易发现的

Centrifugal energy saving analysis and measures: 1 improve the efficiency of centrifugal pumps a first step, in the selection of comparison, when many suppliers Selection program, in considering the cost-effective choice as far as possible under the premise of efficient programs; the second step , accredited professionals must Mill producers, affecting the pump efficiency of the key components such as impellers, pump body, pump cover, diversion devices, such as the manufacture of quality producers, especially for the airfoil impeller , outlet angle, leaves the sub-degrees, the shape of flow channel, to control the quality of finish, etc., so that products are delivered in the current production under the conditions of highly efficient products; the third step, the scene in the production of installation and debugging process, pump to ensure a solid foundation, with the driving machine for good, before and after valve flexible piping layout design is reasonable, on-site control is feasible and safe, the complete and accurate monitoring instrumentation to ensure that pump operation can carry out real-time monitoring; fourth step , are at long-term operation of water pumps necessary to pay attention to the equipment inspection and found anomalies reflect real-time reporting, in the normal minor repairs, overhaul cycle, to deal with the replacement of wearing parts inspection to ensure the pump's long-term safe and efficient operation.

第一步，在选型时多比较各供应商的选型方案，在考虑性价比的前提下尽量选用效率高的方案；第二步，派驻一定的专业人员驻厂监制，对影响水泵效率的关键零部件如叶轮、泵体、泵盖、导流器等的制造质量进行监制，尤其对叶轮的翼形、出水角、叶片的分度、流道的形状、光洁度等质量进行控制，使交付的产品是在当前的生产条件下的高效率的产品；第三步，在生产现场的安装调试过程中，要保证泵的基础牢靠，与驱动机对中良好，前后阀门开关灵活，管道布置设计合理，现场控制安全可行，各运行监控仪表齐全准确，保证泵的运行过程能够进行实时监控；第四步，是在水泵的长期运行中要注意对设备的点检，发现异常情况即时反映汇报，在正常的小修、大修周期中，应对各易损件进行检查更换，保证泵的长期高效安全的运行。

ABSTRACT:The half-power bandwidth method is the commonly used method at home and abroad, the authors discover that factors, such as the sampling frequency, the frequency resolution, the ratio of the sampling frequency to the signal frequency, the analyzed width and the damping ratio, make the estimated damping ratio fluctuate vastly. Mostly the result is incredible except for some conditions, the error is sometime amazing, which is not acceptable.

半功率带宽法是国内外常用的测试阻尼的方法，笔者发现半功率带宽法由于受到信号处理中的①采样频率SF②频率分辨率△f③采样频率与信号频率之比K ④采样分析的长度T和⑤阻尼比D的大小等因素的影响使得测得的阻尼比值波动很大，除少数状态是可信的外，多数状态是不稳定的，有时误差惊人，得到的测试数据不能使用，易导致错误的结论。

Later, under the untypical parasternal four-chamber view which can thoroughly display the ostium of coronary sinus, the catheter was promoted further to the ostium of coronary venous sinus. Then the echocardiography technician adjusted the transducer of TTE in order to thoroughly confirm the position of the catheter tip. After confirming the position of catheter tip in the coronary venous sinus, the operator inserted the catheter into the coronary venous sinus for 3～4 mm farther. It was noted that if resistance was encountered by operator, the operation must be stopped, which was the same as x-ray fluroscopy as image guiding. TTE guiding His bundle elactric cahteter、high right atrium electric cahteter and right ventricular electric catheter in site: It is difficult using TTE singly since there are too many crossroads in inferior venous.

本研究结果显示，(1)单独应用TTE作为影像学引导进行冠状窦电极导管置放的成功率为93.8％～96.7％，并且应用TTE作为影像学引导放置专用冠状窦电极导管和普通电极导管的成功率和放置时间在统计学上无显著差异；(2)TTE作为影像学引导，除过度肥胖患者外，可完全替代X线引导进行冠状窦电极导管置放，包括鞘管和扩张管的放置、指引导丝在静脉而非动脉内的证实均可由TTE完成引导，且较X线C型臂有一定优越性；(3)TTE结合普通X线胃肠透视机作为影像学导引，可顺利完成心内电生理检查时导管的安全到位，而不需昂贵的X线C型臂，可将心内电生理检查扩大到广大的基层医院；(4)TTE较X线更易和更早期发现介入治疗的并发症如急性心包填塞等，对并发症的防治甚至挽救病人的生命至为重要；(5)动物实验研究表明，TEE可引导射频导管消融术时大头电极导管成功到位。

If you could see inside his brain, as his enemies no doubt hoped to, you would find it primed to attack and defend in every way possible, with a straight-moving rook or a sidling bishop, or with both in his favourite Ruy Lopez opening, or with the queen swallowing an early pawn in the "poisoned" version of the Sicilian, or a thousand others.

如果你能像他的对手希望的那样看透他大脑中的想法的话，你将会发现随时准备好的以各种可能的方式发起的进攻和组织的防御，比如在他钟爱的路易洛佩兹开局中直行的车，斜着走的象，或两者的组合；又比如在西西里开局一个奇特变例中吃掉出头兵的后，或像其他上千种的方式。

The results show that:(1) Light-calcined MgO powders prepared with nature magnesite or Mg2 both are of face-centered cubic structure.

结果发现：水化前后得到的都是面心立方晶体结构的MgO，但水化前得到的轻烧MgO中仍存在官能团CO32-的残留物，而水化后得到的轻烧MgO中不存在CO32-，而且颗粒变得较易破碎，大大减少了细磨时间；再者，水化后的轻烧MgO活性较高，加上Mg2在分解过程中残留的水分对MgO 的烧结起催化作用，因此，使其经高温锻烧制得的烧结镁砂的开口气孔率由水化前的2.0%下降到0.6%，闭口气孔率由水化前的6.1%下降到2.8%，体积密度由水化前的3.29g/cm3提高到3.46g/cm3。

With this in mind, the researchers then reanalysed data from knowingly HIV-positive heterosexual subjects in Uganda and Zambia who had HIV-negative sexual partners. Those with a viral load of one million particles per millilitre were more than ten times more likely to accidentally infect their partners each year than those with a load of one thousand.But when the researchers calculated the transmission potential over the entire predicted asymptomatic period, those with viral loads between ten thousand and a hundred thousand copies per millilitre of blood were the most likely to infect their partners. HIV-positive subjects with viral counts of 50,000 infected roughly twice as many people as those with counts of one million.

伦敦帝国学院流行病学家Christophe Fraser和他的同事对收集于1982年到1993年之间的100多例HIV阳性的男性同性恋者的数据进行分析，并结合分析来自乌干达和赞比亚的已知有HIV阴性性伴侣的HIV阳性异性恋受调查者的资料，他们发现中度病毒负荷而无症状的HIV携带者更易播散HIV，这是因为中度病毒负荷的HIV携带者的无症状期较长，而那些高病毒负荷而无症状的HIV携带者虽然传染性稍强，但其传染的持续时间却很短，并且在未经治疗的HIV携带者个体中中度病毒负荷是最常见的人群。

The author discovered in the exploration, firstly, in Zhu Xi"s reading view both pays great attention the reader to text"s assurance, causes the reader as not to be separated from the text so as to do surpasses the text threshold the understanding, and pays great attention the reader individual experiences seepage to the influence of the reading result which causes the reader not only book not on only, displays the reader individuality fully; Next, Zhu Xi's opinions pays attention to the familiarity with fine thinking, thought that is familiar with fine thinking is the understanding foundation, thinking in reading, reading in thinking, can have a feeling to become aware, also pays great attention to fulfilling experience, thought that the reader wants to experience attentively at the same time, pursues internal conjunction of the reader's and the author's mind, pursues a kind of communication of mind, on the other hand we must use the practice to experience, and to pursue the reader's reading result and the life exchange, only then such reading result can penetrate thoroughly; Finally, Zhu Xi's view also pays great attention the knowledge that soaks thoroughly the penetration. It is thought that the reader must proceed in an orderly way, neither anxiously nor slow, work carefully and make steady progress from the easy to the difficult, and using analogy to make the knowledge interpenetration, learn with a lively mind, and increase reader's ability for the next reading .

在探索中笔者发现，首先，朱熹的阅读观中既注重读者对文本本身的把握，使读者不至于脱离文本做超出文本阈限的理解，又注重读者个性经验的渗透对阅读结果的影响，使读者不唯书不唯上，充分发挥读者个性；其次，朱熹阅读观还注重熟读精思的重要性，认为熟读精思是理解的基础，在读中思，于思中读，才能有所感悟，又注重体验践行，认为读者一方面要用心体验，追求读者与作者心灵内部的契合，追求一种心灵的对话，另一方面要用实践去体验，追求读者阅读结果与生活之间的交流融通，只有这样的阅读结果才能深入透彻；最后，朱熹阅读观还注重知识的浃洽贯通，认为读者读书要循序渐进，不急不缓，由易到难一步一个脚印去做，并运用类推的方法使知识相互贯通，活学活用，使读者的下次阅读受益。

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。