不能分析的

A new mathematical model is put forward numerically to simulate the wheel ovalization.. In the numerical simulation, the dynamic model of a half railway vehicle coupled with a tangent track is employed. Using the new numerical method investigates vehicle-track coupling system dynamic responses including lateral and vertical displacement of wheelsets and the vehicle, lateral and vertical vibration acceleration of the track at different phase angle of the two side wheels of the same wheelset, which are compared with that of the traditional model. The numerical results show that the discipline and frequency of dynamic responses are accordant, amplitude and phase of lateral dynamic responses are different. It is concluded the traditional track geometric irregularity excitation model does not simulate the effect of periodic wheels ovalization on vehicle-track coupling system dynamic behavior truly, the new model is more accurate and reasonable.

本文研究了车轮二阶周期性非圆化—椭圆化，建立了一个新的模拟车轮椭圆化的数学模型，结合车辆－轨道空间耦合动力学模型，计算了同一轮对左右车轮不同相位和车轮椭圆度下轮对和车体的横、垂向位移，钢轨横、垂向振动加速度，并与传统模型计算结果作了对比，分析表明两种模型的动力响应变化规律和频率一致，但横向动力响应幅值和相位均存在不同程度不可忽略的差异，因此传统的轨道几何不平顺激励模型不能真实模拟车轮的周期性椭圆化对车辆－轨道耦合动态行为的影响，而本文模型更能反映实际椭圆车轮与钢轨接触情形，计算方法准确而合理。

Through 2D axial symmetrical and 3D scarfed reversal nozzle calculating, the main flowfield characters were given, and compared with the experiment data for validation. Then, the program was given, which can well predict the performance of the scarfed reversal nozzle. In this paper, the flowfields of open cavities with different structures and different parameters were calculated. Some new, full and more reasonable mechanism interprets were given. We think that the essential cause of pressure oscillatory is coherent effect of wave, eddy and cavity structure, but the procedure is different with different cavity structure, it can not use single procedure to described.

通过对二维轴对称和三维斜切反喷管的计算分析，本文给出了流场的主要特征，并采用实验数据进行了验证，形成了分析斜切反喷管可靠的应用方法；本文通过对不同结构形式、不同参数的二维、三维非定常超声速开式空腔流动进行的计算分析，提出了较为全面、合理的空腔压力振荡循环机理的解释，本文认为压力脉动本质上是波、涡以及结构之间相互的干扰和耦合，但干扰的具体过程随空腔结构的不同差别较大，不能采用单一的规律进行描述。

Driven by the analyzing the synonymic characteristic of the key words and the intensity of semantic association among the ontology instances, we provide a user"s intention analysis scheme, which synthesizes the synonymic relation and the semantic association. The method can improve the accuracy and completeness of the mapping from key word to ontology entities, infer the user"s intent.

本文以查询关键字词义特性和本体实例之间语义关联强弱分析为切入点，提出了一种综合词义关系和语义关联分析的查询目标分析方法，提高了查询关键字到本体概念映射的完整性和准确性，帮助搜索引擎有效的确定用户的查询目标，解决了传统搜索引擎不能很好理解用户意图的问题。

Based on a lot of experiments, it shows the distinct error between classical theory curve which express the relation of cell diameter, cell density and foam tensile strength , tensibility tensile product and re-spring degree and experiment curve. It also can＇t explain the relation of hole degree , area of cell wall with above four mechanics parameter. But the sub-cluster scale theory was demonstrated successfully to explain the relation of cell structure and foam mechanics property on different mold temperature, mold pressure, mold period and different chemical blowing agent, blowing activator content.

通过大量的实验结果理论分析表明：以往的经典理论存在着很多不足之处，它不能有效地解释孔径、泡孔密度与抗拉强度、断裂伸长率、断裂功、及回弹率之间的理论曲线与实验曲线之间的偏差，也不能解释空隙度、泡孔壁厚与上面四者之间的关系，而群子标度理论则成功地论证了在不同模压温度、模压压力、模压时间及不同用量发泡剂、发泡促进剂条件下泡体力学性能与结构之间的相关性。

S scheme which is a combination of Mambo et al.\'s proxy signature scheme and Zheng\'s signcryption scheme. Our analysis demonstrates that their scheme cannot guarantee strong unforgeability, strong identifiability, non-repudiation, and prevention of misuse.

他们的体制本质上是Mambo等人的代理签名体制和Zheng的签密体制的结合，安全性分析表明他们的体制不能满足强不可伪造性、强可识别性、不可抵赖性，也不能防止滥用。

By employing normal probability plot,R/S analysisand autocorrelation function analysis,we find,with the high frequency data,the return of domestic financial market described by Shanghai index andShenzhen composite index presents the stylized facts,such as fat-tailed distribution,clustering and dependence,which infer that our market can not be regarded as efficientmarket.

利用正态概率作图、R/S分析和自相关函数分析等方法，我们发现在高频数据下（时间长度为15分钟），以上证指数和深成指数为代表的我国金融市场呈现出收益率的&肥尾&、&集聚&和相关性等格式化特征，这说明我国金融市场不能被看成是有效市场。

But at present the on-line monitoring technology was concentrated on AC cable, the relevant research on DC feeder cable was scarcely carried out around the world, and the on-line monitoring technology on AC cable can not be adopted. Then, in the thesis, the faults reasons were analyzed and fault models with real project were set up started with the faults of the DC feeder cable.

由于直流馈出电缆在线监测技术国内外未见报道以及交流电缆在线监测技术不能移植于直流馈出电缆在线监测的现状，论文首先从直流馈出电缆故障分析入手，分析了直流馈出电缆故障原因，建立了具有工程意义的直流馈出电缆故障模型。

The new watershed-based method which improves on the original watershed transform to some extent,can overcome the shortcoming of some conventional methods that they cannot mark the grain exactly and give a exact boundary or mark to every grain in the image.

在对颗粒分析方法进行归类和总结的基础上，提出了一种基于分水岭的彩色图像颗粒分析普遍框架，该框架不仅消除了有些传统方法不能进行颗粒定位的缺点，而且对分水岭算法进行了一定的改进，由于该算法对颗粒形状进行了精确定位，从而得到颗粒的各种特征信息，可比较好地完成了颗粒分析。

Fortunately the system upgrade and business process re-engine bring us opportunity to improve performance analysis and achieve leaning management.

当公司经营规模一再扩大，这种粗放式的分析无法快速明确找到答案，已经不能满足经营分析并为管理层提供决策依据的要求。

The non-integrated analysis method for shock resistance does not take the coupling effects between the equipment and ship hull into account and cannot reproduce the real shock environments of shipboard equipments precisely.

研究结果表明，非一体化抗冲击分析方法割裂了设备与船体结构之间的耦合效应，不能精确再现船用设备实船冲击环境，中远场水下爆炸时非一体化抗冲击分析得到的设备响应结果偏大，中近场时结果偏小。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失