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This paper proposes a new method combing the Six-phase permanent magnet synchronous generation (PMSG) with 12-pulse series diode rectifier with active harmonic elimination at DC side in order to improve the quality of the ac line currents. The proposed scheme draws nearly sinusoidal currents by controlling the two sets of diode bridge output currents to be triangular and out of phase using the active PWM auxiliary circuit injects directly compensation currents at DC side. The compensation strategy is analyzed. The simulation results demonstrate that the 11th 13th current harmonic in the Six-PMSG stator currents basically are eliminated, with multiply 5th, 7th harmonic content. But the total harmonic distortion (THD) of the Six-PMSG resultant current can be close to 1%.

Crowdsourced mobile video streaming enables nearby mobile video users to aggregate their network resources to improve the video streaming performance. However, users are often selfish and may not be willing to cooperate without proper incentives. Designing an incentive mechanism for such a scenario is challenging due to the users' asynchronous downloading behaviors as well as their private valuations for multi-bitrate encoded videos. In this work, we propose a multi-object multi-dimensional auction-based incentive framework, through which users can download multiple video segments with different bitrates for multiple nearby users (and themselves). Based on this incentive framework, we propose a Vickrey-score auction, which is the first multi-object multi-dimensional auction that achieves both truthfulness and efficiency. Simulations with real traces show that crowdsourced mobile streaming outperforms noncooperative streaming by 48.6% (on average) in terms of social welfare. We further implement our proposed auction mechanism in a demostration system, and show that the crowdsourced framework together with the auction mechanism can substantially increase mobile user's welfare and video service stability.

Wet flue gas desulfurization system is a desulfurization process which reduces flue gas SO 2 content by acid-base reaction and PH value is the main control parameter. Since the system possesses time-varying, large inertia and nonlinear characteristics, the traditional PID algorithm is difficult to obtain satisfactory results in condition that a high demand of steady-state performance and control accuracy. So this paper proposed the method of RBF neural network online tuning PID control. The PID control is simple and easy to be used. The RBF network can tune PID parameters in real time based on the change of object parameters. The method combines both methods. The simulation results show that RBF neural network PID controller is better than the traditional PID controller, in the control effect of the system. It has a small amount of overshoot, short adjusting time and strong robustness, etc.

Brushless DC motor has many sorts of problems in practice, for example, the most prominent are large overshoot and adjustment time is long. In this paper, a controller is proposed to solve these problems. Firstly, the structure and the working principle of BLDCM are analyzed. The double closed loop speed regulation system is simulated, including the speed loop with PI control, fuzzy adaptive PID control simulation, and disadvantages analysis. According to the theory of variable domain thoughts, the variable universe fuzzy adaptive PID control system is presented. Particle swarm optimization (PSO) algorithm is applied to identify the optimal scaling factor. The experimental results show that the variable universe fuzzy adaptive PID control system used in the speed loop has faster response speed and precision in MatLab environment. Our proposed model has good adaptive ability.

In this paper, designed the slip motor speed control system for packing rubber strip which is used in plastic steel door and window. The system, 32-bit embedded microprocessor LPC2136 as the control core, PWM speed control, velocity feedback from tachogenerator, rubber strip position feedback from the CMOS camera, has proved that CMOS camera's image quality meets the engineering requirement; Slip motor speed is in the precision of 1 percent in scope of 0 to 1400rpm. Practical application shows that the system is reliable, stable and higher precision of control. The system design provides reference for similar control system and builds the basis for the design of intelligent control system.

In order to improve the resolution and enhance the impact resistance and vibration resistance of encoders, a novel absolute metal rotary encoder based on Single-track Periodic Gray Code is presented. The configuration and working principle of the encoder is introduced, and then the metal code disc which can realize full scale absolute encoding on one single track and its corresponding metal slit disc are proposed. Finally, the data acquisition and processing system based on FPGA of encoder is presented. The resolution of the encoder can reach 5.27iåthrough electronic subdivision and calibration between the precision code and the coarse code with its volume only f48×40mm. The encoder has some advantages such as small volume, low cost, high resolution and strong impact resistance.

This article is based on the rapid development of cultural industries and the establishment of the Cultural Assets and Equity Exchange. Cultural Assets and Equity Exchange secured transactions function as an intermediary platform, and the introduction of VAR model exploratory analysis of the pricing issues of cultural property transactions secured transactions, so as to make quantification of the exchange-traded risk of cultural property as a security platform. The purpose of implements the cultural industry risk management is to prevent loss occurs before accident, mitigate the loss in accident, and compensate the loss after accident. The establishment of an effective risk control mechanism is extremely important to the rise of cultural industries. Sound risk control mechanism for the cultural industry should include the prevention and control strategies, subjects, and means.

2-Butaneone was synthesized from pinacol rearrangement of 2,3-butanediol (BDL) dehydration by using a cleaner and more environment benign approcah, which reaction systhem was in near-critical water (NCW). The result showed that the addition of carbon dioxide was benefit for the conversiotn of BDL while was not advantageous for the yeild of 2-butaneone. According the experimental results, the mechanism of dehydration of BDL in NCW was proposed.

How can we explain the oriental promotion system, especially in China? It seems that the best individuals fail to obtain the positions in many cases. However, some ordinary people with outstanding performances are chosen and become more and more important in business groups. Can it be explained and can the principle be built? In this study, a set of concepts and models inspired by social network are proposed as tools which aim to be decision-making principles in human resource management. Moreover, the studies are demonstrated by simulation. However, it is only a start in this period. Some novel questions and plans are proposed for future study.

In order to enhance the resolution of Charge Coupled Device(CCD)pixel with the pixel dimension and focal length of optical system unchanged, the problem of CCD geometric superresolution is educed. The problem is discussed in terms of software and hardware. In software, the bicubic interpolation is introduced, while in hardware, the subpixel imaging method is utilized. The subpixel imaging method integrates two uniform linear CCDs staggered by half dimension of pixel in one device. In operation, the line frequency is doubled. At last, the collected data is interweaved to synthesize a high resolution image. The two methods, bicubic interpolation and subpixel imaging, are simulated with Matlab7.0.1. The qualitative and quantitative analyses are given. The simulated results of lanczos and cubic spline interpolation methods are given simultaneously to show the performance of interpolation. The simulation result shows that the result images quality becomes better in both methods, but compared with bicubic interpolation method, the synthesized image PSNR gained from sub-pixel imaging is averagely enhanced by 2.1682dB, while the elapsed time is reduced to be about one forth. The subpixel imaging method could significantly mitigate the image blur introduced by under-sample.