查询词典 algebraic closure operator

By using properties of scalar matrices over semirings,we generalize algebraic properties for the automorphisms of matrix algebras over commutative rings and obtain some algebraic properties for the automorphisms of matrix algebras over commutative semirings.

在这一章中，我们首先利用半环上常量矩阵的性质把环上矩阵代数的性质拓广到半环上，获得了交换半环上矩阵代数自同构的一些代数性质，接下来采用积和式的方法证明任意非负交换半环上n阶矩阵代数Tn的自同构的n次幂必为内自同构。

Experiments of flow conductivity closure stress of typical propping agent are done, propping agent short-term flow conductivity alteration index is defined, by this, the relation between fissure short-term flow conductivity and closure stress, it is close to exponential relation. 4. Establishing the mathematical simulator of hydraulic fractured well's production in a steady state, finding the relation curve between dimensionless flow conductivity and fracture penetration coefficient by means of calculation and analyses, it is the basis of hydraulic fracture. 5. Expatiating the importance of optimized hydraulic fracturing design in reservoir engineering, advancing the optimizing design method, fracture dimension can be calculated easily when the physical parameters are known. 6. Production rate decline standard curve of vertical fractured wells is achieved by mathematical simulation, when the flow pressure is certain , by asymptotic analyze, this decline curve is close to exponential relation.

完成了国内外典型支撑剂的导流能力闭合应力影响实验，在数据分析中定义了支撑剂短期导流能力变异系数，并由此发现裂缝短期导流能力随闭合应力变化的近似符合指数关系式； 4 建立了一种水力压裂井稳态产能的数学模拟器，计算分析找到了最优无量纲导流能力与裂缝穿透比之间的新型关系曲线，它是水力压裂优化设计的基础； 5 阐述了水力压裂油藏工程优化设计的重要性，提出了优化设计方法，在已知支撑剂物性参数条件下可简洁计算最优裂缝尺寸； 6 数学模拟给出了垂直裂缝井产量递减标准曲线，在井底定压条件下通过渐近分析表明，该递减曲线满足指数关系式。

This thesis combined the riverbed section and plane form, from the two side of hydraulic computation and model test, put forward the method to realized the automatic computation for river closure gap hydraulic parameters and comparison and verification. And through carrying on the secondary development to AutoCAD, realized the common software of automation drawing the topographical section of model test. Based on hydraulics computation technology, finished developing the common application software for one berm-dam vertical closure hydraulic computation.

本文结合河床断面与平面形状，从水力计算与模型试验两个角度出发，提出了实现龙口水力参数计算自动化并进行验证比较的方法；并且通过对AutoCAD进行二次开发，实现了模型试验地形断面绘制自动化的通用软件；同时以水力学计算方法为基础，完成了隧洞导流条件下单戗堤立堵截流水力计算通用应用软件的开发。

According to before experience, prevent virus attack, hacker to inbreak, prevent closure plan divulge a secret especially, it is the Olympic Games undertakes all the time the problem that the city headaches, also be the core problem that Beijing Olympic Games flies safety of news of network of closure operation center.

据以往经验，防止病毒攻击、黑客入侵，特别是防止开闭幕式方案泄密，一直是奥运会承办城市头疼的问题，也是北京奥运会开闭幕式运营中心网络信息安全的核心问题。

This code to solve the establishment point of closure convex polygon, using convex closure insertion algorithm to establish Del...

此代码用来求解建立点的凸闭包多边形，采用凸闭包插入算法建立Delaunay三角网可以用到或参考。

That the procedure was discrete points smoothing procedures, to be able to achieve an orderly group discrete data for closure and closure of the situation.

该程序是离散点平滑程序，可实现对一组有序离散数据进行闭合和不闭合情况的情况。

That the procedure was discrete points smoothing procedures, to be able to achieve an orderly group discrete data for closure and closure of ...

该程序是离散点平滑程序，可实现对一组有序离散数据进行闭合和不闭合情况的情况。

Results: Operations were immediately performed in all eight patients with AMI after final diagnosis,including six cases treated with different limitation of enterotomy; five with temporary abdominal closure and exteriorization of intestine,three with abdominal closure of venous nutrition transfusion container; seven with two-stage operation in different means.

结果：对8例急性肠系膜血管缺血疾病均于确诊后立即手术探查，其中6例做了不同范围的肠切除；5例做暂时关腹术加肠外置，3例用静脉营养输液袋关腹；7例进行不同方式的二期手术。

Objective:to investigate the effect of damage control surgeryin the theatment ofacute mesenteric ischemia.methods: a retrospective analysis was made on clinical data of eight cases with ami treated by dcs from june 2006 to december 2007.results: operations were immediately performed in all eight patients with ami after final diagnosis,including six cases treated with different limitation of enterotomy; five with temporary abdominal closure and exteriorization of intestine,three with abdominal closure of venous nutrition transfusion container; seven with two-stage operation in different means.five cases survived or improved three died, one of which died two months after discharge due to short bowel syndrome.conclusion:it is very difficult to treat the ami patients owing to the restriction of technology and equipment.

目的：探讨损伤控制外科在治疗急性肠系膜缺血疾病中的应用。方法：对2006年6月~2007年12月应用dcs理念指导救治的8例急性肠系膜缺血疾病的临床资料进行回顾性分析。结果：对8例急性肠系膜血管缺血疾病均于确诊后立即手术探查，其中6例做了不同范围的肠切除；5例做暂时关腹术加肠外置，3例用静脉营养输液袋关腹；7例进行不同方式的二期手术。本组5例痊愈或好转出院；3例死亡，其中1例为短肠综合征出院2个月后死亡。结论：在治疗急性肠系膜血管缺血疾病病人的治疗中，在许多医院因设备和技术等条件的限制，处理十分困难。

However, simply not to fontanel closure without calcium, calcium deficiency is caused more harm than good, and open and four months from BB fontanel closure is also a long time ago.

但若只单纯为了囱门不早闭而不补钙，而引起缺钙则得不偿失了，旷且四个月的BB囱门离闭合还很早。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。