查询词典 at

To give the definition of the mass concrete and to concrete\'s cracks together with practical meanings of control ,and give a brief review on the research in the field at home and abroad, at last, methods to control temperature crack of the mass concrete from several aspects such as design measures,concrets material, construction schedules.etc are summed up; To explain the physical mechanics of the concrete and computing methods-Difference Method and Finite Element Method, and illustrate the application of their specific methods repectively;Several temperature factors that can influence the temperature stress of mass concrete baseplate are analyzed. The influence degree of temperature factor can be got through the ANSYS simulation computation the control of temperature can control the temperature stress, consequently control the temperature crack of mass concert baseplate; through the influence of the crack resistance ability of mass concrete baseplate which takes the reinforcement as a part is analyzed. By ANSYS simulation, the best suited volume ratio of reinforcement is found out, at same time the layout of reinforcement with the same volume ratio can also affect the resistance ability of mass concrete baseplate. Sum up of above analysis, anti-crack function of steel bar in early mass concrete baseplate is obvious, so it\'s necessary to consider beneficial effect of construction steel bar in research of temperature control on mass concrete baseplate.

本文先容了大体积混凝土及混凝土裂缝的基本概念，对国内外在这个领域里的研究现状作了扼要叙述，并从结构设计、混凝土材质、施工措施等方面总结了大体积混凝土温度裂缝控制的方法及防止措施；阐述了混凝土的基本物理力学性能，总结了大体积混凝土温度计算的方法——差分法和有限元法，并分别举例说明其具体应用的方法；分析了影响大体积混凝土底板温度应力的几种温度因素，利用ANSYS模拟计算，得出了每种因素的影响程度，通过分析提出了在这几种温度影响因素下如何通过控制温度以达到控制温度应力从而来控制裂缝的具体建议；针对大体积混凝土基础底板中配筋的不同对混凝土底板抗裂能力的影响不同，利用ANSYS进行模拟分析，得出底板中最合适的体积配筋率，同时分析了在相同体积配筋率下钢筋的具体布置对大体积混凝土基础底板抗裂能力的影响，分析表明，配置钢筋对混凝土结构的开裂阻止作用明显，在研究大体积混凝土温度裂缝题目时，要考虑钢筋在其中的有利作用。

The 20S catalytic core of the 26S proteasome has the shape of a barrel made of four rings which are composed of seven differentαsubunitsα_1-α_7 at two outer rings and seven differentβsubunitsβ_1-β_7 at two inner rings at which the catalytic sites locate. Three of theβsubunits contain proteolyses sites, which are sequestered in the hollow interior of the 20S particle. Substrates enter the 20S through a narrow channel formed by theβsubunits, whose N-termini, depending on their conformation, can either obstruct or allow substrate entry and thus function as a gate. This entry channel is narrow and only permits passage of unfolded, linearized polypeptides.

哺乳动物26S蛋白酶体是由一个20S催化颗粒(catalytic particle，CP)和两个19S调节颗粒(regulatory particle，RP)组成的ATP(adenosine-triphosphate，ATP)依赖性蛋白水解酶复合体。20S CP是26S蛋白酶体的催化核心，它是由4个圆环堆叠形成的桶状复合物，其中两侧外环每个环是由α_1-α_7亚基组成，两个内环每个环是由β_1-β_7亚基组成，4个环的中央形成一个狭窄的内腔。2个β内环形成了20S CP的催化中心空腔，其内壁为催化活性位点所在地；外侧α环中心的孔道是底物到达催化中心空腔的通道，一般被α亚基上的N末端所封闭，阻止胞内非目的靶蛋白进入20S CP内被降解破坏。

At that time, everybody runs to go to work, at 11 o'clock half punctual enjoy free lunch, arrived to was controlled at 6 o'clock afternoon, everyone comes off work, the barroom carouse that or goes to a company, or attends all sorts of parties, or it is ego abandon (normally around Manhadu have the) on front courtyard, what so as to celebrates joyously a network to live is historic appear.

当时，所有人都跑去上班，11点半准时享受免费午餐，到了下午6点左右，所有人都下班，要么去公司的酒吧间畅饮，要么参加各种聚会，或是自我放纵(通常在曼哈顿附近的有庭上)，借以欢庆网络生活的历史性出现。

At 0-60 ℃, the maximum fluorescence intensity of GCS-EPF decreased on heating and the relationship between fluorescence intensity and the change of temperature was linear; At pH=0-13.5, its fluorescence intensity increased with basification and completely disappeared at very acidic pH.

结果表明，修饰后水溶性壳聚糖的水溶液、固体粉末和薄膜在520 nm附近具有较强的荧光发射，其荧光强度不仅在0-60 ℃时对度有较快敏感响应，同时在pH=0-13.5时对pH也有较快敏感响应，具有双重敏感响应，因此可将其作为温度荧光探针和pH荧光探针的高分子材料。

I do not know well at the world, the most-awaited summer than at dusk, wearing her mother's basket with their own batik cloth at the end of white flowers give me a small sewing pants, and a group of small partners青石板from the high bridge jump jump under the fish into the wild geese as cool as that pond fairy tale world.

在我未谙世事时，最盼望的莫过于在夏日的黄昏，穿着母亲用自家蜡染的篮底白花布给我缝制的小裤衩，和一群小伙伴从高高的青石板桥上纵身跳下，鱼雁般潜入那池童话般清凉的世界里。

At a thousand house sthey knocked,and a thousand times they were refused rest and food and drink.At last they arrived at a humble cottage,where the old couple Baucis and her husband Philemon lived.

最后他们来到一间简陋的小茅屋前，这里住着鲍西丝和她的老伴费莱蒙，老俩口虽一贫如洗，却也乐天知足，与世无争。

Mr Bayard, who is a professor of French literature at the University of Paris (his book was a bestseller in France earlier this year), says airily that he must often talk about books he has at best skimmed, at worst not even opened—sometimes even with the books' authors.

巴黎大学的法国文学教授巴雅得（他的书是今年早些时候的畅销书）轻快地说，他必须经常谈论他所翻阅过的书籍，哪怕不是在公开场合下——有时候甚至是跟书的作者。

Adults at home have to take care of the children at home to be a long time feel at home and kindergartens, there are gaps.

在家有大人宠着、照顾着，宝宝在家待久了就会觉得家里和小宝宝园里有差距。

Dashing ITe and tITe like a bedbug, gatITing butts now and then, at whiles furtively, at whiles brazenly; sitting down on a bench and squeezing my guts to stop the gnawing, or walking through the Jardin des Tuileries and getting an erection seeing at the dumb statues.

于是我像臭虫相同东跑西颠，时不时地捡几个香烟屁股，有时偷偷地捡，有时又腆着脸公开捡。有时我坐在长椅上勒紧裤腰带止住饥饿的折磨，有时穿过杜伊勒利花园，边望着那粗笨的塑像边勃起一回。

As, supply, abroad, notice, spend, certain, take a look at, agree on, do a lot of walking, at least, at the beginning, all over the country, plenty of, begin...with..., set up, a training , far away, as follows, a Sound Lab, put up, by seaHow long have you had...?I say, let's go out for a drive.We'll meet...Don't be late.

本单元的对话是以围绕新车的话题而展开，对话内容较简单，容易理解和掌握，如：how far， how long等同时也给学生们介绍关于通知的一篇文章，本单元的课文是以新工厂的建立为话题，了解新工厂的建立给人们的影响。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。