This technique is used for the axisymmetric magneticstatic problems and the result is good. In the second example of the forth chapter, the error of the third–order Asymptotic Boundary Condition is lower than that of the second-order Asympototic Boundary Condition.

第五章針對(duì)這一問(wèn)題国产导航在线看欧美，進(jìn)一步對(duì)漸近邊界條件進(jìn)行了推導(dǎo)，分析了一些特殊電荷和電流分布情況下湿穴影院，電位wwwcom亚洲97、標(biāo)量磁位和矢量磁位的多極矩展開(kāi)式中各極矩項(xiàng)的性質(zhì)。

Moreover, the quasi-analytical expressions of the relative concentrations at the mobile region and the immobile region are deduced respectively by using Bessel equation, Bessel function and the method of Laplace transform under the initial concentration zero and the first or second boundary condition of a semi-infinite one-dimensional space.

并分別在初始濃度為零人看看人人摸人人操，半無(wú)限一維空間內(nèi)第一類(lèi)邊界條件和第二類(lèi)邊界條件下人人看人人看，利用Bessel方程、Bessel函數(shù)和Laplace變換法推導(dǎo)出了可動(dòng)區(qū)和不動(dòng)區(qū)溶質(zhì)相對(duì)濃度的準(zhǔn)解析表達(dá)式99久久国产一级特片无码。

We can not apply Galerkin methods with radial basis functions to the first boundary value problem (the Dirichlet boundary value problem) of the second-order elliptic equation, because it requires that the approximate functions should fit the essential boundary condition, while the spaces spanned by the radial basis functions fails to satisfy this kind of boundary condition, and it is the same for the higher-order elliptic equation.

我們不能直接應(yīng)用這樣的無(wú)網(wǎng)格算法求解二階橢圓型方程的第一類(lèi)邊值問(wèn)題(Dirichlet邊值問(wèn)題)在线观看免费黄色网站，因?yàn)榈谝活?lèi)邊界條件是本質(zhì)邊界條件(對(duì)二階橢圓型方程為Dirichlet邊界條件)，而徑向基函數(shù)的支集通常是全空間起碰在线免费视频，由它們所生成的近似函數(shù)空間一般不滿足這樣的條件亚洲黄色免费观看。

The quasi-analytical expressions of the relative concentrations at the mobile region and the immobile region are deduced respectively by using hypergeometric equation, hypergeometric function and the method of Laplace transform under the initial concentration zero and the first or second boundary condition of a semi-infinite one-dimensional space.

并分別在初始濃度為零，半無(wú)限一維空間內(nèi)第一類(lèi)邊界條件和第二類(lèi)邊界條件下电影一级特黄片，利用超幾何方程婷婷五月丁香九月、超幾何函數(shù)和Laplace變換法推導(dǎo)出了可動(dòng)區(qū)和不動(dòng)區(qū)溶質(zhì)相對(duì)濃度的準(zhǔn)解析表達(dá)式。

Second order incident boundary condition on fixed incident boundary is derived for numerical simulations, based on the cnoidal or sinusoidal motions of wave maker paddle, which shows that the prediction with second order incident boundary condition is more accurate than the prediction with first order incident boundary condition. 2 The analytical solution for higher-order Boussinesq equations is derived and its applicable range is discussed. 3 A 2-D fully non-linear numerical model using boundary element method is developed to obtain wave forces acting on rectangular obstacle. 4 The three-dimensional fully non-linear waves are studied in a numerical wave tank using finite element method.The studies on the coupled numerical model combined Boussinesq equations with Laplace equation are following.

非耦合非線性波浪計(jì)算模型：1 根據(jù)造波板做橢圓余弦運(yùn)動(dòng)或正弦運(yùn)動(dòng)速度欧美一二三四精品A片，推導(dǎo)出數(shù)值模擬波浪水槽時(shí)固定入射邊界上的二階波浪入射邊界條件国产综合在线观看视频，數(shù)值計(jì)算結(jié)果和實(shí)驗(yàn)結(jié)果的對(duì)比表明采用二階入射邊界條件對(duì)波面升高的預(yù)報(bào)比采用一階入射邊界條件對(duì)波面升高的預(yù)報(bào)更為精確；2 推導(dǎo)了波浪水槽造波板做正弦運(yùn)動(dòng)所產(chǎn)生波浪的高階Boussinesq方程攝動(dòng)展開(kāi)解析解欧美熟妇A片A区二区三区，討論了該解析解的適用范圍高潮流水抽搐免费视频在线；3 對(duì)整個(gè)波浪水槽應(yīng)用邊界元方法數(shù)值模擬了波浪對(duì)物體的非線性作用；4 用有限元法求解三維Laplace方程模擬了三維完全非線性波浪水槽人人艹97。

With the help of the fundamental theory to singular measure differential system, Green's function matrix expression of solution and well-posed boundary condition are given, together with discussing the properties of the Green's function matrix under the influence of impulsive effect In section 5, based on Lyapunov function method, we investigate that the existence of the first boundary value problem to second-order singular system by macthing the solutions to the second boundary value problem; and the existence and uniqueness of three-point boundary value problem to third order singular system by macthing the solutions to two-piont boundary value problem.

第五部分借助Lyapunov函數(shù)法亚洲观看一区二区三区，通過(guò)將第二類(lèi)邊值問(wèn)題的解對(duì)結(jié)成第一類(lèi)邊值問(wèn)題的解，得到了二階廣義系統(tǒng)的第一類(lèi)邊值問(wèn)題解的存在性国产精品视频综合区；通過(guò)將兩點(diǎn)邊值問(wèn)題的解對(duì)結(jié)成三點(diǎn)邊值問(wèn)題的解免费看很黄很黄A片夜色直播，得到了三階廣義系統(tǒng)的三點(diǎn)邊值問(wèn)題解的存在性和唯一性。

The modal tests of PCB and PCB assembly (free boundary condition and fixed boundary condition) were carried out. The equivalent elastic modulus and damping parameters of PCB can be gained, and the fixed boundary condition of finite element model was also determined. These will help to the following work.Second, drop impact tests of three different heights were carried out. Strains and acceleration responses of PCB were measured. Failed BGA packages of different test conditions were dyeing, and cross section analysis of failed solder joints was conducted.

針對(duì)JEDEC標(biāo)準(zhǔn)試件的局限性国产一级淫片A片AA片男，提出了設(shè)計(jì)便于統(tǒng)計(jì)學(xué)研究焊點(diǎn)可靠性的試驗(yàn)試件的構(gòu)想99re热免费视频，利用有限元模態(tài)分析方法確定并驗(yàn)證了用圓形PCB組件替代JEDEC標(biāo)準(zhǔn)試件的可行性；通過(guò)一系列模態(tài)試驗(yàn)和有限元模態(tài)分析永久免费黄色毛片，確定了圓形PCB組件的相關(guān)試驗(yàn)參數(shù)日韩一级欧美一级二级在线观看视频，這不僅為跌落碰撞下PCB組件有限元模擬確定了較為合理準(zhǔn)確的有限元模型，而且為正確地評(píng)價(jià)跌落碰撞下PCB組件的可靠性問(wèn)題奠定了基礎(chǔ)999日本男人天堂啊啊啊。2轮奸网站。

The modal tests of PCB and PCB assembly (free boundary condition and fixed boundary condition) were carried out. The equivalent elastic modulus and damping parameters of PCB can be gained, and the fixed boundary condition of finite element model was also determined. These will help to the following work. Second, drop impact tests of three different heights were carried out. Strains and acceleration responses of PCB were measured. Failed BGA packages of different test conditions were dyeing, and cross section analysis of failed solder joints was conducted. It was found in our drop tests that the root cause of lead-free solder joints under drop impact was the combined effect of mechanical shock and PCB bending vibration.

針對(duì)JEDEC標(biāo)準(zhǔn)試件的局限性，提出了設(shè)計(jì)便于統(tǒng)計(jì)學(xué)研究焊點(diǎn)可靠性的試驗(yàn)試件的構(gòu)想，利用有限元模態(tài)分析方法確定并驗(yàn)證了用圓形PCB組件替代JEDEC標(biāo)準(zhǔn)試件的可行性久草久草久草；通過(guò)一系列模態(tài)試驗(yàn)和有限元模態(tài)分析在线看黄色网站免费，確定了圓形PCB組件的相關(guān)試驗(yàn)參數(shù)，這不僅為跌落碰撞下PCB組件有限元模擬確定了較為合理準(zhǔn)確的有限元模型同人漫18禁福利网站，而且為正確地評(píng)價(jià)跌落碰撞下PCB組件的可靠性問(wèn)題奠定了基礎(chǔ)欧美日韩午夜情爱在线视频观看免费。

A numerical model was established by combining the seven-flux model of light propagation with the two-dimensional hyperbolic heat conduction model in cylindrical coordinates. It showed that there exists a great discrepancy between the results obtained by treating the laser irradiation as volumetric absorption (i.e. taking laser scattering and absorption into consideration) and those obtained by treating the laser irradiation as the second boundary condition.

將激光傳輸?shù)钠吡髂Ｐ团c圓柱坐標(biāo)系內(nèi)的二維雙曲型導(dǎo)熱模型相結(jié)合建立了理論模型；將激光照射處理為容積吸收(即考慮激光在生物組織中的散射和吸收)所得到的計(jì)算結(jié)果性受天堂，與將激光照射處理為第二類(lèi)傳熱邊界條件所得到的計(jì)算結(jié)果相比日韩免费精品视频，兩者差別很大；考察了激光照射下散射系數(shù)和吸收系數(shù)對(duì)生物組織內(nèi)雙曲型導(dǎo)熱的影響最新黄色网站在线入口。

In the first part, we discuss the properties of solutions of (0.1) system with dif-ferent diffusion coefficient and the second boundary condition. The stability of non-negative constant solutions is given, some prior-estimate of the positive steaystateare proved by using the maximum principle and lower-upper solutions, the non-existence of non-constant positive solution, the global exitence of non-constant pos-itive solution and bifurcation solution of non-constant positive steady-states areobtained.

第一章討論了系統(tǒng)(0.1)在擴(kuò)散系數(shù)不相同的情況下非負(fù)常數(shù)解的穩(wěn)定性国产黄色视频99视频，運(yùn)用極值原理，上下解方法確定了系統(tǒng)(0.1)正平衡態(tài)解的一些先驗(yàn)估計(jì)800毛片，然后討論了非常數(shù)解的不存在性日本一本区免费中文高清，非常數(shù)正平衡態(tài)解的全局存在性及非常數(shù)正平衡態(tài)的分歧解。