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First, this paper, in the field of intrinsic geometry, studies the geometric problems on garment design, as well as applies the frame and semi-geodesic coordinates to prove the fundamental theorem of being a developable surface.

文中首先在内在几何学的层次上,研究了服装设计所涉及的几何学问题,应用标架与半测地坐标方法证明了曲面成为可展面的基本定理,研究了可展面的分类及其性质,考虑到服装三维几何造型的需要,证明了组合式可展面各组成片相切连接条件的命题,作为构造可展面的理论依据,证明了单参数平面族的包络面必为可展面的命题,在此基础上发展出服装几何造型的"刮大白"方法以及相关的三种构造可展面的解析方法。3D→2D的变换是三维服装CAD的重要内容之一,其几何学实质是曲面的定长映射,文中总结了定长映射即可展面在平面上展开的基本准则,在这一准则的指导下,结合服装设计与相关领域的要求,讨论了可展面在平面上展开的解析方法与数字方法,上述内容确立了服装设计几何学的基本框架。

Five novel torsion-mirror optical actuators including double-beam thickness differential structure with single torsional axis, double flexible folded-beam structure with single torsional axis, double-beam vertical torsion comb structure with single torsion axis, four-beam differential compound-micromirror structure with double torsional axis and the combined structure of the four basis forms above, are brought forward. All of these devices could be fabricated by the same silicon micromachining process we have developed. The deformation compensation design with local enhancement for the thin torsional beam which is the key structure of these devices is also put forward to improve the reliability. The three-dimension solid model and two-dimension reduced order model of the torsion-mirror optical actuator are established and then the numerical simulations for evaluating the device characteristics of the statics, dynamics, electrostatic field, mechanical and electrostatic coupling, fluid and solid coupling are carried out to optimize the structure design. Furthermore, three optical fibre clamping structures which could be integrated monolithicly are designed and analyzed to improve the optical coupling capability. 4. Three flexible process flows combined with bulk silicon micromachining and surface silicon micromachining are brought forward to fabricate these novel single-crystal silicon or polysilicon torsion-mirror optical actuators by using the same lithography masks for both SOI wafer and regular silicon wafer. A series of important process experiments are carried out to optimize the process parameters and the process flows. Some novel and typical process phenomena which occurred during the microfabrication are analyzed and then the corresponding solutions are put forward. 5. A MEMS dynamic testing system which exploit blur image synthetic technique, stroboscopic image matching technique, stroboscopic mirau microscopic interferometry technique and microscopic laser dopper vibrometer technique is set up to measure three-dimension and six-freedom micro motions of any MEMS devices with nanometer resolution.

在对硅微机械扭转镜光致动器的光机电特性系统地理论研究的基础上提出了硅微机械扭转镜光致动器的结构设计准则。3、提出了单轴双梁厚度差分结构、单轴双柔性折叠梁结构、单轴双梁垂直扭转梳齿结构、双轴四梁差动复合微镜结构以及以上四种基本结构组合后的衍生结构等五种工艺加工技术兼容的新型的硅微机械扭转镜光致动器,对器件关键结构薄厚度、高耐疲劳扭转梁进行了局部加强的变形补偿设计,建立了器件的三维实体模型以及两维降阶模型,对提出的新结构硅微机械扭转镜光致动器进行了系统的静力学、动力学、静电场、力电耦合和流体固体耦合的建模仿真与优化设计,同时设计并分析了三种可实现单芯片集成的弹性光纤定位夹紧结构。4、提出了组合体硅微加工技术与表面硅微加工技术、兼容同一套光刻版图、可分别基于SOI 晶片和普通Si 晶片、适应于制造提出的各种新结构单晶硅和多晶硅硅微机械扭转镜光致动器的三套柔性加工工艺流程,开展了一系列重要工艺步骤的单项工艺试验,对工艺流程与工艺参数进行了优化,针对加工过程中出现的具有普遍意义的典型工艺问题进行了讨论和分析,并提出了解决方法。5、创新性地将模糊图像合成技术、频闪图像匹配技术、频闪Mirau 显微干涉技术与显微激光多普勒测振技术有机结合,建立起了一套周期运动测量与瞬态运动测量相结合、单点运动测量与全视场运动测量相结合、满足不同MEMS 器件各种动态测试要求的集成的MEMS 三维六自由度微运动精密测量系统。

In general, the design work with traditional measures is done by hand, which cannot meet the needs of the technology and manufacture. So the author has developed a CAD hydraulic design software fit for lower specific speed axial flow runner, which is easily operated by users.The main research work of this paper is as follows:1 Analyzing the main reason of axial flow power station cannot work well under littler volume of flow in some season and putting forward an improving scheme, pointing out the characters of design under abnormal factors.2 Combined with the development of the industry in our country, the abnormal hydraulic design method of propeller turbine is discussed based on present literature, data and experiment results.3 Guided by the design method of software engineering, a suit of hydraulic design software of Lower Specific Speed Axial Flow Runner is programmed by the object-oriented programming language Visual Basic and a straightforward, concise and standard Windows human-computer dialogue interface is designed for the system, which makes the operation of the system very convenient.4 ActiveX Automation technology is adopted as the interface with AutoCAD and the hydraulic drawings are edited, modified by AutoCAD until hydraulic model drawings according with the demand of engineering practice are output.5 To resolve practice problem, the author has designed a lower specific speed axial flow runner for Duowa Power Station through an example.

论文的主要内容有:1 深入分析很多轴流定桨式水电站枯水季节小流量下不能发电的主要原因,提出减容改造方案,并指出超常规条件下的改造设计特点。2 结合国情及行业发展需要,参考现有资料、文献和前人的研究成果,进行低比转速轴流式转轮叶片水力设计方法的研究,对轴流式转轮叶片的奇点分布法水力设计进行了全面的探索,结合现代计算机技术,找到了一种针对特殊条件的轴流式转轮叶片水力设计方法。3 仔细比较多种AutoCAD二次开发工具后,结合本课题的特点,选用Visual Basic语言,综合应用软件工程的设计思想,进行低比转速轴流式转轮叶片水力设计软件的编制,为系统设计了直观、简洁和标准的Windows人机对话界面,便于用户操作;编程时在考虑到设计条件特殊性的同时,尽量做到程序的通用性,使之可用于解决同一类问题;另外,大部分程序还可移植到普通轴流式转轮叶片水力设计中,具有良好的适应性。4 利用ActiveX Automation技术与AutoCAD接口,对AutoCAD进行二次开发,在AutoCAD下实现水力图的自动生成和编辑,直至输出符合实际工程要求的木模图。5 通过算例,为多哇水电站设计了一个低比转速轴流定桨式转轮,解决其在枯水期小流量下不能发电的问题。

It will expose the design problem of maintainability of civil airplane to the early stage of design. This paper discusses the composing of the virtual maintenance environment, builds non-immersion virtual maintenance environment of undercarriage, and establishes a part library management system. The characteristic of maintainability models and maintainability analysis based on virtual technique is researched to give the maintainability frame model of civil airplane virtual maintainability analysis. All levels of maintenance time model and maintenance man-hour model are established. Analog-Huffman code is proposed to optimize space partition method in traditional collision detection arithmetic."Maintenance therblig"is brought into the broken down of maintenance tasks, and the new maintenance tasks broken down method is proposed. The demands of human measure, position, and equipment layout in human engineering are discussed, and the verification methods of human measure, position and equipment layout in virtual maintenance are given. Basic principle and verification procedure of maintainability virtual verification is developed primarily, and the reachablity, the visibility, and posture-comfortability are verified.

本文论述了虚拟维修环境的组成,构建了某型飞机主起落架非沉浸式虚拟维修环境,建立了维修对象的零件库管理系统;研究了基于虚拟技术的维修性模型特点及维修性分析流程,给出了基于虚拟技术的民机维修性分析框架模型,并结合传统维修性模型,建立了各级维修时间模型和维修工时模型;提出类HUFFMAN编码,结合人因工程的要求,优化了传统碰撞检测算法中的空间分割法,使之适用于柔体;在维修性分解中引入"维修动素",给出了与CATIA、DELMIA等应用软件结合紧密的维修任务分解方法;论述了人因工程中对人体尺寸、姿势、设备布局的要求,给出了虚拟维修中人体尺寸、姿势分析、民机内设备布局的验证方法;初步制订了维修性虚拟验证的基本原则和验证程序,并结合具体实例对可达性、可视性、干涉性以及人体姿态舒适性进行了验证,较清晰、真实地反映了维修人员的维修状态。

The proposal of a new parallel system architecture, which combines the advantages of both NUMA and cluster, the usability as the main focus of system design, its scalability, high availability, and flexibility to configure and re-construction being the aim of the system.

提出了一种新的体系结构,即机群NUMA系统,这种新的系统很好地结合了机群和NUMA机器的特点,以好用性为核心,以可扩展性、高可用性和系统的灵活动态可配置和重构为目标,很好地结合了机群系统和传统NUMA系统的优点。

Both the thermophilous plants and hardy plants should be planted to keep the operation of the wetland system all tear round and the submerged plants and the emerging plants should be planted in a same space to make the wetland system more effectively.

在时间上,可将喜温植物与耐寒植物结合,以保证湿地系统的长年运行;在空间上,可将挺水植物与沉水植物结合,以保证湿地系统的处理效果。

The composition, interface and cross section of the sintered EPCD coating were observedand analyzed by SEM, X-ray diffraction , Infra-red spectrum, EPMA, Energydispersion X-ray fluorescence analysis and X-ray-electron spectroscopy,the results show that the coating made from〓BG is composed of HA, titanite and bioglass.

钛合金基体表面的喷砂处理不仅可改善与涂层的机械结合,还可加速其表面氧化和降低预氧化温度,对于实现涂层的低温快速烧结和提高涂层结合强度有重要意义。

In vitro associstion experiments indicate that the plasmid pAy6.8 containing the core region of Antheraea yamamai fibroin gene can tightly bind to the nuclear matrix of Bombyx mori fertilized eggs,and recognize the same binding sites of homogeoous MAR fragments.

体外结合实验表明,携带天蚕丝素基因核心区的质粒pAy6.8可与家蚕受精卵核基质紧密结合,而且同内源MAR片段竞争结合位点。

The reaction mechanism of tetrakis hydroxymethyl phosphonium chloride and raw collagen were researched by the simulated materials of collagen including glycin,ethylenediamine and hide powder.

通过研究四羟甲基氯化鏻与皮胶原模拟物反应,间接证明THPC主要与胶原蛋白的氨基结合,可与氨基以n∶n=1∶2.2形成交联,THPC与羟基和酰胺基均有少量结合,并在pH=8.0时结合量最高。

This synthetic strategy is based on the combination of different polymerizations, especially controlled polymerizations, and the combination of different controlled polymerizations with coupling reactions, such as "click" reactions, Diels-Alder reaction and active ester reaction etc..

这一合成方法的思路是基于将不同聚合反应,尤其是不同可控聚合反应相结合,或者将可控聚合与不同的偶合反应,例如与点击反应、Diel-Alder反应和活性酯反应等相结合。

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推荐网络例句

The X-ray diffract was used to analyze the crystal structure of the composite. Results show that after the talc was treated with blend coupling agent, the crystal structure of talc changed, and effect Intercalation phenomenon.

通过X射线衍射分析可知,用混合偶联剂对滑石粉进行预处理后,滑石粉晶体结构发生改变,产生了插层现象,使PP/滑石粉复合材料为纳米复合材料。

An authentic Maui wedding might require the services of a 'kahu', which is a Hawaiian minister.

毛伊可能需要一个真实婚礼服务'kahu',这是夏威夷部长。

Funds involving such cases are limited and there is no huge capital flight.

与此有关的资金数额是相对少数的,并没有引发资本外逃现象。