单级

To improve the performance of single SBBR completely autotrophic nitrogen removal system and study the influence of aeration/non-aeration ratio on it, four reactors were applied in the experiment.

为提高SBBR单级自养脱氮系统脱氮性能并考察DO和曝/停比对SBBR单级自养脱氮系统的影响，采用4组对比试验进行研究。

The signature of a gas made up by these monopoles has also been observed in heat capacity measured by Bastian Klemke.

这个提供了深远的证据说明磁单级子的存在性，并展示给我磁单级子之间的相互作用，将和电荷是一样。

2SKW is also used as vacuum pump; it is especially applicable to the high vacuum condition and high discharge pressure vacuum compression condition, which can not be completed by common single-stage pump, thereby, the serviceable range of SKW single-stage pump is widened.

2SKW也可用作真空泵，特别适合于单级无法比拟的高真空工况和出口压力要求较高的真空压缩工况，从而拓宽了SKW单级泵的使用范围。

The system may be configured as either a single-stage mode wherein the first gearset assembly (42) is received in the gearbox (40) to produce a rotational speed adjustment between the shafts, or a multi-stage mode wherein both the first and second gearset assemblies (42,44) are received in the gearbox (40) and are connected in series to produce a different rotational speed adjustment.

本系统可构造成单级模式或者多级模式，在该单级模式下第一齿轮组组件容纳在齿轮箱内以便在所述轴之间产生转速调节，在该多级模式下第一和第二齿轮组组件都容纳在齿轮箱内并串联连接以便产生不同的转速调节。

But the effluent ammonium in the anoxic reactor, where enough NO2 were present, was equal to the blank system, and no ammonium was converted to such nitrogen compounds as NO2- and N2 by Nitrosomonas eutropha using NO2 as electron acceptor, which maybe caused by lack of the function bacteria. There were two ANAMMOX reaction pathways in the one-stage autotrophic nitrogen removal system. One way was that after part of NH4+ was oxidized to NH2OH under aerobic conditions, NH2OH and NO2- were converted to N2O under anaerobic conditions, at last N2O was further converted to N2 which realized the nitrogen removal; Another way was that at first NO2- was reduced to NH2OH, NH2OH reacted with NH4+ to form N2H4, which was further converted to N2 subsequently, realizing the nitrogen removal.

结果表明：单级自养脱氮系统内6.72%的氨氮是通过吹脱等物化作用去除的，不超过6.02%的氨氮是通过传统硝化反硝化途径去除的，87.26%左右的氨氮是由自养脱氮途径去除的，自养脱氮反应起主要脱氮作用；在足够NO2存在且缺氧的条件下，单级自养脱氮系统内的出水氨氮浓度与空白反应器相当，NH4+并没有被亚硝化单胞菌以NO2为电子受体氧化为NO2-和N2等化合物而得以去除，可能是因为系统内不存在该代谢功能的亚硝化功能菌；单级自养脱氮系统内存在两条ANAMMOX反应途径：其中一条途径即NH4+在好氧条件下被氧化为NH2OH后，生成的NH2OH与系统内的NO2-在缺氧条件下被转化为N2O，N2O则进一步被转化为N2而实现氮的去除；另外一条途径即NO2-首先被还原为NH2OH，生成的NH2OH则与系统内的NH4+反应生成N2H4，N2H4继续被转化为N2而实现氮的去除。

started with the analysis of characteristic parameter of the successive detection logarithmic amplifier,mainly discusses the main factor affecting its transfer characteristic by mathematics reasoning to its transfer function,studies the correlative relations of the single stair′s plus,the series with the dynamic range and the logarithmic precision by matlab and matrixx simulation.so two pieces of conclusion have been reached:one is on condition that the dynamic range is limited,the more the series that is used and the single stair′s plus is less,the higher the logarithmic precision is.the other is that using the double amplifier chain can enhance the logarithm starting point,so its stability is improved.and the conclusion has been applied to the practical circuit′s analysis of the tacan beaconing receiver.

摘 要：从分析连续检波式对数放大器的特性参数入手，对其传输函数进行了数学推导，重点讨论了影响其传输特性的主要因素，通过matlab和matrixx仿真，研究了输入动态范围与级联级数、单级增益和对数精度的相互关系，得出了两点结论：一是在限定动态范围的前提下采用的级数越多其单级增益越小而精度就会越高，二是采用双放大链结构可以提高对数起点，从而提高其稳定性。最后将结论应用于塔康信标接收机实际电路的分析中。关键词：对数放大器；连续检波；塔康信标；对数精度

The effects of single aging,duplex aging and conditions between the first and second step agings on the microstructures and properties of the extruded plate of 7050 aluminium alloy were investigated,by means of TEM,tensile and conductivity tests.

采用力学性能和电导率测试及透射电镜组织观察的方法，研究了7050合金挤压带板的单级时效、双级时效及两级时效之间处理条件对合金组织和性能的影响。

Like the single-stage regulator, outlet pressure from the first stage of the two-stageregulator rises as cylinder pressure decreases.

同单级减压阀一样，两级减压阀的第一级的出口压力随钢瓶压力的降低而升高。

Like the single-stage regulator , outlet pressure from the first stage of the two-stage regulator rises as cylinder pressure decreases.

同单级调整器一样，两级调整器的第一级的出口压力随钢瓶压力的降低而升高。

Multiple class partial flow pump:(1)The head coefficient value should be low in the single class partial flow pump.(2)The total area of larynx wicket gate should be 200% the single classs larynx area.

2对于多级部分流泵：(1)部分流多级泵扬程系数的取值应比单级部分流泵的取值偏低一些；(2)部分流多级泵导叶总的喉部面积应是单级部分流泵喉部面积的两倍。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。