bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Double Laser Sources Location System Based on Incremental PID Algorithm
Authors: Luo Ya Hui , Jiang Ping , Hu Wen Wu
Published: September 2013

Precision location technology is one of basic technologies to realize the farmland working machine automatic driving and prescription agriculture; it is an important content of modern intelligent agricultural machinery research. In order to study a low-cost and high-precision location system which can be applied in the small machine worked in the south paddy field, the study proposed a double laser sources location technology. With the known distance between two laser emitter, the dynamic emission angle of laser emitter can be acquired and the location coordinate of the moving machine can be accumulated. Then the real-time coordinate information and moving attitude also can be obtained. It lays a foundation for unmanned working machine and data acquisition from fixed-point in the paddy field. First, the principle of laser location was introduced in the paper, and it focused on the design of mechanical structure and controlling unit. Then, the automatic tracking and location experiment was carried when the system was fixed on the rice transplanter. And the experiment shows, the distance shifting of tracking curve is less than 7cm in the measurement of 100m, and the advantage of the high precision, low cost and high portability is very suitable for the location requirement of south farmland working machine.
Research on Pulse Jet Action Angle Optimization
Authors: Tian Zai Ke , Yang Suo Chang , Feng De Long , Yao Yun Zhi
Published: September 2013

To determine the action angle of is the important topics on Trajectory Correction technology.The pulse force action angle and residual impact point deviation were theoretically analyzed on the basis of traditional control strategy of pulse jets. It has been found that there may be a large residual impact point deviation when the correction ability is different. An optimization strategy for the pulse force action angle control was presented, and the method was verified by the 6-degrees of freedom trajectory simulation.
The Linkage Mechanism with Clearance Modeling Based on Neural Network and its Intelligent Control
Authors: Li Ting Gui , Xue Shao Wen
Published: September 2013

Using the traditional control method is difficult to obtain the ideal control result, because the linkage mechanism with clearance is a strongly nonlinear system, and it is difficult to establish the accurate mathematical model. In response to these problems, take the linkage mechanism with clearance for example and establish BP neural network offline modeling, on the basis of the experimental sample data. We separately applied the neural network internal model control and the parameters self-adjusting fuzzy control to reduce the nonlinear error caused by the clearance. The experimental results show that using intelligent control technology, the system stability has been significantly improved, and the system error has been reduced effectively.
The Development and Application of Electricity Embedded Software Testing
Authors: Zhang Wei , Ma Cai Xia , Mo Jian Song
Published: September 2013

This paper briefly introduced and discussed some of the mainstream embedded test tool, the purpose is to give the readers have a general understanding of current stage and development of embedded system in China. Meanwhile, this paper analyzed under the electricity industry (especially smart grid construction) application scenarios, three main modes of embedded software testing (development and testing, user testing, third-party testing) , their advantages and disadvantages and the scope of the necessary conditions and so on.
Modeling and Analysis of a MEMS-Based Thermal Emissivity Variable Thermal Control Device
Authors: Ren Da Hai , Tian Jing Feng
Published: September 2013

The study was made on a MEMS-based thermal emissivity variable micro-thermal control device to meet the requirements of the thermal control system of the spacecraft. An emissivity adjustment model for louvers was established. Main parameters that influence the equivalent emissivity of the louver were also investigated. Characteristics such as the electrostatic torque driven by parallel electrodes were modeled and analyzed. As a result, curves of the relationship between angles driven by parallel electrodes and electrostatic torques were obtained. Based on theoretical analysis, the adjustment range of the thermal emissivity was obtained for torsional micro-thermal control devices. The results showed that the properties meet the requirements for the control of space thermal emissivity.
Program-Controlled Driving Power Supply for Single-Chamber and Single-Vibrator Piezoelectric Pump
Authors: Sun Ye Ming , Cheng Guang Ming , Zeng Ping
Published: September 2013

According to driving requirements of single-chamber and single-vibrator piezoelectric pump, a program-controlled driving power supply is designed. The power supply first utilizes D/A converter and voltage-controlled oscillator to generate sine signal with adjustable frequency, then it changes the amplitude of signal by T-type resistor network. At last, it utilizes high-voltage amplifier and power amplifier to obtain a high voltage and a large current to realize drive of piezoelectric pump. Output voltage and frequency of power supply can be adjusted under control of program. Prototype of driving power supply is manufactured and its output performance is test. Experimental results show that, in power supply, waveform of the sine signal is satisfying, range of output voltage is 0-170V and range of output frequency is 5-600Hz. Power supply designed meets the driving requirements of piezoelectric pump, and also has merits of small size, light weight and low cost.
State Assessment of the Hydraulic Subsystem of the Launch Site Based on Cloud Model
Authors: Li Jian Zeng , Lu Guang Xun
Published: September 2013

Based on the excellent characteristics of the cloud model on the conversion process between irregular knowledge of qualitative and quantitative representation, judgment set with cloud model was established, a comprehensive state assessment method of the hydraulic subsystem of the launch site was proposed. Finally, put weighted deviation degree into judging cloud generator to acquire the comprehensive state.
HPSO Algorithm of Actuator Placement for Vibration Suppression of Large Flexible Space Structure
Authors: Zhou Xiang Yi , Zhang Jin
Published: September 2013

Optimal actuator placement is the key technology to be solved for active vibration suppression of large flexible space structure. According to the features of close mode and light damping, the optimal criterion derived from the controllability and observability of Grammian matrix is designed; Hybrid Particle Swarm Optimization (HPSO) algorithm is introduced to solve the problem in optimizing actuator placement, and the detail solving step is given. Compared with genetic algorithm (GA) in previous research, HPSO is better than GA in convergence rates and computing time. Based on the above optimal results, LQG/LTR control method is utilized when the large flexible structure under pulse and Gauss white noise excitation respectively. The numerical simulation results show that LQG/LTR, which has a better performance in suppressing structure vibration than LQG, can suppress the vibration of large flexible space structure and improve system robustness.
A MPTCP Congestion Control Algorithm Based on Packet Loss
Authors: Kou Lan , Wang Rui , Chen Si Rui
Published: September 2013

Multipath Transmission Control Protocol (MPTCP) is proposed by the IETF working group in 2009, can provide end-to-end multi-channel communication, can greatly increase the utilization of network resources and reliability. The study of the details is underway. Congestion control is one of the main issues in MPTCP study. Its goal is to ensure network throughput, to ensure the fairness of the network and to balance congestion .So this paper mainly studies congestion control algorithm. In terms of resource pooling, we propose a MPTCP congestion control algorithm based on packet loss. The algorithm can guarantee the network throughput and improve the fairness among users ,at the same time, the algorithm greatly achieve resource pooling.
A Resource Allocation Scheme Based on Maximum Tolerate Delay in Satellite Communications
Authors: Jin Hua Song , Yang Yong Feng , Qiu Dong Dong , Sun Yong Jiang , Liu Si Liang
Published: September 2013

Subject to the delay restrictions of different traffic, a novel resource allocation based on traffic prediction is proposed for satellite communication. Firstly, different types of traffic are queued in the buffer with partition coefficient according to the priorities. Then, an access control algorithm is implemented by traffic prediction instead of demand. The theoretical analysis and simulation results show that new algorithm can efficiently improve delay performance of multi-type traffic in satellite resource allocation.
A Survey on Information Credibility on Twitter
Authors: An Jun , Li Wei Jiang , Ji Lei Na , Wang Feng
Published: September 2013

Twitter has emerged as an ideal platform both for conversation and substantive real-time events, growing considerable concerns whether tweets are credible or not. In this paper, we concentrate on investigating the credibility perceptions of events which would generate abundant activity and significant interconnection on Twitter. We present several methods for crawling tweets set from Twitter according to certain rules. Furthermore, we conduct various experiments for assessing credibility, in which we list affluent categories of features relevant to determining credibility and prominent algorithms to improve the effectiveness for assessing credibility. And then we bring forward some existing imperfection of previous research on information credibility and further look into the future work benefit for assessing credibility precisely.
A WSN-Oriented Key Agreement Protocol in Internet of Things
Authors: Liu Tao , Guan Ya Wen , Yan Yi Qun , Liu Li , Deng Qi Chao
Published: September 2013

Aimed to the security and privacy issues which restrict the construction and development of the Internet of Things, a WSN-oriented key agreement protocol in the Internet of Things ( IOT) has been proposed . Trust management was introduced the security mechanism of IOT, the use of bilinear pairing technology, the identity-based key agreement was realized. Using the protocol not only can effectively prevent attacks from outside the network and can recognize the abnormal nodes which were captured or lapsed efficacy. Thus it can reduce communication with abnormal nodes to improve network security, extending the lifetime of the network. The distributed self-organizing key negotiation process without credible third-party management can enhance the survivability of IOT, and the network has a good scalability.
Design of Hot Issue Founding System Based on Tibetan Web
Authors: Cao Hui , Han Xiao Bing
Published: September 2013

This paper designs a hot issue Founding system based on the news pages of Tibetan website, which can automatically find the issue on the network at any period of time. Through characteristics judgments of hot issues, and will present the conditions of issue meeting to the user. Because of large-scale corpus, and hot issues for demanding high real-time, then the system divided into groups according to days, and using agglomerative clustering to cluster daily corpus, and the corpus of the selected period of time using Single -pass clustering to get issue list, then order the issues through heat calculation. Finally, through testing Tibetan corpus in 2011, shows that the system has achieved good results, and with higher value.
Electric System Security Programming Based on Fuzzy Set
Authors: Gao Ming Tao , Yin Shan
Published: September 2013

To aim at the problem of security programming of electric systems, a method of electric system security programming based on fuzzy set is presented. Firstly, the evaluation system of electric system security is constructed. We analyzed and proposed the applications of fuzzy system in electric systems. Through the experiment, this method can make a objective evaluation to electric system security programming with expert's experience.
Integral Impeller Multi-Objective Parameter Optimization of High Speed Cutting Based on the Genetic Algorithm
Authors: Huang Yun Lin , Yuan Jun Tang
Published: September 2013

A multi-objective parameter has been optimized aimed at integral impeller high speed cutting based on genetic algorithm. Productivity, production cost and the surface roughness linearly weighted, a different weighting coefficient is set for the roughing and finishing stages of the integral impeller. For rough machining, productivity and production costs are the main optimization goals; for finish machining, the surface roughness is a major optimization goal. Cross-encoding variables are coded according to the schema theorem. The results show that: using the optimized cutting parameters in high speed milling hardened aluminum alloy LY12, processing time and production costs are shortened in rough machining stage and surface roughness is improved in the finishing stage.
Multi-Robot Teleoperation Based on Distributed Virtual Environment
Authors: Gao Sheng , Chen Dong Dong
Published: September 2013

This paper studies virtual-guide (VG) models for Internet-based multi-robot teleoperation on the platform of distributed virtual environments. The proposed VG models attempt to improve operational precision and help an operator to predicate actions of other operators locating in different places. The concept of VGs is introduced by analyzing its basic principle. Two experiments are given to verify the reasonability and feasibility of the proposed method.
Kansei Quantitative Analysis and its Application to Drum Washing Machine Apperence Design
Authors: He Sai , Che Jian Ming
Published: September 2013

Kansei Engineering (KE) refers to the translation of consumers' emotional requirements about a product into perceptual design elements. The Kansei Engineering is applied to the drum washing machine aided by a variety of engineering mean.Semantic differential (SD) is applied to extract the kansei tags.Multivariate statistical analysis method is also used for data mining.The data of design elements is processed by principal component analysis (PCA) and SPSS.
The Design of Management System of Intelligent Parking Based on RFSN
Authors: Zhao Jun , Bu Xiang Fu , Qian Cheng , Wang Jun Hao , Ma Qing Po , Geng Hai Feng , Wan Jia Feng
Published: September 2013

The system uses the latest computer and RFSN induction smart card technology, with the principles of scientific, advanced, reliable and economy, and it is developed on the basis of many factors. Installing a set of import and export management facilities on the Entrances and exits of the parking lot, parking spaces will form a relatively closed space. When the vehicle is entering or exiting, the system captures images and recognizes vehicle license automatically etc,to make video surveillance of vehicles, real-time recording Vehicle access images, accounting, and so
forth. It will be an effective work to control, monitor, and manage parking lot, reducing the operating costs of the parking lot, and to prevent steal vehicle behavior, which protects the interests of management and owners.
Keywords: Program; Automation; RFSN
Study on Virtual Maintenance Training Effect Evaluation Based on Cognitive
Authors: Yin Bo , Liu Hui , Ruan Yong Jun
Published: September 2013

Research results and assessments actuality of virtual maintenance training are introduced and the shortcomings of the current maintenance training assessment are analyzed. On the basis, virtual maintenance training effect evaluation method based on cognitive is putted forward, focusing on the specific implementation methods and procedures. With a certain type of equipment virtual maintenance training system for the learning of the knowledge of the fundamentals of the structure of "high and low balance mechanism" and "direction mechanism", virtual maintenance training effect is evaluated by comparing two training means learning effect of traditional teaching methods and virtual maintenance training.
Research on the General NC System of Quasi Flexible Production Line
Authors: Zhang Yin Juan
Published: September 2013

The general NC (Numerical Control) system of quasi flexible production Line is researched based on motion control card operated by the DSP (Digital Signal Processor) and industrial PC (Personal Computer) running on system platform of Windows. The hardware platform of general NC system of quasi flexible production Line is built with industrial PC and motion control card, and the industrial PC is the upper computer. The software platform of general NC system of quasi flexible production line is compiler environment of Visual C++. Using programming technique of object-oriented and modularized, the network communication of data exchange for coordination and scheduling module in general NC system of quasi flexible production Line is built based on multi-threaded technology.
Resource Registry and Management Framework Based on LDAP
Authors: Wang Ye , Zong Shi Qiang
Published: September 2013

In this paper, resource registry and management framework based on LDAP is proposed. The function, external interface and internal structure of the framework are firstly introduced. Then, the data naming, data model, data operation, security mechanism and advantages of LDAP are introduced in detail. At last, a typical application based on the framework is proposed. The framework provides a better way to manage resource and achieve resource sharing.
The Development of Warm Room Ills's Ozone Control Machine Based on Single Chip Computer
Authors: Song Jin Hu
Published: September 2013

Realize ozonation of the air by high voltage discharge using air in the warm room as raw materials. Ozone can quickly kill the ills in the air, on the face of the plants and Passivat virus. Therefore, one kind of warm room ills's ozone control machine of simply structure with easy operation and reliable performance has been developed. warm room ills's ozone control machine is a sterilization and disinfection equipment of no pollution and residue, which development and production to prevent and control warm room vegetable aeroborne disease, Is the best technology security equipment for the production of pollution-free green vegetables instead of pesticides. This product can also be used in sterilization fields of flower,edible fungus, storage and all kinds of water treatment and other fields.
Meshing Stiffness Analysis of Gear Using the Ishikawa Method
Authors: Shi Jia Lian , Ma Xiao Gang , Xu Chang Liang , Zang Sheng Ju
Published: September 2013

Meshing synthesizing stiffness of teeth is the comprehensive effect of all teeth in the whole meshing region, which is related to elastic deformation of single tooth, comprehensive elastic deformation of a pair of teeth and overlap ratio of gear. This paper adopts Ishikawa method which is commonly used in the calculation of tooth deformation. MATLAB software is used for the programming of Ishikawa formula, and then the value and distribution of gear deformation stiffness are obtained, which realizes the purpose of reducing high-order harmonic excitation in the dynamic equation, thus providing a reference frequency to avoid resonation in low-frequency region.
A Probabilistic Routing Algorithm Based on Node Free Buffer-Utilization in Delay Tolerant Network
Authors: Huang Hong Cheng , Zhang Xi , Mao Yi Ding
Published: September 2013

This Delay/Disruption Tolerant Network(DTN) is a New Network Architecture for Communication in Restricted Condition with High Latency and Intermittent Connectivity.In Order to Solve the Problem that Messages can Not be Delivered Reliably because of Mobility and Limited Buffer Size of Nodes in DTN,a Probabilistic Routing Algorithm Based on Node Free Buffer-Utilization (NFBU)is Proposed.The Algorithm Sets Node Free Buffer Warning/excitation Threshold,through Warning/incentive Factor to Increase/decrease the Node Forwarding Probability,and Set up the Buffer Management Strategy,message Time to Live(TTL)value is Smaller,the Higher its Priority,at the same Time Remove the Oldest Message to get more Buffer Space.Simulations Indicate that the Algorithm Improves Delivery Ratio and Reduces Network Latencies in Different Node Free Buffer-Utilization State Compared with some other Routing Algorithms,and it is Highly Adaptable to Network.
Sensor Scheduling for WSN
Authors: Yan Dong Mei
Published: September 2013

In this paper, sensor scheduling algorithm tracking-oriented based on dynamic cluster and GDF is proposed. When the target run into the sensing filed of WSN, cluster is formed dynamically then Gaussian particle filter is used to predict the trajectory of target. With the target moving, some nodes are waked up to track the target and the others are allowed to sleep, so energy consumption is decreased remarkably.
Research on the Optimization and Adjustment for the Locomotive Overhaul Layout
Authors: Lv Zhen , Chen Wei Dong , Zou Xiang Li
Published: September 2013

In order to keep national economys sustainable, rapid and coordinated development, developing the railway is the strategic choice to realize the great rejuvenation of the Chinese nation. Through the optimization of productivity layout, optimize locomotives, locomotive maintenance equipment resources configuration, can not only improve the efficiency of railway transportation, but also reduce the national financial investment. This thesis studies the locomotive overhaul layout optimization adjustment method, established the locomotive overhaul layout optimization adjustment model and corresponding algorithm of the design model. Based on the analysis of the nature of the problem, makes the minimum cost as the objective function, a bi-level programming model is established, and by using iterative idea, design double iterative optimization algorithm to solve the bi-level programming model.
Numerical Investigation of Primary Combustion Zone of Aeroengine Combustor
Authors: Wang Ping , Li Yong Ze , Sun Bo , Guo Hui , Chen Yu
Published: September 2013

Method of CFD is used in this paper to simulate and calculate velocity field, temperature field and droplet track in PCZ(primary combustion zone) under the 3D two phase turbulent combustion for the ground idling, the peak, the middling and the altitude-small lever flying conditions. By analyzing the calculation results and comparing with tests, characters of PCZ are well investigated.
Empirical Study of Factors for Implementing Reverse Logistics in Pharmaceutical Manufacturing Firms
Authors: Liu Li , Xue Fan , Tang Min
Published: September 2013

This paper, based on a survey of pharmaceutical manufacturing firms in Hunan province, examines the factors for implementing reverse logistics. By factor analysis, we obtain that these factors can be divided into driving and hindering ones from both external and internal environments. Furthermore, after testing the differences of each variable by One Way ANOVA, we find that significant differences take place in terms of firm types and the existence and non-existence of a logistics sector. Finally, some suggestions are presented based on the conclusions.
Analysis of Spare Parts Demand Forecasting Considering Preventive Maintenance
Authors: Liu Hao , Zhao Jian Min , Zhao Jin Song , Teng Hong Zhi
Published: September 2013

Considering the importance of PM (preventive maintenance) in reliability engineering, the formula is given to calculate spare demand rate for the policies of age replacement policy, minimal maintenance policy and block replacement policy. And average spare demand rate was analyzed for age replacement policy, and an approximate empirical formula with PM interval and parameters of Weibull distribution was given compared to CM(corrective maintenance) and PM. Otherwise, compared to minimal maintenance policy and block replacement policy, the demand rate was analyzed in order to better forecast the spare parts demand.
Arena-Based Modeling of the Maintenance Operation for a Wind Farm
Authors: Li Huai Zhong , Jing Tong , Zhang Hong
Published: September 2013

Wind energy has become a leading developing direction in electric power. The high cost associated with turbine maintenance is a key challenging issue in wind farm operation as wind turbines are hard-to access for inspection and repair. Analysis of an onshore wind farm is carried out in this paper in terms of the operation, failure, and maintenance. Failures are categorized into three classes according to the downtime. It is found that the pitch, gearbox and generator have the most amount of downtime, while the most number of failures is from the pitch and electric system. A discrete-event model is developed by using Arena to simulate the operation, failure occurrence, and maintenance of the wind turbines, with an aim to determine the main factors influencing maintenance costs and the availability of the turbines in the wind farm.
Based on PCA that Affect China's Energy Efficiency
Authors: Tian Jin Yu , Zhao Na
Published: September 2013

Energy consumption scales have been expanding, but energy efficiency is relatively low, and its important to analysis of essential factors that affect China's energy efficiency. In this paper, via principal component analysis, make the overall comparison and evaluation on the situation of China's energy efficiency. Changes in the industrial structure and energy consumption structure are the most important factor affecting energy efficiency.
Enlightenment from the Characteristics of Domestic and International Equipment Manufacturing Industry to Jidong Economic Zone
Authors: Yan Shun Xi , Yan Yong Lu , Wang Xiao Lei
Published: September 2013

The equipment manufacturing industry is the key factor to determine a countrys international competitiveness. The paper studies the development characteristics and the status of the equipment manufacturing industry in developed countries and China. Then it puts forward four development directions of the equipment manufacturing in Jidong area: depend on advantageous industries to develop large-scale equipment manufacturing; expand rail transportation equipment manufacturing industry based on the existing foundation; form the Jidong ship and marine engineering equipment industry cluster and attach importance to the development of new equipment manufacturing.
Equal-Risk Acceptance Sampling Plan
Authors: Jiang Ren Yan
Published: September 2013

The common acceptance sampling plan needs to specify two points in the operating characteristic curve, which represent the producers and customers risks, respectively. The points are determined in a subjective way and hence may result in unfairness. This paper presents a new approach, which determines the acceptance sampling plan based on the condition that the risks of producer and customer at acceptable quality level are the same. Another condition is introduced to control the mean risk of producer. The approach can considerably simplify the design of acceptance sampling plan, and is illustrated by an example.
Financial Quality Evaluation of Listed Companies Based on Factor Analysis Method
Authors: Lin Zhi Hong , Guo Ting Ting
Published: September 2013

Financial index of listed companies is the key to understanding and evaluating the company's financial quality. This article introduces the method of factor analysis in comprehensive evaluation of financial quality, uses SPSS software for a comprehensive evaluation of electrical machinery and equipment manufacturing industry 10 listed companies financial quality, in order to provide support for investors and managers to make investment decisions and management decision.
Remanufacturing and Benefits Analysis of Construction Machinery Hydraulic Valves
Authors: Yan Chao
Published: September 2013

Lots of hydraulic valves lose efficacy every year because of the complex mechanism of construction machinery, bad working conditions and changeable objects. These invalid hydraulic valves were melted down in the oven and then reused. However, the additional value of valves is wasted, and it will consume a lot of resources. The remanufacturing industry, which is becoming more and more mature, can solve this problem. The hydraulic valve can be remanufactured by recollection and using professional technology. Here is an introduction of failure modes and remanufacturing process of hydraulic valve, and also a deep analysis to the benefits of economy, resources and environment. It turned out that remanufacturing can restore the function of the invalid hydraulic valve and shorten the production cycle. It also can save costs by 55%, save resources by 85% and save material by 90%.
The Fuzzy Comprehensive Evaluation and Research of the Executive Ability in Power Supply Company
Authors: Wu Qiao Ling , Niu Dong Xiao , Liu Chun Xiang , Fan Lei Lei
Published: September 2013

The level of enterprise executive ability has direct correlation with the survival and development of enterprise. According to the particularity of electric power enterprise development and the connotation of executive ability, the paper established a comprehensive multi-level evaluation index system for electric power enterprise executive ability in terms of executive power, executive effectiveness and executive efficiency. Then the paper quantifies the qualitative indicators and introduced the corresponding fuzzy comprehensive evaluation model. At last, the applicability of the comprehensive index system just created was demonstrated by an example calculation about one power supply company.
The Intellectual Structure Analysis of Improvisation Studies Based on a Journal Co-Citation Analysis
Authors: Gao Peng Bin , Wu Wei Wei , Yu Bo
Published: September 2013

The research of improvisation has been become an emerging management area in recent years, and the purpose of this study is to explore the intellectual structure of this research domain. A journal co-citation analysis was performed using the cited articles in the improvisation field included by Web of Knowledge database from 1997 to 2012. The journal set used was the 30 most productive journals in the field of improvisation, and multivariate statistical techniques were used to deal with the co-citation frequency matrix and correlation matrix. The results of current study show that the knowledge base of improvisation research involves multi-disciplinary with broad relations with other specialties: management, organization, marketing, innovation, information management, sociology and psychology.
Approach of Economical Efficiency of Scale for Raw Materials Inventory: A Case (MRP) in Manufacturing
Authors: Miao Xian , Liu Hong Qing
Published: September 2013

nformation transformation is important for state-owned manufacturing enterprises to improve the warehousing efficiency. Our work was: that with EDI in Intranet, applying the network database technology, designed the raw materials database and its application system for a large component supplier. Practice shows that this system realizes centralizing and processing for all kinds of contracts, suppliers, wagons, planning, bills for collection and inventory data. Thereby improve validity and timeliness of raw material delivery; reduce inventory management cost.
Research on Mechanical Gearbox Transmission Efficiency Test
Authors: Tong Jing , Zheng Jin Jun
Published: September 2013

Automobile gearbox transmission efficiency is an important parameter which can directly reflect the gearbox design and manufacturing level . This paper analysis detailed the effect factors on measurement, test method, and data processing for transmission efficiency of automobile gearbox, summed up the actual test experience whereby the mechanical transmission efficiency measurement , plays a reference and guidance role on improving test precision.
System Analysis Model for Industry Security System Elements Correlation
Authors: Li Li , Li Meng Gang , Wang Xi Fu
Published: September 2013

Industry security system is a complex giant system, madding up of multiple subsystems, and presenting features of hierarchy and complexity. Based on the industrial security characteristics and requirements, using the theory and method of system science, this paper analyzes the related issues of industry security. And the research mainly regards to industry security system components and the correlation between each element. And the model of correlation for industry security system elements is put forward innovatively, which has certain practical significance.
A Study on Supply Chain Management of Chinese Local Manufacturing Industry in the Context of FDI
Authors: Kang Can Hua , Yang Ling Ling
Published: September 2013

In the context of FDI (Foreign Direct Investment) inflow, how to obtain a comparative advantage of Chinese local manufacturing industry supply chain management in the competition becomes particularly important. In the analysis of the inadequacies of the traditional local manufacturing supply chain model and the traditional mode of supply chain modal, which are put forward by producers oriented and customer-oriented of international manufacturing management mode，and analyze Chinese local manufacturing Lean Agile Supply Chain Management mode in the context of FDI（Foreign Direct Investment） inflow
The Stress Analysis of the Sediment of Screw Conveyor of Decanter Centrifuge
Authors: Song Ruo Feng , Fang Fang , Yang Yong Teng , Zhao Lei
Published: September 2013

This paper first analyzes the stress status of sediment in the decanter centrifuge, and then through the establishment of equilibrium equation, derived equation of the hub wall and the helical blade. Finally through the above analysis of the solution and comparing the helical blade with different inclination angles, a reasonable range of some parameters of the centrifuge is acquired, provides the theoretical basis for the design of centrifuge.
The Vibrating Failure Research for One Aero-Engine
Authors: Xie Zhen Bo , Li Hong Wei , Xie Jing
Published: September 2013

Analyze the origins of the vibration according to the expressions during aero-engine running. Study the vibration principle. Create the fault tree of the aero-engine vibrating failure. And with the fault tree analyze the common vibrating failure during production process. Generalize the diagnosing and debugging-aid methods for aero-engine vibrating failure.
Analysis and Research of the Winch System
Authors: Zhang Chun Peng , Wang Qing Yan , Zhang Peng , Yu Ping , Lin Wei
Published: September 2013

With the winch widely used in the construction machinery, The people put forward the higher requirements to the technical indicators of winch system. According to the basic requirements of the winch system, the body member and transmission scheme of winch are detailed built. Then, by the AMESim software the simulation model of winch is established and solved on the static balance in order to simulate the actual operating system. As is demonstrated that virtual prototyping tends to be stable after thirty minutes.
Static Strength Analysis of Components of Flap Control System for a Certain Type of Aircraft
Authors: Zheng Feng Zhu , Cui Wei Min , Li Hong Juan
Published: September 2013

Pull rod and rocker arm are important parts of aircraft control system, its strength, stiffness and stability can largely affect the aircrafts control effect, sometimes the flight safety will be influenced [2]. A type of aircraft control system has been upgraded and modified, therefore the pull rod and rocker arm of the flap control system need to take the static strength test. Based on field test and finite element simulation analysis, this paper has the static strength of pull rod and rocker arm checked, and to verify the correctness of the finite element model and lay foundation for the optimization design of components of aircraft control system.
Simulation and Calculation of 10.6μm Laser Time Broadening and Space Broadening Characteristics in Near-Earth Dust
Authors: Yang Ni Chen , Wang Hong Xia , Zhu You Zhang
Published: September 2013

Based on the Mie scattering theory and the gamma size distribution model, 10.6μm laser scattering characteristics in dust particles are calculated and analyzed.On this basis,the time broadening and space broadening characteristics of the laser are analyzed by using Monte Carlo method.Transmittance change with the transmission distance are quantitative calculated and the time detention and space broadening characteristics of the laser passed through dust for different transmission distances are calculated and analyzed. The results show that the transmittance decreases with increasing transmission distance, and the transmittance is close to 0 when transmission distance is close to 200m; The time delay of 10.6μm laser is more significant with the increaseing transmission distance; The space broadening of 10.6μm laser is more obvious and the energy is more dispersed with the increaseing transmission distance.
The Development of Triaxial Seepage Equipment for Negative Pressure at Exit
Authors: Yuan Mei , Li Feng , Xu Jiang , Du Yu Qin , Ma Ke Wei , Li Bo Bo
Published: September 2013

Based on the existing triaxial seepage equipment, this paper choose the type of 2XZ-4 vacuum pump to provide negative pressure, type of CHF100A-1R5G-4 of Wei teng Ying transducer to control and make a constant negative pressure, and choose glass flowmeter to measure the flow of coal bed gas to explore the gas migration in coal reservoir during gas drainage. The triaxial seepage equipment after transformation can provide steady negative pressures on the range of-0.075MPa to-0.085MPa.The laboratory tests showed that the equipment can be used to conduct triaxial seepage experiments at different effective stress, different temperature and other conditions for negative pressure at exit.
Analysis of Non-Linear Dynamic on Unsteady Oil-Film Force Rotor-Stator-Bearing System with Rub-Impact Fault
Authors: Liu Gui Zhen , Yu Ying , Wen Bang Chun
Published: September 2013

Established the unsteady oil-film force with rub-impact fault of rotor-stator-bearing system mechanical models by using Lagrange equation, Application of numerical analysis to study it, concluded that the rotor system in frequency as the only incentive system control parameters of orbit and bifurcation diagrams; analysis of the nonlinear behavior of the response of the system and the failure mechanism, provide a theoretical basis for the safe operation of the rotor system and fault diagnosis. The results show that, when the excitation frequency as the only control parameters, the system exist periodic motion, quasi periodic motion and chaotic motion etc abundant nonlinear phenomena.
The Rigid-Flexible Coupling Dynamic Condition Analysis of New Type of Pipe Racking Manipulator
Authors: Wang Qing Yan , Wan Xiao Peng , Sha Yong Bai , Piao Chong
Published: September 2013

This paper introduces a new type of pipe racking manipulator system, which is a very important link for the automatic drilling platform. 3D model of the system was established in the Solidworks, then imported to the ADAMS to complete the establishment of the rigid-flexible coupling model. The response of motion output, the change of the main connecting rod tension, and so on, was analyzed in ADAMS. The results show that the elastic deformation of main connecting rod has an very important influence up on the whole system dynamics condition, the rigid-flexible coupling model can correctly reflect the dynamics condition of the new type of pipe racking manipulator.
Based on the Particle Swarm Optimization of Truck Crane Telescopic Jib Optimization and Implementation
Authors: Xu Ge Ning , Hou Xiao Yan , Dong Qing
Published: September 2013

The mathematical model of the telescopic jib is set up with the weight of the telescopic jib as optimization objectives, the strength,stiffness of telescopic jib, the local stability of the web as the constraint conditions. An Optimization program is developed based on the Particle Swarm Optimization Algorithm and constraint conditions and design parameters is being analyzed. The design variables are optimized to reduce the weight of the telescopic jib. It is shown in the engineering real example that the particle swarm optimization algorithm for the optimization effect of telescopic jib is obvious. The Optimization program introduced has a practical value.
A Study of the Nitrogen-Containing Heterocycles on Copolyimide Properties for Proton Exchange Membranes
Authors: Li Yu Han , Wang Wei Jian , Chen Yu Fei , Wang Lei
Published: September 2013

Containing pyrimidine and pyridine monomers were incorporated respectively into the main chain of a sulfonated polyimide in order to investigate the effect of nitrogen-containing heterocycles on membrane properties such as water uptake and proton conductivity. With increasing content of the nitrogen-containing heterocycles, water uptake of membranes and dimensional changes remarkable decrease. The copolymer showed higher thermal stability (desulfonation temperature up to 330 °C) and reasonable good mechanical properties. These membranes also showed higher proton conductivity, which was comparable or even higher than Nafion 117.
Aeroelastic Tailoring of Blended Composite Panels with Lamination Parameters
Authors: Jin Peng , Song Bi Feng , Zhong Xiao Ping
Published: September 2013

An optimization method for blended composite panels with aeroelastic constraint is presented in this paper. On the basis of composite panel sub-region division, the lamination parameters of a guide laminate and length indicator of each ply of the guide laminate are introduced as design variables using parallel genetic algorithm (GA) for optimization. For each individual, the inverse problem of obtaining laminate configuration to target the lamination parameters is solved by another GA. The method of defining design variables can reduce the number of design variables obviously compared with previous work. And the numerical results indicate that the present method is capable of producing fully blended designs of composite wing with aeroelastic performance improvement and weight reduction.
Effect of Nanometer Magnesium Oxide Addition on the Cast Microstructure of X80 Pipeline Steel
Authors: Wang Jian Ming , Liu Yang , Liu Yan , Ma Qian He
Published: September 2013

The pipeline steel as an application in pipeline construction must have good comprehensive mechanical properties due to the harsh environment of the pipeline engineering. So this experiment takes the X80 pipeline steel as the research object, the thermal stability second phase particles which would not be dissolved or aggregated at high temperature will be expected by means of adding nanomagnesium oxide into the steel with the method of carrier dispersion addition. The effect of nanometer magnesium oxide addition on the cast microstructure of X80 pipeline steel was analysed. The results show that the cast microstructure is consist of the ferrite and a small amount bainite. And the bainite is distributed at the boundary of the ferrite grains. When adding 0.02 wt% nanometer magnesium oxides, the number of bainite increases significantly in the cast microstructure, which is mostly distributed at the boundary of the ferrite grains.
Electromagnetic Wave Absorbing Properties of Glass Fiber Reinforced Cement Composites with Special-Shaped Structure Surfaces
Authors: Zhang Yue Fang , Hao Wan Jun , Li Bao Yi , Duan Yu Ping , Liu Shun Hua
Published: September 2013

In order to reach high electromagnetic wave absorption property, here we developed a cement composites building materials. Special-shaped structure surfaces have been designed to make the continuity change of impedance and increase the incident times for electromagnetic wave. Different ratio of flexible glass fiber were introduced to adjust the impedance matching characteristics of the composites and to attenuate the incident wave by scattering. As the concentration of 9% glass fiber and the surface of rectangle, the reflectivity reached the highest in the absorber with 20mm thickness. the lowest reflection loss of-15.8 dB was obtained at 8.9GHz, and the effective absorption bandwidth (less than-8 dB) reached 12 GHz in the frequency range of 1.7~18 GHz. The new material can be used for building indoor electromagnetic radiation protection.
High Temperature Annealing Amorphous Hydrogenated SiC Films for the Application as Window Layers in Si-Based Solar Cell
Authors: Hong Rong Dun , Chen Xia Ping , Huang Qian , Xie Yan Nan , Wu Shao Xiong , Zhang Zi Feng , Wu Zhengyun
Published: September 2013

Amorphous hydrogenated silicon carbide (a-Si1-xCx:H) films were deposited by plasma enhanced chemical vapor deposition and subsequently annealed in N2 atmosphere at 1100 °C. The effects of high temperature annealing on the film’s optical and structural properties were systematically analyzed. It was noted that after high temperature annealing, amount of Si-C bonds increased significantly and SiC nanocrystalline was formed on the surface of the film, which resulted in an increasing refractive index in wavelength range of visible light, a decreasing absorbance index (wavelength<433.5 nm) and an increasing optical bandgap of the film. The changes of the optical properties illustrated that the performance of Si-based solar cell with a-Si1-xCx:H window layer could be improved by high temperature annealing.
In Situ Synthesis of TiC-TiB2 Composites via High Energy Ball Milling and Pressureless Sintering
Authors: Luo Ping , Dong Shi Jie , Xie Zhi Xiong , Yang Wei , Yangli An Zhuo
Published: September 2013

TiC-TiB2 composite ceramics were successfully fabricated via planetary ball milling of 72 mass% Ti and 28 mass % B4C powders, followed by low temperature sintering process at 1200°C. The microstructure of the ball-milled powder mixtures and composite ceramics were characterized by Differential thermal analysis equipment (DTA), field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). The results showed that the ball-milled powder mixtures (Ti and B4C powders) were completely transformed to TiC-TiB2 composite ceramics as the powders were milled for 60 h and sintered at 1200°C for 1 h. The formation mechanism of the TiC-TiB2 composite was discussed. The high energy ball milling and necessary sintering for the powder mixtures plays an important role in the formation of the composites.
Analysis on Fracture Accident of the Roll and Universal Joint
Authors: Wang Xi , Xu Chang Liang
Published: September 2013

The fracture accident of roll and universal join are analyzed, and universal spindle forked joint with finite element analysis is analysed, the stress distribution and maximum stress value is obtained. In the impact power load caused by the roll biting stopping is calculated in detail, and the largest actual load and maximum stress in possible is calculated, explaining the cause of fracture of the important parts such as universal spindle forked joint, and putting forward the improvement opinion for the equipment design and using.
Studies on Mechanical and Thermal Properties of Epoxy Resin Modified by Fluorine-Containing Silicone
Authors: Fang Cheng , Guan Dong Bo , Yao Wei Guo , Wang Shou Jun , An Hui
Published: September 2013

The epoxy resin was modified with the mixture of α,ω-dihydroxy poly-(3,3,3-trifluoropropyl) siloxane (PTFPMS), KH560 and stannous octoate. KH560 can react with PTFPMS and also epoxy resin curing agent. The two reactions were characterized by FI-IR. The modified epoxy resin was characterized by FI-IR. The result showed that fluorine-containing silicone had been successfully introduced into the epoxy system. The mechanical and thermal properties of the modified epoxy resin were analyzed. The results showed that with the increase of PTFPMS the impact strength of epoxy resin increased, hardness and bending strength correspondingly reduced, slight decrease in the glass transition temperature.