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The opened magnetic circuit is composed as tow NdFeB permanent magnets and a top plate without U-yoke. After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

开式磁路是由2片钕铁硼磁铁和主导磁板和导磁垫片组成，我们在实践过程中发现这种磁路结构不适合于低频扬声器的使用，我们通过使用FEMM（Finite Element Method Magnetics）软件包对该磁路进行了分析，该磁路的磁场范围被分成3个区域，其中在主导磁板附近形成一个正向磁场，在正向磁场的两边存在反向的磁场，音圈在工作时有很大一部分进入了反向磁场中，在反向磁场内线圈的感应电流方向与驱动电流方向相同，使得音圈呈现出负感抗特性，由于音圈的负感抗特性引起电流的增加导致音圈发热甚至烧毁，因此在扬声器中使用开式磁路时，音圈的运动范围应控制在正向磁场范围之内，否则音圈运动到反向磁场区域时将会产生很大的失真和发热，即使在设计时已经将音圈的运动范围控制在正向磁场范围之内，由于正向磁场的2个边缘磁场强度衰减太快，同时开式磁路中磁场的分布不是平行的，而是自由发散的分布，这样肯定会导致扬声器的非线性失真，因此我们得到的结论是：开式磁路并不是一个理想的磁路，它不适合于低频扬声器的使用，但它还可以应用于中高频扬声器。

After more than a final review of the CRIC, Aokang Group hundred enterprises from Wenzhou stand out, won the "outstanding private enterprises in Wenzhou culture Second Top Ten" and "Brand Award" winning two.

经过一年多的评委，奥康集团的最终审查100从温州企业脱颖而出，荣获&温州市优秀文化二十佳&和&品牌奖&打赢两场民营企业。

Through block wall experimental study we can find out that cracks would appear late and the load of crack-resisting and limit-resisting are increased obviously by the constructional measures in the wall. It is very effective method that the splayed cracks are controlled by sill ring beam, the horizontal bending cracks are controlled by structural column on the side of the wall and the horizontal cracks on the top of the wall are controlled by the whole ring beam. It is the most effective method that wall cracks are controlled by structural column, crout column and sill ring beam.

通过试验主要得到在墙体中采取构造措施后，墙体裂缝推迟出现，开裂荷载和极限荷载都有很大程度的提高，同时发现窗台圈梁在控制窗角的八字缝、墙体两侧构造柱对于防止水平弯曲缝以及全截面的圈梁在防止墙体和圈梁交界处的裂缝的出现能起到很好的效果，通过试验确定在砌块墙体中采取&构造柱+芯柱+窗台圈梁&的构造措施来控制裂缝是最为经济合理有效的。

An experimental study was carried out on simulation of hot metal injection desiliconization in ladles by way of multi-batches top addition of desiliconization reagents plus partial immersion blowing of gaseous oxygen in SiC tube furnace at 1350℃.

在实验室SiC管炉上采用分批上置法并浸入吹O2在1350℃下进行了模拟铁水罐喷吹脱硅的实验研究。

Epicauta chinensis Laporte was raised in our lab and the results indicate that the adults like to eat the leaves of clover, soybean, sugar beet and potato. The best way to serving foods to the adults is inserting the plants into bottles full of water. While the larvae like eating the ovum dollops of L. migratoria manilensis and it will be easier for the first instar larvae to find and eat with top of the ovum dollops slightly out of soil.

室内人工养殖中华豆芫菁 Epicauta chinensis Laporte 的结果表明：成虫喜食苜蓿、大豆叶，也取食甜菜和马铃薯的叶；最适宜的投食方式是将植物插入盛水的瓶内；幼虫喜食东亚飞蝗卵块，尤其是顶端微露于土表的卵块最易被中华豆芫菁1龄幼虫找到并取食。

But Ella Fant, who was filled with 23 , shouted at the top of her voice:'Look at 24 ! They're all out of 25 except my John! Isn't he the best!

第15空：既然John此时只是打算参军，还未行动，他的母亲谈到的只能是个消息，应选news。

That alone would probably get The Farseer on my list as I'm a pretty big zombiephile, but the writing and story here are both top notch. The premise sounds a little stock boy grows up never knowing his mother, turns out to be a royal bastard, etc.

像之前提到过的，《时光之轮》有一个庞大的角色阵容，一个完全真实的拥有数十个种族和国家的世界，通过庞杂的分支相互交错串联从而组成史上最伟大的奇幻系列。

"I am coming from Fitcher's house.""What is my young bride doing there?""She has swept the house from bottom to top, and now she is looking out of the attic window."The bridegroom looked up.

她准备了一个咧嘴露牙的骷髅，给它戴上花环，装饰了一下，然后将它放到阁楼上的小窗口前，让它从那里往外看着。

If someone with money always comes out on top, whether through flouting the law or cheating other people, proper social morality will not flourish.

如果有钱的人总是高高在上，哪怕是他的钱是通过藐视法律或欺骗别人得来的，正确的社会道德就不会繁盛。

Jón sgeir Jóhannesson, the former top shareholder in Glitnir and a big investor in the UK retail sector, is alleged in the lawsuit to have conspired with associates to "fraudulently drain over $2bn out of the bank to fill their pockets and prop up their own failing companies".

乔恩·奥斯吉尔奥·约翰尼森(Jón sgeir Jóhannesson)曾是格里特利尔银行的最大股东，也是英国零售业的一大投资者，他被指控与同伙合谋，&从格里特利尔银行诈取逾20亿美元，将其挪为私用，并支撑其濒临倒闭的公司&。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。