bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Crack Prevention of Premixed Concrete of Pump Station Built in Summer
Authors: Bie Ya Jing , Huang Jian Yong , He Yong , Zhu Ming Di , Zhang Nan Nan , Qiang Sheng
Published: January 2015

In the summer of southern cities of China, the duration of high temperature becomes longer which requires stricter temperature control and crack prevention measures for mass concrete in construction. By using finite element method for unsteady temperature field and stress field a simulation is made for a pump station built in summer. The cement hydration velocity of this engineering is so high that makes the temperature control very difficulty. Through result analysis of different cases, some optimized measures which include surface preservation and water cooling are proposed. It has an important significance for concrete structure in the same area.
Stability Analysis of Loess Landslides Induced by Irrigation
Authors: Duan Zhao , He Zi Guang , Lin Hong Zhou
Published: January 2015

This passage picks up the case of the loess landslide in Zhangcunwan, Jingyang county, Shaanxi province for the research of the formation mechanism and stability analysis of loess under the condition of irrigation, which raises the dynamic equations of loess landslides induced by irrigation,and applies the equations into the case in the landslide in zhangcunwan. Besides,the passage has given the trajectory equations in the landslide in Zhangcunwan and verifies, as a consequence ,the results can be calculated accurately and it generally tallies with the actual one. The internal soil anti-shearing strength and the safety factors will decrease when the groundwater level rises 1m per case till the stabilizing force decreases by the soil sliding force when the whole slope if in the state of limited equilibrium.As the contents of irrigation rising continuously of the water level, the anti-shearing strength will be outdone by the shearing strength and this shall bring about the loss of the stability of the slope..
Analysis Carrying Capacity of Hydraulic Concrete Dam
Authors: Cheng Chang Ming
Published: January 2015

This paper makes analysis on accelerated speed overload and hydraulic pressure after earthquake, as well as the relationship between the ground motion peak acceleration and the dam body displacement, dam body damage volume ratio, and dam facing damage volume ratio. According to dam body partition, this paper takes the ratio of over stress accumulative duration and stress required capacity as parameters, and studies arch local earthquake damage evaluation of dam body partition. After analysis, it is found that after arch dam experiences different geological process, there are damages in both sides of dam abutment and upper part of dam body, overstressed area expands continuously and local damages take place.
Analysis on Construction Influence of the Underpass of Oblique Crossing Subway Tunnel
Authors: Zhang Ming , Fan Jin , Pan Bing Yu
Published: January 2015

With the rapid development of the city, the construction of underpass of adjacent subway tunnel will have influence on the safety of subway operation. Base on underground pedestrian passage engineering, the complex construction conditions of oblique crossing-over subway running tunnel for A section channel is considered, plane strain finite element simulation analysis for the excavation and support and secondary lining construction of A section channel are conducted, and two kinds of construction conditions of adjacent and crossing subway tunnel for A section channel are simulated, the influence of the construction of A section channel on adjacent subway running tunnel is also analyzed. The results were shown that the maximum floating upward value is within 1mm and almost no lateral displacement during the construction of A section channel. which meet the requirements of urban rail transit safety operation, and the basis for advanced control of underpass construction is provided.
Current Status of Research on Two-Layer Porous Asphalt
Authors: Tang Guo Qi , Li Ming Liang , Ji Tian Jian , Liu Zhao
Published: January 2015

In this paper, the background and the concept of two-layer porous asphalt are firstly introduced. The development of two-layer porous asphalt is stated. The properties of asphalt binder and aggregates, mixture design methods and construction technology are then analyzed. In addition, the typical structure and noise reducing property in different countries are also discussed. This study provides technical support and information for developing two-layer porous asphalt in China.
Finite Element Simulation Analysis of Separate Overpass Structure
Authors: Liu Yue Liang
Published: January 2015

Overpass is the important part of urban transportation infrastructure. This paper adopts finite element method to carry out three-dimensional finite element simulation analysis for Longhai railway separate overpass. Researching variation law of the overpass’s stress and displacement in construction process and operating process. Analysis results show that, structure of Longhai railway separate overpass is reasonable, force of overpass structure is explicit, it meets the requirements for engineering.
Torsional Design Method of Bottom Frame Structure with Irregular Plane
Authors: Deng Hong Yu , Sun Bai Tao
Published: January 2015

For the study of irregular plane adverse impacts on the bottom frame structure seismic performance, in this paper, a serious damaged bottom frame structure in Wenchuan earthquake is taken as the research object,and a comparative calculation model is designed and elasto-plastic time-history analysis is carried out on the use of ABAQUS finite element software. The calculation results show that: the stiffness center of floor with irregular plane does not coincide with the center of mass, this eccentricity will produce torsional response under horizontal earthquake action. Bottom frame shear layer has strong stiffness at the center, around the lack of lateral load resisting member will cause interlayer torsional rigidity insufficient, further increasing the torsional response of structures, aggravated the damage. The lateral stiffness ratio under the same conditions,the design method of the contrast model is more reasonable, and has lighter damage under the the same intensity grade, improve the seismic capability of the structure, and provides the ideas of design method of this kind of structure.
Model Simulation of Power Saving and Heat Saving in Intelligent Building Energy Saving Design
Authors: Lu Jun , Wu Xin , Yan Yang , Zhang Xiao Yun
Published: January 2015

The power saving and energy-saving control plays a crucial role in green building design. An intelligent electricity and heat saving control method is proposed based on PID control optimization control, this algorithm is applied in the design of green building, the collection of data is taken with feedback processing, the design method of energy saving and heat savingcontrol unit is presented in intelligent building, it provides the accurate basis for energy-saving and heat saving cycle control optimization design. The application of energy circulation control in design of green buildings is realized. The four layers real building is taken as the subjects in the experiment, the experimental results show that, the controller is applied in energy saving control of green building, it can effectively improve the control accuracy.
Radiation and Sunlight Greenhouse Light Environment Model
Authors: Yang Wen Xiong , Wang Xiao Zhi
Published: January 2015

This paper outlines the research status of solar radiation at home and abroad, it discusses the weather cloud, greenhouse covering materials and other factors on the effect of light greenhouse environment, at the same time it summarizes the initial results of light greenhouse environment model simulation research, it also points out the research direction of unsolved problems and future on the light greenhouse environment, we consider the sunlight greenhouse with guidance and reference from the angle of light environmental.
A Research on the Optimization of Earthwork Allocation
Authors: Ren Xu Kai , Fan Lei , Feng Jiao Wei , Ning Xiao Dong
Published: January 2015

In the earthwork allocation, the deployment of Turkish solving method commonly used in the current Planning Act the "tabular method" to improve a "folder on both sides of the table to force the working method." This method can improve efficiency, reduce testing and other steps, and can be more accurate and efficient optimal solution.
Numerical Simulation of Projectile Penetration into UHMWPE Fiber Reinforced Concrete
Authors: Zhang Yu Wu , Yan Lu Hui , Li Ling Feng
Published: January 2015

Based on LS-DYNA 3D finite element program and Holmquist Johnson Cook (HJC) model, a numerical simulation research on a new type of fiber concrete reinforced by UHMWPE fiber against 12.7 mm Armor Piercing ammunition was conducted. The results show that the simulated results to penetration depth have a good agreement with experiment data. An ACE modified formula both considering promoted tensile strength and toughness reinforced by UHMWPE fiber is proposed, whose theoretical results are very close to that of experiment and numerical simulation and can predict the penetration depth of UHMWPE fiber concrete (UFRC) well.
The Selection of Commercial Residential Building Energy Saving Reconstruction Object Research
Authors: Wang Jing , Yang Zhan She
Published: January 2015

Energy saving of buildings in our country started from 90’s,which is so late that remaining at a low level .Although certain success has been achieved ,architecture reconstruction moves slowly on the whole ,especially for residential buildings. One of the reasons for this situation is lacking of money for energy saving reconstruction .Considering the enormous number of energy saving reconstruction buildings with the limited funds ,human resource and material resource, it is necessary to make a selection before the reconstruction ,weeding out the projects that are too poor to reconstruct in safety, functionality and energy-saving reconstruction, as well as the ones that have good energy saving performance and meet the energy efficiency design standards, which aren’t built for ages. The key point is to choose the existing buildings which are in urgent need of transformation in performance, economically rational and have feasible technic proceeding in batches with plans. Meanwhile, the reconstruction should use appropriate technology, combining with local climate characteristics.
Research on Planning of Urban Plant Landscape
Authors: Zhou Xu Dan , Qi Hao , Qi Yue , Cai Yan , Yang Li Hong
Published: January 2015

With the rapid economic development of our country in the 21th Century, the plant landscape design of city has changed. The scale of plant landscape design in city is improved into more large level gradually in its developing process. In this paper, we explore the green plant landscape ecological design methods and have the analysis of plant landscape situation and existing problems. Combines the city region characteristic property and culture, the arbor is backbone's biological community, abides by law of nature shown by this locality forest plants vegetation zone middle. From a macroscopic planning angle, we make clear and definite the notion of city plant landscape in the level of theoretical research, separate the plant landscape in city from in countryside or in the natural protection area, and reveal the characteristic of plant landscape in city which is a special ecological environment.
Engineering Design and Recheck Computation of Trench-Buried Inverted Siphon
Authors: Liu Yue Liang
Published: January 2015

This paper provides design scheme for Guodi river trench-buried inverted siphon engineering, and universal finite element calculation software is adopted to carry out force analysis inverted siphon, researching variation law of the inverted siphon’s stress and displacement in operating process. The calculation results further shown design scheme’s rationality and safety, this provide the reliable basis for engineering design.
Study on Innovation of Indoor Spatial Curved Surface on Web
Authors: Song Yong Jun
Published: January 2015

It analyzes that innovation is the main factor in the development of indoor spatial curved surface from a scientific perspective. The factors composing indoor spatial curved surface are developing and changing, including various sources, shapes, ratio, materials and so on, thus laying the foundation for the design of innovative indoor curved surface. The uniqueness of indoor spatial design will become the core value of social development in the 21st century. People are becoming bored and dissatisfied about the similar, boring and unchanged indoor space. They all hope that designers can create diverse and various styles of indoor space on the prerequisite of comfortable life so as to satisfy their changing demands on materials and aesthetical perceptions as well as adapt to the development of the times.
Research on the Geometry Nonlinearity of Wind Turbine Blade
Authors: Tang Di , Lu Zhi Liang , Lv Bin Bin , Guo Tong Qing
Published: January 2015

It is presented that the nonlinear aeroelastic effect is considered for the dynamic response analysis of large scale horizontal wind turbine. The blade of wind turbine is built by composite laminate model using the finite element method. The unsteady aerodynamic loads are predicted with prescribed vortex wake method, which considers the aerodynamic-structural coupling effects. The aerodynamic loads are applied to the blade structure model, and the nonlinear dynamic aeroelastic equations are established. The equations are linearized and the blade modes are obtained at the static equilibrium position, thus the dynamic responses of a blade are calculated using the modal method. The results show that the geometry nonlinearity reduces the vibration amplitudes of the blade.
The Selection of Ceramic Dry Granulating Machine Spray Device Based on the DPM Model
Authors: Wu Nan Xing , Zhan Tian Tian , Jiang Zhu Ting
Published: January 2015

In order to improve the dispersity of true particles in the process of ceramic dry granulation, by adding a sprayer in the upper of granulation chamber to make water spray into droplets, which greatly increases the contact area of liquid water and powder. The atomization flow field of plain-orifice-nozzle, pressure-swirl-nozzle, air-blast-nozzle, effervescent-nozzle with 1mm nozzle diameter is simulated based on the DPM model, obtaining the droplet size distribution cloud picture and atomization flow field simulative cloud picture of four kinds of nozzle. The simulation results show that the average droplet size of pressure-swirl-nozzle is the minimum and the disperisity of atomization flow field of air-blast-nozzle, effervescent-nozzle, pressure-swirl-nozzle, plain-orifice-nozzle increases in turn. In terms of the average droplet size and the dispersity of atomization flow field, the droplet dispersity of pressure-swirl-nozzle is better and the average droplet size is the minimum, which is most beneficial to solve the problem of fully dispersity of really particle. Therefore, pressure-swirl-nozzle is best fit for the spray device of ceramic dry granulation.
Wire Tension Force Variable Universe Fuzzy Control in Fixed Abrasive Wire Saw Manufacturing
Authors: Bi Wen Bo , Ge Pei Qi , Gao Yu Fei
Published: January 2015

The structural characteristics of the tensioning device in the wire saw manufacturing equipment is introduced. Based on the characteristic of the strainer, the principle of variable universe fuzzy control is adopted to deal with the controlling objects. The design of two stage fuzzy controller and its parameters are discussed. The system simulation shows that the control scheme can make the tension within the stable range.
The Thickness of an Aircraft Wing Skins Optimization Based on ABAQUS
Authors: Yang Zheng Ran , Jiang Yi , Huang Cong
Published: January 2015

Wing skins play a vital role on the wing structure as well as the inherent characteristics of the wing. The thickness of the wing skins affects many of the key parameters of the wing. To study the impact of the thickness of the wing skins on the modal characteristics of the wing, and to preferable for the thickness of the wing skins, a certain type of aircraft wing model as an example, we carried out on the wing modal analysis and preferable the thickness of the wing skins based on Abaqus. The calculations show that the thickness of the wing skins are all affected on each wing modal frequencies, modal size of displacement and stress.
The Machining Method of Numerical Control Lathe to Irregular Curve Profile
Authors: Zhou Yong Qing , Wei Bo , Xue Shao Ye
Published: January 2015

For rotational parts with irregular curve profile, in order to achieve its manual programming and machining, we need to segment the contour curve according to the change of curvature. Through the calculation, we can get the minimum arc to fit the segments, and calculate the circular endpoint coordinates and radius by using the drawing methods. Finally, we develop the NC program. By the analysis of the result, we find the method can simplify the programming and improve machining efficiency.
FANUC CNC Lathe System Based on Macro Processing of Special Curves
Authors: Wu Shuang
Published: January 2015

Based on FANUC nc lathe catenary macro program, explores the rule curve macro program compiling method, using a simple example is given to illustrate the macro program programming method, the workpiece coordinate origin is not Z zero programming method, the continuous processing same shape graphics macro programming method, provides the programming method of the other special rule curve and reference .
The Effect on the Stability of Rear Drive Vehicle with Viscous Limited Slip Differential
Authors: Jin Li Qiang , Wang Ze Wei , Yin Dong Xu
Published: January 2015

This article reflects the influence on the limited slip differential (LSD) for the rear drive vehicle handling and stability through the process of stress analysis of automotive steering movement, where the vehicle dynamic simulation model including the LSD system is established, and it also has the analysis of the effects on the LSD for vehicle dynamics stability. Viscous Limited Slip Differential (VLSD) has influences on the motion characteristics of the vehicle in many aspects, including vertical movement and lateral movement that is most remarkable. It is obvious to improve the dynamic property and trafficability by it on the bad road for cars in longitudinal motion, but at the same time it also produce a great impact on the lateral movement characteristics of the automobile because of the unequal distribution of vehicle driving force.
Analysis of Stamping Residual Stress Influenced on Body Stiffness
Authors: Han Cui Hong , Qu Zhou De , Chen Yong Lu
Published: January 2015

Residual stress generated in the body parts during stamping process influences on its structural strength and stiffness partly. In this paper, the formality, stiffness and strength of hood-outer panel had been analysis based on Autoform and Altair-hypermesh, and the diagrams of major strain and plastic strain are shown. Compared the results by Geomagic Qualify; there are the same areas of stress concentration from the results. According to this, the body parts can be optimized to get excellent preference of stiffness and strength.
Study on Floating Roof Tank Nitrogen Lightning Protection System
Authors: Wen Jian Jun , Ding Bo , Zhang Le
Published: January 2015

In order to study the feasible floating roof tank lighting protection technology, this paper put forward making oxygen concentration remain below 8% through inerting sealed space, thus reduces fire risk. By analyzing the oxygen concentration change after injecting nitrogen into the sealed space, sets up the relationship between the oxygen concentration change and nitrogen injection volume. Mean while, through the experiment when the sealed space maintains the micro positive pressure, established a formula about the nitrogen flow and micro positive pressure, which can obtain nitrogen amount directly under different wind velocity and lightning time to complete inerting. Finally, design a nitrogen protection system which can protect lighting fire, and can put out floating roof tanks initial fire.
Design and Construction of Solar Absorption Refrigerator Using Organic Compound (R134a and Tetraethelene Glycol Dimethyl Ether)
Authors: Jin Mei Hua
Published: January 2015

Absorption refrigerator is not a new concept. It provides advantages of being silent, of having no compressor, which also makes it lasting a long life cycle. Particularly, it can utilize low level waste energy. In this contribution, a 2-fluid aqua-ammonia prototype is analysed and an overall design and construction procedure of a mini-type, 3-fluid absorption refrigerator is given, with working fluids of organic compounds (R134a as refrigerant and Tetraethelene Glycol Dimethyl Ether as absorbent) and a pressure balancing gas. The aim of this project is to develop a potential mini-type cooling system for rural areas, where electricity is scarce or non-existed. The experiments showed the combination of R134a and TEG.DEM for mini-type solar absorption refrigeration is theoretically realisable; To have an ideal performance, except of interfusion of non-condensable gas and impermeability of the system, the filling methods, vacuum drawing state as well as the stability of input power are all crucial influence factors.
Review of Soil Temperature Recovery Characteristics of the GSHP System
Authors: Xue Di Di , Wang Xin , Cheng Zhi Wen
Published: January 2015

Ground-source heat pumps (GSHPs) are receiving increasing interest because of their potential to be energy-saving and environment-friendly. The recovery of the soil temperature which ambient ground heat exchangers (GHE) is closely related to the stable and sustained operation of the GSHP system, thus a lot of investigations were carried out. This paper reviews the research made by different methods about the recovery of the soil temperature in and out china.
Research on the Thermal Conductivity and Thermal Diffusivity of Magnesium Alloy
Authors: Guo Rui Hua , Zhang Jie Yu , Wang Lin Min , Fan Yi , Guo Ying Jian
Published: January 2015

Magnesium, as a kind of lightweight engineering material whose reserves is considerable abundant in the earth, is green environment-friendly materials for the 21st century. Magnesium alloys with its proportion of smaller than the advantages of high strength, good thermal conductivity and easy machining, is becoming a hot spot of attention and research. In this paper, the effects of magnesium alloys thermal conductivity and heat diffusivity were analyzed by consulting documents. Researches showed that all effects of the electron or phonon movement had affected thermal conductivity and thermal diffusivity of alloys. Furthermore, the thermal conductivity and thermal diffusivity of rare earth magnesium alloy were summarized by literature data, Researches showed that Add moderate amount of rare earth elements can improve the thermal conductivity and heat diffusivity of magnesium alloys.
Research on Broken Filament Detection Method of Silk Product
Authors: Yang Chang Niu , Sun Xing Bo
Published: January 2015

In this paper, we put forward a kind of adaptive edge detection algorithm of Gabor filter for silk product broken filament image. Use different directions’ Gabor filter to respectively get the broken filament image edge information. Using the method proposed in this paper to fuse the edges adaptively obtained from different directions Gabor filter, we obtain ideal image edges, and effectively eliminate the noise, also enhance the fuzzy edges at the same time. Experimental results show that the algorithm for silk products processing is effective, and the broken filament detected is clear.
The Research on the Target Tracking of Infrared and Wireless Temperature Measurement System
Authors: Liu Fang , Wang Gang , Wang Yan Quan
Published: January 2015

A set of integrated system of target location and tracking and temperature wireless transmission are designed through infrared tracking, wireless frequency identification and digital temperature sensor. Hardware composition and software design approaches of the system are elaborated and the system test results are also provided.
A Study on the Cool Charge Characteristics of Ice Storage Plate Filled with Eutectic Salt
Authors: Ji Chang Fa , Yu Xin Yuan , Liu Gang
Published: January 2015

The electricity load imbalance between day and night of air conditioning greatly affect the power generation cost and safe operation of power grid. Because of the important role in balance the peak and night electricity load, the Cool storage technology more and more attention at home and abroad. A cool storage experimental apparatus with internal melt ice-on-coil was set up, and on which the heat-transfer characteristics have been determined. The experimental results show that:The inlet temperature of refrigerant,when entering the ice storage tank, has an larger influence on the process of cool storage than the flow amount of the cooling medium. It is found by analyzing the process of experiment about storage that the suitable outlet temperature of the cooling medium is 1°C while the flow amount of the cooling medium is 0.274 m3/h. The research results can provide help for the energy-saving design of air conditioning.
Temperature Measurement System Design Based on LonWorks Power Line Communication Technology
Authors: Ma Ke , Ling Wei , Kong Xiang Rong
Published: January 2015

This paper briefly introduces the power line carrier communication and field bus technology on LonWorks. The research on Application on LonWorks in temperature measurement system introduces how to use PL3120 to design a two temperature measuring system based on power line carrier communication of LonWorks from the aspect of software and hardware. The following key code of software has carried on the detailed notes.
A Kind of Gas Density Monitor System Based on CC2530
Authors: Li Zheng Dong , Guo Qiang , He Yin Xu , Tu Ke , Wei Yi
Published: January 2015

Gas monitor system based on wireless sensor network technology and ZigBee overtakes
the limitation of traditional system that the situation in mine is unknown in time. With this system, the security manager can real-time monitor the gas density of multi-location .Compared with traditional system, this system is portable and extensible and it also has advantage of physical size and power consumption. This paper describes both the whole system architecture and the structure of single node. The results show that the system is safe, stable and guarantee the security of miners.
Development of Defect Detection Algorithm in Cellular Denitration Catalyst
Authors: Chen Liang Ren , Zheng En Hui
Published: January 2015

Denitration catalyst defect detection based on image processing plays a vital role in automated inspection of product quality. In this paper, we propose a defect detection algorithm based on image processing to inspect the cellular denitration catalyst. In pre-processing, Hough transform, morphological processing and connected component labeling are used to find the defect location. In the process of defect categories recognition, the Hu moments combined with geometrical features are used. Besides, support vector machine classifier is trained to detect the defect categories. The proposed algorithm shows high defect recognition accuracy achieving 96% overall.
Design of the Embedded RLC Measurement Module
Authors: Chen Jin , Bao Long Li , Yu Ya Yun , Ding Fang
Published: January 2015

Based on the frequency measurement principle, an embedded RLC measurement module was designed in this paper. By the RC oscillator circuit and LC three-point oscillator circuit, the R, L, C analog parameters can be converted into a digital frequency for single-chip computer processing, according to the relationship between a function of frequency and component parameters, the RLC components corresponding parameter values is calculated​​. Experimental results showed that the RLC module has an automatic conversion range, high precision, enabling network connections and so on. It can be applied to management and fault monitoring and forecasting power transmission lines, oil and gas pipelines and submarine cables and other important public facilities.
A Simple and Sensitive Method of Monitoring Crack and Load in Three-Point Bending Fracture Mechanics Specimens Using Strain Gages
Authors: Zhang Xiao Peng , Chen Yan Qiang , Xing Huai Nian , Jin Li Qiang , Li Da
Published: January 2015

In fatigue crack growth experiment and fracture toughness test, the crack length measurement is very important. Here, this paper proposes a new method for measuring crack length, namely in the case of a known load, according to the strain on the front end face of the three point bending specimen would be to get crack length.
Infrared Image Simulation of Ground Maneuver Target and Scene Based on OGRE
Authors: Mu Cheng Po , Peng Ming Song , Dong Qing Xian , Gao Xiang , Zhang Rui Heng
Published: January 2015

Infrared scene simulation has extensive application value in military and civil fields. According to the specific experiment environment, this paper simulation of an infrared scene and according to the experimental data produced infrared texture library. First of all, through the 3Dmax modeling software to establish the target infrared radiation model, and calculate the relevant radiation data of it. Then analyze the radiation characteristics of the relevant materials, the establishment of infrared texture library for each material. And finally, use OGRE engine image rendering technology and GPU programmable pipeline technique to simulate a complex infrared scene close to the real.
Fast Face Detection Based on AdaBoost and Canny Operators
Authors: Zhang Lin
Published: January 2015

Detection speed of traditional face detection method based on AdaBoost algorithm is slow since AdaBoost asks a large number of features. Therefore, to address this shortcoming, we proposed a fast face detection method based on AdaBoost and canny operators in this paper. Firstly, we use canny operators to detect edge of face image which separates the region of the possible human face from image, and then do face detection in the separated region using Modest AdaBoost algorithm (MAB). Before using MAB to achieve face detection, utilizing canny operators to detect edge can make this algorithm effectively filter information, retain useful information, reduce the amount of information and improve detection speed. Experimental results show that the algorithm can obtain higher detection accuracy and detection speed has been significantly improved at the same time.
Design and Development of a Resistive Grain Moisture Meter
Authors: Wang Wang Ping
Published: January 2015

Moisture measurement of grain is an important aspect of its quality indicators. In this paper, a resistive grain moisture meter device was developed and the measuring principle and adopted scheme were illustrated. The structures and work principles of the resistance-to-frequency switching circuit and the temperature compensation circuit were introduced in detail. Finally, this paper gives a brief introduction to the mechanical grain sample. The resistive grain moisture meter has the advantages of fast testing speed, high precision and low cost, it’s one of the important tools in measuring grain moisture.
Error Items Analysis of the Cantilever CMM with REVO Applied
Authors: Zhang Hai Tao , Liu Shu Gui
Published: January 2015

Compared to the conventional CMM(coordinate measuring machine) with three orthogonal axes, the CCMM(Cantilever CMM) researched in this paper has two axes perpendicular to each other and one rotary axis. Hence, the error parameters in CCMM are also different from the 21 items geometrical errors in CMM. The application of REVO in CCMM makes a big difference compared with the application in CMM. This paper analyzes the error items existed and needed to be calibrated in CCMM and identifies the error parameters of REVO schematically, which lays a solid foundation for further research and application of REVO in non-orthogonal CMM.
Research on Digital Baseband Converting Methods in Interference Measurement System
Authors: Hou Xiao Min , Wei Shao Jie , Lian Xin
Published: January 2015

Focused on DBBC(digital baseband converter) which is used in interferencemeasurement system, two typical digital baseband converting methods are introduced. Using parallel structure and poly-phase structure to improve the orthogonal mixing method, the method based on parallel conversion is proposed. Combining the efficient PFB(poly-phase filter bank) channelization with theflexible orthogonal mixing , the method combining PFB channelization with the orthogonal mixing is proposed. This method can realize full spectrum received.Considering the efficiency and power, the method combining PFB channelization with the orthogonal mixing is better.
Study Status of Giant Magnetostrictive Material Applied in Measurement Field
Authors: Liu Hui Fang , Zhang Jian Chun , Li Ke Ran , Li Ye
Published: January 2015

Giant Magnetostrictive material is a new type of rare earth functional material which is after the rare earth permanent magnets, rare earth luminescent material and rare earth high temperature superconducting material. At present, giant magnetostrictive material has become a domestic research hot spot, and made great achievements. In this paper, research and application status on giant magnetostrictive material has been summarized. It mainly includes two aspects: giant magnetostrictive sensors and self-sensing actuator.
Research and Design of Abnormal Sound Online Monitoring and Positioning System for Substation Equipment
Authors: Tang Xiang Hua , Zhu Fu Yun , Gao Xian Feng , Qian Jun Wei , Wang Xing Xing
Published: January 2015

In order to further improve the operation reliability of substation site equipment, abnormal sound online monitoring and positioning system for substation equipment was designed. This system consists of on-site monitoring unit, system server and client three parts. Three key technologies were researched and developed: substation abnormal sound automatic identification technology, substation abnormal sound video positioning technology and substation abnormal sound message warning system technology. Abnormal sound online monitoring and positioning system for substation equipment has reasonable structure and good results.
Numerical Simulation and Parameter Optimization on Forming Process of Automobile Torque Box
Authors: Zhang Wen Juan , Wu Long , Chen Gang
Published: January 2015

In this paper the drawing process of Box-torque was simulated by Dynaform, which is FEM simulation software. The process parameters, which affected the quality of forming, were optimized by finite element simulation. The emphasis was focus on the optimization of draw-bead and BHF and data were summarized from the optimization graphs. In this simulation, lengthways draw-bead was set on the technical face for reducing or eliminating wrinkle. It was innovation difference from the usual that the draw-bead was set on binder. Finally the correctness of simulation was approved by comparing the optimization of simulation with the data of experimentation.
Research on Control System of Roll Forming Production Line with Fixed Mould and Moving Roll of Variable Cross-Section
Authors: Shi Bi Ying , Li Qiang , Guan Yan Zhi , Wang Shi
Published: January 2015

The roll forming production line with fixed mould and moving roll of variable cross-section is a hydromechatronics line that implements the automatic processing of vehicle parts. Some technical problems of mass production of complicated cross section parts can be solved successfully by the production line, such as the low stability, the uncontrolled dimensional accuracy and the sheet deformation while a variable cross-section is cut off. The control system for the complete production line mainly consists of these parts: Siemens Simotion D455-2 motion control system, IPC, touch screen, ET200M input and output modules and so on. In order to develop the control system for the production line, the article completed system general design, full-closed loop control structure design and software design. It also completed building of hardware platform, development of software system and research of interpolation algorithm. Through several experimental verifications, the control system for the production line can meet the requirement of actual production.
The Application of Adaptive BP Neural Predictive Fuzzy Control in Cement Decomposing Furnace Temperature Control System
Authors: Li Sheng Wang , Duan Xin , Liu Zhen
Published: January 2015

Cement decomposing furnace is a typical multi-variable, nonlinear, large delay and strong coupling complex control object, its difficult to establish accurate mathematical model, the conventional control algorithm is difficult to get satisfactory control effect. By applying adaptive BP(back propagation) algorithm in neural network modeling, make the neural network predicts the decomposing furnace outlet temperature, then modify the pulverized coal flow rate value that obtained by the fuzzy controller to control the decomposing furnace outlet temperature. The field application shows that the control software which is designed by the control algorithm in this paper responses quickly, the error between actual temperature and the expected value is small, it has a good reliability, adaptability and robustness.
Research on Control Strategy of Hydro-Viscous Driven Fan Cooling System
Authors: Ma Li Gang , Xiang Chang Le , Zou Tian Gang , Mao Fei Hong
Published: January 2015

The paper proposes a cascade control strategy of speed feedback in inner loop and temperature feedback in outer ring for hydro-viscous driven fan cooling system, and compares the simulation of PID and fuzzy PID. The simulation result shows that the double-loop control system while the response time longer, but much smaller overshoot, can achieve a good feedback to adjust the fan speed and temperature and realize stepless speed regulation of hydro-viscous driven fan cooling system under the premise of stability for fan speed and system temperature.
Based on a Microcontroller the Real-Time Control System Design of Manipulator of Multiple Degrees of Freedom
Authors: Duan Rui Yong , Yan Ji Ling
Published: January 2015

Manipulator of multiple degrees of freedom has been widely used in all kinds of rescue and exploring robots. This paper regard a kind of 6 DOF manipulator controller as the design object.The data acquisition for WDD35D4 sensors is carried by the C8051F020 microcontroller and sent through a wireless transmitter NRF905 after encrypted.Then the wireless transmitter NRF905 of the manipulator receives decryption. Through data processing and the steering gear adjustment, the angle of linear potentiometer corresponds to the angle of steering by 1-1. Then it drives the manipulator to work out and simulate the same motion of mechanical arm controller, and make real-time synchronization control.
The Poultry Voice Classification Model Based on EMD and Support Vector Machine
Authors: He Dong Kang , Zhang Shou Ming , Bi Gui Hong , Yu Rui
Published: January 2015

According to the non-stationary and non-linear characteristics of poultry voice and the situation that it`s hard to obtain enough sound samples, a poultry voice classification method based on Empirical Mode Decomposition (EMD), Teager energy transformation, and Support Vector Machine (SVM) is proposed. Firstly, the poultry voice signals are decomposed into a finite number of intrinsic mode function (IMF).Then, the Teager energy of five IMFs filtered are used to form characteristic vectors. Finally, the eigenvectors are put into a support vector machine classifier . The results of animal voice signals experimental recognition showed that this method had high accuracy and good generalization abilities even in the case of small number of samples. The approach proposed could identify the poultry voice effectively.
Model-Based Design of Line-of-Sight Control Systems
Authors: Su Kui Feng , Chang Tian Qing , Zhang Lei
Published: January 2015

With the complexity of system design growing, the high quality software design are needed. In this paper, the design procedures based Model-Based Design of line-of-sight control system using MATLAB/Simulink blockset and code generator tools for TMS320F2812 DSP is presented. This approach complete the control algorithm simulation and system architecture design using Simulink model, generates the executive code for DSP target with Real-time workshop and embedded coder. The effectiveness of this procedure from the analysis stage to real system implementation is experimentally verified.
Study of Sub-Synchronous Interaction in Doubly-Fed Wind Power Systems
Authors: Zhang Tao , Wang Xi Tian , Zhang Yang
Published: January 2015

When doubly fed wind power generation system transmits power to power grid through the series compensation, once the external disturbances is close to the natural sonant frequency, there is a trouble of synchronous oscillation between the rotor side and the series capacitor. The paper analyzes the condition of resonance and its mechanism. According the actual argument provide by north china wind power plant, we use PSCAD to build a 1.25MW doubly fed wind power generation model to analyze the synchronous oscillation. We adopt time-domain simulation method to analyze that as the change of series compensation degree the system subsynchronous resonance frequency changes as well as the influence to doubly fed fan current and power. The simulation result is basically the same as the fault wave record monitoring data result of actual site when wind power plant take off the network .Consequently to verify the validity of the simulation platform. To verify the improvement of the converter control strategy to build simulation platform.
Directional Transmission Based Optimization for the Hidden and Exposed Terminal Problems in Inter-Vehicular Communications
Authors: Sun Yan Qin , Yang Tian Cun , Qiao Zheng
Published: January 2015

The intrinsic problems of hidden/exposed terminal may bring about threat of conflict in inter-vehicular communication, and thus decrease network throughput. In this paper, we take the unidirectional feature of road into consideration, design single-channel transmission scheme for decreasing communication conflicts with position information and directional antenna, including the identification and notification of relative positions among adjacent nodes, the identification of node transmission state, and the method of directional transmission scheduling. By simulation experiments of inter-vehicular communication in NS-2, we verify that this scheme can discern the hidden/exposed terminal nodes and decrease conflicts effectively, and thus improve network performance.
Wireless Bridge Strain Data Acquisition System
Authors: Guo Xiao Peng
Published: January 2015

Bridge health monitoring has become an important means of transportation for bridge management, and the bridge strain is an important health detection index of bridge. In order to simplify the wiring complexity of test site, this paper aims to research a wireless bridge strain acquisition system based on Wheatstone bridge. The instrument can realize accurate acquisition of bridge strain data, then collects and transmits data remotely to the monitoring data processing system of PC through WIFI. This paper will make a detailed introduction of the system through two aspects of hardware and software.
Study of Organic Fluorine Modified Epoxy Acrylic Cathodic Electrodeposition Coatings
Authors: Li Tian Xia , Chen Feng
Published: January 2015

Due to the special nature of the fluorine atoms, the fluoropolymer has a spiral structure with C-C backbone was wraped by F atoms, protecting backbone from harsh environmental conditions, and maintain high stability.So fluorocarbon coatings have some incomparable unique properties,for example: low friction resistance, water repellency, oil repellency, non-flammable, etc., so that it has been applied in many applications, and get more and more attention of paint circles. The cationic fluorinated epoxy acrylic resin were synthesized by grafting appropriate acrylic monomers and organic fluorine onto epoxy resin.The impacts of fluorine amount ,grafting temperature,amination time and temperature were researched and the properties of the obtained paint films were tested. The results show that,in the appropriate electrophoresis parameters, the salt water ,aging resistance ,impact strength of film are improved compared with non-fluorinated ethylene acrlic paint.
A Novel Method of Cone Fitting Based on 3D Point Cloud
Authors: Deng Jun , Liu Gui Hua , Yue Li
Published: January 2015

The accuracy and stability of circular conical surface is easily influenced by the different distribution of noise and points in point cloud, when 3D point cloud data fits conical surface. For this reason, this paper proposes a novel method of establishing and optimizing the objective function with conical vertex. First, calculate the axis direction and half-apex angle of the cone; second, calculate conical vertex according to the result got in the first step; third, establish objective function with axis direction and half-apex angle and vertex, and optimize it with Levenberg-Marquardt. The method’s feasibility and robustness are verified by simulating and real experiments. The proposed algorithm has been successfully applied to a self-development 3D measuring system (TN 3DOMS) of Mianyang Saint Buffalo Technologies Limited Company.
3D Modeling of the Tower Head Based on ObjectARX
Authors: Yang Hai Ru , Chen Guo Zhi , Wang Hui Zhen , Li Liang
Published: January 2015

Elliptical head is an important standard part of the separation tower equipment. It can not be generated by tensile method, rotation method, because the rotation axis can not pass region. This paper introduces the ObjectARX programming environment. It describes how to build the menu and the dialog box. ObjectARX is a secondary development tool of AutoCAD. With its function and its mechanical drawing once learned, four arcs of ellipse can be used to build 3d modeling of head.of tower equipment. The ObjectARX programming technology is applied to develop AutoCAD, making it more convenient to darw the professional 3d graphics.
Intelligent Monitoring of Key Sections in Public Transportation
Authors: Wu Yong Wu , Wu You Fu , Fu Zu Feng , Qian Shu Qu
Published: January 2015

Behavior analysis is the advanced stage in intelligence surveillance. In this paper, we first parameterize the scene knowledge using Hough Transform and Polynomial fitting to boundary of road. The algorithm of Self-Adaptive Background Subtraction was cited in order to segment the moving objects; the features of improved Hu moment were used for classification; and the cordon was cited to realize the behavior analysis of moving objects. The experimental results show that our algorithm is effective.
Fault Diagnosis of Large Rotors Based on Wavelet Packet Neural Network
Authors: Zheng You Juan , Liao Ping , Qin Cai Long , Li Yu
Published: January 2015

Using wavelet packet neural network method which is consist of wavelet packet and BP neural network to diagnose large rotors by vibration signal .Firstly , according to the spectrum characteristic of large rotors’ common vibration fault ,using the improved wavelet packet method to compute the energy of the spectrum that can reflect the fault information .And then make the feature vector as the input to establish a model of improved wavelet packet neural network for fault diagnosis . Collect the data of five working conditions from the test bench , establish a improved wavelet packet neural network model, and then use the model to diagnose fault. The experimental results show that this method improves the accuracy obviously and calculate fast.