可收缩图

词组短语

contractible graph

与可收缩图相关的网络例句 [注：此内容来源于网络，仅供参考]

Together with some basic knowledge of Linear Algebra, we prove that there exists a polynomial time algorithm for finding the shortest contractible cycle in an locally LEW-embedded graph. 3. By some results of Minor Theorem, we prove the crossing numbers of some circular graphs C(10,4), C(9,3), C(8,3) on the projective plane.

利用C.Thomassen在大边宽嵌入方面的工作，得到了局部大边宽嵌入图的一些性质，再利用线性代数的知识，证明了在局部大边宽条件下存在多项式时间算法可以找到一个图的最短可收缩圈。

In first two chapters we study mainly some problems about the contractible edge of graphs.

本文的前两章主要研究的是关于图的可收缩边的问题。

objective trimetazidine has shown anti-ischemic properties to improve exercise tolerance without haemodynamic effects and direct cyto protective effect on the myocardium.however,it is not clear whether trimetazidine has beneficially effect on severe ischemic cardiomyopathy.methods 19patients（68±9）years with postnecrotic left ventricular dysfunction（ejection fraction31.7%±5.4%）were studied to examine the benefit of adding60mg a day of trimetazidine for3months to the classical therapy.the assessment included clinical evaluation,electrocardiography and echocardiography.results after adding60mg a day of trimetazidine for3months,attack of angina was relieved and dyspnea was improved（p.05）.but heart rate,systolic blood pressure,rate pressure product,ejection fraction,left ventricular volume and global wall motion index were not changed.conclusion trimetazidine seems to improve clinical status while can not change oxygen supply-to-demand ratio without adverse effects in patients on severe ischemic carˉdiomyopathy.

目的 曲美他嗪是一种新型的抗心肌缺血的药物，能够改善患者的运动耐量和心肌的直接保护作用同时并没有血流动力学效应。但目前对于严重缺血性心肌病患者的临床治疗价值还需要进一步观察。方法 19例（68±9）岁确诊为缺血性心肌病（左心室射血分数0%）的患者在常规治疗的基础上加用每日60mg曲美他嗪治疗3个月，随诊观察患者临床情况以及超声心动图指标的变化。结果 19例患者均可耐受在常规治疗基础上加用每日60mg曲美他嗪的治疗，随诊发现患者心绞痛发作明显减少，运动耐量明显改善。同时患者心率、收缩压、心率血压乘积、左心室射血分数、左心室容量以及整体室壁运动指数无明显改变。结论缺血性心肌病的患者在常规治疗基础上加用曲美他嗪是安全的，同时其能明显改善患者的临床状态，而这种作用并不改变心肌氧的供求比值。

Analysis of vertebroar terial blood flow has shown that in cases with pathological conditions the compl iance of the vertebral artery and peak systolic veolicity and capacity are signi ficantly decreased Conclusions:The Segmented K-space cin e phase-contrast MR is an important tool for non-invasive evaluation of vertebroarterial blood flow.

血流分析表明在病理情况下椎动脉的顺应性低于正常组，峰收缩期流速和平均流速明显降低，返流均百分比增加。结论：MR相位速度图对椎动脉的血流动力学研究具有重要意义，对椎动脉型颈椎病可提供可靠的诊断依据。

We also show that for a fixed surface S, if the face-width of an embedded graph 0 in S is large enough, then there exists a polynomially bounded algorithm to find a shortest contractible cycle in G.

从而在射影平面上解决了Mohar与Thomassen关于是否存在多项式算法寻找短圈的问题。对于一般曲面上嵌入图，只要它的面宽度充分大，那么同样有多项式算法发现最短可收缩圈。

与可收缩图相关的网络解释 [注：此内容来源于网络，仅供参考]

contractible graph：可缩图

contractibility 收缩性 | contractible graph 可缩图 | contractible topological space 可缩拓扑空间

contractible graph：可缩的图

contractibility | 收缩, 收缩性 | contractible graph | 可缩的图 | contractible space | 可缩(成一点)的空间

contractible graph：可简化图

简化记法 contracted notation | 可简化图 contractible graph | 收缩 contraction

contractible topological space：可缩拓扑空间

contractible graph 可缩图 | contractible topological space 可缩拓扑空间 | contracting function 收缩函数

crossbreeding：杂交

图1 不同小鼠品系间杂交(crossbreeding)可供研究基因(蛋白质)之间的相互作用以及心脏病的基因治疗. 例如在探讨基因治疗心力衰竭方面,品系间杂交方法可以研究一种提高心肌收缩性的基因干预能否纠正某一种基因干预所引起的心肌病和心力衰竭(略)3.1 动脉粥样硬化的机制和模型 动脉粥样硬化的病因涉及多种基因和环境因素,

fetal monitor：胎儿监护仪

胎儿监护仪(fetal monitor ) 根据超声多普勒原理和胎儿心动电流变化,以胎心率记录仪和子宫收缩记录仪为主要结构,可描绘胎心活动图型的测定仪. 有宫内监测(内监护)和腹壁监测(外监护)两种. 腹壁监测时产...

twitch：颤搐

(2)大力收缩15s 后,如波幅增高超过25%应高度怀疑本病,超过100%可确诊. 针极EMG 可见小的多相运动单位电位数目增加及波幅变异,单个肌肉诱发复合动作电位波幅明显降低,单纤维肌电图显示如MG 的颤搐(twitch)增加.

myoclonus：肌阵挛

[摘要]肌阵挛(myoclonus)为起源于神经系统的突发、短暂、闪电样不自主运动,肌阵挛性抽动在肌电图上可记录到10~50毫秒的运动单位放电,很少长于100毫秒. 正性肌阵挛是指某一块或一组肌肉的快速主动性的收缩,