bluuebunny/crossref_metadata_2025 huggingface dataset:
Comprehensive TCEP Assessment of Methods for Calculating MUAV Navigation Position Accuracy Based on Visual Measurement
Authors: Wang Yan Yong , Yang Gong Liu , Jia Xing Rong , Wang Yong Miao
Published: September 2013

in order to satisfy the positioning accuracy identification requirement of MUAV navigation system, the characteristics of visual navigation were analyzed, the existing navigation system accuracy assessment methods were summarized and the conversion relationship of each index were deduced. According to the Ethridge statistical algorithm for calculating circular error probability (CEP), navigation and positioning accuracy assessment scheme were designed. Finally, the time-CEP(TCEP) accuracy evaluation method based on visual measurement was put forward, which were verified by simulation using four group actual INS data .The results show that: the scheme is feasible, convenient and practical; the method can relatively comprehensive evaluate the positioning accuracy of navigation system and can make full use of the single trial data.
A Circuit-Based Dynamic Characteristic Analysis on the Propelling Flow System in Liquid Rockets
Authors: Yang Ming , Yang Zhi Chun
Published: September 2013

To penetrate into the study of POGO vibration, by taking the LRC equivalent circuit analyzing method, based on two boundary conditions in document [, taking the flow pulse drive into consideration, this paper proposes four boundary conditions specific to the propelling flow system in liquid rockets, and at the same time, complements the mathematic model. Further, by way of network function, under the liquid system flow parameter, this paper infers transfer function expressions, and makes the accurate solution of the natural frequency under every boundary condition. At last, from the statistic point of view, by the method of correlation coefficient, this paper studies the influence that the flow parameter may have on the system natural frequency, and set the major influential liquid flow parameter to the system natural frequency of liquid propelling flow system in liquid rockets.
Vehicle Bus System Fault Diagnosis Strategy Based on the Chart Comparison Method
Authors: Zhang Xian Hui
Published: September 2013

The bus system has the characteristics of "information sharing", the traditional automotive electrical troubleshooting techniques are difficult to competent vehicle bus system fault diagnosis. As a diagnostic method worked out in practice, chart comparison method can identify the reasons for the failure of the vehicle bus system quickly and accurately, has a certain value. By real vehicle bus system failure case, this article describes how to use the chart comparison method.
Analog Circuit Fault Diagnosis Method Based on Characteristic Layer Fusion and Improved Potential Energy Function Classification
Authors: Li Xin Ying , Sun Li Jie , Zhang Li , Zhang Da Bo
Published: September 2013

To circuit system with a transition state from normal to fault, this paper presents "sub-health" concept to describe it, and the experiments add sub-health diagnosis type. To problem of diagnosis difficulty caused by data overlapping due to tolerance existing in analog circuits, characteristic layer fusion method is selected for feature extraction, and put forward the distance evaluation factor for feature selection. Then potential energy function classification is adopted to diagnose faults, and principle of binary tree is combined with potential energy function classification to solve multiple classification problems. The experiments adopt BP neural network to compare and verify that the method proposed is effective. The results fully illustrate that characteristic layer fusion method can extract fault features effectively, distance evaluation factor has achieved a good dimension reduction effect, and improved potential energy function classification realizes soft fault diagnosis accurately.
Deep Level Transient Spectroscopy System Designed by LabVIEW
Authors: Zhou Jie , Wang Lin Jun , Sun Xiao Xiang , Teng Jia Qi , Yao Bei Ling , Xu Run , Ming Jia Hua , Huang Jian , Tang Ke
Published: September 2013

Deep level transient spectroscopy (DLTS) and photo induced current transient spectroscopy (PICTS) are commonly used methods for the identification semiconductor impurities and defects. In this paper, a measurement system of DLTS and PICTS has been developed by LabVIEW. A series of different instruments construct this systems hardware (signal generator; current amplifier; capacitance meter; oscilloscope,etc.) while software is also easy to program by LabVIEW. This system demonstrates high generality for both DLTS and PICTS, and data acquired can be stored or read in computer. By contrast, it is much lower cost comparative to commercial DLTS or PICTS system. Testing result of silicon P+N junction coincides with semiconductor theory research.
Power Cable Fault Locator Based on Synchronization Principle of Sound and Magnetic
Authors: Gao Qiao Mei , Qi Yu Lin
Published: September 2013

The synchronization method based on the sound and magnetic makes power cable precise positioning more intuitive in this paper,which based on the pre-positioning of the cable fault an accurate fault location method.First the pulse generator discharges pulse applied to the cable, the fault point will release the sound signal and an electromagnetic signal. But the electromagnetic signal propagation speeds approaching the speed of light instantaneously reaches the point of failure.when the electromagnetic signal is detected , the microcontroller timer T1 is informed. T1 starts counting until up to the sound signal is detected. the LCD will display the counting result, and along the cable to we will find the minimum point of the time value ,which is the location of the fault point.
Robust Object Tracking Based on Structural Local Sparse Representation and Incremental Subspace Learning
Authors: Shi Ying , Zhao Yan , Deng Nian Mao
Published: September 2013

We develop a robust tracking method based on the structural local sparse representation and incremental subspace learning. This representation exploits both partial information and spatial information of the target. The similarity obtained by pooling across the local patches helps locate the target more accurately. In addition, we develop a template update method which combines incremental subspace learning and sparse representation. This strategy adapts the template to the appearance change of the target with less drifting and reduces the influence of the occluded target template as well. Experiments on challenging sequences with evaluation of the state-of-the-art methods show effectiveness of the proposed algorithm.
Study on the Sensitivity of Selective Leakage Protection of Different Ground of Grid
Authors: Tu Jian , Huang Zhen Hui , Huang Zhen Juan
Published: September 2013

In view of the current direct supply situation of our coal mines high voltage distribution networks commonly used 6kV or 10kV electric cables,on the base of describing mechanism of three different neutral point grounded of underground high voltage distribution networks,detailed analysising three different grounded way of high-voltage power grid parameter sensitivity of leakage protection. The results show that, mine the sensitivity of the high-voltage grid leakage protection and start zero-sequence voltage have a great relationship, the greater the zero-sequence voltage setting value, the device's ability to detect leakage faults weaker corresponding lower sensitivity.
Singe-Phase Grid-Connected Inverter Based on Voltage-Oriented Control in Photovoltaic Generation Systems
Authors: Yang Yong , Qi Chun Qing , Suo Ji , Cao Feng Wen
Published: September 2013

The paper proposes a new control of a transformerless singe-stage single-phase grid-connected inverter in photovoltaic generation systems. The control scheme is mainly based on voltage-oriented control (VOC) with help of second order Generalized Integrator (SOGI). A cascaded control structure with an outer dc link voltage control loop and an inner current control loop is used. The currents are controlled in a synchronous dq reference frame using a decoupled feedback control. The simulated results have proven an excellent performance and verified the validity of proposed system.
Design of Multi-Channel Wireless Alarm Based on Cortex M3 Processor
Authors: Shu Chang , Jin Shuo Mei , Jing Hua Yin
Published: September 2013

Making use of Cortex M3 processor, a multi-channel wireless alarm is proposed in this paper (patent number: 201220357699.3). The proposed multi-channel wireless alarm can be used in the place where have a large number and dense monitoring points. In order to realize the target of one receiving unit and many transmitting units, the modules of PT2262/PT2272 and STM32F103RBT6 microcontroller which had Cortex M3 core were used in this system. Compared with the traditional 80C51 microcontroller systems, this design overcome the disadvantage of the IO ports of 80C51 microcontroller which only have the high level and low level stages. This disadvantage make 80C51 microcontroller could not full use the addressing ability of PT2272 address pins which could be high resistance, high level and low level stages, So the design of this paper effectively expanding the number of alarm system monitoring.
A Novel UVLO Circuit with Current-Mode Control Technique for DC-DC Converters
Authors: Zhang Yun Wu , Zhu Jing , Sun Wei Feng
Published: September 2013

A novel Under Voltage Lockout (UVLO) circuit featuring with fast response speed and low temperature coefficient threshold voltages is proposed in this paper. Compared with the conventional structure, the proposed circuit achieves the fast response ability thanks to the current-mode control technique is utilized. Meanwhile, this UVLO realizes hysteretic threshold by a feedback control path to improve the interference rejection capability. In addition, the threshold voltage varies slightly with the variation of the supply voltage and temperature by using a bandgap core. The proposed circuit implemented with 0.5μm BCD technology has an input high threshold voltage of 8.5V and a hysteresis of 1.5V, and start or shut off the power quickly. Test results verified that the proposed UVLO has the qualification to be applied to DC-DC converters.
Design and Implementation of Embedded Data Fusion System Based on 1553B Bus
Authors: Wang Qing , Sheng Lei
Published: September 2013

This paper describes the design and realization of an embedded data fusion system in airplane borne based on 1553B bus. It illustrates the total structure of the system, the design of hardware and system embedded software, such as the development of Ethernet drivers, design and package of data fusion algorithm etc.
14 Analysis on the System Configuration of Digital Substations
Authors: Ma Fei , Ma Ze Ju , Su Ying Ying
Published: September 2013

In accordance with the definition of the IEC 61850 standard, a digital substation is hierarchically distributed and divided into the process layer, the spacer layer and the station layer. On the basis of the analysis of its structure and function, this work is focused on the configuration of different layers and that of the dual bus wiring electronic transformer and merged unit, as well as the GOOSE network solution under the relay double configuration.
Simulation about Multi-Frequency Modulator of Light Impulse Used in LAPS Array
Authors: Hu Wei Jun
Published: September 2013

Two kind of frequency modulator to produce multi-frequency light impulse array and a kind of measurement system for light addressable potentiometric sensor (LAPS) array are introduced based on micro-lens and frequency modulator disk. Simulation of FFT is used to analyze the available photocurrent signals of LAPS array with MATLAB. According the simulation spectrum, the corresponding photocurrent signals of light impulse with different frequencies are able to resolve. When the duty ratio is larger than or equal to 30%,the construction of the frequency modulator can be simplified, which further prove that LAPS array with multi-frequency light impulses is provided with reliable resolution .All of above provides enough theoretical foundation for preparation and signal processing of LAPS array device .
Design and Implementation of Supporting IEEE1588 Industrial Ethernet Switch
Authors: Liu Zhuo Fu , Luo Zhong Ming , Wang Xin , Jiang Wei , Jia Ruo Chen
Published: September 2013

Aiming at the reliability of real-time industrial Ethernet, the L2 Industrial Ethernet switch is designed using VSC7429. With the respect of real-time capacity, it is based on the IEEE1588 standard by adding logic modules between MAC £ ̈Medium Access Control£© layer and PHY £ ̈physical£© layer to process the clock stamp. It eliminates the delay and uncertainty of the protocol stack and provides the accurate synchronous clock. In terms of reliability, dual hot backup power supplies were applied. Owing to the harsh environment of the industrial field, the EMC (Electro Magnetic Compatibility) protection design was considered. The performance of the switch was tested including packet loss rate and bit error rate. Experimental results showed it met the requirement of industrial Ethernet standard.
Application of Information Technology in Discus Movement
Authors: Dang Lei , Li Zhen , Sun Xiao Hua , Yang Hui Ying
Published: September 2013

The sensor technology is applied to the discus sports, which can be called digital discus, a real-time data acquisition of the moving discus information can be easily gained. The system uses statistical analysis and data mining to do analysis with these collected data. It's solved the problem on getting the accurate kinetic data and kinematics data of the moving discus for the sports like discus, and proved significant data for study athlete's technical movement and achievement.
A Survey on EPON-Based Communication Networks for Smart Grid
Authors: Sun Zhong Wei
Published: September 2013

The smart grid is emerging as a convergence of information and communication technology with power system engineering, and many network technologies can be used for communications in the generation, distribution and consumption part of the smart grid. However, finding the most appropriate technology that can satisfy their future communication needs is still a challeging issue. In this paper, we survey EPON-based communication systems for Neighborhood area networks (NAN) of smart grid, and both field based application and customer based application are discussed.
A Simulated Annealing-Based Overload Control Algorithm to Application Servers in Next Generation Electric Communication Networks
Authors: Pang Zheng , Liu Gang , Ma Wei Zhe , Meng Fan Bo
Published: September 2013

We study the overload control problem of application server in the next generation electric communication network in this paper. We introduce an energy efficiency overload control algorithm based on simulated annealing. Firstly, by considering the overload control and energy efficiency, we construct the relations function between the input rate control and energy efficiency using rate allocation. Then, we construct the optimal overload control model of energy efficiency by regarding this relation function as objective function and overload control as constraint conditions. Thirdly, we use simulated annealing algorithm to solve this model, and then obtain the optimal solution during the iterative process. The simulation results show that our algorithm is feasible and effective.
Comprehensive Spectral Analysis of HRV during Sleep and their Application in Sleep Staging
Authors: Xiao Meng , Yan Hong , Xiao Zhi Jun , Yang Xiang Lin , Yang Yu Zhou
Published: September 2013

Most studies considering spectral features of HRV during sleep divided total frequency band into low frequency (LF, 0.04~0.15Hz) and high frequency (HF, 0.15~0.4 Hz) roughly, and were limited to a few measures like the power in LF and HF, or the ratio of them. To make full use of HRV, more comprehensive spectral features were evaluated in this paper. LF was further divided into true LF (0.04~0.1Hz) and medium frequency (0.1~0.15Hz). Spectrum power, mean frequency and spectral entropy of different spectral bands, fractal dimension and peak in HF (20 measures in total) were calculated for wake, REM, light sleep and deep sleep. The significance between sleep stages of each feature was evaluated. The random forest method was adopted for sleep staging and features importance rank. The results suggested that almost all the new proposed features showed significant differences during different sleep stages. They can improve sleep stages classification performance notably. Our study provided new features for sleep stages classification based on ECG.
Unified Hybrid Free Space Optical/Radio Frequency Communication System Based on Microwave Photonics
Authors: Deng Ke , Wang Bing Zhong , Yao Zhou Shi
Published: September 2013

Hybrid free space optical/radio frequency communication systems improve reliability of links. However, independent communication subsystems increase the system complexity, weight, size, and power consumption. Based on microwave photonics, a unified hybrid free space optical/radio frequency communication system design is proposed. The communication subsystems share antenna, modulator, and demodulator to simplify system structure. Operating principle is expounded by theoretical reference, and 3dB theoretical loss is found in millimeter-wave communication mode.
Frequency-Offset Estimation of Satellite-Based AIS Signals
Authors: Liu Xiao Juan , Ma She Xiang , Meng Xin
Published: September 2013

Aiming at satellite-based Automatic Identification System (AIS) signals, a blind carrier frequency-offset estimation method was investigated on AWGN channels. Estimation algorithm that is based on the autocorrelation function and a suitable smoothing function was deduced to estimate the frequency-offset. Simulation results show that its accuracy is better than the earlier methods and reduced the computational complexity.
Design of a Novel Microstrip-Feed Waveguide Horn Antenna for Ku-Band Satellite Communications
Authors: Li Ping , Zhang Dian Fu , Hu Wei Dong , Peng Yu
Published: September 2013

Traditional land satellite communication system mostly use parabolic antenna, which is bulky and inflexible. Microtrip arraying antenna also can be used as the antenna of land satellite communication system, however, the microtrip antenna has a low gain and a large loss. In this paper, a novel waveguide horn antenna is designed. The radiation layer is perfect conductor with a octagonal hole in the center. the feeding layer is double orthogonal microstrip-feed plane to achieve bipolaron. The unit antenna size is only 21mm 21mm2.2mm. Gain of 2 2 array was 15dB. The antenna had a simple structure, small volume and high gain, particularly suitable for land satellite communications system.
Voice Service Solutions in Evolved Packet System
Authors: Huo Long She , Wang Zhen
Published: September 2013

EPS network is the future direction of mobile network, and voice service is still important in the EPS network. In the conventional 2G/3G mobile communication, voice service is provided by circuit switching in the CS domain. As the LTE core network provides the access to high-speed and lower latency wireless packet data on the air interface 3GPP retains the PS domain rather than the CS domain in designing the core network. And voice service which is included in the packet domain is available through VOIP. To ensure high-quality voice services, 3GPP proposes two solutions: CSFB and SRVCC. Each option has its own applied conditions, advantages and disadvantages. This article first introduces EPC network framework and the functions of its core functional entities. Then the network framework and voice processing of the two programs (CSFB and SRVCC) are compared. At last, a conclusion of advantages and disadvantages of the two programs is given, and it will lay the basis for different options.
A Perceptual Compressive Sensing Scheme for Image Coding
Authors: Jiang Wei , Zhu Zhi Ming
Published: September 2013

Compressive sensing (CS) is an emerging technology which can capture and represent compressible signal at a rate below the Nyquist rate of sampling. In this paper, the perceptual compressive sensing scheme is proposed. Firstly, two-dimentional Discrete Wavelet Transform (DWT) is applied for sparse representation and the perceptual feature is calculated for the different wavelet coefficient. Then the coefficients are partitioned into four blocks. According to the perceptual features, the perceptual weighted CS measurement is performed for different block respectively. Experimental results show that the proposed scheme achieves higher subjective and objective performance compared with the algorithm without the human vision system. With 40% coefficients retained, the image can still be recovered with considerably objective and subjective quality.
RBF Prediction Model Based on EMD for Forecasting GPS Precipitable Water Vapor and Annual Precipitation
Authors: Liu Yan Ping , Wang Yong , Wang Zhen
Published: September 2013

The forecast of precipitations is important in meteorology and atmospheric sciences. A new model is proposed based on empirical mode decomposition and the RBF neural network. Firstly, GPS PWV time series is broken down into series of different scales intrinsic mode function. Secondly, the phase space reconstruction is done. Thirdly, each component is predicted by RBF. Finally, the final prediction value is reconstructed. Next, the model is tested on annual precipitation sequence from 2001 to 2010 in northeast China. The result shows that predictive value is close to the actual precipitation, which can better reflect the actual precipitation change. From 2001 to 2010, the maximum deviation of the predicted values never exceeds 4%. The testing results show that the proposed model can increase precipitation forecasting accuracies not only in GPS PWV but also in annual precipitation.
Performance Improvement for Image Cipher Algorithm Based on Chaos
Authors: Jiao Hui Qin , Chen Shui Yang , Liang Yi , Yu Ding , Hao Lu , Qian Xiang Shan
Published: September 2013

The authors improve the performance of an image cipher algorithm based chaos theory. The authors do Preprocessing for the algorithm firstly, makes spatial scrambling based on image blocking in order to interrupt pixel position, then furthering this interruption through Arnold mapping, and transforms pixel RGB color space through optimized Arnold Mapping. At last, we get the final encrypted image through a series of iteration. With some theoretical analysis of security, this algorithm has a lot of advantages such as, good diffusion properties, its key space is safe enough to resist exhaustive-key-research attack, high effectiveness and resisting common attack successfully, but it needs improvements on some aspects, such as the key sensitivity.
Study on Multi-Extended-BPSK Coding and Modulation
Authors: Zhang Shi Kai , Jin Jian Li
Published: September 2013

How to improve spectral efficiency is one of the hot research topics in communication technology. UNB (Ultra Narrow Band), as a kind of modulation method that can improve spectral efficiency, has been advancing in a lot of disputation. EBPSK (Extended-BPSK) has been developed as an UNB modulation format and MEBPSK (Multi-Extended-BPSK) is also used to enhance the spectral efficiency. The details of frequency domain characteristics of MEBPSK will be investigated in this article. First, base band pulse coding is given; then, PSD expression for MEBPSK is deduced, and computer simulations are conducted with different modulation parameters, which shows that the theoretical results and simulation results are consistent. Finally, the bandwidth occupation and bandwidth efficiency of MEBPSK are analyzed according to different bandwidth definitions, a comparison is made between MEBPSK and EBPSK under the same conditions and, by analysis and experiment, it is shown that bandwidth efficiency of MEBPSK can be log2N times that of EBPSK according to-60dB definition, N is the integer power of 2, which obviously improves the data rates greatly under the same condition.
An Iterative Frequency Offset Estimation Algorithm for OFDM System
Authors: Zheng Feng , Tang Yun , Liu Hang
Published: September 2013

Orthogonal Frequency Division Multiplexing (OFDM) is considered as an important technique for future wireless communications. In addition, OFDM has a better performance at inter symbol interference (ISI). One of the major disadvantages of the multi-carrier modulation is about the sensitivity of the performance to a frequency offset. In this paper, we propose an iterative algorithm of frequency offset estimation for the OFDM system. The fundamental algorithm of our iterative algorithm is the frequency pilot aided algorithm. When we get a result with the fundamental algorithm every time, we use the result to estimate for a second time. The algorithm we proposed does not require some additional pilots or changing the data structure of the fundamental algorithm.
Effects of Nutritional Conditions on the Stable Carbon and Nitrogen Isotope of Microalgae
Authors: Wang Hai Xia , Liu Yu , Liu Ling , Bao Hui Ming , Liu Bao Zhan
Published: September 2013

Carbon and nitrogen stable isotopes were studied among different groups and species of marine phytoplankton on the aspect of growth phase and nutrient conditions. Three investigated algal species which represent the Chlorophyceae, Dinophyceae and Desmokontae classes were grown in batch monocultures and analysed for δ13C and δ15N in both exponential and stationary phase. For all the cultured species, δ13C signatures range from 24.77 (A.carterae) to 17.10 (P. micans) as well as δ15N range from-15.66(P. helgolandica) to 14.40(P. helgolandica).These three species (Platymonas helgolandicavar. tsingtaoensis,Amphidinium carteraeHulburt andProrocentrum micans) were also grown under nutrient sufficient and nitrogen or phosphorus deficient conditions. Nitrogen limitation resulted in a more negative δ13C signature, whereas no effect could be observed during phosphorus limitation compared to nutrient sufficient conditions. But nitrogen and phosphorus limitation resulted in a more positive δ15N signature. The results show that the carbon and nitrogen isotopic signature of phytoplankton may be differ among different phytoplankton species, between exponential and stationary phase, as well as between nutrient treatments.
Sucrose Transporter Gene AtSUC4 Responds to Drought Stress by Regulating the Sucrose Distribution and Metabolism in Arabidopsis thaliana
Authors: Gong Xue , Liu Ming Li , Zhang Li Jun , Liu Wei , Wang Che
Published: September 2013

Sucrose transporters (SUCs or SUTs) are considered as the important carriers and responsible for the loading, unloading and distribution of sucrose, but at present there is no report that SUCs are involved in sucrose distribution and metabolism under drought stress at the whole-plant level. AtSUC4, as the unique member of SUT4-clade inArabidopsis thaliana, may be important for plant stress tolerance. Here, by analyzing two homozygous mutation lines ofAtSUC4(Atsuc4-1andAtsuc4-2), we found drought stress induced higher sucrose, lower fructose and glucose contents in shoots, and lower sucrose, higher fructose and glucose contents in roots of these mutants compared with the wild-type (WT), leading to an imbalance of sucrose distribution, fructose and glucose (sucrose metabolites) accumulation changes at the whole-plant level. Thus we believe thatAtSUC4regulates sucrose distribution and metabolism in response to drought stress.
The Prediction Research of COD Emissions in Jilin Province Based on the Environment of the 12th Five-Year Plan
Authors: Gao Ting Ting , Li Hai Yi , Su Yan Xia
Published: September 2013

Based on Jilin province and nine cities COD emissions data of 2010, this paper is an attempt to quantitatively analyze the area distribution patterns of two indices (COD emissions per capita and COD emissions per unit production value) as well as their causes. The COD emissions from 2000-2010 and the per capita GDP to establish the environmental learning curve of Jilin province are constructed, in order to analyze the load of emission and potential mitigation. And prediction of the COD emissions discharge trend during the 12th Five-Year plan, the potential mitigation to make sure the direction of emission reduction is analyzed.The chemical oxygen demand (COD) emissions of Jilin province were 352200 tons in 2010. It was declined by 2.4% over the previous year. These emissions were accomplished 130.5% of the "11th five-year plan" emission reduction task[1]. However, in the process of urbanization, they continue to accelerate and high-speed economic growth. The task of the COD emission reduction at 8.8% is hard to achieve by 2015. Predictions can be made by using the environment learning curve on the relationship between the COD emissions and Jilin province economic development through environmental statistics. We analysed the potential reduction of COD emission of "twelfth five-year" in Jilin province and determined the direction of emission reduction.
Research and Design on Intelligent Decision Support System Frame for Vehicle Maintenance
Authors: Yu Kun , Wang Fang
Published: September 2013

This paper analyzes current research results of IDSS and researches the knowledge of vehicle maintenance. By using technologies such as expert system (ES), Data warehouse (DW), fault tree automatic generation, intelligent interface etc. based on the development process and characteristics of IDSS, this paper combines both virtual maintenance and fault diagnosis together, presenting an intelligent decision support system framework for vehicle maintenance with intelligent , interaction and integration.
China's Energy Use and CO2 Emission Efficiency
Authors: Zhang Hong Wu , Yin Jia Hui , Shi Lin Yun
Published: September 2013

Energy efficiency and CO2 emission efficiency have been improved from 2005 to2010 in China, but the inter-provincial differences was larger. The provinces have the higher efficiency, which are located in the eastern coastal areas or the southern regions. The provinces have the lower efficiency are located in the central and western inland areas or northern regions. There is a very close relationship between energy use and CO2 emission efficiency in China. Energy saving is the biggest dominant factor of CO2 emission efficiency improvement. Energy conversion plays a efficiency improvement role in some provinces. But industrial structure is the biggest factor hindering the improvement of CO2 emission efficiency. In the future, we should focus on the rational use of energy, regard energy conservation as the dominant factor of carbon emission efficiency improvement, and excavate the enormous potential of the energy conversion factor and expansion the industrial structure factor effect through industrial transformation.
Heat and Mass Transfer Analysis of Mine Exhaust Air Heat Exchanger
Authors: Li Qiong , Niu Yong Sheng , Sun Yi Xiang , Liu Zhe
Published: September 2013

As a good energy resource, Mine exhaust air has an important value of recycling. In this paper, the heat and mass exchange mechanism and potential of the mine exhaust air heat exchanger (MEAHE) is mainly researched. The heat exchanger efficiency is affected by water and air temperature and flow in terms of double efficiency method. The result can provide the basis for the further determine the thermal calculation method for MEAHE, and lays the foundation for the mine comprehensive utilization of waste heat recovery system design.
Study on Knowledge Based System for Integrated Water Resources and Environment Management at County Level
Authors: Li Shu Yuan , Tao Jian Hua , Yu Lei
Published: September 2013

In order to improve the capacity of integrated management on water resources and environment at county water conservancy and environmental protection departments, a knowledge based system for integrated water resources and environment management have been developed and operated at 16 counties in the north of China. The information technologies such as knowledge discovery approaches, GIS and middleware have been applied in the development of the system. The System provides services of information management, business management, including permit management of water intake and pollution discharge. The integrated management planning platform was developed based on SWAT model. These services of the system have significantly improved the capabilities of information exchange and sharing as well as the integrated water resources and environment management at county level.
An Improved Fuzzy Evaluation Method for Industrial Wastewater
Authors: Li Yong Shu , Xu Li
Published: September 2013

To evaluate the levels of industrial wastewater is very important; it can help us to deal with it. In some case, some factors are the key pollution cause; we need to focus our attentions on them. But the classical fuzzy evaluation method had some limitations to resolve this kind of pollution levels evaluation problems. we analyzed the classical fuzzy evaluation method to find the shortcomings of the it firstly, and then improved the fuzzy evaluation method by changing the weighting of the factors in order to highlight the key factors. The result of cases studied shows that the method presented in this paper is more reasonable to the problem.
Sensitivity of Hydrological Model to Landscape Pattern Change
Authors: Wei Chong , Chen Jie , Song Xuan
Published: September 2013

The hydrological model is a tool to simulate the hydrological processes and to solve the practical problem. The composition and spatial configuration of landscape often result in variation of hydrological conditions. This study is applied to compare the results of SWAT model with different land use maps in Qihe watershed, and shows that the sensitivity of SWAT model to landscape spatial configurations at landscape level is weak, except the landscape composition. After model calibration, both models satisfy the observed data well, which means though the land use map beyond the real landscape spatial configurations, the SWAT model could also describe the water yield of Qihe watershed accurately during the validation period.
Spectral Characteristics of Cr and Cu in Agricultural Soil at Beijing Plain Based on SWIR Spectroscopy and PLSR
Authors: Li Shu Min , Li Hong , Sun Dan Feng , Zhou Lian Di
Published: September 2013

Heavy metals pollution in agricultural soils has been an important problem to human health, mapping large-scale spatial distribution of soil heavy metals is urgently needed. Instead of traditional methods, time-consuming and destructive, soil properties predicted by remote sensing technology shows a lot of advantages, which makes large area of real-time dynamic monitoring as possible. However, before achieving prediction using spectra data, the first thing to do is that finding the spectral characteristics of soil heavy metals. In this paper, taking Cr and Cu for example, the correlations between soil heavy metals content and laboratory-measured reflectance is studied using partial least squares regression (PLSR), which is an adaptive method to examine linear between spectrum and concentration. First of all, using the raw spectra, remove outliers of heavy metals concentration by PLSR modeling. Next, though comparing RMSEC and RMSEV against PLSR components, and cumulative explanatory of spectral components to metal content using different pre-precessing methods, find the right pre-pcocessing is CR and optimum number of components to Cr and Cu are 3 and 2 respectively. Simultaneously, with the meaning of PLSR models regression coefficients, we analysis the spectral characteristics of Cr and Cu, although can not to realize the prediction only take use of these spectra, which is still essential to achieve simulating spatial distribution of soil heavy metal by remote sensing.
Property Research of Green Concrete Mixed with Lithium Slag and Limestone Flour
Authors: Wen He
Published: September 2013

With the wide spreading of wireless devices like mobile and tablet PC, lithium ion battery becomes largely used. During the production of lithium ion batterys raw material, large numbers of lithium slag would come into being whose main chemical components are LiO2,SiO2,Al2O3 etc. Meanwhile,with the rapid developing of urbanization, realty business develops rapidly which leads the use of cement concrete to sharply increase. However, production and application of cement greatly destroys the environment and increases its burden. In order to decrease this kind of burden, an effective method is to decrease the content of cement in concrete per unit volume. If lithium slag is applied to supply cement, not only cement would deduce its damage to environment but also lithium slag may turn waste into wealth. This paper uses composite of levigated lithium slag and limestone flour to research the property of green concrete mixed with lithium slag.
Interfacial Properties for MEA and MEA-Water Mixtures
Authors: Wei Lin , Hao Hui Min , Feng Lin , Fu Dong
Published: September 2013

The perturbed-chain statistical associating fluid theory (PC-SAFT) and density-gradient theory (DGT) were used to construct an equation of state (EOS) for the bulk and interfacial properties of monoethanolamine (MEA) and its aqueous solutions. The molecular parameters and influence parameter were regressed by fitting the experimental data of phase equilibria and surface tensions. With the molecular parameters and influence parameter as input, the surface tensions of MEA aqueous solutions were correlated satisfactorily.
Research about Difficulties and Measures of Computer Aided Mass Assessment in China
Authors: Wang Rui Ling , Li Shi Rong , Deng Xiao Lin
Published: September 2013

Computer aided mass assessment technology could be given consideration to both efficiency and fair, and could be finished large scale house assessment with low cost and high efficiency in short time. But, there are some difficulties in mass assessment technology in collecting house tax in China and it is difficult for people to carry it out. The article discusses the difficulties in establishing mass assessment mode in collecting house tax in China and puts forward some countermeasures.
Third-Party Logistics System Based on Lean Logistics
Authors: Han Wei Wei
Published: September 2013

Currently the development of third-party logistics enterprises in China is facing opportunities and challenges, and urgently needs new management model. This paper discusses the third-party logistics system based on lean logistics from four aspects: lean-agile distribution, value stream analysis, the SLP and information platform construction. This study establishing a new management model provides innovative ideas and methods to third-party logistics enterprises to effectively promote the transformation and upgrading of the third-party logistics business models.
Information System Construction of Spare Parts Supply Based on Supply Chain
Authors: Zhao Wu Kui , Zhang Cheng , Zhao Xiang
Published: September 2013

Equipment spare parts in equipment maintenance play an important role in the management, maintenance and repair of damaged equipment. Information system of spare parts supply is constructed based on supply chain. The generic configuration of supply chain is introduced, based on which the information system of spare parts supply is established. The proposed information system includes three levels. The lowest level is spare parts supply entity level which mainly includes all sorts of entities involved in spare parts supply activities. The middle level is spare parts data collecting level which including information resources integrating platform and spare parts information data collecting platform. The highest level is spare parts data releasing level which includes common information platform and management information platform. The optimization of spare parts supply system architecture is also proposed through analyzing the business process of spare parts. The proposed information system architecture provides an effective method and design thought for spare parts supply chain design and optimization.
Research on the Relationship between Behavior Idiosyncrasies of Independent Director and Corporation Performance
Authors: Ling Ding Sheng
Published: September 2013

The paper analyzes the relationship between behavior idiosyncrasies of independent director and corporation performance. The research indicates that attendance meeting times of independent director and the supervision proposal have great positive impact on corporation performance, but strategic proposal has negative influence on corporation performance. And the quantity of proposal has certain positive relationship between corporation performance.
High and New Technology Enterprise Information System Design and Implementation Based on Automation Technology
Authors: Ma Meng
Published: September 2013

The Twelfth Five-Year Guideline came on stage,which promoted the transformation of the mode of economic development. In the implementation of innovative national strategy process,High and new technology has become the main growth point to the economic development of our country.However,Based on their own characteristics,it is difficult for high and new technology enterprise to obtain the funds required for the enterprise development by the traditional way. This will seriously restrict the development of the enterprise. Based on the life cycle theory as the foundation,this paper deeply analysed high and new technology enterprise stage characteristics in the life cycle and put forward the suitable financing strategy ,aiming at Each stage different characteristics.
The Permanence of a Ratio-Dependent Lotka-Volterra Predator-Prey Model with Feedback Control
Authors: Wang Chang You , Li Xiang Wei , Yuan Hong
Published: September 2013

This paper is concerned with a Lotka-Volterra predator-prey system with ratio-dependent functional responses and feedback controls. By developing a new analysis technique, we establish the sufficient conditions which guarantee the permanence of the model.
Aviation Maintenance Safety Culture Safety Management Mechanism Based on System Dynamics Simulation
Authors: Zhang Dong Feng , Duanmu Jing Shun , Lian Wan Xiang , Liu Duan , Zhang Yan
Published: September 2013

The paper illustrates mechanism construction and analysis of aviation service safety culture on safety management based on system synamics (SD),analysis and set up the parameter.The model gets better results through a simulation.And based on the simulation,construction the influence mechanism of aviation service safety culture on aviation service safety management.
Instruments Warehouse Management System in Power Industry Based on Sensor Networks
Authors: Lai Jing Ming , Wang Shi Hong , Xue Feng , Liu Ke , Chen Jing
Published: September 2013

By employing sensor technology, control and network communication technology, we develop an intelligent instrument warehouse management system (IWMS) oriented to a typical instrument warehouse in power industry. We develop, test and improve the control hardware module, the instrument status indication module and the related software program. We also make the operational processes, provide a visual and intuitive operator interface, and realize and optimize the functions such as account management, query, breakdown alert and repair report. The implementation in Dongguan Power Supply Bureau reveals that IWMS optimizes the check-in and check-out process for the instruments, shortens the registration time, achieves the goal of automatic statistics, and improves the efficiency for instrument management and the operation productivity.
Simulation of Wheel Slide Protection System for Railway Vehicles
Authors: Wang Zong Ming , Zuo Jian Yong
Published: September 2013

Computer simulation was used to study WSP (Wheel Slide Protection) system in this paper. The model of WSP system was built. Simulation model can avoid real vehicle tests or laboratory bench which will cost a lot of time and expenses. The WSP system model was composed of pneumatic model, mechanical model and control model. Three models were connected with each other and formed a closed loop system. The result shows that the simulation model has most characteristics of WSP system. The model can be used in the study of WSP system instead of the real system.
A Cutting Force Model for Face Milling Operation
Authors: Tang Dong Hong , Lu Fang
Published: September 2013

Based on the geometry of the cutter, the dynamic force model of face milling was established. Meanwhile, the fast and effective identification method of milling force model coefficients was provided, which combining the virtues of both orthogonal design theory and partial least-square regression (PLSR) method. Milling experiments have been conducted to verify the proposed face milling force model. Good agreements between the experimental and simulated results were presented.
A Bidirectional Quintuple Tree Node Expansion Algorithm for UAV Path Planning in Dynamic Environment
Authors: Gong Jian Hong , Li Bo , Gao Xiao Guang
Published: September 2013

To deal with the problem of penetration trajectory planning for UAV security issues, an improved bidirectional quintuple tree node expansion algorithm is proposed. Compare to traditional quintuple tree node expansion algorithm, the proposed algorithm could reduce the number of the expanded tree node, and it makes the bidirectional quintuple tree node expansion algorithm more efficient in path planning. By combining the bidirectional quintuple tree node expansion algorithm with multi-step optimization search mechanism, a kind of real-time UAV path planning algorithm is presented.
Dynamics Simulation and Analysis of Planetary Reducer
Authors: Ling Ling , Yi Yuan Yuan
Published: September 2013

Taking a planetary reducer in an electric vehicle as the object of study, a rigid-flexible coupling model was established to perform the dynamics simulation. The variational regularities of the meshing forces, output speed and acting forces of bearings were obtained, and then a finite element analysis of the planet carrier was carried out. This method can not only solve the problem of the boundary conditions of planet carrier which are difficult to define in finite element analysis, but also improve the accuracy of analysis results when the influence of carrier flexibility on the whole system is considered in dynamics simulation, which lays the foundation for further research on reducers.
The Contrast for Offset Method of Catmull-Clark Subdivision Surface
Authors: Yuan En Tao , Shao Bing
Published: September 2013

The offset surface for Catmull-Clark subdivision surface is accomplished in this paper. Currently, the offset methods main two ways, one is directly offset method and the other is inverse iteration offset method. Firstly, this paper summarizes the offset principle for the two offset methods. Secondly, define Catmull-Clark subdivision surface as the research target, the offset surface is obtained by used two offset methods. Lastly, as a case study for molar restorations, the offset error is discussed for two offset methods.
A Fast Adaptive Transmit Power and Bit Allocation in OFDM System
Authors: Wen Juan , Tian Qi Ming
Published: September 2013

In this paper, we propose a fast and optimal adaptive transmit power and bit allocation algorithm, which is called Bisection Searching Level (BSL) for wireless OFDMA systems. The algorithm aims at maximization of data rate under the constraints of total transmit power and bit error rate (BER). BSL is based on water pouring approach, and adopt bisection algorithm to find the water pouring level under discrete bit restriction. Both theoretical analysis and simulation results demonstrate the optimality of our proposed algorithm.