Then the responding and flow disturbing characteristics of the valve are studied by means of both linearized analysis and numerical simulation. At last the performances are compared with the conventional ones and the influences of the clearance between spool and valve casing are also discussed.

第二章提出了利用閥芯的雙運(yùn)動(dòng)自由度及毛細(xì)阻尼管沿程壓力特性設(shè)計(jì)流體控制元件的基本思想av在线你懂得，并敘述了按該思想設(shè)計(jì)的流體換向閥免费看一级人妻片、流量控制閥及壓力閥的工作原理和性能特點(diǎn)污污视频免费在线18。

Based on the analysis of physics course of heat transfer, the mathematical model of single-phase flow in the rectangular narrow channel is proposed. And the boundary conditions are given to get the unique numerical result. The finite volume method is used to found the discrete scheme of equations. According to the flow of SIMPLER arithmetic, the computing program is developed and the correctness of program is validated.Then the program is used to solve the problem of flow and heat transfer in rectangular narrow channel.The stable two dimension velocity and temperature fields in rectangular narrow channel and plate fuel are obtained.

在明確窄縫流道及燃料板換熱物理過(guò)程的基礎(chǔ)上一特级黄片视频，建立了描述矩形窄縫內(nèi)單相流動(dòng)與換熱問(wèn)題的數(shù)學(xué)模型91自拍偷拍网站，并給出了合理的邊值條件欧美亚洲日韩免费在线视频；然后利用有限容積法對(duì)方程進(jìn)行離散，根據(jù)SIMPLER算法的流程編制了模型求解程序曰本Xⅹ；在驗(yàn)證程序正確性的基礎(chǔ)上激情AAAA片，對(duì)矩形窄縫流動(dòng)與換熱問(wèn)題進(jìn)行了求解，得到了矩形窄縫流道和板狀燃料元件內(nèi)部溫度場(chǎng)亚洲一区欧美日韩、速度場(chǎng)的二維分布免费网站日本永久免费观看。

Focusing on this practical engineering problem and by researching on some relative enterprises, this article intends to describe the dust generation mechanism, diffusion rules, control technology of dust by means of theoretical analysis and numerical simulation in coal washery, and put forward a comprehensive plan of dust control which takes bag filter as main dust removal equipment, and make an optimal design of air delivery and positioning, to realize the optimal control of dust.

針對(duì)這一工程實(shí)際問(wèn)題，通過(guò)對(duì)相關(guān)企業(yè)的調(diào)研1024欧美性爱视频，本研究對(duì)選煤廠中粉塵產(chǎn)生機(jī)理免费看一级A片裸体舞、擴(kuò)散規(guī)律及控制技術(shù)進(jìn)行理論分析和數(shù)值模擬；并提出以除塵器為主要設(shè)備的粉塵治理綜合方案在线黑人黄色网站，并對(duì)其風(fēng)量国产在线视频在线国国产、安裝位置等工藝參數(shù)進(jìn)行工程設(shè)計(jì)，以實(shí)現(xiàn)對(duì)粉塵的最優(yōu)化控制黄色视频免费网站免费。

The calculation mechanics model is used for the curtain wall decussate rope net structure, including m horizontal ropes and n vertical ropes. The balance and displacement equations, alse the potential energy and kinetic energy equations, are constituted for the points with distributive loads and tensile force after the rope net distortion. Using the theory of finite analysis method, these groups of the n horizontal ropes' 2m+5 and m vertical ropes' 2n+5 equations are founded and the numerical solution is calculated.

建立幕墻由m根橫向索国产免费A片又爽又舒服、n根豎向索組成的正交索網(wǎng)結(jié)構(gòu)的計(jì)算力學(xué)模型，在網(wǎng)點(diǎn)分配荷載及預(yù)張力作用下免费的乱婬视频播放网站，列出鋼索變形后的平衡方程自拍偷拍无码视频、位移方程和彈性變形位能與外力作功方程，用有限分析方法將豎向索包含n個(gè)由2m+5變?cè)M成的非線性方程組国产精品对白一区二区三区，將橫向索包含m個(gè)由2n+5變?cè)M成的非線性方程組尋求數(shù)值解成人黄色视频网站。

The method of finite element discrete and optimal parameter back analysis is adopted.(3) Concentrated on the question of high external water pressure of the deep-lying tunnel, the basic theory and method calculating external water pressure are systematically studied.(4) Based on Jinping cascade 2 hydropower station, numerical simulation rain infiltration of seepage field under different drainage pattern and grouting pattern are studied, also, the high external water pressure is analyzed and studied and some seepage control measures are put forward.

2采用有限元離散—優(yōu)化法進(jìn)行參數(shù)的反演分析；(3)針對(duì)深埋隧洞的高外水壓力問(wèn)題久久久打桩机，進(jìn)一步分析和研究了襯砌水荷載及外水壓力的作用機(jī)理和計(jì)算方法国产人人爱；(4)以錦屏二級(jí)水電站深埋長(zhǎng)引水隧洞作為本文的主要研究對(duì)象国产视频一区二区三区污视频，采用考慮降雨入滲滲流場(chǎng)分析的方法對(duì)排水方案和灌漿封堵方案不同情況下的滲流場(chǎng)的水頭分布進(jìn)行了數(shù)值模擬在线观看国产经典福利片，并對(duì)其外水壓力進(jìn)行了分析和研究，提出了滲流控制的具體措施第一区第二区日韩。

Then triaxial elastic finite element model was made through ANSYS software for U-type die holder with numerical simulating analysis and proofread of stress and strain.

在精度要求高時(shí)深爱激情综合网，這種精沖模架可實(shí)現(xiàn)一次精密成形，大大降低勞動(dòng)強(qiáng)度日韩精品无码专区中文字幕，提高勞動(dòng)生產(chǎn)率又粗又猛又黄又爽的视频，是一種先進(jìn)而實(shí)用的加工方法男人扒开女人下部添高潮的视频。

In order to perfect the theoretical system of "tectonic control of hazard", this thesis researches the control function of stratum inclination of monoclinic structure, fold shape and angle between two limbs of fold, normal fault direction of dip and fault inclination, forms of faults combination over coal-mining-induced subsidence by means of theoretical analysis and numerical testing.

為了進(jìn)一步完善&構(gòu)造控災(zāi)&理論體系，本文從典型煤礦區(qū)的地質(zhì)條件和開(kāi)采實(shí)際出發(fā)国产一级婬片A片AAA毛片香蕉，在以往研究成果的基礎(chǔ)上最新毛片在线看，通過(guò)理論分析和計(jì)算機(jī)數(shù)值試驗(yàn)，重點(diǎn)研究單斜構(gòu)造的地層傾角欧美一区区三区视频、褶皺構(gòu)造形態(tài)及其翼間角先锋影音每日资源色先锋、正斷層傾向和傾角及斷層組合對(duì)采煤沉陷的控制作用。

The numerical simulation result is competent, and can provide important reference for the design of die and drawing technology. It is showed that finite-element method can save much time and cost. It is a useful tool for engineering analysis.

模擬結(jié)果表明yinyuan国产精品，有限元數(shù)值模擬方法可以節(jié)省大量的費(fèi)用和時(shí)間黄色视频在线免费亚洲，能夠?yàn)槔罟に囋O(shè)計(jì)及模具設(shè)計(jì)提供重要的參考依據(jù)，不失為工程分析的一種有效數(shù)值模擬工具最好看的免费观看视频97。

The following are the results: 1. An abstract meteorological phase parallel model for numerical weather prediction is developed as follows:〓 In this equation, parallel wall clock time related with computing grid numbers, load imbalance, communication and synchronization overhead is given out. It can be used to design and analysis the parallel algorithm.

該研究工作的主要結(jié)果如下： 1 發(fā)展提出了一個(gè)適用于氣象數(shù)值預(yù)報(bào)模式的階段并行模型MPPM：〓它表明了并行計(jì)算時(shí)間與數(shù)值模式的計(jì)算格點(diǎn)量在线观看h一区、負(fù)載平衡因子、通信開(kāi)銷在线视频A片、同步開(kāi)銷及并行開(kāi)銷等之間的關(guān)系国产妇女黄色网站，為設(shè)計(jì)和分析數(shù)值預(yù)報(bào)模式的并行算法提供了理論依據(jù)。

In this paper, I have constructed models for local population and metapopulation dynamics. Then by mathematical analysis and numerical simulation, I focus my studies on the relation between the Allee-like effects at the metapopulation level and the Allee effects at the local population level and their impacts on the stability of ecological systems.

在本文中天天一级免费看，通過(guò)建立局域種群和集合種群的理論模型亚洲精品黄色中国，把局域種群動(dòng)態(tài)和集合種群動(dòng)態(tài)結(jié)合起來(lái)，用數(shù)學(xué)分析和數(shù)值模擬分析的方法研究了集合種群水平上的似Allee效應(yīng)與局域種群的Allee效應(yīng)之間的關(guān)系以及它們對(duì)生態(tài)學(xué)系統(tǒng)穩(wěn)定性的影響99热精品久久，并對(duì)含Allee效應(yīng)的物種的自然保護(hù)提供了理論依據(jù)777琪琪午夜理论电影网在线。