Advanced numerical simulations were introduced in soil water research,such as finite analysis method,characteristic finite element method,and alternating direction finite element method.

土壤水研究的數(shù)值模擬方法也有一些突破，如有限解析法日韩成人作爱在线视频播放网站、特征有限元法中日韩精品高清在线视频播放网站、交替方向有限元法等久久国产精品免费一区二区三。

Shadow effect can not be neglected for thermal analysis of spacecraft,Accroding to the angle between solar light and antenna orbit plane and its orbit location,analytical geometry method was used for accurately calculating solar radiation heat flux distribution of reflector surfaces.To analyze the temperature field under heat flux,the formulations of net radiation flux density between two gray elements and the net flux density of gray surface under external thermal flux were deduced.Based on the characteristic of space environment,the nonlinear temperature distribution in transverse direction of reflector shell self radiation were considered,the finite element formulations were given for orthogonal material layered shell by Galerkin method.A layered element including a inner heat source layer was proposed,and the finite element formulation expressed by DOF of the inner heat source layer were put forward with temperature and heat flux boundarys between adjacent layer.

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The relationship between acoustic wave direction,laser incident angle,and laser diffraction angle of TeO2 acousto-optical deflector with acoustic frequency was analyzed based on the TeO2 crystal acousto-optical characteristic and Dixon equations under abnormal Bragg diffraction.

根據(jù)晶體的聲光特性以及反常布喇格衍射的Dixon方程操操干操干，得出了氧化碲聲光偏轉(zhuǎn)器在反常布拉格衍射條件下的參量矢量關(guān)系。分析了超聲波方向18禁美女裸体黄色网站、入射光角度手机看片1024乱伦、衍射光角度與聲波頻率之間的關(guān)系。

In this thesis, we take the delay r as a bifurcation parameter to investigate the Hopf bifurcation phenomenon in system (1). By analyzing the associated characteristic transcendental equation of system (2), and using the Hopf bifurcation theorem, we obtain one condition for the existence of Hopf bifurcation in system (1). Furthermore, based on the center manifold theorem and the method of normal form, some interesting results about the properties of Hopf bifurcation are obtained, including the direction of Hopf bifurcation and stability of Hopf bifurcating periodic solutions.

我們以時(shí)滯T作為分支參數(shù)免费色网，研究了系統(tǒng)(1)的Hopf分支現(xiàn)象：通過分析系統(tǒng)(2)的特征超越方程多人操逼视频，結(jié)合利用Hopf分支定理獲得了系統(tǒng)(1)的Hopf分支存在的一個(gè)條件；利用中心流形定理和正規(guī)形方法分析了系統(tǒng)(1)的Hopf分支的性質(zhì)国内特一级A片黄片，包括分支的方向和分支周期解的穩(wěn)定性亚洲一区免费观看。

Based on image statistical characteristic, the algorithm can search automatically the boundary start-point using Sobel operator and special template operation, then according to the connection status of every boundary point in its 8-connection neighbor field, seek automatically the search direction, form the whole data collection of a target boundary outline.

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According to the principle of A-O interaction and quartz′s different characteristic in the direction of parallel and perpendicular acoustics field, with a quarter-wave plate being inserted in an AO Q-switch Nd∶YAG laser cavity between mirror and Q-switch, AO Q-switch′s Bragg diffraction efficiency formula is put out theoretically. Consequently, the conclusion has been drawn by calculating simulation that the ability of a single AO Q-switch′s switching CW Nd∶YAG laser is increased.

結(jié)合聲光相互作用理論和聲光介質(zhì)熔石英在平行和垂直于聲場(chǎng)的兩個(gè)方向具有不同聲光優(yōu)值的特性手机在线免费看黄色片网站，理論推導(dǎo)了腔內(nèi)引入四分之一波片后聲光Q開關(guān)的布喇格衍射效率公式超碰地址，計(jì)算模擬得出引入四分之一波片能夠有效地提高聲光Q開關(guān)關(guān)斷連續(xù)Nd∶YAG激光的能力。

According to the principle of A-O interaction and quartz＇s different characteristic in the direction of parallel and perpendicular acoustics field, with a quarter-wave plate being inserted in an AO Q-switch Nd : YAG laser cavity between mirror and Q-switch, AO Q-switch＇s Bragg diffraction efficiency formula is put out theoretically.

結(jié)合聲光相互作用理論和聲光介質(zhì)熔石英在平行和垂直于聲場(chǎng)的兩個(gè)方向具有不同聲光優(yōu)值的特性日本女孩高潮，理論推導(dǎo)了腔內(nèi)引入四分之一波片后聲光Q開關(guān)的布喇格衍射效率公式欧美A特级人成视频，計(jì)算模擬得出引入四分之一波片能夠有效地提高聲光Q開關(guān)關(guān)斷連續(xù)Nd：YAG激光的能力。

The second is that the characteristic of time and direction of ME is poor.

二是德育教學(xué)的時(shí)代性黄网欧美日韩一区、針對(duì)性不強(qiáng)欧美综合自拍亚洲综合第一页。

In the end this paper concludes the technical characteristic and development direction of the latest environmental impact assessment modeling software.

無(wú)論哪一種軟件系統(tǒng)，都需要對(duì)環(huán)境現(xiàn)狀質(zhì)量做出確切的評(píng)價(jià)美女裸体日韩成人网站大全，從而準(zhǔn)確地對(duì)未來(lái)環(huán)境污染進(jìn)行預(yù)報(bào)欧美老妇性野外久久。

Ni6 cluster is an octahedron belonging to Oh point group. Its 3Eg orbital presents strong negative exchange coupling and has a trend of antiferromagnetic couplings. Ni5 cluster is of three-side pyramidal structure belonging to point group C3v. The magnetic moment direction of Ni atom lying on vertex of the pyramid is antiparallel to the moment direction of the Ni atoms lying on underside of the pyramid, which present the characteristic of ferrimagnetic couplings.

具有Oh點(diǎn)群對(duì)稱的八面體原子簇Ni6的3Eg軌道上存在很強(qiáng)的負(fù)交換耦合一级AAAAAA大黄片，呈現(xiàn)反鐵磁耦合趨勢(shì)；具有C3v點(diǎn)群對(duì)稱的三邊金字塔結(jié)構(gòu)的原子簇Ni5位于塔頂點(diǎn)的Ni原子與基面上的Ni原子磁矩方向相反欧美性爱网站在线免费，但大小不等国产醉酒迷奷系列在线观看，呈現(xiàn)出亞鐵磁交換耦合特征。