bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigations of the Energy-Saving Technology of a Cloud Computing Data Center
Authors: Yue Yu , Jiang Wen , Zhang Zhang , Wang Chen , Shao Zong You , Tang Zhi Min , Shen Wei Dong , Li Ke , Liu Guang Hui
Published: May 2014

This paper shows the energy consumption distribution of current data center, presents some effective energy-saving measures to reduce the energy consumption of a cloud computing data center. Raise an effective way to optimize the air distribution of the data center such as sealing the cold passageway. Through the use of ADU can solve the local overheating inside the equipment cabinet. The use of the modularization UPS, the high-voltage direct current technology and harmonic suppression can improve the efficiency of the power supply system.
Systematic Analysis of Coal Miners’ Safety Behavior Based on System Dynamics Model
Authors: He Gang , Zhang Hong , Qiao Guo Tong
Published: May 2014

Case study of 300 typical coal mine accident indicates that coal miners’ unsafe behavior is the major internal reason causing coal mine accidents. Factors affecting coal miners’ unsafe behavior were identified because of human’s complexity. We built the relatively entire system of coal miners’ safety behavior and quantitatively analyzed Coal miners’ unsafe behavior system, then explained the path and divergence of impact factors within the system in detail. Management decision can be formulated to advance management level in coal mine industry accordingly.
Research on the Friction and Wear Properties of the Copper Matrix Composites Reinforced with Copperized Carbon Fibers
Authors: Xu Ran , Wang Yong , Liu Run Hong , Zou Hao
Published: May 2014

The aim of this paper is to develop a kind of copper matrix self-lubricious material with excellent friction and wear characteristics. The copper-graphite composites reinforced with short copper-coated carbon fibers (CF-C/Cu) were successfully developed using techniques of mechanical alloying, composite plating and hot press vacuum sintering. For comparison, copper-graphite composites without short copper-coated carbon fibers (C/Cu) were made under the same process. The wear testing was carried out using a rapid wear testing machine (M-200).Friction coefficient was measured by a micro-wear tester (UMT).The microstructure, abrasive dust and worn surface of the wear pins on the different condition such as load and wear time were examined by SEM. It was noted that the addition of copper-coated carbon fiber in the Cu-based composites can retard the transformation process which transforms from micro-cutting wear to adhesive wear and delamination. The abrasion loss of the composites with short copper-coated carbon fibers appeared a valley when the load increased from 10N to 30N. It showed that the addition of copper-coated carbon fiber enhanced the anti-friction and anti-wear property of copper matrix composite and better than the sample without carbon fibers.
A Cloud Security Situational Awareness Model Based on Parallel Apriori Algorithm
Authors: Liang Xiao , Lv Hong Wu , Guo Fang Fang , Wang Hui Qiang
Published: May 2014

Network Security Situation Awareness (NSSA) is a hot topic in network security field, and cloud computing is a new technology integrated virtual storage and distributed computing. It has become the challenging questions how to provide efficient and reliable service for NSSA based on the cloud computing.This paper proposes a cloud security situation awareness model based on data mining, and puts forwarda parallelfrequent-tree Apriori algorithm (PFT-Apriori) for mining association rules. Compare with the traditional Apriori algorithm, the experimental results show that the performance of system is increased by 51% under PFT-algorithm.
“Soft Error” Correction Method Based on Low Complexity Coding and Encoding Algorithm
Authors: Wei Yan Kang , Wang Da Ming , Cui Wei Jia
Published: May 2014

SEU is one of the major challenges affecting the reliability of computers on-board. In this paper, we design a kind of encoding and decoding algorithms with a low complexity based on the data correction method to resolve the data stream errors SEU may bring. Firstly, we use the theory of linear block codes to analyze various methods of data fault tolerance, and then from the encoding and decoding principle of linear block codes we design a kind of encoding and decoding algorithms with a low complexity of linear block code, The fault-tolerant coding method can effectively correct single-bit data errors caused by SEU, with low fault-tolerant overhead. Fault injection experiments show that: this method can effectively correct data errors caused by single event upset. Compared with other common error detection or correction methods, error correction performance of this method is superior, while its fault tolerance cost is less.
Random Linear Network Coding with Probabilistic Polynomial-Time Wiretap Adversary
Authors: Hu Zhi Wen , Wang Xian Ming , Lv Tao Tao , Zhao Shan Shan , Jing Rui Jun
Published: May 2014

Linear network coding can achieve the network capacity in the single source multicast case. For the single source multicast network with wiretap adversary, the paper of Cai and Yeung constructs an information-secure linear coding which tightly achieves the transmitting rate upper bound , where is the capacity of the network and is the maximum number of edges the adversary can wiretap. The current paper considers the cryptographic security for the messages in the random linear network coding setting. The indistinguishability under chosen-message-attack (or CMA-Security) from probabilistic polynomial-time (PPT) wiretap adversary is defined. With a pseudorandom generator against linear cryptanalysis, an end-to-end protocol is constructed for multicast network using random linear network coding. When the adversary wiretap less than edges, the protocol is CMA-Secure and attains transmitting rate approaching the network’s capacity from below, asymptotically in the expanding ratio (i.e., length of output string/length of input string) of the pseudorandom generator. Compared with secret-key based scheme, no secret is needed by the receiver nodes, which means the key managing issues for dynamic networks would never come up.
A Methodology for the Emulation of Object-Oriented Languages
Authors: Li Xiao Fang
Published: May 2014

The refinement of the partition table has improved semaphores, and current trends suggest that the improvement of public-private key pairs will soon emerge. Given the current status of cooperative communication, theorists famously desire the natural unification of 802.11b and the producer-consumer problem . We disprove that simulated annealing can be made relational, unstable, and certifiable.
Study on the Phenomenon of College Students' Network had a Crush on and the Educational Guidance
Authors: Zhang Jin Hai , Zhang Hua Jing , Zhao Song Song , Cui Zhen Xun
Published: May 2014

With the popularity and development of application of network in colleges and universities, students enjoy the convenience of learning and school life network at the same time, it could also be that excessive and irregular use and create network obsession or addiction led directly to an increase in psychological problems among college students, lack of ideals and beliefs, moral quality of landslide, thus affecting the students ' healthy and smooth growth. How to educating and guiding college students, the prevention and resolution of network with negative consequences for physical and mental development of college students, into a new era, the new situation of ideological and political education of college students under the subject of intense interest.
Application about Proteus Simulation on SCM Teaching
Authors: Xiong Chun Ru , Xie Fu Zhen
Published: May 2014

Principles and applications of electricity are involved in an important professional foundation courses. MCU development capabilities, including hardware design and software programming skills are basic capacity. This paper introduces an application of Proteus simulation on SCM teaching. Proteus breaks the space limitations of traditional training room with time and space constraints. The use of spare time, as long as there is a computer in a place, it can be single-chip hardware design and software programming exercises for students to improve SCM integrated development capability, practical spirit, the spirit of innovation culture to build a convenient and flexible platform.
Study on Ecological Footprint of Campus Paper Consumption
Authors: Sun Dong , Song Guo Bao , Zhang Shu Shen
Published: May 2014

With the recognition of sustainable development improving gradually, low carbon campus construction has become a trend in international society. The ecological footprint model is a kind of effective method to measure the sustainable development and have some reference for low carbon campus study. Our case study is the ecological footprint of paper consumption in Dalian University of Technology, China. The results show that nearly 481.60 hm2 of ecologically productive lands were needed to support paper consumption and this means that the land consumed by the university is 2.28 times larger than its physical or built-up land. Within 2011 academic year, the reused paper flow was added up to 237.69 tons, of which library contributed the most with 164.98 tons and the remaining 72.71 tons came from secondhand books obtained from last academic year 2010, finally saved nearly 578.33 hm2 of forest land.
Satisfaction Assessment of Technology System of Systems
Authors: Li Meng Jun , Chang Lei Lei , Dou Ya Jie
Published: May 2014

The Technology System of Systems (TSoS) studies the technologies, as well as the connections among these technologies which were derived from the capabilities requirements and systems requirements. The TSoS related Concepts and studies are introduced. A methodology to the generation and assessment to TSoS is proposed. The generation of TSoS is based on the characteristics of different technologies and corresponding capabilities/systems requirements. The assessment of TSoS is divided as the readiness assessment and the satisfaction assessment. Only the satisfaction assessment is concerned in this study. The TSoS satisfactions assessment studies how well certain technologies can satisfy varied TSoS requirements. A case is studied to validate the efficiency of the proposed methodology using sixty technologies derived from the US weapon acquisition report for the 2012 fiscal year.
Researches on Virtual Enterprise Customer Relationship Management Technology
Authors: Wang Ni , Cai Dong Dong , Zhang Tian Rui , Zhang Xu , Li Kai
Published: May 2014

According to characteristics of virtual enterprise customer relationship, virtual enterprise customer value evaluation system, in which Analytic Hierarchy Process (AHP) was used to solve the weight of each index, was established. Then the performance of each customer was rated with expert evaluation method, and the calculation of customer value model was set up. The model were verified through practical examples, and cluster analysis of customers was dealt with the customer value. The verification results were consistent with the results of the analysis, to illustrates the feasibility and reliability of the evaluation method. Finally, MatlabGUI tools were used to develop the interface of graphical user which could improve the efficiency of the customer relationship management.
Axial Behavior of Concrete-Filled Double Skin Steel Tubular Stub Columns Filled with Demolished Concrete Lump
Authors: Wang Yan Ze , Li Bai Shou
Published: May 2014

To analyze the axial compression bearing capacity of concrete filled double skin steel tubular (CFDST) stub columns which are filled with demolished concrete lump, twelve stub columns are tested. The main experimental parameters were the diameter-to-thickness ratio, mixing ratio and hollow section ration.Load-displacement curves and failure mode were analyzed, the compressive capacity determined from related design rules were compared with the peak load obtained in the tests. All specimens have a good performance of ductility and late bearing capacity. When the width-thickness is 72 and have a same mixing ratio, CFDST have the same bearing capacity with CFT. When the mixing ratio is 0 and width-thickness is 120, the bearing capacity of CFDST increase 16% than CFT. When the new concrete have similar compressive strength with old and mixing ratio is 25%, the bearing capacity of CFDST increase 18.8% than CFT.
Exploration and Implementation of Unified Payment with the Telecom-Based E-Lottery System
Authors: Ran Yi Jun , Xiao Ying
Published: May 2014

With the wide application of the fixed telephone services and the increasing demand from enterprises and institutions, based on the unified payment platform to purchase an electronic lottery system, a system which is based on browser/server structure, developed modelling on the MVC (Model - View - Controller) design pattern, and is mainly based on the design and development of a unified payment platform, unified payment that falls into such categories as business management, payment engine, the three-channel gateway, in the form of various functional components of an abstract package and through the process engineering series for each function processing chain. Abstract business differences in parametric configuration, defined business processes through product configuration, in a unified channel gateways for different formats, different standards for each channel to send and receive packets processed. Under the unified payment System developed web payment lottery, fixed telephone payment lottery, data acquisition synchronization summary, and simulation billing functions.
Experimental Research on Tensile Strength of Premixed Concrete at Early Ages
Authors: Li Xiao Fen , Ren Ping
Published: May 2014

The splitting tensile method for the tensile strength of concrete is usually used in structural applications, so it is great important in the investigating the relation between the direct tensile strength and the splitting strength. But the relationship between the splitting strength and the direct tensile strength is not consolidatly confirmed at home and abroad. In order to obtain the exact results, the experimental apparatus for concrete of the direct tension are designed, which resolves the difficulty of ensuring that the load is truly axial. Tests of the direct tension are performanced on three different concrete mixes (C20,C40,C60) at 3, 7, 14 , 28 and 60 days and the test data do not scatter. The relations between the tensile strength and the cube compressive strength are obtained and a formula for investigating the relation between the direct tensile strength and the splitting strength are proposed.
Research on the Collapse Performance of RC Frame Structure
Authors: Zhao Jing , Zhao Jing , Liu Xing Wang
Published: May 2014

In collapse-resistant design of a structure under accidental local action, it is important to understand the failure mechanism and alternative load paths. In this paper, a pseudo-static experimental method is proposed. Based on which, the collapse of frame structure was simulated with testing a 1/3 scale; 4-bay and 3-story plane reinforced concrete frame. In the experience, the middle column of the bottom floor was replaced by mechanical jacks to simulate its failure, and the simulated superstructure’s gravity load acted on the column of the top floor by adopting a servo-hydraulic actuator with force –controlled mode.
The Dynamic Characteristics and Design of a Plate Sewage Heat Exchanger
Authors: Sun Dong Fang , Qin Na , Feng Lei
Published: May 2014

According to the design parameters of the actual project. In this essay, the plate heat exchanger will be selected as the heat exchanger of secondary sewage-source heat pump system . The plate heat exchanger was designed first calculation, according to the selected plate heat exchanger structure size, flow rate of the change on the influence of the dynamic characteristics, such as inlet velocity and outlet velocity on wall temperature, the influence of different inlet velocity variation signal effects of curves for exit temperature, etc.
Analysis of Reliability Calculation and System Analysis of Gravity Retaining Walls
Authors: Zhou Gui Mei , Li Yan , Zhang Fan
Published: May 2014

The reliability indexes of the two unstable modes of the gravity retaining walls were calculated by the first-order second-moment theory through setting up the fundamental model. Results evaluated are compared with the results which is evaluate by the safety factor method, and it shows that there is still a certain degree of probability of failure of gravity retaining walls , even though they meet the checking conditions of "Safety Factor" method .The analysis shows that the failure probability of sliding stability is approximately equal to the failure probability of the entire system stability. And the stability of sliding of the gravity retaining walls should be payed more attention during the process of design checking calculation.
Environmental Noise Source Identification Based on Sound Pressure and Sound Intensity Integrating Techniques
Authors: Chang Kai , Wang Jian Wei , Yu Xiang Lei
Published: May 2014

In view of the traditional methods can not accurately identify the far field of the problem of sound source location,Sound pressure and sound intensity combination technique is proposed for identifying environmental noise source. Using the method of sound pressure can test the size of the noise sound pressure and sound intensity method can identify the noise source bearing characteristics identify the noise source. The technology of this noise identification is applied to identify Noise of boundary of a factory and then finds out the main noise source. Test results showed that: Causing the plant boundary noise source are the 3rd, 5th, 6th, 7th sound source, therefore the solution of reducing noise at boundary is developed.
Design and Implementation of Remote Sensing Extraction System of Rural Circulation Land
Authors: Cheng Peng , Wu Hua Rui , Zhu Hua Ji
Published: May 2014

Hollow village is a widespread phenomenon all over China nowadays. Finding out the potential utilizable land in rural region and promote the land circulation is of great significance to holding the arable land above the red line of 1.8 billion mu in China. In this study, the image characteristics of circulating land in the study area was analyzed firstly. Then the homestead and wasteland were extracted using object-oriented remote sensing information extraction technology, which include multi-scale image segmentation and establishment of extraction rules based on ENVI. After that the purpose, function and features of extracting system of rural circulating land by remote sensing were explained and the development approach of integration of remote sensing and GIS was discussed. The ENVI/IDL secondary development library platform combined with secondary development tools ArcGIS Engine was adopted. Extracting circulating land by remote sensing images, spatial analysis and mapping functions were realized in this system, using COM technology for multi-language and multi-platform hybrid programming.
Study on Design Method for Asphalt Overlay on Old Cement Concrete Pavement in Shanxi Province on Trunk Highway
Authors: Wang Hui , Zhang Jiu Peng
Published: May 2014

In view of the the imperfection of design method of asphalt overlay on old cement under heavy-load traffic, and with the background of a successful practice of repaving improvement project in Xia Jiaying-Fen Yang expressway, this article analyzes the mechanical response of the old cement concrete road slab and the overlay, takes the influence of the void under slab on the life expectancy of asphalt overlay into account, and advances the mechanistic-empirical design process of asphalt overlay under heavy-load traffic. In comparison with Chinese standard, this method takes the influence of old concrete pavement on the reflective cracking of overlay into consideration, which ensures that there is no reflective cracking on the overlay in 3 years.
HPLC Method for Bacillamide C Analysis in the Metabolites of a Bacillus atrophaeus Strain
Authors: Jin Liang Jie , Liang Cheng Hong , Zhang Yong , Li Zhi Yong
Published: May 2014

A new HPLC method for the analysis of bacillamide C, with DAD detector at 220nm, has been developed, validated and used in the EtOAC extracts of the fermentation broth of a Bacillus atrophaeus strain, associated with the South China Sea sponge Dysidea avara. Bacillamide C was well quantified on a reversed phase ZORBAX Eclipse XDB-C18 column by use of a gradient mobile phase from 20% (v/v) acetonitrile to 45% (v/v) acetonitrile in 15 min at a flow rate of 1 mL/min. The linearity ranges were 1.00-1000.00μg/mL with values of LOD (limit of detection) equal to 0.15μg/mL. The HPLC method was proved simple, feasible and reliable by a series of method validation experiments about linearity, accuracy, precision and stability.
Quantitative Structure-Retention Time Relationship for Retention Time of Coffee Flavor Compounds
Authors: Zhang De Xiang , Si Hong Zong , Liu Xun
Published: May 2014

The coffee flavor compounds acquire a significant place in the improving the flavor of cigarette. In the present paper, the support vector machine is used to develop quantitative relationships between the retention time and four molecular descriptors of 52 compounds. The model of support vector machine gives good statistical results compared to those give by multiple linear regressions and support vector machine. The contribution of each descriptor to structure-retention time relationships was evaluated. It indicates the importance of the atoms number and type of parameter. The proposed method can be successfully used to predict the retention time with only four molecular descriptors which can be calculated directly from molecular structure alone.
Electroless Nickel Plating on Copper Foil
Authors: Tang Zuo Qin , Hu Su Rong , Chao Yin Chun
Published: May 2014

A pre-cleaning and an electroless nickel plating (EN-HP) were applied to copper foil to improve its tribological behaviour and corrosion resistance. The coating porosity was measured by the corrodkote, tribological behaviour was measured with microhardness tester and a CSM ball-on-disk tribometer, corrosion resistance was measured by potentiodynamic polarization in 3.5 wt.% NaCl solution. Matte nickel plating (mNi) and moderate compact Ni–P coating (EN-MP) were made as comparisons to EN-HP in those tests. By deposition of EN-HP, both coating porosity and tribological behaviour are greatly improved compared to mNi, and the corrosion resistance is distinctly ameliorated to the comparisons. Above research demonstrates that the copper foil with EN-HP coating is good underlay in assemblage of machine.
Analysis of the Development of Residents Electronic Health Records
Authors: Ning Liu
Published: May 2014

The popularity and improvement of resident’s electronic health records plays a vital role in the improvement of human’s overall health. The basic situation of the construction of residents electronic health records and the implementation of the project progress in a few representative countries all over the world in recent years were been summarized and analyzed in this paper after thorough investigation and research. Some problems existing in the construction and Application process of residents electronic health records were been pointed out, and the development focus of residents electronic health records project in next few years were been pointed out to be the popularize and strengthen of the application of data mining.
Expression and Purification of Serine Protease Inhibitor, OH-TCI, in Escherichia coli as a Thioredoxin Fusion Protein
Authors: Sun Tong Yi
Published: May 2014

The OH-TCI was the first report of Kunitz/BPTI serine proteinase inhibitor from snake venom with strong inhibitory activity against trypsin and chymotrypsin. Thus it is theoretically attractive in ameliorating the effects of acute pancreatitis and reducing allogeneic blood product transfusion during cardiac surgery. To accomplish preclinical evaluation with OH-TCI, large-scale production of OH-TCI is produced in Escherichia coli. The optimized OH-TCI codons were cloned into pET32a (+). OH-TCI expressed as Trx tag is solubility as fusion bodies. The amount of the purified Trx-OH-TCI from 1 liter culture was roughly 200 mg. The inhibitor constants (Ki) of Trx-OH-TCI, similar to the native OH-TCI, were 2.67×10-7 and 3.60×10-7 M M for trypsin and chymotrypsin, respectively.
Medicinal Material Quality Analysis and Evaluation of Paris Plant
Authors: Yang Hua , Xin Ben Hua , Tong Kai , Tian Meng Liang
Published: May 2014

Purpose: Determine the changes of saponin content in Paris polyphylla and analyze the correlation among them to provide theoretical basis for determining the best harvest scheme and clinical Paris polyphylla research; determine the similarity between wild Paris polyphylla and statutory Paris polyphylla, and explore expanding base sources of Paris polyphylla. Method: Adopt HPLC technology, build fingerprint of Paris polyphylla, and determine the content of all polyphyllin. Results: The contents of polyphyllin in different growing years have obvious difference, and the correlation among the compositions in the classification of dioscin is significant, while the correlation among the compositions in the classification of pennogenin is not obvious; the fingerprint of Paris delavayi Franchet and Paris mairei Leveille and the similarity of statutory Paris polyphylla are basically identical. Conclusion: The content of polyphyllin is not the single accumulation of time, it also closely connected with temperature, illumination, humidity and other environment in the growth cycle; the evaluation of the quality of Paris polyphylla should build standard colour spectra and fingerprint, and combine the changes of contents of main index components, thus, the quality of Paris polyphylla can be controlled effectively.
Research on Application of Information Technology in Vegetable Cultivation of High Yield and Quality
Authors: Chen Hui , Yang Xin Li
Published: May 2014

The information technology which is applied in the vegetable cultivation of high yield and quality is called the agricultural expert system. Aiming at developing a agricultural expert system, this paper discusses the research status of agricultural expert system (AES) and its software test tool, and outlines the application of Multi-Agent theory and technology. To address the problems existing in the current AES software development, this paper puts forward the research idea of Multi-Agent-based AES software test tool to inspect its standardization, fault tolerance and logic error, while provides relative technical practices. This paper also introduces the design, development and function of AES software test tool as well as application of Agent technology, and further discusses the advantages of developing the tool by utilizing Multi-Agent technology.
Efficient Expression and Purification of Bombina maxima Trefoil Factors 2 Variant in Escherichia coli as Fusion Protein
Authors: Sun Tong Yi
Published: May 2014

Bm-TFF2 was isolated from Bombina maxima. The B.maxima Trefoil factors 2 Variant (vBm-TFF2) could be developed as a novel administered wound healing agent. The challenge is its preparation from refolding insoluble protein expressed in Escherichia coli. A recombinant vBm-TFF2 was overexpressed in E. coli cells as a fusion protein with bacterial N-utilizing substance A (NusA). The fusion protein NusA-Bm-TFF2 can promote the wound healing.
A Calibrator Design for Thermometer Based on Precision Thermal Resistance
Authors: Liu Wei , Li Jing
Published: May 2014

This paper describes calibration principle of the thermal resistance based thermometer, and put forward digital thermometer calibration scheme of thermal resistance. Besides, according to the detailed analysis of the factors affected the accuracy of calibration, this paper supply a measure to solve this problem. This calibration design described in the article can achieve high-precise, digital calibration of the thermal resistance thermometer.
Analysis on the Error of Fire Control Measuring Equipment of a Certain Type of Aircraft
Authors: Ge Xing Guo , Ji Yi Guo , Tian Chun Yan , Zhang Yan Chen , Zhang Wei Dong
Published: May 2014

The fire control measuring equipment are the most important devices when the aircraft attacks, so its precision directly affects the final outcome. In this paper, the tracking and measuring errors of measuring equipment of fire control calculator of a certain type of aircraft are studied, the error sources in the process of aircraft tracking and attacking are analyzed and simulated, the influences of each errors sources on tracking and attacking error are discussed, and some advises for reducing errors are given
Application of PID Controller for Servo Motors
Authors: Shi Jun , Wu Hua Jie
Published: May 2014

Parameter optimization of PID controller design, parameter optimization method is proposed based on quantum genetic algorithm for PID controller tuning problem. Quantum Genetic Algorithm (QGA) DC servo motor control system PID parameter optimization control, quantum genetic algorithm to optimize the results of the genetic algorithm, the simulation results show that the QGA to optimize control get PID controller comprehensive performance is better than general genetic algorithm optimization PID controller, and the realization of the algorithm does not depend on the controlled object, so that the control system has better robustness and stability, with a wide range of practical in engineering practice play a good role in the control.
Ecological Modeling and Humanized Design of CRH2 Type EMU
Authors: Jin Xu Dong , Ma Jun , Zhang Yong Zhi
Published: May 2014

This paper mainly elaborated the design concept of the humanized modern interior of EMU through the analysis of the ecological design of modern EMU. CRH2 type EMU was taken for example to discusses the important principles of ecological design from aspects of environment factors, modern humane ecological design, design methods and material technology. The requirement of recycling can be satisfied by the organic combination of the design concept of EMU, the overall layout, the decoration materials, the functional requirements and the manufacturing technology.
Study of Pressure Compensation Variable Clearance Seal Hydraulic Cylinder
Authors: Fu Shu Guang , Deng Ji Xian , Lu Shao Wei
Published: May 2014

Aimed at the characteristic that the leakage of constant clearance seal hydraulic cylinder increases with the pressure escalating, the paper proposed a kind of pressure compensation variable clearance seal hydraulic cylinder based on the metal elastic-plastic theory and the study of clearance seal. The paper analyzed the deformation mechanism and deduced the calculation formula of the deformation. It also had a simulation study of the deformation of the piston lip. By experiment, it gained the variation law of the leakage changing with the pressure changing. Test results showed that, the deformation of the piston can effectively decrease the leakage of the clearance.
The Research Based on Fuzzy Sliding Mode Control for Linear Double Inverted Pendulum
Authors: Ding Li , Qiu Shu Bo
Published: May 2014

This paper involves a linear double inverted pendulum system whose the state space model is established by Lagrange function. In order to solve the chattering problem of the conventional quasi-sliding mode variable structure control, this linear double inverted pendulum system applies the fuzzy control theory to adjust the parameterwhich is in the sliding mode variable structure control law. Then the fuzzy theory is utilized to design the sliding mode and deduce the fuzzy sliding mode reaching law. The significance of this method is that it diffuses the control signal, reduces or avoids the chattering phenomenon of sliding mode control. For the most, the simulation results show that the linear double inverted pendulum system based on fuzzy sliding mode variable structure control not only retains the strong robustness of sliding mode variable structure control, but also improves the dynamic quality of the system and weakens the buffeting of the system. Thus the method is proved to have certain research.
Analysis of Anti-Riot Helmet Material Based on Numerical Simulation
Authors: Zhuang Hong Wei , Xiang De Hai , Zhao Fa Dong
Published: May 2014

Focusing on the problem that the modern anti-riot helmet has been revealed a number of deficiencies such as poor performance under impact, the material of helmet shell is analyzed based on numerical simulation in this paper. A finite element model of anti-riot helmet and simple finite element models of head, trunk and blunt object are established by CAD software and ABAQUS software. PP, PC and ABS are chosen as three different engineering plastics for anti-riot helmet shell material, and then carry a numerically simulation on the process of anti-riot helmet impact moment. Results show that the overall system kinetic energy curves present overall downward trends firstly, then present irregular waves with smaller ups and downs. PC is a more excellent helmet material while comparing to PP and ABS.
Development and Application of the Driving Componnts for 51 Series MCU under MCGS Platform
Authors: Zhang Li Jian , Liu Shan Yong , Zhang Jin Lan
Published: May 2014

MCGS could provide most drivers for any commonly used peripherals and it also need users to develop drive components based on their own demands because of the variety of its equipment.In order to meet the monitoring requirements of general users, this paper chooses the 51 series microcontroller general script driver which has widely used in system development. This paper designs the motor control and shaft temperature detection application system using MCGS and 51 single chip microcomputer, and this system get the satisfactory result of monitoring in the industry. Based on this, the script driver with validity and generality.
Research on the Fuel Consumption Optimization of Multi-Satellites Formation Establishment
Authors: Shi Jian Wei , Liu Jun Liang
Published: May 2014

In view of the multi-satellite formation establishment, the fuel consumption was optimized based on the Niche Genetic Algorithm. Some conclusions were drawn.
A New Approach for Calibration of Sinusoidal Encoder Signals
Authors: Zhang Jian , Gong Li Nong
Published: May 2014

Against to the multi-roots problem existed in Heydemann method for calibration of sinusoidal signals, a new approach containing two procedures is proposed. Firstly, the dc offsets and amplitude deviations of sinusodial signals were estimated by two observers separately. Then, to accept the non-orthogonal phase shift in the sinusodial signals, a simple Heydemann method with only two variables was adopted. Simulation results show that this method is feasible, and can converge to the origin with high accuracy. This method will show great values in the field of calibration of sinusoidal encoder signals.
An Index Based on the Method of Inertial Parameters Parts
Authors: Sun Ning , Ma Ying Jie , Liu Sheng Jun
Published: May 2014

Since the information contained in the three-dimensional model is very rich, involving many factors shape contour, texture, color, texture and other graphic images, as well as traditional as it will no longer rely on text-based entry staff image search technology text description. Therefore, the direct retrieval of the three-dimensional model is very complex, so this paper proposes a centroid as the origin of coordinates to strike inertial parameters of mechanical parts as the retrieval feature vector, to establish parameters for the index of the element of inertia characteristics of the table, enabling the retrieval development of the system.
Analysis and Application of Plane Visual Aesthetics Elements Design Based on Computer-Aided Technology
Authors: Wang Xiao Ling
Published: May 2014

Order is the embodiment of graphic design. Good graphic design works consciously or unconsciously follow some law of order, such as symmetry and golden section. In the graphic design, these rules reflect the basic principle of design in geometry, using these basic principles can make the design works more visually harmony and symmetry and balance. Therefore, an important aspect to evaluate the works of graphic design is good or bad is investigated for the design elements of products between proportion and structure. In view of the current graphic design software can not design to users in the composition theory provides support for the status quo. This paper designs an analysis system aided graphic design of visual aesthetics based on computer design geometry, realizing the import, designing elements of graphic design work of interactive segmentation and obtaining proportion and composition analysis to determine the relationship. The basic functions of the system can be used for visual aesthetics evaluation design work, can also provide support design related geometrical aesthetic principle in graphic design user.
Research on L-PPM Modulation Rate of Pulse Fiber Lasers
Authors: Hao Zi Qiang , Li Hong Zuo , Ren Xin
Published: May 2014

Compared with continuous laser, pulsed fiber laser has the advantages of high peak power, which is widely used in device processing, military defense and other areas. As the repetition frequency of pulsed fiber laser is low and therefore it cannot realize high rate transmission, this paper does the research on L-PPM modulation of pulsed fiber laser to find a method of effectively improving the modulation rate of pulsed fiber laser. Experimental results show that the L-PPM modulation can improve the transmission rate of the pulsed fiber laser whose repetition frequency is 200K to 1.387Mbps. The research results are useful for the application of pulsed fiber laser in communication.
Application and Research of Weighted Network Node Load Evaluation Method Based on Network Contribution Degree
Authors: Zhang Yun Peng
Published: May 2014

At present, most of research on node importance evaluation is concentrated on static un-weighted network. For weighted networks, this paper presented a new evalution method of node importance based on load flow in the node-weighted network, and it was based on the contribution of the nodes for the whole network in the view of microscopic and macroscopic. The most important node was the one which was determined by the outputing load, inputing load and crossing load between the different nodes. The improved evaluation method could help exactly to find some critical nodes which ware sensitive to the efficiency of networks. Final, example verifies its efficiency and feasibility.
Improving Westwood over Bandwidth Instability
Authors: Wang Ming Kun , Zhang Wei
Published: May 2014

The design of TCP/IP is the key of the success of Internet. Due to the network considered as a “black box”, the congestion control algorithm becomes the most important part of TCP. TCP Westwood provides an eligible rate estimation algorithm that improves upon the performance of TCP Reno in wired as well as wireless networks. The improvement is most significant in wireless networks with lossy links. In mobile communication, due to the node mobility, the bandwidth shifting requires higher demands to QoS. In mobile networks with high bandwidth, such as 3G/LTE, the bandwidth will shift rapidly in different positions. We call this bandwidth instability, which is the cause of the degradation of performance. However, Westwood TCP or the other popular TCP cannot response quickly to this situation. In this paper, we verify the problem mentioned above of varied TCP protocols. After that, we propose an improved fast recovery mechanism based on Westwood TCP. The new mechanism can adjust the congestion window in time when the bandwidth shifts.
Performance Evaluation of Transport Protocol in Data Distribution Service Middleware
Authors: Li Peng Wei , Zhao Hong Li , Yang Hai Tao , Sun Shu
Published: May 2014

The DDS middleware provides powerful support for data dissemination in the distributed real-time and embedded (DRE) systems, and supports multiple transport protocol (e.g. TCP, UDP and Multicast) that affect the end-to-end quality of service (QoS) properties (e.g. latency, jitter and reliability).In order to evaluate the performance of the transport protocol and then evaluate the affection on the DDS middleware QoS, this paper first briefly compares the common DDS implementations, and then presents performance evaluation and analysis of the transport protocol in OpenDDS with different environment configurations, at last presents the conclusion.
Research on Network Security and Identity Authentication
Authors: Fan Yi Xing , Zhang Ren Bing
Published: May 2014

With the rapid development of computer networks and the popularity of network applications, network security has been people's increasing attention. Network security is an important issue under Network environment, authentication technology plays a very important role for network application security. Through the study of reason perish analysis and system design, providing efficient and practical solutions for network security applications system. The purpose of this paper is to research on authentication mechanisms and authentication protocols, analysis characteristics and application environments of the network authentication system, develop the VIKEY online dynamic two-factor password authentication system.
Research on the Application of Network Language in Information Technology Time
Authors: Li Hong Hui
Published: May 2014

This thesis adopts Conceptual Metaphor Theory and Conceptual Blending Theory as its theoretical background and investigates the multiple dimensions of Netspeak on BBS using a qualitative analysis. The thesis also adopts Conceptual Blending Theory to analyze dynamic online meaning construction and cognitive mechanism of Netspeak on BBS, attempting to reveal the similarities and differences between the two language variants and promote the public's understanding of Netspeak formation. This thesis examines Netspeak on BBS from different dimensions, which is conductive to calling more attention to Netspeak on BBS, a most active language variant. Meanwhile, it enriches ontological study on language and enhances people's understanding of Netspeak on BBS, thus helping people to carry out network communication more efficiently. It also helps with English and Chinese language teaching by dealing with diverse linguistic facts in Netspeak. As an emerging language variant, Netspeak on BBS is in its initial stage and its relevant issues are worthy of further study.
Study on Level-of-Detail for Behavior of Real-Time Virtual Environments
Authors: Nie Yong Dan , Zhang Yan , Liu Xian Mei
Published: May 2014

This article based on the level of details (LOD) technology of current geometry layer research, introduced the thinking of technology into the behavior layer of virtual environment characters rendering, as the basis from the important level of the characters and the characters of their location, used different levels of details on the rendering of characters, made a balance between characters rendering time and characters facility and reduced the rendering time of large-scale virtual scene, made an increase the number of virtual scene characters with new methods.
Research the Effect of Forced Flow on Dendritic Growth with Adaptive Finite Element Method
Authors: Zhu Chang Sheng , Lei Peng , Xiao Rong Zhen
Published: May 2014

Phase field model coupled with flow field is solved by the adaptive finite element method. The simulation results show that the forced flow can induce side-branches though there is no thermal noise. When the flow velocity is low, the symmetry of dendrite morphology is slightly influenced by forced flow. With the increase of flow velocity, the symmetry of dendrite morphology is collapsed completely.
Tourism Planning and Design of the Proposed System of Computer Software
Authors: Hu Hua
Published: May 2014

Abstract. For the present time being, tourist industry is thriving on fire and compute application software has been more and more widely used in tourist trade. However ,there is not yet such an application software as to offer advice to tourists, employees of travel agencies and senior managers. For that purpose, the author designs an application software for traveling tips. This paper focuses on several basic functions of the software and outlines the background of the research and its significance and describes the objective，the major functions , the overall design , the function module and the implementation technology of this software.
The Ontology Definition Metamodel for Search Engine Based on Contextual Concept
Authors: Diao Li Juan , Gu Jun Zhong , Chun Liang
Published: May 2014

Ontology definition metamodel has been widely adopted in aspect of building ontology. However existing ontology metamodel is only suitable for building ontology in a certain domain. With collaboration and sharing among multiple domains, we face the seriously problem that is how to overcome semantic interoperability. For this problem, we need to combine general ontology with domain ontology and merge all existing ontologies by ontology metamodel. In this paper, we define main components of ontology metamodel and present conditional context and contextual concept unit. In addition, we introduce the method of mapping between conditional context and contextual concept unit. Finally, we use an example about information retrieval to illustrate its function and analysis its feasibility.
The Key Role of GBAS in the Implementation of PBN Procedures
Authors: Zhu Dai Wu , Wang Qiu Shi , Zeng Jing Han
Published: May 2014

With fast development of PBN flight procedures in our country, accuracy, integrity, alarm time, continuity and availability become more and more important for navigation source. Ground-based augmentation system (GBAS) is a satellite-based navigation technology and it is also an integrated system which is composed of ground equipment, air equipment, airborne equipment. In this paper, we firstly apply GBAS to increase the position accuracy of navigation system. The experiment shows GBAS has a lot of benefits and make a solid foundation for PBN flight procedure design.
Design of Information Management Requirement and Information Management System of Community Sports
Authors: Li Jian
Published: May 2014

Community sports informatization is the optimization of community management and community service and an important means to improve to meet the physical needs of community residents. According to current situation of community informationization development combined with the community sports construction principle, the construction of community sports information construction frame of theoretical system provides the theory support for the benign development of community sports to make full use of the community information platform. The community sports management platform provides a convenient and efficient community sports management system designed in this study for the community sports management and build a community sports exchange feature rich platform for community residents. Other street community can combine their own situation with reference to the research and design of the community sports management information system.
Research on the Agent Oriented Software Design Engineering
Authors: Wang Chun Yan , Ge Li , Liu Wen Hong
Published: May 2014

Agent oriented software engineering is a novel software paradigm that is considered as an important approach to supporting the development of complex software systems based on agent technology. Many attentions had been paid by researchers in academic; literature and practitioners in industry literature. In the past ten years, great progresses of agent oriented software engineering has been made. However, there are still a great number of problems that should be solved before it moves to industry application and its potentials should be exploited extensively. After investigating the background and characteristics of agent oriented software engineering, the paper presented the state of agent oriented software design engineering