A New Test and Identification Method of MAV Electric Propulsion Unit
Department of Information Science, Beijing Institute of Technology University, Beijing 100081, China
Page No: 462-476
Abstract: Acquisition of accurate performance parameters in MAV electric propulsion unit was the precondition of designing flight control system. Established a test system on the basis of LabWindows/CVI for electric propulsion unit of MAV, also combined with MATLAB system identification toolbox, carried on the research of parameter identification. Supposed that the electric propulsion unit was a second-order object, provided a simplified SISO transfer function model. Conducted an online test for a certain type of electric propulsion unit, transmitted multi-channel data acquisition through the crossover cable to the computer, parsed out time variable dynamic curve of the thrust and torque. According to the test data, obtained the offline identification and online identification respectively. The experimental results showed that the test system of higher precision, real-time performance, lower cost, also added the function such as file transfer, dynamic display and rapid identification, which can replace traditional instruments for the test and identification of electric propulsion unit..
Keywords: MAV; electric propulsion unit; DAQ; test system; parameter identification
Page No: 477-493
Abstract: From a practical
perspective, the legislation of China EMS has three problems, including the
legislation system to be improved, some legislative contents conflicting with
one another and the authorization by the legislation not quite reasonable. In
reality, major problems of
Keywords: china environmental management system reform, legal safeguard, suggestions
on the New Mode Judicial Appraisal Management System in
Page No: 494-507
system of judicial appraisal is of vital importance in judicial system of
Keywords: judicial appraisal, management system, new mode
A Study on multistoried RC Framed Building and assessed the Real Strength Gained by the RC Elements
Swichily Alabasamil1 and
Page No: 508-519
Abstract: The paper analyses the deficiencies in the construction of a multistoried RC framed building and assessed the real strength gained by the RC elements like columns, beams and slabs. Nondestructive tests were conducted and representative cylindrical core samples were taken out from the RC elements and analyzed in the standard laboratory. The results compared with IS 456:2000 reveals that the major parts of slabs in ground, first and second floor from the RC elements in the structure are satisfying the minimum concrete grade M20. However, some of the columns in ground, first and second floor are not satisfying the minimum concrete grade M20 that required as per IS 456:2000. This structure requires immediate attention of strengthening the existing RC columns by adopting suitable rehabilitation techniques.
Keywords: field investigation, nondestructive tests, rebound hammer test, concrete core samples, strengthening of RC columns, restoration techniques
Corrosive Medium Temperature Effect on the Property Degradation of 90/10 Cu-Ni alloy
H.P Chen, B.L Dong, W.T Lou and W.F Zhang
& Technology Laboratory on Reliability & Environment Engineering,
Page No: 520-526
Abstract: Effect of corrosive medium temperature on performance degradation of 90/10 Cu-Ni alloy in seawater has been studied by potentiodynamic polarization and electrochemical impedance spectroscopy combined with surface morphology observation. The results show that, once the corrosion is stable, the impedance radius, charge transfer resistance and polarization resistance gradually increase with raising of corrosive medium temperature; in contrast, the corrosion potential, corrosion current density and corrosion rate decrease with the temperature increases.
Keywords: 90/10 Cu-Ni alloy, temperature, potentiodynamic polarization, electrochemical impedance spectroscpy
Two-step Weighed Least-square with Lagrange Multiplier for Hyperbolic Localization in Wireless Sensor Networks
Feng Yang, Hui Xiong, Hui Chen, Beiya Yang
School of Electronic Science and Engineering, National University of Defense Technology, 410073, Sanyi Ave, Kaifu District, Changsha, China
Page No: 527-542
Abstract: Hyperbolic localization based on Time Difference of Arrival (TDOA), is a widespread method for Wireless Sensor Networks (WSN) localization, and has its advantage in high accuracy, robust performance and low requirement for equipment. However, it always involves quite a problem in solving nonlinear over-determined equations. Two-step Weighed Least-square With Lagrange Multiplier (TWLS-WLM) proposed in this paper, deals with hyperbola’s polar coordinate formula, and converts localization into seeking polar angle and polar radius of curves’ intersection. Source node’s location is estimated in two steps: First, linearized equations concerning polar angles cosine and sine are obtained by using elimination method, then Least Square Estimation (LSE) of angular parameters is made with Lagrange method; Secondly, Weighed Least Square Estimation (WLSE) of polar radius is obtained by applying the estimated information of polar angle in hyperbola’s polar coordinate formula. This algorithm is theoretically iteration-free, and can provide analytical solution with moderate calculation. Simulation results show that it presents location estimate with relatively high accuracy, covers effectively beyond anchor-formed region, and especially serves well 2D hyperbolic localization in WSN.
Keywords: WSN, hyperbolic localization, TOA, WLSE, TWLS-WLM
The Process Analysis of Metal 3D Printing Technology
Fenghe Tao, Wanli Ma, Changzhi Jia, Jianchun Yang, Shuai Chen
Page No: 543-547
Abstract: Metal 3D printing technology is one additive manufacturing technology based on the principle of material accumulation. The process parameters of laser rapid prototyping was analyzed by orthogonal experimental. The optimal processing technology of 316L stainless steel was determined and Metallographic was analyzed.
Keywords: 3D printing, 316L, orthogonal experiment, metallographic
Design Optimization Control Techniques Including Soft Computing to Induction Motor Efficiency Optimization
Lizzie B Caesar
Dept. of EEE Jayaraj Annapackiam CSI College of Engineering, Nazareth, Tamilnadu, India
Page No: 548-564
Abstract: This paper presents a review of the developments in the field of efficiency optimization of scalar controlled drives through optimal control and design techniques. Optimal control covers both the broad approaches namely, loss model control (LMC) and search control (SC). Optimal design covers the design modifications of materials and construction in order to optimize efficiency of the motor.
Keywords: loss model control, search control optimal control
Kinematic Analysis on Bottle Distributing Mechanism of Pharmaceutical Filling Machine
Qinghong Han, Suohuai Zhang
School of Mechanical Engineering, Shanghai Institute of Technology, Shanghai, China
Page No: 565-575
Abstract: Plum petals mechanism is a new kind of bottle distributing mechanism, it is a clever combination of cam, gear and four-bar linkage, and makes the plum petals achieve a variety of motion states in a revolving cycle .This paper describes the technological process that plum petals divide the bottles, analyzes the transmission principle. And the relationship between polar radius of cam curve and angular velocity of plum petals has been achieved according to the establishment of kinematics equations, providing theoretical foundations for cam curve designs of the plum petals and the similar combination mechanisms. Through the motion simulation of the plum petals bottle distributing mechanism, the reason of the phenomena of bottles clamping and broken in the engineering application has been found out and the corresponding solutions also have been put forward.
Keywords: bottle distributing mechanism, combination mechanism, kinematic analysis
Research and Realization of Info-net Security Controlling System
Shuang Wang, Yu Lu, Liyun Chen
Equipment Command and Management Department, Ordnance Engineering College, Shijiazhuang, China
Page No: 576-582
Abstract: The thesis introduces some relative concepts about Network Cybernetics, and we design and realize a new info-net security controlling system based on Network Cybernetics. The system can control the endpoints, safely save files, encrypt communication, supervise actions of users and show security conditions, in order to realize full-scale security management. At last, we simulate the functions of the system. The results show, the system can ensure the controllability of users and devices, and supervise them real-time. The system can maximize the security of the network and users.
Keywords: information network, network control, controlling system, system simulation
An Overview of Unit Cell Used in Absorbers and Deriving Their Equivalent Circuit Based on Electric Field and Current Distribution
Bo Yi, Cheng Yang, Yangfei Dong, Chengxi Liu
College of Electronic Science and Engineering, National University of Defense Technology, ChangSha, Hunan, China
Page No: 583-594
Abstract: In recent three years, studying on absorptive/transmission frequency selective radome attracts many researchers’ eyes. This paper reviews different shape of frequency selective unit cell used in the absorptive/transmission frequency selective radome. The absorptive/transmissive frequency selective radome design method based on the impedance matching is introduced briefly. The unit cells of frequency selective surface studied in this paper include square loop, double square loop, incurved square loop and meanderline polarizer. Through simulation in CST MW Studio, electric field and current distribution on the metal strips are easily obtained and their equivalent circuits of different unit cells of frequency selective surface are derived. The values of the lump elements are calculated through fitting the transmission curve got by simulation in CST with the transmission curve got by lumped model in ADS.
Keywords: absorptive/transmission FSS, equivalent circuit, impedance match
Effect of Soil Interaction Emphasized by Comparing the Behavior of the Frame Obtained from the Experimental Analysis
Freeman S. Olga1, C. Trevelyan Elaine1 and Crichton Ryo Vincent2
1Department of Civil Bapatla Engineering College Andhra Pradesh, India
2Department of Civil National Institute of Technology Warangal, India
Page No: 595-602
Abstract: This paper presents the results of static load tests carried out on a model plane frame with plinth beam founded on pile groups embedded in the cohesionless soil (sand). The response of the superstructure considered include the displacements, rotations, shear forces and moments in the frame. Comparison of the interactive behavior from the experimental results has been made with the behavior from conventional method. Results revealed that the shear force and bending moment in the considerably because of soil interaction. It is also found that, as the rigidity of the plinth beam reduces the shear force and bending moment values from the experimental results have shown considerable reduction. The response of the system from the conventional method of analysis is always on higher side irrespective of level of loading which emphasizes the need for consideration of building frame-pile foundation-soil interaction and reduction of rigidity of plinth beam.
Keywords: plinth beam, rigidity, cohesionless soil
A Positioning Algorithm Based on RSSI
College of Information Engineering, Tongren University, Tongren, 554300, China
Page No: 603-607
Abstract: In complex indoor wireless environment, there are strong decline and multipath effect. Traditional GSM positioning and GPS positioning cannot perform well in indoor environment. At the same time, indoor positioning requires an acceptable precision in known little scope. In indoor environment, to measure RSSI (Received Signal Strength Indicator) as an index, using the algorithm based on distance or the distance model makes us easier to use and research. So it is of great importance to research the positioning algorithm applied in indoor positioning. At first, this paper introduces different positioning algorithms, and then provides the traditional algorithm based on RSSI, and lastly analyzes the improved positioning algorithm based on RSSI.
Keywords: RSSI, indoor positioning, positioning algorithm
The Boundary and Its Dynamic Consideration Research of Academic Critical Right and Scholar's Reputation
Ph.D. Candidate, Faculty of International Law, China University of Political Science and Law, Beijing, China
Page No: 608-618
Abstract: The service of the verdict of the first trial of Tianjin Heping District People's Court, Professor Shen Muzhu couple prosecutes (academic critical network) Professor Yang Yusheng, Professor Li Shidong, these prolonged reputation infringement dispute series case verdict have taken effect. It's the most visual to say that these series of case present confrontation between the scholar's reputation and academic criticism, its essence is that a kind of current judicial practice does not define rights of the legal status in fact– the subtle interaction of academic critical rights and scholar's reputation and the legal boundary between them. This not only involves legal boundary of the academic critical right, also relates to the legal boundary issues of scholar's reputation. Therefore, this article takes the nature of the academic critical right, the boundary between academic critical right and scholar's reputation, the identified standards of this boundary for theoretical discussion. At the same time, taking the verdict of the first trial in these series of case for example, the handling of related problems of written judgment and the author's comments are mixed in the argument process.
Keywords: scholar's reputation, academic critical right, boundary, dynamic considerations
Study on the Rural Folk Credit Financing of SMEs
School of finance&economics, Jiangsu University, Zhenjiang,China
Page No: 619-628
Abstract: Private capital has been an important basis for social and economic development, while private lending is an important flow of private capital, as a direct and flexible financing model, which is an important financing channels for SMEs for economic development has played a positive effect. But private lending in the enterprise actual production process there have been many problems, but still has not been officially recognized, the lack of legal protection, there is no legal status. SMEs are the main socio-economic development, development of SMEs are also increasingly valued by the people. Current SMEs, particularly SME financing status of rural economic development is also an urgent need to solve the problem, how to crack the private lending to small and medium enterprises financing difficulties brought new ideas. This paper describes the current situation in rural SME financing private lending, private lending SME financing further research reasons, and to explore the feasibility of private lending in rural SME financing, analysis of capital flows and use of problems that may occur and their causes finally, put forward the corresponding countermeasures.
Keywords: rural SMEs, private lending, reasons, solutions