查询词典 retardation

Disease characteristics. Homocystinuria caused by cystathionine β-synthase deficiency is characterized by developmental delay/mental retardation, ectopia lentis and/or severe myopia, skeletal abnormalities (excessive height and length of the limbs) and thromboembolism.

疾病特征：由胱硫醚β-合酶缺乏引起的高胱氨酸尿症的病征是发育迟缓／智力障碍、晶状体异位和／或严重的近视骨骼异常和血栓栓塞。

Pachygyria is a neuronal migration disorder that develops during the 12th to 24th week of embryologic development, and results in various degrees of muscle spasm, hyperreflexia, seizures, developmental delay, and mental retardation.

巨脑回是一种神经移行障碍，发生于胚胎发育的12-24周，其导致不同程度的肌痉挛、反射亢进、癫痫发作、发育延迟和智力低下

Some investigations suggested that cyclins and CDK played an important role in the regulation of endomitosis of megakaryocyte. However, the mechanism of cyclins and CDK in the regulation of endomitosis of fetal megakaryocytes during ontogenesis and the relationship between cyclins/CDK and retardation of endomitosis of fetal mgakaryocyte is totally unknown.

一些研究发现周期蛋白和CDK在巨核细胞核内有丝分裂的调控上起重要作用，然而，周期蛋白和 CDK在胎儿巨核细胞核内有丝分裂调控上所起的作用，及其与胎儿巨核细胞核内复制延迟的关系目前全然不知。

Additional symptoms may include clouding of the corneas of the eyes, mild to moderate coarseness of facial features, mild mental retardation, easy fatigability, and/or heart disease.

其他症状可能包括角膜混浊的眼睛，轻，中度粗糙的面部特徵，轻度智力低下，易疲劳性，和/或心脏病。

Objective To evaluate the significance of epidermal growth factor in the development of fetal growth retardation.

目的 探讨表皮生长因子与胎儿宫内发育迟缓的关系。

It showed that this process was feasible for improving retardation of flaming and softness of wool.

实验的各项测试最终表明此工艺对提高羊毛的阻燃性和柔软性都有较好的效果。

That being added with anti-fog agents the electron conductivity of the emulsions increased brings to light, on the molecule level, that this kind of stabilizers has an retardation insulative effect on the combination of free electrons and interstitial silver ions.

加入防灰雾剂能使乳剂的电子电导率增大，从分子层面上揭示了这类稳定剂对自由电子与填隙银离子结合的阻滞作用。

When culture condition was changed abruptly from LES medium to RPMI-1640 medium, different reproductive mode including binary fission, ternary fission,multiple fission and gemmation were found after growth retardation of 24 ～ 72 hours. This phenomenon continued less than 24 hours and binary fission remained reproductive mode then.

当从LES培养基突然变为RPMI-1640培养基时，人芽囊原虫出现短时间(48～72h)内生长停滞，随后出现多种形式的繁殖方式，可见较多的二分裂、出芽生殖、三分裂、多分裂、裂体生殖，持续24h后恢复为二分裂为主。

We analyzed seven hundred cases of normal gravida on the fetus umbilical artery blood flow indexes and intrauterine growth retardation.

对700例正常孕妇的胎儿脐动脉血流指标的变化及其与胎儿宫内发育迟缓的相关性进行了分析。

In this thesis the process of constructing the non-perturbative Hamiltonian theory is de-scribed and is applied to estimate the vacuum condensate. It contains the following contents:At the very beginning, by using the path integral method and eliminating the gluon freedom, aGCM action 〓 of current quarks including lower order current-current coupling was derivedfrom the QCD Lagrangian and the effective Hamiltonian operator that could hardly be doneby the normal methods was derived. After doing this, the broken vacuum is introduced whichincludes quark-antiquark condensate through the generalized Bogoliubov-Valatin transformation,the effective Hamiltonian of constituent quark was derived. The detailed formulas containingthe spatial current-current coupling term for the effective Hamiltonian and gap equations wasworked out by parameterizing the correlation kernel as a quadratic potential. And then, the gapequation was solved and the quark-antiquark condensate of vacuum was studied both in the casesof instantaneous interaction and retarded interaction. In the end, the effective Hamiltionian withtwo-body quark-quark interaction was derived with one-body approximation, and with the helpof the functional integral method the coupling non-linear dynamic equations for systems withnuclear matter was derived. Finally, these equations were solved by selfconsistent method andthe effect of nuclear matter on vacuum condensate was studied. The spatial current-current coupling term is too difficult to handle, hence the correlationkernel is assumed to be not important and usually omitted in the pure vacuum condensate, andthe instantaneous interaction generally is adopted. Retaining the spatial current-current termand partial retardation effect, the quark pairs condensate in pure vacuum was studied, and theeffect of quark mass was also studied. At present, little study is focused in the case with nuclearmatter and spatial current-current term also omitted. Under the approximation with partialspatial current-current term, the effect of nuclear matter on vacuum condensate was studied.

本论文描述了量子色动力学整体色对称模型哈密顿量方法的构建过程，得到了反映正反夸克对凝聚真空结构的关于组分夸克的有效哈密顿量算符，它隐含了胶子作用，并且准确至流-流耦合项；接着，通过参数化哈密顿量中的夸克作用关联核，导出平方禁闭势参数化选择的哈密顿量的具体公式和能隙方程；随后，应用公式，编程求解，考察了瞬时作用下和部分延迟作用下真空的正反夸克对凝聚，在计算中保留了空间流-流耦合作用；之后，导出瞬时势和延迟势下包含二体作用项的哈密顿量公式，并采用单体化近似，通过泛函变分方法得到核物质存在时耦合的非线性动力学方程；在保留部分空间双流耦合作用的近似下，求解核物质的动力学方程，考察核物质密度对真空凝聚的影响，以往考察真空凝聚，对关联核的选用，由于空间流-流耦合项不易处理，也认为作用不大，常忽略该项，并且常采用瞬时作用；本文保留空间双流项和部分延迟作用，考察了真空情形的夸克对凝聚，还考察了夸克质量对纯真空凝聚的影响，以往对核物质存在情形的真空凝聚考察很少，也都忽略空间流-流项，本文在考虑部分空间流-流项近似下，考察了核物质存在对真空凝聚的影响。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。