对圆的

In the collembolan community, Sinella, Onychiurus, Isotomurus are the dominance species, the frequencies are 37.26%, 31.6%,and 21.23%, respectively.2.In the agricultural ecology of Fuyang, the dominant species are Collembola and Acari. Their frequencies are 66.37% and 16.72%, respectively. Liposcelididae, Ceratopogonidae, Chironomidae, Staphylinidae, Nematoda, Enchytraeidae are common species.

弹尾目昆虫对重金属污染的反应，不同的种之间有很大的差别，其中，裸长角属对Cu污染反应不灵敏，陷等属、棘属对Cu污染反应敏感，随着污染程度的加剧，它们的数量明显减少；小等属和长属对Cu、Zn、Cd、Pb等重金属元素的复合污染反应很敏感，而裔符属、球圆属、土属、圆属和鳞长属对重金属复合污染反应很迟钝，在这些重金属复合污染严重的农田中仍能很好地生存繁衍。

Okubo,the stress distribution in a circular disk maked of fiber-reinforced photoelastic composite under diametrical compression is investigated.

本文根据Okubo的各向异性分析，对纤维增强光弹性复合材料制成的对径受压圆盘进行了研究，在此基础上提出了采用一个对径受压圆盘测定光弹性复合材料三个条纹值f_L、f_T、f_

Because of this, circular runout will not detect changes in size.

圆跳动是对被测圆柱的任一截面圆独立检测，圆跳动检测不到尺寸的变化，被测圆柱的任何桶形，腰形或锥形都将被忽略

So, in this paper, a circular cavity witha large radius is used to replace the straight boundary of thehalf space, then the half space problem can be changed tothe scattering problem of two circular cavities to the steadyincident P-wave . Having the aid of the mature cylinderfunction theory, the general solutions of the wave functionscan be given, and an infinite linear algebraic equations ofthe unknown coefficients in the wave functions can be gottenwith the boundary conditions and the Fourier complex seriesexpansion technology, the infinite linear algebraic equationscan be approximately solved by the finite trunction withsatisfying some definite precision, at the basis of thissolution of the equation, the variations and the lay-outs ofthe DSCF at the circular cavity boundary vs. the differentincident angles, the different embedded depths of thecircular cavity as well as the different dimensionless wavenumber of the incident P-wave.

为此，本文采用一个半径很大的圆孔来代替半空间的直边界，将该半空间问题转化为一无限大空间中两个圆孔对稳态P波的共同散射问题，借助于成熟的柱函数理论，通过写出问题波函数的一般形式解，利用问题的边界条件，并采用复数傅立叶级数展开技术将其化为一个仅包含问题波函数中未知系数的一无穷线性代数方程组，在满足一定计算精度的前提下，通过有限项截断进行近似求解，进而讨论了圆孔边界处的动应力集中系数随不同入射角、不同的圆孔掩埋深度、入射波的不同无量纲波数以及介质的泊松比变化和分布情况。

This factory's main products cre:double-spoke hand mheels,five-pointed-star-shaped knobs,arrow-shped handles,Tshaped handies,ect.,more than thity series,over two hundred special rubbr pats,nylonplasdic parts,it is also possible for this facty to produce and make all kinds of non-atsndard operating parts and special-shapediai-shpepedsealing parts according to the requireements of the customers.

弓行拉手、内波纹手轮、背波纹手轮、圆轮缘手轮、双幅条手轮、双柄手轮、小波纹手轮、镀铬手轮、手柄球、长手柄套、转动手柄、可折手柄、可调位手柄、方形拉手、椭圆拉手、星形手柄、碟形手柄、三角箭形把手、椭圆手柄套、铣床手轮、GB4141.23波纹手轮、小手轮、平面手轮、带可折手柄满幅手轮、表盘满幅手轮、把手、十字把手、压花把手、通孔把手、定位把手、T形把手、直纹把手、捏手、三棱把手、偏转旋钮、手柄套、小转动手柄、锥柱手柄、球头手柄、单柄对重手柄、双柄对重手柄、外方卡盘扳手、摇手柄、手柄座、锁紧手柄座、圆盘手柄座、4501分度盘、4502大把手、586刻度盘、工作灯、手柄杆、压配式油标、旋入式六角圆形油标、长型油标、圆形长拉手、等三十多种系列，二百多种规格，满足不同用户的需要，生产制造各种机械封件，特种橡胶件，尼龙塑料件，也可根据用户需要，生产制造各种非标操作件，异形密封件。

At the same time, the electric potential and the electric intensity at the central axes and in the distance area of the charged ring are discussed.

本文中我们运用椭圆积分法计算出了均匀带电圆环空间电位和电场分布，使我们对其产生的电位和电场有一个全面了解。1均匀带电圆环的电位均匀带电q的圆环半径为b，以环心。

Through a series of experiments,the heat distortion curves of different position on such key parts of the grinder as feeding table,head box,grinding head are gained,and their influence factors are analyzed.

对深孔内圆磨削时磨削热对工件尺寸精度的影响进行了探讨，通过系列实验，获得了磨床进给滑板、床头箱、磨具等内圆磨床关键部件不同位置的热变形曲线，并对其影响因素进行了分析。

This model includes not only the effects on the dynamic capability of wood-working circular saw machine by the structure and installing position of each rotary components(such as saw,flange, fastening nut,principle axis,pulley,and so on)of wood-working circular saw machine,but also the effects by the structural parameter,working parameter,and the installing position of the bearing axletree.

本文通过对木工圆锯机结构、支承轴承特性及工作过程的分析，以国产MJ-90精密裁板锯转子系统(锯片、塔轮、锯轴、夹持装置和支承轴承)为研究对象，首次将木工圆锯机旋转构件作为转子系统，运用美国Rotating Machinery Analysis公司开发的大型转子系统动力学商业软件包XLROTOR，建立了木工圆锯机转子系统动力学模型。

In order to roll round billets with accurate roughing shapes by a three-high roughing mill and stabilize production, a flexible pass design method was used to optimize the traditional conjugate pass through the distortion design of the bottom, side wall and pressure difference of the pass, realizing the application of the conjugate round pass on the three-roll mill.

为轧制料形尺寸准确的圆料、稳定生产，采用变通孔型设计方法对共轭孔型进行优化设计，通过对共轭孔型槽底、侧壁、压力差的变形设计，实现了共轭圆孔型在三辊粗轧机上的应用，轧槽咬钢顺利，成品圆料容易控制，完全满足后续工序的要求，同时减小了轧线的轧制事故，单套轧辊的轧制量可提高60%以上，取得了良好的经济效益。

Sothe half space problems and the composite material problemwhich has an inside straight boundary will be changed to thescattering problems which involve two circular cavities、acircular cavity and a circular lining as well as a circularcavity and a circular elastic inclusion to the incident steadyplanar P-waves respectively.

具体做法是利用一个半径很大的圆孔和一个半径很大的圆形弹性夹杂来分别代替半空间的直边界和双质复合材料中的内部直边界，将原来的半空间问题和带内部直边界的复合材料问题各自转化成无限大空间中两个圆孔、一个圆孔和一个衬砌以及一个圆孔和一个圆形弹性夹杂对稳态P波的共同散射问题。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。