查询词典 retardation method

In order to meet the demand of precise measurement and applications, the principle of phase retardation with oblique incident angle is expounded, based on the total-reflection phase transformation theory of the phase retardation. By means of Fresnel rhomb, the variation law of the phase retardation for rhomb-type retarder with the incident angle is analyzed. The result indicates that incident angle has obvious influence over the phase retardation.The phase retardation is sensitive to the incident angle, and also has close correlation to incident position of the incident ray, which is asymmetrical to the incident position of the incident ray.

为满足精确应用和测量的需求，从相位延迟的全反射相变理论出发，阐述了斜入射相位延迟原理，以菲涅耳菱体为例，分析了菱体型相位延迟器相位延迟随其入射角变化的规律性，结果表明：当光线非严格准直时，光的入射角对相位延迟量有明显的影响，延迟量不但对入射角变化敏感，而且还与入射光线的入射方位密切相关，呈不对称形式。

These results indicate that the dispersion effect of retardation films are not obvious, and the retardation characteristics of different retarders generated by the same material are almost the same, which would be useful to study how the color liquid crystal display is affected by dispersion effects of retardation films.

本实验得到的蓝光延迟量＝(1-3.5%)绿光延迟量；红光延迟量＝(1+2.6%)绿光延迟量，这为分析延迟膜的色散效应对彩色液晶显示所带来的影响提供了依据。

Main points of the thesis are as follows:(1) The main function models and information relations between these models in the CAPP system in the integrated CAD/CAM project are explained, a new process plan design method is mentioned based on analyses of process plan design. This method is based on the process plan prototype, and develops the prototype little by little until the perfect process plan is completed, the prospect of this method is discussed;(2) The feature abstracting rules and methods are studied, a feature coding system is developed based on GT, all the defined feature models are described by the mathematical methods;(3) The integrated method of CAD/CAPP based on features is mentioned, this method defines a feature exchanging model, and develops an interface software to exchange design data into technology data base, this technology data base includes the design and technology information of the parts;(4) The process plan reasoning method based on features is created, this method uses Mycin algorithm to solve the reasoning of the feature process plan. A process plan making system is developed. In this system part process plan is made by the semi-intelligent method, this method uses the feature reasoning, feature process chain searching and man-computer talking together;(5) The main structure of the HOPE system is introduced, a shaft drawing and its process plan made by this system are shown, the data process problem in process drawing making is also discussed;(6) A new method of describing process rule is introduced, this method uses IfThen rules and neural nets weight values together to describe process rules, the BP algorithm is adopted in this method;(7) The optimal machining sequence problem of the process steps on the same fixturing is discussed, optimal algorithms SA is applied to solve this problem, the result shows that this method is more efficient than the traditional method;(8) All jobs in the thesis are summarized. In order to carry out the research in the future, some rational proposals are given.

全文论述的内容主要有下列几个方面：(1)较为系统地阐述了CAD／CAM一体化工程项目中CAPP系统的主要功能模块及其信息流程，在分析工艺设计过程的基础上，提出了基于特征原型的渐进式工艺设计方法，并探讨了该方法的应用前景；(2)研究了零件特征提取的原则和方法，在成组技术的基础上，开发了一套基于特征的分类编码系统，并在提取零件特征的基础上，定义了零件特征的数据模型，开发了基于轴类零件特征的参数化设计系统；(3)研究了基于特征的CAD／CAPP集成的方法，通过定义零件特征数据模型的存储结构，开发了将设计数据转换到工艺数据库中的接口程序，为后续的CAPP系统提供必要的零件形状和工艺信息；(4)研究了基于特征的工艺推理方法，将Mycin算法应用到工艺决策中，开发了基于特征的工艺推理及工艺方案生成系统，在系统中综合运用特征推理、特征加工工艺链查询及人机对话相结合的半智能化方法确定零件加工工艺；(5)介绍了整个HOPE系统的总体结构，通过运行HOPE系统绘出了一轴类零件的零件图，并生成了该零件的加工工艺方案，初步探讨了基于特征的工序图生成技术中数据处理问题；(6)研究了工艺设计过程中知识如何有效表示的问题，提出了将显式的IF-THEN规则表示与隐式神经网络权值表示相结合的工艺知识表示方法，并利用BP算法进行了工艺知识表示的初步研究；(7)研究了工艺设计过程中同一安装下工步优化排序问题，利用神经网络中基于模拟退火的理论来解决该工步优化排序问题，实践证明该方法较传统的算法具有更高的效率；(8)总结了本文所进行的研究工作，为今后进一步开展工作提出了较为合理的建议。

In this paper Ⅰ successfully applied these methods to fault diagnosis, and presenting some new innovative machinery fault diagnosis method; First Ⅰ present a new gear wornout fault diagnosis method, this method use the vibration signal's time-frequency attribute and instantaneous phase undulation to accurately detect gear's fault, and by comparing with the traditional frequency domain analysis method, this method reveals that many nonlinear and nonstationary characteristic exist in gear's vibration, this tell us that if we use frequency domain analysis method without pay attention to the signal's characteristic, we could get wrong diagnostic result; Then Ⅰ present a new bearing fault diagnosis method, this method use ATVFD and Hilbert transform to do envelop demodulation,Ⅰ analyze the envelop with time-frequency method and find out that this method is more accurate then traditional method.Ⅰ also explain that the modulation of the fault to the carrier wave may also be non-stationary and nonlinear; Finally Ⅰ present a cylinder pressure measurement method of diesel engine by means of vibration, cylinder pressure is an important parameter of diesel engine fault diagnosis, the pressure measuring is simplified a lot by this method,Ⅰ also use the ATVFD and time-frequency analysis to realize it.

本文中将上述理论方法成功地应用到故障诊断中去，提出了几点创新性的诊断方法；提出了一种齿轮磨损故障诊断的新方法，该方法利用振动信号能量的时频域分布特征与瞬时相位波动特征可以进行精确的齿轮故障诊断，并通过与传统的频域诊断方法的比较，揭示出齿轮振动中存在的明显的非线性与非平稳特征，说明了不加选择地利用频域分析方法进行齿轮故障诊断很可能会得到错误的诊断结果；提出了一种轴承故障诊断的新方法，该方法利用ATVFD分解与Hilbert变换进行包络解调，并对解调得到的包络信号进行时频域分析，可以实现更加准确轴承故障诊断，说明了故障对载波信号的调制往往也是非平稳与非线性的；提出了一种利用振动信号进行柴油机汽缸内压力检测的新方法，柴油机汽缸压力的变化是柴油机故障诊断的重要参数，利用振动方法可大大简化汽缸压力的检测过程，该方法也是综合利用ATVFD分解与时频域分析方法实现的。

Other features include birth weight, growth and growth retardation, mental retardation, small head, round face, low ears, eyes from too broad, muscle tight low-end, on epicanthus, palm, and so on.

其它特点还包括出生时体重轻、生长及发育迟缓、智能不足、小头、圆脸、低位耳、眼距过宽、肌肉紧结性低、上眦赘皮、断掌等。

GCV: Daily 5–15mg/kg, a daily intravenous injection of 2, sharing 2 - 3 weeks. 3, if not cure another pregnancy, CMV can cause the fetus through the placenta of intrauterine infection, caused by microcephaly, growth retardation, mental retardation and sensory nerve deafness and so on.

3丙氧鸟苷：每日5–15mg/kg，每日2次静注，共用2–3周。3、如果不治愈再怀孕，CMV可通过胎盘造成胎儿宫内感染，引起小头畸形，生长发育迟缓，智力障碍和感觉神经性耳聋等。

Mental retardation is the most common developmental disability affecting 2–3% of the population, a consequence of a wide range of genetic or nongenetic etiologic factors. The cause of mental retardation remains unknown in about 50% of cases.

弱智是影响人群中2-3%人口的最普遍的发育残疾，这种病由多种基因和非基因的病因引起。50%的弱智原因不明。

The main clinical manifestations are persistent polyuria, thirst and polydipsia due to the consequence of dehydration, which can results in some severe complications such as shock, mental retardation, growth retardation and pyelectasis.

临床上主要表现为脱水所致的多饮、多尿和烦渴等症状，若不能及时诊治，可以导致一些严重的并发症，如休克、智力障碍、生长发育迟缓、肾盂积水等并发症；若同时合并头颅鞍区肿瘤以及腺垂体功能低减等，则会危及患者的生命。

The category is designed to include a group of children with severe mental retardation (IQ below 50) who show major problems in hyperactivity and in attention, as well as stereotyped behaviours. They tend not to benefit from stimulant drugs (unlike those with an IQ in the normal range) and may exhibit a severe dysphoric reaction (sometimes with psychomotor retardation) when given stimulants. In adolescence, the overactivity tends to be replaced by underactivity (a pattern that is not usual in hyperkinetic children with normal intelligence). This syndrome is also often associated with a variety of developmental delays, either specific or global.

因有下述特徵则作此诊断：出现注意力不集中及过动行为的重度智能不足（智商低於 50 ）；给予兴奋性药物治疗并不能改善此类儿童的情况，反而可能会有情绪低落反应在少年期少动行为常取代过动行为（这种情况在正常智商的过动儿童并不常见），同时常并发特定或全面的发展迟滞。

4 Except as provided in paragraph 2, where a determination of threat of injury or material retardation is made a definitive anti dumping duty may be imposed only from the date of the determination of threat of injury or material retardation, and any cash deposit made during the period of the application of provisional measures shall be refunded and any bonds released in an expeditious manner.

除了上述第2款的规定以外，如果在作出损害威胁或者严重阻碍的裁决时，最终反倾销税只能从损害威胁或者严重阻碍的裁决作出的那天起计征。在临时措施适用期间支出的现金押金应予归还，担保应尽速解除。

"Yes, now you can give yourself airs," she said, you have got what you wanted.

"对了，您现在高兴了，"她说道，这是您所期待的。

Then the LORD said to me: Rebel Israel is inwardly more just than traitorous Judah.

上主于是对我说：＂失节的以色列比失信的犹大，更显得正义。