bluuebunny/crossref_metadata_2025 huggingface dataset:
An Approach to Slope Stability Analysis Based on Newton Interpolation
Authors: Chen Rui Wen , Cao Ping , Zhang Ke
Published: January 2015

As the mining operation of Chenmen Mountain copper mine gradually extents to a deeper stage, the stability of open pit slopes should be revaluated and new reasonable gradient is to be designed. Because of the big amount of calculation workload that should be applied to all the slopes, this paper proposed a method which is based on Newton Interpolation theory to reduce some numerous and repetitive job. Base on differential notes calculated by FLAC3D, a function precisely expressing the relation between the safety factor and slope angle was established, through which the safety factor of any slope of different gradients could be obtained directly. By comparative study of traditional methods such as the finite difference technique, it is indicated that the results from the new method that proposed in this study have a good agreement with results calculated by program FLAC3D.
Connectivity Evaluation of Water Curtain System of Underground Oil Storage Caverns
Authors: Yu Wen Sheng , Ping Yang
Published: January 2015

The connectivity of water curtain between holes must be known to ensure water seal effect of artificial water curtain system of the underground oil storage caverns. The permeability characteristics of the fractured rock mass is analysed based on packer test and validity test of the water curtain holes of the China's HuangDao’s national petroleum reserve underground water seal oil engineering, puts forward the connectivity judgment criterion of water curtain holes, and evaluate the connectivity of water curtain system of underground oil storage caverns. This criterion has been used in the connectivity evaluation of water curtain system of the HuangDao’s national petroleum reserve underground water seal oil engineering. Research provides a basis for the dynamic design of water curtain system of underground oil storage caverns, reduce project cost.
Modal Analysis of Liquid Hybrid Bearing in the Spindle System of High-Speed Roll Grinder
Authors: Meng Xiang Jie , Wu Huai Chao , Chen Shi Tao , Linghu Ke Jun , Huang Fang
Published: January 2015

Mode analysis of liquid hybrid bearing in the spindle system of high-speed roll grinder whose grinding wheel linear velocity is 80 m/s is carried out by means of finite element analysis method, and the vibration vulnerable areas of the liquid hybrid bearing are found out near the static pressure oil cavities and the diversion groove, and the former 6 orders natural frequencies are gained, furthermore, each order vibration mode is mainly presented as torsion deformation. Therefore, in order to avoid resonance vibration, the bearing should keep away from the resonance vibration frequency region in the course of practical working, and its dynamic performance can be enhanced by optimizing the structure or improving the material property of the bearing, thus, theoretical supports for developing the liquid hybrid bearing in the spindle system of high-speed roll grinder are provided.
Simulation on Entrainment Process of Suction Mouth under Negative Pressure in the Medium Dry Sanitation Trucks
Authors: E Jia Qiang , Liu Teng , Zuo Wei , Huang Yi
Published: January 2015

Since twentieth Century 40's, some foreign enterprises in developed countries began to study and produce sweeper [1-2]. Research on China's sweeping car began in twentieth Century 60 years, but until the 80 time end when china had been reforming and opening that it began to rapidly develope [3-4].But the study of mouth has the same general trend at home and abroad. Due to the different design of suction mouth, circulation type pneumatic conveying systems in general can be divided into open pneumatic conveying system using pure suction type suction mouth [5] and the use of reverse blowing type suction mouth delivery system [6]. Now most of the sweeper adopts the latter, but if the back blowing type suction mouth design improperly ,it can not achieve the ideal effect of absorbing dust, and may lead to strong fugitive dust [7-9].Today although road sweeper have been studied for decades at home and aboard, but these studies mainly is through the enterprise using engineering practice means to complete ,there are two situations occurring as follows: a number of technical on research and development need to rely on our own to explore; The engineering practice have greater demand for human, material and financial resources, and it is difficult to achieve better expected. In order to solve the problems of the above two points, according to the fluid mechanics analysis, this paper mainly research and analyze the sweeper suction mouth's flow field pickup role of entrainment process for particulate contamination by negative pressure suction, which can provide a foundation for the research and optimization of sweeper pneumatic conveying system.
CFD Simulation of Airflow Organization in the Ship Accommodation
Authors: Zhang Kun , Li Hai Xu , Wang Jin Ling
Published: January 2015

Efficient ventilation and sound air current are significant to improve indoor air quality (IAQ) and control the contamination concentration. Healthy and comfort air conditioning will provide a strong guarantee for high-performance work. While limited by lots of conditions, the airflow distribution in room is very difficult to be revealed, so numerical simulation and analysis for airflow organization become more and more important during the design stage of ventilation and air conditioning system. In the paper a ship accommodation is taken as a model to do simulation analysis on the effect of different airflow organizations. On the basis of computational fluid dynamic (CFD) theory and methodology, the temperature fields, velocity fields and air age fields under different airflow organizations are gotten by means of Airpak3.1. All these search works will be helpful for the further design and optimization for the ventilation and air conditioning system of the ship accommodation.
A Method for Designing Low Peak to Average Power Cognitive Radar Waveform
Authors: Wang Xue Mei , Wang Chun Yang , Chen Yu , Yu Yan Xin , Sun Hong Yan
Published: January 2015

In this paper, the basis function of TDCS system (Transform Domain Communication System) is used to design cognitive radar transmitter waveform. Based on the noise environment, the waveform can be adjusted adaptively. Then after clipping to reduce the PAPR (Peak to Average Power Ratio) of radar echo signal, the obtained signal is used as the next launch of the radar signal. The cognitive radar transmitter requires a nonlinear waveform to improve the efficiency of radar transmitter power amplifier, so reducing the PAPR of signal is essential. This paper presents the gray complementary sequence is applied to TDCS communication systems, and then it needs to reduce PAPR of signals by clipping. Proven, PAPR of the transmitted signal is maintained at about 3.25dB, and the signal has a low probability of intercept, high anti-interference ability and distant target detection range.
Design of SVG Application in Microgrids
Authors: Ba Duo , Feng Lei , Li Yong Quan
Published: January 2015

The active power output of micrgrids is susceptible to external influences. When the load is high, the voltage of microgrids cannot be stabilized. Voltage fluctuation may cause the fan to stop working when the voltage is lower than the operating Voltage. The problem can be solved by applying SVG to the microgrid.
Transplantation of U-Boot on NAND Flash Based on S3C2440 Processor
Authors: Zhang Peng , Peng Zhi Wei , Lv Jian Wei , Ding Zhao Yu
Published: January 2015

The main task of bootloader is to copy the kernel image to RAM , and then jump to the entrance of the kernel to run the operating system . It is the first-running code when the system is powered on . U-boot , with its open-source codes , supporting for varieties of embedded operating system kernel , high reliability and stability , has been in the mainstream of bootloader . However , it has not yet provided the original support for the S3C2440 processor , neither does its NAND flash . This paper analyzes two flashes in reference to the corresponding start-up mode , and introduces the U-boot start-up procedures briefly and figures out the major steps of transplanting U-boot to the target platform . U-boot was transplanted successfully .
Design of Multi-Route Intelligence Electric System
Authors: Wang Lin Jing , Zhang Pei Jiang
Published: January 2015

For the low management of current collective electricity, this paper designs multi-route intelligent electric system, and introduces the soft and the hardware design of the system in detail. The system uses STC enhanced SCM as the control core and communication, based on BL0932B chip, designs single phase bidirectional power electric energy metering module, and uses 485 bus and GSM module as communication and control methods. The actual application shows that the system has high intelligence, reliable operation, achieving the desired effect.
A New Index to Evaluate the Severity of Discharges Based on Energy Calculation
Authors: Lu Xin Yun
Published: January 2015

Discharges in the transformer are important symptoms to assess degration of its insulating structure. The indexes of q, φ, n and dissolved gases have been used for many years for diagnosis discharges of oil filled transformers. In this paper, one discharge experiment for needle-plate model is performed. To investigate the difference of indexes to evaluate the severity of discharges, a new energy index is proposed and all the indexes including maximum apparent discharge (Qmax), average apparent discharge (Qave), frequency of apparent discharge (Qfre), phase position of apparent discharge (Qpha), total hydrocarbon concentration (THC) and the new energy index are analysed. It is found that the best performance of all these indexes to evaluate the severity of discharges is W which rises with discharge process and increase rapidly in the end.
Research on the Mathematical Model Construction and Algorithm of Dynamic Reactive Power Optimization about Distribution Network
Authors: Zheng Kai Yuan
Published: January 2015

Dynamic reactive power optimization of power system is an important means to ensure grid economic safety. Unlike static reactive power optimization, dynamic reactive power optimization has to consider the reactive power compensation devices switches and number of constraints of transformer tap stalls. The number of constraints undermine the independence of each period, each time reactive power optimization scheduling interrelated, so dynamic reactive power optimization must be considered from the entire period of time to compensate the number of constraints of the devices, and how to deal with action number of constraints is difficulty and focus of solving dynamic reactive power optimization of the power system.
Realization of Programmable Analog Circuits with Digital Potentiometer
Authors: Zhou Gou Jun , Cheng Jin , Qi Li Jun
Published: January 2015

This paper introduced the structure and special property with type device, analyzed how to realized programmable analogue function module with digital potentiometer. This paper gave a design example of programmable second-order active low pass filter by using digital potentiometer. The programmable filter can be application to the signal filter processing of data acquisition systems. This paper has reference value of theory and practice on the application of digital potentiometer
Design of Mobile Communication Non Intersymbol Interference System Based on Calman Filter and PID Control
Authors: Huang Cui Cui , Yu Liang Jun , Sun Li Hua
Published: January 2015

In the digital baseband transmission system, the intersymbol interference is one of the main factors affecting the performance. Therefore, how to overcome its influence, making the system error rate reduction must study and solve the problems in the digital baseband system. This paper designs a new mobile communication non intersymbol interference filtering system based on MATLAB numerical simulation, the system is the integration of the Calman filter theory, and combining the genetic algorithm and PID control algorithm to achieve the rapidity and stability of the system filter. The filter design and validation simulation can be seen that the filter can effectively eliminate the measurement and observation error in the mobile communication process, to avoid the signal fluctuation caused by intersymbol interference. Through the system response curve, it can be seen that the system does not appear overshoot, fast convergence speed, and good response stability will provide the technical reference for the research of mobile communication system.
Simulation Design on Kalman Filter with Mobile and No-Intersymbol Interference System Based on MATLAB
Authors: Yu Liang Jun , Sun Li Hua , Huang Cui Cui
Published: January 2015

Intersymbol Interference (ISI) problem is one of the main factors affecting the baseband transmission performance of mobile communication’s digital signal which can not only reduce the transmission quality of the information but also can result in misinformation and false pass of information and provide troubles to the user and communications. In order to minimize the error rate, we propose a new digital equalization filter and establish the basic model of the digital filter and introduce non-linear Kalman observation equation and the state equation into the model and design partial differential mathematical model of the Kalman filter and develop MATLAB solver based on the mathematical model. In order to verify the validity and reliability of Kalman filter algorithms and mathematical procedures designed in this paper, it uses MATLAB toolbox to simulate the filter of mobile crosstalk signal and obtains amplitude-frequency characteristics and time-domain characteristics before and after filtering. By comparison, we can see that the filter can eliminate the high frequency crosstalk signal which provides technical reference for the study of the problem of crosstalk between the mobile communication codes.
Design of Voice Signal Visualization Acquisition System Based on Sound Card and MATLAB
Authors: Wei Yan Ping , Xiao Hai Liu
Published: January 2015

With the development of computer technology and information technology, voice interaction has become a necessary means of human-computer interaction, and voice signal acquisition and processing is the precondition and foundation of human-computer interaction. This paper introduces the MATLAB visualization method into voice signal acquisition system, and uses MATLAB programming method to drive sound card directly, which realizes the identification and acquisition of voice signal and designs a new voice signal visualization acquisition system. In order to optimize the system, this paper introduces the variance analysis algorithm into the design of visualization system, which realizes the optimization of voice signal recognition model with different level parameters. At the end this paper does numerical simulation on the speech signal acquisition system; through signal acquisition 2D and 3D visualization voice signals are obtained. It extracts single signal characteristics, which provides a theoretical reference for the design of signal acquisition system.
A Design of Powered Device Interface Chip under PoE System
Authors: Qi Long Fei , Ning Zhi Hua , He Le Nian
Published: January 2015

This paper proposes a design of powered device interface chip compatible with communication protocol IEEE 802.at standard, for Ethernet control of power supply. This design has all the features IEEE 802.at standard requires, including the detection, classification, under-voltage lockout and inrush current control, support of not less than 25.5W of power. The circuit of the chip is designed with Hangzhou Silan BCD process technique. Specific features of the design are 140mA inrush-current-limiting, complementary-output-enable-signal, under-voltage, overvoltage, over temperature protection, an optional external power adapter input, IEEE 802.3at type2 display signals by new electrical equipment, as well as two-event classification logic implementation.
Energy-Efficient Resource Allocation in CoMP Systems with Backhaul Capacity Constraints
Authors: Wan Qi Wen , Wen Xiang Ming , Lu Zhao Ming , Zhang Hai Jun , Zhao Jun
Published: January 2015

Energy efficient resource allocation is one of the critical issues for the coordinated multipoint (CoMP) transmission system, where the signal received by each mobile station needs to be converged among multiple base stations (BSs) in the same cluster. However, as the interaction of the system is frequent, the overhead of the backhaul signaling will be enormous. In this paper, an iterative resource allocation and scheduling algorithm (IRASA) with dual method is proposed to solve the optimization problem aiming to maximize the system energy efficiency, which considers the backhaul capacity constraints, circuit power consumption and zero forcing pre-coding (ZFP). Simulation results show that our proposed IRASA can significantly improve the energy efficiency of the system with the backhaul capacity constraints.
Potential Function for Acoustic Multipole Logging on Guided Waves in Transversely Isotropic Medium
Authors: Zhang Li , Wang G.H. , Lu J.J.
Published: January 2015

A new and effective analytical perturbation method is presented for the multipole acoustic logging in a transversely isotropic medium (TIM) whose symmetric principal axis is parallel to the borehole axis although the exact solutions could be found. In this paper, the new perturbation method is adopted to simulate the dispersion characteristic in a borehole surrounded by a TIM for the first time. The TIM is regarded as a reference unperturbed isotropic state added to the perturbations, and three perturbation quantities about moduli deviated from the isotropic medium are introduced. By selecting a group of displacement potentials and a cylindrical coordinate system oriented along the borehole axis, the zero-, first-order and second-order perturbation solutions of the multipole acoustic field are derived for the weak transversely isotropic elastic solid which has its symmetric principal axis parallel to the borehole axis. It is found that the dispersion characteristic by the perturbation method inside the borehole excited by monopole, dipole sources and quadrupole source are similar to obtained by the exact solution.
Simulation on the Temperature Properties of EAST Lower Hybrid Wave Antenna
Authors: Li Jun , Liu Fu Kun , Liu Tai Jun , Guo Cai Xia , Ying Xiang Yue
Published: January 2015

A method for building the finite element model of the lower hybrid wave antenna was proposed according to the situation of the Experimental Advanced Superconducting Tokamak (EAST) and its LHW antenna. Temperature properties of 2.45GHz lower hybrid wave antenna on EAST are investigated. The temperature distribution of antenna is performed using the finite element code. The influences of some parameters on the temperature of the antenna are studied and discussed. The simulated results lay the solid foundation for design and improvement for the lower hybrid wave antenna.
Improvements of Infrared Touch Screen Calibration Algorithm Based on Affine Transformation
Authors: Guo Wen Ming , Wang Gang
Published: January 2015

Because the affine transformation can realize the coordinate translation, rotation, scaling, it is applied to calibrate the touch screen. But,requirements for touch errors of Windows 8 is ±0.5mm,and the pass rate of sample point must reach 4%.Therefore, simply use the method of draw-point to collect the sample point has been unable to meet the requirement of accuracy. This paper tries to propose two improved calibration algorithm based on affine transform, one method use drawing lines instead of marking point, the other devides the screen into a plurality of areas to use multiple calibration. This two kind of methods can effectively improve the calibration precision.
Nine-Dimensional Eight-Order Chaotic System and its Circuit Implementation
Authors: Zhu Jian Liang , Dong Jiang , Gao Hua Qiang
Published: January 2015

The chaotic characteristics of high-dimensional chaotic system are more complex, so the design of chaotic system with higher dimension has become a leading subject of chaos theory. In this paper, we constructed a nine-dimensional eight-order chaotic system. Matlab simulation of system is performed and Lyapunov exponents are figured out, which proved more complex dynamical behaviors. And the corresponding hardware circuit is designed. Multisim simulation results of the circuit coincide with Matlab simulation of the system completely, showing the same chaotic attractors. The consistent results verified the realizability of system. Therefore, the system can provide a more secure encryption source for information encryption.
Digital Hardware Design Formal Verification Based on HOL System
Authors: Xiao Da , Zhu Yue Fei , Liu Sheng Li , Wang Dong Xia , Luo You Qiang
Published: January 2015

This article selects HOL theorem proving systems for hardware Trojan detection and gives the symbol and meaning of theorem proving systems, and then introduces the symbol table, item and the meaning of HOL theorem proving systems. In order to solve the theorem proving the application of the system in hardware Trojan detection requirements, this article analyses basic hardware Trojan detection methods which applies for theorem proving systems and introduces the implementation methods and process of theorem proving about hardware Trojan detection.
Using Artificial Neural Network to Execute Demand Response Considering Indoor Thermal Comfort and Forecast Load-Shedding
Authors: Chang Yung Chung , Lu Jyun Ting , Liu Yu Chung , Wang Chun Hong
Published: January 2015

This paper used artificial neural network to forecast the cooling load in the building in 24 hours. The unloading experiment kept the indoor thermal comfort at the ideal range of PMV=0~0.5 and PPD=5~10. Finally, dry bulb temperature, relative humidity, wet-bulb temperature and forecast cooling load were used for modeling by neural network. We can use this model to forecast how much load can be unloaded in summer peak hours accurately. This method controls the demand response for central air conditioning system, not only maintaining comfortable indoor environment, but also attaining the goals for reducing the electric expenses.
Fabrication and Characterisation of 1200V 4H-SiC VJFET
Authors: Chen Gang , Bai Song , Liu Ao , Huang Run Hua , Tao Yong Hong , Wang Lin , Li Yun , Zhao Zhi Fei
Published: January 2015

Results are presented for the silicon carbide (SiC) vertical channel junction field effect transistor (VJFET) fabricated based on in-house SiC epitaxial wafer suitable for power devices. We have demonstrated continuous improvement in blocking voltage, forward drain current under high temperature. The SiC VJFET device’s current density is 360 A/cm2 and current is 11 A at VG= 3 V and VD = 2 V, with related specific on-resistance 5.5 mΩ·cm2. The device exceeds 1200 V at gate bias VG = -10V. The current of the SiC VJFET device is 4 A and the reverse voltage is 1200V at the 200 °C high temperature.
Prediction of Mechanics Behaviors and Analysis on Dynamic Characteristics for Fiber Reinforced Metal Matrix Composites (MMC) Shafts
Authors: Sha Yun Dong , Luo Li , Jia Qiu Yue
Published: January 2015

Aiming at the question of predicting mechanics properties of long fiber reinforced metal matrix composites (MMC) shafts, two periodical arrangement of fiber, namely Square array and Hexagonal array are considered in structure,based on the Micro-mechanics Finite Element Method (FEM), six representative volume element models (RVE) are presented, calculating the Macro-mechanics properties parameters of the material. The results are compared with that of three frequently Micro-mechanics models.On the basis, taking a low pressure turbine as study object,then the results calculated of specified RVE model will be used in modal analysis of shafts with MMC,the numerical simulation method is used to calculate natural frequency, analyzing the influence of layers angles, thicknesses, sequences on modal and natural frequency.
The Speed Control Design Based on Fuzzy Logic
Authors: Gong Ting , Yan Hui
Published: January 2015

The cruise control system has the highly nonlinear and time-varying uncertainty, and it will also influenced by the outside disturbance and complex operating conditions, and it is difficult to obtain a satisfied effect by using traditional PID control. In this paper, the auto cruise control system is designed based on fuzzy PI and fuzzy PD control algorithm, and the simulated effect is also provided.
Design of Intelligent Traffic Light Control System Based on Multi CPU
Authors: Wu Wen Liang
Published: January 2015

The intelligent traffic light control is the core problem in the intelligent traffic research field, in order to solve this problem, the intelligent traffic light control system is proposed based on multi CPU. In a multi processor system, aiming at the intelligent traffic light, the reasonable control is taken. In the intelligent traffic light control system, the related principles of multi processor system design and shared memory are elaborated in detail. The BP neural network self-tuning PID control algorithm is applied in the traffic lights control process, reasonable control of traffic lights is obtained. The experiment results show that the principle is applied in the intelligent traffic light control system, it can greatly improve the control accuracy, so it can meet the actual demand of intelligent traffic management.
Based on PLC the Automatic Constant Pressure Control Water Supply System Design
Authors: Mo Xiao Ling
Published: January 2015

This article is based on PLC automatic control of variable frequency constant pressure water supply system in the application of beverage factory, the automatic water supply system of constant pressure control method and reasonable design. Analyses the composition of control system structure, working process and PLC ladder diagram control process and the touch screen man-machine interface design. The system is reliable in performance, convenient operation, high automatic degree, intuitive interface, has higher application value.
Structural and Magnetic Properties of CoFe2O4 Thin Films via Sol-Gel Method
Authors: Yang Shao Hua , Li Ding Guo , Yang Hai Bin , Yan Hong Chun
Published: January 2015

Cobalt ferrite (CoFe2O4) thin films have been prepared on Si (001) substrates, with different calcined temperatures (Tcal=400°C~800°C). The films structure was studied by X-ray diffraction (XRD) and their surface was examined by scanning electron microscopy (SEM). The magnetic properties were measured with a vibrating sample magnetometer (VSM). For low calcined temperatures, the films presented a mixture of a CoFe2O4phase, with the cubic spinel structure, and cobalt and iron antiferromagnet oxides with CoO and FeO stoichiometries. As the calcined temperature increased, the CoO and FeO relative content strongly decreased, so that for Tcal=800°Cthe films were composed mainly by polycrystalline CoFe2O4. The magnetic hysteresis cycles measured in the films were horizontally shifted due to an exchange coupling field originated by the presence of the antiferromagnetic phases.
Design of an Intelligent Lighting Control System
Authors: Yang Hai Yan , Cui Dong Xia
Published: January 2015

With the development of social, people’s requirement for the quality of life is higher and higher, for the convenience of life, people introduce more and more lighting equipment in various places, and lighting in the proportion of energy consumption is increasing. This design based on PLC to set an intelligent lighting control system, in order to achieve the purpose of saving energy.
A Study on Outdoor SVG Overheat Capacity Reduction Control Strategy
Authors: Bai Cong Yu , Wang Ying Nan , Ren Zhe , Wang Shu Han
Published: January 2015

Outdoor SVG is the SVG that is derived from conventional SVG, and can be used on sites of limited space. After repeated technical upgrading, this kind of SVG is functioning more and more stably, and is well received by clients. However, since the internal space of outdoor SVG is greatly compressed, and overheat trip still occurs in “extreme environment”. Because the “extreme environment” is just occasional, increase in number or power of fans will greatly increase equipment cost and failure points, most SVG manufacturers are not willing to adopt this strategy.
In this paper, the outdoor SVG “overheat capacity reduction” control strategy based on wireless bluetooth humidity and temperature monitoring system is proposed, which ensures that the equipment can run safely in “extreme environment”, saving labor and materials remarkably.
Application of Active Disturbance Rejection in Main Steam Temperature Control of Thermal Power Plant
Authors: Wang Dong , Zhu Rui Bo
Published: January 2015

In large-scale thermal power plants, the control of boiler main steam temperature functions as an indispensable part to improve the economic efficiency and ensure the unit’s safety. Currently, the main steam system is always characterized as a dynamic system with big delay, large inertia and huge uncertainties. Considering the characteristics above, the Active Disturbance Rejection Control (ADRC) is designed and serves as a creative solution to the problem of main steam temperature control. In this paper, a guiding temperature signal is adopted as an auxiliary feedback signal, which constitutes the cascade control loop of ADRC-PI.
Study of the Time-Delay System with Integral-Type
Authors: Wang Da Zhong , Wu Shu Jing , Akiyama Takao
Published: January 2015

Time-delay is very often encountered in various technical systems, such as chemical processes, robotics, etc. The existence of pure time lag, regardless if it is present in the control or/and the state, may cause undesirable system transient response, or even instability. This paper discusses design of the time-delay system with integral-type. With the model following control system method, we obtain a simple input control law. The proposed methodologies are illustrated herein using example of the time-delay system. In this case, new criterion is proposed to ensure that internal states are stable.
Flight Attitude Sliding Mode Control Design Based on the Compensation of Extended State Observer
Authors: Xing Hai Long , Li Juan
Published: January 2015

This paper proposes the sliding mode control design based on extended state observer control approch for the flight attitude system.The extended state observer (ESO) with new structure is used to estimate the total disturbance and to compensate the control object so that the flight attitude system can be simplified. Then a sliding mode controller is used to stabilize this simplified system. Finally, a numerical simulation shows the effectiveness of the proposed control design method.
Review the Effect of Welding Processes on the Comprehensive Mechanical Properties of Magnesium Alloy Joints
Authors: Zhang Zhi Jun , He Bo Lin , Lv Zong Min , Wei Kang
Published: January 2015

In this paper, the effect of welding processes such as friction stir welding (FSW), laser beam welding (LBW) and pulsed current gas tungsten arc welding (PCGTAW) on comprehensive mechanical properties of AZ31B magnesium alloy was reviewed. Among the three different welding processes, the LBW joints showed superior comprehensive properties to FSW and PCGTAW joints. The formation of very fine grains in weld region, higher fusion zone hardness, uniformly distributed finer precipitates were the main reasons for superior comprehensive mechanical performance of LBW joints compared to PCGTAW and FSW joints.
The Factors Impacting the Surface Quality of Machining and Modifying Measures
Authors: Peng Su Fen , Liu Tong Gen
Published: January 2015

In this paper, the machining surface quality is analyzed. The factors impacting the surface quality of machining are pointed out such as wear resistance, fatigue strength, corrosion resistance, cooperate with quality etc. Measures to improving the machining surface quality are put forward including cutting tool, work piece material, cutting condition, processing method; reduce the machining deformation of surface strengthening, and residual stress in order to apply the rule to control the machining process, finally achieve the purpose of improving surface quality and product performance. The cold work hardening of the surface layer is analyzed. It will be certain guidance for engineering practice.
Design and Implementation of Green Design in Architectural Design System
Authors: Xi Jing , Chu Xin Jian
Published: January 2015

In this paper, green design in modern society has many applications; green design has become a kind of fashion, people's consumption consciousness also gradually turned to green consumption. The real green design has not only the design itself, it was elevated to a kind of culture; promotion is a kind of spirit. For a nation, a community and all the field of culture and cultural phenomenon is of universal significance, is the nationality, is also the world, the real green design will never be out of date, it will develop with the development of the times, and always with people's life, and thus influence people's fife. The environmental protection, the "green building", beautiful and comfortable, it includes day lighting is ventilated, environmental pollution, noise insulation, sound insulation, traffic, beautify, etc. This is all indoor stylist people bring sensuous pleasure. The relationship between human beings and the environment is very harmonious with the environment; make the person, and style, forms, a full expression to care, An environmental atmosphere, A complete and free of personal space.
Research on Numerical Model for Earthquake Induced Progressive Collapse of High-Rise Buildings
Authors: Wang Yi Xuan , Huang Lei
Published: January 2015

Progressive collapse is defined as the collapse of the whole building due to local weak stories or weak zones. In this paper, collapse should theoretically be avoided for any building under any earthquake, it is necessary to study the collapse behavior of buildings to acquire a better understanding of the collapse mechanism and to find efficient methods to prevent it. The collapse process highly depends on the feature of the whole structural system, so numerical simulation becomes a major method to study it. Based on the finite element method, by selecting the appropriate cell death and cell contact algorithm criterion can better simulate the structure collapsed in an earthquake under the continuity of the whole process of destruction, to help understand the causes and mechanism of structural damage. The real buildings are analyzed to study the failure mechanism of the structure. The models proposed are reasonable to study the seismic collapse mechanism of high-rise buildings.
The Exploration of the Design Principle of the Railway Station Square
Authors: Zhao Jing
Published: January 2015

Railway station square is integrated planning designed, then we need to consider multiple relation factors in the designing. The different activities’ manners all need to make consideration. The premise of design is smooth square crowd scattered, safe traffic and comfort square environment. And as one part of urban spatial environment, the square should be designed as the image of city gateway. This paper makes exploration of railway square design from every aspect.
Effect of Ferulic Acid and its Oxide on Qualities of Soy Protein-Isolate/Chitosan Composite Films
Authors: Zhang Chao , Guo Xiao Fei , Ma Yue , Zhao Xiao Yan
Published: January 2015

The effect of ferulic acid (FA) and oxidized ferulic acid (OFA) on performances of the soybean protein-isolate/chitosan composite films was evaluated. The FA and OFA showed an excellent compatibility and miscibility of in the composite films, and leaded the surface more compact and smooth. The FA and OFA also enhanced the thermal stability of the composite films. The FA and OFA enhanced the performance of the composite films by raising the band energy of the crosslinked molecules.
Pressure Distribution of Pressure and Non-Pressure Sections of a Hydropower Station Spillway Tunnel
Authors: Zhang Hong Qing , Tan Wei Kai , Lou Yi Long , Zhao Qian
Published: January 2015

In this paper, we used VOF combining turbulent model to simulate pressure distribution of pressure section and non-pressure section in a hydropower station spillway tunnel with high head and large discharge in China. The results show that in the pressure section of the spillway tunnel, the values of pressure of emergency gate slot, working gate and the pressing slope, getting from physical model experiment and numerical simulation, are all positive. While in the non-pressure section, the No.1、2、3 aerators of the sudden enlargement and sudden drop occur the maximum pressure. And at the back of the No.1、2、3 aerators, where the values of pressure are negative, forms cavity. The conclusions obtained can improve the design of spillway tunnel.
Study on the Information System of Tunnel Stability in Arching Process of Surrounding Rock
Authors: Liang Xiao Dan
Published: January 2015

It studied the early stability model of tunnels and establish the computer information system of early stability by using general software of ANSYS and Matlab in the paper. Firstly,the stress is displayed successfully through the model of stress intensity checking and algorithm. Then,it analyzed the influence of stress on surrounding rock in the arching process by using ANSYS software to calculate stress distribution in surrounding rock.Finally,it obtained the visualization display by using Matlab. Due to the limited conditions of computer, the numerical modeling process can not simulate the real situation of surrounding rock,we can only use approximate models to replace the whole rock system.
Preliminary Exploration on Landscape Planning around Lake Zone in the City
Authors: Yang Hong Gang , Huang Cong , Wang Ying , Wang Fei Yu , Sun Hong Li , Huang Yong Bing
Published: January 2015

Urban lakes are an important part of water environment, not only providing a place for people to entertain, but also one of the higher value services ecosystem. With the accelerating pace of urbanization in China, the development and utilization of resources increasingly strengthened urban lakes, thus sustainably creating lakes landscape is extremely urgent. In this paper, by taking NiuShan Technology Eco-City as a case study, ecological, geographical, social, functional and economic principles are proposed. From a landscape, environmental and ecological perspective, and according to the order of terrestrial water landscape among other aspects, it primarily explores landscape planning around lake zones in the city.
Research on the Application of Energy Saving Technology in Building Operations
Authors: Zhang Yan Ge , He Xiao Hang
Published: January 2015

Under the framework of "Kyoto Protocol", CDM mechanisms and the formation of carbon financial markets supply a platform for developing countries to participate in the global greenhouse gas emission reduction activities. PCDM projects will be the inevitable choice in the area of energy-saving construction. This paper analyzes the CDM mechanism and the applied limitations of CDM in the field of energy-saving residential building and then it points out the potential of PCDM in Chinese energy-saving construction and finally puts forward suggestions for promoting the residential building PCDM projects
Research on Green Public Building Construction Industry
Authors: Liu Qing
Published: January 2015

The promotion and implementation of green public building make important significance for constructing resource saving and environment friendly society in China. The paper analyzes the connotation of value engineering and green public building, demonstrates the necessity of the theory of value engineering application in green public building investment in the decision-making, and the application process are analyzed, especially adopts the environmental benefit , personal benefits and social efficacy as objective function of green public building. The Analytic Hierarchy Process and fussy evaluation are used to quantify the function indexes. Finally investment decisions of green public building are proposed based on value engineering.
Research on Decoration Engineering Design and its Application Based on Value Chain Analysis
Authors: Yu Xiao Na , Wang Yao , He Xiang Shuo
Published: January 2015

Decoration engineering as an important force in building industry, it has been plagued by low levels of technology management, engineering and serious waste problem over years, how to optimize the process to achieve value added decoration has become an urgent problem. This paper describes the current status and value chain theory of decoration industry, analyzes the constituent elements of the value chain, establishes decorative optimization index systems based on the value chain method, and finally a case verified the validity of it.
Effects of Cnoidal Wave-Induced Seepage on Vertical Breakwater Resting on Permeable Elastic Seabed
Authors: Yang Jian Kang , Huang Hua , Guo Lin , Lin Jing Rong , Zhu Qing Yong , Zhan Jie Min
Published: January 2015

Theoretical investigations on cnoidal waves interacting with breakwater resting on permeable elastic seabed are presented in this paper. Based on the shallow water reflected wave theory and Biot consolidation theory on wave-induced seepage pressure, the analytical solutions to first order cnoidal wave reflection and wave-induced seepage pressure are obtained by the eigenfunction expansion approach. Numerical results are presented to show the effects of depth of water, breakwater geometry on cnoidal wave-induced seepage uplift force and overturning moment. Compared with Airy wave theory, in certain shallow water conditions, the shallow water wave theory can more effectively illustrate wave nonlinearity effect in wave load prediction.
Causations and Properties of Gate Pier Cracks of Concrete Dam in Northern Cold Region
Authors: Zhou Li Yan , Liu Cheng Dong , Zhou Xing Guo , Yan Jing
Published: January 2015

The dam crack is a crucial factor in the safety running of a dam. It turns out that Shenwo Reservoir dam has plenty of gate piers with multiple penetrative cracks through our on-site inspection, which threatens the safety of the dam greatly. The causations of the gate pier cracks of concrete dam were investigated using three-dimensional finite element method (FEM). Possible causations to induce cracks were considered and a sensitive analysis was studied on temperature drop. The result shows that serious dam cracks are not possible to appear if the gate pier is under normal structural loadings, while the drop temperature and ice bulge from seepage water are the main reasons in northern cold region for concrete dam to have cracks.
The Application of Building Information Model in the Design of Precast Concrete Structures
Authors: Guo Er Wei , Qian Ying Xin , Li Chen Guang
Published: January 2015

Advantages of precast concrete structures were very obvious, these were the sign of industrialized construction, while also reducing costs, energy conservation, and improve quality. In recent years, the demand of precast concrete buildings was also increasing. BIM technology was advanced technology, the design of precast structures, such as the frame shear wall structure, was given by using BIM technology in the complete process; Design process and value of the application of the BIM technology in the prefabricated structure were analyzed, Prospects of the BIM technology using in prefabricated structures were discussed.
The Application of Building Information Model in the Deepen Design of Prestressed Concrete Structures
Authors: Guo Er Wei , Qian Ying Xin , Xu Gang , Gao Jin Dong , Li Chen Guang
Published: January 2015

Currently deepen design of prestressed concrete structure exists various problems, them can be solved using BIM building digital technology in the deepen design phase of prestressed concrete structures, such as constant correction of the two-dimensional drawings. BIM technology was advanced technology, the design of prestressed concrete structures, was given by using BIM technology in the complete process; Design process and value of the application of the BIM technology in the prestressed concrete structure were analyzed, Prospects of the BIM technology using in prestressed concrete were discussed.
Study on Anti-Skid Performance Degradation of Coating-Type Color Anti-Skid Pavement
Authors: Liu Feng , Sun Jie
Published: January 2015

This study starts with analysis of interaction mechanism of tire and pavement to analyze the factors influencing anti-skid performance in pavement surface characteristics and confirm pavement characteristics related to anti-slide performance. Besides, this paper further analyzes the effect of surface coating on pavement anti-skid performance. The specific experimental study mainly concentrates on raw material selection and evaluation and the study on the performance of different particle anti-skid pavements. This paper also measures friction coefficient of anti-skid section of the extension line of Beiyuan Avenue within the use for one and a half years. The degradation model is set up to evaluate pavement performance degradation. Further, this paper estimates Jinan the service life of the experimental section of coating-type color anti-skid pavement and carries out benefit analysis and development prospect.
The Application of Superiority Evaluation Method in Bid Evaluation of Architectural Engineering Construction
Authors: Liu Jun E , Bi Ming Jie
Published: January 2015

In order to solve the incompatible problems between each evaluation index when evaluated,the superiority evaluation method was applied in the process of Bid Evaluation of architectural engineering. Using the CRITIC method to determine the weight coefficient of each index , which take into account both the contrast intensity between the indexes and introduces the correlation between indicators to determine the weight coefficient, so that more objective. Calculating the bidders value of superiority degree and maximal is selected as the most suitable bidder, results show that the method is relatively objective evaluation, the calculation is simple and practical.
A Review of Numerical Study of Micro-Scale Modeling for Asphalt Mixture
Authors: Li Dong Feng , Zhang Jian Tong
Published: January 2015

Combining with digital image processing and numerical simulation technology, X-ray computerized tomography (CT) was used to study the microstructure of asphalt mixture for analyzing internal structure of asphalt mixture. The microstructure modeling methods of asphalt mixture can be classified as continuum-based numerical method and discontinuum-based numerical method. This paper described a review of the work done by many researchers on the modeling of asphalt mixture. The simulation methods are included finite element network model (FENM), a micromechanical finite element model (FEM), a clustered discrete element model (DEM), disturbed state concept (DSC), DDA (Discontinuous Displacement Analysis), numerical manifold method (NMM) and meshfree manifold method (MMM) that were used in micromechanical modeling of asphalt mixture.
Study on the Durability of Air Entrained Concrete after Long-Term Soaking in Multi-Salt Solution
Authors: Su Xiao Ping , Wang Ting Ting
Published: January 2015

The concrete structures have been long-term corroded by soluble salts in the salinized soil, which was simulated by the way of concrete being soaked in multiple salts solution, then the failure law and mechanism of concrete was studied in this paper. The results show that salt crystallization happens on the exposed parts of concrete, the quality loss rate of concrete takes on the reduction-growth trend and the relative dynamic elastic modulus takes on the reduction-growth trend, the salt corrosion resistance of air entrained concrete is better than that of non-air-entrained concrete after long-term soaking in multiple salts solution. The failure mechanism of concrete is the result of interaction between the physical damage of salts crystallization and chemical erosion, but the former is much easier to implement than the latter.