查询词典 singularity

At the same time, combining with the actual condition of delivery pipeline of our country and some prevalent leak detection and location methods, this paper raised a method, which is based on wavelet analysis and negative- pressure-wave to detect and locate the leakage. Jobs in the paper are as follows:As affected by gas density, pressure, specific heat and pipe material, the velocity of negative-pressure-wave improved depending on the energy conservation. At one time, taking the affection of velocity of gas flow, the location formula was modified in some degree.When locating the leaks with location formula, the iterative approach algorithm was adopted as a new method to increase the location accuracy level of system.Multi-scale decomposition and reconstruction of wavelet transform is utilized to filter the noise of negative-pressure-wave, which was brought by leakage. With the capacity to detect the signal singularity fast and accurately, wavelet transform was used to catch the break point of pressure signal. The work improved the accuracy of At in location formula, accordingly improved the location accuracy.Wavelet is a suitable tool for signal analysis. The distinct character is that the mother-wavelet is of optional. That means choosing different mother-wavelet will get different analysis result. So we studied how to choose mother-wavelet and its scale for signal singularity detection. The method is to choose a wavelet by regularities of the wavelet and the signal.Finally, a plan, which bases on SCADA system for inspection and detection of natural gas leakage, is proposed in the article.

其中，主要进行了以下几方面的工作：针对泄漏产生的负压波在管道中的传播速度受媒介的密度、压力、比热及材质等因素的影响，而非声波在空气中传播的速度，本文利用能量守恒原理，对其进行了修正；考虑到管内气体流速对压力波速的影响，对原始的负压波定位公式进行了一定程度的改进，并在利用定位公式进行泄漏点定位时采用逐步迭代逼近算法，提高了系统的定位精度；利用小波变换的多分辨率分解和重构技术，对采集到的管道发生泄漏时产生的负压波信号进行了降噪处理；并利用小波变换技术对信号奇异点的快速、准确的识别能力，对经上述消噪后的负压波信号进行了奇异点捕捉，精确捕捉的结果提高了定位公式中上下游站点采集到的负压波奇异点的时间差△t的精度，从而进一步提高了定位的精度；考虑到小波变换是一种基波可变的信号分析工具，也就是说，不同的小波基波对信号分析的结果将有很大差别，这势必影响最终的处理结果，因此，我们又对比分析了本课题中小波基及尺度的选择问题，依据规则性系数相似性原理对母小波的选择进行了探索性研究；最后，还提出了基于SCADA的泄漏检测与定位系统的软件开发构想及系统的嵌入方案。

Detection on signal singularity point is also discussed in this thesis. Lift Wavelet this text also discussed lifting wavelet usage in other fields, such as: Detection on signal singularity point, Image fusion. Experiment enunciation, Lifting wavelet to all has a good performance in these aspects.

另外本文还用提升小波实现了变换信号奇异点的检测以及基于加权融合策略的图像融合；实验表明，提升小波在图像处理的其他方面也有很好的处理效果。

Plane strain, mode I quasi-static steady state crack growth is investigated utilizing the finite element method. It is once again established that TNT plasticity can significantly increase the stress level near the crack tip. The crack tip stress singularity is higher than or equal to the square-root singularity of elastic K field and is also independent of the plastic hardening exponent.

采用有限元方法研究了平面应变Ⅰ型准静态的稳态裂纹扩展，再次证实TNT非局部理论能够显著提高裂纹尖端附近的应力水平；裂尖应力场的奇异性超过或等于弹性K场平方根奇异性，而且与塑性硬化指数无关。

One method is the singularity transferring method for calculating integral value containing O(1/R) singularity in its integrand［1］.The other singularity is removed first and the integral contribution of this small area is proved to be zero.

另一种方法是为解决O(1/R2)高阶奇异积分的数值计算问题的，它是通过排除一包含奇点的有限小块，而这一小块区域对积分的贡献为零，从而使积分方程在整个积分域变得数值可积。

Microsoft did not openly "Singularity" more detailed information, but as a part of this project -"Midori" operating system, and perhaps reveal some details.

微软并没有公开"Singularity"更多的详细信息，但作为这个项目中的一部分-"Midori"操作系统，也许透露了一些细节。

In development of these programs under cylindrical coordinates, the singularity at the pole and transfer phenomenon across the pole were studied deeply and a numerical method which has made these programs efficient in 3D function was advanced and employed to eliminate the singularity by setting up a special mesh at the pole on the polar plane.

针对炼钢生产钢包吹气搅拌精炼工艺，本论文从开发数值仿真程序入手，分别对吹气搅拌条件下钢包金属熔池体系的流体流动、传热和传质、夹杂物碰撞长大和排除等传输现象进行了数学模型或物理模型研究。

Where, in the International Phase, when the international retrieval entity or international preliminary examination entity considers the international application is not in conformity with the requirement of singularity provided in the Patent Cooperation Treaty, the applicant does not pay the additional fee as provided, thus causing some parts of the international application to not undergo international retrieval or international preliminary examination, or when entering the National Phase in China, the applicant requires the above-mentioned parts to be regarded as the basis of examination, and the administrative department for patent under the State Council considers the singularity of the invention has been well-judged by the international retrieval entity or the international preliminary examination entity, it shall notify the applicant to pay the fee for recovering singularity within a specified time limit.

在国际阶段，国际检索单位或者国际初步审查单位认为国际申请不符合专利合作条约规定的单一性要求时，申请人未按照规定缴纳附加费，导致国际申请某些部分未经国际检索或者未经国际初步审查，在进入中国国家阶段时，申请人要求将所述部分作为审查基础，国务院专利行政部门认为国际检索单位或者国际初步审查单位对发明单一性的判断正确的，应当通知申请人在指定期限内缴纳单一性恢复费。

Where, in the International Phase, when the international retri entity or international preliminary examination entity considers the international application is not in conformity with the requirement of singularity provided in the Patent Cooperation Treaty, the applicant does not pay the additional fee as provided, thus causing some parts of the international application to not undergo international retri or international preliminary examination, or when entering the National Phase in China, the applicant requires the above-mentioned parts to be regarded as the basis of examination, and the administrative department for patent under the State Council considers the singularity of the invention has been well-judged by the international retri entity or the international preliminary examination entity, it shall notify the applicant to pay the fee for recovering singularity within a specified time limit.

在国际阶段，国际检索单位或者国际初步审查单位认为国际申请不符合专利合作条约规定的单一性要求时，申请人未按照规定缴纳附加费，导致国际申请某些部分未经国际检索或者未经国际初步审查，在进入中国国家阶段时，申请人要求将所述部分作为审查基础，国务院专利行政部门认为国际检索单位或者国际初步审查单位对发明单一性的判断正确的，应当通知申请人在指定期限内缴纳单一性恢复费。

A method based on linear singularity analysis of image is presented. The improved method, called Directional Beamlet Transform is better than traditional Beamlet transform about directional information of image and has the ability of representing linear-singularity of image. According to the analysis of linear singularity, edge detection is transferred to detecting singularity point in the coefficient matrix of DBT.

针对基于图像像素点分析的边缘提取方法存在无法同时满足高抑噪性、连续性、定位性等问题，本文提出了方向Beamle 变换方法，在定义图像线奇异性的理论基础上，利用DBT 对图像进行线奇异性分析，依据Beamlet 变换具有的线段提取能力，将图像边缘检测问题转化为方向Beamlet 变换系数矩阵中奇异点的检测问题，以降低噪声点对边缘检测结果的影响。

By analyzing the structure singularity and configuration singularity with the screw theory and the line geometry method, the fundamental conditions of generating the motion singularity are obtained.

本文采用螺旋理论和线几何方法对结构奇异以及配置奇异进行分析，从而得到运动奇异位形产生所满足的条件，并给出3-PRPS并联机器人奇异位形图解说明了该方法的可行性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。