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The results show that space finite analysis results are close to test ones, bottom chords suffer axial force and large in-plane bending, and the max stress is nearby each middle internode. The max stress of node crossbeams occurs in No.2 bottom flange, and that of internode crossbeams happens in ones lying in the middle of every internode. The concrete slab is in tension at the longitudinal direction, and also suffers bent at vertical loads. The degree of completely-composite model taking part in the combined actions is about 55%, while that of semi-composite model is 42%-43%. The combination of concrete slab and bottom chord increases the degree of floor system taking part in the combined actions, lightens the burden of bottom chord, and reduces out-of-plane bending of node crossbeams especially the ones near bridgehead. Stress and displacement of main truss can be evaluated by a equivalent plane rigid frame in preliminary design, and effective stiffness of bottom chords are composed of original ones and concrete slab, and the concentrated load from deck can be translated into uniform load.

研究结果表明：空间有限元分析结果与试验结果较吻合；下弦杆受到轴向拉力和较大的面内弯矩作用，各节间最大应力出现在节间中点附近；节点横梁最大应力发生在横梁2的下翼缘，节间横梁最大应力发生在位于端节间中部的小横梁上；混凝土板顺桥向整体受拉，并在竖向集中荷载作用下产生弯曲变形；全结合模型大部分节间内的桥面板参与主桁共同作用的程度为55%左右，半结合模型桥面板的参与程度为42%~43%；桥面板与下弦杆结合能够增加桥面板的参与程度，减轻下弦杆荷载，减少节点横梁尤其是靠近桥头横梁的面外弯曲；对桥梁进行初步设计时，主桁杆件的位移与内力可按照1个等效的平面刚架计算，下弦杆的等效刚度由原下弦杆截面和混凝土桥面板截面组合而成，桥面荷载可转化为均布荷载施加。

Results The 8 cases of supratentorial lesions included temporal lobe lesion in 4 cases,occipital lobe,fronto-occipital lobe,fronto-parietal lobe,parietal lobe,frontal lobe in each 1 case.All the lesions were quite large in volume,and the largest one was 6.0cm×5.2cm×6.2cm.All the lesions locate close to the convexity of brain,and the meninges around the lesions were not incrassation and enhancement.All the supratentorial lesions were regular in shape,well demarked,and often with slight peritumoral edema in 6 cases and no edema in 2 cases.The lesions demonstrated long T1 and long T2 signal intensity,mixed signal intensity on T1WI and T2WI.Small cystic degeneration could be seen in 2 cases.

本组病例肿块均较大，均位于脑实质内，占位效应明显，最大者为6.0cm×5.2cm×6.2cm，最小者为4.5cm×3.8cm×3.8cm；位置表浅，邻近脑膜，但周围脑膜无明显增厚；肿块形态：类圆形6例，不规则形2例；肿块边缘清楚；均匀实性肿块6例，肿块内可见囊性改变2例；肿块周围可见轻度水肿6例，2例肿块周围无水肿；肿块信号相对均匀，T1WI呈稍低或低信号，T2WI呈稍高或高信号，其中2例肿块内可见脑脊液样T1、T2信号影；肿块呈均匀强化6例，环状强化2例。

Results The 8 cases of supratentorial lesions included temporal lobe lesion in 4 cases,occipital lobe,fronto-occipital lobe,fronto-parietal lobe,parietal lobe,frontal lobe in each 1 case.All the lesions were quite large in volume,and the largest one was 6.0cm×5.2cm×6.2cm.All the lesions locate close to the convexity of brain,and the meninges around the lesions were not incrassation and enhancement.All the supratentorial lesions were regular in shape,well demarked,and often with slight peritumoral edema in 6 cases and no edema in 2 cases.The lesions demonstrated long T1 and long T2 signal intensity,mixed signal intensity on T1WI and T2WI.Small cystic degeneration could be seen in 2 cases.

本组病例肿块均较，均位于脑实质内，占位效应明显，最大者 6.0cm×5.2cm×6.2cm，最小者为4.5cm×3.8cm×3.8cm；位置表浅，邻近脑膜，但周围脑膜无明显增厚；肿块形态：类圆形6例，不规则形2例；肿块边缘清楚；均匀实性肿块6例，肿块内可见囊性改变2例；肿块周围可见轻度水肿6例，2例肿块周围无水肿；肿块信号相对均匀，T1WI呈稍低或低信号，T2WI呈稍高或高信号，其中2例肿块内可见脑脊液样T1、T2信号影；肿块呈均匀强化6例，环状强化2例。

The following exciting results are revealed: 1 When considering the influence of some nonlinear elements such as hard-limit of exciters, the effects of some devices such as Power System Stabilizer and Static Var Compensator which can introduce positive damping in power system, the reasonability of system parameter values in simulation, the SNB surface and HB surface on the boundary of SSSR will turn close to each other and even coalesce together; 2 Under some conditions, coupling between slow exciters and shunt capacitors will bring negative damping in power system dynamics, which increases the possibility of oscillatory instability. So the power system with mass shunt compensators is easily subjected to the oscillatory instability. In recent years, chaotic phenomena of power system have been reported many times. Some simulation studies even found chaos existing inside the power system SSSR. In this dissertation, chaotic phenomena in power systems are thoroughly studied in order to make clear the relation of chaos and SSSR. The following results are derived: 1 Based on Li-Yorke Theorem and their definition on the chaos, the existence of chaos in power system is verified; 2 Three possible routes of causing chaos in power system are found and deeply investigated. They are route of cascading period doubling, route of directly initial energizing and route of torus bifurcation (or quasi-periodicity). The latter two routes are investigated for the first time in power system stability studies; 3 When the stability conditions of chaos are broken, it is found they can lead to voltage collapse, angle divergence, or voltage collapse with angle divergence simultaneously.

针对在电力系统小扰动稳定区域内可能存在混沌吸引域的有关报道，本文深入研究了电力系统混沌现象的出现途径和与系统失稳模式之间的关系：1利用Li-Yorke定理和Li-Yorke的混沌定义，从理论上证明了电力系统混沌现象的存在性；2发现了电力系统中导致混沌出现的三种可能途径：倍周期分岔导致混沌、初始能量直接激发混沌和经由环面分岔导致混沌，并对后两种新发现的途径进行了较为细致的研究；3发现了混沌极限环破裂导致电压崩溃、角度失稳以及电压崩溃和角度失稳同时出现的现象，其中混沌极限环破裂导致系统角度失稳和电压崩溃及角度失稳同时出现的现象均属首次报道；4证明由微分-代数方程描述的系统模型，其小扰动稳定域的边界只包含HB、SNB和SIB三种分岔界面，在SSSR的内部和边界上，均不可能存在会导致混沌的点，从而将混沌现象排除在小扰动稳定域的研究之外，简化了后者的研究工作。

The simulation results of the cylinder-block model were given in the article, consistent with that of Middlemen"s. It was shown that the block part could improve the uniformity of the flow distribution. The analysis of the flow field of some materials with different power-law factor in the die designed by Mckelvey was close to that of Mckelvey"s. It was shown that the flow distribution was uniform in the die that can producesheets with 1200mm in width. During the analysis the flow channel was divided into several parts to get the details about the fluid flow in each area. A conclusion was drawn after analyzing the influence of the die pressure on the flow distribution, that the higher pressure is good for the output and bad for the uniformity of the distribution. Simulation of the die applying the cylindrical main runner showed the fact that when the cylinder replaced the cone the change of uniformity was trivial. The uniformity of the non-block flow channel was so poor that the block in the proper position of the die channel was necessary. The project of the die for the wider sheet was put forth, and the analysis of the fluid flow in the die was shown.

本文模拟了圆柱管缝隙流模型的三维流动场，得到了与Middlemen结论一致的流动均匀性，并通过模拟直观地展示了采用阻尼块可以改善挤出均匀性的现象；分析了多种幂率指数的流体在Mckelvey等人设计的流道模型中的流动分布，得到了与Mckelvey的分析结果接近的压力降和流量偏差；本文建立了1200mm幅宽机头流道的三维有限元模型，并逐个分析各个区域和多个截面的流动分布状况，由此揭示了1200mm幅宽L-型机头流道内的流北京化工大学硕士学位论文动分布基本均匀，并在分析了机头压力对于挤出流动分布的影响后得出结论：较高的机头压力可以获得较大的产量，但是不利于物料均匀分布；模拟了采用圆柱管主流道时机头流道内的流动分布，得出结论：主流道由圆锥管改为圆柱管时对流动均匀性影响不大，通过设置适当的阻尼仍然可以达到挤出平衡；模拟了两端进料式圆柱管无阻尼流道的流动均匀性后得到结论：两端进料式无阻尼结构的流动均匀性较差，宽机头中仍然有必要设置阻尼块；确定宽幅机头流道的基本方案，并设计了一种宽幅防水卷材挤出机头流道的结构，通过流动模拟表明该种结构的流动均匀性较好；考察了宽幅机头对于不同厚度片材的挤出适应性，得到结论：当生产不同厚度的片材时，阻尼块高度需要调整。

Located in xingping in Shaanxi Province Guanzhong hinterland, xingping in itself as "the land of " fabric of its reputation, popular homespun history of textile, fabric that is, they were joined by origins, Holung Samuel xingping, in xingping village, the sons of those two Millennium Samuel sizeable equity portfolio, it will be legendary charming Dong Yong order, and to meet people where Professor weaving skill----in recent years, xingping Jin shuttle ancient art hand spinning co., Ltd., conforming to the modern people return to the nature of the concept of consumption of natural, in a traditional hand spinning process basis into fashion design and aesthetic elements, using quality cotton as raw material, meticulously by rural women workers, while spinning, dye, pulp line, playing extinguishers, via, rolling, weaving, desizing, shrink, joint production of tailor, and so on 17, worsted produce series on close hand original products.

近年来，兴平市金梭子古艺手纺有限公司顺应现代人返朴归真、崇尚自然的消费理念，在传统手纺工艺基础上融入时尚设计与美学元素，采用优质棉花为原料，精心组织农村巧手女工，经纺线、煮染、浆线、打筒、经布、卷布、织布、脱浆、缩水、缝拼等十七道工艺精纺细作，生产出系列纯手工原生态产品。

The Dealer shall have the right whenever in the Dealer's sole discretion, the Dealer shall consider it necessary for the protection of the Dealer, because of margin requirements or otherwise, or, in the event that a petition in bankruptcy, or a petition for the appointment of a receiver, is filed by or against the Client or, when an attachment is levied against the account of the Client with the Dealer, or, in the event of the death or judicial declaration of incompetence of the Client, to: satisfy any obligation the Client may have to the Dealer (either directly or by way of guaranty or suretyship) out of any property belonging to the Client in custody or control by the Dealer, sell any or all positions long in the Client's account, buy any or all positions which may be short in such account, and, cancel any outstanding orders in order to close the account or accounts of the Client, all without demand for margin or additional margin, notice to the Client, the Client's heirs, executors, administrators, legatees, personal, representatives or assigns, of sale or purchase or other notice or advertisement and whether or not the ownership interest shall be solely the Client's or jointly with others.

当交易商按其全权酌情决定权认为基於按金需求或其他原因而有必要保障交易商，或客户提出或被提出破产或委任破产管理人之呈请时，或客户在交易商之账户被扣押时，或客户死亡或法庭宣布无行事能力时，则交易商有权：以交易商为客户保管或控制之任何属於客户之财产偿还客户直接或以保证或担保形式所欠交易商之任何负债，沽售任何或全部客户账户内之买空位置，买入任何或全部有关账户之沽空位置，及取消任何未执行之交易指示以结束客户之账户。以上行动均毋须要求按金或要求增加按金，亦毋须向客户，客户之继承人，遗嘱执行人，遗产管理人，遗产继承人，个人代表或承让人发出买卖通知，其他通知或公布，不论客户是否独自拥有或共同拥有有关业权。

The Company shall have the right whenever in the Company's sole discretion, the Company shall consider it necessary for the protection of the Company, because of margin requirements or otherwise, or, in the event that a petition in bankruptcy, or a petition for the appointment of a receiver, is filed by or against the Client or, when an attachment is levied against the account of the Client with the Company, or, in the event of the death of judicial declaration of incompetence of the Client, to: satisfy any obligation the Client may have to the Company (either directly or by way of guaranty or suretyship) out of any property belonging to the Client in the custody or control of the Company, sell any or all positions long in the Client's account, buy any or all positions which may be short in such account, and, cancel any outstanding orders in order to close the account or accounts of the Client, all without demand for margin or additional margin, notice to the Client, the Client's heirs, executors, administrators, legatees, personal representatives or assigns, of sale or purchase or other notice or advertisement and whether or not the ownership interest shall be solely the Client's or jointly with others.

当公司按其全权酌情决定权认为基於按金需求或其他原因而有必要保障公司，或客户提出或被提出破产或委任破产管理人之呈请时，或客户在公司之帐户被扣押时，或客户死亡或法庭宣布客户无行事能力时，则公司有权：以公司为客户保管或控制之任何属於客户之财产偿还客户直接或以保证或担保形式所欠公司之任何负债沽售任何或全部客户帐户内之买空位置，买入任何或全部有关帐户之沽空位置，，及取消任何未执行之交易指示以结束客户之帐户。以上行动均毋须要求按金或要求增加按金，亦毋须向客户、客户之继承人、遗嘱执行人、遗产管理人、遗产继承人、个人代表或承让人发出买卖通知、其他通知或公布，不论客户是否独自拥有或共同拥有有关业权。

This chapter holds China as a host country.(1) It analyzes the data concerning FDI in China and import and export of foreign investment companies, concluding that the foreign investment companies in China have large-scale internal trades.(2) After analyzing the traits of processing trade itself, the development history and traits of processing trade in China, a conclusion is drawn that a large amount of internal trades are contained in the processing trade. It also analyzes the impact of this internal trade on the import and export trade, international balance and international industrial competitive in China.(3) After analyzing the technological structure, absorbent, innovation of FDI utilization in China, the strategy of "exchange market for technology" and pollution concerning the technology introduction, some conclusions are drawn that many severe problems, such as the low-leveled technology introduction structure, low popularizing and innovating rate of technology, market occupation of foreign products, pollution accompany foreign investment, are all have close relationship with the motives and functions of the internal trade.(4) According to the problems and their influences internal trade have on China, suggestions are put forward that China should control internal trade through transferring price, localization and policies attracting foreign investors.

从中国作为东道国的角度，（1）通过对中国引进FDI及外商投资企业进出口贸易的实际资料的多视角分析，得出结论：中国境内的外商投资企业的内部贸易规模是巨大的；（2）通过分析加工贸易本身的特点、我国加工贸易的发展历程、我国发展加工贸易的特点，得出结论：我国利用FDI中的加工贸易包含着大量的内部贸易，并通过实际统计资料，分析了外商加工贸易中内部贸易对我国进出口贸易、国际收支平衡和国际产业竞争力的影响；（3）通过对我国利甩FDI中所引进技术的结构、消化和创新以及&以市场换技术&战略和技术引进中的环境污染等方面的分析，得出结论：技术引进结构低下、技术的传播、波及和创新效应低下、外商产品对中国市场的挤占、外商投资企业所带来的环境污染等重大问题都与跨国公司的内部贸易的动机和功能有关；（4）针对跨国公司内部贸易所产生的种种问题及影响，分析了中国重点应从转移价格、当地化和吸引外资政策三个方面对内部贸易进行管理。

According to the wire electrode on the trajectory of the different forms of control, WEDM can be divided into three types:* is a copy-control, cutting their lines in advance to create the shape of the workpiece and the same mode *, When the rough machining parts and die at the same time * Clamping in the machine tool table, in the process of cutting wire electrode tightly * close to the edge of model for mobile track, thus cutting out the model * with the same shape and precision to work; another One is the optical tracking control, the cutting in line before the first parts in accordance with drawings by a certain ratio of enlarge depicts an electro-optical tracking maps, drawings will be processed when the machine electro-optical tracking placed on the stage, followed on the stage The first photo has to follow the ink line graphics track movement, and then through the use of electrical, mechanical linkage to control the machine tool table work together with the relative electrode wire Xiang Sixing do sports in order to cut out the pattern and shape of the workpiece to the same; a re - Is a digital process control, advanced digital automatic control technology, machine-driven process in accordance with the geometry of the workpiece before the parameters of good pre-processing CNC automatic completion of the processing, production do not look like without drawing board also plans to enlarge, in front of more than two Control in the form of higher precision processing and broad scope of application, at home and abroad for more than 95% of WEDM have been using digital technology.

根据对电极丝运动轨迹的控制形式不同，电火花线切割机床又可分为三种：一种是*模仿形控制，其在进行线切割加工前，预先制造出与工件形状相同的*模，加工时把工件毛坯和*模同时装夹在机床工作台上，在切割过程中电极丝紧紧地贴着*模边缘作轨迹移动，从而切割出与*模形状和精度相同的工件来；另一种是光电跟踪控制，其在进行线切割加工前，先根据零件图样按一定放大比例描绘出一张光电跟踪图，加工时将图样置于机床的光电跟踪台上，跟踪台上的光电头始终追随墨线图形的轨迹运动，再借助于电气、机械的联动，控制机床工作台连同工件相对电极丝做相似形的运动，从而切割出与图样形状相同的工件来；再一种是数字程序控制，采用先进的数字化自动控制技术，驱动机床按照加工前根据工件几何形状参数预先编制好的数控加工程序自动完成加工，不需要制作模样板也无需绘制放大图，比前面两种控制形式具有更高的加工精度和广阔的应用范围，目前国内外95％以上的电火花线切割机床都已采用数控化。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐