查询词典 difficult point

In addition, total wheel/rail contact calculation with divided rail outline method are raised. Under the condition of considering the displacement, bouncing, yaw, roll of wheelsets and displacement, bouncing, roll of rails, minimum gap between rail and wheel were calculated by the trochoid method and divided rail outline method, we can easily judge totally real contact states of the wheel/rail such as normal one-point contact, nonnormal one-point contact, two-point contact and wheel complete lift. Wheel/rail normal forces in the two contact point are respectively calculated by nonlinear Hertz contact theory, and then, result of simulation more close to reality on actual track.

另外，提出了轨廓分区法全面计算轮轨接触状态法，在考虑轮对的横移、浮沉、摇头、侧滚和左右钢轨的横移、浮沉、侧滚的条件下，可全面地分别计算左右侧轨顶和轨侧区域与车轮的最小轮轨间隙量，以此来判断轮轨的真实接触状态：正常的一点接触、非正常的一点接触、两点接触和车轮完全悬浮，并根据非线性赫兹接触理论分别求得两接触点处的轮轨法向力，从而使仿真结果更接近于车辆在实际线路上的运行状态。

The logical starting point, with the characteristics of the pilot, is the basis of promoting the subject research to further develop and mature. The logical starting point, also with the characteristics of the ultimacy, means that it is not only the most basic scope of audit theory, but also the starting point and the end point of audit theory systems.

逻辑起点具有先导性，是推动学科研究进一步发展成熟的基础；逻辑起点还同时具有终极性，这既意味着它是审计理论中最为基本的范畴，同时也是审计理论体系的出发点和目的。

The results of the rule of law with ordinary methylation by formaldehyde Veratryl three groups the average weight of 2.5609g, the average yield was 91.31%, the melting point of the three groups were 42.4 ~ 44.8 ℃, 41.5 ~ 45.2 ℃, 41.7 ~ 44.3 ℃, from the results of we can see that the three groups of the melt from the melting point greater than that which the product of the by-product of the detection of the melting point have a certain impact; and the legal system with microwave radiation by an average of Veratrum aldehyde quality 1.4016g, the average yield was 93.23 %, melting point of the three groups were 41.8 ~ 43.2 ℃, 41.3 ~ 42.6 ℃, 41.6 ~ 43.5 ℃, melting away from the three groups as compared with ordinary methods of measuring the melt-out from the small.

结果 用普通甲基化法制出来的三组藜芦醛平均质量为2.5609g，平均产率为91.31％，三组的熔点分别为42.4～44.8℃，41.5～45.2℃，41.7～44.3℃，从结果可以看出，三组熔点的熔距都比较大，证明产物当中的副产物对熔点的检测有一定的影响；而用微波辐射法制出来的藜芦醛平均质量为1.4016g，平均产率为93.23％，三组熔点分别为41.8～43.2℃，41.3～42.6℃，41.6～43.5℃，三组熔距较普通方法测出来的熔距小。

Methods A retrospective analysis of paranasal coronal computedtomography scans of 200 sides from 100 patients were performed. The junction point between vertical line of orbital plate and anterior cranial fossa, the angle from the line between the above point and attachment point of cribriform plate to horizontal line, the distance from vertical line of orbital plate to attachment point of cribriform plate, were measure respectively.

回顾性分析100例患者200侧的鼻窦CT，在冠状位上测量眶板垂直切线与前颅底交点，此点与中鼻甲骨质筛板附着点的连线与水平线的夹角、眶板垂直切线与中鼻甲骨质筛板附着点之间的水平距离。

There are six forming methods throughcombining three different types of elements, among them, thereare four forming methods which have emblematize andpracticability: multi-point die forming、half multi-point die forming、multi-point alternating forming、half multi-point alternating forming.

对有限元模型建立及数值模拟关键算法和参数的研究在进行薄板类件多点成形的有限元分析中，涉及两类边界条件，一类是载荷，另一类是运动约束。

Results:(1) the mark of glabellar point, subnasal point,stomoschisis point, and supramentale fit the conception of "the golden point".

结果：新疆维吾尔族美貌女性面部、五官比例的特点：（1）眉间点、鼻下点、口点、颏上点4个界点中除颏上点以外，其余界点与&黄金点&基本相符。

Chinese aesthetic categories have their unique characteristics: from the point view of semiotic forms, they are imagerial; from the view point of logic, they are integrative; from the view point of dynamic evolution, they are derivative; and from the view point of theoretical aim, they are functional.

中国古代文论和美学研究经过近一个世纪的发展，目前范畴和范畴体系受到高度重视，被看作是&探索传统文学理论批评内在规律和本质特征的一个重要切入点&，甚至已成为学术界的一个&热点&[1 ] 。但在范畴研究中，历史梳理和各别研究相对容易一些，体系建构和综合研究则十分困难，因而后一方面的成果就比较缺乏。

Shenzhen Property Management Throughout 20 years of development, there are three important turning point: from the first property management company, to property management to millions of households for the first turning point; to Shenzhen Lotus Futamura began implementing the "integrated" management as a symbol of the establishment of the Shenzhen property management mode for the second turning point; Louden Village Property Management open tender competition kicked off the market is the third turning point.

符合当地的条件，以建立一个新的模式，物业管理深圳物业管理在整个20多年的发展，有三个重要的转折点：从第一物业管理公司，物业管理数以百万计的家庭第一次转折点；到深圳莲花二村开始实施&一体化&管理作为一种象征，建立了深圳市物业管理模式的第二转折点；鹿丹村物业管理公开招标竞争的市场启动的第三个转折点。

The extreme value of binary function at f_f_-f~2_=0 is judged by its direction derivative which follows ray starting from stable point and passing point P at every point P in noncentral neighborhood of stable point .

用驻点的去心邻域内各点P处函数沿以驻点为端点的过点P的射线方向的方向导数是否同号，来判定二元函数f在fxxfyy-f2xy=0时的极限。

Each group 30cases. The patients in the two groupsall were treated by Oral use of persantine, vitaminE, shenyankang. And lowfrequency direct current electroacupuncture at renal regions acupoints[Sanjiaoshu point (BL22), shenshu point (BL23), pishu point (BL20), qihaishupoint (BL24), zhishi point(BL52)]were added to the treatment group.

治疗组在对照组治疗基础上加用低频直流电针肾区穴位(三焦俞、肾俞、脾俞、气海俞、志室穴)，对照组运用潘生丁、维生素E、肾炎康复片治疗；疗程均为20天。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。