查询词典 preliminary design

The research of this thesis is under the circumstances that the international shipping center of Shanghai builds Yangshan deep water port project, first of all, through its SWOT analytical method analyze Shanghai maritime affairs situation, maritime affairs office existing boat policy, Yangshan deep water port hydrometeorological situation, analyze the present main ship type, to explain the background of the choice the ship the small waterline, to put forward the necessity of building small water-plane area twin hull maritime affairs patrol ships. Then, it introduces the principle, characteristic of the small waterline, and has analyzed the domestic and international state of development of the SWATH ship, and conclude that it is feasible to build SWATH maritime affairs patrol ship technical, through the research and analyze of design at home and abroad,; Then it analyzed the application of the SWATH ship in maritime affairs manage both at home and abroad, put forward the preliminary scheme, and carry on research to the economic performance of technology of the scheme, through putting forward the preliminary model of plan of design to main yardstick and selecting type of host computer finally after relatively optimize, and confirm design specifications .

本文的研究是在上海国际航运中心建设核心工程洋山深水港的大前提下，首先，通过利用SWOT分析方法分析了上海海事局面临的形势，对上海海事局现有航政管理船舶现状进行分析，对洋山深水港海域的水文气象情况进行了调研，对当前主要船型进行分析，对选择小水线面船的背景加以阐述，提出建设小水线面双体海事巡逻船的必要性：接着，对小水线面船的原理、特点加以介绍，并对小水线面船国内外发展状况进行了分析，对国内设计建造小水线面双体海事巡逻船的技术可行性进行了研究分析，得出国内设计建造小水线面双体巡逻船在技术上是可行的；然后对国内外应用于海事管理等工作的小水线面船型进行分析，提出初步的方案，并对方案的技术经济性能进行研究，通过对主尺度和主机选型等进行比较优化后最终提出初步的设计方案模型，并确定设计任务书。

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。

In this thesis, downstream energy dissipation and erosion control problem of Yingping power station is studied in the concrete, building the unitary hydraulic model in the laboratory. The scale of this model is 1:40. The energy dissipation effect of this layout in preliminary design is validated and optimized by model experiment. During the test, setting assistant energy dissipation training frusta is put forward and the energy dissipation problem of the project is well settled.

本文以阴坪水电站消能防冲问题为具体研究对象，在实验室建立几何比尺为1：40 的正态水工整体模型，对其初步设计的消能布置方案的消能效果进行模型试验验证与优化研究，提出了设置辅助消能工导流墩的方案，很好地解决了该工程的消能防冲实际问题。

The application of HAZOP analysis for surface engineering construction in gas field was discussed too, combined with HAZOP analysis example for surface engineer construction in gas field was discussed too, combined with HAZOP analysis example for surface engineer preliminary design of production test in Longgang gas field.

并结合龙岗气田试采地面工程初步设计HAZOP分析实例，对HAZOP分析方法在气田地面工程建设中的应用进行了初步分析。

Li Yong'an, Three Gorges Project welcomed in three milestones in 2003, namely water filling of the reservoir, operation of the ship lock and power production of the generating unit; and further in September 2005, the 14 sets of hydro-turbine generating unit (700MW each) of the left-bank powerhouse were all connected on-line for power production; and in May 2006, approximate 10 months ahead of the preliminary design schedule and 2 years ahead of the expectation of the flood control performance, the Three Gorges Dam was completed and fully reached to its designed crest elevation of 185m, able to impound water with the whole structure of dam.

历任清江水电开发公司总经理兼湖北省人民政府副秘书长，中国三峡总公司副总经理。在李永安先生的领导下，长江三峡工程于2003年实现了蓄水、通航和发电三大目标，2005年9月左岸电站14台700MW水轮发电机组全部投产发电，2006年5月三峡主体工程大坝全线到达185米设计坝顶高程，具备全线挡水能力，工期比初步设计工期提前约10个月，提前两年发挥防洪能力。2006年10月，三峡水库蓄水至156米。

Then, a preliminary design study on the subsystems of a new linac is presented.

否则，它所产生的放射性将阻碍人们对机器必要的手工维护或损坏机器元件，而使机器不能正常运行。

At the stage of preliminary design for ship structure, an expert system is urgently needed to configure on its own the midship section of a specified ship type and, according to a particular classification society's rule s, to determine and optimize the structural scantlings in order to timely prepar e the relevant bidding materials.

在船舶结构初步设计阶段，极需一种专家系统针对所选船型的中剖面进行自主构思，按某一船级社规范确定其构件尺寸，并进行结构优化，以便及时提供有关报价资料。

Taking the rapid transit from Tianjin to Binhai New Area for example, this article gives a description of the preliminary design, construction organization and budget estimate making for the track-laying on viaducts, and makes a comparison with the actual field construction to explore the construction organization of slab track of the rail transit system and performs a cost analysis thereof.

以天津市区至滨海新区快速轨道交通工程为例，阐述高架桥梁铺轨初步设计施工组织及概算编制，并与实际施工对比，探讨城市轨道交通工程无碴轨道施工组织及费用分析。

The use of the method as a preliminary design tool is demonstrated in a case study on the selection of batteries for mobile phones.

移动电话蓄电池选择的具体案例研究表明，所提出的电源选择方法可以作为一种初步设计工具。

However, it has been amply demonstrated that, in the case of slider crank mechanisms, the PRBM analysis yields fairly accurate results (within 2% of nonlinear finite element analysis results) [9]. We will use the PRBM for this preliminary design study.

然而，充分的证据显示，这种滑动曲柄机械结构，也就是对PRBM的分析已经取得了相当精确的结果（非线性有限元素的分析结果在2%之内）我们要利用PRBM的这一初步设计中的研究成果。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。