bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Low-Carbon Buildings Materials
Authors: Lin Jie , Wu Zhao Yang , Guo Jun Xiong
Published: July 2013

The low-carbon urban construction will become the important guiding of China's urban development in the period of "12th Five-Year". With the acceleration of urbanization and surge increase of urban housing, China's construction industry will also face a new revolution. In this article, it focused on exploring the potential benefits and the development prospects of the low-carbon buildings in the future development of the construction industry, which will be taken as a reference.
Art of Fashion Design Based on New Materials
Authors: Jiang Zhong Hua
Published: July 2013

The clothing material is the material basis of the finished garment design, it not only needs to meet the clothing performance indicators, but also to adapt to the requirements of the development of human society. Costume design is the style design and also is the fabric design. Different styles should have the corresponding fabric, and the fabric is also the support of style design. This article integrated a variety of research methods, such as the comparative study of the different art forms, case analysis and measurement of research, and also uses different methodologies, such as information theory, the theory of dissipative structures, psychological theory, sociological theory, cultural theory and aesthetic theory. It is based on the three aspects of clothing materials to analyze the ways and means of the application of new materials in the art of fashion design and artistic expression.
The Application in the Movement Materials Based on the Grey Fuzzy Theory
Authors: Gao Bin , Cao Huan Nan , Jiang Hui Tao
Published: July 2013

In the sports athletes in the material, often to from a series of comprehensive evaluation index of a player, material selection process involves many factors and check each other, this kind of complex evaluation, often are fuzzy, the fuzzy mathematical for this class of problems and provide a good solution. Based on the basketball athletes' physical form primary select material as an example, the grey fuzzy theory in sports material selection of application. The experimental results show that this study proposed grey fuzzy theory for basketball player of the selected method is feasible and effective.
Analysis on the Frequency Expansion Seismic Processing Technology in TA112 Field with Vibration
Authors: Fang Shi , Zhang Xin Rong , Cao Hong Tao , Liu Li
Published: July 2013

The single layer of the sand body in TA112 field is thin, changing, and complex. Therefore, to accurately predict sand body by using seismic data, the frequency band of it is narrowed with HFE algorithm, the pre-stack data of low dominant frequency is expanded in frequency. The dominant frequency is increased from 45 Hz to 75 Hz, and the bandwidth is expanded from 10 Hz~65 Hz to 10 Hz~125 Hz. Through a comprehensive interpretation on seismic and geological data, the vertical resolution of seismic data, the vertical fitness to sand body, the fitness to the plane distributed sand body, the fitness to the evolution law of sand body are verified and checked. As a result, it is known that pre-stack frequency expansion seismic data is of clear geological significance and can better reflect the changing law of sand groups, and also it is better than the data before frequency expansion and can meet the needs of the oil field exploration and development to a certain extent.
Design of a Miniaturization Microstrip Antenna and Cavity Model Analysis
Authors: Yang Yun Xing , Zhao Hui Chang , Chen Si , Chen Yong
Published: July 2013

On the demand of miniaturization of antenna, this paper presents a circular microstrip antenna whose part of its port is sealed. Changing part of its magnetic wall into electric wall, then a decimals mode which exist between andis proposed. Elaborating the theory of reducing the resonant frequency with Bessel functions characteristics and resonance formula of circular microstrip antenna. Using the HFSS for simulation, the resonant frequency of the antenna change from 3.0 GHz to 1.2 GHz. The results prove the reliability of theory analysis. The size could be reduced nearly 60% compared with ordinary antenna. The antenna has a simple structure and can be applied to engineering application.
Three-Dimension Seismic Data Exploration Software in VR Platform
Authors: Kong Xiao Li , Wang Shu Ling , Su Xin
Published: July 2013

Though VR (Virtual Reality) technique is now applied in petroleum exploration & development, the state-owned petroleum companies have no IP (intellectual property) for such a VR system in China. Thus, it is necessary to study and develop a VR system for our petroleum companies. Based on our previous achievements in study of software and hardware technique, the concept of developing a multi-subject cooperating exploration center based on VR system is proposed in this paper. The design of interpretation software is mainly done and the further study for it is put forward.
Harmonic Detetion Algorithm Based on Identification and Simulation
Authors: Wang Yun Jian , Xie Bei Bei , Wang Pei Liang
Published: July 2013

A new harmonic detection algorithm is proposed in this paper. According to characteristics of the electric power harmonic, identified harmonic model is obtained based on Fourier series, and introduced a bounded disturbance in the model. When the parameter in the model is identified, firstly the interference value is estimated by the output error, and then the identification error is estimated and used it to update parameters of the model. By using the interference estimation and identification error estimation, the parameters convergence speed is accelerated and the identification accuracy is improved, numerical examples simulation verify this.
Study on a New Joint Source-Channel Decoder Design
Authors: Zhong Fei , Guo Shu Xu
Published: July 2013

To improve upon the Low-Density Parity-Check (LDPC) codes , incorporating compressed sensing (CS) and information redundancy, a new joint decoding algorithm frame is presented. The proposed system exploits the information redundancy by CS reconstruction during the iterative decoding process to correct decoding of LDPC codes. The simulation results show that the algorithm presented can improve system decoding performance and obviously make bit error ratio (BER) lower then traditional LDPC codes. In addition, a relatively short argument is given on different CS reconstructed algorithms in proposed system, the new design is shown to benefit from different CS reconstructed algorithms.
Controller Design for Network Control System Based on Gray Prediction
Authors: Guo Xin Lan , Li Yan Xia , Li Tao
Published: July 2013

This paper models the controlled object with varying sample period by using predicted delay as sample period based on model and proves a necessary condition for making the system stable using Lyapunov function, then obtain the real-time controller gain in every step with LMI. The three cases illustrate the correctness and validity of the proposed method.
Research on Improved Range of Passive Radio Frequency Identification Tag by Taking Advantage of Energy-Harvesting and Efficient E-Class Oscillator
Authors: Ye Gang
Published: July 2013

Using energy-harvesting technology can make the work scope of passive radio frequency identification tag to achieve the maximum .The study put forward to collecting light from the solar cell share tag antenna area, that provides the power source except from the reader receive to electromagnetic power ,which to activate the label circuit. In order to make solar cell to the influence of the tag antenna to minimum ,so optimize it with electromagnetic simulation on its position .The collected dc power could convert into the radio frequency with the efficient E-class oscillator , as well as it could flow into the radio frequency identification tag terminal with the aid of the proper designed coupled circuit .The oscillation frequency is selected on the principle of not affecting the operation of label back scattering .The presented oscillator is showed in the simulations .The E-class oscillator is used together with other forms of collection technology ,such as thermoelectric collect machine.
Unknown Input and Disturbance Output Reconstruction for a Class of Linear Systems
Authors: Yang Jun Qi , Chen Yan Tao , Wang Rui
Published: July 2013

This paper considers the problems of simultaneous unknown input and disturbance output reconstruction for linear systems. By introducing an augmented vector, an augmented system is constructed. Then, a robust sliding mode observer is proposed to not only estimate the states of the system but also reconstruct the disturbance output vector. A first-order robust exact differentiator which can be used to produce the estimates of the system output derivatives is considered. Based on the robust sliding mode observer and the estimates of the output derivatives, a kind of simultaneous unknown input and disturbance output reconstruction method is developed. Finally, a numerical simulation example is used to show the effectiveness of the proposed methods.
Counteraction of Constant Modulus Demodulation Scheme for Mixing Space Borne AIS Signals
Authors: Zhu Shou Zhong , Liu Zheng , Jiang Wen Li
Published: July 2013

Demodulation scheme was proposed in satellite systems to received Automatic Identification Systems (AIS) signals, with the potential presence of other interfering signals. The counteraction of constant modulus demodulation scheme, referred to as CCMDS, yields a set of single short signals based on the prior information of AIS after estimating the frequency, code rate and modulation index. It demodulates the corresponding short codes according to the constant modulus characters of GMSK signals. The proposed demodulation scheme is simple and easy to implement. Simulations show the satisfying performance and engineering value in demodulating the mixing AIS signals.
Study of Applying Dynamic Decision Process to Evaluation of Air Safety
Authors: Wu Yao Yao
Published: July 2013

This article is applying the Mathematician Markov's theory of Decision Process to analyse the flight data of a fleet of planes, so that summarizing and forecasting the trends of safety in an airline's organization. The article uses one airlines' fleet with only one type of aircraft, focusing on the flight data, i.e. landing acceleration factors as a study of flying safety and there occurrences at certain times. In addition, the study will detail this process and describe it through using the language of mathematics. Finally, the writer also gives the suggestions which can improve flying safety and how to use this model of Dynamic Planning
Measures for Controlling the Steel Support Welding Quality of Building
Authors: Li Sheng Bin
Published: July 2013

Along with the rapid development of the construction industry, the buildings in China will certainly change from the traditional architecture buildings to the new architecture buildings, so as to fulfill the demands of people on living or production. In order to ensure the lasting play of building functions, it is necessary for the construction units to comprehensively control the welding quality of steel supports. In this paper, the application characteristics of steel structure buildings is first analyzed, and accordingly the measures for controlling the steel support welding quality of buildings and the application of the steel support welding reinforcement technology are proposed. It is hoped that this paper can give a help to the follow-up studies.
On Edge-Balance Index Sets of a Nested Graph with Infinite Paths and Power Circles
Authors: Tian Hong Juan , Zheng Yu Ge
Published: July 2013

We generalize the concept of edge-balanced labeling to the concept of edge-balance index set of graphs. In this article, we define all class of the nested graph with infinite for the integer and investigate the edge-balance index set of a class graph. In particular, we completely determine the edge-balance index sets of the class graph for the integer and solve formula proof and graphic tectonic methods.
Study of Road Network Traffic Condition Based on Grey Comprehensive Evaluation Model
Authors: Hu Yi Chen
Published: July 2013

To compare and analyze the traffic operation status of each section and intersection in the test road network, the paper applies a combination of the analytic hierarchy process (AHP) and grey comprehensive evaluation model. Firstly obtained the evaluation indexes grey correlation matrix of contrast section (intersection) and the reference sequence according to the grey system theory, then used AHP to determine the weight of each index, finally a conclusion is carried out based on the sort of the results of comprehensive evaluation vector, which is the plunge and exit point are the worst traffic situation intersections, the section which connects the two intersections is the worst traffic condition section in the road network.
Integrated Multiple Model-Based H∞ Loop-Shaping Control
Authors: Du Jing Jing , Hu Jun Chao
Published: July 2013

H loop-shaping control is an excellent strategy, in which control performance and closed-loop stability can be both guaranteed. To use the H loop-shaping control in the multiple model framework to develop a multiple model-based H loop-shaping control method, in which local linear model selection and local controller design are integrated in the multiple model dividing procedure. Therefore, local model redundancy can be avoided and controller structure can be simplified. Besides, desired local control performance and stability are guaranteed by shaping functions. A TITO process is studied. Closed-loop simulation demonstrates the effectiveness of the proposed multiple model-based H loop-shaping method.
Social Security Research under Automation Control
Authors: Liu Fang
Published: July 2013

The development of the modern welfare state is not isolated; their welfare policy implementation depends on the advanced economy, extensive coverage, the perfect system, the diversification and welfare system mandatory. Social network analysis is just take this dependence into account, and develop corresponding method to deal with the relationship between variables. This paper, based on the p* model analysis, takes Sweden and Finland, two typical Nordic welfare state, as the examples, and finds the differences in disease disability insurance, unemployment insurance and etc. To understand these differences is of great importance to think about whether to conduct the reform of the welfare state, and how to combine the concrete national conditions with the reform.
Automation Control of Group Work Outcome Assessment
Authors: Wang Dan Dan
Published: July 2013

This paper evaluates the effectiveness of the group work based on the Cronbach α in order to know the effectiveness of the group works intervention in adolescents autogenesis by using SCCS (Self-Consistency and Congruence Scale) as a measuring tool for data collection. And SCCS can be divided into three subscales: disharmony between self-and experience, flexibility, and rigidity, and finally to get three sets of data, finding out the changes, and trying to explain and analyze them. The advantages and disadvantages of group works intervention in teenagers growing up could be found in this research.
Research on Optimal Control and Simulation for Active Suspension Systems
Authors: Qin Yong Fa , Hua Jie , Geng Long Wei
Published: July 2013

Vehicles with active suspension systems become more ride comfort and maneuverable stability, many types of active suspensions have been applied to passenger vehicles, but one of the shortcomings of an active susupension system is that the additional control power consumption is needed. The core issues of designing an active suspension system are to minimiaze vibration magnitute and control energy comsuption of the active suspension system. A new mathematic model for an active suspension system is established based on vehicle dynamics and modern control theory. An optimal control law is constructed through solving the Riccati equation, and then the transfer function is deduced to describe the relationship between the vetical velosity of the road roughness and the output of suspension system. Three typical parameters of vehicle ride comfort are researched, such as vertical acceleration of vehicle body, dynamic deflection of suspension system and dynamic deformation of tires. A case of a quarter vehicle model is studied by simulation to show that the proposed method of modeling and designing optimal controller are suitable to develop active suspension systems.
Research on Machine Translation System
Authors: Feng Xiao Wei
Published: July 2013

The paper is mainly analyzed machine translation system as effective platform using computer and this is a process that a kind of natural source language changes into another source language of natural target. Machine translation system is obviously application effect with increasing demand in today economic and social globalization. The paper is divided into two categories machine translation system, based on regulation and corpus and machine translation system and is summarized and generalized five kind of application type, which machine translation system can better serve the economic and social development.
Design and Implementation of CABAC Parallelization on Multicore DSP
Authors: Jiang Hong Xu , Zhao Wei , Zhang Xiao Hong , Lu Jin Yuan
Published: July 2013

This work mainly focus on the design and implementation of context-based adaptive binary arithmetic coding (CABAC) parallelization on multicourse digital signal processor (DSP) platform. Syntax elements partitioning based on load balancing is proposed to achieve data parallelization of CABAC. On the multicourse DSP, a task-dispatch structure is proposed. Inter-core communication is achieved by combination of shared memory and interrupt. And inter-core synchronization is achieved by combination of shared variable and hardware semaphore. The above structure makes the overall system clearer and program control easier. A speedup of 2.77 is obtained.
Vibration Analysis of Gear Drive System Based on Whole Transfer Matrix Method
Authors: Lv Feng Jun
Published: July 2013

Gear drive system is a complex rotor system through the gears, couplings and others connected. According to the vibration equation of the gear drive system, using the whole transfer matrix method, gear meshing force is analyzed and the whole transfer matrix of meshing gears is deduced. Numerical example shows that the whole transfer matrix method is applied to the vibration analysis of gear drive system has the advantages of convenient modeling, and accurate calculation.
Study on the Data Security and Privacy Protection Mechanisms of the Internet of Things
Authors: Zhao Wan Mei , Wang Rui , Zhang Xue Zheng
Published: July 2013

Internet of Things (IOT) is considered as an important part of the new generation of information technology and the problem of data security and privacy protection is a main content on the research of the information security of the IOT. It is also regarded as an important factor restricting the development of IOT. This paper presents the idea that to make an organic fusion of the technology and management to realize the data security and privacy protection of the IOT effectively by the way of combining with detailed study and understanding of advanced technical apparatus and management measures in the field of IOT research from both home and abroad, which tries to propose the perspectives and methods of building an effective integrated management model of data security and privacy protection of IOT from dual perspective of technical support and management specification.
Fast 3D City Modeling with Unmanned Airship System in Henan Province
Authors: Xie Fei Fei , Zong Jian , Wang Dong Dong
Published: July 2013

With the need of fast 3D city modeling, a new UAVS (unmanned aerial vehicle system) for low altitude aerial photogrammetry is introduced, including the platform airship, sensor system four-combined wide-angle camera and 3D modelling method. Based on the test in Henan province of China with this system, it is demonstrated that this low-altitude aerial photogrammetric system can get high resolution images with multiple views. With the vector models of the buildings and texture mapping technology, it is easy to carry out 3D city modelling. This work provides a possible for fast 3D city modelling.
Study on Traffic Prediction Algorithm Based on Multi-Scale Bi-Orthogonal Wavelet
Authors: Li Yan , Chen Yao
Published: July 2013

The traffic prediction carried out in the communication enterprises is of great significance for the optimization of the network configuration and the improvement of the communication quality. To solve the inaccurate prediction problem under the actual situation, a traffic prediction method based on the bi-orthogonal multi-scale wavelet algorithm is developed. The process of the wavelet decomposition and reconstruction are studied, and the reconstruction results for the different scales wavelet are obtained. Take a set of the special actual samples as the object, the traffic prediction for the future dates is completed, and compared with the actual results. The results show that the relative error between the proposed traffic prediction model and the actual results is less than 10%. The bi-orthogonal multi-scale wavelet algorithm has some advantages as compared with other similar ones, which will provide the important technology means for the traffic prediction forecasting and assessing in the various types of communication enterprises.
A Fast and Accurate Tag Estimation Algorithm for Dynamic Framed-Slotted ALOHA Based on M/D/1 Queue in RFID Systems
Authors: Song Hui
Published: July 2013

A novel tag estimation algorithm named DFSA-MD1 is proposed, and applied to the field of tag identification that aims at decreasing tag collision number in RFID systems. The proposed algorithm regarded the tag identification process of a frame of the dynamic frame slotted ALOHA algorithm (DFSA) as an M/D/1 queuing system. The reader can estimate tag number of next frame from success slots number and collision slot number in current frame and current frame size according to M/D/1 queuing model.The experimental results show that DFSA-MD1 algorithm requires less time consumption and lower complexity for tag identificaiton and achieves the best performance of the DFSA tags identification protocols.
Research on Malicious Behavior of Firmware Based on Hardware Resources Access Control
Authors: Yang Le Kang , Chen Di , Mei Ju , Xue Liang
Published: July 2013

As same as the traditional application and system software, firmware also faced the risk of malicious code like hobbyhorse, back door, logical bomb and so on. Firmware exhibited strong cohesion and hardware relativity, which make the malicious action in firmware to be different from that in the traditional software. This paper analyzed the specificities of firmware and the malicious behaviour about it, then expatiate the essence of the malicious behaviour of the firmware, and presented a firmware formal definition and detecting method which was based on the hardware resources access control policy. Experimental results proved that the method was effective to detect the malicious firmware.
Integrated Supervisory Control System Based on Distributed Component Management
Authors: Du Jun Wei , Fang Ya Dong
Published: July 2013

The Distributed Component management technique is a key technology to achieve millions monitor-points and determine the performance of the integrated supervisory control system (ISCS) in rail transit. A feasible technique applied to ISCS is described, which includes the distributed component architecture, component index with positioning and redundant components management. The application results show that the performance of ISCS is unaffected significantly by the number of nodes increased based on this technique. Therefore, this technique meets the millions monitor-points level monitoring performance requirements.
Distributed Wireless Acquisition System for Seismic Signal with Vibration and Noise
Authors: Li Huai Liang , Tuo Xian Guo , Liu Ming Zhe
Published: July 2013

This work presented the design and implementation of a wireless acquisition system for seismic signal. 4 distributed signal acquisition stations were integrated to the low-power prototype which composed of 48 acquisition channels, and a star-shaped wireless network was built which is suitable for seismic data transmission using the networking mode of multi-pipe and multi-address switching. A distributed seismic data acquisition system was accomplished which has the function of synchronous control and asynchronous transmission. The key technical problems and solutions of time balance distribution between multi-channel time-sharing switching acquisition and temporary storage, and wireless seismic data transmission is analyzed in detail in this paper. Thus the additional accessories of traditional wired seismograph were greatly reduced, to improve its cable layout trouble and low efficiency of construction in an adverse environment. This system increased efficiency more than 50% and took same exploration effect compared with wired mode in the field application.
Bluetooth Transmission System Based on Embedded Linux
Authors: Zhang Yin Pu
Published: July 2013

By analyzing the principles of blue tooth transmission, it turns out that the Four-Hierarchy Bluetooth Transmission System can be made by applying the embedded Linux technology. Comparison analysis showed that the data transmission between multiple Bluetooth devices is available through a system created upon the Bluez protocol and openobex protocol. Besides, this also proofed that a combination of Linux and Bluetooth can make it possible to create a fair stable data transmission system, which could be used as a reference for the application in other areas.
Acoustic Target Location Algorithm Based on Zigbee Wireless Sensor Network
Authors: Guan Jin Yu , Xu Yong Chun , Zhang Wen Ying
Published: July 2013

The intensity of the sound energy received by the wireless sensor networks using independent component analysis method to obtain the goal of energy between each other mixed proportion, and the use of sound energy model and maximum likelihood estimation method to locate the target. Experimental results show that the method has a higher positioning accuracy and noise immunity.
On the Application of Open CNC System in Real-Time Operation
Authors: Min Zhou
Published: July 2013

The unceasing progress of social science and technology,provides a chance for the rapid development of manufacturing technology,most of advanced manufacturing technology realization needs corresponding CNC technology to correspond and support.The traditional CNC system has certain closure, wont be able to meet the needs of modern manufacturing technology,so to fit for social developing demand, more and more open CNC system was developed and applied.However today's open CNC system of having open, real-time advantages,so widely used in current mechanical processing field.This paper will briefly analyze the application of open CNC system in real-time operation.
Design and Construction Analysis of Cement-Stabilized Macadam Foundation
Authors: Lin Deng
Published: July 2013

Cement-stabilized macadam has good mechanical property, but also has the advantages of plate nature, water stability and frost resistance, and it is widely used in the pavement base or sub-base course of expressway. Based on the fundamental mechanical theory of the strength and the global stability of cement stabilization macadam, this article discusses how to design the grading of the cement stabilization macadam and the influencing factors, besides, it also presents the construction control methods of the cement stabilization macadam, which is of guiding significance to the design and construction of the cement stabilization macadam.
Research on Elements of Information Conveying Based on Interface Design
Authors: Hao Ya Wei
Published: July 2013

With computer technology and network technology evolves constantly, the interaction between man and machine becomes more and more frequent, a good interface puts up a bridge to both of them. Interface design should not only convey information to users, but also should make the users enjoy it. Firstly, this paper will describe the information conveying, and then discuss the three important elements (communicators, recipient and visual effects) of information conveying in detail, finally introduce the applications of elements of information conveying in interface design. The development of information communications industry make the research on elements of information conveying based on interface design more and more important.
Research of Fault Location in Low-Voltage Distribution Networks
Authors: Zhang Yu Jun , Li Jing
Published: July 2013

The low-voltage distribution networks have some structural features, such as short supply line, more lines branch and influence of transition resistance of the short-circuit current. These characteristics seriously affect the development of fault location technology. The paper, based on the basis of the structural features about the low-voltage distribution networks, create the distribution networks of description matrix by knowledge of mathematical topology and use the distribution network fault location algorithm based on web-based structure matrix. By the algorithm, the area of fault judgment and the actual distribution network fault location are fully consistent. The new theory provides a new way of thinking for fault location in low-voltage distribution networks.
Study on Urban Environment Color Design
Authors: Yu Ling
Published: July 2013

According to the concept of computer aided design system and color matching colors based on color solid theory, color coordination guide designers great tools its realization process, and give users more than free choice. This article through the emotional color that quantitative puts forward nine tones the concept of the emotional tone. Finally, this paper summarizes the Buddha tonal coordination than process, design optimization method in a certain extent color according to the comparison of the new and old model of configuration. This method should be widely used in new cases of urban planning management, the color. Thanks to the building should be improved and color should adapt to test the feasibility of in a different environment, improve computer aided design and color of the update other areas, color design.
Processing of Mechanical Parts Based on Virtual Simulation
Authors: Wu Shuo Mei , Song Jian Wei , Fan Ya Bin
Published: July 2013

Virtual simulation is also called as the virtual reality technology or the simulation technology, namely a technology to use a virtual system for simulating another real system; the application of the virtual simulation technology to the processing of mechanical parts can play many functions. In this paper, the current main problems in the processing of mechanical parts are first summarized, and accordingly the application of the virtual simulation technology to mechanical processing is introduced in combination with the practices, and finally the processing improvement based on the simulation results are introduced. It is expected that this paper can be helpful for the follow-up studies in the future.
Numerical Simulation of the Wind Field of Assembled Steel Truss Bridge
Authors: Liu Hong Bing , He Xiao Hui , Gao Lei , Li Feng
Published: July 2013

The numerical simulation is made to the wind field of the assembled steel truss bridge by means of computational fluid mechanics. Based on N-S equation, Reynolds closure equation of "two-layer" turbulence model is regarded as the basic governing equation. Regarding numerical calculation, SIMPLE algorithm that is based on staggered mesh is adopted to the basic governing equation. The calculation of wind speed and pressure distribution of the assembled steel truss bridge provides technical support for its wind-resistant design.
Stability and Control Analysis on a Small-Scale Coaxial Helicopter with Bell-Hiller Stabilizer Bar
Authors: Zi Nie , Ming Chen
Published: July 2013

In the paper, we present a linearized mathematical model of a small scale coaxial helicopter with Bell-Hiller stabilizer bar, which is extracted from numerical linearization of a non-linear mathematical model with small perturbation theory. Stability and control derivatives calculated by numerical method are compared and analyzed for stability and control analysis on coaxial helicopters equipped with different type stabilizer bar. The study indicates that the coaxial helicopter with stabilizer bar fixed on the upper rotors has better capability on stability and control.
Applications of Research and Development of Logging in Oil-Field Visualization
Authors: Li Quan Hou , Zhang Chun Yu , Zhang Yuan Feng
Published: July 2013

The research of visualization will be carried out in the aspects of parameters distribution, dynamic history matching and geological models and numerical simulation of reservoirs respectively. In terms of the research on reservoir parameters, we can improve the accuracy of the prediction through comparing, analyzing and modeling the data of old wells and the secondary explained data. As to dynamic history matching and numerical simulation, by combination of dynamic and statistic methods, we can modify the deficiency of the traditional method. As for geological modeling, we can utilize the characters of logging responses and current mathematical theory to establish modeling. Only by combination of the dynamic and static methods, we can achieve actual visualization of oil-field development.
Pulse Design for Ultra Wideband System Based on Generalized Gaussian Pulse
Authors: Chen Si , Zhao Hui Chang , Yang Yun Xing , Chen Yong
Published: July 2013

In order to improve the detection performance of ultra wideband (UWB) system, a nonlinear scaling UWB pulse based on generalized Gaussian pulse (GGP) was proposed in this paper. Then wideband ambiguity function (WBAF) of the pulse was derived and analyzed to show the relationship between its range ambiguity function and nonlinear scaling characteristic parameters. The simulation demonstrate that such UWB pulse can achieve the thumbtack WBAF, low side lobes and high range resolution can be achieved by increasing modulation frequency offset and decreasing modulation frequency. The simulation result can provide theoretic guidance to UWB pulse design.
Numerical Simulation of Roadway Deformation of Different Cutting Aperture
Authors: Gong Xue Min , Zhang Jia Yong , Guo Li Wen
Published: July 2013

Using ANSYS finite element analysis software, the crushing effect and wall rock deformation of a small high-pressure jet impacting coal were given numerical simulation analysis. It verified that impacting increased exposed area of coal in punch, providing conditions for pressure relief of internal coal seam and gas seepage. through comprehensive analysis of the rock stress and coal displacement of different roadway models after undercutting, it was determined that aperture size was 4/15 or so of roadway floor length, thus roadway fissures developed full, and maintained rock integrity, in favor of speeding up the face driving.
Stream Turbine Vibration Fault Diagnosis
Authors: Su Hong Sheng
Published: July 2013

RBF neural networks possessed the excellent characteristics such as insensitive on the initial weights and parameters with artificial fish-swarm algorithm (AFSA) applied, which made it have abilities to get rid of the local extremum and obtain the global extremum, and called as AFSA-RBF neural networks. In this paper, a new stream turbine vibration fault diagnosis method was presented based on AFSA-RBF neural networks. After quantification and reduction of the diagnosis decision table, the simplified decision table served as the learning samples of AFSA-RBF neural network, and the well-trained neural network was then applied to diagnose stream turbine vibration faults. The diagnosis results show that the proposed method possesses higher convergence speed and diagnosis precision, and is a very effective turbine fault diagnosis method.
Online Monitoring System of Tailing Dam Seepage Line in Abominable Weather
Authors: Wei Ou Yang , Li Wen Jian
Published: July 2013

Tailings pond is a high potential energy artificial debris flow dangerous source. Once break, it will bring great harmless. Plant the seepage pressure meter in tailing dam thin section and use lightning protection and intelligence power supply unit which can adapt to extreme weather conditions. The people in site duty room can obtain the real time data, which is acquired by data acquisition unit (MCU) and transmitted by GPRS wireless. The government administration departments and enterprise leaders can also very quickly and easily watch it through the Internet. It will provide a reliable guarantee for the normal operation of the mining enterprises. This project has a innovation point of high reliability distributed intelligent power device, which can adapt to extreme weather conditions.
Quality and Safety Warning of Edible Forest Products Based on Gray Forecast Model
Authors: Zhang Peng , Liu Zhen , Ma Zhong Su
Published: July 2013

Strengthening food security early warning system is an important content of the food safety supervision. The gray model of edible forest products warning is constructed on the basis of gray prediction theory, and this article takes the pecan peroxide value in laboratory at room temperature be measured during storage as the example to do the case study. The results show that the model has higher prediction accuracy and generalization ability, and the early warning of edible forest product quality and safety is reliable.
Research of High Precision DC Constant Current Source
Authors: Su Dan , Zhang Zhi Hong , Zhao Jin Ping
Published: July 2013

In this paper, we designed a new type of high precision 1 μA constant current source after deeply studying the high precision precise dc constant current source. Compared with the traditional constant current source, in this paper we adopted complex amplifier added with floating power supply outside to design high precision dc constant current source which is for China's space use , its output current is 1 μA, resolution is 0.1 nA, accuracy is 0.5. This high precise dc constant current source is mainly used for new model rocket engine performance testing in aerospace, but also can be widely applied in different fields in need of precision measurement.
Research on Sustainable Environmental Monitoring System Based on GSM
Authors: Zhang Wei
Published: July 2013

Along with the high development of economy, the environment pollution is more serious because of the lack of Environment Control Unit (ECU) and the lag of the monitoring means. At the same time, with the fast development of mobile communication network, the remote monitoring system based on global system for mobile communication (GSM) is well applied in the environmental monitoring fields etc. which requires abroad overcast, less data transmission and dispersed monitoring points. To this question, the remote ECU based on GSM was designed and the control scheme of data-collecting system was emphasized introduced using of module TC35i and W78E516B, also the serial communication programs with Visual C++ was studied. This system is characterized by simple structure, high reliability and easy operation and will be extensive used in environmental monitoring, fire monitoring for electric power system, temperature monitoring for barn and material warehouse etc.
Estimating Runoff and Environment Protection in Tao River Basin based on Swat Model
Authors: Xu Kai , Peng Hui Qing
Published: July 2013

The Soil and Water Assessment Tool (SWAT) was used to simulate runoff yield in Tao River Basin on ArcView GIS platform. The main objective was to validate the performance of SWAT and the feasibility of this model as a simulator of runoff in a catchment. The investigation was conducted using a 6-year historical runoff record from 2001 to 2008 (2001-2004 for calibration and 2005-2008 for validation). The simulated monthly runoff matched the observed values satisfactorily, with Re was less than 20%, R2 > 0.78 and Nash-suttclife (Ens)>0.8 for both calibration and validation period at 4 hydrological stations. These indicated that the simulation of runoff was reasonable, reflecting the validity of SWAT model in Tao River Basin.
Soil Heavy Metal Pollution Analysis of City Surface Based on Neural Network
Authors: Pei Jia Pei , Tai Zhang , Shuang Shi Xiao , Yu Xia Bin , Ran Liu
Published: July 2013

Identified the urban soil has heavy metal pollution degree and the cause of the contamination of the overall analysis system. Through the mat lab software to realize pollution degree distribution visualization, use numerous evaluation pollution degree synthetic index methods, and then the reference neural network building the knowledge about the cause of the contamination analysis to determine the mechanism of the main causes of the pollution.
Non-Point Source Pollution Control Effect Based on Comprehensive Management of Small Watershed
Authors: Zhang Li Ping
Published: July 2013

The urban surface runoff pollution is the most important type of urban non-point source pollution, random, wide area complex composition. The Beijing small watershed non-point source pollution comes mainly from the release of water, livestock and aquaculture, urban sewage waters, sediment release, aquatic organisms corruption farmland tail, rural solid waste and agricultural by-products pollution. Over the years these small watershed comprehensive management, significant effects of non-point source pollution control. It's mainly from non-point source pollution characteristics, hazards, main control practices begins to explain the effect of small watershed pollution in recent years, Beijing's governance, and governance prospects.
Research Dry Crop and Irrigation Water Requirement in Environment Engineering
Authors: Wang Xin Hua , Guo Mei Hua , Liu Hui Mei
Published: July 2013

According to Kunming 1980-2010 monthly weather data and CROPWAT software and the corresponding crop data, crop water requirements and irrigation water use are calculated. By frequency analysis, irrigation water requirement was get for different guaranteed rate. The results show that: corn, potatoes, tobacco, and soybeans average crop water requirements were 390.7mm, 447.9mm, 361.8mm and 328.4mm, crop water dispersion coefficient is small, period effective rainfall during crop growth in most of the year can meet the crop water requirements, so irrigation water demand is small. While the multi-year average crop water requirements were 400.8mm, 353.5mm, 394.3mm for small spring crops of wheat, beans, rape. Because the effective rainfall for these crops during growth period is relative less, crop irrigation water requirements for small spring crop is much. Vegetables and flowers are plant around the year, so the crop water and irrigation water requirements are the largest.
Taxonomic Study on the Genus Lyophyllum in Sustainable Environment Engineering
Authors: Wang Xiao Qing , Zhou De Qun , Zhang Xiao Lei , Li Shu Hong
Published: July 2013

Lyophyllum P. Karst (1881) is characterized by siderophilous basidia and spore becoming blue in cotton blue solution, which was divided into three divided sections (Lyophyllum, Difformia, and Tephrophana) by Singer in 1986 based on color variations of gills bruised and habitat. To 2012, two hundred and thirty-nine taxa were recorded in Indexfungorum.org; nineteen taxa were reported in this genus in China. Most species of the genus Lyophyllum are very important delicious edible and medicinal fungi. For example, L. decastes and L. semitale have anti-cancer effect. In this paper, the authors dwell on some taxonomic questions of the genus Lyophyllum: (1) the characters of classification, including siderophilous granulation in the basidia and spores becoming blue in cotton blue solution, are not unique; (2) a few species that their specific taxonomic position is still unclear, furthermore, phenomenon of synonym and homonym is presented commonly; (3) the Lyophyllum is not monophyletic group. Finally, the authors put forward a natural taxonomic system need be continually studied and generated using a conjoint methods of morphological and molecular.
Design of Intelligent Green Power Management System
Authors: Du Yong Sheng , Yu Zhang Hong , Jian Yu Qing
Published: July 2013

Intelligent power management system can detect and control the electricity consumption of electrical equipment of family and office automatically, to achieve the purpose of saving energy consumption. The monitoring server is the control center of the whole system,it can real-time monitor the energy consumption data of inserting the electric apparatus,and it can also control the power on and off automatically through remote operation of the client or using strategies. The monitoring server uses embedded Linux platform based on arm architecture,software development mainly uses C Language. This paper introduces the software design of monitoring server, and also in detail describes the design of the driver and communication protocol.
Effect of Na2CO3 Addition on the Piezoelectric and Dielectric Properties of Lead-Free (Na0.5K0.5)NbO3-(Na0.5Bi0.5)TiO3 Ceramics
Authors: Wang Chun Huy
Published: July 2013

Lead free piezoelectric ceramics 0.98(Na0.5K0.5)NbO3-0.02(Na0.5Bi0.5)TiO3[abbreviated as 0.98NKN-0.02NB with the addition of 0~1.0 wt% Na2CO3have been synthesized by the conventional mixed oxide process. The effects of amount of Na2CO3-content on the electrical properties and crystalline structures were investigated. The specimens of 0.98NKN-0.02NBT ceramics added with Na2CO3maintain an orthorhombic phase. In the case of low Na2CO3content ( 0.3 wt%), the grain growth became remarkable. The increase of grain size favors improving the piezoelectric properties, which is known as grain size effect. The grain size effect compensates the decrease of the electromechanical coupling factor due to the hard doping effect. For 0.98NKN-0.02NBT ceramics by doping 0.3 wt% Na2CO3, the electromechanical coupling coefficients of the thickness modektand the planar modekpreach 0.51 and 0.33, respectively, after sintering at 1100 °C for 3 h. Moreover, the addition of excess Na2CO3is a helpful method on ceramic processing to improve the dielectric tangent loss and the mechanical quality factor. Our results show that 0.98NKN-0.02NBT with the addition of 0.3 wt% Na2CO3is a good lead-free piezoelectric ceramic.
Electrochemical Investigations on Structures of Flexible Textile Electrodes
Authors: Wang R.X. , Tao X.M. , Zhang H. , Xu Shi Jie
Published: July 2013

Different structures of new types of the flexible electrodes were fabricated from 3-dimensional stainless steel of fibres. Their electrochemical behaviour was characterized using AC impedance spectroscopy where the data presented in impedance plots exhibit different curves. Two or three layers simulation models are proposed to analysis charge transport behaviour and to elucidate dominant characteristics of the samples. The result shows that the bottom layer is more influential on ion exchange and charge transport than other layers.
A Class of Semiconducting Polymers as Potential Materials for Polymer Solar Cells
Authors: Xie Xiao Hua , Shen Wei , He Rong Xing , Li Ming
Published: July 2013

In this work, fifteen polymers have been studied to test their potential as donors for polymer solar cells by density functional theory. Those polymers contained five homopolymers based on pyridazine, [1,2,thiadiazolo [3,4-pyridazine, [1,2,oxadiazole [3,4-pyridazine, isothiazolo [3,4-pyridazine and isoxazolo [3,4-pyridazine, and ten copolymers composed of the above compounds and thiophene incorporated with 1:1 and 1:2 ratios. The fifteen polymers have been examined in terms of the abilities of absorbing sunlight, stabilities in the environment, and photovoltaic properties. The results suggest that the copolymes DTHP, DTHTP, DTHOP, DTHITP, and DTHIXP are good material candidates of polymer donor for polymer solar cells.