割的

In this paper, firstly, not only the incidence matrix ,adjacent matrix, cycle matrix, cut-set matrix of an undirected graph are summarized, but also the close contact between a graph and its corresponding matrix are discussed ; secondly, many problems of a graph which are solved by analysing its matrix are listed as follows:1、The co-tree set of a graph is obtained by using its cycle-matrix ; 2、The branches of its spanning tree are given by using its cut-set matrix ; 3、By making use of the incidence matrix of a graph ,not only its vertex cut 、cut vertex 、isolated point and spanning tree can be obtained ,but also the two sides which are whether parallel or not can be judged ;4、By using their adjacent matrix ,the two graphes which are whether isomorphous or not can be judged; once more, there is a detailed introduction in view of special graph (for example: bigaritite graph ,regular graph and so on);last but not least, a graph method of calculating the N power of a matrix is given and the practical applications of the theorem for degree is indicated.

本文首先综述了无向图的关联矩阵，邻接矩阵，圈矩阵，割集矩阵以及图和它对应矩阵之间的关系；其次总结出了利用上述各类矩阵可以解决的图的若干问题：1、利用图的圈矩阵可以求其连枝集；2、利用图的割集矩阵可以求其生成树的树枝；3、利用图的关联矩阵不仅可以求其割点、点割集、连通度、孤立点和生成树，而且可以判断两条边是否平行；4、利用图的邻接矩阵可以判断两个图是否同构；再次，针对特殊图（例如：二分图、正则图等等）的邻接矩阵作了详细介绍；最后，得到了利用图计算矩阵的N次幂的方法，指出度数定理的实际应用。

Based on the cutting experiments used by cutter tooth and point-attack pick on the press and cutting simulation test table,the deformation and failure process of coal body are studied by the method of white light digital speckle correlation.

采用白光数字散斑相关测定方法，在压力机上，在截割模拟实验台上分别对煤试件进行刀齿、镐齿的截割实验，研究被截割煤体的变形破坏过程。

Li character cutting tool factory production operation big Li sign manual cutting tool: Cut the knife for scraping hides, PVC to shear the cloth knife, the even knife for scraping hides, to shear the knife for scraping hides, the scissors, the burr, the thimble, nail fur Qian, the nail skin to open, begins in 1995, obtained the customer high praise by the sharp durable cutting tool quality!

产品信息：裁皮刀；平皮刀；pvc布刀；割布刀；磨石；剪刀；钉皮钳；钉皮起；快刀；笨刀；五金；刀具；皮草刀具；皮匠刀；皮草加工用具；企业介绍：李字刀具厂生产经营大李牌手工刀具：裁皮刀、PVC割布刀、平皮刀（笨刀、割皮刀、织地毯刀、剪刀、磨石、顶针、扁嘴钳、起钉器，始于1995年，以锋利耐用的刀具质量得到了客户的好评！

So, if a man who is uncircumcised keeps the precepts of the law, will not his uncircumcision be regarded as circumcision?

所以那未受割礼的，若遵守律法的条例，他虽然未受割礼，岂不算是有割礼吗？

In combination with the internal attribution of coal-bed coal thickness, coal petrologic composition and ash content, etc.

提出了一套研究煤层割理及割理系统的方法，并完善了用割理评价渗透率的方法。

But, undercut technology may deteriorate the stresss concentration. In order to improve the situation, for a crank throw of a given ductile iron crankshaft, finite element analysis is conducted. The analysis result is optimized and related fatigue calculation is carried out. A compare between calculation and test results is performed and compared results show that conculation result is reliable. Therefore a good undercut structure is found and the reliability of crankshaft is improved.

球铁曲轴加沉割槽往往会加大曲轴的应力集中，根据某厂设计的球铁曲轴，本论文利用有限元分析的方法，对其单拐曲轴的沉割槽进行有限元模拟分析，在分析结果的基础上进行优化设计，最后得出较好的沉割槽结构，从而得到较好沉割结构，提高曲轴的可靠性。

The features and the performances of the longitudinal cutting head and the transverse cutting head of the heading machine are compared in view of the problems in use.

针对掘进机纵轴式截割头和横轴式截割头在使用中各自存在的问题，使用比较的方法对掘进机纵横两种截割头的特点和性能进行了分析比较，发现两种截割头在不同的工作情况中有各自的优缺点。

Mowing suppressed seedling emergence of tall-growing Stipa krylovii by affecting seed availability due to reproductive parts removal when mown in the previous year, whilst exerted a positive effect on low-growing Cleistogenes squarrossa probably as result of increased light availability and less competitive pressure from adult individuals, because mowing largely lowered the vegetation height and density. 3."U"shaped curve for seedling mortality across the entire growing season was thought to be associated with seasonal changes of air temperature but a small peak from mid-June to early July could probably be attributed to drought due to previous rainfall shortage.

自5月下旬至8月中旬，三种禾草的实生苗密度总体上都呈上升趋势，但刈割和放牧会使克氏针茅的实生苗密度受到抑制，表明前一年的刈割去除部分生殖器官影响形成实生苗的种子来源；刈割和放牧对生长较低矮的糙隐子草实生苗会产生正向效应，对低矮和稀疏植被进行有规律的刈割会增加植物群落内部的光照，减轻实生苗与成年母株的竞争。

To adopt band type rail rolled by stainless steel and chain type drive method run circumferential movement along with the pipe to be cut by flame cutting carriage,cutting torch will run radial movement driven by ball bearing screw by step motor along with the pipe to be cut,the above two dimension movement compose to inclined cutting movement of cutting torch,the inspection of circumference position of cutting torch,the determination of radial position and return point of cutting torch all controlled by SCM.

为了满足钢管斜截切割的要求，建立了钢管斜截切割的数学表达式，采用不锈钢轧制的带形轨道和链式传动的方式使火焰切割小车沿被切钢管做周向运动，割炬沿被切钢管的轴向运动由步进电动机带动滚珠丝杠完成，上述两维运动合成为割炬的斜切运动，割炬周向位置的检测、割炬轴向位置及折返点的确定均由单片机控制完成。

Suzhou, Taicang City Lvyin garden equipment sales of the business, professional sales garden machinery, garden tools, spray irrigation equipment, gardening materials, professional lawn grass seed company, jointly with international and domestic cooperation in a number of well-known companies, agents of their products:◎ Japan's Honda lawn machines, cut irrigation machinery, water pumps, a drug plane;◎ Japan Ochiai Hedgerow machine, cut irrigation machinery, tea machinery, etc.;◎ Japan Xin Edward Hedgerow machine, cut irrigation machinery, chain saw, and so on;◎ Danyang Vodafone Lawn Machines, wide-pruning;◎ Yangzhou Weibang lawn machines, grass-dredging, drilling machines, cutting-wide, rolling machines, shredders branches;◎ U.S.

苏州太仓市绿茵园林机械设备销售经营部，是专业销售园林机械、园林工具、喷灌设备、园艺资材、草坪草种的专业性公司，共同与国际、国内多家著名公司合作，代理其产品：◎日本本田草坪机、割灌机、水泵、打药机；◎日本落合绿篱机、割灌机、茶叶机械等；◎日本鑫德华绿篱机、割灌机、油锯等；◎丹阳沃得草坪机、宽幅修剪机；◎扬州维邦草坪机、疏草机、打孔机、宽幅修剪机、滚压机、树枝粉碎机

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。