bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research of Medical Equipment Management Based on JCI Standard
Authors: Huang Juan , Gao Peng , Guo En Yu
Published: March 2013

Abstract: JCI standard, regarded as the world medical treatment service criteria, represents the highest level of hospital service and hospital administration. Patient- centered, JCI establishes appropriate policies, system and process to encourage continuous quality improvement. The hospital medical equipment management department need improve the level of medical equipment management and we have carried out preventive maintenance (PM) of medical equipment according to JCI acquirement. Through JCI certification process, the medical equipment safe use has got further protection with more medical safe of patients, lower risk of medical institution and clinical medical treatment.
Anchorage Technology of the Umbrella-Shape Soil Anchor
Authors: Xia Hong Bing , Zhang Lei , Zhang Yi Jun
Published: March 2013

For shortcomings of more construction process ,long time of construction and no immediately bearing to soil anchor of steel stranded packed by cement, it is advanced the inside-opened umbrella-shape soil anchor. It is introduced structure of the soil anchor, calculating of jacking force, anti-pulling force and construction of the umbrella-shape soil anchor.
An Equilibrium Analysis of the Rent-Seeking Contests in Infrastructure Construction
Authors: Wu Chang Lin , Liu Chang Chen
Published: March 2013

A rent-seeking contest model is established to analyse the rent-seeking behaviors in the bidding process of infrastructure constructions. The solution of the model shows that if we want to reduce the phenomena in the bidding process of infrastructure constructions, the punishment efficiency on the bureaucrats must be no less but do not need to be higher than a certain number. So if we want the bureaucrats to reject the rent-seeking behaviors more thoroughly, we must lower the cost for the supervisor to check the contest and increase the bonus for the supervisor to find out the rent-seeking behaviors so as to increase the efficiency of the anti-corruption institution.
Research on the Power Converter for Tidal Energy Generation
Authors: Hu Zhen Xing , Li Ming
Published: March 2013

As a kind of renewable energy with abundant reserves, safety cleanliness and strongly predictability, tide energy generation technology has become a hot spot in the field of ocean energy development technology. The basic control scheme of the tidal energy generation system is introduced and working process of the three-phase single-switch Boost PFC converter is analyzed in detail. The simulation results show the validation.
Study on Influence Analysis of Vehicle Steering Gains Based on ADAMS/Car of Suspension Torsion Bar and Anti-Roll Bar
Authors: Liu Jing Zhong , Jiang Fan
Published: March 2013

In order to study the effect of stiffness of the suspension and anti-roll bar on the vehicle handling performance, and provide reference for suspension design and adjustment afterwards, two virtual prototypes and their variants without anti-roll bar and front suspension assembly anti-roll bar, were structured in ADAMS/Car. Through simulation test with input of steering wheel angle step, the curves of effect of angle stiffness of front suspension torsion bar and anti-roll bar on vehicle steering gain were obtained. On two models, steering gains respectively produced about 20% and 1% decline of the range of experience while the angle stiffness of torsion bar increased from 0.5 to 2.0 times of the base stiffness; steering gain respectively produced about 10% increase or 1% decline of the range of experience while the angle stiffness of anti-roll bar decreased from the base angle stiffness to 0 or increased to 2.0 times of the base stiffness.
Analysis and Simulation on the Influencing Factors of Braking Force for Permanent Magnetic Brake
Authors: Yao Ming , Wang Liang
Published: March 2013

The structure and working principle of permanent magnetic brake were introduced and the main factors of influencing braking ability of the permanent magnetic brake were analyzed with theory formula. By using of software as Ansoft, an finite element simulation model for magnetic brake were built up, and compare simulate value with theoretical one express that they have better consistency. Based on the simulation model, influencing factors of the braking force about permanent magnetic brake were analyzed, and the simulate results express that the height of gap between brake and track has a great influence on the braking force, so it must pay much more attention on brake design.
Finite Element Modality Analysis of Face Gear
Authors: Wang Zhi , Chen Qing , Lin Jia Chun
Published: March 2013

For improving the dynamic characteristics and reliability of the face gear, the finite element of the face gear was established with NX Advanced Simulation based on the theory of vibration mechanics and finite element method. the former 12 ranks of natural frequencies and shapes were calculated by using NX. Nastran solver, The results provided a direct theoretic basis for improving the design of the face gear. And it laid a foundation of dynamic response calculation of face gear at the same time.
Non-Dimensional Modeling and Simulation Analysis of Air Powered Engine
Authors: Song Rong Zhi , Fu Xiang Heng , Cai Mao Lin
Published: March 2013

Environmental pollution and energy crisis urge people to explore new power devices without burning fossil fuels and pollutant emission. Air powered engine (APE) is among these power devices. The medium and power source of APE is compressed air whose expansion makes it possible for APE to output work. Based on the principal and working process of APE, the mathematic model is established and afterwards made dimensionless. On the basis of the simulation of the non-dimensional mathematic model, the influences of the non-dimensional cylinder stroke and Kagawa coefficient on APE’s performances are analyzed
The Matching Design and Performance Simulation of Transmission System Parameters of an Electric Forklift
Authors: Cui Sheng Min , Xu Bo , Pan Wen Feng , Liu Xin Kui , Zhang Fang
Published: March 2013

The calculation method for transmission system parameters matching of an electric forklift powered by zinc-air fuel battery was raised according to the electric forklift dynamic requirements. And the method was introduced by determining parameters of driving motor, battery and gear ratio. A certain domestic electric forklift was used as an example to match its designing transmission system parameters. The power performance is simulated using the simulation software at the same time. The results show that the electric forklift dynamic performance meets the design requirements, and the application of zinc-air fuel cell to electric forklift truck is feasible.
The Modeling and Simulation of Ferrite Orthogonal Core Controllable Reactor Based on Matlab
Authors: Zhang Wang Fu , Gu Wei Si
Published: March 2013

The principle and structure of ferrite orthogonal core controllable reactor(FOC-CR) were discussed. The analysis of FOC-CR's magnetic equivalent circuit and basic equations was presented. Based on these, this paper establishes the relationship of FOC-CR's input voltage and flux through a odd polynomial assumption of MMF-Flux and gives a simulation model of FOC-CR in Matlab by using S-function.The modeling method is accessed from the result of both current wave and control characteristics of simulation model and experimental prototype.
Error Modeling and Identification Technology for Circular Path of NC Machine Tools
Authors: He Zhen Ya , Fu Jian Zhong , Yao Xin Hua
Published: March 2013

An error mapping modeling and identification technology for the circular path test of NC machine tools is proposed. First, geometric error modeling of the NC machine tool was established and the theory of the laser measurement method was introduced. Then through further analyzing the influence of the geometric errors to circular path deviations, the error items were identified, such as the displacement errors, backlashes and squareness errors. Finally measurement and compensation experiment of circular path was conducted. The experimental results show that the geometric error modeling is feasible, and the measurement method can be set up easily and rapidly, even can be used to measure smaller radius circular path under a high feed rate condition. After compensation, the accuracy of the circular path of the machine tool is improved by 50.88%.
Research on Simulation of Electronic-Controlled Pneumatic Regenerative Braking System
Authors: Wang Jun , Huang Jian , Qi Zhi Quan
Published: March 2013

In order to improve braking stability and energy recovery ability of electric buses, a new-type electronic-controlled pneumatic regenerative braking system for electric buses was designed. The regenerative braking system controls pneumatic braking force of front and rear wheels by high-speed solenoid valves, which could coordinate mechanical and regenerative braking force effectively. A simulation model of electric bus braking process was established, as well as regenerative braking control strategy. Simulink and AMESim joint simulation analysis of braking process of electric bus was run. The results show that energy recovery of the new-type regenerative braking system is effective and braking control strategy is reasonable.
Power Tracking of the Hybrid Vehicle Based on Hidden Markov Model
Authors: Fang Shu , Xue Lin , Wang Li Jing
Published: March 2013

Power tracking is the foundation of power allocation of hybrid vehicles, the error of prediction in power tracking is also influent a lot on the steady of battery’s state of charge (SOC ) level. In this paper, driving modes of all-terrain robot have been discussed, a new power tracking model based on Hidden Markov model (HMM) was proposed, in this model the working mode is divided into acceleration mode, deceleration mode, even pace mode, mutation acceleration mode and mutation deceleration mode due to the velocity variation, in each mode we build different control strategy for the battery management, such as regenerative braking or engine-generator power unit (IGPU) export power, and those strategy would keep the SOC in a constant interval, in which the battery has a excellent charge-discharge properties. A power prediction model based on HMM has also been set up due to the historical data. A simulation which the velocity curve was simplified as a sine-wave has been made, and the true power curve and predicted curve were compared, the error of the prediction is allowable.
Effect of Polymer on Antifreeze Properties of Cement Mortar
Authors: Jin Yu Jie , Xiao Li Guang , Luo Feng
Published: March 2013

Owing to the disadvantages of traditional mortar with poor antifreeze property，low adhesive strength and short durability in the cold region of China, the facing tiles often fall off and lead to the lost of decorative effects and protective effects. In this article，a new type of mortar for exterior wall facing tile，polymer cement mortar modified by polymer, is introduced. The advantages of the new mortar are: (l) Better frost resistance，which is reflected by stability after one hundred cycles of freezing and thawing; (2) Higher adhesive strength (2.0MPa); (3) Better permeability resistance and longer durability. It is believed that an ideal building mortar for the resistance of frost damage and suitable for exterior wall facing tile.
Influence of Calcium Added Slag on the Strength and Water-Repellency of Magnesium Oxychloride Cement
Authors: Jin Yu Jie , Xiao Li Guang , Luo Feng
Published: March 2013

The influence of dosage of calcium added slag on the strength and water-repellency of Magnesium oxychloride cement was studied in this paper. The results indicated that the compressive strength of magnesium oxychloride cement enhanced while the flexural strength remained unchanged when the dosage of calcium added slag between 5%-30%. The compressive strength of magnesium oxychloride cement was 110.0 MPa when the dosage of Calcium added slag was 20%, which increased the strength of 17%. The calcium added slag significantly improved the water-repellency of Magnesium oxychloride cement. The softening coefficient of magnesium oxychloride cement was more than 0.82, and the highest is 1.07.
Mathematical Model of Unidirectional Solidification with Mushy Layer
Authors: Li Xiang Ming , Wang Zi Dong
Published: March 2013

The general mathematical formulation under unidirectional solidification with mushy layer is developed. For the steady state of solidification, concentration and temperature fields in the mushy region are given as functions of a solid volume fraction. The nonlinear model of solidification in mushy zone is changed into system of the second order ordinary differential equation with free boundary conditions, which is solved using numerical calculating method. Solid volume fraction at the solid-mush interface is also obtained. For fixed control conditions, mushy layer width of Fe-Ni alloy in unidirectional solidification is predicted.
The Higher Order Crack Tip Fields of Exponential Gradient FGMs Plates with Reissner’s Effect
Authors: Dai Yao , Chong Xiao
Published: March 2013

The Reissner’s plate bending theory with consideration of transverse shear deformation effects is adopted to study the fundamental fracture problem in functionally graded materials (FGMs) plates for a crack perpendicular to material gradient. The crack-tip higher order asymptotic fields of FGMs plates are obtained by the asymptotic expansion method. This study has fundamental significance as Williams’ solution.
Thermal Stress Analysis of Silver Welding Spot on Solar Cell of Space Solar Array
Authors: Zhang Shu Jie , Zhang Yu Han
Published: March 2013

Cyclic changes of temperature in space may cause thermal deformation and thermal stresses at the silver welding spots on solar cells, which result in the solar array work abnormally. According to the temperature conditions in the thermal vacuum, the thermal stress and deformation at silver welding spot that between solar cell and inter-link chip were analyzed. The result shows that thermal cycling can make the sliver welding spot separated or contacted, which cause the solar array work wrong. The phenomenon of thermal vacuum reliability test was corresponding with these results. This paper could offer some references for the design and manufacture of solar array in the future.
Theoretical Analysis on the Tribological Properties of HTGR-10 Graphite
Authors: Liu Sheng , Sheng Xuan Yu
Published: March 2013

The friction contact modals on the friction contact are summarized here. Based on Finite Element Method, the contact pressure on rough surface is calculated. The influence of the worn surface on the distribution of contact pressure is also investigated. According to our experimental result of graphite wear rate, we estimate the wear of graphite pebble used in HTGR-10. It shows that the 80% graphite will wear out in 10 years running time.
Computational Simulation on the Material Basis of Sini Decoction in Treating Coronary Heart Disease
Authors: Tao Wei Ye , Wang Ning , Zhang Qi Rui , Huang Mao Sheng
Published: March 2013

Sini Decoction is a powerful prescription which has a curative effect. Its significant effect had been attracted by the ancient medical attention. In order to provide better services in health care and provide better clinical efficacy, it is necessary to reveal the pharmacodynamic material basis of Sini Decoction for certain disease. We conducted computational simulation of Sini Decoction in treating coronary heart disease based on computational chemistry to reveal treatment mechanism and pharmacodynamic material basis. The results show that Sini Decoction’s effect on coronary heart disease is based on the active ingredient groups. Hundreds of small molecules act upon coronary heart disease associated with different targets, this makes the coronary heart disease accept systematic, comprehensive prevention and treatment.
Indirect Adaptive Fuzzy Controller for LEGO Mindstorms NXT Two-Wheeled Robot
Authors: Chen Jen Yang , Wu Ter Feng , Tsai Pu Sheng , Lian Kuang Yow
Published: March 2013

An indirect adaptive fuzzy controller is proposed to control the LEGO Mindstorms NXT Two-Wheeled robot in this paper. The dynamical model of the robot, LEGO Mindstorms NXT, is derived from Lagrange of kinetic and potential energies. Based on the developed model, two fuzzy systems are first used to approximate the grey functions in the developed model, and then the adaptive fuzzy controller is designed. Adaptation laws for the above fuzzy systems are derived from the Lyapunov stability analysis. According to the stability analysis, the developed control system guarantees that the system tracking performance and the error convergence can be assured in the closed-loop system. Finally, we apply the proposed fuzzy controller to balance the LEGO Mindstorms NXT two-wheeled robot.
Analysis of Tire Stiffness on Vehicle Handling Performance Based on Adams/Car
Authors: Ding Shi Qing
Published: March 2013

The MacPherson suspension mode is established by Adams/Car (vehicle multi body kinematics and dynamics software). The influence of the vehicle tire stiffness on vehicle handling performance is investigated by different tire stiffness. This study has certain guiding sense in the new vehicle development and auto fancier’s vehicle modification.
Based on the Homotopy Analysis Method to Solve the Klein - Gordon Equation
Authors: Li Hai Yang , Wang Ting Ting , He Xi Qin
Published: March 2013

This paper applies the homotopy analysis method to solve Klein-Gordon equation, Firstly, structure a zero-order deformation equation. Then get the formal approximation of the model from high-order deformation equation and prove the effectiveness of the solution in the end.
Automatic Swing Door for a Passenger Car by Using Parallel Force/Velocity Actuator (PFVA)
Authors: Park Min Kyu , Rabindran Dinesh , Tesar Delbert , Lee Byoungsoo , Sung Kum Gil
Published: March 2013

A vehicle's door is frequently used by a driver or passengers. When a vehicle is parked at incline, it is not easy to open or close doors because of gravity force and external disturbances. Moreover, there might cause a safety problems for a weak or a disabled person. Therefore, there is increasing demand for automation of vehicle's door. In this study, an automatic swing door mechanism for a passenger car is proposed by using a parallel force/velocity actuator (PFVA) based on a Dual-Input-Single-Output (DISO) framework. PFVA has two distinct actuators. One is force actuator(FA) with a low reduction gear train, the other is velocity actuator(VA) with a high reduction gear train. It can be effectively used in combining velocity control with force compensation application. First, we formulated a kinematics and a dynamics of automatic swing door system with PFVA as input, and then a simulation environment was developed for a feasibility test by using a kinematic and a dynamic model. Finally, a velocity control with force compensation was performed by using the developed simulation environment. VA was faithfully followed a reference velocity trajectory for opening and closing a door, and FA was able to compensate a gravity torque and an inertial disturbance torque coming from the VA.
The Inverse Kinematics Analysis of 3-RPS DOF Parallel Mechanism
Authors: Liang Xiao Dong , Li Xian Fei , Tang Yi
Published: March 2013

In the paper, by analysing the inverse kinematics of the 3-RPS DOF parallel mechanism, establish the calculation equation between rotation angles and reference point position vector, deduce the length formula of each electric cylinder. With the help of MATLAB, calculating the corresponding rotation angles of the arbitrary reference point and the length of each electric cylinder, which is within the motion of the platform, then getting the kinematic posture, which proved to be correct and feasible.
Modeling of an Object Manipulation Motion Planner and Grasping Rules
Authors: Dzitac Pavel , Abdul Md Mazid
Published: March 2013

This paper presents the development of a Motion Planning Module for object manipulation, which is a part of previously developed robotic grasping and manipulation controller. The Motion Planning Module consists of a sensing processor, decision making module, instinctive controller, motion planner and a planned motion controller. Details related to the design and modelling of the motion planning module have been offered. Results of experiments on human grasping rule, suitable for the grasping and manipulation controller, have been discussed. The output of this research may be useful to those developing motion planning strategies for their grasping and manipulation controllers.
A Simple Monitoring Network System of Wireless Sensor Network
Authors: Xu Jin Jin , Su Sheng Jun , Yuan Ming Hui
Published: March 2013

A SSNS (simple sensor network sniffer) is used to analyze and evaluate the Wireless Sensor Networks (WSN) effectively. SSNS is designed to monitor IEEE 802.15.4 protocol frame, which based on the Ethernet. Unlike the existed monitoring system, our design is much simpler and needs less resource. It is analyzed in this paper that the monitor network framework, time synchronization, and analysis program design. The results show that SSNS works stably, and can real-time display the frame monitored and reflect the dynamic change of WSN.
Accurate Experimental Method for Measuring Electronic Number Based on Force Balance Theory
Authors: Tan Zu Yan
Published: March 2013

A simple physics experiment method for measuring number of micro power electronics is designed in this paper. Based on simple mechanical balance theory and optical reflection theory, the method accurately transforms the measurement of electronic number into the length measurement and deduces the formula for measuring micro-power. And the electronic number can be attained with the power of one single electron. The experimental error can be controlled to less than 100e.
An Ultra-Low Frequency Vibration Sensor Realized by Using the Magnetoelectric Speed Sensor
Authors: Yuan Zhang Yi , Dong Ke , Qian Yu Xia
Published: March 2013

Ultra-low frequency vibrations are ordinary physical phenomena, and absolute vibrant sensors are usually used to detect them. The author presents a method that using magnetoelectric speed sensor to detect ultra-low frequency vibrations. With cascade correcting circuit, the lowest frequency that can be measured will be less than 0.5Hz while the best damping is maintained. The author has systematically analyzed the correcting circuit, transfer function, theory of operation, and the difference between output characteristics before and after correcting to the ultra-low frequency sensor.
Design of Monitoring and Controlling System for Aquaculture Based on Wireless-Embedded Technology
Authors: She Yu , Yang Jun , Ya Gang
Published: March 2013

A parameter monitoring and control system is designed in this paper. Hardware is composed of the on-site data acquisition model and remotely display and operating model, which communicated through wireless technology. It monitors the aquaculture parameters (including temperature, PH and dissolved oxygen (DO) concentration) on-line, and water pump or air blower are controlled depended on the value of the parameters. Software is designed respectively for each model, temperature compensation is used in the control system. Experiments show that monitoring and control system for aquaculture had excellent effect, it could reduce investment and human capital in aquaculture production.
Dynamic and Static Characteristics Analysis Study of Hot-Wire Probe in Constant Temperature Model
Authors: Wei Qing Yan , Zhang Tian Hong
Published: March 2013

Lumped and distributed dynamic/static models of constant temperature hot-wire probe are established according to heat balance principle. Dynamic and static characteristics of hot-wire probe are analyzed in terms of hot-wire probe sizes, control circuit parameters and flow velocity.Simulation results show that reliability and stability of the hot-wire probe depend on bias voltage.The dynamic and static characteristics of hot-wire probe refly on the ratio of length to diameter ratio crucially.Once the ratio exceeds 300, heat conduction terminal loss can be ignored. When over-heating ratio of hot- wire or flow velocity increases, heat conduction terminal loss can be omitted as well .Besides frequency response of hot-wire probe can be improved simultaneously.The above conclusions can provide guidance in the improved design for hot-wire probe and its control-circuits.
Online Identification for Aerodynamic Parameters of the Damaged Aircraft
Authors: Wei He Ping , Yang Ling Yu , Zhang Jing , Shen Gong Zhang
Published: March 2013

Based on the wing damaged aircraft for background, the online identification method of mutational parameters was studied. After structure damaged, the symmetry of the aircraft was broken, causing the pneumatic structure of the vertical and horizontal highly coupled. To identify the aerodynamic parameters, firstly aerodynamic forces and moments were estimated as the output data of identification. Then the model of identification was selected according to the coupled pneumatic structure. Finally an identification method called Limited Recursive Least Squares (LRLS) was introduced, in which forgetting factor, weight matrix and limit item were used. The simulation results show that this method is capable to resolve the problem of strong coupling and sudden changing, while meeting the real time and accuracy requirement of online identification.
On-Line Measuring Method and System Design for the Deformation of Low Pressure Casting Aluminum Wheel Blank
Authors: Zhang Tian Yang , Sun Jia Song
Published: March 2013

During the production of the low-pressure casting aluminumwheel hub, the head face deformation and axial deformation of the casting blank are always happened due to various factors.The casting wheels beyond tolerance are considered as waste products with no need for further machining. Traditionally, the measurement of the deformation is usually static and by handwork,which limits the accuracy and reliability. This paper introduces anon-line automatic measuring system for casting wheels based on laser measuring technology. The configuration of the system and measuring method are presented in detail. Test results showed that the system could meet the measurement requirements: the whole measurement process operated quickly with the total time of 30s; the dimensional accuracy reached 0.02mm while the measurement error of the deformation was within 0.04mm. The system achieves better repeatability and reliability compared to the manual measurement.
Study on Driving Technology of Piezoelectric Solid-State Micro Gyroscope
Authors: He Yong Song , Wu Xiao Sheng , Zheng Fu , Chen Wen Yuan , Zhang Wei Ping , Cui Feng , Liu Wu
Published: March 2013

In order to compensate the noise brought by piezoelectric gyroscope or external environment and track the resonance frequency, Closed Loop Driving Circuit (CLDC) of piezoelectric solid-state micro gyroscope is proposted in the paper which will stabilize the driving voltage value and keep the resonance frequency tracked. CLDC mainly contains Phase Lock Loop (PLL) circuit, Automatic Gain Circuit (AGC). Experimental results show that the fluctuation of reference voltage is within ±7mv, while the fluctuation of reference voltage in Open Loop Driving Circuit (OLDC) without noise compensation is ±23mv. The frequency of CLDC drifts within 0.03 kHz with the resonance frequency of 357.9 kHz while the OLDC can’t track any drifting.
The Pressure Distribution Test System of Doctors’ Hand in Laparoscopic Surgery
Authors: Wang Shu Yi , Bi Dong Dong , Zheng Jia Kuan , Wang Bing Cao
Published: March 2013

A surface pressure distribution test system of a doctor’s hand during a laparoscopic surgery based on LabVIEW was designed. The principle was that real time acquisition of data signal on multi-channel sensors, and using data acquisition card to get the feed back voltage signal from these pressure sensors, and then transferred to a PC. The test system had realized the real time processing and display of the signal on LabVIEW. The pressure detection range was 0-210g. The system could detect the surface pressure real time of the part of a doctor’s hand which contacting the surface of handle during the laparoscopic surgical procedure. This system could also make quantitative evaluation of the contact pressure on the handle of the laparoscopic instruments and provide a reference to ergonomics design of the handle.
The Study on Test Technologies of C3I Network Equipments
Authors: Cao Wen Bin , Chen Guo Shun , Niu Gang
Published: March 2013

C3I network equipments, with complex architecture, deal with quantities of information from the aspect of time and space, which makes them difficult to support. This paper adopts automatic test and diagnosis techniques, analog networking technique and active test method to satisfy the requirements of timeliness, intelligence and high precision in fault location. A virtual network environment is built to complete the network equipments’ test. It is significant to the complex network equipments’ test and diagnosis.
Weighted Data Fusion Algorithm in the Application of Visual Measurement Network System
Authors: Zhou Jing , Huang Dong Yan , Li Shi Jun , Chen Xiao Lin , Zhang Ye Chi
Published: March 2013

For the problem on the deviation of actual measurement values between different network positions of visual measurement network system , so present the weighted data fusion algorithm . To distribute the weight coefficients according to the stability of eigenvector and fuse the coordinates , finally get the ultimate expression of fusion estimate. The experiment results present the maximum absolute tolerance of the fusion results is 0.039mm via the weighted data fusion algorithm, the maximum one via traditional data fusion algorithm of the center of point set is 0.056mm , Repeatedly measure 50 times , compared with the traditional algorithm, proposed weighted data fusion algorithm has much better precision and better stability.
Electrical Measurement Automated Calibration System Applied Research
Authors: Wang San Qiang , Hou Xing Zhe , Zhou Quan , Chen Wen Li , Zhuang Qiu Hui
Published: March 2013

In recent years, with the rapid development of electric power, the construction of a large number of substation, electrical measuring instrument and device is also increasing, accordingly, testing and calibration work is growing. The traditional calibration method has been unable to meet the actual needs of work. Combining with the practical work, and put forward a new automatic calibrating method, this paper introduces the electrical measuring instrument verification device of automatic calibration system of the working principle and system structure, and illustrates the system application.
Multifunction Simulator for Radar Test
Authors: Hu Ju Rong , Chen Long , Zhou Jing
Published: March 2013

Abstract. This paper describes the design of a general purpose multifunction simulator which is used to test radar and its components. The simulator is a hardware system controlled by computer software which generates echoes of targets, clutter and jamming for radar electromagnetic environment scenario simulation. It will responds to the subject radar’s antenna scan by producing composite echoes in real time. Computer programs are used to management the simulation process and allow various combinations of electromagnetic environment. Parallel signal generator is exploited to increase the execution speed and achieve real-time performance. Since the simulator can produce video frequency and intermediate frequency echo separately it can be used for the test of most components of radar. The capability to accommodate dynamic scenarios of long duration in real time for detailed tracking studies distinguishes the simulator from other pulse-by-pulse simulators that have been previously reported.
Research on the Wireless Monitoring System for Port Crane Structure Stress
Authors: Xu Ming , Ni Jing , Chen Guo Jin
Published: March 2013

Aiming at the limitations of Port Crane structure stress monitoring methods, the structure stress monitoring system based on wireless signal transmission is proposed. The port crane structure stress of the key points were collected by resistance strain gauges. And the stress signal was processed by the monitoring MCU and then delivered to the monitoring center through wireless transmission. Firstly, the principle of the port crane structure stress monitoring system is proposed. And the implementation of hardware and software are discussed in detail. The proposed wireless monitoring system of port crane structure stress with a high accuracy and automation has a good practical value.
The Development and Study of Hoist Hydraulic Braking Safety Online Monitoring System
Authors: Zeng Qing Liang , Zhao Wen Ming , Cui Jing , Wang Yuan Jun
Published: March 2013

Aiming at the technological characteristics and production status of the mine hoist hydraulic brake safety protection system, the overall monitoring framework and monitoring scheme of the hoist brake system is proposed from the perspective of comprehensive protection and control: the high-performance data acquisition card and virtual instrument platform (Labview) are selected to carry out program development work on the system. System displays the monitoring data online and alarms some physical quantities, as well as stores and retrieves some important parameters and operational failures in order to achieve online monitoring security of braking system. So it provides technical support for the repair and maintenance of the mine hoist and scientific protection of the safety running of the hoist.
The Study and Design of a UDP Flow Measurement System
Authors: Guo Hai Feng
Published: March 2013

Proposed a way to UPD flow and UPD system ideology. The system is considered the one-way characteristics of UDP flow in the backbone of the network, used the WinPcap packet capture technology. The system including network packet captures module, packet replay module, packets spell flow module, UDP analysis module, while using the map template classes in stl, improved the performance of UDP packets through a comparison function with efficient custom;Contrast to the data characteristics under the complex network environment, the system adopts the step-by-step small tools design way to facilitate the system to expand new analysis function. Through the three sets of data : a backbone data sets and two DARPA1999 data sets, it can be seen that the overall development of UDP data flow is expanding the network bandwidth , and small UDP flows is more.The quicker network bandwidth development, the shorter the UDP flows average time.
Modified Study of Routing Algorithm Based on ACO for Intensive Aquaculture WSN
Authors: Hua Xu Feng , Tian Yun Chen , Chen Cheng Xun , Xing Ke Zhi
Published: March 2013

Intensive Aquaculture Wireless Sensor Network (WSN) for water quality monitoring has specific requirements such as limited energy availability, low memory. Ant Colony Optimization (ACO) routing algorithm can maximize the lifetime of the network. A modified routing algorithm for Intensive Aquaculture WSN based on the ACO meta-heuristic is presented in this paper. Functions of basic ACO-based algorithm are modified to update the pheromone trail. The performance of Intensive Aquaculture WSN is improved on reducing memory used in monitor nodes and energy spent with communications. The modified routing algorithm was simulated for Intensive Aquaculture WSN scenarios and the results show that it maximizes energy savings.
Health Care Monitoring System Based on WBASN
Authors: Geng Dao Qu , Fang Zhen
Published: March 2013

In recent years, wireless body area sensor network (WBASN) has gained a lot of attention from researchers for its potential application in medical care and health care fields. However, previous studies are typically involved in performance of WBASN, and most research has barely considered the details of system design. This paper presents a health care monitoring system. The design of the system is detailedly described. The evaluation result shows that the system can be easily deployed and suitable for health care monitoring.
Electronic Type Electric Energy Meter Calibrating Method Application Research
Authors: Wang San Qiang , Hou Xing Zhe , Liu Yan Lin , Zhuang Qiu Hui
Published: March 2013

With the progress of science and technology, electronic type electric energy meter is widely used in electric energy metering and charging in China, especially in rural power network reform, investment, electronic type electric energy meter with its linearity, stability is good, the power consumption of small, voltage and frequency response speed, high measurement precision, to further improve the market share, but how to test electronic type electric energy meter, but has been puzzling the test technical staff, according to the practical experience on the above problem undertakes a few discuss. This paper analyzes the electronic type electric energy meter principle, characteristics, focus on the research of the electric energy meter calibration method, the electronic type electric energy meter calibrating idea and train of thought.
Flow Control Research between ForCES Channels
Authors: Song Huan Huan , Bin Zhu Ge , Yu Cheng , Wang Wei Ming
Published: March 2013

In order to enhance the performance of ForCES network fully, and ensure the security and accuracy of communication between Control Elements (CEs) and Forwarding Elements (FEs), we designed Prediction-based Traffic Control and Configuration (PTCC) to reduce the likelihood, severity and duration of congestion. Through predicting the average reaching rate of the news package in the following time to control well the flow of every ForCES channel, and distribute available bandwidth for every ForCES channel according to news throughput reasonably and instantaneously. The experimental results validated the validity of this flow control mechanism.
Study on Control Algorithm of Wind-Solar Hybrid Generation System
Authors: Zhang Li Xia , Zhang Xiu Xia , Liu Ting , Wang Er Lei , Yang Xiao Cong , Wen Jun Xia , Lou Xiu Li , Zhang Shao Hui
Published: March 2013

An improved maximum power point tracking method for wind-solar hybrid generation system was proposed in this paper. The maximum power point was tracked by Perturbation and Observation Algorithms and quadratic interpolation method. Taking the advantage of the above methods, the new method could avoid shock phenomenon of Perturbation and Observation Algorithms near the maximum power point, reduce miscarriage of justice. The whole system was simulated on MATLAB. The simulation results shown that, the improved control method could search the maximum power point of wind-solar hybrid generation system quickly, and work stably.
Effects of the Structure Size of Micro Bow-Shaped Transducer on Large Strain Measuring
Authors: Yue Xiao Liang , Feng Feng , Chen Jun
Published: March 2013

The hyperelastic-viscoelastic model was applied on HTPB propellant to simulate the large strain problem during tensile test. The feasibility of using micro bow-shaped transducer to measure the large strain of HTPB propellant was discussed. The ABAQUS package was used to simulate the HTPB propellant tensile test with different sizes of micro bow-shaped transducer. The effect of micro bow-shaped transducer size on large strain measuring was concluded, and the foundation of determining bow-shaped transducer size was given. The strain transfer relational expression for a given size was obtained. It will be reference for solving the large strain measuring of HTPB propellant in complex working condition.
Design Research of Car Engine Hood of Robot Rimming Fixture
Authors: Gao Jin Gang , Zhang Shuang , Wang Hua , You Xin
Published: March 2013

Connection of internal and external board of automobile body‘s door cover is usually stamped by traditional mold and pressing machine, Because outer edge outline should be changed according to the change of car body outline and edge angles along the outline are also different, it’s very difficult to edge the area with sharp edge transition and too big edge angle. Robot edge fixture, the new design technology of internal and external board connection, is composed of seven parts, including edge mold, platform, lifting mechanism, testing institution, clamping unit, logic gas and electric control system, which overcomes shortcomings of traditional stamping edge mold, such as covering much area, costing high and having poor flexibility, shortens development cycle and of automobile and enhances the competitiveness of products.
Magic Cube Approach for Crashworthiness Design with Lightweight Considerations
Authors: Zhang Jun , Qi Chang , Yang Shu , Du Yu , Hu Ping
Published: March 2013

This paper presents the basic theories and methodologies of the Magic Cube (MQ) approach, an advanced design approach which provides a systematic way to examine general crashworthiness and blast protection designs in terms of both structural and material aspects. The MQ approach is developed to assist the design process for improved structural crashworthiness: by applying time (process) decomposition, the original difficult nonlinear dynamic crashworthiness design problem is converted into a sequence of simplified linear design problems; by applying multi-domain topology optimization technique to the simplified linear design problems, the optimal configuration of the designed structure is obtained. A design of reinforced thin-walled rail under oblique impact is used to demonstrate the MQ approach. Numerical simulation results show that, compared with the original rail of the same weight, the MQ approach leads to a design with significantly higher energy absorption performance and lower initial crushing force under oblique impact.
Automatic Sort Order of Checkerboard Corners Based on Convex Hull Algorithm
Authors: Duan Xiu Sheng , Zhu Yao Xuan , Xiao Jing , Su Jian Dong
Published: March 2013

As a familiar mark in applications of computer vision, checkerboard can be used in camera calibration and pose measurement of dimensional object. When the checkerboard corners have been detected, for further calibration and measurement, the next necessary step is to rank these corners. This paper presents an automatic sort order of checkerboard corners based on convex hull Algorithm. As a result, the image dots of corners can be automatically matched with its corresponding physical dots without any artificial manipulation. Experimental results show the method is maneuverable and efficient with high stability.
Effect of Surface Radiation on Conjugate Natural Convection in a Square Enclosure with a Tube at Different Locations
Authors: Wang Jian Sheng , Xu Yong
Published: March 2013

The conjugate natural convection heat transfer with and without the interaction of the surface radiation in a square enclosure was carried out by numerical simulation. The vertical walls of the square enclosure were heated with different temperatures, and the others were adiabatic. A circular tube was inserted into the square enclosure. It was observed that varied location of the tube center can lead to different motion and heat transfer intensities. In addition, surface radiation reduces the convective heat transfer in the square enclosure compared to the pure natural convection case and enhances the overall heat transfer performance.
Design of Self-Compensated High Accuracy Fuel Level Sensor
Authors: Yuan Mei , Xiong Si Si , Dong Shao Peng
Published: March 2013

A brand new self-compensated capacitive fuel level sensor has been proposed in this paper. Through mathematics manipulation and theoretical analysis, we design the self-compensated structure of capacitive level sensor. The multiple segmentation structure makes compensation for temperature and medium possible. Furthermore, the effect caused by adhesion on the sensor electrodes if the adhesion fails to return initial position when the plane’s attitude is changing has been analyzed. Additionally, based on RF admittance theory, the transducer which can eliminate the adhesion effect has been designed and implemented using phase-locked sampling technique. Through level experiment and data analysis, the fuel level sensor proved to achieve all the destinations, including compensation for temperature and medium and elimination of adhesion effect. Hence, the accuracy of level measurement has been improved.
Calculate Transient Availability of Complex Repairable System Base on Coherent System
Authors: Yin Ming Ang , Sun Zhi Li , Qiang Yang , Xu Lu
Published: March 2013

Repairable system is complex, because of its diversity distribution form of units’ lives and its complex structure. In this paper we studied on a complex system. Lives and repairing time of units obey general distributions, we got the unit transient availability by using Markov renewal process, then got the system transient availability by using the character of coherent system. Finally gave example which verified by Monte Carlo method. This paper provided calculation base for more complex system.
Evaluation of CMM Accuracy by Using Capability Indexes
Authors: Yahya Adel Elhadi M. , Halaj Martin
Published: March 2013

Capability indexes of several types belong to the most common tools used for evaluation of the measuring instruments performance over a certain period of time. The indices differ by calculation method, properties as well as by intended use. But their design principle is approximately the same. The ratio of prescribed (required) accuracy and really achieved process accuracy is always observed. However, this evaluation represents only a part of the overall measurements management system. The suitability of capability indexes for the evaluation of CMMs accuracy over a time. After analyzing the results we had found machine capability indexes good method for evaluation of Coordinate Measuring Machines (CMM) accuracy over a certain time interval. CMM are high accuracy and capable to perform the measurement of lengths, machine capability indexes helps to determine the ability for coordinate measuring machine between tolerance limits and engineering specifications, but the use of x-control charts to get and keep processes under control.
The Application of SG3525 Pulse Width Modulator in Intermediate Frequency Induction Heating Power Supply
Authors: Zong Xiao Ping , Ma Teng Yue , Lei Yao Xu
Published: March 2013

In This paper, we introduce a kind of intermediate frequency induction heating power supply integral design based on the pulse width modulator SG3525, analyse SG3525, KA962F driving chip, the main circuit structure and function and realize frequency and occupies emptiescompared independent can be adjusted. The main circuit adopts the series resonant type IGBT half bridge inverter circuit. It outputs pulse with difference of two phases of 180 degrees to the IGBT driver board through the SG3525, IGBT driver board receives the pulse and drive the IGBT main circuit. Circuit adds the limit frequency protection circuit design, so that the heating power supply works in the inductive state. To improve the on-site operation safety.Finally the unit circuit experiment is conducted on the basis of the field experiment, it is proved that the whole design scheme is feasibility by experiments.
Simulation and Performance Evaluation of Finned Tube Gas Cooler for Trans-Critical CO2 Refrigeration System
Authors: Gupta Dileep Kumar , Dasgupta Mani Shankar
Published: March 2013

Carbon dioxide is one of the rediscovered sustainable options, as CFCs and HFCs are now in the list of regulated substances, to be phased out in time bound way. There are however various challenges to the successful use of CO2 as refrigerant. Cost effective and widely acceptable technology is demand of the time. Performance of trans-critical CO2 refrigeration systems is found to be sensitive to the gas cooler design. In the present work a detailed mathematical model is developed for a finned tube air cooled gas cooler and the same is validated using published literature. Subsequently, to achieve the lowest possible approach temperature, the performance of the gas cooler is analyzed for various air velocity and alternate pipe arrangements. The effect of increase in size of gas cooler to its performance is also studied.