查询词典 key element

In this dissertation the"Penalty"finite element method was employed to compute the velocity of the three-dimensional flow of power-law fluid in a profile die. In order to decrease the needed computer memory and raise the stability of numerical simulation, a set of decoupled methods such as PFEM, pseudo-body force method and transformation of momentum equation to the elliptic equation was developed to establish the general finite element equations to compute the distributions of velocity and viscoelastic stress of the three-dimensional viscoelastic flow of the Phan ThienTanner fluid in a profile die. During numerical simulation of the extrudate swell of the PTT fluid, the flow in the die and out of the die was analyzed separately, which demands less computer memory. The key techniques used in numerical simulation of the three-dimensional extrusion from dies such as decision of boundary conditions, creation of initial velocity field, selection of penalty factor, high Weissenberg number problem , regeneration of the free surface were studied in detail.

中文题名聚合物异型材口模挤出三维流动研究副题名外文题名 Study on three-dimensional flow of polymer melts during the process of profile extrusion from dies 论文作者涂志刚导师柳和生包忠诩教授学科专业材料加工工程研究领域\研究方向学位级别博士学位授予单位南昌大学学位授予日期2001 论文页码总数148页关键词挤出成型聚合物材料挤出口模聚合物异型材馆藏号BSLW /2003 /TQ320 /9 本文建立了求解挤出口模内幂律流体流动速度场的通用三维罚有限元模型；对于非线性粘弹性的Phan Thien-Tanner流体，为了降低模拟计算对计算机硬件的要求，并使模拟计算更加稳定，采用了一种去耦算法，包括罚有限元方法、拟体力方法和动量方程的椭圆类方程转化方法，并建立了求解速度场和粘弹性应力场的总体有限元方程；对于PTT流体的挤出胀大问题，提出了挤出胀大熔体口模内外分离模拟法，这样可以显著降低数值模拟对计算机硬件的要求。

In this article taking the attachment polysome contact key question of bearing which is used for some model solid propellant engine as the research background, based on the rolling bearing, applying the non-linear contact question in finite element method, the whole size 3D polysome non-linear finite element analysis under the work load is carried on.

本文以某型号固体火箭发动机轴承类接头多体接触的关键问题为研究背景，基于滚动轴承，采用接触问题的非线性有限元方法，在额定载荷下进行全尺寸三维多体非线性有限元分析。

The spectral imaging technology, with the resolving power both on the space and on the spectral, is the perfect combination of the image analysis and the spectral analysis.The study on the prismatic element is one of the key technologies in the area of the spectral imaging. The acousto-optic tunable filter is a newfashioned prismatic element.

近年来，光谱成像技术在军事侦察、精细农业、生物医学等领域的广泛应用前景引起了愈来愈多研究者的关注。

One key feature of Leibniz's metaphysics is the reconciliation between Aristotelianism and mechanical materialism, and his criticism of Descartism is a key element in this reconciliation as a principle.

莱布尼茨的形而上学的一个中心特点是要把亚里士多德主义与机械论调和起来。对笛卡尔主义的批评构成了他的调和纲领的一个主要部分。

After the biomechanical finite element analysis for the three-dimensional reconstruction model, we find the structure of the deformed nose showes the following characteristics: 1, Nasal septum, nasal columella, lateral feet of nasal alar, lateral nasal dorsum are stress concentrated regions, that is the key mechanical positions of deformed nose; 2, Under the static state, nasal deformation has a very small value of stress distribution, under displacement load status, the deformed nasal has a large value of the stress distribution; 3, Ipsilateral nasal columella are the the key mechanical parts of deformed nasal rectify. And lateral nasal alar is also the most stress concentrated areas.

对于重建后的单侧唇裂鼻畸形鼻部模型进行有限元生物力学研究，发现畸形鼻的力学结构呈现以下特点：1、鼻中隔、鼻小柱、鼻翼外侧脚、鼻背外侧是单侧唇裂鼻畸形应力分布的集中部位，也就是畸形鼻部的力学关键部位；2、在静态状态下，畸形鼻部拥有的应力分布值很小，在位移载荷状态下，形变后的畸形鼻部拥有的较大的应力分布值；3、单侧唇裂鼻畸形整复中，鼻小柱患侧部是畸形整复的力学关键部位，其次就是患侧鼻翼部。

Guangdong is a province strong in overall economic development yet weak in local county economy, while lagging behind in overall level of human capital is a key element to curb the economic development in the county area of Guangdong Province; therefore, it is a key issue to be discussed in the paper how to enhance the competitiveness of the human capital in the county area of Guangdong Province to promote the development of economy in the county area.

本研究力图从经济学和管理学等的角度阐述县域人力资本的特征及其对县域经济发展的影响，为此本文选取了广东省县域人力资本作为研究对象。广东省是一个城镇经济强省和县域经济弱省，而人力资本总体水平的落后是制约广东省县域经济发展的关键因素，因此，如何提升广东省县域人力资本竞争力进而促进广东省县域经济的发展是本文要探索的主要问题。

Optical switch is the key element of all optical network. MEMS optical switch arrays, which can achieve small insertion loss, low cross talk and large switching contrast, are going to be the key considerations in the optical cross connectors and optical add/drop multiplexers for optical networking.

光开关是全光交换的关键器件，MEMS光开关由于具有潜在插入损耗和串扰低、消光比高等诸多优点而成为光网络中光交叉连接和光分插复用器的主流器件。

From the different point of view, the listed company refinances mechanism has different structure and form of expression. Look from forming the key element, the refinancing mechanism is melted out such key elements as the square , person who incorporates square , price , market , supervision of fund , intermediary ,etc. to form by the fund. According to financing source, the refinancing mechanism while being endogenous and other source financing form again; According to financing way, the refinancing mechanism makes up indirectly by the direct financing. According to financing tool, listed company refinance mechanism include creditor"s rights financing, stock financing, half stock right half creditor"s rights financing.

从不同的角度来看，上市公司再融资机制有不同的结构与表现形式：从构成要素看，上市公司再融资机制由资金融出方、资金融入方、价格、市场、监管者、中介机构等要素构成；从融资来源来看，上市公司再融资机制由内源融资和外源融资构成；从融资方式来看，上市公司再融资机制由直接融资和间接融资组成；从融资工具来看，上市公司再融资机制则包括债权融资、股权融资、半股权半债权融资。

"Master the key tech, never stop the exploring of new products, drop low market competition and explore high market. These are the key element for the success of an enterprise."

&掌握核心技术，不断创新产品，摆脱低端角逐进入高端市场，是企业立于不败之地的关键。&

SIFT（Scale Invariant Feature Transform） local feature is chosen because of its scale invariance and the property of accurate key-point localization.The Euclidean distance between different SIFT feature vectors is defined as the measure of similarity to get the pre-matched key-point pairs.The affine transform model is used to realize the registration.In order to get the accurate affine transform parameter,the principal of affine transform error is used to get rid of mismatched key-point pairs from the pre-matched pairs.

该方法选取具有良好尺度、旋转不变性以及精确特征点定位能力的SIFT局部特征，使用其特征向量间的欧氏距离作为相似性度量进行特征点匹配，并依据仿射变换误差准则去除奇异匹配特征点对，采用仿射变换的几何模型，实现了遥感图像的快速自动配准。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。