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Aiming at the current, electric-magnetic torque and speed oscillation problems during the soft-starting of induction motor controlled by thyristors, the soft-starting simulation model is built. Based on the simulation study of influencing factors and causes of oscillation during the soft-starting, and further analysis on voltage and mechanical properties of motor starting, a scheme of power-factor...
This paper introduces an in-house far-field THz antenna measurement system. The antenna measurement system covers the bands of 220–325 GHz, 325–500 GHz, 500–750 GHz and 750–1100 GHz.
A broadband image-rejection SHP (sub-harmonically pumped) mixer in Ka-band is proposed in this paper. It is composed of two SHP mixers, an LO in-phase power divider, and an RF quadrature-phase divider/combiner. To get smaller chip size, quasi-lumped components are utilized in the design. The simulated conversion loss of the chip is 11-12.5dB, image rejection is better than 20dB in most of the Ka-band,...
This paper proposes a novel full-digital architecture of adaptive decision feedback equalizer (ADFE) for wireline 2-level pulse amplitude modulation (2-PAM) systems. It is well known that the feedback loop in DFE limits the greatest achievable speed. The proposed scheme begins by deriving coefficient-lookahead concept based on a reasonable assumption, whereupon a preliminary architecture can be implemented...
This paper proposes a select probability estimation bias (SPEB) for fixed-width Booth multipliers. Considering the special condition in Booth encoder, the selection mode is included to compensate truncation error in fixed-width Booth multiplier design. The probability estimation method is adopted in the general condition. Compared to the existing works, the proposed SPEB 16×16 fixed-width Booth multiplier...
In this paper, we present a hardware design which can support the inverse transform size from 32×32 in high efficiency video coding (HEVC) and is implemented by a using single 1-D IDCT core with a memory to low cost architecture. The proposed 1-D IDCT core employs two calculating paths to achieve a high throughput rate and is implemented by a 1-D inverse transform which can calculate 1st-D and 2nd-Ddata...
A new design of TEM wideband horn feed with four orthogonal ridges is presented, resulting in better VSWR and gain antenna for 6m-diameter reflector antenna. By tapering the ridges, it is possible to extend the operating frequency band while decreasing the size of feed. The proposed wideband feed with dual linearly polarization and compact size in a shared aperture takes the features of constant phase...
Based on the analysis of the equivalent circuit model for mushroom-like electromagnetic band-gap structure, a compact EBG structure is proposed. Capacitors and inductors are loaded in series between the neighboring metal patch units in this paper The research demonstrates that when the size of the unit cell remains constant, the band-gap frequency can be decreased by this loading way. Therefore, it...
The treatment of high salt oily waste water is a hot point in the research of water treatment for it contains large amount of salinity and organic pollutants. Biological treatment is an ideal way with characteristics of being economic, efficient and harmless. In this paper we separated and purified the superior strains of halophilic bacteria from SBR bioreactor in the treatment of high salt oily waste...
This paper presents coal consumption of electricity generation in China under different energy scenarios of the given long-term energy policies. Long Range Energy Alternatives Planning 2008(LEAP 2008) software is used to develop a simple model of electricity demand and to estimate gross coal consumption of electricity generation in China until 2030 under these scenarios. And, time-serial emission...
Currently in the flatness feedback control of hot strip mill it mainly adopts conventional PID controller, the parameters of which are often designed to a kind of situation and are invariable, so it is difficult to keep flatness well in hot tandem rolling. On the base of analyzing the shape generation theory and model prediction control theory, the flatness control system by adjusting last stand bending...
In the paper, an image degradation process is considered as equivalent to a linear transformation of original image matrix processed by transfer function and noise, while the image restoration process is equivalent to trying to get the original image using the least squares method. When the transfer function is separable, the problem is transformed into finding the inverse matrix of a Toeplitz matrix...
The efficiency and precision of traditional particle swarm optimization were always influenced deeply by initial positions of particles and the initialization of random numbers, especially in the optimization of the best principal dimensions of ship. The numerical distributions of different chaotic sequences were analyzed in this paper, and the chaotic sequences were introduced into particle swarm...
This paper presents a general toolkit developed for discrete Estimation of distribution algorithms (EDAs). The essence and procedure of each algorithm is presented, and the toolkit is used to solve several toy problems, which is presented in the latter part of the paper. We implemented and presented a general toolkit for EDAs (gtEDA) as a Matlab toolkit for EDA experiments. The experiments conducted...
An approach to observer trajectory optimization for maneuvering target is proposed in this paper through minimizing the cost function based on Extended Kalman Filter (EKF) related with uncertainties of state estimate. Computer simulation results demonstrate that the significant improvement in accuracy can be further achieved through combining observer trajectory optimization with Interacting Multiple...
Prion protein (PrP) is probably the only known infectious protein that possesses chameleon-like features, as reflected not only in its conformation but also in its function. Cellular PrP (PrPC), rich in α-helical structures, is believed to be functionally involved in neurotransmitter metabolism, immune cell activation, cell adhesion, signal transduction, copper metabolism, antioxidant activity, and...
With the challenge of climate change, many governments around the world are focusing on reducing emissions of carbon through energy efficiency improvements, particularly in the rapidly-growing electricity demand. There are great potentials in this sector for reducing emissions in both supply-side and demand-side. On the supply-side, thermal power plants are major contributors to CO2 emissions. Promoting...
A large-signal circuit model of QCL is described, which is based on a set of rate equations by analyzing the unipolar behavior of electrons in quantum well , and the frequency response characteristic of QCL is got by the circuit simulation of PSPICE Program. Consequently some factors that can affect the modulation characteristic of QCL have been analyzed .
UCM cold rolling mill has strong ability of crown and flatness control, but it seriously lacks the edge drop control ability. In this paper, an explicit dynamic finite element method is adopted to build a combinatorial simulation model for roll stacks and strip, based on the 4-stand PL-TCM cold rolling mill of Masteel. Then the method of optimizing the intermediate roll shift position is proposed...
Lock-free algorithms provide a new way for thread synchronization, it avoid some common problems encountered in traditional synchronization methods. But the implementation of lock-free algorithm is generally complex. The lock-free queue algorithm described by Maged M. Michael and Michael L. Scott was fast and simple, its implementation using C++ under Windows platform was described. The algorithm...
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