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Researched influence of frequency on characteristic of electromagnetic wave transmission in tunnels, and analyzed characteristic of electromagnetic wave transmission in circular, arches and curved tunnels by method of metal wave guide, and gives approximate formulas of attenuation rate. Main conclusions we obtain are as follows: in circular,rches tunnels, if frequency is higher, attenuation rate is smaller, it is beneficial for EM waves to transmit, in curved tunnel, higher frequency, more attenuation rate ...

研究了频率对井下电磁波传输特性的影响，采用金属波导法分析了圆形、拱形及弯曲隧道中电磁波的传输特性并给出衰减率近似公式，得出主要结论：在圆形和拱形隧道中，频率越高，衰减率越小，越有利于电磁波的传播；在弯曲隧道中，频率越高，衰减率越大，不利于电磁波的传播；通过特性曲线与井下实验数据相比较得出在900MHz左右为井下无线通信系统传输信号最佳频段。

These conclusions provide the basis for cladding design of high-rise buildings.

这些结论为高层建筑围护结构的设计提供了参考。

The results indicate: 1 closed- loop gain and open-loop gain to meet basic relationship; 2 the stability of feedback is enhanced and output resistance increased. Furthermore, the result of open-loop and closed-loop gain of theoretical calculation is consistent with simulation which is applied by EWB software, which confirmed elementary conclusions and relationships in negative-feedback amplifier quantitatively.

结果表明：闭环增益与开环增益满足基本关系式；引入负反馈后稳定性得以提高，输出电阻增大；同时使用EWB对开环与闭环增益也进行了仿真分析，结果与理论计算一致，从而定量地验证了负反馈放大电路中的结论与关系。

Follow-up of 45 cases, with 0.5-3 years duration, showed 6 cases had ulcer recurrence. Conclusions: Simple closure operation is effective on acute perforated duodenal ulcer. Normal anti-ulcer and Hp therapy can effectively decrease recurrence rate of ulcer and incidence rate of complication.

行单纯修补术治疗十二指肠溃疡急性穿孔疗效确切，术后行正规抗溃疡及根除Hp治疗能有效降低溃疡复发率和并发症的发生率。

Followup of 45 cases, with 0.53 years duration, showed 6 cases had ulcer recurrence. Conclusions: Simple closure operation is effective on acute perforated duodenal ulcer. Normal antiulcer and Hp therapy can effectively decrease recurrence rate of ulcer and incidence rate of complication.

行单纯修补术治疗十二指肠溃疡急性穿孔疗效确切，术后行正规抗溃疡及根除Hp治疗能有效降低溃疡复发率和并发症的发生率。

The simulation results indicated that the data processing method is effective and feasible. Besides, some valuable conclusions were gained. To research autonomous positioning and attitude determination about satellites cluster, we set the DS-3 mission as the background.

最后，结合美国的DS-3计划，我们对网络星座的自主定位问题进行了研究，给出了相对定位、定姿以及整网绝对姿态确定的方案并进行了仿真，还对基线数量的选择和部署方式进行了初步研究。

For molasses meal trial,the conclusions show that 50% molasses can well absorbed by corn cob meal in Molasses Meal,and mould inhibitor also required in this kind of product.

糖蜜粉的研制结果表明：糖蜜的添加量可以达到50％，最佳的糖蜜载体为玉米芯粉，需加入双乙酸纳等防霉剂，该产品可以满足配合饲料加工的要求并能达到一定的贮存期限。

Louis and cochairman of the SCCM Congress program committee, told Medscape that while the finding about increased infection rates among off-pump surgery patients is interesting, the study "can do no more than generate a hypothesis about the role of inflammation. It is provocative, but since it is a retrospective study from one center, we can't draw any conclusions."

Coopersmith医师，同时也是SCCM会议计画委员会副主席向Medscape表示，这项有关於接受脱离帮浦CABG手术病患的感染率较高的试验是引人注意的，这样试验结果产生了发炎角色的假说；这是刺激的，但是因为这是来自於单一中心的回顾性分析，因此我们无法下任何结论。

The subsynchronous oscillation characteristics of a synchronous machine connected to a static VAR compensator is studied with the complex torque coefficient method realized by time domain simulation, and some important conclusions are obtained which can guide the design and operation of SVCs to avoid SSO problem.

4基于时域仿真实现的复转矩系数法，对与静止无功补偿器SVC相联接的同步发电机组的次同步振荡特性进行了深入的研究，得出了一些重要结论，可为SVC的设计和运行提供避免SSO的依据。

Some basic properties of σ- LFSR over F4 are studied, such as nonlinearity, cycle structure distribution of state graph, the largest period and counting problem related. The conclusions are as follows:The coefficient ring of σ-LFSR is isomorphic to the matrix ring over F,. The cycle structure of σ- LFSR is consistent with that of the determinant of the corresponding polynomial matrix if and only if the feedback polynomial of - LFSR does not contain nontrivial factor over F2,. The counting formula of the number of σ- LFSR with inconsistent cycle structure is also showed in that part. The period of σ-LFSR with degree n is maximum if and only if the determinant of the corresponding polynomial matrix is the primitive polynomial with order 2n over F2,.

本文研究了有限域F_4上的σ-LFSR的一些基本性质，如非奇异性、状态图的圈结构的分布、最大圈的充要条件及相关的计数问题等，得到以下结论：σ-LFSR的系数环同构于F_2上的矩阵环；σ-LFSR的状态图的圈结构与对应的多项式矩阵的行列式的圈结构一致的充要条件为σ-LFSR的反馈多项式不含有非平凡的F_2上的因式，给出了圈结构不一致的σ-LFSR的计数公式； n次σ-LFSR周期达到最大，当且仅当对应多项式矩阵的行列式为F_2上的2n次本原多项式。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。