bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Wireless Network Security Based on 4-Way Handshake Protocol
Authors: Su Di Xin , Xue Zhi , Shi Yong
Published: August 2014

With the growing popularity of network, more and more people use embedded portable devices to carry out e-commerce by wireless network. However, the security of wireless network is increasingly grim. According to the WPA/WPA2, this paper focuses on authentication issues between access point AP and wireless client STA in the wireless network security, and presents an improved protocol to resolve these problems. The improved one based on 4-way handshake protocol can resist dictionary attack, DOS attack and phishing attack. In the End, the paper analyzes the protocol.
Technical Research of Composite Blockage Remover Technology in Dongrengou Oil Region of Dingbian Oilfield
Authors: He Ya Wei
Published: August 2014

On the basis of the analysis of geological features and the study of reservoir substance in the Dongrengou oil region, we conclude the major reasons for oil congestion in this region, including the downhole damage caused by the organic and inorganic sediment. All these damages have been caused in different operations of oil production, including the water injection operation, fracturing operation and other stimulating operations. To better solve this problem, we propose the solution of using chlorine dioxide to dissolve the congestion. Through the formula of the laboratory experiment, we finally put forward the proper composite acid formula to break down the congestion in this region and work out the scientific, reasonable construal technology.
The Design of TTCAN Bus Network Node Based on Embedded Operating System VxWorks
Authors: Zhang Jian Wei , Tian Xing Ke , Zhang Peng , Wang Wei
Published: August 2014

The TTCAN network protocols have been achieved based on the MPC5121e microprocessor in embedded real-time operating system VxWorks. The optimal solution is calling the callback function of the interrupt service routine to complete the CAN network data transmission and using the auxiliary clock to calculate the local time offset.
The Output Power of the PV Power Plant Modeling Based on ANFIS
Authors: Liu Ling , Tang Bao Guo , Sun Kai
Published: August 2014

To find an effective and reasonable method for calculating precisely the output power of the PV power plant, adaptive neuro-fuzzy inference system (ANFIS) based on Takagi-Sugeno (TS) is proposed. Analysis of the various weather factors that affect the output power of the PV power plant, and select the appropriate input ,MATLAB as a tool ,depend on the different input variable to establish different output power of photovoltaic power plants based on the subtractive clustering the ANFIS model .Results show that all the model has a high accuracy and meet the practical engineering application requirements,by comparing models choose the optimal model.
Discussion on Key Issues of High-Resolution Panel Driver IC Design
Authors: Zhang Jin Fang , Chen Hou Jin , Fan Lei
Published: August 2014

The driver IC is a core device to achieve switching and display control function for the liquid crystal display panel, and high definition is one of the important development directions. There are special requirements in IC design, manufacturing, and downstream packaging and so on. Some key issues in the design and manufacture process, such as the high frequency input interface, the voltage conversion, data conversion, ADC and operational amplifier, low power design, EMI and ESD protection, are discussed for the high resolution panel driver IC. The trend and development in the near future are also forecasted at the end of the article.
Power Load Forecasting Using Improved Grey-Markov Method
Authors: Xu Jie , Huang Yuan Sheng
Published: August 2014

Power load forecasting is an important part of management modernization of power system. Accurate load forecasting can provide reliable guidance for grid operation and power construction planning. For load forecasting "small sample", "poor information", "uncertain", "non-linear" and other features, In this paper, GM (1.1) model was improved in the gray system theory, by constructing the background value sequence to transform the original data, using gray rolling GM (1.1) model and combining Markov prediction model to make power load forecasting. The application results show that this method is accurate and practicable.
Development of the Multi-Purpose Signal Producer which Simulated a Train Passing
Authors: Chen Wen Fang
Published: August 2014

During maintaining the breakdown of the Trace Hotbox Detection System and the Automatic Train Identification System,to solve the problem of whether good or not depending on a train passing, a multi-purpose singal producer which simulates a train passing is developed.It can produce many kinds of trigger singals and fit the velocity conditions.
Influence of Structure of Electrode Array on Logging. The Resistivity Logging Response through Casing of Structure of Electrode Array
Authors: Wang An Ling , Liu Fu Ping
Published: August 2014

Because difference of formation model affects the potential distribution on the metal casing, the resistivity logging response can be obtained through casing by measuring the potentials on the metal casing. In fact, the logging responses are the comprehension effects of complex formation and metal casing, so that in the coefficients of transmission line equation (TLE), we should consider the effects of formation model in radial-direction. In the following, for the formation taking on six-layer in axial-direction, and step in radial-direction, the resistivity logging responses through casing are researched and discussed, and given the recurrence formula to compute potential. Draw the curve of the resistivity logging response through casing of six-layer formations. The conductivity of formation is computed is very approximating to that of formation model. The computing examples also show that this method has a fast computing speed (the run time of computing example is less than 1s). For analysis the logging response of six-layers and block formations, and the design of logging instruments, the research is important significance and useful.
The Influence of Ferrite Materials to NFC Antenna
Authors: Zhao Qing , Liang Di Fei , Li Dong Yue
Published: August 2014

The electromagnetic (EM) shielding sheets,ferrite materials, ofen sandwiched between NFC (Near Field Communication) tag and metal to increase its detection distance. However, the addition of this ferrite materials could affect the NFC antenna other performance at the same tine, especially the impedance and working frequency. In this paper and investigation, we proved that ferrite materials have an abvious influence on NFC antenna impedance and working frequency via HFSS and ADS simulation. When the real part of permeability of the EM shielding sheet changed from 90 to 150, the working frequency drifited from designed working frequency 13.56 MHz to 12.87 MHz as the rapid increasing of antenna port impedance. Using Magneto-Dynamic Analysis,the corresponding explanation is given.
The Influence Factors of Biodiesel Preparation from Waste Cooking Oil via Acid Catalyst
Authors: Ren Lian Hai
Published: August 2014

The process of biodiesel made from waste cooking oil via acid catalyst was studied in order to eliminate the waste cooking oil pollution and realize the health of waste oil use. The optimum conditions of biodiesel made from waste cooking oil, effect of reaction time, alcohol-oil ratio and catalyst dosage to the biodiesel conversion were explored by using orthogonal experiment design. The results showed that the conversion of biodiesel is 95.2% under the conditions of the reaction time is 2h, the alcohol-oil ratio is 6:1, the catalyst dosage is 1.5%, and the influence factors can be arranged as follows: reaction time > catalyst dosage > alcohol-oil ratio.
Research of Diesel Engine Waste Heat Organic Rankine System
Authors: Dong Jun Qi , Zhang Xian Hui , Wang Jian Zhang , Wang Bin
Published: August 2014

Organic Rankine Cycle (ORC) is an attractive technology solution in waste heat recovery. There is about 60% energy of fuel as waste heat is discharged to atmosphere in the diesel engine. The 15kw ORC plant had been developed using the diesel engine waste heat, which including the jacket coolant and exhaust gas. The working fluid is the R245fa, the plate type heat exchangers were used as the condenser and evaporator in the ORC systems, the twine screw expander as the working machine. The performance of condenser and evaporator had been simulated and developed using the distributed parameters calculations methods according to the effective-NTU. The ORC system and engine can stable run for a long time without frequently control acting. The ORC systems can bring 15.4 kW electric energy in the stable condition. The efficiency based on the first law of thermodynamics is 7.7%; completely generating efficiency is 6.8%.
A High Effcient Brushless DC Motor Drive Technology for Solar Array
Authors: Zeng Chun Ping , Yu Li Ming , Gao Xiang , Wu Hong Xing
Published: August 2014

This paper analyzes the working principle of solar array and drive requirements and presents an efficient drive technology of brushless DC motor for solar array. The technology solves the phenomenon of step-out in stepping motor control system. Brushless DC motor mathematical model is inferred and the possibility of driving solar array by brushless DC motor are analyzed in this paper. To achieve speed feedback loop control, reversing, over-current protection function, high-efficiency motor control chip are used in the system for brushless DC motor closed-loop control. Experimental results show that the system has simple structure and it can works in the harsh environments.
The Investigation Based on Heating with Biomass Energy for Biogas Digesters Winter Gas Production Technology in Cold Regions
Authors: Wang Yan , Zhang Shan Shan
Published: August 2014

The average temperature is low in cold regions; therefore, under natural conditions, the gas production is more unlikely to be successful. When temperature drops below 6 °C in the biogas digester, it stops producing gas. By aiming household biogas digesters as subjects, from the test materials, experimental methods, experimental test results and economic analysis, this experiment studied the feasibility of heating with biomass energy for biogas digester to accomplish the digesters gas production in winter in in cold regions.
Fuzzy Comprehensive Evaluation of System Performance for Vuilleumier Cycle Heat Pump Driven by Solar, Geo-Thermal and Biomass Energy
Authors: Xie Ying Bai , Deng Xiao Dong , Zhao Jin He
Published: August 2014

Vuilleumier cycle heat pump (VM) has highest efficiency among all heat driven cycle. In this paper, solar, geo-thermal and biomass energy are investigated as input thermal energy to driven VM cycle heat pump. Fuzzy comprehensive evaluation method is applied to evaluate system performances. Initial investment of the system (IS), system reliability (RS), environmental protection of system (EP), VM exergy efficiency (EE) and VM coefficient of performance (COP) are selected as main evaluation indexes. For all the three renewable input energy, system are scored good, solar driven is better than the other two.
The Ecological Optimal Performances of an Irreversible Four-Heat-Source Refrigerator
Authors: Xu Li Ya
Published: August 2014

Using finite-time thermodynamics, optimal analysis on a class of four-heat-source refrigerator for Newton’ heat transfer law is done based on the ecological objective function. The ecological optimal performances of refrigerator are derived. An ecological optimization criterion is proposed for the best mode of operation of the refrigerators, which consists of maximizing a function representing the best compromise between the cooling rate and entropy production rate. We investigate the ecological optimization performance and derive the optimal cooling rate, coefficient of performance and entropy production rate for the refrigerators. Moreover, there are some advantages in using the ecological optimization criterion; it is especially beneficial for determining the reason able use of energy and protecting the ecological environment. The conclusions obtained here are of importance in the optimal design and reasonable use of the energy of real four-heat-source refrigerators, such as absorption refrigerators, adsorption refrigerators, and so on.
Investigation of the Technical Proposals for Cogeneration Plant in China
Authors: Li Yun , Li Yan Bin , Li Wei Guo
Published: August 2014

Cogeneration is regarded as an important approach to probe new profit increase and achieve the long term goal of sustainable development. In the present paper, cases of heating rebuilding for units with different capacities are analyzed. Additionally, four cogeneration bases on the energy cascade utilization are proposed, which makes full use of the extracted steam heat, flue gas waste heat and low pressure cylinder exhaust steam condensation heat. The proposed technical approaches for cogeneration have the merits of excavating energy saving potential in depth and achieving economic benefits to the maximum value. Under the increasingly stringent circumstances of energy conservation and emissions reduction policies, accelerating the implementation of the technical proposals for heating rebuilding of thermal power units has promising applications and benefits.
Research on High Voltage Switch Mechanical Properties Calibration Technology
Authors: Xu Zi Li , Wang Hao , Lei Min , Zhang Jun , Qi Cong , Song Wei
Published: August 2014

High voltage switch mechanical parameters include time parameters, travel parameters and velocity parameters. In this paper, a standard device is developed which use liner motor to simulate switch motion that realize time parameters, travel parameters and velocity parameters calibration. This article describes the working principle of the standard device and core technology. The calibration data verify the device performance parameters meet the design requirements.
Improvement of Edge Etcher System
Authors: Chen Wei Kun , Chen Wei Yu , Jin Li Hui
Published: August 2014

The edge etcher machine is fully automated with very dangerous chemical circumstance; the shortcoming is low capacity for production, it spends too much time on the centering process, we use vision system to reduce the time of centering process and increase the capacity of production.
Design and Simulation of Supersonic Swirling Separator
Authors: Zhang Yu Peng , Wang Shu Zhong , Jing Ze Feng , Lv Ming Ming , Luo Xiang Rong
Published: August 2014

Supersonic swirling separator has been developed for natural gas dehydration in recent years. Compared to Twister-I supersonic swirling separator, Twister-II type overcomes the disadvantage of uncontrolled shock and the steady swirling flow field contributes to high efficiency of gas-liquid separation. The design method is discussed. For the Laval nozzle, the contraction section is designed by double cubic curve method, while the method for expansion section is tapered tube method the same as the divergent tube, throat is smooth circular arc; the length of straight swirling pipe section for separation is 3-8 times of the diameter. The paper simulates the applicability of the supersonic swirling separator by Fluent. Studies have shown that the lower environmental temperature, the lower the outlet temperature, the easier water to cool, and the higher the separation efficiency. If the volume flow rate rises, the inlet velocity and the mass flow rate can be effectively improved. We can control the shock location by adjusting the pressure at the outlet of divergent pipe. The shock appears at the inlet in the working condition designed. When the outlet pressure is lower, the shock occurs in divergent tube; on the opposite, it moves forward. Beyond a certain degree, shock occurs at the Laval nozzle, the device fails to work.
Design of Simulating Control System on Fresh Water Generator
Authors: Jin Jian Guo , Wang Zong Tao
Published: August 2014

It is important for sailors to master the control principle of fresh water generator. According to the principle of fresh water generator and by the use of programmable controller technology, a simulating control system on fresh water generator was designed to meet the need of sailors training and competence assessment. The system illustrates vacuumizing, supplying sea water, heating and condensing of the fresh water generator. It helps sailors to master the basic operation of fresh water generator.
Crystallization Status of Palm Oil Biodiesel under Low Temperature Environment
Authors: Cai Ling Ling , Yuan Yin Nan , Chen Xiu , Lai Yong Bin , Qiao Xing , Chen Lei
Published: August 2014

The composition of palm methyl ester (PME) was determined and quantified by Gas chromatography-Mass spectrometer (GC-MS). Cold flow properties of PME was studied by means of cold filter plugging point tester and kinematic viscosity tester and the solution crystallization theory, at the same time to observe the crystalline mechanism with low temperature phase contrast microscope. Experimental results showed that PME was mainly composed of saturated fatty acid methyl ester (SFAME) and unsaturated fatty acid methyl ester (UFAME), PME has a poor cold flow properties because of its more SFAME content. Observation results of the microscope showed that, the crystallization of PME at a steady cooling rate was lamellar crystal for rules. With the reduction of temperature, lamellar crystal increased gradually, and aggregated together. The higher the cooling rate was, the smaller the lamellar crystal and the irregular shape was.
Finite Element Analysis of Chinese Traditional Hall-Style Timber Structure
Authors: Wan Jia , Niu Qing Fang , Qiao Guan Feng , Li Tie Ying
Published: August 2014

This paper uses general finite element software Abaqus to simulate three Chinese traditional hall-style structures recorded in the book <>. With Abaqus having an advantage in dealing with contact problems, three hall-style timber structure finite element analysis models have been established within the 3D solid element which is used to model beams, columns, brackets and other structural members in the modeling. Contact pairs also have been used to simulate the interaction between the structure members like beam-column contact pair, column-foot foundation contact pair and dougong-bracket beam contact pair and so on. In the modeling process, some simplifying assumptions have been used for many complex structural members and interactions between them being used in Chinese hall-style structure. The model was finally tested by gravity load and vertical load.
Static and Dynamic Elastic-Plastic Analysis of a Storey-Adding Structure
Authors: Zhang Yuan
Published: August 2014

With the rapid economic development of our country and the improvement of housing function requirement and the lack of land for construction, adding layer structure has become a trend in the development of construction industry. Now a lot of adding layer buildings have sprung up both at home and abroad. Adding layer structure needs to undertake seismic calculation to ensure the reliability under the earthquake effect. At present, many researchers’ studies of the adding layer structure only stay in elastic stage, and there are only very little researches about the static and dynamic elastic-plastic of the structure. Based on the literature and art center of Changzhi city as the background, it is introduced the calculation process, which adopted the EPDA& PUSH software for the static and dynamic elastic-plastic analysis of reinforced concrete structure, obtained the carrying capacity and the deformation under the rare earthquake, and analyzed the results. By comparison, the results of the static and dynamic elastic-plastic analysis are similar.
Using a Novel FCE Model to Evaluate the Industry Competitiveness of Biomass Power Generation
Authors: Liu Zhi Bin
Published: August 2014

Biomass energy is a kind of clean renewable energy, and the resources are abundant. With the rapid development in recent years, the biomass power generation has become one of the electric power new energy with the large-scale commercialization development prospects. The industry competitiveness evaluation of biomass power generation in China is the basis to explore the biomass power generation industry development strategy, which also can indicate the direction for the rapid and sound development of biomass power generation industry in China. To evaluate the industry competitiveness of biomass power generation scientifically and accurately, we defined the subordinate function and weight proportion and constructed the multi-level fuzzy comprehensive evaluation (FCE) model. The biomass competitiveness evaluation of biomass power generation showed that the results given by this model are reliable and precise.
Numerical Calculation of Photovoltaic Sunshade Component’s Shading Coefficient
Authors: Zhang Xiang , Xie Li Ying , Feng Bao Nian , Li Zhong , Hong Rui Jiang
Published: August 2014

The photovoltaic sunshade component has been widely used in BIPV for its artistic and energy conservation, In this paper, a mathematical model of photovoltaic sunshade component was established, the influence of its oblique angle, ratio of stretching out and the install height on shading coefficient was analyzed specifically. Considering the requirement of generating electricity, an engineering project was constructed as the optimum modeling parameter, eventually, a universal design parameter of photovoltaic sunshade component was obtained.
The Energy-Saving and Land-Saving Utilization on Solar Radiation of Mountain Traditional Dwellings in East Shanxi — Take Hedi Town and Sandu Village as Examples
Authors: Wang Xia Yang , Shi Qian Fei
Published: August 2014

According to the survey，there are 7.057 billions of residents on this planet , facing a serious situation that land is only 29% of the star area, on which plain takes 1/3 and remains are mountainous region. With such a situation of lower residence and higher population, we must take it into consideration that living states in mountainous region. Due to resent years of high speed financial development among China, residential housing areas increase nearly 2 billions sq per year, among which rural residential building takes half part of the total national area. How to improve living condition and concentrate on low-carbon energy saving would be a required course of every modern architect. Traditional residence in mountainous would offer us modern architects many great ideas. This paper is going to research those out-standing features of Sandu village of Yangquan, Shanxi province.
The Engineering Examples of Sustainable Architecture
Authors: Li Gang , Qiao Qin Qin , Zhou Xue Mei
Published: August 2014

Sustainable building refers to this buildings that can save resources (such as energy, land, water, materials), protect environment and reduce pollution, provide health, application and efficient use of space for the people, and also provide natural harmonious architecture in the whole cycle life. Foreign and domestic development situation of sustainable building design was introduced in this paper. The design strategy of sustainable building is put forward, and the typical case of Sustainable architecture is analyzed. The purpose is to provide a reference for future sustainable building design.
Field Tests of 4 Types of Cool Roof System to Reduce Cooling Load
Authors: Li Yi Ling , Tsutsumi Jun Ichiro Giorgos , Nakamatsu Ryo
Published: August 2014

This is a report on the performance of 4 types of cool roof system through field tests. Cool roof means solar protection on roof surface [1]. The tested systems were solar cells as a shading device, several types of thermal insulation paint as heat reflectors, a rooftop garden as an outside thermal insulator on a roof and a water pond on a roof as a coolant with sensible heat and evaporation. The test results indicated obvious temperature difference between the cool roof and the ordinary surface. The heat flux was calculated from the results to estimate the cooling load saving. Finally, these results were examined from the viewpoint of cost performance.
The Analysis of Annual Dynamic Effective Daylighting on High-Rise Office Building in Jinan
Authors: Zhao Zhong Chao
Published: August 2014

Make full use of natural light is the best way to realize building lighting energy saving. More application value data can be got from the annual dynamic perspective to analysize office building daylighting. This paper first introduces the international new daylighting evaluation standard and related research tool. And then through the computer simulation method to calculate the UDI value of three kinds of sunshade scenes in different toward room. Finally, on the basis of comparison of UDI to different scenes, this paper finds that south, east and west to the room can get wider effective daylighting area by using dynamic curtain.
Optimization of Pass Design of Bidirectional Thermal-Insulation Bricks
Authors: Dong Sha Sha , Feng Xiao Ping
Published: August 2014

The thermal performance of perforated brick is affected by various factors, thermal conductivity, the holes rates, the pass design and etc. included. In order to analyze the impact of the pass design on the thermal performance of bidirectional thermal insulation bricks, the two-dimensional finite element model was developed using ANSYS. The simulated result shows that existence of vertical holes can enhance the thermal resistance in the longer dimension of the perforated brick. Under the condition of the same holes rates, narrowing the width of the vertical holes helps to improve the thermal resistance in the shorter dimension of the perforated brick. The function of these blocks are extremely influenced by the distribution of the vertical holes, the concentrated better than the both-sided when it comes to advancing the whole function.
Literature Review: Mechanical Properties of Hardened Silica Fume Concrete
Authors: He Xi Xi , Wang Qing
Published: August 2014

Silica fume (SF) has become an environmental mineral admixture in the production of high-strength and high-performance concrete in modern concrete engineering. Through compacting all components and pozzolanic reaction, obvious mechanical enhancement of concrete is observed in the aspects of compressive strength tensile strength, elastic modulus as well as fracture toughness. Further more, durability improvement of silica fume concrete such as chloride-ion penetration resistance and chemical attack resistance are reported accordingly.
Analysis of Thord Stress Concentration Factors of KKK Shape Square Steel Tube Node
Authors: Tian Shao Jie , Jiao Jin Feng
Published: August 2014

The stress concentration factor is one of the important parameters of fatigue performance analysis of node.This article uses the ANSYS software, by which the space KKK chord shape square steel tube node stress concentration factor (SCF) is analyzed. Analyzed under three kinds of load (axial force, in-plane bending moment and out-of-plane bending moment ) ,SCF is influenced by Ƭ (branch, head of thickness ratio), β (branch, head width ratio), γ (director of generous than) of the chord and the effect of the nodes is valued in the design of selection of geometric parameters and the calculation of the fatigue performance
Research on the Distribution of Patented Technologies of the Energy-Saving Industry in China
Authors: Qiao Yong Zhong , Liang Qi
Published: August 2014

The energy-saving industry is an important part of the energy-saving and environmental protection industry, which is one of seven strategic emerging industries in China. By analyzing the distribution of patented technologies of the energy-saving industry in China, the following conclusions can be drawn: the energy-saving industry is not yet mature, with the competition in industrial technology fiercer; the distributions of patented technologies is unbalanced, of which innovation activities in the technological field of the environmentally air-conditioning and heat pump is more active; Japan, Korea and other countries’ multinational companies are more prominent in the development of energy-saving industry in China; the domestic technological innovation is dominant in quantity, while some core technologies are still powerful controlled by foreign patentees.
The Mutual Development of the New Energy Industry and the Traditional Energy Industry in China
Authors: Zhu Ting Xuan
Published: August 2014

The energy problem of our country is always prominent. The article states the current situation of the development of the new energy industry and the traditional energy industry in our country and on the basis of the current situation, expound what our country should do on continuing to promote the development of the new energy industry and the traditional energy industry.
Comprehensive Evaluation and Analysis of China’s Energy Security
Authors: Zhang Pu , Wang Huan
Published: August 2014

This paper evaluates of the overall situation of China’s energy security. Firstly, analyzes the current situation of China’s energy security. Secondly, according to the Chinese Energy Statistical Yearbook and BP Energy Statistical Yearbook, induces 10 measures. Thirdly, defines the similar weight by similar figures and scores the 10 measures. Finally, the research shows the 10 measures’ security situation, at the same times gives some advices according to the result.
Analysis of Polycrystalline Silicon-Photovoltaic Industry’s Key Technologies Development and Influences on its Cost and Energy-Consumption
Authors: Ye Chang An , Zhang Xiao Fen
Published: August 2014

Polycrystalline silicon-photovoltaic industry belongs to high-and-new technology industry, but it produces massive by-products (silicon tetrachloride and so on), even partial chloro-silicane and hydrogen chloride exude into the exhaust in its production process. As a consequence, it not only increases the exhaust processing cost in the polycrystalline silicon-photovoltaic industry, but also increases pollutant discharge of the enterprise. At present, Chinese polycrystalline silicon-photovoltaic enterprises cannot solve technical difficult problems in large-scale production due to lack of coordination of chemical industry. Moreover, polycrystalline silicon has high request of purity that needs quite advanced technology to achieve. This article introduces influences upon production cost and energy consumption with the use of improved Siemens method, and proposes that polytrophic-photovoltaic industry needs to be systematized, normalized and standardized for its healthy development.
The Design of the Central Kitchen Logistics Distribution System
Authors: Wang Yan , Zhang Shan Shan
Published: August 2014

The design aims at the central kitchen to flow the system, realizes a lot of function, such as order management, merchandise delivery, storage management, financial control and so on. The system bases on the characteristic of central kitchen which is about "one contains many", follows the simple, economically and practical principle, set up the algorithm for delivery, optimizes the situation for the vehicle, considers the priority of customer, optimized the route of merchandise delivery, enhances the efficiency, reduces the cost, and the order management, the storage management the situation of dynamic management of storage management are more scientific and standardized. Moreover the system has supported the financial analysis function, and the enterprise cost can be analyzed and appraised by mathematics model.
Empirical Likelihood Testing for Linear Instrumental Variable Regression Models
Authors: Zhao Pei Xin
Published: August 2014

Based on the empirical likelihood method, an instrumental variable based testing procedure is proposed for linear regression models with instrumental variables. The proposed testing method can attenuate the effect of endogeneity of covariates. Some simulations indicate that the proposed testing method is more powerful.
The Topological Structure Analysis of Novel Cascaded Wind Power Generation System
Authors: Qian Jin Gui , Zhou Si Jia , Liu Hai Yang , Wang Yan Jun
Published: August 2014

This article focuses on the topics of cascaded wind power generation system with Variable Speed Constant Frequency (VSCF). It consists of four key components, including the wind turbine, dual-rotor motors, low-speed synchronous motor and inverter. This paper summarizes and compares multiple topology form of cascade wind power system, and through the study of the relevant working mechanism, structure and layout of the form, the applicable conditions and scope of the new system are expounded in detail. In particular, as the superiority of cascade system, it makes a synthesis of variable speed and constant speed power generation into reality, thereby the cascaded systems comprehensive operational efficiency are improved.
An Prevent Drunk Driving System Based on Embedded System
Authors: Chen Yi Xian
Published: August 2014

In this paper, a kind of prevent drunk driving system is designed, which is based on the ARM9 core, alcohol detection module, GPS module, GSM module, voice module, LCD (Liquid Crystal Display), power and other functional modules are included in this new system. The system detect alcohol concentration, prevent drunk driving through the voice prompt and send text messages to a preset phone number. The system has absorbed the idea that most of the hardware functionality through software modular, so the circuit in the system is simple and that makes the system stability and accuracy greatly improved.
Numerical Simulation Method of Track Irregularities Based on Secondary Filtering
Authors: Xiang Bao Shan , Han Xing , Wang Xue Wei
Published: August 2014

Track irregularities are the only external excitation in vehicle-bridge coupling vibration analysis and therefore the numerical simulation method of track irregularities is very important. The U.S. frequency spectrum is usually employed to simulate the track irregularities in China. In this paper, the secondary filtering method is introduced to the simulation of track irregularities and MATLAB programing is employed to simulate an example. Based on the comparison of the simulation results and the objective function, it is indicated that the simulation result is reliable and the method is feasible.
The Management Information System Design of Coal Enterprise
Authors: Wu Zi Min , Wang Xiao Ping , Zhang Xu Feng , Song Li Qiu
Published: August 2014

This paper mainly discusses the design and construction in coal enterprises management information system. Construction of coal enterprise information management systems follow the general information system construction process, first through needs analysis clearly the basic functions, the establishment of the system and the overall objectives and the establishment of basic principles; Second, obtain the logical solution based on detailed analysis of coal system, fully describe the existing system of business process and the required data; Finally, using the logic design of the whole system, and form the final software. In addition to this paper gives a detailed program of coal enterprise management, for the establishment of enterprise management information system has a certain guiding role.
Research on Application of Micro-Blog in Mobile Learning
Authors: Luo Ying , Zhang Xiang Qing
Published: August 2014

As a new way of study, M-learning satisfies our needs on fast-learning in this information era. In this article, after introducing the definition and features of Micro-blog and M-learning, the writer has discussed the advantages of Micro-blog’s application in M-learning. At the same time, he has also proposed the related potential problems.
Research on Modeling and Control Strategy for Two-Stage Photovoltaic Grid-Connected System
Authors: Dong Xia , Zhang Li Na , Fu Yu Ying , Ji Cui Lian
Published: August 2014

This paper has built the mathematic model of the single-phase two-stage photovoltaic(PV) grid-connected system. The model consists of a boost DC/DC converter and a DC/AC inverter with LCL filter. On the basis of the variable step perturbation and observation method(P&O), the boost converter changes the output voltage of the PV array by adjusting the duty cycle to realize the PV maximum power point tracking(MPPT). The inverter system restrains the voltage fluctuation effectively by using feed-forward of the grid voltage and current tracking control technology, which has the high performance in both sinusoidal reference tracking and disturbance rejection. LCL filter improves the dynamic performance and restrains the high harmonics efficiently. The simulation with Matlab soft confirms the effectiveness of the model and control strategy.
Energy Efficiency Evaluation of Wind Energy Based on Energy Reports
Authors: Florescu Ana Maria Smaranda , Bandoc Georgeta , Degeratu Mircea
Published: August 2014

Harnessing wind energy for power generation involves first achieving a preliminary study to understand the wind characteristics for the chosen location. In this way, the results are useful for understanding performace of an project that is connected with wind energy. The purpose of this article is to determine global estimates and different energy reports (ER). This is necessary because we do not always have a lots of meteorological datas. For the determination of these reports (ER) it used different kinds of energies calculated for a period of six years, hourly, daily and monthly data. Therfor, it was calculated the energy monthly, seasonally and annually report between monthly energy calculated with daily wind date and monthly energy calculated with instantaneous wind date (R m, Z/I); energy monthly, seasonally and annually report between monthly energy calculated with monthly wind date and monthly energy calculated with instantaneous wind date (R m, L/I); energy monthly, seasonally and annually report between monthly energy calculated with instantaneous wind date and monthly energy Betz (R m, I/B). All these reports were determined for a certain family of wind turbines used for a functional home using wind and solar energy. From the obtained results that are quite significant differences between seasonal and annual energy reports values determined with different types of energy.
Research of Fine and Robust State Estimation
Authors: Li Jing , Luo Ya Di , Lang Yan Sheng , Dou Cheng Long , Zou Yu , Guo Zi Ming , Wang Dong Sheng , Li Xin Peng
Published: August 2014

According to the characteristics of the wind farm measuration, this paper presents a Fine and Robust State Estimation method for solving residual contamination problem caused by large-scale wind power integration. This method introduces the reference value of measurement type into the weight function and uses the pre-check information of state estimation measurement to do SCADA measurement pretreatment, and then form the bad data reference factor to assist positioning the bad data of measurement. Finally, the simulation tests of a regional power grid to prove that the proposed method can effectively identify telemetry bad data of wind farms eliminate residual pollution caused by it, which improve the accuracy of the State Estimation.
The Calculation and Analysis of UAV Solar Array Power Generation
Authors: Zhang Yao , Wang Zheng Ping , Guo Chang Wei
Published: August 2014

In view of the solar array of the solar wing UAV, this paper presents a method of using Bird model and HDKR model to calculate the solution of sun light intensity, and thus the power can be calculated. According to the engineering requirements, it is convenient to calculate the results using DO model in fluent software. Both methods are relatively easy to calculate the surface of the solar array power generation. Finally, this paper makes a detailed analysis on the UAV solar array power characteristics. The flight latitude, season, heading angle and pitch angle of the solar powered UAV have an influence on the power generation characteristics and rules. The results show that the power of the solar power generation quantity, is not only related with the attributes of the battery itself, but also greatly influenced by the weather, season, the UAV flight attitude as well as the latitude and longitude.
Research on the Assessment Standard for the Tidal Current Energy (TCE) Resource Calculation of China
Authors: Shi Hong Yuan , Guo Pei Fang , Cao Xue Feng
Published: August 2014

With the development of TCE exploitation technology, it is necessary to carry out the research on assessment standards of TCE. First of all, this article discoursed the necessity about assessment standards of TCE. Furthermore, it introduced and compared the assessment methods of TCE .Finally, it gives the assessment standard of TCE resource of China.
Study on Performance of Ground Source Heat Pump Systems Based on Site Tests
Authors: Peng Bo , Zhu Na , Hu Ping Fang , Peng Li , Lei Fei
Published: August 2014

This study analyze the actual operation performance and energy efficiency of thirty-nine ground source heat pump (GSHP) systems based on site tests in Wuhan, China. These systems include ground couple heat pump (GCHP) systems, ground water heat pump (GWHP) systems and hybrid ground source heat pump (HGSHP) systems. The results show that energy-saving rates reach 30% for most of the systems using method recommended by Assessment Guideline. The coefficient of performance (COP) of the systems varies as follow: 2.6-4.85 for GCHP systems; 2.58-3.74 for GWHP systems; 2.66-5.67 for combined heat pump systems. According to the test results and system design data, analyses the factors affecting the system performance of three types of ground source heat pump systems.
Feed-Water Enthalpy Rise Optimum Distribution Mechanism Model of PWR Nuclear Power Unit Based on Genetic Algorithm
Authors: Yang Zuo Liang , Dai Zhi Gang , Wang Tong Bin
Published: August 2014

This paper presented a novel method for using Genetic Algorithm (GA) to solve the problem of Feed-water Enthalpy Rise Optimum Distribution in nuclear power unit. According to the characteristics of the pressurized-water reactor unit's secondary circuit, the calculation equations for the power and the heat rate of steam turbine are given in matrix form, the rate of extraction steam is calculated by the general matrix thermal balance equation, and then receive the equation of the efficiency of steam turbine which has relative with parameters of every node in the thermodynamic system in PWR unit. Taking the efficiency equation as aim function, an effective fitness-model was established with the appropriate optimum parameters under the restriction condition, the feed-water enthalpy rise distribution is optimized under the restriction condition by means of Genetic Algorithm. Through the calculation of a 600MW PWR nuclear power unit, the results indicate that Genetic Algorithm has global searching performance, gives a better global optimum than original design value rapidly and shows the relations between the optimum parameters (even the temp parameters) and the optimization easily. Genetic Algorithm is a promising method for analyzed and solved the feed-water enthalpy rise optimum distribution in PWR nuclear power unit.
Effect of Dissolved Oxygen Content on Gelling Strength of Chromium Gel in Block Hai 1
Authors: Yuan Peng Fei , Cao Guang Sheng , Ma Xiao , Wang Xiao Ping , Tian Xin
Published: August 2014

Jinma company of Liaohe oilfield has carried out weak gel flooding in-depth in block Hai1 and achieved good effect. But in the process of profile and flooding, problems of gelation fluctuating and gelling rate declining seriously affected the implementation effect of the profile control and flooding project. It is researched that one of main factors affecting gelling effect of profile and flooding system is the dissolved oxygen. Aiming at this problem, this paper studies critical value affecting gelling in combination with the actual situation of polymer displacement in block Hai 1. The experimental results show that, content of dissolved oxygen affects both gelling strength and gelling time of weak gel in the way that when dissolved oxygen content is between 0mg/L and 3mg/L, low gelling strength and long gelling time are obtained, while in the range of 4mg/L-10mg/L, gelling effect is good. Two critical values are respective 1.5mg/L and 7mg/L.
Chemical Agents Formula of Deep Profile Controlling for Niuxintuo Fractured Reservoir
Authors: Liu Xiao Juan , Cao Guang Sheng , Gao Ben Cheng , Yin Hua , Li Tong
Published: August 2014

Niuxintuo reservoir is a low permeability fractured reservoir with high pour point oil reservoir.control agent formula obtained via laboratory test can effectively improve iulection profile, which can be evaluated by performance of salt tolerance, Core plugging experiments shows that this profile control agent has achieved a success rate of 97%,the purpose of blocking high permeability formation is achieved.
Effect of Shape and Modification over ZSM-5 Catalyst on Methanol to Gasoline
Authors: Gao Xiao Feng , Ding Chuan Min , Liu Wei Li , Fan Lin Feng , Song Gang , Wang Jun Wen , Zhang Kan
Published: August 2014

Fixed bed reactor was used to explore the catalytic performance of ZSM-5 catalysts with the forms of flake and strip in methanol to gasoline (MTG) reaction. The catalyst samples were characterized by XRD, BET and SEM. The strip ZSM-5 catalyst was modified by 0.4 Molar NaOH solution, which was denoted by TZSM-5/AT. The results show that ZSM-5 molecular sieves could be effectively dispersed to prevent carbon accumulation when extruded with binder. So the coke deposition resistance capacity of strip ZSM-5 has significantly enhancement comparing with flake ZSM-5. Mesoporous structure in strip zeolites formed after NaOH treatment, which could prevent coke formation and further improve catalyst life. The conversion of methanol remains above 80% over 140 hours on alkali-modified strip ZSM-5 operating at atmospheric pressure, 380°C and weight hourly space velocities (WHSV) of 1.5 h-1.
Low-Temperature Co-Pyrolysis Products of Low Rank Coal and Enteromorpha
Authors: Wang Chun Xia , He Xuan Ming , Zeng Xian Can , Zhang Du
Published: August 2014

Co-pyrolysis characteristics of low rank coal (LRC) and enteromorpha (EN) in different proportins were studied in a dry distillation equipment. The results show that he maximum tar yiled of blends was 11.39% with a EN ration of 30%, which increased by 28.61% compared to LRC pyrolysis alone. In the co-pyrolysis tar ,the alkanes’ content was 48.66% and the phenolic was 9.12%, which was significantly higher than the content of the corresponding components of the original tar. The H/C ratio was increased by 9.87%. It indicated the pyrolysis tar became lighter on some degree. While the contents of CH4and H2in the pyrolysis gas were increased. SEM analysis showed the surface of co-pyrolysis semi-coke became rough and formed obvious center cracks. The heat value of co-pyrolysis semi-coke was higher than that of semi-coke from LRC.
Research on Charge and Discharge Strategy for Centralized EVs Charging Stations
Authors: Chen Hong Hui , Liu Ji Chun , Zhao Yan , Liu Jun Yong , Tian Hao , Zheng Xiao Li , An Xiang Yang , He Chen
Published: August 2014

High penetration of electric vehicles has brought huge impact on the safe and stable operation of power grid. How to effectively improve the comprehensive utilization rate of electric vehicle charging and discharging has become the most important problem for the grid operation. In this paper, we establish the centralized station model which takes the minimal real power loss as its objective and bring variance optimization function. Using IEEE 30-bus system as simulation system, this paper uses genetic algorithm to find the best solution of the above model. The result shows that reasonable arrangement of charge and discharge plans not only smoothes the load curve, but reduces real power loss.