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By sampling echo signal demodulated and A/D transform, sampling value is transmitted to SCM for compare, division, calculation, and exporting gain code to control signal range; furthermore controlling the AGC circuit, realizing amplification control to echo signal, consequently stabilitate the signal range in a window for the later circuit.

通过对检波后的回波信号进行采样，经过A/D变换，采样值送入单片机内部进行比较、判别、计算，然后输出可控制信号幅度的增益码去控制AGC电路的受控级，实现对回波信号的增益控制，从而使得输出信号幅值稳定在一个窗口内，供后续电路处理。

The inspiration, as it is for a lot of things we do, is other media -- lazy broadcasters and sports columnists who compare Dirk to Bird or Keith Van Horn to Bird or pretty much any other tallish white guy to Bird.

很多时候，我都认为这是因为人们努力不够，特别是这些媒体工作者们。

Objective: To compare the advantages between transcallosal transchoroidal approach and the transfrontal transchoroidal approach, and to provide microsurgical anatomy to neurosurgeons of how properly to treat the lesions involving the third ventricle via the transchoroidal approach.

目的：比较经胼胝体和经额中回两种途径达到脉络裂的优劣，为临床医师经脉络裂入路治疗第三脑室病变提供理论基础。

A maths model according to anatomic measure in Transorbital Roof Craniotomy were established to compare with transorbital keyhole approach to frontal base meningioma and pituitary adenoma. We discovered that removing 1cm orbital roof bone will increase the instrument handle angle from 360 to 450(25%).

本文通过经眉弓锁孔去眶顶入路对前颅凹底脑膜瘤垂体瘤的手术治疗，从解剖测量数据建立几何数学模型，与传统眉弓入路进行比较发现去除1cm的眶顶骨质，在理论上手术器械的操作角度从360增加到450即增加25％。

Objectives: The ongoing debate, surrounding the surgical treatment of trochanteric hip fractures, particularly unstable fractures, has led to continuous changes in the design of well-established implants and to the development of new ones. The goal of this paper was to use a finite element simulation to compare the bioniechanical behaviour of three implants most often used at the hospital of China: DHS.

目的 通过有限元法比较目前治疗股骨转子间骨折常用的三种内固定系统：DHS、DCS和Gamma钉的生物力学性能，评价三者治疗不稳定股骨转子间骨折的优劣，对临床选择内固定提出合理建议。

Abstract］ Objective To evaluate the distinctive clinical value of magnetic resonance urographyMRU）in the diagnosis of primary ureteral carcinoma.Methods To compare the accuracy of diagnosis of MRU with ultrasonography,urography,retrograde ureteropyelography and CT,diagnostic imaging and progress of ureteral carcinoma were analyzed in twenty-four cases from 2000 to 2006,twenty cases had MRU examinations.The original preoperative diagnostic reports of various imaging facilities were analyzed on account of the results of operation and pathology.

目的 探讨磁共振水成像技术在原发性输尿管肿瘤中的临床诊断价值方法分析2000～2006年24例原发性输尿管肿瘤的影像学诊断结果，并基于术中所见和病理报告，将磁共振水成像技术20例）与超声24例）、泌尿系造影24例）、逆行造影15例）、CT(19例）的确诊率相比较。

Due to the lack of enough photon counts, we are not able to make an X-ray spectroscopical imaging to deduce the radial distribution of the gravitating mass to compare with that of the optical virial mass.

与光学观测所作出的预计相反，这些数值显示SCGG 223是一个正常的低温星系群。

In order to compare the functions of main olfactory system of mammals and accessory olfactory system and to probe physiologic function of vomeronasal system of human beings in detail, it is necessary to study vomeronasal system further using new methods.

陕西师范大学生命科学学院；陕西师范大学生命科学学院；北京师范大学生命科学学院陕西西安710062北京师范大学生命科学学院；北京100875；陕西西安710062；北京100875

In order to calibrate the model, data of six typhoons such as the flood peak and the peak time are collected to compare with the result of the simulations. The result shows that the difference of the inflow hydrograph between them is very close. The average error of the flood peak is 5.21%. Furthermore, the error of the peak time is less than one hour but Wenny Typhoon is an exception by more than two hours. Therefore, the model could be applied to simulate the rainfall event at Shih-men watershed.

为验设模式模拟精确性，本研究以具代表性之六场台风降雨模拟，针对石门水库入流历线之观测流量与模拟值比较，结果显示模拟之水库入流历线与观测值差异不大，其尖峰流量误差绝对个平均为5.21%；另在预测洪峰到达时间方面，除温妮台风迟迟2小时外，其余均在1小时内，显示本分析模式可应用於石门水库上游集水区暴雨事件模拟。

As the environment gets worse and worse,humen begun to realize that the wolves were so wise,beacuse the wolves didn't kill out their hunt in order to hold the balance of nature.even we can compare the wolve to the cleaner in nature.

在环境恶化后，人类才意识到狼有多么聪明，因为他们不会对猎物赶尽杀绝，以维持生态的平衡。甚至我们可以称其为自然界的清道夫。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。