bluuebunny/crossref_metadata_2025 huggingface dataset:
A Real-Time Vehicle Exhaust Gas Monitoring Enabled Optimization Approach for Air Pollution Control
Authors: Wang Li Xing , Hu Ling Jie , Ma Rui Cong
Published: August 2014

This research described in the paper proposed a device combining wireless sensor technique, GPS and wireless charge technique. This device can be installed nearby the vehicle tailpipe and transmit measurement data of exhaust gas to the backend system in real-time. It facilitates knowledge of exhaust gas the vehicle generated on the route it passed. With this information, a reference system is developed to estimate gas pollution that will be generated by the vehicle on each route. An artificial intelligent method, case-based reasoning is applied in the system design. Meanwhile, a new mathematical model can be built with additional consideration for gas pollution in route planning and optimization of vehicles. Some optimization approaches, including genetic algorithm, and some other combination algorithm can be applied to get solution of this model with new additional constraints.
Soil Erosion Monitoring System of Large Areas Based on Dynamic Priority GPRS Remote Network
Authors: Shan Jin Bao , Jiang Wei Wei , Mu Shi Le
Published: August 2014

Soil and water loss monitoring is an important part of work for soil and water conservation, the monitoring and assessment of soil and water loss in large area is related to many security field. The remote GPRS network control system is used for large area soil and water loss monitoring in this paper, monitoring system is designed and implemented for soil and water loss based on dynamic priority mountains of GPRS remote network. The hardware and software of the system is realized, in the design of software, the particle swarm optimization algorithms is used to analyze some information distortion, the calculation of the loss is optimized and it is more accurate. Soil and water loss in Nanjing area with a wide range of incentives in the mountain is taken for test, the system can give the mountain soil erosion data monitoring in real-time, the monitoring area is more than 10 square kilometers with signals not break, and the accuracy is better.
A Method of Intrusion Detection in Large-Scale Digital Media Communication Network
Authors: Cao Yan Zhen
Published: August 2014

With the development of network, an increasing amount of broadcast television information transforms from simulation into digit, which therefor make the security of media information an imminent issue to be concerned. In this paper, a new kind of intrusion detection model was designed for the media information security system. In the system, both the false alarm rate and missing report rate decreased by using support vector machine classification technique in this new model. As a result of the experimental results, our algorithm processed a high classification accuracy and efficiency.
Large Tanning Machine Fault Detection Algorithm Research
Authors: Li Yi
Published: August 2014

In fault detection process of large tanning machine, fault signal fluctuations are susceptibly caused by interference of external environment. The traditional methods are difficult to accurately classify fault detection of such random fluctuations, resulting in latter detection with low accuracy. To avoid these shortcomings, support vector algorithm based on least squares is proposed for fault detection of large tanning machine. Experimental results show that the algorithm can improve the accuracy of fault detection.
Optimal Design of a Leveling System of the Piston Seal
Authors: Li Feng , Fang Na , Xie Rong Yue , Tu Shan Chao
Published: August 2014

As a hydraulic system’s specific vector execution unit runs, leveling cylinder is to ensure the entire system is an important component of the horizontal plane. The fuel tank is on the basis of traditional reciprocating action adds an assist in the return spring. This paper analyzes the leveling system is mainly due to poor seal leaks caused by a few, and on this basis gives a solution, in order to improve the technical level of equipment operators and maintenance personnel to improve the use and maintenance of equipment support capabilities.
Research and Design of Measurement Meter for the Network Traffic
Authors: Zhou Hong
Published: August 2014

Now, the measure of network communications mainly adopts the measure of software focus which is based on the servers of telecom dealer. With the rapid increase of cutwork telecom users, the style we mentioned above ties up more and more hardware resource and network bandwidth, to telecom customers, this style measure is low at diaphaneity and hard to ensure the legitimacy rights.
The “Measurement Meter for the Network Traffic” we research in this paper adapts the traffic measure and be used between the user’s port and the telecom network. It also compensated the measure’s weaknesses of unifying background measure by telecom dealer.
Air Conditioning Compressor Front Cover of Squeeze Casting Process Design and Numerical Simulation
Authors: Tang Jin Jun , Hou Li Qun , Fei Liang Jun , Yulei Li , Jin Xiao Yu
Published: August 2014

This paper is mainly on the research of squeeze casting production automobile air conditioner front cover FS170C, due to the development and optimization of the part in the production process, design and manufacture of low cost mould, the rules of structure and properties of castings is lack of corresponding research, seriously affected the development and market competition ability of the air conditioning compressor front cover. In order to solve the above problems, and to provide reference data and process scheme is necessary, this study to optimize the design of squeeze casting technology of the front cover of the air conditioner, finalized a most reasonable extrusion casting scheme, namely the gating system is more suitable and exhaust system design, and the squeeze casting process parameters, in this scheme next, carries on the mold design, production of squeeze casting of high quality.
Spectrophotometric Method for the Assay of Aspirin
Authors: Lei Yan Hong
Published: August 2014

A selective method was developed for the determination of aspirin by Spectrophotometric method .The spectra (range: λ=200~320 nm) were processed. The linear ranges of aspirin was at 50.28 ~ 125.7μg • mL-1 .the aspirin showed good linear correlation.The ultraviolet spectrophotometry data of the samples were also used to evaluate the samples’ quantitative composition.It was shown that recovery of the method by standard addition method was respectively valued 102.06% for aspirin .The method was simple,reliable,accurate,reproducible with high sensitivity and selectivity.
The Study on Continuous Braking of Heavy Vehicle
Authors: Wang Peng , Wei Lang , Yuan Wang Fang
Published: August 2014

By analyzing the inadaptability of vehicle braking system on the long-distance downgrade in the mountainous highway, the paper puts forward the necessity of continuous braking device and pointes out the advantages and disadvantages several continuous braking devices as well as the influencing factors of continuous braking performance, it is concluded that the combination of many continuous brake devices gains access to better continuous braking efficiency.
Design of Automatic Output of Carbon Electrode Processing System Testing Tag Based on WinCC
Authors: Sun Bei , Bai Yan , Zhang Zhi Yi
Published: August 2014

For a long time, the parameters of carbon electrode product are obtained by manual testing record which filled in the labels. This paper introduces the function of Global Script and User Archive in WinCC, which achieves printing labels automatically on the test data obtained from the processing of carbon electrode’s automatic process system. Avoid some mistakes caused by manual detection, the data storage and data query in WinCC are very convenient.
Research of the Intelligent Medical Infusion Monitoring System
Authors: Wang Hua Sheng , Bai Yan
Published: August 2014

This project is a multi-platform operating system consisting of a upper monitor and some lower position machines. It mainly studies on the detection and control in the process of infusion treatment. Through the infrared detection of the waveform on pulse, using the pulse counting mode, we can measure the number of drops of liquid. We also use a drive motor to control the transfusion drip rate, thus the infusion tube can be closed when necessary and give an alarm. Such a system makes the nursing staff more convenient to operate and can reduce labor intensity and medical accidents.
Comparative Research on Energy-Saving Performance of New Energy Vehicles
Authors: Wang Xi Yuan , Liu Yuan
Published: August 2014

The paper introduces the meaning of “energy-saving and emission reduction” in new energy vehicles, analyzes the basic forms of new energy vehicles, proposes two-step method for calculating energy-saving performance, and establishes energy consumption calculation formulas through comparative analysis on overall energy consumption and emission during the whole life between several types of pure electric vehicles and conventional vehicles. The paper provides theoretical support for rational development of energy-saving new energy automotive industry.
Design and Implementation of Automation Testing Framework Based on Keyword Driven
Authors: He Zhong Hai , Zhang Xiang , Zhu Xiang Yin
Published: August 2014

For the purpose of settling problems in the present automated testing frameworks, the paper presents an automated testing framework based on keyword driven technology. At first, it summarized and analyzed the recent automated testing frameworks; and then it proposed the framework’s system architecture, and also presented the key technology details of the framework. At last, this paper compared this paper’s framework with the recent frameworks by the IP phone, which proved that this framework had superiority in reducing the scale of test scripts, raising the overall efficiency of testing and so on.
Measurement of Software Structural Properties Based on the Theory of Complex Networks
Authors: Zhao Xiao Lin , Chen Xiang Ling Yi , Hu Chang Zhen , Wang Yong , Li Qing Jun
Published: August 2014

In this paper, we combine the complex network theory and the traditional software structure metrology to propose a new model for the study of the structural characteristics of the software---- Multi-dimensional measurement model of the software structure properties. The multi-dimensional measurement model of the software structure properties is divided into three parts. Each part has their own properties. In this model, the system is abstracted into a network model in the first step. Then we design the metric parameters considering both the complex network theory and the Object-Oriented software research and also give the definition and calculation method of these metric parameters. And on this basis we use the advantages of eclipse and complex network simulation tool pajek to calculate the metrics parameters designed before. Then give explanation to the experimental results which can demonstrate the reliability of the new model, which has also made a solid foundation for the following study of the software structure properties.
A Sudden Topic Detection Method for Chinese Micro-Blog
Authors: Liao Chuan Zhu , Wang Wei , Jiang Ming Yan
Published: August 2014

With the characteristics of timeliness, rapid spread and easy access, micro-blog has made it possible to timely unearth emergencies and dynamically track the latest development. Considering frequency and timeliness of the words as well as the influence of resources, this paper proposes a sudden topic detection method, especially for micro-blog, and establishes a context-based weight evaluation model. Compared with semantic similarity model, this context-based model is especially more adaptable to micro-blog. Real experiment data from micro-blog proves that the proposed methods could detect sudden incidents effectively with big data processing capacity and low time complexity.
Design of Transient Electromagnetic Signal Acquisition System Based on FPGA
Authors: Peng Bo , Sun Guang Min , Zhao De Qun
Published: August 2014

An acquisition system applying in transient electromagnetic method (TEM) receiver has been designed in this paper. The accuracy of acquisition has been improved by using a floating-point A/D with high input dynamic range, which is composed of programmable gain amplifiers (PGA) and a dual-channel 16 bit resolution ADC. The real-time performance can be ensured by using a field-programmable gate arrays (FPGA) as the main control unit to control ADC, PGA, data storage and communication interface. By integrating a soft core CPU, Nios II, in FPGA, the complexity of circuit design was decreased, and the work efficiency of system was improved. This system, which has good performance of real-time and high integration level, can meet the needs of TEM signal acquisition.
Development of Mine Water Source Identification System Based on MapObjects
Authors: Liu De Min , Zhang Liang Jing , Zhao Lian Tao , Yue Zun Cai
Published: August 2014

In order to realize the mine water source identification and to prevent water accidents, taking Xinglong Zhuang coal mine’s lower group coal mining as an example, based on the analysis of mine hydrogeological conditions, the mine water source identification system was designed by using the software of MapObjects powerful spatial analysis ability and Bayesian classification analytical method. The software can achieve mine water source identification and provide a certain basis for mine water disaster prevention and control.
Development of Cable Inspection System Based on Image Processing
Authors: Liu Huan , Liu Chao Tao
Published: August 2014

A stayed cable inspection system was developed which consists of robot, host computer, cameras and image acquisition system. The robot was driven with single motor and could climb cables of various and variable diameters. Pictures of the cables’ were taken by the robot, and the defects and mars were identified automatically with image recognition. The steps of image recognition includes image de-noising, image enhancement, image segmentation, feature extraction, and recognition with the features of the images’ histogram grayscale distributions and energy distributions.
Application of the Empirical Mode Decomposition Time-Frequency Analysis Method Based on Pipeline Leak Detection
Authors: Tian Jing
Published: August 2014

In pipeline leak detection, collected fault signal will inevitably influenced by all kinds of industrial noise, sometimes even the useful signals submerged by the noise, so it causes a huge problem for leak location. Regarding this problem, the Empirical Mode Decomposition was used to analyze the signal instead of the traditional method of Time-Frequency analysis method. Compared with the traditional method, this method can not only get tid of noise, but also analyze the fault signal more accurately, which would help to improve the accuracy of the pipeline leak detection further.
Real-Time Physical Activity Recognition Using a Single Triaxial Accelerometer Based on HMM
Authors: Cai Jun , Yang Ke Quan , Zhang Yi
Published: August 2014

This study focuses on physical activity recognition of elder people using a single triaxial accelerometer attached on waist. With accelerations data acquired continuously by a wearable wireless device, a motion pattern recognition method based on acceleration time series analysis of human activity states is proposed. We use Hidden Markov Model (HMM) to identify physical activity series. Experimental result shows that the activity recognition rate is 95.7% using this method, which can play an important role in the adjuvant therapy.
A Survey of Sensor Technologies for Prognostics and Health Management of Electronic Systems
Authors: Yang Wen Xue , Chen Zhe , Yang Feng
Published: August 2014

Recently, the field of Prognostics and Health Management (PHM) for electronic products and systems has received increasing attention due to the potentialities to provide early warning of system failures, reduce life cycle costs, and forecast maintenance as needed. This paper introduces the sensors and their sensor technologies. The required attributes of sensors for the development for PHM of electronics are discussed. Finally, their trends in sensor systems are presented.
A New Technique to Reconstruct CAP Using Dual-Channel Peripheral Pressure Singal Based on Blind Identification
Authors: Yang Xiao Ping , Ma Chao , Wu Xue Cong
Published: August 2014

Central aortic pressure (CAP) is pathophysiologically more relevant than peripheral pressures for the evaluation of cardiovascular disease. However, the invasive measurement of CAP is restricted in the clinical. In this study, we proposed a new technique to reconstruct CAP using dual-channel peripheral pressure signal based on blind identification. First, we establish a single input multi-output (SIMO) physics-based model, the common model input then can be estimated directly using input subspace (LS) method. In order to demonstrate the feasibility of this technique, we use two interventional surgery patients conducting human trials, in which non-invasive radial and finger blood pressure (BP) waveform as well as reference invasive CAP are recorded simultaneously. The estimated CAP is very closer in morphology to its measured (selected 30s segments, the root mean square errors is 2.02mmHg). In conclusion, noting that dual-peripheral pressure measurements are all non-invasive, it is conducive to the clinical promotion and application.
Research on Measurement of Ball Screw Helical Line Error Based on Electronic Generative Metrology
Authors: Li Hai Tao , Guo Jun Jie , Du Hong Feng , Wang Xing
Published: August 2014

Aiming at the disadvantages of current error measuring instruments of ball screw helix, a new screw helical line error measuring device is developed, moreover, a new method called electronic generative metrology (EGM) is introduced. The problem of measuring head deformation has been settled down because of installation of two driving motors on the instrument, so it is easy to achieve dynamic high precision measurement. Taking the long grating and circular grating as length and angle measurement datum respectively, the torque motor and linear motor are able to form position close-loop control. The measuring head frame is installed on air flotation slider which has characters of high kinematic accuracy and stability, so it guarantees high measurement accuracy. Then, the measurement accuracy analysis of the device is given. And the last, the EGM is developed by using this new research tool. Related experimental studies are conducted to verify the feasibility of the new method.
Design of Automatic Contour Detection System of Open Arc Welding Workpiece
Authors: Hou Ming , Zhou Hui Xing
Published: August 2014

This paper designs an automatic contour detection system of open arc welding workpiece. The realization of the device is the first step to achieve automatic control system of welding processes. Firstly it summarizes the difficulties must be solved in the design of detection system. According to the requirements, an electromechanical system is designed. The performance has been analyzed by simulation .An experiment has been done to verify the prototype. The results show the design meets the requirements.
Handwritten Digit Recognition Based on Modified LLE Algorithm
Authors: Gu Bo Yu , Li Ye Chun
Published: August 2014

Locally linear embedding is an efficient manifold learning approach. A modified locally linear embedding algorithm is proposed to cope with the interferences of affine transformations in handwritten digit recognition. In order to offset all kinds of affine transformations, the Euclidean distance is replaced by the tangent distance which is more appropriate for handwritten digit recognition based on image. And the number of neighborhood is computed automatically based on the similarity of images. Experimental results show that the accuracy rate of is improved.
Study on Multipath Effect under the Environment of PCM/FM Telemetry Soft Demodulation
Authors: Fu Gang , Wu Yan Jun , Li Ren Long , Wang Li Ping
Published: August 2014

Because the reentry telemetry wireless channel multipath propagation effects and the effect, channel will introduce transmission time delay dispersion, caused between the PCM/FM telemetry signal crosstalk and signal to noise ratio is too low, significantly increase BER. While traditional demodulation method because the demodulator threshold higher no longer apply. Study the problem, a multiple Symbol Detection method based on sliding strategy (Multi - Symbol Detection, MSD), can effectively overcome the low SNR and inter symbol interference. The simulation and test results verify the effectiveness of the method.
A Design and Implementation of Water Surveillance System Based on Wireless Sensor Networks
Authors: Zhu Shan Hong , Tang Pei
Published: August 2014

A water environmental monitoring system based on a wireless sensor network is proposed. It consists of three parts: data monitoring nodes, data base station and remote monitoring center. This system is suitable for the complex and large-scale water environment monitoring, such as for reservoirs, lakes, rivers, swamps, and shallow or deep ground waters. This paper is devoted to the explanation and illustration for our new water environment monitoring system design. The system had successfully accomplished the online auto-monitoring of the water temperature and pH value environment of an artificial lake. The monitoring system thus promises broad applicability prospects. The system's measurement capacity ranges from 0 to 90 °C for water temperature, with an accuracy of ±0.5 °C; from 0 to 16 on pH value, with an accuracy of ±0.05 pH units. Sensors applicable to different water quality scenarios should be installed at the nodes to meet the monitoring demands for a variety of water environments and to obtain different parameters.
An Improved Algorithm of RS Codes Blind Recognition
Authors: Li Tong , Miao Cheng Lin , Lv Jun
Published: August 2014

The acquisition of information about channel coding sequences is the research emphasis and difficulties at present, and recognizing the channel coding parameters is the prerequisite for information acquisition. RS Codes are a class of linear block codes as well as a special class of BCH Codes and cyclic codes. It regards a group of symbols with a length of n as a unit to process with, and the n symbols are generated by k transmitting information symbols under some proper associated rules. RS Codes are widely used in various communication systems. In this paper, an algorithm of RS Codes blind recognition is researched. And a blind recognition model is established on MATLAB. At last, the paper presents the recognition rates of situations with different error rates.
The Mechanical Fault Diagnosis Method Based on EMD and Time Series Analysis
Authors: Ma Jun , Zhang Shi Hai
Published: August 2014

It is the precondition of vibration fault diagnosis technology that appropriate signal analysis method is applied to separate mechanical fault character message from vibration monitoring signal. Based on the characteristics of multi-exciting, multi-model, non-stationary, nonlinear of the complex mechanical vibration signal, the EMD (Empirical Mode Decomposition) method is firstly applied to decompose the most refined IMF (Intrinsic Mode Function) components of vibration monitoring signal, and then the time series analysis method is applied to estimate power spectrums of IMF components and separate the fault character messages. The feasibility and advantage of the associated method are proved by analyzing the diesel engine crankshaft vibration monitoring signal in the paper.
Comprehensive Monitoring System of Fresh Food Cold Chain Logistics
Authors: Zhang Yong Jun , Chen En Xiu
Published: August 2014

The paper discusses how to use the advanced technology of the Internet of things to realize the real-time monitoring of the library and the preservation of goods in transit third party cold chain logistics, mainly discusses how to network technology with Internet 3G network of RFID and WSN integrated network and intelligent nodes, realize the visualization of fresh goods real-time monitoring, convenient management personnel of customer inquiries and feedback information, to ensure the preservation of food quality and safety.
Research on Vehicle Classification Recognition Based on RCS
Authors: Wang Jian Hua , Jiang Lin Yan , Wang Yun Cheng
Published: August 2014

In order to enhance the effectiveness of the vehicle active anti-collision warning system, this article discussed a new classification method of radar target based on the radar cross section (RCS). This article first modeled nine types of representative vehicles. And then, using the Large Element PO (Physical Optics) method, this article calculated these vehicles’ RCS with the electromagnetic calculation software. Furthermore, this article classified these nine kinds of vehicles into four types according to vehicles’ RCS. The new classification method may be beneficial to the application of the vehicle active anti-collision warning system.
Potential of Photoionization Detector for Organic Compounds Analysis at a Brownfield Site Investigation
Authors: Zhang Chi , Zhong Zhong , Sun Ying Jun , Feng Yi Jian , Sun Lu
Published: August 2014

Photoionization detector (PID) provided an efficient and inexpensive approach for many gas and vapor analytes. Using PID as a real-time diagnostic tool in contaminated site investigation has been addressed in this study in comparison with post-time GC-MS detection. Total pollutant concentrations from selected field soil samples were calculated by addition of each VOCs and SVOCs contaminant concentration detected via an Agilent 6890 GC-MS, while portable photoionization detector (PPID) values were recorded in real-time during site investigation. Contamination distributions were plotted based on PPID readings and GC-MS data respectively. The results showed a positive correlation between PPID readings and contaminants concentrations, suggesting that PPID reading could be used as a qualitative tool to characterize the approximate range of pollutants. The accuracy of PPID reading for VOCs and SVOCs detection at contaminated site investigation could be optimized by calibration and specialized measurement protocols.
RBF Neural Network Model Training by Unscented Kalman Filter and its Application in Mechanical Fault Diagnosis
Authors: Gan Xu Sheng , Li Hua Ping , Gao Hai Long
Published: August 2014

To improve the ability of fault diagnosis for mechanical equipment, a Radial Basis Function Neural Network (RBFNN) diagnosis method based on Unscented Kalman Filter (UKF) algorithm is proposed. In the algorithm, at first, UKF algorithm is used to estimate the parameters of RBFNN, and then the proposed method is introduced into the fault diagnosis of mechanical equipment. The simulation indicates that the established model has a good diagnosis performance for mechanical fault diagnosis.
A Near-Infrared Starry Image Stars Identifying Method Based on Star Magnitude Differ and Star Point Pairs
Authors: Wang Zhe , Guo Shao Jun
Published: August 2014

The star identification is a key technology of Near infrared starry-sky image navigation. We can calculate the position of the imaging platform after the identification of at least three stars.In this paper, we designed a method of star matching and identifying based on the two characteristics of magnitude differ and star point pairs. It can bring high accurate of the identification.
An Improved ZA-LMS Algorithm for Sparse System Identification with Variable Sparsity
Authors: Luo Hui , Lin Yun , Xia Qing
Published: August 2014

The standard least mean square algorithm does not consider the sparsity of the impulse response,and the performs of the ZA-LMS algorithm deteriorates ,as the degree of system sparsity reduces or non-sparse . Concerning this issue ,the ZA-LMS algorithm is studied and modified in this paper to improve the performance of sparse system identification .The improved algorithm by modify the zero attraction term, which attracts the coefficients only in a certain range (the “inactive” taps), thus have a good performance when the sparsity decreases. The simulations demonstrate that the proposed algorithm significantly outperforms then the ZA-LMS with variable sparisity.
Relationship Modeling for the Psychological Impact of Night Vision on Braking Distance
Authors: Liu Chun Sheng
Published: August 2014

The traditional braking model does not consider the impact of drivers' visual distance error, which leads to deviation in determining the distance between vehicles, and therefore effective braking model cannot be built. In order to solve this problem, the paper proposes a modeling method reflecting the relationship between psychology of night vision and braking distance to get the optimal braking reaction speed thus realizing intelligent emergency brake control. The experimental results show that the model takes the relationship between psychology of night vision and braking distance into consideration, increases the braking reaction speed of the drivers, and has high robustness.
Research on Substation Equipment Temperature Monitoring Technology
Authors: Yu Zheng Zhi , Li Zhi Gang , Fan Xi Ming , Du Yu , Li Mingxing , Yang Shi
Published: August 2014

with the substation construction and retrofit, gradually achieve the unattended substation operation, long-term high temperature operation is the main cause of equipment wear and tear, fault, in view of the continuously monitor equipment operation temperature, helps to discover the hidden trouble of equipment operation, master the equipment running status, improve the operating life of equipment. Temperature measuring technology as the main technical means, through continuous improvement to upgrade, there are so many ways to achieve, but the lack of standards and specifications. Through the comparison and analysis of the principle of the existing equipment temperature monitoring technology, concludes the key points of equipment temperature measurement technology, discusses the development trend of substation equipment temperature measurement technology, formation of substation equipment should have the characteristics of temperature monitoring technology. In substation operations management and equipment maintenance as the goal, combined with the Internet of things, the sensing technology, the realization of intelligent substation temperature measuring technology application.
Development of Magnetic Bearing Monitoring System
Authors: Yu Wen Tao , Li Hong Wei , Liu Shu Qin
Published: August 2014

The monitoring system of AMB (Active Magnetic Bearing) can display rotor displacement signals and real-time current signal of electromagnetic coils, monitoring the rotor running status of AMB. This article describes the monitoring system that is based on the AMB original hardware circuit and details of its hardware components and software modules function. Experiments show that: the function of each part of the electromagnetic bearing monitoring system uptime, and has good expansion; this system has been successfully applied in second flexible critical speed rotor magnetic bearing system.
The Feasibility Research for Detecting the Nitrogen Content in Sewage with NIPGA Method
Authors: Jia Fu Quan , Tian Zhu Jun
Published: August 2014

NIPGA technology is used in order to detect the total nitrogen content in sewage quickly. D-D neutron generator is used as the neutron source and BGO detector is used to detect gamma rays of nitrogen. The simulated result of MCNP shows the nitrogen’s limit of detection is 0.2 mg/L and the total nitrogen in V-type water can be detected. So this method can be used to detect the total nitrogen content in sewage quickly.
Oil Tank Monitoring System to Prevent Oil Pollution
Authors: Liu Na
Published: August 2014

With the national safety supervision departments and environmental protection departments having increasingly stringent safety monitoring requirements on large-scale flammable and explosive petroleum and chemical storage tanks, the security automatic monitoring and information management automation systems of the oil depot are increasingly being valued by the people, and it is more urgent to build the digital oil depot security monitoring management system. The new monitoring system can achieve the unified supervision of the oil depot digital business, and can also raise the comprehensive unified management level of fire protection, safety and oil plants, and can also provide remote monitoring services to the higher management level.
Simulation of VFTO by ATP/EMTP with Various Arc Models
Authors: Dai Hang , Liu Xiao Fan , Zhang Wei Dong
Published: August 2014

Several arc models representing a disconnector’s closing operation in a 252kV gas insulated switchgear (GIS) are implemented with a computer program ATP/EMTP to simulate very fast transient overvoltage (VFTO). Arc models are used as black box models in connection with a test circuit. Theoretical bases, formulas and realizations of these models are described. Arc models’ parameters are mainly pinpointed by fitting their simulation results with VFTO waveforms measured in a real 252kV GIS test setup. Comparisons between arc models’ simulation results and measurement indicate that dynamic arc models based on Cassie and Mayr theories give more realistic results with particular regard to VFTO’s peak value and frequency spectrum.
Review on the Supervision Monitoring Program for Radioactive Effluent of Nuclear Power Plants
Authors: Li Jin , Lu Wei Wei , He Liang , Zhang Yan Xia , Yue Hui Guo
Published: August 2014

The supervision monitoring program for radioactive effluent of nuclear power plants is an important basis of the radioactive effluent monitoring work. The general review principle of the supervision monitoring program is discussed in this article, and review suggestions of monitoring, evaluating and quality assurance are also given by focusing on requirements of technical details about key elements such as monitoring projects, sampling and monitoring points, frequencies and low limits of detection. For the supervision monitoring work of radioactive effluent of nuclear power plants, it can provide some guidance about the review of the supervision monitoring program for nuclear safety regulators, and provide some reference about the design and revision of the supervision monitoring program for nuclear safety monitoring departments.
Preliminary Research on Deformable Member for Shape Stealth of Tank
Authors: Xu Wei Dong , Shi Fang Mo , Liu Jun , Ma Yao
Published: August 2014

In the modern battlefield, Radar is one of the most important equipment in the field of information access and precision-guided, battlefield targets face increasing radar threat, the application of radar stealth technology can improve the survivability of the target to some extent. But the development of radar stealth technology with tank for typical ground weapon is slow, especially to the existing ground weapon. This paper analyzes the distribution of radar scattering characteristics of the existing tank, and the deformable member for shape stealth for existing tank is designed, the results prove that the RCS of tank can be preferably reduced with the deformable members.
Multi-Sensor Data Fusion Based on ADS-B and MLAT in Approach
Authors: Lu Yu , Huang Rong Shun , Xu Zi Li
Published: August 2014

ADS-B (Automatic Dependent Surveillance - Broadcast) and MLAT (Multilateration) are the main surveillance techniques for ATC (Air Traffic Control), and will play an important role in the future's tracking system. The fusion between ADS-B and MLAT is able to achieve more accurate tracking. In views of the data characters of these two techniques, this paper designs a concrete fusion framework with multi-levels based on federal Kalman filters to fuse ADS-B and MLAT in approach. Under this framework, both ADS-B and MLAT data are processed intensively to achieve high accuracy. Experimental results based on simulation and practical data illustrate the algorithm can achieve high precision.
The Disfigurement Repairing of Centrifugal Foundry Cast Iron Roller Ring Face
Authors: Yao Jian Hui , Shao Bo , Gao Yun Fang
Published: August 2014

The casting disfigurement on the upper end-face of cast iron roller ring is easy to happen. The paper analyses the method of disfigurement repairing. The disfigurement of centrifugal foundry cast iron roller ring has been eliminated by strict processing technology. Rate of finished products of the cast iron roller ring is improved by repair welding as a result.
Flatness Error Analysis Produced by Carbide End Mill Milling Plane Method
Authors: Duan Zhi Ru , Qi Jian
Published: August 2014

Improving the machining precision mechanical manufacturing field is an indispensable chapter topic. In this analysis focuses on the rail straightness, process system stiffness, milling way, cutting layer parameters, tool wear, thermal deformation of the workpiece spindle axis traverse peace pliers jaws of irregularities in the machining precision flatness influence. Milling cutting process parameters of different layers, different milling heat, different deformation of the workpiece, resulting flatness error is different. Different milling methods and different milling force also affect flatness errors. Therefore, the workpiece machining pass these factors need to be considered. And proposed a solution for uneven of flat-nose pliers jaws and surface of workpiece.
Research of Space Synchronization with Pulse Chasing and Error Analysis
Authors: Song Yao , Ma Yan Heng , Yin Yuan Wei , Li Jia Cheng , Xie Zhen Hua
Published: August 2014

Pulse chasing is an important means to achieve foundation-bistatic radar space synchronization. The principle and working process of achieving space synchronization by using pulse chasing is described which is based on a motion platform in bistatic radar; and the requirements on the receiving beam width is derived. How to cause the error of space synchronization with pulse chasing and its factors are analysed in detail, then the simulation on error of receiving beam width and beam pointing has been realized.
A Laboratory Equipment Management System Design Based on RFID
Authors: Guo Peng , Zhang Hai Yan , Liu Zhen Yong , Li Yong Wei
Published: August 2014

For the needs of laboratory equipment management, combined with development of RFID, a laboratory equipment management system is designed based on RFID. System design is briefly described. UHF RFID reader design is described in detail. The anti-collision algorithm of ISO 18000-6C protocol is partially improved, so that the reader is able to make real-time adaptations of the anti-collision algorithm using IAP according to the quantity of laboratory equipments, thus raising the efficiency of algorithm recognition. Experimental results prove that the system design has reliability, stability and certain practical value.
The Research and Design of Intelligent Photoelectric Turbidity Sensor
Authors: Ji Ying Lei , Chen Feng
Published: August 2014

The turbidity of water is one of primary indexes for water quality measurement. Existing main methods for measuring turbidity include scattering method and transmission method. The scattering method is effective for the measurement of low turbidity. Conversely, the transmission method is only suitable for the measurement of high turbidity. In this work, scattering method, transmission method and ratio method are integrated, an on-line turbidity sensor is presented. According to ISO7027 international standards, the sensor’s layout of optical path structure is realized. The detectors are laid in the direction of light source 0 degrees and 90 degrees respectively. Furthermore, the influences of temperature and light on the sensor precision are considered. Least squares support vector machine is introduced to model the turbidity sensor. The experimental results show that this method has much higher precision than the classic methods.
Testing Research and Analysis on the Dynamic Characteristic of the Models of Tooth Surface Flake
Authors: Mao Xiang Dong , Yuan Hui Qun , Sun Hua Gang
Published: August 2014

To inspect and forecast the failure of the gearbox equipment, the dynamic models of tooth surface flake are established. The thesis explores the gearbox nonlinear dynamic characteristic caused by tooth surface flake, and researches the variant joggling stiffness caused by flake failure,analyzes the primary resonance of the flake failure. By the singularity analysis, the fault causes the bifurcation mode of the gear system, which shows effect of the generation and evolution of the fault on the dynamic response of the system. Using the experimental device,the theoretical models are tested and verified.
FBG Sensing Net Analyzer for Large Complex Structures Based on Virtual Instrument
Authors: Tang Xiao Jiao
Published: August 2014

According to the requirement of large complex structure monitoring, the principle of wavelength demodulation of fiber Bragg grating (FBG) has been researched. A system model has been designed based on virtual instrument technique. The technology schemes are proposed in main aspect, such as signal processing, network communication, data storage and so on. By experimentation, the FBG Sensing Net Analyzer can measure exceed 1000 points and gives a wavelength accuracy of about ±10 pm. The strain range is ±800×10-6 and the temperature range is ±100°C, that can meet the stringent requirements of engineering practice of large complex structure.
The Research on Bus Scrambling Technology of Cipher SoC Chip
Authors: Xiong Ling , Su Yang
Published: August 2014

This paper provides a complete solution for bus security protection of cipher SoC chip from the technology of bus security protection. The structure has a scrambling transformation on the data bus of whole cipher chip with the word oriented stream cipher algorithm, and has a scrambling transformation on the address bus of memory cells especially the EFlash with more efficient Benes permutation network. Relative to the cipher SoC chip, the scrambling transformation is transparent and can ensure the security of information transferred on the bus, improve the efficiency of bus scrambling, reduce the area overhead at the same time.
Research and Design of High-Side Current AD Conversion Technology Based on ARM
Authors: Meng Kai Yuan , Cao Qing Nian
Published: August 2014

In this paper, an analog digitalized AD method of small size was proposed, which based on low-power ARM, high-resolution, high accuracy, no delay in data output. Based on SOC technology, high-side detection technology and the processing theory of error data measurement, the AD technology replaced the way to conventional monitoring current signal by mutual inductor.
Design of Micro-Embedded Positioning Module
Authors: Fu Peng Cheng , Hu Huaen , Wang Chang Ming , Zhang Ai Jun
Published: August 2014

Given the disadvantages of large volume and high power consumption of the traditional positioning device, the method of MPU with GPS chip combination to build a micro positioning device is put forward. We design the hardware circuit and program the corresponding application in this paper. The device selects the way of ultra low power working, which can improve working efficiency. The experiment results show that the accuracy in static and dynamic environment is better and it could meet the needs of the project in terms of performance.
Design and Implementation of RS Encoder and Decoder in OFDM System Based on FPGA
Authors: Cai Guang Hui , Zheng Shu Wen , Li Ping , Liang Chuan
Published: August 2014

This paper introduces the basic principle of RS codes in OFDM system and the design method of 16 shift registers, finite field multiplicators and adders, on and timing circuit are validated by using of EDA tools Quartus II. Finally, the simulation results is given and demonstrates that a good channel encoding and decoding can be achieved by using FPGA in OFDM system, which can save the cost, shorten the designing cycle , and is convenient to speed up the listing of products, occupy less hardware resources, and comply with the development trend of modern communication.
High Voltage Transmission Line Electromagnetic Environment Analysis and Research on the Human Body Biological Effect
Authors: Wang Ao , Zhu Yu Hui , Guan Rui , Chen Zi Wei , Zhao Lian Qing
Published: August 2014

The research on 1000kV UHV AC transmission lines is to analysis the electromagnetic field strength around these lines, as well as the electromagnetic energy people absorbed at different distances under the lines. What’s more, suggestions for a further study and standards to improve are provided in the paper.
H-Beam Miscrostructure with Residual Stress
Authors: Ma Jin Hong , Tao Bin , Yao Xiao Han
Published: August 2014

Different i
nternal microstructure of H –Beam has great influence on the mechanical properties. In order to improve the production technology and improve the mechanical properties of products, H-beam with a residual stress products and without residual stress products are selected and observed by metallographic experiment. The internal microstructure of productions with residual stress and without residual stress are analyzed . The residual stress influence on internal microstructure of H-beam is analyzed.
Design and Simulation of Solenoid Valve Driving Circuit Module for High Pressure Common Rail Diesel Injector
Authors: Li Jie Hui , Liu Da Wei , Shi Guo Wei , Ding Le Sheng , Zhong Guang Yao
Published: August 2014

According to the principle of BOOST and working characteristics of current mode PWM control chip UC3842, a drive circuit of injector solenoid valve was designed for high pressure common rail diesel engine, and simulation model of drive circuit was build with full use of Multisim. Through the simulation of that model and the practical application of the circuit, the results of comparison show that the design of injector solenoid valve drive circuit is reliable and can meet the working demands of high pressure common rail diesel engine, which provides a theoretical basis and practical application for hardware design of high pressure common rail diesel engine control unit.
Research on Elastic Characteristic of the Diaphragm Capsule Vacuum Packaged in Pressure Sensor
Authors: Zhao Guang Yong , He Guo , Wang Xiao Chuan
Published: August 2014

. The diaphragm capsule, one of the most important components of the vacuum pressure sensor, should have linear elastic characteristic. Make research on simulation of the diaphragm capsule packaged in vacuum pressure sensor by finite elements Analysis to obtain its elastic characteristic, and get its elastic characteristic by experiment. Compare the displacements between simulation and experiment at each load, the maximum error is smaller than 5%. The analysis results can be used for the structure design of the diaphragm capsule.
Design of PXI Digital Storage Oscilloscope Module Based on FPGA
Authors: Qiu Lei , Duan Dao Ju , Zhou Xiao , Xie Rong Yue
Published: August 2014

A digital storage oscilloscope module in automatic test equipment was designed based on PIX bus. The field programmable gate array (FPGA) is used as the logic control unit. The circuit of high speed ADC and FPGA interface, clock management, and high speed data access were designed based on hardware modules. The digital storage oscilloscope module was successfully applied to the practical test system, whose performance was good, stable, and achieved the desired design goals.
Analysis of Constant Power Load on the Effect Mechanism of the Integrated Power System Static Stability
Authors: Zhang Ling , Yang Xi Dang , Guan Fei , Zheng Cheng
Published: August 2014

A large number of constant power loads (CPLs) are included in the integrated power system (IPS). This paper firstly studied the characteristics of the load, based on which concluded the physical mechanism of static instability and the chief factors of the static stability of IPS.