摘要：A novel approach is proposed for improving adaptive feedback cancellation using a variable step-size affine projection algorithm(VSS-APA) based on global speech absence probability(GSAP).The variable step-size of the proposed VSS-APA is adjusted according to the GSAP of the current *** weight vector of the adaptive filter is updated by the probability of the speech *** performance measure of acoustic feedback cancellation is evaluated using normalized *** results demonstrate that the proposed approach has better performance than the normalized least mean square(NLMS) and the constant step-size affine projection algorithms.

摘要：Focus Media may dominate the industry, but some smaller companies are finding new ways to reach consumers - and are attracting capital to boot

摘要：现代生活中的椅子扮演着不可或缺的角色,作为普通的家具被人们使用。随着原料与制作工艺的发展,椅子的分类也被逐渐细化,可按照材质、用途、使用行业范围,甚至椅子本身的结构、物理性等进行分类,这样的分类促使椅子的外型与功能的设计更加严谨。设计师们突破材料与传统制作工艺的局限性,利用形状、颜色进行创意,使现代的椅子无论从外型还是功能都能更加符合现代家居的需求。

摘要：针对不确定性结构的非概率可靠性优化问题,提出一种基于模拟退火粒子群算法和差分进化算法(SAPSODE混合算法)的结构非概率可靠性优化设计方法。考虑结构非概率可靠性指标约束,建立最小化结构体积为目标的优化模型。为了提高结构非概率可靠性优化问题的计算精度和效率,采用基于认知经验进化的SAPSO-DE混合算法进行非概率可靠性优化设计。研究结果表明:基于SAPSO-DE混合算法的结构非概率可靠性优化设计方法克服了PSO算法的早熟现象,并提高了收敛速度和精度;该方法的全局搜索能力强,且具有较强的稳定性。

摘要：There are many design parameters to determine a performance of a robot. Especially, in the case of the mobile robots, they requirc complicated motion at various environments to get high performances. In this sense, the analysis of the design parameters is the most important work to design an efficient mobile robot. In this study, we analyze the design parameters for the water-running robot. From the parametric study, we find some solutions to improve the performances of the robot. We derive dynamic equations for the water-running motion, and do a sensitivity analysis to understand the relationships between the parameters （frequency of the leg, stiffness of torsional springs that connects multi frames and mass of frames） and the performance of the water-running motion such as running speed and pitching stability. We use an orthogonal array to make various combinations of the parameters, and to reduce the number of a simulation process. As results, we summarize some solutions to improve the water-running motion. We are expecting that this study is going to be used to design robots that are operated on the water.

摘要：This paper presents the performance evaluation of a regenerative pump to increase its efficiency using optimal design method. Two design parameters which define the shape of the pump impeller, are introduced and analyzed. Pump performance is evaluated by numerical simulation and design of experiments(DOE). To analyze three-dimensional flow field in the pump, general analysis code, CFX, is used in the present work. Shear stress turbulence model is employed to estimate the eddy viscosity. Experimental apparatus with an open-loop facility is set up for measuring the pump performance. Pump performance, efficiency and pressure, obtained from numerical simulation are validated by comparison with the results of experiments. Throughout the shape optimization of the pump impeller at the operating flow condition, the pump efficiency is successfully increased by 3 percent compared to the reference pump. It is noted that the pressure increase of the optimum pump is mainly caused by higher momentum force generated inside blade passage due to the optimal blade shape. Comparisons of pump internal flow on the reference and optimum pump are also investigated and discussed in detail.

摘要：这是坡州出版文化村内一座拥有30年历史、著名的H angilsa出版公司的新总部大楼,地面部分高4层,占地面积近2000m2。主要由办公区、展示区构成,艺术画廊及露天表演场作为其附属设施将建筑的基本功能延伸。这座建筑是坡州出版文化村综合性实验基地一期工程的建设项目之一,距离首?（共6页)

摘要：SDRAM (Synchronous DRAM) has become the memory standard in many digital system designs, because of low price and high read/write speed. In this paper, Based on the analysis of the working principle and characteristics of SDRAM, an SDRAM controller design method is proposed based on field programmable logic gate array FPGA. In order to reduce resource consumption and increase the read and write speed of SDRAM, the performance control of SDRAM is further optimized. We designed SDRAM controller by using Verilog HDL and Altera Quartus II 14.1 software, and simulated about this design with Model Sim-Altera 10.3c software. Then we verified this design by using Cyclone V 5CSEMA5F31C6 FPGA in DE1-SoC development board. The verification results show that the SDRAM is initialized successfully, the input and output data are completely consistent, and it has stable refresh and read and write functions. The SDRAM controller design meets the requirements.

摘要：在给定的设计要求范围内,希望设计出的机构具有最优的有效力传动性能.通过对曲柄滑块机构的几何关系和工作行程传动角的分析,确定了曲柄滑块机构的设计变量和工作行程最小传动角公式,建立了以工作行程最小传动角最大为目标的多维变量非线性优化数学模型,并给出算例,通过对比计算验证了提出的传动角最优的曲柄滑块机构多维变量优化设计方法.在行程速比系数、滑块行程和偏距等没有精确要求的情况下,为提高曲柄滑块机构有效的力传动性能,提供了一种实用的方法.

摘要：我国的明清时期,商品经济较为发达,与欧洲开展了大规模的海外贸易。由此,中国传统丝绸和瓷器装饰纹样对欧洲设计产生了很大影响,导致整个欧洲当时的艺术设计包括瓷器、建筑、家具、墙纸、面料和绘画等都出现了来自中国的装饰纹样元素,中国文化的概念深深扎根在欧洲各国人民心中,并由此催生了法国—中国式洛可可艺术的产生。