstruction of surface morphology is completed by OpenGL and BCB, to make the information of flatness more sufficient and intuitive. To verify the validity of the measurement, use the flatness function module of dual-frequency laser interferometer to evaluate the instrument accuracy, the results show that it reaches the expected precision index.
Green Design and Manufacturing of Premium Efficiency Motor
Authors: Wang Lie Zhun , Liu Zi Qing
Published: October 2013

YE3 series of premium efficiency three-phase asynchronous motors adopt computer integrated system and anticipate the best optimized electrical design. In the structure design, airflow validity is analyzed by finite-element method (FEM) and the motors fan is designed optimally through experimental results; on the fan housing, the Ansoft finite-element method is used in analyzing the electromagnetic field , and designing optimally electromagnetic environment with the test results; the finite-element method is also used in analyzing the temperature field, connecting with the test results to optimize the ventilation structure. The radiating rib is metrical distribution and arrangement along the diameter of axle direction on the motor housing, following the principle of heat radiation and the principle of fluid mechanics, which can improve the ventilation and cooling effect. The design of the motor has reached the international advanced level.
A Novel Friction Model Basing on Journal Bearing Theory for Reciprocating Compressor
Authors: Wang Le , Tang Bin , Zhao Yuan Yang
Published: October 2013

The paper presents a comprehensive friction model of reciprocating compressor which is able to evaluate friction losses in moving parts. The model consists of crankshaft, connecting rod and piston all supported by bearings as well as the piston ring/cylinder interface viewed as sliding friction. Hydrodynamic lubrication theory reveals relationship between load and friction coefficient and was demonstrated to be helpful to give insight to the lubrication characteristics of journal bearing. The model gave the composition of friction losses, friction coefficient dynamic change with orbiting angle and effect of oil viscosity on compressor performance. The results showed that the friction losses of piston ring/cylinder interface and the rod big end bearing was most part of the friction losses and it was necessary to choose suitable oil viscosity to reach the optimum compressor performance.
Impact Test Method for Automobile Plastic Tank Research and Equipment Development
Authors: Wang Ling Long , Du Tian Qiang , Liu Wei
Published: October 2013

The automobile fuel tank is an important component of the car, and it played an important role in the safety. Its one of the parts of car must be test in china and another place such as Europe before this parts used in a new car. In this article, the difference of requirement of low-temperature impact resistance is compared in GB18296-2001 and 70/221/EEC or ECE R34, then discuss the simple structure of pendulum for impact test according to GB18296-2001 and find it is not suitable for the impact test which required in 70/221/EEC.After that, designed an impact test rig meeting the requirements of the standard of GB18296-2001 and regulations of 70/221/EEC.The impact test bench is easy to operate, efficiency and safety.
A Study on the Method for Punching Small Holes with Cold Stamping Dies
Authors: Ning Jian Hua , Hai Zheng Ping
Published: October 2013

this paper first determines the deformation modes of punching small-hole punches by analyzing the forms of the stress applied to die working parts. It analyzes the disadvantages of existing methods for preventing the buckling problem in punching small holes such as protective jackets and proposes a method for preventing the buckling of punches by reducing the punching force so as to make it possible to punch smaller holes.
Numerical Simulation of Temperature Field and Stress Field to Multiple Laser Cladding Co Coatings
Authors: Ding Lin , Li Ming Xi , Huang Dao Ye , Jang Hong Yun
Published: October 2013

In order to analyze temperature field and stress field of Co-based alloys laser cladding, the model of Co-based alloys laser cladding with preset-powder method has been made on low carbon steel substrate. The temperature field and stress field of laser cladding process was analyzed by SYSWELD software, and Experimental verification is done. The results showed that temperature field is appear to a trailing tail of comet, favorable metallurgy bonding with 12.3% dilution was obtained by scanning velocity was 4 mm/s. and instantaneous cooling rate of molten pool with 4 mm/s and 5 mm/s are increased to 1.47 times and 2.02 times of 3 mm/s. The transverse residual stress different nodes on the surface of coatings are always tensile stress, and it is almost steady, the maximum deformation is 0.34 mm at the edge of work-piece, these are consistent with experimental results. These results provide reference and guide to obtain high quality coatings.
Path Planning of the Intersecting Line of Cylindrical Pipes Welded by the Welding Robot
Authors: Wang Yong Quan
Published: October 2013

In recent years, the welding of the intersecting lines of cylindrical Pipes is gradually replaced by welding robot operation from the traditional manual welding. In this paper, the generalized mathematical model of the intersecting line of cylindrical pipes is presented, and the intersecting line is developed into plane curve. Using the method of equal step lengths, the welding trajectory path points are obtained. In order to guarantee the welding precision, the value of the step length is obtained by calculation according to the permitted interpolation error value. This paper also gives a flowchart, which shows the process of obtaining the welding path points of the intersecting line. This method is convenient for programming the welding procedure, improves the working efficiency and ensures the stability and accuracy of welding at the same time. Finally, a common example of cylindrical pipes intersection is given, and the welding path points are obtained using programmable drawing software.
Study on the Erosion and Abrasion Mechanism of the Modern Artillery Barrel
Authors: Liao Xue Bing , Zhou Ren Bin , Yang Yun Fei , Gong Chang Hong
Published: October 2013

As a certain type of artillery barrel erosion and abrasion for the study, the formation mechanism of the barrel erosion and abrasion from the action of heat is analyzed , the effect of the heat, mechanical wear, chemical action, and so on. By taking the measures of updating gun steel, increasing use of bore coating, erosion reducing additives and others, it can greatly enhance the ability of artillery barrels ant-ablative. Experimental studies have shown that these measures effectively overcome the erosion abrasion problems of this type of artillery.
The Study on the Basic Theory of Gold Seamless Pipe Welding Numerical Simulation
Authors: Qin Wen Chao , Qi Jian Ru , Wang Li Xin , Ye Wei Hong
Published: October 2013

Based on the theory of FEM, we have established a viable three-dimensional dynamic simulation of welding field analysis method, heat distribution with a double ellipse as a welding heat source, to establish a reasonable boundary conditions, which is a reasonable choice of welding numerical simulation provides a theoretical basis, laying the groundwork for welding numerical simulation analysis of the gold industry.
Theoretical and Experimental Research on Preparing Silicon Microspheres by Pulsed Electrical Discharge Method
Authors: Hong Juan , Zhang Wei
Published: October 2013

In this paper, a new method of preparing silicon microspheres is introduced. Silicon microspheres have been produced under transient and high temperature generated with pulsed electrical discharge in the liquid. Their micro topography and composition are characterized and analyzed by SEM/EDS. The mechanism of sphere formation is studied by local area temperature field analysis using ANSYS. Various sizes of silicon particles (0.5-30μm) are successfully prepared under the different processing conditions. It is demonstrated that pulsed electrical discharge method is energy controllable, cost-effective, and is of great significance to the preparation of silicon ink which is the important material of new type of TFSC and selective emitter cell.
A Novel Method to Determine EHL Film Thickness with Optical Interference
Authors: Yang Qian Qian , Chen Ying Jun , Ping Huang
Published: October 2013

In this work, a new method to determine the interference grade of the central film is put forward. The interference figure is generated on a steel ball and a glass disc with a green monochromatic two-beam interferometry. With gradually increasing the rotational speed of the glass disc, the corresponding interference intensities of the central contact area are continually collected and sent to the computer. With these data, the periodical curve of the central interference grey value with the sliding speed has been drawn. Then, the curve is compared with the theoretical result so that the central interference grade of each figure can be determined. It has been found that while the sliding speed varies from 0.09 m/s to 0.21 m/s, the central interference grade of the interference figure is the first under the working conditions of the present paper. As the sliding speed increases between 0.21 m/s and 0.4 m/s, the second grade of the central interference figure is achieved. As the central interference grade has been known, the film thickness and the film shape can be easily determined by the interference picture of the EHL film and the relative optical intensity principle.
Condition Assessment of MRTB Based on Fuzzy Theory
Authors: Dai Jing , Chen Guan Ru
Published: October 2013

As one of the core equipment of high-voltage direct-current (HVDC) transmission system, the health status of MRTB would directly threaten the secure and stable operation of power system. Aiming at correctly getting the real-time operating status of MRTB , a new condition assessment method base on fuzzy theory is proposed and the corresponding device has been developed in this paper. After sampling the oscillating current, this method calculates arcing time by wavelet theory ,then fuzzy theory is used to judge the operating status of MRTB.
The Effects of the Wear Elongation on the Load of a Long-Distance Transmission Chain
Authors: Zhao Jun Tian , Wang Shun Zeng , Wang Zhen Xing
Published: October 2013

This paper is on the effects of the wear elongation on a long-distance transmission roller chain. It presents the formulas of load calculation and the formulaic relationship between load and wear elongation in theory, with the point-by-point calculation method and chains/sprockets gearing model. With RecurDyn software for the analysis and verification of the theoretical results, it concludes that the total tension of every chain is the sum of static load and the corresponding proportion of dynamic load, and that a logical pre-tension can effectively reduce the vibration.
A Bandpass Filter Based on Novel SCRLH Transmission Line Structure
Authors: Wan Li Bin , Guan Ya Lin , Tang Xin Kun
Published: October 2013

In this paper, a novel simplified composite right/left handed (SCRLH) transmission line (TL) structure is proposed.The dispersion and impedance characteristics of the novel structure are first analysed based on Bloch-Floquet theory, which shows that the attenuation constant keeps zero with a relatively smooth characteristic impedance distribution within the passband and that the characteristic impedance is purely imaginary with the inhibition of the electromagetic wave propagation outside the passband.
Impact of the Variable Sampling Intervals Scheme on the CQC Chart
Authors: Zhang Ying , Wang Xiao Juan
Published: October 2013

The Cumulative Quantity Control (CQC) chart which is based on monitoring the cumulative quantity of product manufactured has been shown to be useful for monitoring high yield processes. However, this chart is not so sensitive to small process changes and the inspection cost could be high if the inspection is frequent. In this paper, a variable sampling interval procedure of the CQC chart is developed and studied. We compare the performance of the variable sampling interval CQC chart in terms of its average time to signal with the traditional CQC chart and prove that this new chart performs better than the traditional CQC chart. The use of variable sampling interval scheme could further enhance the efficiency of traditional CQC chart.
Thoughts on How Construction Enterprises Improve Performance Management
Authors: Zuo Jian Lin
Published: October 2013

This paper briefly introduces several problems of employee performance management in construction enterprises in China, including taking performance evaluation as performance management, being lack of consistent bidirectional communications, one-sided use of results of performance evaluation, malposition of evaluators, psychological disadvantages and barriers of evaluated people and so on; the paper also provides measures including enhancing publicity on purposes and significance of performance management for employees of construction enterprises, utilizing all-round key performance index method to decompose employee-level performance indexes, enhancing communications on performance, and using results of performance evaluation in a scientific way, in order to improve performance management of construction enterprises. This research conclusion can play a role in guiding improvement of performance management of construction enterprises.
The Power Measurement of DBD Ozone Reactor Based on the Quasi-Synchronous Algorithm
Authors: Zhang Hai Chuan , Liu Zhao Jin , Li Yue
Published: October 2013

Ozone production with Dielectric Barrier Discharge (DBD) is a typical example of the applications of low temperature plasma technology. The most critical process is to inject power into the DBD reactor. But because of the characteristic of DBD reactor, the voltage and current of power supply are distorted severely and make the measurement of input power for DBD ozone reactor even hard. This paper, based on Quasi-synchronous sampling algorithm, establishes the input power measurement systems of DBD ozone reactor and achieves the online real-time monitoring input power of DBD ozone reactor. The experimental results prove that the relative errors of more than 95% is less than0.3% between power measurement system based on Quasi-synchronous sampling algorithm and the measurement data with oscilloscope.
Research on Influencing Factors of Magnesium Alloy Wheels Forging Forming Force
Authors: Li Jian , Sun Hui Xue , Sun Shao Ming , Liu Xin Xin
Published: October 2013

For magnesium alloy wheels have the advantages of light weight, remarkable energy saving effect, this article establishes a new technology of magnesium alloy wheels forging, and forging process is simulated through the use of FEM software. Investigate the effect of several key factors on the forming force. The results show that forming force increases with the die and material temperature reduces. and with the increase of Friction Coefficient, FEM analysis results provide guidance for the actual production.The energy consumption test shows that compared with aluminum alloy energy saving rate of road and laboratory bench test of magnesium alloy wheels respectively is 11 percent and 15.4 percent. Energy saving effect is remarkable.
A Simplified Representation of the Intersecting Lines of the Common Rotary Bodies Intersected in Symmetric Vertical Intersection Position in Mechanical Drawings
Authors: Wang Yong Quan , Cheng Yan Ming
Published: October 2013

In mechanical drawings, the intersecting lines of the common rotary bodies intersected in symmetric vertical intersection position are often encountered. In engineering practices, the twodimensional mechanical drawings need to be drawn directly in many cases and the drawing of theintersecting lines is frequently a difficult point. The intersecting forms of rotary bodies intersected insymmetric vertical intersection position are categorized in this paper. Through formula deducing and the subsequent summary, the drawing method for determining the height of the extreme point on theintersecting lines is obtained. Accordingly, a simplified representation of the intersecting lines ofthese kinds of parts is presented. Finally, some instances prove that this simplified representation ispractical and simple, and the circular arcs drawn by this method have a high similarity to theintersecting lines.
Dynamics Analysis and Optimization of Gear Transmission System
Authors: Zhang Hong Du , Sun Tao
Published: October 2013

The gear transmission system was parametric modeled in the software Pro/E to establish the prototype, and imported into ADAMS. The meshing force curves of time domain and frequency domain were reached through dynamic simulation. Then the gear system was optimized with several constraint conditions, such as the number of surface modes, helix angle, cutting conditions, minimum tooth width, the contact fatigue strength, and tooth root bending fatigue strength. The optimization was calculated with these constraint conditions, and got the best design of gear system. After optimization, the gear transmission system was simulated again to reach the dynamic analysis and made a contract with the former simulation results. The simulation of the optimized gear system shows that the optimized gear has good mechanical properties.
Design of the Fault Diagnosis and Maintenance Support System of New Self-Propelled Artillery Electromechanical Equipment
Authors: Liao Xue Bing , Zhou Ren Bin , Huang Lin Hao , Huang Li Juan
Published: October 2013

As the research object based on a variety of models of self-propelled artillery electromechanical equipment, detailed analysis was carried out on the self-propelled guns electrical equipment failure mode by using the artificial intelligence diagnosis and data mining technology, and a comprehensive, universal and high stability fault diagnosis and maintenance support system for the new self-propelled artillery electromechanical equipment is developed, which realize offline testing, FBI test and quality assessment, a combination of fault diagnosis, maintenance decision-making and information management. Based on the system hardware platform, the fault diagnosis model and maintenance information management system are established, the corresponding fault diagnosis and maintenance support system are finally developed.By passing test, the system have strong comprehensive ,good versatility and the characteristics of high stability.
Numerical Simulation and Experiment of Hot Roll Forming Large Module Gear
Authors: Zhu Xiao Xing , Wang Bao Yu , Hu Zheng Huan
Published: October 2013

To compare with the other gear manufacturing methods, the hot roll forming process is applied in forming large module gear. The hot gear rolling theory is realized by modeling in Solidworks and Deform-3D, the finite element model (FEM) that coupled deformation and heat transfer was established, and the FE model velocity boundaries were set by converting the workpiece rotation into the revolution speed of the roller. The total displacement of metal flow, folding angel of teeth, effect strain and the temperature distribution of the part were obtained in the whole process of hot gear rolling, also the rolling force was predicted by simulation. The simulation results reveal the forming mechanism, and the rolling experiments were carried out with self-designed rolling mill, which verify that the hot roll forming large gear is feasible.
Stabilization of a Class of Two-Dimensional Critical Control Systems
Authors: Liu Jun , Luo Hong Ying , Guo Yuan Yuan , Wu Bo
Published: October 2013

This paper uses the Lyapunov method to study the control system of a class of two-dimensional critical, and acquires the sufficient condition for absolute stability of the two-dimensional critical nonlinear control system.
A Urinary Sediment Segmentation Algorithm of Cast and Epithelial Cells
Authors: Wu Yan Hai , Kang Meng
Published: October 2013

Based on cast and epithelial cells to segment difficultly in urinary sediment, this paper propose one modified segmentation algorithm that is combining Sobel edge detection with edge enhancement algorithm, and using the fusion technology to get the whole binary results. Using cast and epithelial having great area is to remove small area impurity. Last after morphological operation can deserve a good split binary image. Experimental results show that the algorithm performs faster, complete binary cells and higher precision than segmentation algorithm from now on. The algorithm is not only suitable for cast and other large cells, but also satisfied for red and white cells, crystallize, sperm in urinary sediment.
The Design of Car Taillight Controller Based on VHDL
Authors: Wang Jing , Wang Yong
Published: October 2013

This thesis introduced the language VHDL. Then, the thesis introduced the automobile signal beacon controllers function carry on analysis and gives the design project. in the meantime I carry the circuit on software and the hardware to imitate really etc. This design made the control system usage more convenient. Also it is easy to improve.
Asymptotic Stability of Discrete Singular Bilinear Systems
Authors: Zhang Jing , Ling Chong
Published: October 2013

In this paper, the stability of discrete singular bilinear systems is discussed by the method of Lyapunov function. Some asymptotic stability criterions are given according to the equivalent system and the equivalent transformation, and the regularity is considered.
A Shunt Active Filter Based on Voltage Detection for Harmonic Filtering and Resonance Suppression
Authors: Liang Ying Yu , Xu Xing Tao , Liu Jian Zheng , Wang Yi , Yang Qi Xun
Published: October 2013

In most occasions shunt APFs and capacitors used for power factor correction exist simultaneously in the distribution network for saving costs. Ideally, APFs are used for harmonics filtering and capacitors are used for power factor correction. However, traditional control methods of APF have potential risk of resonance, affecting the stability and the effect of harmonic compensation, if the detected current contains capacitive current. This paper proposes a new control method based on voltage detection of point of common Coupling(PCC). Theoretical analysis and simulation demonstrate the new control method has functions of resonance suppression and harmonic filtering
Adsorption Thermodynamics Study on CCl2F2 over Solid Base Na2O/ZrO2
Authors: Liu Tian Cheng , Guo Yu Jiao , Tang Guang Yang , Yuan Ming Long , Ning Ping
Published: October 2013

Catalytic hydrolysis decomposition of dichlorodifluoromethane (CCl2F2) in the presence of water vapor and oxygen was studied over solid base Na2O/ZrO2 using a fixed-bed reactor. The CCl2F2 adsorption was multilayer chemical adsorption and its process was corresponding with Freundlich model. Its adsorption heat was from 43.74 to 76.31 KJ.mol-1, and the CCl2F2 adsorption over solid base Na2O/ZrO2 was exothermic and chemical.
Research on the Network Security Protocols Based on the Strand Spaces Theory
Authors: Liu Bao Ju , Wang Jian Xi
Published: October 2013

This paper focuses on different password guessing attack forms of attacker performed based on the strand spaces model. We extend the attacker’s strand spaces model in order to describe and analyze the guessing ability of the attacker. A protocol has been improved by the use of Hash function. The improved protocol has been proved to resist password guessing attack.
Identification of Excitation Forces and Prediction of the Radiation by Measured Structural Vibrations from an Underwater Structure
Authors: Gang Ji , Zhou Q. , Huang Chun Wen
Published: October 2013

An approach identifying the excitation forces based on structural vibrations measured is proposed in the paper. Based on the transfer matrix predicted by FEM/BEM and the vibration vector measured, excitation forces in frequency domain are identified. Further more, acoustic from the underwater structure is predicted by FEM/BEM. To verify the approach, experiment on was carried out for a shaker driven underwater immerged cylindrical model made of steel. Excitations are identified by accelerations measured on the shell. With the forces provided, the radiation of the shell is predicted and compared with that measured. The numerical results are shown to be in good agreement with experimental data.
Application of Encryption Lock in the Power Simulation Training Software Information Protection
Authors: Yang Yong Xian , Tu Jie , Liu Yao Jun , Liu Chun Xiang
Published: October 2013

With the level of China's power information technology increased, any information security problem appear in power system are likely to endanger the safe operation of power grid. USB dongle is a popular authentication security tool which can effectively prevent the illegal use of software. In this paper, use electrical simulation training software as an example, apply encryption lock as an important tool for the security protection of electric power simulation training software, introduce the principle and role in information security protection of encryption lock in detail.