分两次

Mud am Single and dual role of the two kinds of type, single-acting piston-type mud pump reciprocating movement in only one cycle of action to complete a suction drain.

泥浆泵分单作用及双作用两种型式﹐单作用式泥浆泵在活塞往复运动的一个循环中仅完成一次吸排水动作。

Or if amicability isn't your strong suit, wait two and a half minutes after you've retrieved the last of your belongings from her place, then de-friend your heart out!

如果友善不是你的长处，等待两分半钟后在你最后一次从她的地方取回你的物品后，然后你的心就不再友好了！

The structure theorem is obtained by defining "ternary ordered partition method" which is used to choose the test-sets of the first $k$ tests, and by defining two operations and two relations on feedback sequences; The isomorphism classification theorem is strictly proved by virtue of the structure theorem, thus the complicated problem of discussing $3^k$ possible search domains is reduced to the relatively easy problem on $k+1$ representative search domains; By the techniques of "super-coin construction method" and "image-union method", the search problem on $k+1$ representative search domains is reduced to the simple verification of several conditions on finite space of small cardinality.

通过引入用于选取前$k$次试验的试验集的"三元有序剖分法"以及关于反馈序列的两种运算和两种关系，得到了结构定理；基于结构定理严格地证明了同构类定理，从而将必须针对$3^k$个搜索域的复杂问题转变为讨论$k+1$个具代表性的搜索域的相对简单的问题；通过"构造超币法"和"并像法"等技术手段，将关于$k+1$个具代表性的搜索域的搜索问题转化为简单的关于势非常小的有限空间的几个条件的验证问题。

to reduce the impact of carrier frequency offset in ofdm system,this thesis designs a new carrier frequency offset estimation scheme for ofdm system.the carrier frequency offset estimation includes acquisition and tracking.we adopt variable step size adaptive algorithm.the acquisition range of the proposed algorithm is as large as one half of the overall signal bandwidth.through this method we can not only avoid the feedback by using forward error correction,but also reduce the times of complex multiplication in order to reduce the power consumption of the system.this algorithm not only has low complexity and fast convergence nut also can improve the demodulation performance of ofdm system.computer simulation illustrates the superior performance of the proposed algorithm with regard to estimation accuracy in both awgn channel and multi—path channel.

摘 要：为了减小正交频分复用系统受频率偏差的影响，在ofdm系统中设计了一种新的载波频偏估计算法。频偏估计包括跟踪和捕获两个阶段，文中采用变步长自适应算法来进行跟踪，这个跟踪算法的捕捉范围是整个信号带宽的一半。通过此方法，不但可以利用前向纠错的方式来避免反馈，而且可以缩减复数乘法的次数以降低计算复杂度和系统功耗。该方法运算复杂度低，并具有较好的收敛性，能改善odfm的解调性能。从计算机的仿真效果可以看出无论是在awgn信道上还是在多径信道上都表现出了卓越的性能。

Based on the samples of over 1000 listed companies at the beginning of Reform of Non-tradable Shares in 2004 and 2006, the share proportion CR1 of the largest shareholder, Z index calculated as the ratio of share ratio of top 2 shareholders and H10 index calculated as the sum of square of share ratio of top 10 shareholders, and Tobin'Q reflecting the value of target company are sele

本文以股权分置改革开始的前后两年即2004年和2006年的一千多家中国上市公司为研究样本，选取第一大股东持股比例CR1、前两大股东持股比例的比值Z指数以及前十大股东持股比例的平方和H10指数作为衡量大股东控制程度的指标，采取托宾Q值来作为衡量公司价值的指标，把公司规模、财务杠杆和第一大股东性质虚拟变量作为控制变量，建立回归方程，实证结果发现三次？

In this text we used the method of volume integral equation base on tensor Green's function to study the forward of 4D transient electromagnetic response.

本文采用基于张量格林函数的体积分方程法进行四维模型瞬变电磁响应的正演研究，文章中首先说明了四维瞬变电磁法模拟的可行性及程序实现，然后分别设计了两个三维异常体模型，采用两种观测方式(激发与接收平行、激发与接收垂直)进行正演模拟计算，并对所得的二次总场的数据进行了分析。

CASE REPORTS96 cases of postpartum women at a week were with the score more than 1 of striae of pregnancy were divided into 2 groups. In experiment group, the PLACENTRA was applied externally to the abdominal region of the women twice a day. 2 months later, the two groups were graded with severity of striae of pregnancy again. Total effective rate between the 2 groups was significant different.

病例报告］将96例腹部妊娠纹评分高于1分的孕产妇随机分为2个组，给实验组产妇腹部涂抹PLACENTRA营养霜，每日2次，2个月再次给两组患者进行腹部评分，比较见两组总有效率间有明显差异。

He also had four double-doubles for the month including games of 11, 12 and 15 assists. The Sixers went 4-8 in November.

他在这个月的比赛中打出了4次两双，助攻数分别是11，12和15次。76人在11月的战绩为4胜8负。

After that, pour out the herbal juice to get a small half of bowl (approximately 100 ml), then add water to the pot and boil it with the above method, boil the herbs like this totally for five times, finally put the herbal juices together, and take it warm every two hours, one fifth of it at a time and one packet every day.

上药共入锅中，加水约两大碗，大火煮沸后，改为小火煮三十至四十分钟，取药汁约小半碗倒出，再加水依上法煮之，连煮五次，将药汁合为一处，二小时温服一次，每次服五分之一，日一帖。

And if you think that Jordan, a five-time NBA MVP, a six-time Finals MVP, a two-time Olympic gold medalist and the greatest per-game scorer in NBA history (30.1 ppg), will need to buy a ticket to walk through the Hall's doors in Springfield, Mass.,… well, you're on the wrong website.

而如果你认为五次NBA MVP，六次总决赛MVP，两届奥运会金牌得主和NBA史上最伟大的得分手（场均30.1分）的乔丹需要买一张票走过位于马萨诸塞州斯普林菲尔德的名人堂大门……那么，你走错网站了。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。