高频

This is determined not by the fundamental physics of tunnelling, but by the limited high-frequency response of the conventional tunnel current read-out circuitry.

这个分辨率不是由隧道作用的基本物理决定的，而是由传统隧道电流读出电路有限的高频响应决定的。

We recorded wave shapes that were different to those describedin previous studies, which may be related to the more localized recording area of theconcentric needle electrode used in this study.

我们应用高频硬膜外电刺激时并未诱发下肢节律性的运动，这可能是因为我们难以给予实验中的麻醉大鼠一定的下肢感觉反馈所致；这提示我们记录清醒大鼠的EMG信号是十分必要的。

Our factory is established in 2004, the existing staff 80 people,workshop area 2000M2, has the production assembly line 3 and thespectrometer, the oscilloscope, the high frequency signal generator ,leaks the reflectoscope reflector, the pressure resistance

我们厂成立于2004年，现有员工80余人，厂房面积2000M2，拥有生产流水线3条及频谱仪、示波器、高频信号发生器、漏电测试仪、耐压测试仪、溢流焊机、LED灯具模拟测试仪等生产、检测设备。

Check the maintenance indicator and the HF remote control unit and carry out the procedure to reinitialize the windows.

检查保养指示灯和高频遥控单元，并执行车窗玻璃初始化。

By employing such a method, 5 series of elastomers, including natural rubbers, elastomeric polyester fibers and ethylene-octene, ethylene-methyl acrylate as well as SIS triblock copolymers, were investigated with the purpose of studying elongation induced phase structure and mobility changes of the samples. For NR samples, it was demonstrated that there exists a small amount of crystals at RT even for unelongated samples. For both NR and the soft segment of PEE, with the increase of elongation ratio, the elongation-induced crystallinity increases almost linearly in a certain region of R, in accord with the increase of the lamellar thickness of the crystals; The behavior of ethylene copolymers, in terms of elongation induced morphorpholgy changes, are quite different from NR and PEE. The crystals are found to be gradually destroyed with the increase of R, with accord with the decrease of the lamellar thickness; The motional behavior of the soft segment of SIS, changes from "liquid" to "solid", in terms of 13C NMR spin-lattice relaxation.For many of the aformented samples, the dependence of 13C spin-lattice relaxtion time T1 on R are different for different groups, indicating that the changes of mobility at MHz frequency region with elongation are different for different groups.

通过对天然橡胶、聚醚酯嵌段共聚物、乙烯-辛烯共聚物、乙烯-丙烯酸甲酯共聚物、SIS等高分子弹性体样品聚集态结构和分子运动的研究，获得了一些新的实验结果，如：给出了确切的实验证据，证明了室温下未拉伸的天然橡胶样品中存在着微量的结晶；发现随着拉伸比增加，天然橡胶及聚醚酯样品的软段部分会出现拉伸诱导的结晶，且结晶度在一定范围内呈现近似线性的增加，所形成晶片的厚度也随之逐渐增加；而乙烯共聚物随着拉伸比的增加，原有的结晶会被逐渐破坏，晶片厚度逐渐变薄，结晶中的缺陷逐渐增加；随着拉伸比的增加，SIS中PI软段部分的核磁共振弛豫行为会出现从液态到固态的转变等；在对上述多个体系的研究中，还发现不同基团的自旋-晶格弛豫时间随着拉伸比呈现不同的变化趋势，表明不同基团的高频运动随拉伸比增加有不同的变化规律。

A new switching scheme to the gain of variable structure control signals is proposed. The following important open problems in standard VS-MRAC and MRAC are solved by using the scheme: 1 . a prespecified transient and steady-state performance index for tracking error can be achieved without requiring any information about the plant high frequency gain sign when relative degree of modelled part of plant is one, and 2 . it is shown that as long as the performance indexes are guaranteed for the auxiliary errors, each of which in dynamics is a sub-system with relative degree one, the tracing error will converge to a small residual set in a prespecified transient time when relative degree of modelled part of plant is greater than one.

提出了一种控制增益可切换的变结构自适应律，解决了如下变结构模型参考自适应控制（包括基于调参律的模型参考自适应控制）理论研究中长期没有解决的问题：当对象建模部分相对阶为1、高频增益符号未知且存在非线性输入扰动和未建模动态等情况下，系统跟踪误差可满足预先给定的动态和稳态性能指标；当对象建模部分相对阶大于1且存在非线性输入扰动和未建模动态时，可保证系统跟踪误差在预先给定的过渡过程时间内收敛到一个残差集中； 5。

Different materials influencing the high frequency resonant character of sensor and the match between sensor and communication system are made.

本文研究了几何尺寸对传感器性能的影响，和在不同支撑材料下传感器的高频谐振特性，这些研究有利于传感器的改进工作。

The normal frequency ventilation of high frequency jet respirometer can improve the gas exchange in the lungs.

目的：高频喷射呼吸机常频通气的应用，可进一步改善肺内气体交换，本研究评价常频通气对呼吸衰竭动脉血气的影响。

High frequency jet respirometer ; normal frequency ventilation ; breath failure

高频喷射呼吸机；常频通气；呼吸衰竭

The higher technical requirements of the FMS are proposed with the raise of the performance of flight vehicles. It is the main aspects of developing of FMS to raise the frequency respondency, accuracy, robustness, and reliability, from the view of the development tendency for the flight control system simulation in the world.

随着飞行器的性能的提高，对飞行转台系统也提出了许多更高的技术要求，从国内外发展趋势来看，"高频响、高精度、高鲁棒性、高可靠性"是伺服转台系统主要性能指标和发展方向。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！