The relationship between stress and strain of concrete in prestressed concrete bridge s is written as algebraic form within load duration and the equilibrium equations of internal force and compatibility conditions are introduced.

首先將預(yù)應(yīng)力混凝土橋梁中考慮收縮www.91sese婷、徐變影響的任意時刻混凝土應(yīng)力欧美一区欧美一区、應(yīng)變關(guān)系在持荷時段內(nèi)寫成代數(shù)形式免费黄色视频在线观看不，引入內(nèi)力平衡方程及變形協(xié)調(diào)條件后免费一级A级高清毛片人妻，提出了計入截面上鋼筋位置、配筋率青草中文字幕乱码在线网站、預(yù)應(yīng)力鋼筋松弛www.欧美鲁鲁色.com、混凝土彈性模量隨時間變化等影響的徐變效應(yīng)分析的全量形式自動遞進法免费A级毛片91无码A∨，并建立了計算式恶亚洲黄色电影免费看，適用于任何形式的收縮、徐變特性表達式1024亚洲欧洲无码日韩；基于建立的全量形式公式热玖玖久久天堂，可方便地求解任意時刻混凝土、鋼筋的應(yīng)力與應(yīng)變和梁體豎向變形爆乳精品国产福利在线。

Necessary and sufficient conditions for the equilibrium of a coplanar system of force couples: the algebraic sum of their moments has to be zero.

平面力偶系合成結(jié)果還是一個力偶欧洲的免费黄色网站，其力偶矩為各力偶矩的代數(shù)和。

At the same time, this thesis focuses on the theoretical research on the LBGK method and discusses the inner relation between the LBGK and the N-S equations.The relationship among the selection of velocity group , the forms of equilibrium distribution functions,and the macroscopic N-S equations is clearly revealed.LBGK method has many advantages, such as easy dealing with the complex boundary conditions and high amenability to parallel computing.

本文系統(tǒng)地總結(jié)了各種LBGK模型国产亚洲人成网站在线观看4，特別是對LBGK模擬二相流和多相流模型進行了認真地研究老牛精品在线影视；同時從新的角度對LBGK進行了理論研究，用全新的方法探討了LBGK和N-S方程的本質(zhì)聯(lián)系欧美50岁熟妇一级毛，清晰地揭示了速度族的選擇超碰在线播、平衡態(tài)分布函數(shù)的形式和宏觀NS方程三者之間的關(guān)系。

By the budgetary estimate of the water and heat conditions at the glacial equilibrium line and the water balance of lakes in the area of the West Kunlun Mountains during the late stadial of the Last Glaciation. before the summer mean temperature decreased by 1.5 C, the annal mean precipitation was 10-20% more than that of the present. As the summer mean temperature lowering was over 1. 5 C, the precipitation was decreased and the negtive of the lake water balance appeared.

文中還根據(jù)對西昆侖山區(qū)冰川零平衡線處水熱狀況及湖泊水量平衡狀況的推算原创国产AV新春下药表，指出末次盛冰期中你懂得的视频，在夏季溫度降低1-1.5℃以前，其年降水量應(yīng)大于現(xiàn)代值国产人澡人澡澡澡人碰视频，增加量大約在10-20％左右xxxxx欧美性爱；在夏季溫度降低值大于1-1.5℃以后，其降水減少黄色一级片网址免费，湖泊水量平衡出現(xiàn)負值偷拍一区↓，這與冰川、湖泊變化的地質(zhì)記錄所反映的早期冷濕综合自拍、中期冷干氣候條件相符国产精品亚洲视频。

The conditions for the global asymptotic stability of the equilibrium point are expressed as the stability of the some decomposed matrix.

這種方法以矩陣分解為工具，結(jié)合平衡點的漸進穩(wěn)定判據(jù)一a一级级毛片免费看看，用分解矩陣的穩(wěn)定性決定平衡點的全局漸近穩(wěn)定性免费黄污网站。

Furthermore,conditions for the uniform persistence of disease and conditions for global stability of the disease-free equi- librium and the endemic equilibrium are obtained by Liapunov method and by analyzing the property of flow on the boundary,respectively.

進一步討論了疾病持續(xù)存在與無病平衡點和地方病平衡點全局穩(wěn)定的條件。

We show that a supercritical Hopf bifurcation will occur under some conditions by using the density dependent rate in immature prey population as bifurcation parameter. Sufficient conditions which guarantee the uniform persistence and global stability of boundary equilibrium are also obtained.

我們以幼年食餌個體之間的密度制約率作為分支變量得到在一定條件下將出現(xiàn)超臨界Hopf分支曰夲少妇精品A片在线，并得到了系統(tǒng)一致持續(xù)生存和邊界平衡點全局漸近穩(wěn)定的充分條件igao视频激情在线。

The equilibrium P-T conditions of the spinel lherzolite xenoliths in the study area are: T=913~1045℃, P=13~22kb corresponding to depths of 45~83 km. The P-T conditions suggest that the geothermal gradient of the upper mantle beneath the study area is approximately similar to oceanic geotherm which may be caused by asthenosphere upwelling.

本研究尖晶石二輝橄欖巖之平衡溫度大致介於913℃1045℃之間，平衡壓力則介於13kb~22kb，深度大約介於 45km~75km 之間日本加勒比人人操人人爱人人操人人爱，其溫壓范圍大多接近於大洋地區(qū)之地溫梯度日韩福利短片在线观看网站免费，此相對較高之地溫梯度可能與軟流圈之上涌有關(guān)。

Considering a spherical porous carbon particle immersed in a static ambient atmosphere, the combustion characteristics under three basic conditions: frozen flow, equilibrium flow, partial flow are solved in a half-analytical and half-numerical way. By using the LAEA (Large Activation Energy Asymptotic Method), the departure value of some parameters such as combustion rate, temperature, and concentration are obtained. On this basis, the rules of a carbon particle combustion under various conditions when the gas phase Damk〓hler number is in the range of 0,+∞ are summarized.

建立氧化性環(huán)境中相對靜止的多孔炭粒燃燒的控制方程亚洲精品视频在线观看你懂的，采用半解析亚洲第一性爱高清视频、半數(shù)值方法求解出炭粒在凍結(jié)流、部分流日韩高清自拍AV网址、平衡流三種基本情況下的燃燒規(guī)律狼友网址手机免费观看，并采用大活化能漸近匹配方法，計算出偏離凍結(jié)流男人舔女人下面视频、偏離平衡流情況下燃燒速率91亚洲精品视频在线观看、溫度及組分濃度等參數(shù)的偏離解，進而總結(jié)出炭粒在氣相Damk〓hler數(shù)為0国产一级A片免费视频性开放，∞整個范圍內(nèi)燃燒特性變化規(guī)律日韩毛片无码一区二区三区。

In this paper the optimal conditions for sublimate crystallization refining of pyromellitic dianhydridewas studied,and on the basis of PMDA equilibrium vapor pressure under the contant temperature,the mathematical correlation for sublimate crystallization conditions was deduced.

研究了均苯四酸二酐凝華結(jié)晶精制的最佳條件，并以均酐在定溫下的平衡蒸汽壓為基礎(chǔ)性生活爱爱网址，推導(dǎo)出凝華結(jié)晶條件數(shù)學(xué)關(guān)系式欧美黄片视频免费观看。