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Objective: Systematically review the value of second-trimester triple serum tests screening for Down's syndrome by using meta analysis. Method: The literature on PubMed, Journal of Medicine Library, CNKI, Web of Knowledge from January 2000 to April 2014 concerning second-trimester Down's syndrome screening was retrieved by computer or by hand. The literature was evaluated based on the QUADAS quality...
This paper restudies the incompletely insuring condition under the influence of adverse selection in insurance market. First of all, this paper demonstrates the bilateral information asymmetry on the insurance market. Following that, through the application of Karush-Kuhn-Tucker Theorem, this paper deduces this condition newly. Finally, this paper draws the conclusion that insurance company should...
The SET k-cover problem is an NP-complete combinatorial optimization problem, which is derived from constructing energy efficient wireless sensor networks (WSNs). The goal of the problem is to find a way to divide sensors into disjoint cover sets, with every cover set being able to fully cover an area and the number of cover sets maximized. Instead of using deterministic algorithms or simple genetic...
According to equity theory, perception of distributive justice is determined by referent. Based on social comparison theory, the referent information can be organized into three categories: information of average (IA); information of better paid referent (IB); and information of worse paid referent (IW). For the purpose of testing the effect of multiple referent information on the perception of d...
Empowerment is an effective management tool and has made tremendous benefits for employees and organizations, which has been approved by many studies and practices. However in China, it is so common that managers don't want to empower. So the main aim of this research is to analyze that phenomenon from the perspective of empowerment risk perception. From the data of 209 managers and 618 subordinates...
Intuitionistic fuzzy set (IFS) is a generalization of fuzzy set by introducing an additional attribute parameter called non-membership degree. In this paper, an intuitionistic fuzzy associative memory (IFAM) network is proposed by combining IFS with associative memory network. Based on Goumldel fuzzy implication operator and its dual fuzzy co-implication operator, a learning rule for multiple intuitionistic...
This paper deals with using density ensembles methods to enhance continuous estimation of distribution algorithms. In particular, two density ensembles methods are applied: one is resampling method and the other is subspaces method. In resampling continuous estimation of distribution algorithms, a population of densities is obtained by resampling operator and density estimation operator, and new candidate...
This paper presents a novel approach to recognize similar handwritten numerals based on empirical mode decomposition (EMD). We firstly use the local maximum modulus of wavelet transform (MMWT) to get the width-invariant and grey-level invariant characterization of contours in an image. Then we apply EMD analysis to decompose the synthetic shift normalization of curvature into their components, which...
This paper presents a method for simply and interactively modeling and reusing 3D sleeve. Firstly, 3D sketches of basic sleeve skeleton are generated based on the recognized body feature points and sizes, and the sleeve surface can be quickly constructed; secondly, a sleeve surface modification method driven by sketch is adopted to build complex sleeve shape more freely; finally, we joint the sleeve...
Many evolutionary algorithm (EA) based methods have been proposed to solve protein structure prediction (PSP) problem in HP-lattice model. One of common difficulties of those methods is the existence of invalid individuals produced by geometrical constraints in the conformation of protein (i.e. self-avoidance in the chain). A backtracking method is often used to repair the invalid individuals of genetic...
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