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Second, we consider the strongly coupled elliptic system with homogeneous Dirichlet boundary conditions. The prior estimates for thesolution of nonlinear elliptic system are derived. It is shown that there is no coexistence state if diffusion rates are strong, or if the intrinsic growth rates are slow.

第二章研究带齐次Dirichlet边界条件的强耦合椭圆系统,首先推出非线性椭圆系统解的先验估计,然后证明了当食饵和捕食者的扩散率足够大,或者出生率足够小时,系统不存在共存现象,并给出半平凡解存在的充分条件。

The streptomycin perfusion of labyrinth via a fenestra of LSC could treat disabling Meniere's disease and other dizziness caused by inner ear disorder by selectively destroying the sensory epithelium of utricular macula and three canal cristae.

经水平半规管开窗链霉素迷路灌注术可以通过选择性破坏椭圆囊斑和三个半规管腹壶嵴感觉上皮根治难治性梅尼埃病和其它内耳疾病引起的眩晕或头昏。

The optimization result shows that the maximal attack area is an ellipse of 17 km half long axis and 10 km half short axis, and it is better than the conclusion of a lot of simulation researches aiming at this warhead, and it can offer reference for further design of reentry trajectory.

优化结果表明,最大可攻击区范围是一个长半轴为17 km,短半轴为10 km的椭圆区域,此结果优于针对该弹头进行的大量弹道仿真所得的结论,可为进一步弹道设计提供参考依据。

In the rest of this dissertation, we apply our above abstract results,"global Morse theory"and other critical point theorems to some semilinear resonant elliptic boundary value problems as well as some asymptotically"linear"or super"linear"p-Laplacian equations, and obtain the existence or multiplicity of solutions.

在后半部分,我们运用上面的抽象结果,以及大范围Morse理论和其他临界点理论,研究一些半线性椭圆共振问题的多重解的存在性,以及一些渐近线性或超线性p-Laplacian方程的解的存在性或多重性。

Firstly, the eigenvalue problem of a class of second order elliptic equation with critical potential and indefinite weights is considered. Then, using critical point theory, Trudinger-Moser inequality and the properties of the first eigenvalue, we prove the existence of a nontrivial solution for a class of nonlinear elliptic with critical potentialand indefinite weights in R~2. Secondly, we prove the existence of nontrivial solutions for a class of subcritical and critical elliptic systems with indefinite part in R~2 byusing a generalized linking theorem, Trudinger-Moser inequality and concentration-compactness principle.5. The existence of at least three weak solutions for discrete boundary value problem is established by using a three critical point theorem introduced by Ricceri.

首先,讨论了R~2中一类带不定权且含临界位势的二阶椭圆型方程的特征值问题,并借此特征值问题的第一特征值性质,利用山路引理及Trudinger-Moser不等式,证明了R~2中一类带不定权且含临界位势的非线性椭圆型方程非平凡解的存在性;其次,利用广义环绕定理,Trudinger-Moser不等式及集中列紧原理,得到了R~2上一类具有强不定部分的半线性椭圆型方程组在非线性项分别为次临界增长和临界增长情形下非平凡解的存在性。

By Visual Basic 6.0 program, taken the distance between hole 200mm and buried depth 120~150mm as the optimization goal, the most optimum parameters range of the mechanism was obtained as follows: the initial angle between planet frame and the line formed from spraying-fertilizer needle-tip and planet wheel axle was -45°~-40°, the initial angular displacement of planet frame was 40°~50°, the distance between spraying-fertilizer needle-tip and the planetary gear axle center was 280~300mm, simultaneously, the semi-major axis of elliptic gear was 29.364mm, the teeth quantity was 23, the ratio of semi-minor axes and semi-major axis was 0.958, the radius of circular gear was 25mm.

对该机构进行运动学分析,建立了数学模型,以穴距200mm和入土深度120~150mm为寻优目标,应用Visual Basic 6.0软件编程得出满足机构运动要求的最优参数范围为:喷肥针尖和行星轮轴连线与行星架的初始夹角-45°~-40°、行星架初始角位移40°~50°、喷肥针尖与行星轮轴心距离280~300mm,此时椭圆齿轮长半轴29.364mm、齿数23、短半轴与长半轴比0.958,正圆齿轮半径25mm。

On the one hand, we improve the mixed having and ternary method to express n from the standard non-singular elliptic curve with character 2. On the other hand, we improve the mixed binary and ternary method to express n from the standard elliptic curve with character more than 3 , and we generalize the mixed binary, ternary and quinary method to express n.

一方面从特征是2的有限域上的标准非奇异椭圆曲线的角度出发,改进了n的半点和三进制的形式;另一方面从特征大于3的有限域上的标准椭圆曲线的角度出发,改进了n的二进制和三进制的混合形式,并推广到n的二进制、三进制和五进制的混合形式。

(1) In common cavity malformation, in addition to the abnormal bony labyrinth such as the cochlea, vestibule and lateral semicircular canal, the inner ear perceptive organ such as the saccule, utricle and scala media were also abnormal.(2) Though we could not identify the basal membrane and sensory epithelia under micro-endoscopy, the utricle and saccule could be clearly identified.(3) During cochlear implantation in common cavity malformation, electrode insertion should be monitored under micro-endoscopy, the electrodes should be put close to the anterior wall of the cavity, otherwise the vestibular organ may be damaged.

(1)共同腔畸形极重度聋患者不仅前庭、外半规管和耳蜗的骨性结构形态发生了变化,而且腔内耳蜗中阶与前庭的球囊、椭圆囊的膜迷路结构形态也发生了变化;(2)微窥镜下分辨不出基底膜或听神经细胞的形态结构,可见畸形前庭的球囊、椭圆囊的囊性结构;(3)进行共同腔畸形人工耳蜗植入手术时,应在耳蜗内镜的监视下,将电极摆放到准确位置,尽可能贴近共同腔的前壁,不应损伤前庭器官。

In order to probe the relationships between wave equation offset domain common image gathers/angle domain common image gathers with migration velocity, we quantitatively derive the changes of ODCIGs and ADCIGs along with migration velocity on the assumption of uniform velocity medium with a horizontal reflector. We come to conclusion that ODCIGs are hyperbolas with half offset; on the contrary, they are ellipses. Combined with the results of depth focusing analysis, we find the apparent incident angles in ADCIGs are larger than the real incident angles when the migration velocity is larger than the true one and vice versa. With lower migration velocity, the residual moveout on ADCIGs is an ellipse with the tangent of apparent incident angle; otherwise, it's a hyperbola.

为了得到波动方程偏移距域共成像点道集和角度域共成像点道集与偏移速度的关系,在匀速单层水平反射情况下,对ODCIGs和ADCIGs随偏移速度的变化进行了定量的推导,得到偏移速度偏小时ODCIGs与半偏移距成双曲关系,反之成椭圆关系;结合深度聚焦分析,得到偏移速度偏大时ADCIGs中视入射角大于真入射角,反之,小于真入射角;在速度偏小时,ADCIGs上剩余时差与视入射角的正切值成椭圆关系,反之成双曲关系。

Because of the secular perturbation variations of the ascending node right ascension, the argument of perigee and the mean angle caused by the initial deviations of the semi-major axis, the inclination and the eccentricity are linear time-variant, then the active biases of the semi-major axis, the inclination and the eccentricity can realized the self-stabilization design of the elliptical orbit satellite constellation, and so the configuration stability will be improved.

通过初始偏差对椭圆轨道卫星的长期影响分析可知,轨道半长轴、倾角和偏心率的初始偏差对升交点赤经、近地点幅角和平近点角的长期摄动变化是线性的,因此通过主动偏置轨道半长轴、偏心率和倾角能够实现椭圆轨道星座构型的自稳定设计,从而提高其构型稳定性。

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Plunder melds and run with this jewel!

掠夺melds和运行与此宝石!

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻,也许正是在通往天国的路上,我体验着这白色的晕旋。

When you click Save, you save the file to the host′s hard disk or server, not to your own machine.

单击"保存"会将文件保存到主持人的硬盘或服务器上,而不是您自己的计算机上。