查询词典 sec

The objectives of this paper were to investigate the simulation and design of continuous multiple-station rolling forming process for a U-Section Steel Bar by CAE software-DEFORMTM Due to the limitation of elements number using a short strip 120mm went through all the stations to simulate the real continuous rolling forming on factory The roller gap was fixed as 0 30mm roll speed was 20 rad/sec and progressive angles were all equal for each rolling process which were the formed angle divided by by the number of station Three rolling processes were selected with 6 9 and 12 stations respectively During simulation processes two cases occurred Case A the strip was through a single station Case B the strip across two stations Because the strip laterals side was stretched and twisted during the process The model of case B closer to the practical process than case A and the calculated stress and strain on the tip of U section for case A were lower than these for case B by up to 15% From the result of case B for each process the stress for 12-station process was smallest 9-station process second and 6-station process next Because less-station can save larger cost and forming time but the bigger stress and strain for 6-station caused wrinkles on lateral sides not found on 9-station and 12-station Therefore 9-station process was a more suitable design than 12-station process smaller stretched and twisted and stress The progressive angles for 12-station was 7 5?

本文主要是以DEFORMTM有限元素软体模拟U型钢片连续道次成型与单一道次成型以确认单一道次模拟的是否可取代连续道次模拟之研究。因DEFORMTM 软体对於网格元素上的限制故使用较短素材120mm通过所有的成型站以模拟工厂实际连续成形方法。辊轮间隙固定为0 3mm；辊轮转速为20 rad/sec；弯曲角度的方法为将成型角度平均除以成型站数。有三种辊轮成型方式被选择分别为6站，9站，与12站。在模拟的过程中有两种现象会产生 Case A，素材通过单一成型站。Case B，素材会通过两个成型站。因为在模拟过程中素材的两端会有拉应力与扭力。Case B的模拟比Case A像实际的制程，并计算应力与应变在U型断面的Tip部中可发现Case A比Case B低约15%。从Case B的每站的结果可以得知，12站的成型应力最小，9站次之，6站最后。

Air speed is about 24.5 sec/10 laps, what will happen when we can reduce the vibration??

空气的速度大约是24.5 sec/10圈，会发生什么事时，我们可以减少振动吗？

Besides, n-butyl and sec-butyl tosylate that are difficult for oxidative addition can react with phenylmagnesium bromide to form corresponding cross-coupling products. Primary alkyl halide which contains β-hydrogen and is relatively hard to undergo the reaction , n-butyl chloride for instance, can react with aryl Grignard reagents in the presence of NiB alloy as well.

此外，难以进行氧化加成的对甲苯磺酸正丁酯和对甲苯磺酸仲丁酯可以与苯基溴化镁作用生成相应的交叉偶联产物；反应相对困难的含β-H的伯卤烷，如：正氯丁烷也可以在NiB催化下与芳基格氏试剂发生偶联。

Art. I, sec. 7. Only Senators and Representatives (also known as Members of Congress) can introduce a bill in their respective chamber.

只有参议员和众议员可以在他们各自的院中提出议案。

With kinetic weapons at closing velocities in excess of 10 km/sec, you're getting into the realm where armor is less important than blow-through.

护盾在可预见的未来很难实用，原子火箭也有一些有趣的讨论，有兴趣的读者可以自己去看，这里不再赘述。

Put the ice cubes into a cocktail shaker and shake well with the vodka, Midori,Triple Sec and lime juice.

将冰块、伏特加、Midori、Triple Sec和青柠檬汁放入调酒器调制均匀。

In order to function as a single compression member, the C-sections should be connected at a close enough spacing to prevent buckling of individual C-sections about their own axes parallel to the web at a load equal to or smaller than the buckling load of the entire section. For this reason, Sec.

为了起到单个抗压构件的作用，两段U型钢要贴得足够紧，以避免各段U型钢对平行于筋的自身轴的纵向弯曲——它是自身轴的荷载等于或小于整个断面的临界纵向荷载而造成的。

Baby Diana's cream-colored nursery was in a bedroom on the sec- ond floor of Park House.

帕克庄园二楼的一间奶油色卧室成了小宝宝的婴儿房。

The direct competitor to the Scorpio Black is the BEVT model, which is also has a SATA 3Gbit/sec.

直接的竞争对手，天蝎黑色是bevt模型，这是也有一个的SATA 3gbit/sec 。

A dollar bond issued in the US by a foreign borrower, registered with the SEC.

非美国借款人在美国发行，并在美国证券交易委员会注册的美元债券。

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。