查询词典 mean curvature

The estimation of forming part"s sideline The estimation of forming part"s sideline is significant in weld and assembly process, the paper puts forth two kinds of method to realize quantitative analysis for the deformed sideline, one is using line contour error to estimate deformed sideline combined with GA and taking the value of line contour error as target to check whether it is in the range of precision; The other is comparing curvature and torsion of design model with curvature and torsion of deformed model to check the sidelines precision.

冲压件边线变形的评价。冲压件的边线变形的评价在焊装工艺中有着重要意义，本文提出两种方法来实现冲压件边线的变形评价：一是借鉴线轮廓度评定的方法，结合遗传算法计算出边线的线轮廓度，并以线轮廓度值作为边线是否满足要求的评价指标：二是通过比较变形前后曲线的曲率和挠率来评价边线的变形情况。

There were six themes in this study. First of all, the geometry of in-vivo human pinna and ear canal was measured non-invasively. The 3D model of pinna and ear canal was reconstructed and then measured based on the image processed by HRCT. Second, the 2D curvature of in-vivo human ear canal was measured non-invasively. The angles and curvatures of superior and inferior walls of first and second bends were measured. The 2D curvature of ear canal was computed by sine and cosine laws. Third, the in-vivo human ear canal was reconstructed by RE. The distribution of sound field was analyzed by FEM. The data obtained in this study can be the reference for clinicians and audiologists. Fourth, the 3D model of earmold of hearing aids, including the ear shell and the housing, was reconstructed by RE based on the image of in-vivo human ear canal obtained by CT.

本研究主题其四，对於听力受损之患者往往皆须选配助听器帮助其放大声音，其中耳模是助听器的外壳，也是接触到耳朵的仪器，而耳道型助听器系位於耳甲艇及耳甲腔延伸至耳道第一弯道处，在制作耳模必须利用灌模方式来取得紧配之耳模，其中耳模在助听器的使用过程中，常因耳模松脱，无法与人耳道紧密配合而造成漏音，因此，利用活体人外耳道电脑断层影像，重建耳道型助听器耳模之三维立体模型影像，其中耳模包括了耳壳及耳模内部空间，并进行几何外型量测，探讨耳道型助听器之体容积大小，也提供了制作耳模时快速、精确度高、减少翻模及修模次数，可减少误差率之方法。

Derived flexibility curvature formula of two-dimensional structure, and the damage index of plate based on these formula, namely flexibility curvature matrix.

之后定义了等效柔度曲率变化率，给出了ECR-SD曲线并通过仿真模拟，回归了板结构的损伤程度的判别公式。

In the case of loadingalong curved strain path,the author discovered that the instability mentioned aboveoccured only if the curvature changed from large to small.The drop and recovery instress obviously depend on the curvature and its rate.

对曲线应变路径的情形，本文发现只有在曲率由大向小变化时才出现上述瞬时软化响应，且曲率改变变化趋势时曲率的大小及路径弧长对应力大小的降低和重新强化的程度及变化率的影响较为明显。

Result The skewed parabolic profile is observed in CCA under 1:60 curvature and physiological average Reynolds number. As curvature and Reynolds number increase, the middle of horizontal profile appears sunken and the vertical profile is M-shaped. There are different profile shapes in different localities along the curved pipe.

结果 当颈总动脉的曲率等于1：60 时，在人生理平均流动雷诺数条件下，颈总动脉的速度剖面可用偏斜的抛物面来近似；当颈总动脉曲率增大或流动雷诺数增大时，弯曲平面上的速度剖面中部出现下凹趋势，垂直方向上出现M型速度剖面；沿管轴不同位置上的速度剖面形状不同。

A magnetic source and condenser for protecting a pipe, ionizing any fluid flowing therein, and ionizing any dissolved and suspended solids in such fluid, comprising:a magnetic source including a magnet having a pair of opposed planar major faces and a planar minor face extending between said major faces and perpendicular to said major faces,said magnet being charged so that one of said major faces is a south pole and the other of said major faces is a north pole,a magnetic condenser a pair of pole pieces, each of said pole pieces having a pair of opposed planar major faces, one of which is an inner major face and the other of which is an outer major face, the area of said inner major faces being equal to that of the major faces of said magnet, the area of said outer major face being larger than each of said major faces of said magnet,said pole pieces being positioned on opposite sides of said magnet such that said pole pieces sandwich said magnet, said inner major face of each pole piece is contiguous with and completely covers an entire major face of said magnet, and said outer major face of each pole piece faces away from said magnet,each pole piece having an integral foot extending perpendicularly to said inner major face of each pole piece such that said pole pieces have two respective integral feet which extend toward each other and are substantially coplanar, each foot having a distal and a proximal surface with respect to said magnet, each foot having an end which is spaced from the end of the opposite foot,said distal surface of each foot having a predetermined concave curvature which will conformingly mate with an outside surface of a pipe having a predetermined convex curvature,said proximal surface of each foot being contiguous with said minor face of said magnet

我要求： 1。一台磁性来源和冷凝器为保护管子，电离任何流体流动在其中，和电离任何被溶化的和暂停的固体在这样的流体里，包括：一个磁性来源包括磁铁有一对被反对的平面主要面孔和一张平面较小面孔延伸在前述主要面孔和垂线之间对前述主要面孔，前述磁铁被充电以便前述主要面孔的当中一个是南极并且其他前述主要面孔是北极，一台磁性冷凝器每对杆片断，每个前述杆片断有一对被反对的平面主要面孔，其中之一比每个是是一张外面主要面孔的一张内在主要面孔和其他，前述内在主要面孔区域是相等的与那前述磁铁，前述外面主要面孔区域的主要面孔大的前述磁铁的前述主要面孔，前述杆片断被安置在前述磁铁的反面这样，前述杆片断三明治认为磁铁，各个杆片断的前述内在主要面孔是接触的与和完全地包括前述磁铁的一张整个主要面孔，和各个杆片断面孔的前述外面主要面孔从前述磁铁，各个杆片断有一只缺一不可的脚垂直地延伸对各个杆片断的前述内在主要面孔这样，前述杆片断有延伸往彼此和极大地coplanar 的二各自缺一不可的英尺，各只脚有末端和接近表面谈到前述磁铁，各只脚有被间隔从相反脚的末端的末端，各只脚前述末端表面有与管子一个外表面conformingly 将联接有被预先决定的凸面曲度的被预先决定的凹面曲度，各只脚前述接近表面是接触的与前述磁铁的前述较小面孔

By parameter(tower total height, shell thickness, meridional curvature) analysis of cooling-tower natural frequency, we find that, the basic natural frequency of cooling tower is sensitive to the top meridional curvature, an approximate formula is proposed based on the parameters, which can estimate the basic natural frequency of cooling tower.

通过对冷却塔自振频率的参数分析，如塔体整高、塔壳厚度、子午线曲率等，发现基础频率对上部子午线曲率较为敏感，并给出了用于估算大型双曲冷却塔基础频率的三参数公式。

Posterior curvature - The posterior shape of the dental arch has been described in the literature as a straight line (the Bonwill-Hawley arch form) and a rather dramatic curvature.

后曲率-在后形状牙弓已在文献中描述的一条直线（在Bonwill一霍利拱形式）和一个相当戏剧性的曲率

So, are you saying that in the case of positive curvature the space has less volume within a given distance, and in the case of negative curvature more volume?

&所以，你是说如果宇宙有正曲率的话，它在一个限定的距离之内有着较小的体积，如果是负曲率的话，就有更大的体积？&

A novel algorithm for detecting corners is presented based on Curvature Scale Space and Multi-scale Curvature Product.

在曲率尺度空间和多尺度曲率积的基础上，提出了一种基于多尺度曲率多项式的角点检测算法。

The United Kingdom has pledged to provide technical assistance to the peacekeeping effort in Darfur, including airlifting supplies and equipment to assist the African peacekeepers.

英国承诺为达佛的維和努力提供技术帮助，包括提供非洲的維和部队空运补給和裝备。

Results: The level of ET-1mRNA in placental villus was significantly higher in pre-eclamptic women than that in control group.

结果：妊高征组患者胎盘绒毛组织ET-1 mRNA的表达较正常妊娠组明显增高。