bluuebunny/crossref_metadata_2025 huggingface dataset:
The Study on Homogeneous Parameters of Light Water Reactor by the Nodal Diffusion Method
Authors: Liu Zhi Bin , Ma Jin , Wang Bing Shu , Duan Xin Hui
Published: October 2014

Recent progress in the development of coarse-mesh nodal methods for the numerical solution of the neutron diffusion and transport equations is reviewed. Compared with earlier nodal simulators, more recent nodal diffusion methods are characterized by the systematic derivation of spatial coupling relationships which are entirely consistent with the multi-group diffusion equation. These relationships most often are derived by developing approximations to the one-dimensional equations obtained by integrating the multidimensional diffusion equation over directions transverse to each coordinate axis. The objective of this research is to develop accurate and efficient spatial homogenization method for coarse mesh analysis of light water reactors. More sophisticated methods for computing approximate equivalence parameters are also introduced and make use of nonlinear iterations between homogenized reactor calculations and local fixed-source calculations to compute equivalence parameters. This special feature induces the need for the study on homogeneous parameters of light water reactor which takes phenomena of different scale and their interaction into account by means of the nodal diffusion method.
The Applications of the Electron Beam Machining Technology in Research of Materials Science
Authors: Li Hang , Liu Hai Lang , Yu Hai Hua , Huang Yi Ping
Published: October 2014

Through introduction of the principle and characteristics of electron beam machining technology, the application status and application instance of electron beam in research of materials science and materials processing in recent years were introduced in detail. The research situation of the previous various electron beam machining methods and applications was discussed, and the various research results were analyzed, thus concluded that the emphasis and advantages of the electron beam machining technology in the application of various materials.
Design of the Production Line Control System of Beverage Filling Based on PLC
Authors: Hu Wei Wei , Chu Jian
Published: October 2014

PLC control program is simple and easy to use, reliable and so on. In the field of industrial automatic control has been widely used. Therefore, some characteristics of using PLC to design the beverage filling production line control system, in order to meet the requirements of control system. Through the introduction of automatic control of beverage filling, made us to have a deeper understanding for the beverage filling industry, also have a further understanding of the word for automatic control.
Automatic Control of the Electric Cross Sliding Welding Based on VC++
Authors: Qian Bing Feng , Ma Xi Pei
Published: October 2014

By controlling the electric cross sliding planes to achieve welding automation, Propose a VC++ based automatic control system. Based on electric electrical characteristics of cross slip planes, designed the hardware systems and control processes, use the VC++ software design a self-adjustment factor of Fuzzy-PID composite controller for control. Welding experiment had proved that the automatic tracking control result, and the result meets industry requirements.
Effect of Variation of Fuel Composition on Gas Turbine Off-Design Performance
Authors: Park Ye Suel , Park Saemi , Lee Joong Seong , Choi Gyung Min
Published: October 2014

The effects of fuel composition is investigated in a gas turbine for natural gas. Fuel composition is divided H/C ratio and heating value. There are three control schemes for gas turbine. In this study, TIT control and TET control is adopted. A full off-design analysis of the gas turbine was performed. Performance characteristics and maximum turbine blade temperature are the main interests. The power output is decreased while heating value of fuel is increased and H/C ratio of fuel is decreased both control scheme. As heating value of natural gas decreased and H/C ratio of fuel increased, turbine blade temperature is increased in TIT control. Otherwise, Blade metal temperature is little influenced by H/C ratio of fuel in TET control scheme.
Fault Diagnosis for Electrical Control System of Automobile Based on Support Vector Machine
Authors: Cao Jian Hua
Published: October 2014

This paper is to present a fault diagnosis method for electrical control system of automobile based on support vector machine. We collect the common fault states of electrical control system of automobile to analyze the fault diagnosis ability of electrical control system of automobile based on support vector machine. It can be seen that the accuracy of fault diagnosis for electrical control system of automobile by support vector machine is 92.31%; and the accuracy of fault diagnosis for electrical control system of automobile by BP neural network is 80.77%. The experimental results show that the accuracy of fault diagnosis for electrical control system of automobile of support vector machine is higher than that of BP neural network.
Stability and Robustness Analysis of a LASER Guided Missile System Using PID Controller
Authors: Polimera Mugdha Sunil , Kalaichelvi V.
Published: October 2014

A LASER Guided Missile System is used in most military operations for its known accuracy. But, a typical such system has a high order of non-linear characteristics and thus, a highly unstable performance. Such systems have a guidance and control system which acts as a flying servomechanism - an electromechanical device that positions an object according to a variable signal by reducing the error between two quantities. The guidance portion of the system develops the variable input signal. The input signal represents the desired course to the target. The missile control system operates to bring the missile onto the desired course. Thus, the output of the guidance and control system is the actual missile flight path. This paper dwells into the idea of using a PID Controller as part of the ‘control system’ in the missile, introducing stability in the system by reducing the error. The controller has been simulated using Simulink environment of MATLAB. The robustness of this PID controller, for different non-ideal environments, is tested post – tuning and is analysed based on performance criteria like overshoot, settling time etc.
Detection of Pedestrians in Motion with Rotation and Scale Variation
Authors: Ren Zi Cheng , Wahid Abdul , Choi Jae Ho
Published: October 2014

In this paper, a new framework for tracking non-rigid objects is introduced. By spatially masking the target with an isotropic kernel, a spatially smooth similarity function can be defined, and the target localization problem is then reduced to a search in the basin of attraction of this function. The smoothness of the similarity function allows for the application of a gradient optimization method by adopting a background weighted histogram. The proposed approach is effective for detecting objects in complex background and occlusion. Experimental results using various test videos containing objects in motion with rotation and scale changes show us superb detection accuracy over the conventional method.
Detection of Amaranthus palmeri sp. Seedlings in Vegetable Farms Using Genetic Algorithm Optimized Support Vector Machine
Authors: Wong W.K , Mariappan Muralindran , Chekima Ali , Nadarajan Manimehala , Khoo Brendan
Published: October 2014

This research is a part of a larger research scope to recognise individual weed species for weed scouting and spot weeding. Support Vector Machines are used to classify the presence of specified weeds(Amaranthus palmeri )by analysing the shape of the weeds. Weed leaves are extracted using image dilation and erosion methods. Several shape feature types were proposed and a total of 59 features were used as the feature pool. The feature selection and fine tuning of the Support Vector Machine are performed using Genetic Algorithm. The outcome is a generalised classifier that enables classification of weed leaves with an average of 90.5% classification rate.
Oscillation of Solutions to Second Order Stochastic Difference Equations
Authors: Zeng Jun Shan , Wang Ya Bo , Han Su Fang
Published: October 2014

In this paper, we provide the criterion of existence of oscillation solutions to the following second order stochastic difference equation (please see in body part)
Depth Analysis of ZigBee Protocol on Wireless Sensor-Actuator Network
Authors: Tao Tao , Tong Zhong Hua , Zheng Xiao , Wu Xuan Gou , Wei Lin Na
Published: October 2014

With the development of information technology, research and application of wireless sensor-actuator network is more and more widely. In this paper, the composition of wireless sensor-actuator network is described, the ZigBee protocol which is a wireless networking protocol is analyzed from multiple aspects in the network. Network architecture, protocol stack hierarchy, building network process, data transfer process, task approach based on ZigBee protocol are studied.
Teleoperation Scheduling Algorithm for Smart Grid Communications in LTE Network
Authors: Hajjawi Ayman , Hindia Mohammad Nour , Ismail Mahamod , Noordin Kamarul Ariffn , Dernaika Mohamad
Published: October 2014

This paper investigates the performance of three well-known algorithms namely Proportional Fairness, Exponential Proportional Fairness and Modified-Largest Weighted Delay First in LTE network. This study is based on their performance in three smart grid applications (Sub-Station Automation, Advance Metering Infrastructure and Wide Area Situational Awareness). In addition, a new mathematical model has been developed and proposed to target certain weakness of the above mentioned algorithms.
Numerical Study on the Fire Development Process of Typical Power Plant Multi-Floor Compartment
Authors: Ma Xin , He Wei , Ding Chao , Jiang Yong
Published: October 2014

About frequently happened fire accidents in Power stations, an actual compartment fire accident in one room on 3nd floor was studied numerically with software FDS 5.3.0/SMV 5.3.10 in this article. According to the results of simulation, we investigated the different radiant heat flux parameters, burning losses under different heat release rates and rising rates. The developing process of fuel combustion was analyzed. Also, we compared the simulation results with the actual smoke trace and burning rates in fire accidents. It shows the numerical modeling software FDS is a reliable tool to analyze the power plant fire accident caused by casually placed inflammable objects in single room. It provides an applied valuable good way for the fire accident research in power plant.
A Review of Exploitation, Utilization and Strategic Research of Nonmetallic Minerals in China
Authors: Ye Zhang Huang , Chen Li , Yan Qiang , Wang An Jian
Published: October 2014

The history of mineral consumption in developed countries indicates that the higher the development degree of one country is, the more significant role the nonmetallic minerals plays in the national economy, which our country will go through again. This paper hackles the development, utilization and strategic research of the nonmetallic minerals in china, on the basis of emerging industry plan and the high-tech industry development trend. The research hotspots have been further discussed in this field, which provides the direction for China from a country with rich nonmetallic mineral resources to a great power in quality.In the course of the human history, the nonmetallic minerals have played a significant part in it all along. The history of mineral consumption in developed countries makes it clear that the higher the development degree of a country is, the more significant role the nonmetallic minerals play in the national economy. Therefore, with a combination of the emerging industry and the high-tech industry, it is of great significance to have a review of the development, utilization and strategic research of the nonmetallic minerals in China.
Study on Rapid Aging Model of Bees and the Effects of Bee Fengbingkang Mistura on Rapid Aging Model of Anima
Authors: Miao Ming San , Wang Qian , Tang Chao Hui
Published: October 2014

Preliminary study of the feasibility that regarding honey bees as a new experimental animals the feasibility, and the establishment of bee rapid aging animal model and discuss the effects of bee fengbingkang Mistura on rapid aging model Through the appropriate high temperature, vibration environment of hypoxia, manufacturing honey bees rapid aging animal models, after pretreatment 7 days, respectively making mode to the Fengbingkang Mixture of large and small doses, the positive control group, the model control group. We find that after making model 4 hours, SOD,GSH-PX in whole body homogenate in bees, versus the normal group dropped significantly, combined with histopathological observations made show that with increasing die time, the increase degeneration in honey bee brain and intestine, it shows that model is successful. We create bee rapid aging successfully, with an indication that this drug can combat the bee rapid aging environment, for the future development lay a foundation.
Combustion Properties of Briquette Charcoal from Durian Peel
Authors: Hirunpraditkoon Samorn , Intharit Saravut , Srisumran Sineenat , Wongvirojtana Pairoj
Published: October 2014

This work aimed to use durian peel as raw material for producing bio-briquette charcoal by combustion and gasification. Briquette charcoal obtained was proposed as an alternative thermal energy for household. The producing process began from washing, drying and then pyrolyzing under carbonization by the designed drum dryer furnace. The pyrolyzed durian peels were crushed and grinded before densified in the designed extrusion briquette producing unit using tapioca starch as a binder. Durian peel briquette charcoals were mixed with starch binder in three different mass ratios of 70:30, 72.5:27.5 and 75:25. The results presented that the density of briquette charcoal was between 0.25 and 0.27 g cm-3. The heating value appeared to be decreased with an increase of the starch binder. Briquette charcoal from the ratio of 75:25 gave the maximum heating value of about 24,382 J g-1, which was approximately 81% of commercial coconut shell briquette charcoal. Fire combustion test showed that the combustion times of the durian peel briquette charcoals were between 2.3 and 2.4 h, which were slightly lower than value of the commercial briquette charcoal (2.85 h).
New Method to Harmonic Isolation Based on High Selectivity Filter to Control of Shunt Active Filter with Experimental Validation Using DSPACE System
Authors: Saleem Mohamed Muftah
Published: October 2014

This paper presents a new control method of a parallel active power filters based on improved harmonic isolation with hardware implementation. The harmonic isolator is based on High Selectivity Filters (it can be tuned at any frequency) and the current control technique consists in a modulated hysteresis current controller. This active filter is intended for harmonic compensation of a diode rectifier feeding a RL load. The study of the active filter control is divided in two parts. The first part deals with the harmonic isolator which generates the harmonic reference currents and is implemented into a DSPACE DS1104 prototyping card. The second part focuses on the generation of the switching pattern of the IGBTs of the inverter by the modulated hysteresis current controller, implemented into an analogue card. The use of High Selectivity Filters instead of classical extraction filters allows extracting directly the voltage and current fundamental components in the α-β axis at high performances. The effectiveness of the new proposed method is verified by computer simulation and by experimental study.
Studying Mechanical Properties Specially Fatigue Behavior of (Polyether Ether Ketone)/Glass Fiber Composites in Aerospace Applications
Authors: Najim A. Saad , Adwaa Mohammed
Published: October 2014

This work deals with studying the mechanical properties specially fatigue behavior for high performance composite materials of poly ether ether ketone (PEEK)/glass fiber, which are used in Aircraft Industry. Two materials have been used: (PEEK natural) and (PEEK+30% glass fiber).To identify the type of (PEEK), infrared (FTIR) test has been conducted. X-ray test has been used to measure the (PEEK) crystalline ,also the tensile properties, impact strength and the fatigue test are performed.The results show that FTIR test peaks are for standard PEEK polymer and that GFRP increases the crystalline of (PEEK) material , while the tensile , impact and fatigue properties of (PEEK) decreases by adding GF to PEEK .
Design and Analysis of a Fibonacci Switched-Capacitor DC-AC Inverter
Authors: Eguchi Kei , Zhang Ya Nan , Fujimoto Kuniaki , Sasaki Hirofumi
Published: October 2014

For small power applications, a Fibonacci switched-capacitor (SC) DC-AC inverter is proposed in this paper. Unlike common DC-AC inverter containing inductors or transformers, the proposed inverter requires no magnetic components. In the proposed inverter, bi-directional switches are controlled so that the voltage ratio of capacitors becomes the ratio of a Fibonacci number. By combining some of these capacitors in series, the proposed inverter generates a staircase AC waveform formed by many steps. Therefore, unlike the conventional SC DC-AC inverters based on a series-parallel type converter, the proposed inverter can provide the staircase AC waveform by a smaller number of capacitors. The theoretical analysis and simulation program with integrated circuit emphasis (SPICE) simulations show the effectiveness of the proposed inverter.
Design of High-Resolution FPD System Based on Doglegged Sampling
Authors: Zhang Bao Long , Wang Jing Yun
Published: October 2014

For the shortcomings of methods used to improve the image spatial resolution of current linear charge coupled device (CCD) FPD System, a new sampling method is proposed, and a high-resolution FPD System is designed. Two same linear CCD cameras arc fixed with specific spatial arrangement, namely both camera 1 and camera 2's CCD scan the object with a tilt angle B, and image correction and pixel interpolation arc also used for getting high-resolution image. The experimental results show that, compared with the regular scanning mode equipped with a signal camera and =0¡ã, in our method cameras with slant angle =60¡ãenables the image spatial resolution doubled, and keeps the field of view unchanging. It is easy to realize the designed system in engineering, very economical and convenient to maintain it, and only using the existing imaging device to obtain higher-resolution images.
Tensile Properties of Semi-Solid Die Cast AC4C Aluminum Alloy
Authors: Shi Ke Ren , Wisutmethangoon Sirikul , Wannasin Jessada , Plookphol Thawatchai
Published: October 2014

In this study, semi-solid Al-Mg-Si alloy (AC4C) was produced by using the Gas Induced Semi-Solid (GISS) die casting process. The tensile strength and ductility of the semi-solid die cast Al alloy (GISS-DC) after T6 heat treatment were investigated and compared with those of the conventional liquid die casting (CLDC). The microstructures of GISS-DC and CLDC observed by an optical microscopy were presented. The ultimate tensile strength (UTS) and yield strength (0.2% YS) of GISS-DC are compatible with those of the CLDC. However, the GISS-DC has better ductility than the CLDC, this may be due to the smaller and more globular primary α-Al phase and rounder shaped-Si particle microstructures presented in the GISS-DC. Common shrinkage pores and defects were also observed by SEM from the fracture surfaces of both alloys.
Surface Roughness and Grain Size Analysis of Treated Indium Tin Oxide(ITO)Film
Authors: Retnasamy Vithyacharan , Sauli Zaliman , Taniselass Steven , Ahmad Norhawati , Keng Chai Jee , Kamarudin Hussin
Published: October 2014

An initial study has been conducted to characterize the surface morphology of treated Indium Tin Oxide (ITO). Treatment done is annealing process where the samples are put through heat and annealed for an hour. Time of deposition and layers of ITO has been varied to study the correlation between both.The treated ITO are examined under Atomic Force Microscopy (AFM) for the surface roughness and the grain size. Results shows that deposition time of ITO do play an important role in determining a desired grain size in ITO material.
Effects of Patch Geometrical Parameters on Mechanical Properties of Damaged Metallic Structure Repaired with Adhesively Bonded Composite Patch
Authors: Zhou Kai , Zhang Ding , Wang Hai Dong
Published: October 2014

Composite patch adhesively bonded repair is an advanced repairing method for damaged metallic structure, and in patch designing, it is important to choose appropriate geometrical parameters, which decides mechanical properties of repaired structure. Based on 3D FEM, the model of aluminum plate with a central through crack adhesively bonded repaired with carbon/epoxy composite patch was established, which can take into account residual thermal stress and bending deformation caused by differences of thermal expansion coefficient. SIF was calculated using virtual crack closure technology and compared to evaluate effects of patch geometrical parameters on mechanical properties of repaired structure. The results show that there is optimal patch length and thickness which can make best repairing effect and an effective patch width can reduce SIF significantly, beyond which it is helpless.
Review of Studies on the Seismic Behavior of Composite Shear Walls with Double Steel Plates and Filled Concrete
Authors: Zhang You Jia , Liu Wei Xing , Shao Xiao Shuang
Published: October 2014

This paper points out the characteristics of composite shear walls with double steel plates and filled concrete and composite structure force mechanism. This paper briefly expounds the present situation of the research on the seismic behavior of composite shear walls with double steel plates and filled concrete from four aspects including structural experiments, calculating method , calculating theory and local stability, and analyzes the shortcomings in the research. After comparing many achievements, this paper puts forward several key problems in the research of seismic behavior of composite shear walls with double steel plates and filled concrete. Finally, the development of the seismic behavior of composite shear walls with double steel plates and filled concrete is prospected.
Analysis on the Couple Field of Fixed Tube-Sheet Heat Exchanger
Authors: Xu Yan Ling , Chen Wei You , Yang Qing Wen
Published: October 2014

Based on ANSYS, a finite elements method study is conducted on couple fields of fixed tube-sheet heat exchanger. On the basis on the calculating results, the paper tries to analyze and evaluate the reliability and parameter sensitivity of the couple field of fixed tube-sheet heat exchanger, so as to present references for the reliable design on the intensity of mechanical equipments.
Parallel Green Design of Machine Product
Authors: Zhang Bao , Jiang Tian He , Chen Chuan Hai
Published: October 2014

Concurrent green design of machine product proposed concurrent engineering method in the process of product design, reflect the green design idea, realize concurrent engineering and green design information sharing, so as to shorten developing period, reduce cost, enhance quality and protect environment. Connotation, basic characteristic and key technology about concurrent green design are discussed in the paper.
Research on Rolling Element Bearing Fault Diagnosis Based on EEMD and Correlated Kurtosis
Authors: Wang Xiao Lin , Han Wei Hua , Gu Han , Hu Cun , Han Xing Xing
Published: October 2014

In order to extract the faint fault information from complicated vibration signal of bearing, the correlated kurtosis is introduced into the field of rolling bearing fault diagnosis. Combined with ensemble empirical mode decomposition (EEMD) and correlated kurtosis, a feature extraction method is proposed. According to the method, by EEMD processing a group of intrinsic mode functions (IMFs) are obtained, then the IMF with maximal correlated kurtosis is selected, and the weak fault signal is clearly extracted. The effectiveness of the method is demonstrated on both simulated signal and actual data.
Flexural Capacity of Plate Girders with Corrugated Webs Strengthened with Angles
Authors: Lho Seung Hee , Park Man Woo , Ju Young K. , Kim Sang Dae
Published: October 2014

Plate girders with corrugated webs with angles were developed in order to promote the flange local buckling strength of conventional plate girders with corrugated webs. The width to thickness ratio of flanges can be reduced with angles. However corrugated webs cannot contribute to the flexural stiffness and strength of PGCW, corrugated webs of PGCW-A can. A full-scale test was conducted to evaluate the flexural capacity of PGCW-A. As a result, the flexural capacity of a specimen of PGCW-A increased by 163% compared to a specimen of PGCW.
Natural Frequencies of Functionally Graded Beams by the Various Shear Deformation Theories
Authors: Wu Jiang , Xiang Song
Published: October 2014

Various higher order shear deformation theories of Levinson, Touratier, Karama are utilized to calculate the natural frequencies of functionally graded beams. The governing differential equations are solved by an analytical method. The present results are compared with the results of Aydogdu which demonstrate the accuracy of various theories.
The Analysis of Finite Element about the Interaction between Seasonal Frozen Soil and Tower Pile Foundation
Authors: Gan Feng Lin , Zhao Di
Published: October 2014

In the northern frozen-soil region,the heaving soil’s low temperature is the key factor that impacts the stability of foundation. This paper makes the heat-stress coupled numerical analysis on the cold expansion effect of the pile foundation to the Ulanhot-Baicheng 500kV transmission line engineering by finite element software ABAQUS. Firstly, the seasonal frozen soil’s temperature field should be calculated. Then, the temperature value acting as the temperature model’s initial condition is put into the structure model for computation, which can help to get the pile foundation’s stress field and strain field. The results show that, the stress state of pile-frozen soil under external load can be reflected accurately through the finite element model and the related parameters proposed, along with the finite element software.
Comparative Analysis of Bearing Capacity of Inclined and Vertical Excavated Foundation
Authors: Chen Rong , Liu He Feng , Hao Dong Xue , Wang Zhi Yun
Published: October 2014

Excavated foundation has widely used in the field of transmission line engineering because of its large capacity to resist uplift and moment force. Elastic-plastic numerical model were established by using the finite element software ABAQUS focusing on the difference of bearing characteristics of inclined and vertical excavated foundation. There is very slight difference of axial uplift resistances between the both foundations because almost the same soil mass are mobilized at the same displacement loading. However, failure modes and horizontal resistances of negative, positive and vertical foundations are very different. The larger soil mass along the shaft of negative foundation is mobilized than positive and vertical foundations. The uplift resistances of vertical and negative foundations are about 5% and 25% higher than positive foundation at horizontal displacement of 50mm respectively.
Study on Random Vibration Response Analysis for the Sphere Cylinder Assembly in Aerospace Vehicle
Authors: Sun De Lin , Zhao Zhe , He Kun , Liao Ri Dong
Published: October 2014

To assess the structural strength of spherical cylinder, the finite element model was constructed by the NX NASTRAN software. Firstly,the basic principle of random vibration response analysis was introduced, then the random vibration response analysis of the cylinder assembly was analyzed. The simulation result shows that the stress of the joint between spherical cylinder clamp and the base is larger than other areas in conditions of a given random vibration load. The spherical cylinder structure is safe and that the maximum RMS stress is about 20 MPa.
Theoretical Modeling of Pressure Force for CFRP Laminated Plate Interference-Fit Joining
Authors: Liu Ping , Du Kun Peng , Li Wan Li
Published: October 2014

CFRP has been commonly used in aeronautic and astronautic structures. However, for the character of anisotropy and low interlaminar strength, mechanical joint (such as bolted connection) process’s mechanical behavior for CFRP laminated structure is complicate, and the process parameters of bolt joining is the basis of structural reliability and safety design. In this article, Bolt installation process was analyzed, and theoretical model of pressure force for CFRP laminated plate interference-fit joining has been established.
Development of Droplets Penetrating Roots Performance Test Device and Tests Applied this Device in Ultrasonic Aeroponic System
Authors: Teng Yue , Gao Jian Min , Liu Chang Jian
Published: October 2014

Extremely flourishing roots of aeroponic plant lead droplets difficult to penetrate into the core of roots. This phenomenon is so-called “external is wet but internal is dry” and seriously affects areoponic efficiency, even result in aeroponic culture failure. In order to research droplets penetrating roots performance in ultrasonic aeroponic system, an intelligent test device was developed. This device included two ultrasonic nozzles whose working frequencies were 1.7MHz and 40kHz respectively, nozzles’ drive circuit, acquisition system of humidity and temperature based on ARM 9.0 and axial flow fan. The following conclusions were suggested: under the mature cherry tomatoes root system density cultured in aeroponic system, droplets generated by 1.7MHz ultrasonic atomizing nozzle were easier to penetrate into the core of the root; both size and concentration of droplets influenced droplets penetrating into the root; when 1.7MHz nozzle was used to atomization, the best penetrating condition was found in supply air rate 0.021and spray volume 0.4L/h; for 40kHz atomizing nozzle , the best penetrating condition was found in supply air rate 0.021and spray volume 1.2L/h; for 1.7MHz nozzle the worst work conditions of penetrating into the root were that supply air rate was 0.014and spray volume was 0.8L/h and for 40kHz nozzle that was supply air rate 0.033and spray volume 1.2L/h.
Simulation and Experimental Investigation of Springback in Air V-Bending Process Using Finite Element Method (FEM)
Authors: Buang Muhamad Sani , Abdullah Shahrul Azam , Saedon Juri
Published: October 2014

This paper presents an investigation on cold bending process using simulation and experimental study. The experimental and simulation was performed on stainless steel 304 sheet metal in air V-bending. The factors involved in the process are punch radius, die radius, die gap, punch travel and punch velocity. The aim of this paper is to investigate the factors that affect the springback behavior of stainless steel in air V-bending using Finite Element Method (FEM) software Simufact-FormingTM version 11.0 and material database MatILDa. The simulation parameters followed the actual setting under consideration of the machine characteristic and friction. The simufact.formingTM simulation was further verified using hydraulic press machine with determine the desired speed of the forming punch. As the final result, comparison effect of springback between simulation and experiment is presented. It can be concluded that Simufact.formingTM software can gave fast solution analysis time in prediction of springback affact with good agreement between simulation and experimental.
Kinematics Modelling and Simulation of Aero-Engine Fuel Piston Pump
Authors: Fu Jiang Feng , Li Hua Cong , Li Jia , Wang Shu Hong
Published: October 2014

Kinematics parameters calculation is the basis of piston pump design and performance analysis. Taking an axial piston pump with incline piston and spherical swash plate as the research object, Aimed at the deficiency of current formula for calculating piston pump kinematics parameters which included displacement, velocity and acceleration. In this paper, according to piston pump part motion geometry relationship, a correction kinematics algorithm is deduced by using the the spherical coordinate and cartesian coordinate transformation method, the analyse method and deduction procedure ensure the new calculating formula are precise in theory. Applying the calculating formula to an aero engine fuel axial piston pump, results show that. The displacement, velocity, acceleration according to the kinematics principle of piston pump, it can be used in the kind of piston pump kinematics parameters calculation and current calculating method evaluation.
Positional Accuracy Based on a Load Identification Optimization on a Linear Motor Sheet Forming Feeder
Authors: Kasim Nazrul Idzham , Razali Akhtar Razul , Musa Mohd Azam
Published: October 2014

Precision feeding is essential for micro-stamping, especially in multi-stage progressive forming operations, where necessary feeding rates also have to be maintained. Research in micro-stamping of thinner sheet metals (<100 microns) led to investigations of the performance of existing sheet-metal feeders, regarding their accuracy and repeatability in high speed micro-stamping. The results indicated that the pursuance of higher feeding accuracy and repeatability which aimed at 5-15% of the strip thickness was unachievable with the existing micro-feeders. A new high-precision and high-speed feeder was, therefore, developed for micro-sheet-forming. Initial non-optimized experimental results had showed high accuracy and repeatability were achieved.
Dynamic Analysis and Balance Design for a Constant Temperature Oscillator Based on ADAMS
Authors: Tao Qing , Feng Zhi Hua , Lei Ming , Wang Zhen Ming
Published: October 2014

In this paper the rigid-flexible coupling dynamic characteristics for an existing constant temperature oscillator based on ADAMS has been investigated. The unbalance load caused by the rotation of the eccentric mass is carefully calculated. In view of this phenomenon, a new centroid adjustable balancing head is put forward, and the scheme is verified by ADAMS.
Punching Automatic Line Served by a Portal Robot
Authors: Patic Paul Ciprian , Pascale Lucia , Măntescu Gabriela
Published: October 2014

In this paper one tried to realize an automated system based on PIC16F84 microcontroller and several sensors, a punching automatic line, served by a portal robot type that can be modified and adapted to a variety of technology processes, which requires series production.
Research on the Model of Pneumatic Servo Mechanism Controlled by Pulse Width Modulation
Authors: Zhang Dong Xu , Yang Zhong , Yang Zhi
Published: October 2014

According to the working condition and characters of pneumatic servo system, the mathematic model of switching valve and executing cylinder controlled by pulse width modulation were built. The mathematic model was made use of in the flow regulator used on gas generator and the simulation model was built with Simulink in Matlab. According to the simulation model, the dynamic characteristic was analyzed.
Research of Subway Electro-Pneumatic Brake Force Distribution Strategies
Authors: Wu Meng Ling , Wu Lei Zhi , Li Yun Feng , Tian Chun
Published: October 2014

Through the investigation of some problems of subway, that is, abnormal wheel tread wear and excessive brake shoe abrasion, caused by applying irrational electro-pneumatic brake force distribution strategies in the quotidian operation subway lines, a braking system simulation platform based on AMESim is established in order to point out the pros and cons of various distribution strategies, such as diverse converting points of electric and pneumatic braking, assorted pneumatic brake force distribution methods; the indexes include brake shoe pressure and imposed time of pneumatic braking; service brake and emergency brake are regarded.
Method of Numerical Simulation of a Centrifugal Separator for Cleaning Petroleum Products
Authors: Vatin Nikolai , Nemova Darya , Kharkov Nikita
Published: October 2014

The method of numerical simulation of the centrifugal separator is presented. The separator carries out alternative way of mechanical cleaning petroleum products from inclusions of water and sludge. Questions of the boundary conditions, creation of a settlement mesh and a method of calculation of two-phase liquid are considered.
Estimation of Uplift Capacity of Excavated Foundation of Transmission Lines
Authors: Hao Dong Xue , Gao Yu Cong , Chen Rong
Published: October 2014

Finite element model for the system of foundation and its surrounding homogeneous soil is established based on software ABAQUS to analyze the uplift behavior of excavated foundation of transmission lines. The influence of soil properties and embedment ratio were analyzed. Deep mode occurs when embedment ratio is more than 4. As for shallow mode, the shearing method based on cylinder sliding surface was used to estimate uplift capacity. The expression of nominal uplift coefficient of earth pressure Ku in the formula was determined via back-calculation and fitting, which is the function of embedment ratio, friction angle and cohesion simultaneously. The errors of uplift capacity from fitting formula and numerical analysis are all within 15%.
Application of Cement Soil Mixing Pile for Transmission Line
Authors: Xiao Qi , Yan Bin , Du Guo Liang
Published: October 2014

The mechanism of soil liquefaction and the principle of enclosure method treating subgrade liquefaction are elaborated in this paper.It proves that the grid type cement soil mixing pile enclosing foundation can eliminate liquefaction based on amounts of datum and engineering case.And the means of design and construction are summarized.
Multi-Scale Analysis of the UHVDC Transmission Tower
Authors: Liu Chun Cheng , Li Wen Qiang , Hou Shang Yu , He Zhao Wen , Gao Fan
Published: October 2014

In order to analyze the mechanical properties of UHVDC transmission tower joint accurately, a multi-scale finite element model of the transmission tower is established with the interface between solid element model and beam element model. The model is applied to the nonlinear analysis of a key joint in a test condition .The results show that the tower destruction is caused by buckling behavior of the cross bracing member and the multi-scale model can simulate the force state of gusset-plate and the connected members realistically, which is superior to traditional large scale models. The analysis coincides with the experiment well and provides references for the transmission tower design.
The Transmission Tower with Angles Composed by the Variable Cross-Section is Studied Modal Analysis and Secondary Stress
Authors: Qin Li , Yu Guo Rong
Published: October 2014

In order to study the mechanical properties of the angle variable cross-section transmission tower against the corner of a 500kV transmission line tower, it becomes a node by node plate tower slope at a single angle and dual angle connected to a total of ten bars, dozens of bolts. The entire tower was built finite element model, the model is modal analysis, the results of the analysis of compliance with regulatory requirements. In the most unfavorable conditions, the tower each node variable slope rod internal forces are extracted, come times of stress accounted main material angle of principal stress ratio is large, need to be considered in the design.
UHV KZ185 Crossing Tower Stress Analysis
Authors: Kong Wei , Wu Lin
Published: October 2014

In terms of structure design for transmission towers, early because of restricted by calculation method, are generally will tower inner force analysis that was decomposed into several pieces of plane truss. This method omits truss space effect, is a kind of approximate calculation method. Later adopted a more accurate method of space truss, considering the relations between the deformation coordination of bar of tower structure and the mechanical equilibrium conditions, can reflect the actual situation of the tower stress relatively and accurately. The above calculation method, both plane truss method and method of space truss all nodes are assumed to be the ideal of articulated point, ignoring the interaction of the influence of secondary moment and torque to the structure. In recent years, with the rising of power grids, high voltage, large capacity of transmission lines construction become the trend of the development of the grid technology. Gradually to develop in the direction of high, long-span transmission tower, component cross section increases gradually, the second-order stress effect on the structure is becoming more and more important. The truss method in some special structure and the adaptability of complex working conditions should be tested by experiment and other finite element calculation software review.
The Influence of Geometry of Pedestal Piles in Silt on Uplift Behavior
Authors: Hao Dong Xue , Zhang Jin Zhong , Chen Rong
Published: October 2014

The uplift behavior of rigid pedestal pile is affected by the geometry, which is not totally same with plate anchor. A series of uplift tests of relatively large scale pile models with various dimensions in silt soil have been conducted to investigate the influence of angles of enlarged base, ratio of base and shaft diameters and embedment ratios. The whole trend is that uplift capacity will decrease with the increase of angle of enlarged base. The maximum difference of ultimate uplift load for various angles of enlarged base is within 20%. Soil surrounding pile base can be mobilized when ratio of base and shaft diameters is no less than 2.0, otherwise the part of enlarged base will not take effect fully. A gently curved rupture surface emerged from the edge of enlarged base to soil surface when embedment ratio is no more than 3. For deep rigid pedestal pile, a balloon-shaped rupture surface occurred. The height of whole rupture is 2.7D.
Research on Green Machine Product Design Evaluate System Based on AHP
Authors: Yang Lang Tao , Zhang Bao , Jiang Tian He
Published: October 2014

Basing on the basic attributes of the green machine product, the article put forward the main principles that should to be abided, when construct the synthesis evaluate index system. Then use the AHP method in analyzing the choice approach of the green machine product`s design scheme.
Green machine product means that in its whole life process (including material gaining, designing, manufacturing, packing, transiting, using, recycle, reusing or refilling), we can economize the energy, do little or minimum damage to the environment, protect the worker well. It has four characteristics including technology advancement, economic, resource saving and environment friendliness. Green machine product design is to make sure that it can influence the environment less and keep its basic functions, service life and quality. Its green degree play an important role in judging whether or not it can meet the green product’s basic requirements and improving its design project and produce technology.
The Glucose-Sensitive Nanocarrier Based on Phenylboronic Acid
Authors: Zhao Li , Wang Li Yan , Gai Guang Qing
Published: October 2014

Recently, diabetes mellitus has become one of the most serious diseases that threat to human health and even life following cancer and cardiovascular disease. Thus, the developments of efficient insulin administration exhibit great practical significance. However, insulin, which could low blood concentration rapidly, cannot be oral delivery due to very low oral bioavailability for the pure absorption through the gastrointestinal epithelium as well as the rapid hydrolytic and enzymatic degradation in contact with the gastrointestinal fluids. While the frequent administration of exogenous insulin by injection everyday is not perfect due to the inevitable pain, which will cause inflammation, lumps and nodules. In recently, the glucose-responsive insulin delivery system (GRIDS) is developing rapidly which not only has high bioavailability of insulin but also extenuates the pain of diabetics caused by frequent insulin injection. GRIDS is expected to be a promising therapy approach to replace the frequent insulin injection administration. Therefore, the exploited intelligent glucose-responsive insulin delivery system has significant practical application for diabetes treatment.
Exhibition Pavilions Car Showrooms Based on Translucent Structures: Providing Microclimatic Comfort for Clients
Authors: Pukhkal Viktor , Stanojevic Darko , Murgul Vera , Vatin Nikolay
Published: October 2014

Transition to a new approach related to use of facades and roofs entirely made of glass in pavilions car showrooms construction called for an additional analysis to evaluate an issue of how to ensure an interior climate. There was a need to have solutions generalized and systematized with the aim to ensure human comfort in pavilions with large glazed areas in facades and roofs. Exhibition pavilions car showrooms based on translucent structures were taken for consideration. General data concerning temperature conditions for the rooms and internal glazing surfaces of pavilions car showrooms based on translucent structures are stated herein. Pertinent information for glazing design is given with due account for winter maintenance conditions in regard to the pavilions car showrooms having significant areas of façade or roof glazing.
Glazing Design for Exhibition Pavilions Based on Translucent Structures under Winter Conditions during Cold Periods
Authors: Vuksanovic Dusan , Nikitin Yury , Murgul Vera , Vatin Nikolay , Pukhkal Viktor
Published: October 2014

Transition to a new approach related to use of facades and roofs entirely made of glass in building construction called for an additional analysis to evaluate an issue of how to ensure an interior climate. In the article have been investigated the factors, which make people feel uncomfortable in the pavilions with large glazing areas: cold air flow near glazing area, which occurs on the cold surfaces of the windows, going down and along the floor, radiation heat exchange between human beings and building envelopes, condensation on internal glazing surfaces.
Classification Modeling of Parts for Complex Machinery Product Based on Design Structure Matrix
Authors: Wan Wei Hong , Xu Jing , Chen Ping Lu , Liu Mu Hua
Published: October 2014

In order to reuse existing resources effectively and meet the specific demands of different users, it is necessary to study the classification modeling methods of parts for guiding product design and improving product quality. Firstly, the hierarchy theories of classification modeling are analyzed based on Design Structure Matrix (DSM). Then, the process of classification modeling is presented for parts of complex machinery product based on DSM modeling method. Meanwhile, the steps and notes to build classification structure were described in details. The results show that the theories and methods presented in this article could provid guidances for classification modeling of parts and realize efficient reuse and quick retrieval of product data for complex machinery manufactories.