In addition, the absolute/convective instability is studied, and the governing region in the parameter plane is declared. It is shown that the absolute instability may become predominant when the electric field or the surface tension is sufficiently large.

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In our study the average of closure ratio was 0.85, Bowen ratiowas used to evaluated the change of energy component on the soil condition of paddy field, the results showed this ratio will be changed when soil tension was 40 centibar during the maximum tillage stage of rice.

而由探討土壤水分狀態(tài)影響能量項的變化色天堂人妻有码精品，當水稻最高分蘗期一日本道久久久精品国产麻豆，土壤張力值約40千巴時，潛熱和可感熱的比值逐漸改變欧美视频黄色视频。

With its basis on city attraction-φ and adoption of surface tension in physics, a math model about the floating population in city is established in this paper. This model takes the coacervation and escape of the molecule as the inflow and outflow of the population, the electric field intensity as the policy, and the electric conductivity in electrolytic solution as the enforcement of the policy.

以φ-城市吸引力為依據(jù)日韩人在线视频A片免费观看，借用物理學中"表面張力"的概念，把分子的凝聚和逃逸理解為人口的流進與流出国产清纯白嫩极品爽爽，把電場強度理解為城市的政策国产亚洲白对白精品店、法規(guī)、法令日本wwwwwwwwww，把電解溶液的電導率理解為對政策、法規(guī)18岁禁看网站在线看、法令的執(zhí)行情況免费18岁网站，建立了城市流動人口的數(shù)學模型。

G. Lekhnitskii and the Hankel integral transformation are used, And thereby a solution of the Stress field and displacement field of an embedded penny-shaped crack lying in a transverely isotropic plane under the action of the uniform tension stress at the far end perpendicular to the crack surface is obtained.

本文利用對于橫觀各向同性體軸對稱變形時應力函數(shù)解法的基本方程AV在线免费观看那，并應用Hankel積分變換看真人性爱视频，求解了位于橫觀各向同性平面內的埋藏圓片裂紋在垂直于裂紋面遠處均勻拉應力作用下的應力場和位移場，獲得了與各向同性材料相同的應力強度因子操一操网站，不同于各向同性材料的應力場和應變能釋放率裂精品日韩妖精视频网站在线观看免费。

The influence of high temperature and high pressure on foaming agent's properties in opened and closed system, and influence of the change of foaming agent's properties on foaming capacity and foam stabilizing capacity are also studied. The multiple regression theory is used to establish the quantitative characteristic functions of foaming agent versus temperature and pressure. Based on the Gibbs Principle, the quantitative characterization is carried out on relation of foam system's free energy versus its surface tension, surface area and concentration, and the analysis of energy concluded that the disintegration of the foam is inconvertible. At the same time, the influence of change of foam's shape and structure on distribution of reservoir temperature and pressure is qualitatively described, and the coupling mechanism between temperature field, pressure field and chemical field is systematically expounded.

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When the magnetic field direction is parallel to the Wilhelmy plate,the surface tension increases with increasing magnetic field strength.

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What is significant is that when magnetic fluids present saturation magnetization in magnetic field with uniform,and at the same time,gravity and magnetic forces counteracts in magnetic field with uniform gradient,the surface tension of magnetic fluids wil...

這一發(fā)現(xiàn)使我們在地面上能經濟的亚洲日韩专区网站、方便的、長時間的制造流體的小區(qū)域微重力環(huán)境亚洲中文字幕精品久久HD，為研究微重力狀態(tài)下的流體科學操逼亚洲色、生命科學，材料加工和器件開發(fā)等提供了新的方法欧美黄色乱轮。

The distribution uniformity of external magnetic field is weakened by the cylindrical coil with some thickness ferric-core. The model of fluid flow and heat transfer of spot GTAW pool in longitude magnetic field controlling is developed for the first time, which incorporates the free surface, surface tension gradient, additional fluid drive forces owing to the external longitude magnetic, heat transfer between weld pool and medium, latent heat of solid/liquid phase and heat physical properties of materials.

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The main research tasks and results are as follows:(1) Through comparing the stress intensity factor of compact tension specimen calculated by finite element software with the theoretical value, the feasibility of calculating fracture parameters of crack tip in ABAQUS software was verified.(2) The relationship between the elastic modulus of the material and research scale was studied based on deriving the cohesive stress theory and other relevant theories. And the elastic modulus of the material on meso-scale was determined.(3) Global model and sub-model of the finite element were built in th...e macro-scale, and stress-strain field nearby the crack tip was analyzed, and the results show that the detailed stress-strain in the crack tip could be obtained by using the sub-model technique.(4) In meso-scale, the crack growth model was also established by assuming the crack propagating along the grain boundary, and the detailed stress-strain field in the crack tip was obtained.(5) The effect of crack length on Von Mises stress, and maximum principal stress and strain was analyzed in meso-scale when equivalent KI equals 30MPa.m1/2. And the results show that except for crack tip area, the stress-strain distribution in whole specimen is not affected.

主要完成研究內容和取得成果如下：(1)利用有限元軟件計算出緊湊拉伸試樣的裂紋尖端應力強度因子KI值，其結果與理論值一致啊灬啊灬高潮来了视频在线观看，從而驗證了利用ABAQUS計算裂紋尖端相關斷裂參量的可行性欧美三级视频观看；(2)在研究內聚應力等相關理論的基礎上，推導出了研究尺度與材料彈性模量的近似關系女性视频网站,色，并確定了介觀尺度上的彈性模量免费无码不卡视频在线观看；(3)在宏觀尺度上建立了全局有限元計算模型和子模型，得到了裂紋尖端應力應變場分布插插爽视频，結果表明利用子模型技術獲得比較準確的裂紋尖端應力應變場分布是可行的天天搞天天日天天操；(4)在介觀尺度上利用平均晶粒尺度的方式建立了裂紋沿晶擴展模型，得到了裂紋尖端斷裂過程區(qū)的微觀應力應變場国产偷自区；(5)當應力強度因子為30MPa.m1/2時久久久久免费视频a片，分析了介觀尺度上在裂紋沿晶擴展過程中裂紋長度對Mises應力、最大主應力和應變的影響欧美日韩另类，結果表明性爱网址在线观看，裂紋擴展長度對試樣整體應力應變分布影響不大，而對裂紋尖端區(qū)域有較大影響色色色色色色色色色色色色；(6)介全彩H漫无遮挡全彩3D。。。

The development of low-tension fluorescence materials of Field Emission Display and nanometer zinc oxide have been briefly summarized in the paper . Zinc oxide was thought to be a good low-tension fluorescence materials .

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