二维性

In Chapter 2,a steady permeability identification problem in elliptic equa-tions for two-dimensional orthotropic medium is considered.We construct afunctional,obtain its first and second Gateaux differential,and prove that thefunctional is strictly convex on a convex admissible function set.We seek to iden-tify the permeability by minimization of the above functional.

第二章研究了二维稳态正交异性介质的渗透率反演问题，我们构造了一个泛函，求得该泛函的一、二阶Gateaux微分，证明了它在一个凸的容许集上的严格凸性，并使用极小化泛函即变分方法来求解此问题。

First, based on all that have been mentioned above, the geometric constant D, which was introduced to characterize the quantitative difference between Birkhoff orthogonality and isosceles orthogonality, is studied further. Moreover, attainability as well as continuity and monotony of D in two-dimensional sequence spaces are presented.

基于上述原因，本文首先在已有结论的基础上，对用以刻画等腰正交和Birkhoff正交性之间量化差异的几何常数D进行了进一步的研究，解决了D的可达性，二维序列空间中D的连续性与单调性等问题。

Chapter 7 discusses a orientational classification principle of curve and surface. With this principle, we have accomplished the frame automate generation and a boolean operation between surfaces.

第七章描述了一个曲线、曲面的有向性分类原则，在ZD_ADM曲面造型系统中，运用此有向性分类原则，实现了二维轮廓线的自动生成和曲面间的布尔运算。

The aim of this paper is to study the existence of solution and multiply results for quasilinear elliptic system in bounded domain and the whole space, semilinear elliptic equation in two dimension space, second order nonlinear difference equation by variational methods. The main results are listed in the following:1. An abstract compactness theorem is proved, and then, under weak Boccardo and De.

本文主要利用变分法，分别研究了有界区域和全空间上拟线性椭圆型方程组、二维空间上半线性椭圆型方程和二阶非线性差分方程问题的解与多重解的存在性，具体内容如下： 1。

Contrast-enhanced Ultrasound(1) Renal occupied lesions: the contrast-enhanced imaging feature of renal cell carcinomas are multiformity. It was different in time of start-enhancing and start- expurgation and intensio.3 cases revealed wash-in contemporarily and 6 cases revealed wash- in quickly in time of start-enh ancing.In time of start-expurgating, 3 cases showed wash-out quickly, 3cases revealed wash-out contemporarily,3 cases showed wash-out slowly,6 cases revealed a higher contrast enhancement and 3 cases revealed a even contrast enhancement in enhancing intension; 4 cases with renal cyst s,outline had more clear and inside had no contrast media washing in and enhancing;3cases with renal angiomyolipomas washed in slowly,washed out slowly and equal or low enhanced ; 2cases with renal columnar hypertrophy were no outline appearance and the same enhancement and ech o as the nomal rena tissue.

超声造影诊断结果：(1)肾占位性病变：9例肾透明细胞癌，其超声造影表现多种多样，造影后肾脏恶性病灶造影开始增强的时间、开始廓清的时间及增强强度不等，在开始增强的时间方面，与正常肾皮质同时灌注增强的有3例，表现为快进的有6例，在开始廓清的时间方面，快退3例，同退3例，慢退3例，在增强的强度方面，6例病灶表现为高增强，3例为等增强表现；4例肾囊性病灶，超声造影轮廓较二维超声清晰，但内部始终未见增强；3例肾血管平滑肌脂肪瘤表现为慢进慢退，回声呈等、低增强表现；2例肾柱肥大超声造影无明显包块轮廓出现，造影增强的动态变化时间、强度与正常肾组织一致。

In this paper, heterotrophic index of Hanjiang River and water system of Changde City was analysed using fractal theory.

对常德和汉江的异养性指数进行了分形分析，表明异养性指数在二维空间分布具有自相似性。

Sex of arteriosclerosis of result lower limbs is out-of-the-way 2 dimension behave disease on supersonic image for pathological changes blood-vessel inside in film is shown irregular add thick, local show strong echo spot, and to hemal antrum inside protuberant, hemal antrum internal diameter shows irregular stricture, pathological changes paragraph solid sex is low it is thus clear that inside hemal antrum echo smooth group fills up; color much general straps blood stream to show resemble showing to; of blood stream signal is not had inside hemal antrum multilayer helix CTA shows pathological change paragraph hemal area does not have comparative agent, show what side raises artery to take travel and initiative place at the same time.

结果下肢动脉硬化性闭塞症二维超声图像上表现为病变血管内中膜呈不规则增厚，局部呈强回声斑，并向血管腔内突起，血管腔内径呈不规则狭窄，病变段血管腔内可见实性低回声光团充填；彩色多普勒血流显像显示血管腔内无血流信号；多层螺旋CTA显示病变段血管区域无对比剂，同时显示侧支动脉的走行及起始部位。

In a simulation environment,correlation,ba-lance,power spectrum and multi-address of m-sequence and chaotic sequence based on two-dimension mapping have been stu.

在仿真环境下，对比研究了m序列和基于二维logistic映射的混沌序列的相关性、平衡性、功率谱特性、多址性等性能。

The Iterative Learning Control must be used on a repeatable or a peridocital system. By using motion time and iteration times as the two orthogonal vectors, a two-dimensional control system is construct, which can discribe the attribute of the dinamic behavior and learning process completely.

反覆式学习控制必须应用於具有反覆性或周期性的系统，文中将以运动时间与学习次数作为二正交向量来架构二维控制系统，使其能够完整的描述控制系统本身的动态行为与学习过程的特性。

Associating with the reciprocity theorem, the second-order coupling scattered fields between the rough sea surface and a 2-D cylinder above it are calculated.

根据得到的表面电流及散射场，结合互易性定理求解了二维柱体同海面之间的二次耦合散射场。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。