摘要：Nature is an information sourcebook of behaviour, function, colour and shape which can inspire visual design and invention. Studying the form and functional characteristics of a natural object can provide inspiration for product design and help to improve the marketability of manufactured products. The inspiration can be triggered either by direct observation or captured by three-dimensional （3D） digitising techniques to obtain superficial information （geometry and colour）. An art designer often creates a concept in the form of a two-dimensional （2D） sketch while engineering methods lead to a point cloud in 3D. Each has its limitations in that the art designer commonly lacks the knowledge to build a final product from a 2D sketch and the engi- neering designer＇s 3D point clouds may not be very beautiful. We propose a method for Product Design from Nature （PDN）, coupling aesthetic intent and geometrical characteristics, exploring the interactions between designers and nature＇s systems in PDN. We believe that this approach would considerably reduce the lead time and cost of product design from nature.

摘要：设计了一种基于无模型自适应的外骨骼式上肢康复机器人主动交互训练控制方法.在机器人与人体上肢接触面安装力传感器采集人机交互力矩信息作为量化的主动运动意图,设计了一种无模型自适应滤波算法使交互力矩变得平滑而连贯;以人机交互力矩为输入,综合考虑机器人末端点与参考轨迹的相对位置和补偿力的信息,设计了人机交互阻抗控制器,用于调节各关节的给定目标速度;设计了将无模型自适应与离散滑模趋近律相结合的速度控制器完成机器人各关节对目标速度的跟踪.仿真结果表明,该控制方法可以实现外骨骼式上肢康复机器人辅助患者完成主动交互训练的功能.通过调节人机交互阻抗控制器的相应参数,机器人可以按照患者的运动意图完成不同的主动交互训练任务,并在运动出现偏差时予以矫正.控制器在设计实现过程中不要求复杂准确的动力学建模和参数识别,并有一定的抗干扰性和通用性.

摘要：给出了Ｔｕｒｂｏ码编译码器的基本框架，并提出了一种三维Ｔｕｒｂｏ码的设计方案及其译码方法．针对所提出的方案进行了计算机模拟，并在对ＡＷＧＮ信道上Ｓｈａｎｎｏｎ限与编码速率Ｒ的关系进行推导的基础上。

摘要：为研究个人鞋式导航定位方法,提出了一种基于地磁测向和时间到达差测距的行人航迹推算方法。该方法分为两部分:依靠地磁辅助的航向角检测和依靠时间到达差测距的行人步幅检测。研究结果发现,采用超声波收发阵列可以有效提高两脚间距离检测精度。此外本文分析出该方法的主要误差来源为航向角检测误差,并设计了最小二乘误差补偿算法,补偿前航向角误差约为15.93°,补偿后在0.435°以内。实验通过行人直线、圆形、操场行走测试,结果表明最大定位误差占总行进距离的1.2%。本方法具有广泛的工程应用前景。

摘要：压铸模具分型设计,是压铸模具结构设计的基础。文中论述了如何选择合适的压铸机吨位,确定模具型腔尺寸,建立合理简单的模具分型面。应用Pro/E实现压铸模具快速自动分型,形成模具型腔3D模型,缩短压铸模具结构设计周期,并能显著提高模具设计质量。

摘要：针对Aster导弹在PIF(pilotage inertial enforce)-PAF(puissance an frein)控制中的动力学问题,分析了侧向推力对导弹法向力、俯仰力矩、控制力的影响,建立了PIF-PAF控制导弹的纵向运动模型,采用小扰动线性化方法得到了PIF-PAF控制导弹的纵向扰动运动模型以及短周期运动模型。探讨了PIF-PAF控制提升过载响应时间的原理。解释了Aster导弹采用大面积弹翼、大面积舵面并将弹翼前缘后掠角设计为零的原因。

摘要：In this paper,a methodology for designing mooring system deployment for vessels at varying water depths is *** Non-dominated Sorting Genetic Algorithm-II(NSGA-II)is combined with a self-dependently developed vessel-mooring coupled program to find the optimal mooring system deployment considering both station-keeping requirements and the safety of the mooring *** case studies are presented to demonstrate the methodology by designing the mooring system deployments for a very large floating structure(VLFS)module and a semi-submersible platform respectively at three different water *** can be concluded from the obtained results that the mooring system can achieve a better station-keeping ability with relatively shorter mooring line when deployed in the shallow *** safety factor of mooring line is mainly dominated by the maximum instantaneous tension increment in the shallow water,while the pre-tension has a decisive influence on the safety factor of the mooring line in the deep water.

摘要：在Laurent分解的基础上,提出了一种改进的差分检测算法,算法在传统差分检测算法基础上增加Laurent匹配滤波及白化滤波,消除了其它分解子波形对算法性能的影响。仿真结果表明,误码率为时,文中提出的算法与传统差分检测算法相比有近0.5 d B的信噪比增益,算法复杂度没有明显增加。

摘要：A conceptual design of using novel telescopic piles to position a multi-modular very large floating structure(VLFS),which is supposed to be severed as a movable floating airport,is *** telescopic piles can automatically plug in the soil to resist the environmental loads and pull out from the soil to evacuate or move on to the next operational *** feasibility demonstration of the conceptual design includes two parts:function verification and structure *** the latter part of the conceptual design,a time-domain structural analysis is firstly conducted by using Abaqus *** simulation results suggest that the preliminary structure scheme is not optimum due to the insufficient structure utilization,although both structure safety of the piles and positioning accuracy are *** realize a cost reduction of construction and installation,a Genetic Algorithm-Finite Element Analysis(GA-FEA)method is employed to perform structural *** optimization,31 percent of the weight of each pile is reduced and higher structure utilization is *** difference of the self-weight and allowable buoyancy of a single module(SMOD)of a semisubmersible-type VLFS is much larger than the weight of the *** with the function verification in our previous work,the conceptual design of using the novel telescopic pile to position VLFS is demonstrated to be feasible.

摘要：针对先进航空发动机对高强耐热铝合金复杂壳体铸件的应用需求,对比分析一种新型Al-Si-Cu-Mg-Sc高强耐热铝合金与ZL101A,ZL205A铸造铝合金的工艺性能及力学性能,并采用高强耐热铝合金开展油泵复杂壳体金属型铸造工艺设计和实验验证,对铸件产品的质量进行检测分析。结果表明:新型Al-Si-Cu-Mg-Sc高强耐热铝合金的铸造流动性和抗热裂性能优于ZL205A高强铸造铝合金,其金属型铸造油泵复杂壳体的合格率与ZL101A同类壳体相当。新型合金的单铸试样和铸件本体取样的室温平均抗拉强度均达到420 MPa以上,明显高于ZL101A合金,250℃时其抗拉强度优于ZL205A合金。铸件的表面质量、内部质量、气密性和承压性能均满足产品设计要求。