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The dynamics of spacecrafts with slewing payloads and flexible appendages are complicated, nonlinear, and coupling, which increase the difficulty of control. A new control scheme is presented for a type of flexible spacecrafts with slewing payloads. In the scheme, an adaptive fuzzy logic system (FLS) is designed to approximate the main dynamics of the plant, and an extended state observer (ESO) is...
On the inefficient panel adjustment of large reflector antenna, a method for determination of panel adjustment magnitude according to far field pattern is presented. Using the method of Physical Optics (PO), the relationship between the far field value and the node displacement is derived. Then the panel adjustment vector is related to far field pattern with linear equations. Singular value decomposition...
Planning manipulation path for virtual human arm takes an important role in such areas as computer animation and virtual maintenance engineering. The problem is usually defined to find a feasible non-collision path to connect initial configuration and goal configuration in joint configuration space. Since users are more concerned about the position and orientation of end-effector for reaching and...
Knowledge element relation recognition is to mine intrinsic and hidden relations, i.e., preorder, analogy and illustration from knowledge element set, which can be used in knowledge organization and knowledge navigation system. This paper focuses on what information is employed to recognize knowledge element relations. First, a formal definition of knowledge element and the types of relation are given...
Path planning for robots with many degrees of freedom (dof) receives continuous interest in both robotics and computer graphics communities. A variety of random sampling-based methods have been proposed to solve the path planning problems in high-dimensional configuration space, including Probabilistic Roadmap Method (PRM) and Rapidly-exploring Random Trees (RRTs). However, the efficiency will be...
Unstable angina is now a severe burden on society and family in both industrialized and developing countries, but the traditional related factors can not explain the whole situations and the traditional ??golden indicator?? for the diagnosis meet many new challenges. The aim of this study was to analyze the proteome characteristic pattern of unstable angina. Plasma samples were obtained from twelve...
TinyOS is an open-source operating system, using Component Description Language NesC for development. TinyOS is designed mostly for wireless sensor network, in which nodes have very limited resources. A representative scheduling mechanism in TinyOS is analyzed and its shortcomings are listed in this paper. An improved design of the priority-based soft real-time task scheduling strategy is proposed...
This paper mainly studies the risk analysis methods and their applicability to the development of materiel. First of all, it depicts the features and mission in every phase of materiel developmental projects, educing the curve which shows the change of risk and uncertainty with developmental process advancing. Second, several common risk analysis methods are introduced, including their input and output,...
This paper considers a continuous capacitated facility location problem without a priori knowledge of the desired number of facilities. The demand locations and volume are known to the decision maker. A new hybrid evolutionary algorithm combining variable-length GA (genetic algorithm) and PSO (particle swarm optimization) together is proposed to solve the problem. For variable-length GA, the chromosome...
In order to mining the organizational setting and interactions among coworkers from workflow logs, we define metrics to establish the relationships among originators by analyzing the information in the workflow logs. Three methods for mining organizational structure from workflow logs are presented in this paper, default mining, mining based on the similarity of activities and mining based on the...
Cognitive reliability and error analysis method (CREAM) is one of the most representative second-generation human reliability analysis methods. By using the CREAM, the retrospective analysis of the root causes of human error is given. There are no accordant standards of the determination of event sequences caused by the human errors in the root causes analysis in using process of weapon in CREAM....
A new control technique, peak inductor current and differential-mode voltage control technique, for non-isolated single-inductor multiple-output (SIMO) buck converters is investigated in this paper. The proposed control method can realize independent control of different output of the SIMO converters operating in continuous conduction mode (CCM) to reduce cross-regulation effect. By taking a three...
The strain F2 which produce excellent flocculating substance were isolated from soil samples and identified as Rhizobium radiobacter. The isolates F2 produced the flocculating substance during the late logarithmic growth phase and the early stationary growth phase. It was founded that the flocculation activated substances of BF distributed mainly in upper phase and were mainly composed of polysaccharide...
In this paper, a delayed stage-structured predator- prey model with the immature prey are taken care of by their parents and biological control strategies (that is releasing natural enemies at different fixed time) is considered. By using comparison theorem, the existence of the globally asymptotically stable prey-eradication periodic solution when the number of releasing natural enemies more than...
A wideband phased array with an aperture made of two distinct element periodicities, which effectively thin the array, is presented. The topology is based on a "quantized" version of the wavelenght-scaled aperture. This thinning method was used in conjunction with the doubly-mirrored balanced antipodal Vivaldi antenna (Dm-BAVA) elements to substantially reduce the element (and T/R module)...
This paper introduces a hybrid SVD-Krylov technique based on the balanced truncation - proper orthogonal decomposition (BT-POD). The method combines the best features of the two categories, namely offers error controls and indicators while preserving the efficiency of Krylov MOR. The most time consuming step related to the POD sampling is embarrassingly parallel, making the method suitable for multi-core...
An approach is proposed for abnormal sections detection in video sequences. In this approach, firstly the histogram is selected to describe the color change in the section, and then the histograms of the frames selected from the section compose the histogram matrix. In order to improve the process efficiency, the principal components analysis (PCA) is used to reduce dimensions of the histogram matrix...
The strategy of exempting bus from other traffic through exclusive bus lanes (XBL) is prevalent. Rather than just deploying the XBL system, in this study, a new innovative dynamic bus lane (DBL) operation system which is expected to be more productive is initially introduced. Unlike conventional studies which are mainly focused on operational performance of buses, this study attempts to examine the...
Polysaccharide is the main component of the flocculation activated substances produced by bioflocculant-producing bacterium F6. It could be extracted from the supernatant of the fermented medium by cold acetone precipitation and purified by treating with Sevag reagent. The result showed that the optimum extracting conditions were that concentrating multiple is 1/3, acetone consistency is 100%, acetone...
Electroencephalogram (EEG) is one of the most important neuroelectrical signals and is often used to detect brain's neuroelectrical dysfunction. However, the analysis of the EEG signal and extraction of features from it has been a challenging task due to the complexity and variability. It is difficult to recognize different stages of the real-time sleeping EEG signal from single EEG signal automatically...
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