For analyses of causer and countermeasure on cracking of con crete,a holistic methodology related to design,production of concrete,practice even management should be adopted according to peculiarity of engineering and environmental condition.

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When analyze the stability of slopes, traditional methods often use suppose that the failure surface is circular or other typical functions.

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ZL03 2 354312.The innovations include: automatic self-closing and reliably sealed valve structure: the design of duplex valve clack with pilot valve to tackle the problem of reverse seal structured valve being difficult to be opened; an automatic drain control device to automatically drain the remaining water from the hydrant; protective plate provided between the hydrant body and the valve block to serve as a connection between the hydrant body and the valve block, which is the first one to be damaged when the ground hydrant is clashed, and prevent pulling-off of the whole above-ground part of the fire hydrant, so as to properly protect the main parts from any damage. The self-closing and reliably sealed valve now prevents drain of water, and only the damaged protective plate is needed to be replaced before immediate re-operation. Thus the repair work after clashing is very easy and simple.

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Open flowers with corolla longer than calyx, tube slender, 2-lipped, lower lip 3-lobed, upper lip erect and 2-lobed; stamens exserted; style longer than stamens. Cleistogamous flowers with corolla shorter than calyx; stamens and style shorter than corolla.

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Accurate understanding and calculating the total fracturing fluid leak-off coefficient is both key problem to the fracturing design and the important matter to the analysis after fracturing.

準(zhǔn)確認(rèn)識和計算壓裂液綜合濾失系數(shù)，既是壓裂施工設(shè)計中的一個關(guān)鍵問題日韩视频欧美在线一区，也是壓后分析評估的一個核心內(nèi)容福利亚洲资源网站av。

This method overcome the problems of many supposition conditions in theory and difficulty in searching critical slip surface in 3D limiting equilibrium analysis; It uses the 3D FEM\'s stress field directly, differs from the practical value of 3D FEM strength reduction method used hypothesized load, and differs from the characteristic of the FEM with limiting equilibrium theory still to need to divide the columniation, and suppose the critical slip surface in advance.

該方法克服了三維極限平衡分析方法在理論上引入較多假設(shè)條件，且搜索臨界滑裂面困難的問題涩涩网站免费看；它直接采用三維有限元應(yīng)力場国产美女在线观看精品，不同于三維有限元強(qiáng)度折減法基于虛擬荷載上得出的實(shí)用價值；同時異于沿用極限平衡理論的有限元法仍需要進(jìn)行條柱劃分26uuu国产电影一区二区，并事先假設(shè)滑裂面形狀及位置的缺點(diǎn)聚色色色色色色。

The design mainly works on many factors which effecting the volume efficiency of fracturing pump. These factors are working conditions of the pump,imbibitional valve,expulsive valve,clearance volume,sealing property, condensability of influent, liquid leakage and elastic defletion of pump cylinder. Based on these facors, we should induce the efficiency expression, famulate differential eguation and emulational mathematical model of fracturing pump.

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Capsule cylindrical, coniform, or ovoid, sometimes curved, dehiscent from top, septicidal; valves thick or thin, straight or twisted.

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And the keytechniques are in the following:(1) The algorithm and program of intensified node arrangement near crack tip andalong crack line (2) The shape function calculation of point near crack based on visibility criteria (3) The contour integral method for calculation of stress intensify factor K_ⅠK_Ⅱ(4) The rock slope appraisal method using circular method, polygonal method orgraph theory method depending on the slope joints combination

程序?qū)崿F(xiàn)的關(guān)鍵技術(shù)和算法如下：(1)沿裂隙結(jié)點(diǎn)布置及裂尖結(jié)點(diǎn)加密的算法及程序(2)采用可視準(zhǔn)則的形函數(shù)算計算程序(3)圍線積分計算復(fù)合型裂紋裂尖強(qiáng)度因子K_Ⅰ国产盗摄一区二区三区厕所视频、K_Ⅱ的算法及程序(4)圓弧搜索法、折線搜索法和無網(wǎng)格—圖論搜索法的算法及程序

Perianth subglobose, hemispheric, or urceolate, 5-parted or -lobed, slightly fleshy or herbaceous; segments abaxially thickened or becoming winglike or hornlike, rarely not modified, adaxially concave or cucullate.

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