频率

In this set of experiments, the cells were subjected to sinusoidally pulsing electromagnetic fields for three different frequencies (2HZ、15HZ、50HZ) and one intensity (5～ 8GS). It showed that they enhanced osteoblasts proliferative activity, especially in the group of 2HZ.

通过观察频率分别为2HZ、15HZ、50HZ的正弦波脉冲电磁场对成骨细胞的作用，结果显示三种频率的正弦波电磁场均能促进成骨细胞的增殖，其中以频率为2HZ者作用最明显。

The research indicates that the method of controllable heat saving load and adjustable capacitor has the advantage of simple structure and fewer investment, it can stable the frequence and voltage better. The method, aiming to maintain the frequence, is more better. It can stabilify the frequence as well as less excursion of the voltage in the same time.

研究表明，可控热负荷加可调电容的方式结构简单、投资较少，可较好地稳定频率与电压，采用以频率为控制目标的控制效果较佳，既能很好稳定频率，又不使电压偏移太远。

There were no significant differences for the firing rates in the site of contralateral TNC neurons among during pre-CSD,CSD,and post-CSD (P＞0.05).For flunarizine group,the firing rates in the site of ipsilateral TNC neurons during pre-CSD were higher as compared with during CSD(P＜0.05).2.1 There were statistical differences on palasma levels of CGRP and SP among the three groups(P＜0.05).The levels of CGRP and SP in CSD group were higher than control group(P＜0.05).No significant differences on the levels of CGRP and SP in ipsilateral trigeminal ganglia were found among the three groups(P＞0.05).2 The number of neurons with positive CGRP and SP immunoreactivity was statistically different in right-sided trigeminal ganglia among the three groups (P＜0.05).The number in fight-sided trigeminal ganglia in CSD group was higher as compared with control group(P＜0.05).The number in right-sided trigeminal ganglia was statistically higher than that in left-sided trigeminal ganglion in CSD group(P＜0.05).3.1 Altered ReHo in ipsilateral pons and other brain regions response to pain such as basal nuclei,thalamus,cingulated gyms and prefrontal cortex was detected during the acute spontaneous attack as compared with during headache remission(P＜0.05,corrected by Monte Carlo simulation). 2 Positive functional connectivity was detected between ipsilateral pons and other brain regions related to pain within pain state and within non-pain state (P＜0.05,corrected by false discovery rate,FDR).Increased functional correlation between ipsilateral pons and other pain-related brain regions such as ipsilateral prefrontal cortex and contralateral subcallosal gyrus was detected during the acute spontaneous attack as compared with during headache remission(P＜0.05,corrected by Monte Carlo simulation).

结果1。对照组未发现CSD；同侧TNC放电频率，CSD中＞CSD后＞CSD前P＜0.05对侧TNC放电频率，CSD前、中、后无统计学差异(P＞0.05氟桂利嗪组同侧TNC放电频率，CSD前＞CSD中(P＜0.05)，CSD前与CSD后及CSD中与CSD后之间无统计学差异(P＞0.05)。2.1关于放免测定，各组血浆CGRP、SP水平有统计学差异(P＜0.05)，CSD组高于对照组(P＜0.05)，CSD组与氟桂利嗪组、对照组与氟桂利嗪组之间均无统计学差异P＞0.05各组之间同侧三叉神经节中CGRP、SP水平未见变化(P＞0.05.2关于免疫组化研究，右侧三叉神经节CGRP、SP免疫阳性细胞数三组之间有统计学差异(P＜0.05)，多重两两比较结果CSD组大于对照组(P＜0.05)，CSD组与氟桂利嗪组之间、对照组与氟桂利嗪组之间无统计学差异P＞0.05左侧三叉神经节CGRP、SP免疫阳性细胞数三组之间无统计学差异(P＞0.05CSD组中右侧三叉神经节CGRP、SP免疫反应阳性细胞数大于左侧(P＜0.05)。3.1局部一致性分析发现两组患者头痛疼痛状态较非疼痛状态脑活动发生变化的脑区有同侧脑桥以及其他疼痛相关脑区如基底节区、丘脑、扣带回、前额叶皮层等(P＜0.05，蒙特卡罗模拟校正)。2功能连接分析发现疼痛状态与非疼痛状态下主要疼痛相关脑区均与同侧脑桥有功能联系P＜0.05，false discovery rate，FDR校正疼痛状态与非疼痛状态比较，同侧前额叶皮层、对侧胼胝下回等疼痛相关脑区与同侧脑桥之间功能联系增强(P＜0.05，蒙特卡罗模拟校正。

Thist paper chooses 90 groups of "Tong_su_yi_xu synonymic words" from "Modern Chinese dictionary ", and divides them into three kinds according to the interpretation method in the dictionary, regards web page of Sohu website as the platform, us.es the search engine to carry on the search of the word , count the frequency that every group"s word appears , and rejects artificially the mistakes appearing in all web pages that can be opened, language fact presented in observation post then carefully (namely the example sentence with this word appearing in the webpage), and find that the 90 groups of "Tong_su__yi_xu synonymic words" except that the meaning of a word is the same, have quite a few of at frequency of utilization and concrete usage for difference: Because people"s use habit and word use the difference on to cause the appearance frequency of the word analogous to or with a wide gap, because of word-building ability, the word collocates, the word overlaps or the language usually overlaps, linguistic context of area and times , the meaning of a word that the word appears are abstract and concrete, semanteme is laid particular emphasis on, the morphological feature-change, etc.

本文从《现代汉语词典》中选取90组同素异序同义词，按词典中的释义方法将其分成三类，以搜狐网站的网页为平台，运用搜索引擎进行词语的搜索，统计下每组词语出现的频率，并将所有能打开的网页中出现的错误进行人工干预，然后仔细观察所出现的语言事实(即网页中出现的含有该词语的例句)，发现这90组同素异序同义词除了词义相同之外，有相当一部分在使用频率和具体的用法上还存在着差别：由于人们的使用习惯和词语使用上的差异造成词语的出现频率相当或者相差悬殊，又因为构词能力、词语搭配、词语重叠或语素重叠、词语出现的区域和年代语境、词义抽象与具体、语义侧重、词性变化等方面的差异造成词语使用上的区别。

Furthermore, the author analyses some common problems in using the fre-quency synthetizer and presents its solution.

接收频率合成器原理分析 1。锁相环的构成及原理 SAR接收频率合成器应用了先进的频率合成技术，其核心

The calculated free vibration frequencies and mode shapes of the whole structural model compare well with measured values. The influences of the various supporting conditions upon the frequencies of the trashrack and the free vibration characteristics of the single rack bars were then studied.

对栅架整体结构模型的自振频率和振型进行了量测，并与数值计算结果作了对比，二者基本吻合，说明成果是可靠的；此外，还对栅架支承条件对拦污栅自振频率的影响以及单根栅条的自振频率特性进行了探讨。

The purpose of this paper is the analysis、computation and dynamic equivalence of power system frequency dynamics as well as the designation and implementation of underfrequency load shedding scheme. Some important conclusions have been reached based on detail theoretical analyses and a large amount of calculation results.

本文采用理论分析和详细时域仿真相结合的方法研究了复杂扩展式多机电力系统中功率—频率动态过程的主要特点，讨论了频率动态过程的计算方法，解决了频率过程计算中的动态等值问题，同时对电力系统低频减载方案的设计和实施问题进行了深入的探讨。

In this paper,The necessity of frequency tracking in ultrasonic cleaning equipmens is discussed.Based on a introduction on the principle of the mian circuit of the ultrasonic power supply for cleaning equipmens and the principle of PLL ,the output frequency of 74HC4046 is changed by a singlechip measuring the phase difference between volage and current.

本文讨论了超声波清洗机中自动频率跟踪的必要性，在介绍超声波清洗机的主电路原理、PLL锁相环原理的基础上，利用单片机检测超声电源负载的电流、电压的相位差，来改变74HC4046 的输出频率，完成了变步长频率跟踪软件设计。

In this paper,the necessity of frequency tracking in ultrasonic cleaning equipmens is discussed.Based on introduction on the principle of the mian circuit of the ultrasonic power supply for cleaning equipmens and the principle of PLL,the output frequency of 74HC4046 is changed by a single chip measuring the phase difference between volage and current.The software of adaptive tracking technique with varied frequency steps is completed.

讨论了超声波清洗机中自动频率跟踪的必要性，在介绍超声波清洗机的主电路原理、PLL锁相环原理的基础上，利用单片机检测超声电源负载的电流、电压的相位差，从而改变74HC4046 的输出频率，完成了变步长频率跟踪软件设计。

That X series refresh we've been waiting on from Lenovo seems to have become imminent as the company's website has published the latest version of its maintenance manual, which now includes the models X201, X201s, X201i and X201si. The X201 will come with Intel CPU options ranging all the way up to the 2.66GHz Core i7-620M -- a true powerhouse with 4MB of cache that is already available on T410 and T510 models -- while the slimmer X201s will plump for the lower-volted Core i7-640LM, clocked at a reputable 2.13GHz but also consuming 10W less power than its chunkier sibling. The X201i and X201si will likely prop up the pseudo-affordable part of Lenovo's range with Core i3-330M parts.

如果说，ThinkPad Edge让你不知所措，那么联想官方网站透露出来的维修手册内容可能会让你稍微感觉好点，根据信息来源，我们将会看到X201， X201s， X201i以及 X201si， X201 系列笔记本将配置 Intel 处理器，顶配可以看到2.66GHz Core i7-620M（基于Arrandale双核心，集成45nm图形核心，2.66GHz频率，显示核心频率在500MHz，支持DDR3 1066，有4MB缓存和35W TDP），就是T410 和T510 型号上已经配置的；X201s则采用的是 Core i7-640LM处理器，频率有所降低到 2.13GHz，不过功耗可以少10W；X201i 和 X201si则采用的是 Core i3-330M 处理器，触摸板现在是可选配置，不知道你是否满意这个升级？

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐