bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Workshop Management System of Body-in-White Pressing Production
Authors: Chen Ya Zhou , Wang Lin
Published: February 2012

Based on the analyzing of the characteristics of a Body-In-White pressing production process a pressing workshop production management system has been given in order to make the ERP production scheduling more executable. The detailed function model of it such as task assignment, quality control, mold maintenance and production scheduling has been thoroughly discussed. In order to make the production line capability balance the task dispatching algorithm has been given and the dynamic dispatching and controlling process has been explained. This system can be integrated with the upper ERP/CAPP/PDM system which can improve the information level of a company.
Two-Dimensional Orthogonal Grid Generation
Authors: Liu Y.L. , Bai K. , Wang Xi , Liu Ming Qin
Published: February 2012

A method for nearly orthogonal grid generation is presented in this study. The generating system is based on solution of a system of partial differential equations with finite difference discretization. The grid quality control functions and grid properties are investigated. Specification of both boundary point distribution on all sides is used. The proposed method is applied to various test problems，which shows this method provides a good balance between controlling grid orthogonality and cell aspect ratio.
Preparation of Tens of Micrometers Sized Polystyrene Spheres
Authors: Wang Ren Jie , Guo Kai , Fan Wei Hua , Liu Xiao Yu , Liu Yu Kun , Chen Jin Zhou , Li Xin Fa
Published: February 2012

The tens of micrometers sized polystyrene(PS) microspheres were produced by dispersion polymerization in ethanol/H2O medium with poly(N-vinyl pyrrolidone) (PVP) as a dispersant and 2,2’-azobisisobutyronitrile(AIBN) as a radical initiator. The effects of PVP concentration and ethanol/H2O ratio on particle size and size distribution of PS microspheres were studied extensively. It was found that polystyrene microspheres with diameter 10-50μm were produced with 30wt% of St, 4wt% of AIBN, 3wt% of PVP and 97.5/2.5 ratio of ethanol/H2O, and narrow distribution of microspheres can be achieved by screening.
Research on Preparation Method and Etching Technique of Large Scale Free P+ Diaphragm
Authors: Zheng Zhi Xia
Published: February 2012

This paper introduces the preparation method of large scale free P+ diaphragm based on the boron doped and anisotropic wet etching techniques. It also explores the impact of the RF power configuration, pressure and SF6 flow rate on etching rate during ICP etching. It is indicated that silicon can be used as mask to solve the problems of large scale film break and the adhesion between mask and film which are caused by vacuumization during ICP etching. In order to avoid over etching, twice etching technique can be employed to control etching time and end point. Results of the experiment show that through etching, free P+ diaphragm can be fabricated into sensitive free beam which can be widely used in MEMS.
Product Lifecycle Oriented Quality Design System into Supply Chain
Authors: Jiang Xing Yu , Xu Long Zhen , Tong Ling , Zhang Xin Min
Published: February 2012

To cope with the challenges of conventional quality design system applied in supply chain, a new method of product lifecycle oriented quality design mode, which integrates voice of customer, quality function deployment (QFD) and failure modes and effect analysis (FMEA), and corresponding organization and function model were all put forward. This mode dealt mainly with constructing and running product lifecycle oriented quality design system, integrated several key technologies such as the integration of QFD and FMEA, task distribution of quality design, integrated technology of computer-supported-collaborative work (CSCW). On the basis of these, applying Java, JSP and JavaServlet to the system, improve working efficiency and shorten the development cycle so as to respond to the fluctuation of market demands as quick as possible. The quality design of some automobile was introduced as an example to verify that the system developed would efficiently meet the requirements of supply chain.
Research on the Inclusion Complex of Astaxanthin
Authors: Yang Jin Song , Yang Rui , Tan Hai Sheng
Published: February 2012

Taking β-cyclotextrin and gelatin as wall materials, study of inclusion was processed on astaxanthin. It was shown in the study that β-cyclotextrin and gelatin at the ratio of 4 to 1 was found to be the best wall material for inclusion complex. The optimal conditions of inclusion were established by the RSM experiment: when the amount of wall material was 0.4 g/g yeast, temperature 40°C, time 1.2 h, the inclusion rate could reach 81.03%. The characterization of the inclusion complex was confirmed by different temperatures and light, the result shows that the inclusion complex could improve the stability of astaxanthin. The inclusion complex was stored in dark at 4°C for 60 days, the residual rate of astaxathin could reach 95% and more stable than that before inclusion by 35%.
Research of Inverted Index Method Based on Block Organizing Technology
Authors: Yang Xiao Bo
Published: February 2012

In order to further improve the overall efficiency of retrieval system, it proposes a method of inverted index based on block organizing technology. The specific studying process is as follows. Firstly, retrieval performance model of inverted index is generated based on data statistics, and then analyze the organizational strategy of inverted file block index, finally, retrieval performance model is verified through simulation experiment. The result shows that the method of inverted file block organization can get higher algorithm efficiency under the condition of less cycle numbers in the search algorithm, and also reduce the execution time of search algorithm significantly, which can verify the feasibility of inverted file block index method.
VHDL Finite State Machine Based Elevator Controller
Authors: Ren Ning Ning , Zhang Jian Min
Published: February 2012

This paper analyzes the versatility of VHDL FSM coding and its presentation of various outputs. The analysis is based on the elevator controller project. The elevator controller was chosen because it serves as a typical digital controller system which boasts of numerous outputs like motor, lights, floor numbers, fire alarm, overweight ,beep ,direction arrows and others .Although not all outputs mentioned here are shown in the project codes but the few shown can illustrate how versatile is the VHDL FSM output representation. Other outputs can easily be added according to requirements.
Real-Time Virtual Instrument Platform Based on Multi-Thread Technique
Authors: Tao Meng Lun , Chen Ding Fang , Lu Quan Guo , Shu Liang , Zhao Ya Peng
Published: February 2012

In Virtual instrument (VI) established for computer based automated test and control, the process with only single thread has limits when developed for acquiring high speed data, analyzing and displaying them the meaning while. Any interference from another task may block the whole running process and cause data missing. In order to increase the throughput, responding time and multi-task processing efficiency of VI, multi-thread programming with the platform LabWindows/CVI is introduced in this paper. Contents include the two strategies to establish multi-thread program, Thread pool and Asynchronous Timer, and how to protect data with multi-thread programming. Finally, a case study showed a multi-thread VI based on Asynchronous Timer method, with the comparison of performance between single thread and multi-thread program.
Trigger Circuit Design for Series SCRs Valve Bank
Authors: Wang Li , Pang Yan Qing , Song Zhi Ming , Xun Tang Sheng , Gao Hong Yu , Huo Yong Hong , Hu Tie Jun , Ma Zhi Guang
Published: February 2012

This article introduces the trigger circuit of series SCRs valve and a new trigger circuit is designed for series SCRs valve of TSC. The trigger circuit is driven by voltage source and a high voltage cable is used for insulation of the pulse transformer. The trigger circuit has simple structure and a steep front of gate-current. This unit is used in 10 kV thyristor switched capacitor (TSC) reactive power compensation device, and the results verify its feasibility.
Recognition and Classification of Human Activity by Posture Sensing and Machine Learning
Authors: Yang Fan , Wu Yu Chuan
Published: February 2012

This paper describes how to use a posture sensor to validate human daily activity and by machine learning algorithm - Support Vector Machine (SVM) an outstanding model is built. The optimal parameter σ and c of RBF kernel SVM were obtained by searching automatically. Those kinematic data was carried out through three major steps: wavelet transformation, Principle Component Analysis (PCA) -based dimensionality reduction and k-fold cross-validation, followed by implementing a best classifier to distinguish 6 difference actions. As an activity classifier, the SVM (Support Vector Machine) algorithm is used, and we have achieved over 94.5% of mean accuracy in detecting differential actions. It shows that the verification approach based on the recognition of human activity detection is valuable and will be further explored in the near future.
Characterizations and Crystal Structure of Er Ions Doped Titania Nanofibers
Authors: Lu Ying , Hong Jin Zhong , Shao Chang Lu , Zhang Xin , Lv Ming Xing , Sun Yang Yang , Ren Jing Jing
Published: February 2012

A simple and novel method to synthesize Er ion doped titania was investigated. In this work, Er-doped titania nanofibers were prepared by the sol-gel method. Characterizations of the nanofibers were done by X-ray diffraction, scanning electron microscopy. The results suggest that crystal structures of Er-doped titania composite nanofibers were changed due to Er ions disturbing.
Research on Evaluation System of Urban Ecological Safety
Authors: Hu Yuan Dong , Fudan Guan Na , Lu Jun
Published: February 2012

The index system of urban ecological safety evaluation includes 26 indicators. The method system of urban ecological safety evaluation include data processing, key elements definition, the calculation of urban ecological safety level and standard formulation of urban ecological safety evaluation. The paper takes city Harbin for example and makes the empirical research.
Design and Realization of Automatic Feed Proportioning System Based on PLC
Authors: Li Jing , Qin Shi Ming
Published: February 2012

There is a working procedure that adding various Lucai, brine, edible oil and etc in southern Rice Noodles cooked. In order to raise the production efficiency and economize the production cost, the paper introduces the design and realization of automatic feed proportioning system in detail. It gives machine design scheme of feed proportioning device, designs idiographic metage circuit. The whole feed proportioning process has controlled by Mitsubishi PLC, expounding controlling process. The system can put various special Lucai, brine, edible oil into bowl accurately after prototyping and debugging. Automatic feed proportioning system is designed to improve productivity and save labor. It has a certain practical significance and promotion value.
WBS-RBS-Based Hydropower Projects Investment Risk Analysis
Authors: Tan Li Jun , Wang Song Jiang
Published: February 2012

Water and hydropower projects often has a huge investment, as the project management developed, more and more private capital into the projects, the complication of fundraising channels will undoubtedly increase the risks of investment. The risk identification of investment for large-scale Water and Hydropower Projects is according to the project Work Breakdown Structure (WBS) and Risk Breakdown Structure (RBS), and then use the Monte Carlo simulation method for quantitative analysis.
Research on Information Technology and Equipment for Vegetable Quality Safety Supervision
Authors: Li Jin , Zhao Chun Jiang , Qin Xiang Yang , Ma Chen , Wang Jun Jun
Published: February 2012

Vegetable quality safety is the current hot issue that arose government, social concern and global attention; it is also the key problem that must be solved for the present stage of implementation of agriculture and rural economy structure strategically adjust, enhancing produce competition ability. Based on the analysis of the key points of quality and safety of agricultural products on the basis of monitoring, this paper introduces vegetable quality safety supervision information facility equipped for engineering application, and takes the prospect of agricultural product quality safety supervision information tech90nology equipment.
A New Kind of Multiple Channels Data Acquisition Device & System Based on Sound Card
Authors: Chen Guo Fan , Wang Xiao Yan
Published: February 2012

This thesis offers a kind of multiple channels data acquisition device & system based on the sound card. The device converts input signals into frequency signals, and sound card collects the frequency signals. Then the frequency signals collected is restored into input signals by software. By doing so, it resolves the problem which the sound card can’t collect low frequency signals or dc signals. Meanwhile, using a piece of MCU controls the multi-channel analog switch, and the MCU also issues multi-path identification signals to the sound card. So the function of multiple signals collection is achieved.
Anti Trailing of ATM System Design
Authors: Zhang Ji Meng , Yang Yun
Published: February 2012

Anti trailing of ATM system use the digital double differential move probe with infrared ray and microwave detection technology.These system includes digital processing software. The core is microcontroller of AT89C51 to control the pyroelectric infrared module , microwave emission detection module, infrared control module, voice chip modules and LED warning display by the process of burning into. The signal coming from each module is processed by Micro Control Unit to complete the the ATM around environment monitoring of customer to prevent the trailing events.
Buildings on the Slope Considering Effects of Uneven Settlement of many Piles on the Structure Research
Authors: Wu Li Ming , Wang Zi Jian
Published: February 2012

Built on the slope and slope in buildings, in order to avoid a lot of digging embankment. According to the slope of potential changes, pile foundation is general unequal height. Design of such buildings in superstructure and foundation when considered separately, is to meet under normal load bearing capacity and deformation of coordination requirements. Due to the Bank's Foundation often under the influence of water level fluctuations, resulting in uneven settlement of pile foundation. Uneven settlement of foundation will inevitably lead to additional stress redistributes and superstructure of secondary internal force increases. Degree of influence on the structure of settlement of single pile has been building on the slope considering effects of uneven settlement of pile on the structure studies. This article focuses on studying two piles at the same time on the effect of settlement on the structure. For ease of study, this article to a shore in 8 layers of pile foundation in the framework, for example, using finite element analysis software ANSYS to different parts of the effect of settlement on the structure of two piles. Analysis shows that the class when the design of building structures, should fully take into account the underlying effect of settlement on the coordination of structural deformation, thus making the design more reasonable security.
A Heuristic Algorithm for Single Veichle Route Problem with Multi Time Windows
Authors: Gao Peng
Published: February 2012

Veichle route problem with multi time windows is ani mportant issue in the manufacture and combinanl optimal problem, and has wide uses in the real life. Upto the problem in the real life, this paper build the mathmatic model, and analysis the complexity of the model. A heuristic algorithm is proposed based on the model, examples and test data is descripted to prove the vality and effective of the algorithm.
Automobile Alarm System Based on Face Recognition Method
Authors: Sun Xu Song
Published: February 2012

Advanced systems for auto safety are an ongoing need in our current mobile and ever expanding society. The safety and security of automobiles is becoming an ever, difficult problem Face recognition systems have been promised to provide many different security applications. The goal of this research has been the development of an optically based computer system, which will locate and track the head, face, and eyes of a driver. The system will then determine the driver's identity and verify his/her authorization to operate the vehicle. While the car is in operation, the system will also determine if the driver is awake, sober and able to safely operate the vehicle.
Automatic Conformance Test Generation for Protocols Specified in EFSM
Authors: Xu Jun , Shu Ting , Lai Si En , Jia Yu Bo
Published: February 2012

Automatic test sequences generation can improve the test efficiency. This paper focuses on how to design and implement a conformance test sequences automatic generation tool for EFSM-based protocols. Specifically, two key technical problems are discussed in detail, which are the EFSM model construction and behaviors dynamic interpretation. For the former, the three-tier system architecture is introduced to develop a graphical EFSM editor. For the latter, a dynamic script method to efficiently interpret the dynamic behaviors of the EFSM model is presented. Based on the proposed methods, a simple prototype system for conformance test generation is developed. Experimental results show that the proposed approach is feasible.
Comparative Analysis on the Allowable Stress and Limit State Methods of Crane Structure Design Standards at Home and Abroad
Authors: Teng Yuan Yuan , Dong Da Shan , Qiu Hui Qing
Published: February 2012

This paper adopts the allowable stress and limit state methods of Chinese and European crane structure design standards(GB3811-2008 and FEM-1998 ), and illustrates correspondingly in detail the computing means on the overall checking of strength, static and dynamics stiffness, buckling of bar and plate, and fatigue. Taking a real crane as an example, according to the above three specifications, it designs the crane’s metal structure again, checks all aspects and guarantees the strength, buckling and fatigue indexes all reach 90 percent of the permissions, then comparative analyzes the new design parameters and checking indicators, combining failure probability obtained by PDS. It provides helpful and reference value for understanding the transition from the allowable stress to limit state method in design standards and the differences of theirs’ at home and abroad.
Blind Image Separation Method Based on Artificial Bee Colony Algorithm
Authors: Chen Lei , Zhang Li Yi , Guo Yan Ju
Published: February 2012

A novel blind image separation algorithm based on artificial bee colony algorithm was proposed. Negative entropy was chosen as the objective function for separation and the separation matrix was transformed using Givens rotation transform method and the number of variable need to be found reduced. Artificial bee colony algorithm was used for solving the objective function and the images could be separated successfully. Simulation results verify the validity of the method.
A Study of Flow-Induced Noise in the Volute of Centrifugal Pump Based on Sysnoise
Authors: Yuan Jian Ping , Ge Ai Xiang , Sun Wei , Fu Yan Xia , Xue Fei
Published: February 2012

The internal flow-induced noise of the centrifugal pump is essentially caused by its complex internal flow, hence the research on the pump internal flow pattern is a crucial part of studying the flow-induced noise for centrifugal pumps. The DES unsteady simulation based on S-A model was applied to analyze the noise in the flow domains which are consist of the volute and the impeller passage in the paper. The frequency domains of pressure fluctuation at monitoring points under different operating conditions for different zones were analyzed by using SYSNOISE sound processing platform. The results show that the distribution of the acoustic source which was directly associated to the pressure fluctuation of the volute face generally aggregate at cutwater with the same frequency characteristic. Field sound pressure and dipole source do not have simple linear relationship and the strongest acoustic radiation intensity appears at blade passing frequency. Pipeline method applied in flow-induced noise measurement is effective and the flow rate is one of the major factors in acoustic radiation.
Application of Fuzzy Clustering and FSM to Represent Graphic Concept Structures on Assessment Database
Authors: Chen He Kai , Lin Yuan Horng
Published: February 2012

The purpose of this study was to apply the fuzzy structural modeling (FSM) in analyzing the concept structures of algebra for 4-graders. The authors utilized the response data of 4-graders in 2007 from Taiwan Assessment of Student Achievement. After the calibrating of equating, the distributing of the abilities of task-takers was clustered into 4 groups with the method of fuzzy clustering analysis. The authors chose the vector center for sample from each group, drew the individual concept structure graphs, and analyzed the hierarchical structures of Algebra concepts. Under the frame of IRT, the study showed the structural characteristics of Algebra concepts from Taiwan pupils. Moreover, the FSM graphs of the task-takers in each group had been analyzed and compared their differences.
Based on Value Analysis Process Optimization of Air Cargo Transport
Authors: Li Zhi Zhong
Published: February 2012

Value analysis is one of the 20th century six major management tool, since Miles has created, with its value-oriented and innovative nature, and multi-disciplinary nature have a significant impact on management innovation and actively promoted. Articles will introduce the creative value analysis of air cargo processes, through functional definition and functional sorting, looking for processes to be optimized and improved operating procedures. Then, create a method of use of the program, from the internal optimization and external optimization proposed solutions, in order to achieve the optimization of air cargo process.
A New Method to Measure the Radial Flexibility of Ship Pressure Hull
Authors: Zhu Xiao Jun , Yan Fu Yu , Wang Peng , Zhu Zhi Jie
Published: February 2012

The radial flexibility of ship pressure hull directly effects the structure tension of pressure hull, so it must be measured and controlled. At present, stay bar method is mainly used to measure it in shipyards and the method has low precision and efficiency, many artificial errors. Electronic total stations (ETS) are the main equipments of precision control now and they have high precision, but are seldom used in shipbuilding. So the paper presented a new method to measure the radial flexibility of ship pressure hull with ETS and transfer station measurement method. The data measured in different stations could be transformed and dealt with. Then the plane and the projection point on the plane could be calculated in the same coordinate system. Finally the radial flexibility of ship pressure hull could be worked out according to the theory of least squares. The new method is very easy to operate and have high efficiency. Experiments showed that the method has high precision.
Design and Analysis of Surface Pressure Sensor for Colonoscopic Robot
Authors: Hu Hai Yan , Li Wei Da , Li Juan , Sun Li Ning
Published: February 2012

The colonoscopic robot with continuum structure can offer enhanced environmental interaction by deforming to fit environmental constraints. In order to improve its perception ability and avoid perforation and other kickbacks, it is necessary to integrate pressure sensors into colonoscopic robot. A surface pressure sensor for the measure of contact pressure between colonoscopic robot and colon wall is designed. The sensor is made of aluminum and is 15.6mm in diameter and 3mm in width. It consists of external ring, internal ring, connection and two resistance strain gauge. The mechanical structure of the sensor is introduced. The mechanical characteristics is analyzed and simulated by the finite element analysis software ANSYS. The experiment system is built and the data is sampled through Wheatstone bridge. The data fitting is performed based on least squares method with Matlab software. The result shows that the surface pressure sensor has advantages of good linearity and accuracy. This study lays a foundation for the practical application of colonoscopic robot.
A Coordination Method of Missile and Aircraft for Combat Use
Authors: Lv Ying , Lin Hua , Dai Ya Ting
Published: February 2012

According to the surface warship combat conditions, there are airspace confliction between ship-borne machine and missile, the study build a vector calculation model to describe the damage area between missile system and moved carrier machine. Proposed the Setting time method and adjusted course method, build the simulation to calculation and analysis to verify the effectiveness of the method.
3D Simulation of Foundation Excavation in a Subway Station
Authors: Lu Jin , Liao Xiao Fan
Published: February 2012

According to an practical construction of an subway station, the foundation excavation three dimensional model was built by FLAC3D from the need of practical engineering. The status and variation characteristics of the displacement field, deformation field and plastic failure zone were obtained. Guiding significance was provided by the simulation.
Design and Research on Key Components of a Novel Self-Propelled Chili Pepper Harvester
Authors: Qin Xin Yan , Lei Jin , Chen Yong Cheng
Published: February 2012

In this paper, a novel self-propelled chili pepper harvester is proposed. The chili pepper harvester consists of picking device, cleaning device, transmission system, re-picking device, collection bin, etc. The structural features, working principle and key components' design of the chili pepper harvester are introduced in the article. The chili pepper harvester is manufactured and assembled. Many field tests are conducted by the prototype chili pepper harvester. According to these test results, the picking rate is 99.15%, the total loss rate is 5.15%, and the damaged rate is 3.22%. The main performance parameters have been reached the design requirement.
Application of the R-Function Theory for the Bending Problem of Shallow Spherical Shells with a Dodecagon Domain
Authors: Li Shan Qing , Yuan Hong
Published: February 2012

The R-function theory is applied to describe the dodecagon domain of shallow spherical shells on Winkler foundation, and it is also used to construct a quasi-Green’s function. The quasi-Green’s function satisfies the homogeneous boundary condition of the problem. Then the differential equation of the problem is reduced to two simultaneous Fredholm integral equations of the second kind by the Green’s formula. The singularity of the kernel of the integral equation is overcome by choosing a suitable form of the normalized boundary equation. A comparison with the ANSYS finite element solution shows a good agreement, and it demonstrates the feasibility and efficiency of the present method.
Design of Automatic Sorting System of Boxed Drugs Based on Profibus-DP
Authors: Zhang Peng , Shen Min De
Published: February 2012

One kind of the reservoir gate monitoring and control system is developed, which is based on the operator station, remote control station, programmable logic controller and industrial network, to build a distributed networked control system. In this system, the position of the gate’s displacement is measured by a rotary coder that provides a Profibus-DP interface, and the reliability is enhanced. The communication program between the rotary coder and the controller is listed.
Design of a Handheld Terminal which Has Encryption and Decryption Function
Authors: Li Bao Feng , Hou Hui Juan , Cen Wei , Lv Ying Jie
Published: February 2012

In this paper, a handheld terminal is designed which has encryption and decryption function to solve the problems of relatively lower security level of the traditional terminal equipment’s transmission data in electrical communication. This handheld terminal not only can implement the screct key update and recovery, load switch controlling, charge adding, parameter setting, data reading function and so on , but also through introducing advanced encryption and decryption techniques and using security unit,, , can ensure that the transmission data was not altered in the communication and transmission data’s integrity and confidentiality was not destroyed. This handheld terminal has great practical value.
Track Handing Fusion in Data Fusion and Database
Authors: Qi Ji Yuan , Hu Xiao Jun
Published: February 2012

Track message is obtained with a lot of adopted sensors. For one sensor, the reliability may not the same in different condition. A reliability judgment matrix for each target is constructed based on the relative reliability of information offered by sensors. Then, the reliabilities of all the sensors for each target and their general reliability can be gotten. A numerical example is presented. The well reliability sensor’s information will be chose to merge with Kalman filter algorithm in tracking handling based on data fusion technique, and gain the best estimate track. According to the demand of data fusion for the data, establish a real-time database by using the objected technology to fulfill the real-time demand of fusion algorithm. And establish a history database by Relation Database. The data in data fusion system can be managed through the two databases. In this way the data fusion system can work efficiently.
The Key Technology of PDP Lighting Inspection Machine
Authors: Deng Yong , Liu Gui Xi , Chang Peng Ju
Published: February 2012

Plasma Display Panel (PDP) Lighting Inspection Machine is an important manufacturing facility in PDP production line. The key technologies of PDP Lighting Inspection Machine are discussed. Firstly, the advantages of PDP panels and the importance of researching on the PDP Lighting Inspection Machine are introduced. Then, the machine’s hardware structure including Programmable Logic Controller (PLC) control system, host computer system and visual positioning system is discussed in detail. Finally, the software implementation of the machine is also studied.
Preparation of Carbon Fiber/MoS2 Core-Shell Structure by Surface Modification and Precipitation Process in Aqueous Solution
Authors: Wei Rong Hui , Du Kai , Gong Xiao Yang , Chen Qing Dong , Yang Hai Bin
Published: February 2012

A core-shell structure material, carbon fiber/MoS2was prepared by a surface modification precipitation process in aqueous solution. A nucleation model for this structure was proposed. Coating was obtained from 10-4M ammonium molybdate. The energy band gap of MoS2calculated from the absorption spectra was about 1.97eV. CFs/MoS2core-shell structure has strong absorption in the wavelength range from 400 to 1000nm, which is well fitted to visible light of the solar spectrum. The result of thermal analysis indicates that the composite is stable below 403 °C.
Experiment Investigation into Surface Strain and Roughness of SUS304 Strip Ground by Fixed Abrasives
Authors: Han Quan Li , Zhao H. J
Published: February 2012

This present paper aims to investigate the effect of abrasive grinding on characteristics change of surface in fixed abrasives grinding. Different surface in experiment were generated in surface grinding through change of processing time while other experiment parameters remained, and those tests of surface strain and roughness of SUS304 strip were conducted. The magnitude of stress and roughness on sample after experiment increase with processing time, which is also fit for the change of the above index parameter between before and after experiment. Larger surface stress of sample, on which higher surface roughness is also seen, is found, and simultaneously, the dependable correlation between surface stress and roughness in grinding is appraently shown. Theose decsribed findings brings out direct help to researchers and practiitioners in industry engineering fields when searching for the soution of decreasing the surface stress and roughness and extending service life of product with high performance.
Fabrication and Performance of Symmetrical Gradient Ceramic Nozzles
Authors: Deng Jian Xin , Chen Yang Yang , Xing You Qiang
Published: February 2012

A model for the design of symmetrical gradient ceramic nozzles is presented. The purpose is to form compressive residual stresses at the entry and exit of the ceramic nozzle, and to reduce the erosion wear at these areas during abrasive air-jet machining. A SiC/(W,Ti)C ceramic nozzle with symmetrical gradient structure at its entry and exit was produced by hot pressing. The residual stresses inside this layered nozzle in the fabricating process were calculated by means of the FEM. The mechanical properties at individual layers were measured, the microstructure was examined. The erosion wear of this symmetrical gradient ceramic nozzle was investigated and compared with an unstressed reference nozzle. The production of symmetrical gradient structures with compressive residual stresses within the entry and exit of the nozzle has been proved to be a suitable way to obtain ceramic nozzles with superior erosion resistance.
Infrared Continuous Temperature Measurement System for Molten Steel in Tundish
Authors: Wang Feng
Published: February 2012

In order to detect the liquid with high temperature, a new kind of continuous temperature measuring system for the molten steel in continuous casting tundish was developed, combining infrared measurement with optical fiber conduction technologies. It overcomes the disadvantages of the existing disposable fast thermocouple such as intermittent measurement, frequent replacement, and experiential insertion position and depth, which can provide a favorable guarantee for the closed loop temperature-related control of the continuous casting production. It is demonstrated that the measurement lag is well solved because the unique single-layer compound outer protection tube with inner sighting tube is adopted, and the system has the advantages in long service life and high measurement precision. In addition, the cost is reduced by 20%~50% compared with the other similar products. The main performance indexes of the system are response speed 3~5s, longest continuous measuring time up to 70h, and average error ±3°C.
Physical and Mechanical Properties of Five Heat-Treated Hardwood Species
Authors: Sun Jin , Wang Xiao Bo , Wang Xiao Jing , Lin Yan , Gao Zhen Zhong
Published: February 2012

Five hardwood species (Schima superba Gardn, kapur( Dryobalanops sp.), ash (Fraxinus mandshurica Rupr.), birch(Betula platyphylla Suk.), tauari (Couratari sp.)) were conducted the Heat treatment at 185°C.. The results indicated that the dimensional stability, modulus of elasticity (MOE) increased greatly while the wettability decreased after treatment. There was a negative impact of heat treatment on MORs.
Numerical Simulation on the Temperature Distribution in Resistance Microwelding of Insulated Cu Wire
Authors: Mo Bing Hua , Zhang Xian Feng , Wu Jia Qing , Guo Zhong Ning
Published: February 2012

This paper develops a model to simulate wire-to-sheet lapped resistance microwelding (RMW) process. The model employs a coupled thermal–electrical–mechanical analysis and accounts for temperature-dependent thermophysical properties of materials, contact resistance and the Peltier effect. Results show the interface temperature between the molybdenum electrode and copper wire is higher than the faying surface. The predicted thermal distributes agree well with the experimental data. The proposed model can be applied to predict the effects of the welding parameters.
The Sustainable Development Research about Microfinance - Take the Rural Credit Cooperative of Hebei Province as an Example
Authors: Dong Li Xia , Dong Ying Cai
Published: February 2012

Micro-credit as the main channel of rural financial supply,its sustainable development has important significance.The article establishes evaluation model of the sustainable development, and take hebei province as an example, evaluates its’sustainability of microfinance project.
A Novel Composition Forecasting Model Based on Choquet Integral with Respect to L-Measure and O-Density
Authors: Liu Hsiang Chuan , Jeng Bai Cheng , Yu Yen Kuei , Ou Shang Ling , Ou Yih Chang , Tsai Hsien Chang
Published: February 2012

In this paper, based on L-measure and O-density, a novel composition forecasting model is proposed. For evaluating this new composition forecasting model, a real data experiment by using the sequential mean square error was conducted. Based on O-density, the performances of Choquet integral composition forecasting model with the L-measure, Lambda-measure and P-measure, respectively, a ridge regression composition forecasting model and a multiple linear regression composition forecasting model and the traditional linear weighted composition forecasting model were compared. Experimental results show that the Choquet integral composition forecasting model with respect to the L-measure outperforms other 5 composition forecasting models.
Application of Fracture Mechanics in Ocean Engineering Structures Quality Control
Authors: Chen Jian Ping , Hu Sheng Sun , Shen Jun Qi , Wang Bin , Li De Qing
Published: February 2012

This paper introduced the application of Engineering Critical Assessment (ECA) technology based on fracture mechanics in ocean engineering structures. The application actualities and developing trend of ECA evaluation criterion in domestic and foreign ocean engineering structures were described. The content and process of ECA evaluation at home and abroad were compared, and the key technologies of ECA evaluation in practical projects were summarized.
Optimal Design of an IPM Motor for Machine Tool Applications
Authors: Hwang Chang Chou , Chang Chia Ming , Cheng Shih Ping
Published: February 2012

This paper presents a two-step optimization of shape design for the performance improvement of an interior permanent magnet (IPM) motor. Results from the optimized motor demonstrate that the motor performs favorably with respect to minimization of torque ripple and maximization of average torque to PM volume ratio.
Effect of Strength Matching Performance on J-Integral of Inhomogeneous Welded Joints
Authors: Sun Chang Qing , Zhang Chen , He Bo
Published: February 2012

In this paper, J-integral of inhomogeneous welded joint is calculated by use of the combination of finite element method and virtual crack extension method, and the impact of strength matching on J-integral is studied as well. The analysis results show that the strength matching factor affects J-integral value greatly, that is, low matching of inhomogeneous welded joint of same steel can help to improve the ductility of the welded joint and the influence of the matching performance of dissimilar steel welded joint is more complex.
Analysis of Crack on Rail Web after Flash Welding
Authors: Li Da , Wang Gui Guo , Chen Yu , Gou Guo Qing , Liu Yan , Ji Hua , Chen Hui
Published: February 2012

A failure U71Mn rail steel was investigated by stereomicroscopic, scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and laser scanning confocal microscope (LSCM). The results show that, the crack is initiated from heat affected zone (HAZ) of the rail web. The inclusions (Al2O3, SiO2) and the holes in the rail web are the main reasons for the fracture. The deepest of the hole is 64.1μm.
Numerical Study of Effect of Polymer Additives on Heat Transport in Turbulent Rayleigh- Bénard Convection
Authors: Zheng Chen Hui , Li Chang Feng , Jiang Hua Hong
Published: February 2012

In this study, the Reynolds-Averaged-Navier-Stokes (RANS) model combined with the Cross Viscosity Equation is used, applied to the soft turbulence regime (Ra =5×105~4×107) and hard turbulence regime (Ra>4×107) of Rayleigh-Bénard convection (RBC). The relation curves between heat transport (Nusselt number) and other parameters, as well as flow pattern changes of RBC are obtained for the cases with different Rayleigh number and concentration of the polymer additive. The simulations show that the presence of polymer additive can lead to an enhancement of the heat transfer with larger effect in the hard turbulence regime than those in the soft turbulence regime. It is also shown that in the soft turbulence regime the reversal cycles are shorter than in hard turbulence regime. The symmetric vortices in the diagonal corner of enclosed space shrink and the velocities of large-scale circulation (LSC) increase accordingly.
Preparation of TS-1 Monolithic Catalysts and Activity Evaluation for Cyclohexanone Ammonization Reaction
Authors: Chang Qi , Ye Chun Bo , Li Cui Feng , Xin Feng
Published: February 2012

The Titanium silicalite-1 (TS-1)/cordierite monolithic catalysts prepared by wash coating-method were investigated by means of experiments in which we discussed the effects of TS-1 mass fraction in slurry, coating times and solvent viscosity on loading amount and adhesiveness. The results of cyclohexanone ammonization in self-made recirculating reactor showed that the activity and stability of TS-1 monolithic catalysts supported on cordierite honeycomb were better than traditional TS-1 powder in slurry reactor.
Analysis of Temperature Distribution in Rotating Arc Welding
Authors: Bai Qiang , Guo Ning , Han Yan Fei , Zhang Jing , Wang Mei Rong
Published: February 2012

Mathematical model of heat source in rotating arc welding (RAW) process was developed for investigating the heat and temperature distribution. The effect of rotating parameters on the temperature field in complex welding motion trajectory was studied. In this work, a transient three-dimensional (3D) model was established and computed by a finite element analysis computer program MARC as well as its subroutine. Comparing with non-rotating arc (NRAW) process, the width of temperature distribution enlarges, and the peak temperature of weld pool decreases. The effect of the rotating arc process becomes more and more significant with the increasing of rotating radius. In the weld center, the peak temperature increases with the rotating frequency. But in peripheral region of the weld, when rotating frequency is lower than 10 Hz, the peak temperature increases firstly and then decreases with the increasing of the rotating frequency. It is contradictory with the traditional view. Good agreement is shown between the computed results and experimental results of thermal circle in rotating arc welding process.
Analysis of Seismic Response of Heterogeneous Media: A Physical Modeling Study
Authors: Guo Nai Chuan , Wang Shang Xu , Guo Hong Wei
Published: February 2012

In order to study the wavefield response of heterogeneous structure in seismic section, firstly, we have got the 2-D P-wave data for two kinds of heterogeneous structure in the physical model of a 3-D heterogeneous sand layer. Then, we choose several typical single shot seismic records and minimum offset gathers for wavefield analysis. Finally, we show two images generated by using reverse time migration (RTM) on the recording data. Experimental results indicate that, heterogeneous structure’s information is included in every single shot record; each heterogeneity forms a diffractor whose diffraction response, which affects the imaging of the interface between the heterogeneous region and the homogeneous region, is especially obvious in the minimum offset gathers; diffraction wave could be eliminated by RTM imaging, which could reflect the position of heterogeneous structure in reality; the differences of the wavefield response of the two kinds of heterogeneous structures are mainly reflected in the divergences of the events’ scale and power of the heterogeneities.
Calculating Hydrogen Absorption on Single Wall Carbon Nanotubes with Different Radius Using the First Principle
Authors: Chen A Qing , Shao Qing Yi , Wang Li
Published: February 2012

The controllable hydrogen storage on single wall carbon is studied by using the first principle based on density functional theory (DFT). It concludes that the adsorption of hydrogen on the bare distorted single carbon nanotubes (SWNTs) can be enhanced dramatically when the single wall carbon nanotubes are rotated along the tubs axis and depend on radius of SWNTs. The binding energy decreases as the radius increase.
First Principles Calculation on Adsorption of S on Impurity Fe (100)
Authors: Luo Qiang , Zhang Zhi , Zhang Qiang , Shi Tai He , Ran Zeng Ling
Published: February 2012

Using the first principles method, which is based on the density function theory (DFT), the structures and electronic properties of S atoms are adsorbed on the Fe (100) surface for X(X is Cr, Ni, Mo, C, Mn ,Si,P and S) impurities in Fe, and their molecular orbital and absorption energies were calculated with the generalized gradient approximation. The results show that S adsorbed on H site for Cr, Ni, Mn, C and Mo impurities in Fe is stable but for Si, S and P is B site. The adsorption energy for Ni in impurity Fe is almost nearby for the purity Fe and the effect for Ni in S absorption on Fe (100) surface is very small. In order to prevent S absorption on Fe surface，we can reduce the percentage of Ni.
Vibration of Lifting Rope when Cage Is Locking
Authors: Wu Juan
Published: February 2012

Analysis of vibration characteristics when the cage is locking. Deduce vibration model by elastic lifting rope, interaction of sheave and rope. Based on step function, a wire rope vibration mode function, vibration displacement and tension solution are given. Results show that the cage locking device reduces impact and avoids the slippery rope and the security hidden danger. The vibration model of locking cage process is applied to the cage jammed situation. If the frequency during sudden jam is greater than or equal to the fundamental frequency, hoisting wire rope fracture does not occur.
Properties of ZnS Thin Films Prepared by CBD under Different Concentration of Complexing Agent
Authors: Liao Jie , Zhou Hai Fang , Cheng Shu Ying
Published: February 2012

ZnS thin films were deposited on glass substrates using chemical bath deposition. The zinc sulfate and thiourea were used as precursors along with a stable complexing agent of sodium citrate in ammonia/ammonium chloride (pH=10.5) buffer solution. The ratio of Zn and complexing agent was changed from 6:1 to 1:1 by varying concentrations of the complexing agent. X-ray diffraction (XRD), scanning electron microscope (SEM) and UV-vis spectrophotometer were used to investigate the structure, micrograph and optical characteristics of the ZnS thin films respectively. The concentration of sodium citrate has an effect on the crystalline size and crystallization. For the as-deposited thin films, the values of transmittances and Eg are about 85% and 3.8 eV respectively. However, they are decreased to 75% and 3.4 eV respectively after annealing. In addition, the concentration of the complexing agent has no remarkable influence on both the transmittance and the energy gap. The results show that the ZnS thin films with resistivity of 4.34×104 Ωcm are suitable for optoelectronic applications.
CFD Simulation of the Gas-Liquid Flow on the Ripple Tray
Authors: Jiang Bin , Li Zhong Tao , Zhang Lu Hong
Published: February 2012

The ripple tray is a sieve tray without downcomers, in which the liquid contacts with the upward gas counter-currently. The hydrodynamics performance in ripple tray columns was investigated with the computational fluid dynamics (CFD) method. Various superficial gas velocity and liquid loads were simulated for the tray with cylindrical cross sections using the Euler-Euler method. The modeling results were validated by comparing the calculated liquid height on the ripple tray with the experimental values. The developed CFD model is found to be able to predict the two phase flow patterns in ripple tray columns and provide useful information for further design of ripple tray.