置换

These data suggest that the terminal hairpin structure and ITRs of PfDNV play a key role in the rescue and gene correction process: sequence at the junction of the terminal palindrome of PfDNV genome and the pUC119 can form typical Holliday structure, it can be cutted by the special endonuclease, then the exposed 3'hairpin structure serving for a self-primer to initiate viral DNA replication; and the intact extremity acting as a template to repair another altered end within inverted terminal repeats.

说明存在着一种拯救和基因修复机制，推测与PfDNV基因组末端结构（Hairpin、ITR）有密切关系：PfDNV基因组与pUC119质粒连接处可形成Holliday结构而被识别该结构的核酸内切酶所切割，游离下的基因组3'发夹结构作为引物起始复制，然后被置换链的完整的5'ITR作为模板修复部分缺失的另一端ITR，推测这个过程需要病毒NS蛋白以及细胞因子的参与。

A self-converse Mendelsohn packing design of order v, denoted by (v, k,1)-SCMP, is defined to be a triple, where B is a collection of k-circuit of X such that every ordered pair of distinct points of X appears in at most one block of B, and / is a permutation on X such that Here, and whenB=(x0 ,x1,xk-1). The number of blocks in a (v, k, 1 )-SCMP is upperbounded by where 1 if v=l ande =0 , otherwise.

一个阶为v，区组大小为k的自反Mendelsohn填充设计，记为—SCMP，定义为一个有序三元组，其中X为v元点集，B为X的一族循环有序k元组，f为X上的一个置换，它满足如下性质：(1)对任意x，y∈X，x≠y，有序对至多包含在一个区组中；这里区组当且仅当和一个—SCMP所含的区组个数不超过，其中当V(v-1)≡1时，ε=1；否则ε=0。

Durng the construction of continuous underground wall, after the hole is drilled by special drilling machine to set depth, grout is first pressed via the core tube of drilling rod to the hole, sealing device and the reinforced bar cage are then set in the hole, and concrete is finally deposited with the displaced grout is recovered.

本发明涉及一种地下连续墙的施工方法，用专用钻孔机钻孔，达到预定深度后，经钻杆内芯管向孔底压注水泥浆，直至浆面高于易塌孔位置，在注满水泥浆的槽孔中放置封口器，再放钢筋笼，从孔底开始灌注砼，同时由孔中回收被砼置换上来的水泥浆。

This paper focus on the feasibility study on combination of seal and extrusion to hole formation and rammed cement soil pile, and its application on wet and sinking loessial area; gave a research method of bounds replacement rate for eliminating the wet or sinking of loessial area; and study on value access method of bearing capacity parameter for technology calculation.

结合了具体工程实践，本课题的主要研究内容：①研究挤密成孔法与夯实水泥土桩组合的可行性，及在湿陷性黄土地基中的应用；②给出使黄土湿陷性消除的界限置换率研究方法；③对采用此工艺计算承载力时参数的取值方法进行研究。

The new ideas from this paper: using mechanics principle study of soil, create a practical test to prove that it could change the physical mechanics character of base soil completely, reducing distortion, improving strength, and eliminating wet or sinking of base soil by seal extrusion during hole formation process at certain replacement rate; it could strengthen the loessial soil base to high bearing capacity to standard value of 300 to 400kPa through seal extrusion to hole formation technology together with rammed cement soil pile. Some value of the parameters adopted by bearing capacity calculation of the composite base of rammed cement soil pile with seal extrusion to hole formation exceeded the criteria of 'Technical Regulation on Building Ground Treatment'.(JGJ79-2002) This technology meet the design requirements and save investment.

本课题的创新点：1 利用土力学原理进行研究及理论推导，并经实践：证明了在置换率为某一定值的情况下，在成孔过程中通过挤密作用可以从根本上改变地基土的物理力学性质，使地基土的变形减小，强度提高，湿陷性消除；2 挤密成孔工艺与夯实水泥土桩的组合，可使低强度的湿陷性黄土地基变成高强度的复合地基，其承载力特征值可达 300~400kPa；3 挤密成孔法夯实水泥土桩复合地基承载力计算所采用的有关参数取值范围超出了《建筑地基处理技术规范》JGJ79-2002 中的有关规定；4 在节省投资的前提下，解决了地基高承载力、低变形及黄土湿陷性问题，达到了设计要求。

Trough the analysis of stabilization safety on Tengzigou arch dam, some conclusions are obtained in the following:(1) Tengzigou arch dam is safe under normal poll level ;(2) stabilization safety factor of Tengzigou arch dam is about 4-5;(3) It is proved that combinatorial reinforcement measures are effective and feasible.

对藤子沟拱坝的数值计算和模型试验分析表明：(1)藤子沟水电站在正常蓄水位作用下，坝体和两岸坝肩是稳定的；(2)藤子沟拱坝的整体安全度大概为4～5左右；(3)东北院提出的对左岸泥岩层挖除处理并用混凝土置换的加固除险措施经研究表明该加固措施是有效、可行的。

A mathematical mode for circle parameters evaluation is e stablished, the corresponding software is designed and has been applied to the m easurement software of universal tools microscope successfully. A practical case for measuring a ring gauge's diameter and roundness error by the image method is given.

建立了圆参数评定的数学模型，设计了相应的误差评定软件，成功地应用到了微机型万能工具显微镜的测量软件上，并给出一个影像法测量光滑环规直径和圆度误差的实例，将改进置换算法的评定结果与其它评定方法进行了比较。

In this study, novel nanostructures of metal copper are discovered, including dendritic shape, wire shape and ribbon shape. Those were fabricated using galvanic displacement reaction on aluminum grid. We found that cetyltrimethylammonium chloride played an important role to affect the morphology of the products.

本论文的研究乃在於利用简易的贾凡尼置换反应，於溶液中添加十六烷基三甲基氯化铵(cetyltrimethylammonium chloride； CTAC)与HNO3以合成树状、线状与缎带状奈米铜。

effective prevention and care measures for joint replacement of deep vein thrombosis after have important significance.

有效的预防和护理措施对关节置换术后深静脉血栓的形成有重要意义。

joint replacement of deep vein thrombosis after prevention and care.

目的 探讨关节置换术后深静脉血栓的预防及护理。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。