视

Third, the discussion of the corresponding relationship of the real angles to the apparent real angles is performed, the asymptotic bias and MSE of real angles are given. Fourth, based on above conclusions, the analysis of two typical cases is made by numerical analysis and computer simulation: Case A when the impinging signals are divided into desired signals and interfering signals: it is shown that similar to Cyclic estimation of DOA, the smaller the separation between interfering direction and signal direction, in general, the smaller the estimation variance.

首先，研究了无穷快拍时信号数目有误的最大似然估计，引入了视在真实角度的概念；其次，导出了视在真实角度最大似然估计大样本时的分布以及渐近均方误差的解析表达式，而且还证明了：Stoica性能分析结果是现在的分析结果在信号数目准确时的特例；第三，讨论了真实角度与视在真实角度的关系，给出了真实角度的渐近偏和渐近均方误差；第四，依据前面的结果，利用数值分析和模拟实验的方法对两种典型情况做了分析： 1 在入射信号被分为干扰信号和所需信号情况下：结果表明：与CyclicDOA估计一样，干扰方向与所需信号方向靠的越近，所需信号估计的方差越小，越远离，方差越大。

Methods fifty-five accommodative esotropic children were divided into two groups randomly. group a, full correction group, 28 children were provided with spectacles of entire correction after cycloplegia. group b, synoptophore group, 27 children's refraction was done after cycloplegia, when pupil came back, observed the effects of different diopter to strabismus, visual function and etc in synoptophore test.

55例调节性内斜视患儿，随机分为两组。a组：全矫组，28例，麻痹睫状肌后行远视全矫配镜。b组：同视机组，27例，麻痹睫状肌待瞳孔恢复后，在同视机上观察不同矫正镜片对斜视度、视功能的影响，选择达到双眼最佳融像、眼正位的度数配镜。

Objective To investigate the clinical features, causes of blindness and diagnosis of Vogt Koyanagi Harada syndrome Methods The data of 157 patients with VKH syndrome were reviewed and analyzed Patients were carefully examined with slit lamp, ophthalmoscope, three mirror lens, fundus fluorescein angiography, indocyanine green angiography and HLA typing Results Headache was noted in 73 5% of these patients Simultaneous involvement of both eyes occurred in 80 8% of these patients Chroiditis,papilledema and edema of the retina adjacent to the optic nerve were noted in 100% of these patients in the posterior uveitis stage, whereas recurrent granulomatous anterior uveitis (98 4%),"sunset glow" fundus (95 8%) and Dalen Fuchs nodules (71 2%) were the common ocular findings in the recurrent anterior uveitis stage The common causes of blindness were papillitis, exudative retinal detachment and complicated cataract in the posterior uveitis stage, anterior uveal involvement stage and its recurrent stage Poliosis (36 3%) and alopecia (35 0%) were the most common extraocular findings Early irregular patches of fluorescence, followed by localized hyperfluorescent spots were the typical findings of FFA Dilation of choroidal vessels and leakage of ICG from the choroidal vessels were the common ICGA findings The prevalence of HLA DR4 and HLA DRw53 in patients (54 9% and 71 8% respectively) was significantly higher than that in controls (14 7% and 38 2% respectively) Conclusions VKH syndrome is characterized by chroiditis, papillitis or neuroretinitis in the posterior uveitis stage, followed by a generalized uveitis with a typical recurrent granulomatous anterior uveitis Extraocular findings and relevant examinations including FFA, ICGA and HLA typing are helpful to the diagnosis of VKH syndrome

目的探讨Vogt-Koyanagi-Harada综合征患者的临床特征、盲目原因及诊断等有关问题。方法对在1996年1月至2000年12月间就诊资料完整的157例VKH综合征患者进行回顾性分析，并对裂隙灯、眼底镜、三面镜、荧光素眼底血管造影(fundus fluorescein angiography，FFA)、吲哚青绿血管造影(indocyanine green angiography，ICGA)及人类白细胞抗原分型等检查结果进行分析。结果 VKH综合征最常见的前驱症状为头痛(102例，73.5%)，双眼同时患病118例(80.8%)；后葡萄膜炎期眼部主要表现为脉络膜炎、视乳头及附近视网膜水肿(100.0%)；前葡萄膜炎反复发作期眼部表现为复发性肉芽肿性前葡萄膜炎(128例，98.4%)、晚霞状眼底改变(95.8%)及Dalen-Fuchs结节(71.2%)；后葡萄膜炎期、前葡萄膜受累期及前葡萄膜炎反复发作期导致盲目的主要原因分别为视乳头炎、视网膜脱离及并发性白内障；毛发变白(36.3%)及脱发(35.0%)是最常见的眼外表现；炎症活动期FFA典型表现为斑驳状高荧光，ICGA发现脉络膜血管扩张、通透性增高等改变；VKH综合征患者HLA-DR4及HLA-DRw53的阳性率(54.9%及71.8%)显著高于正常对照组(14.7%及38.2%)。结论 VKH综合征患者在后葡萄膜炎期眼部典型表现为双侧脉络膜炎、视乳头炎或神经视网膜炎，随后出现以反复发作的肉芽肿性前葡萄膜炎为特征的全葡萄膜炎。眼外症状及相关的辅助检查包括FFA、ICGA 及HLA分型等有助于VKH综合征的诊断。

According to the users' requirement and visualization target of ocean information extraction, a visualization modeling system for ocean remote sensing information extraction is designed which includes its software structure, users' requirement use-case structure, class structure and flow-chart representation using the unified modeling language and object-oriented analysis method. The related flow definer and flow attemperment are designed and implemented.

根据海洋遥感信息提取可视化建模应用需求，以用户可视化模型建立及流程设计实现为目标，采用统一建模语言UML面向对象分析方法，设计海洋遥感信息提取可视化建模系统软件结构、用户需求用例结构、类结构及流程图表示法，同时完成流程定义器、流程调度的设计和实现。

For these two effective focal lengths, the spots on the image surface at zero view field, 0.7-view field and full view field are all inside the airy disc. The system MTF curve of each effective focal length are accordance with the corresponding diffraction limits curve. The biggest wave aberration is smaller than 1/4 wave lengths. The maximum field curvature and maximum f-theta system distortion respectively satisfies the precision demand of the laser marking machine in China.

系统像面在0视场、0.7视场和全视场的光斑都落在相应的爱里斑以内，系统的MTF曲线接近相应的衍射极限曲线，最大波像差小于四分之一波长，系统的最大场曲和最大f-theta相对畸变都很好地满足了国内激光打标机的精度要求。

The near point of convergence is the cloest point a target can be bifixated without diplopia.

9集合的近点是指双眼注视固定视标时，不发生复视的最近的视标所在的位置。

METHODS: Visual acuity, eye movement and diplopia of 45 patients with diplopia were examined, and blood biochemical examination and image diagnosis were performed to analyzed the cause of diplopia.

对复视患者45例进行视力、眼位、眼球运动及复视检查，并进行血液生化和影像学检查，分析复视的发病原因。

Chapter 4 proposes the attributed context-free grammar description, transformation methods and framework of organization based on windows of visual languages in a human-computer interface, which provides a reasonable theoretical basis and methods for the description, expanding production and automatic erasion of visual languages and the design of a visual human-computer interface.

第四章提出了人机界面中可视语言的上下文无关属性文法描述、变换方法及基于窗口的组织结构，为可视语言的描述、扩展生成、自动擦消及构造可视人机界面提供了有力的理论依据及描述方法。

C. Escher and Japanese planar design sponsorFustian. And it analyses the logo and connotation to show us it is a bridge whichbetween looker and framer.

通过这篇文章让我们明白，应该对错视的基本原理和分类有清晰的认识，对错视图形的类型及它的表现力和艺术感染力有准确的把握，对平面设计中错视图形的趣味性有更深层次的理解。

Abstract］ objective to investigate the clinical effect of esculin and digitalisglycosides eye drops for asthenopia after lasik.methods 100 eyes of 50 cases were given esculin and digitalisglycosides eye drops to treat asthenopia,compared with matched control subjects（100 eyes） of asthenopia and amplitude of accommodation.results in one and two weeks after lasik, esculin and digitalisglycosides eye drops were more effective compared with matched control subjects.conclusion esculin and digitalisglycosides eye drops are effective and safe for treatment of asthenopia after lasik.

目的 观察七叶洋地黄双苷滴眼液治疗lasik术后视疲劳的疗效。方法运用七叶洋地黄双苷滴眼液治疗lasik术后病人50例100眼，以视疲劳的自觉症状及眼调节幅度为观察指标，与对照组进行对比。结果术后1周及2周时七叶洋地黄双苷滴眼液治疗组较对照组主观症状及眼调节幅度有明显改善。结论七叶洋地黄双苷滴眼液治疗lasik术后视疲劳安全有效。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。