frequency change 中文意思是什麼
frequency change
解釋
頻率變化-
Mems ( micro electromechanical system ) has become one of the most rapidly development technologies. along with the rapid development of mems techniques, capacitive sensor is used widely whose capacitance changes small, which has put forward the new request to the measurement technique. the common measure for capacitance measurement is that convert capacitance to voltage, electric current or frequency. the area of polar plate of the capacitor becomes smaller and smaller, and the total capacitance of micro capacitive sensor is usually several pico farad only. as a result, its change amount is smaller
Mems （ microelectromechanicalsystem ）近年來發展最快的技術之一，隨著mems技術的快速發展，電容式加速度計的電容變化變化量越來越小，對檢測技術提出了新的要求。在電容式傳感器中，常用電容檢測電路是將其轉換為電壓、電流或者頻率信號。目前的微型電容傳感器的極板面積變得越來越小，電容總量只有幾個pf ，變化量就更小。 -
Power supply, communication power supply, and purify power supply, broadcast television shoot equip, exchange frequency power supply, contradictorily change power
穩壓電源開關電源通訊電源，凈化電源廣播電視發射裝置交頻電源逆 -
In the next place, by studying the change of the resonant frequency of the whole system, this paper designs the circuit to track the resonant frequency of the system by cd4046 mainly. at the same time, in order to improve the efficiency and get better dynamic capability of the converter, we choose pll and fuzzy control after comparing the pll circuit, fuzzy circuit and pll ? fuzzy control circuit. in the end, this paper brings forward the control blue print to realize the drive control circuit of the high frequency converter, using the dsp chip as the key part to realize four routes of pwm drive pulses with dead band of the control system
其次，通過對整個系統諧振頻率變化的分析和研究，設計了以鎖相環cd4046為核心的鎖相環控制電路，同時，在綜合比較鎖相環控制、模糊控制以及模糊控制和鎖相環復合控制三種控制演算法的基礎上，進行了系統模擬，得出採用復合控制可使跟蹤電路既具有鎖相環路較好的穩態性能，又擁有模糊控制較好的動態性能，系統魯棒性能好，同時也提高了逆變器的效率。 -
This paper supplied a new way through variable frequency variable speed ( vfvs ) to change its output flow rate and adding a constant - pressure - drop valve, which could solve the defects in hydraulic pressure servo control system, such as low efficiency in control system, short life, poor ability in resisting pollution, low efficiency in driving system and flow rate, pressure pulse. and this way was proved to be effective
本論文針對傳統伺服控制系統效率不高、元件壽命短、抗污染能力差、驅動系統效率低、存在流量及壓力脈動等缺陷，利用先進的交流變頻調速技術改變液壓泵轉速的容積調速新方法，提出了在液壓系統中加一個定差減壓閥的新思路，較好地解決了液壓伺服系統存在的上述問題。 -
The faculae arise with change of the cutoff frequency when the wave - guide transforms from symmetry to asymmetry. for each pattern rank of the planar wave - guide, the light with the cutoff frequency change will be leaked out and captured by the ccd camera
對存在於對稱平面波導中的各個模次的光，將有的光被泄漏，而ccd所攝到的則是其中被反射的一部分。 -
In the sub block circuit design, the contents that the author had introduced include : the principle of band gap voltage reference and the design technique in low power supply ; the analysis of spike pulse noise rejection, frequency divider and dead time in oscillator and control circuit ; the selection of the width and length ratio of four switches and 2x / 1x mode change point in driver and mode selection circuits
在子電路設計中，作者比較深入分析的內容有:基準電路的原理及低電源電壓下基準電路的設計;振蕩器和控制電路中尖峰脈沖噪聲抑制、兩分頻電路及死區時間設定;驅動及模式選擇電路中開關管的寬長比的選擇及模式轉換點的設計。 -
As a rule, the immunosensors is to coat the surface of crystal with antibodies or antigens, immerge to muster solution, binding to the immobilized antigens or antibodies and take place immuno - reaction, can cause a frequency change of the quartz crystal, and the frequency changes are proportional to content of antigens or antibodies in muster solution
通常將抗體（或抗原）固定於晶體表面，浸入樣液時，與抗原（或抗體）產生免疫反應，使晶體表面質量負載增加，頻率降低，其頻移值與樣液中抗原（或抗體）含量成正比。 -
Equation(4－198)yields a first approximation for the change in the natural frequency of vibration.
方程（4198）給出了一級近似下的固有振動頻率的改變量。 -
Any subtle change of capacitance can be measured through the method of modulation on high - frequency harmonic oscillation return circuit
電容的微小變化可通過對高頻諧振迴路調制的方法進行測量。 -
6 type products whether one have whorl, card lock connection device of organization, it apply to post and telecommunications communication equipment, figure buy the line device extensively, the radio instrument waits until joining the coaxial cable of the radio frequency to use in the radio frequency return circuit, and can change each other with the products that iec60169 - 13 stipulate
型產品是一種具有螺紋、卡鎖機構的連接器，它廣泛應用於郵電通信設備、數字配線裝置，無線電儀器等射頻迴路中連接射頻同軸電纜用，並能與iec60169 - 13規定的產品相互換。 -
Venation wave spectrum analysis finds out shape - structure change of mid - frequency signal fluctuation
脈絡波譜圖分析查明了中范圍（頻率）信號波動的形態結構變化。 -
Methods of structural damage detection based on frequency change
基於頻率變化的結構損傷識別方法 -
Design of frequency change air - conditioner temperature adjuster based on fuzzy control principle
基於模糊控制原理的變頻空調溫度調節器的設計 -
It was proved that frequency change square ratio was a parameter for damage location and damage degree in a structure
結果表明，結構頻率的平方變化比是損傷位置和損傷程度的函數。 -
Since iron hearts of a very similar role to iron core magnetic - fluid changes will enable the inductance with the electrical frequency change, and therefore affect the dynamics of the electrical performance
5 .由於爪極鐵心中的渦流作用引起鐵心磁導的變化，也就使電機的電感隨頻率而變化，因此影響電機的動態性能。 -
Because damage and reinforcement change the mass and stiffness of building, they will change frequency. so, what is the regularity of this change and how to apply the regularity in practical work are a problem deserving of public attention. in this paper. regarding the typical steel industry building as the object. applying the dynamic stiffness method to make simulation analysis, the author firstly gets the regularity of frequency change
如何在工程實際中主動應用這些規律?都是值得研究的問題。本文以典型的鋼結構單層廠房為研究對象，應用動力剛度法進行計算機模擬，系統研究損傷和加固對結構基本頻率的影響，探索出一些規律；並用貢獻理論解釋了這些規律。 -
China is one of the countries which are harmed by storm surge both tropical and temperate cyclones, the disaster of storm surge can occure every seasons and from south to north in china ' s coastal area. based on the analysis of the features of temporal and spatial changes of storm surge disaster in the recent 50 years, this paper focuses on the frequency changes of historical records in recent 500 years and measured data in recent 50 years of storm surge disaster and the relationships between storm frequency change and climate fluctuation. meanwhlie, the effects of future increase in the frequency of tropical cyclones landing or affecting china and relative sea level rise with global warming on storm surge disaster of china ' s coastal area also discussed. the results show that, in recent 500 years, there are direct relationships between storm frequency change and climate fluctuation, i. e., high global mean temperature correspond with high storm frequency and low mean temperature correspond with low storm frequency. storm surge disaster in china ' s coastal area will be exacerbated with global warming
中國是全球少數幾個同時受臺風風暴潮和溫帶風暴潮危害的國家之一，風暴潮災一年四季，從南到北均可發生.本文基於中國沿海近50年風暴潮災時間變化和空間分佈特點的分析，著重探討了近500年全國及長江、黃河、珠江三角洲的歷史記錄和近50年實測風暴潮災發生頻次的變化及其與氣候波動的關系，並對未來全球變化背景下，中國沿海風暴潮災的變化趨向進行了討論.結果表明:近500年來，中國沿海的風暴潮災在氣溫較高的偏暖時段比氣溫較低的偏冷時段明顯增多.近50年實測臺風暴潮災的變化也是如此，而溫帶風暴湖的變化則與此相反.未來全球變化引起的登陸影響中國的熱帶氣旋頻次增加和相對海平面的上升，均將導致風暴潮災呈加重的趨向 -
It is comprised of a sensor head ( a quadrangular pyramid tip, a base, four quartz crystal plates ) and a network analyzer and an apparatus to apply three - axis force. according to mechanics, four plates of the quadrangular pyramid tip correspondingly receive four one - dimension forces when applying a three - axis force to the sensor head. because quartz crystal has a force - frequency effect, namely, resonance frequency change of the quartz crystal is in direct proportion to one - dimension forces applying to it, four certain resonance frequency changes of the four quartz crystal plates are corresponding to a three - axis force
當傳感頭受三軸力作用時，根據力學的分析可以確定三軸力與四角錐體四個面上單向力之間的對應關系，用分別貼在四角錐體四個面上的四片壓電石英晶體作為壓敏元件，由於石英晶體的力頻效應（即石英晶體在受到應力作用時，它的諧振頻率與應力大小成正比） ，從而最終確定了四片石英晶體的諧振頻率改變量與傳感頭上所受三軸力大小和方向之間的對應關系。 -
Abstract : a fast drag system is designed to simulate the law of speedvariations of a certain power system engine in the process of its start by means of electric power drag and the theory of automatic control and through adopting a new type of electric machine and frequency - change techniques, thus enabling the system to achieve quick start, instantaneous breakdown and accurate following of the electric machines speed variations curve set in advance at will
文摘:運用電力拖動與自控理論，採用新型電機及變頻技術，設計一種快速拖動系統藉以模擬某動力系統發動機啟動過程轉速變化的規律，使該系統能夠達到快速啟動，瞬間制動，精確跟隨事先設定的電機轉速變化曲線的目的。 -
Structures. frequency change square ratio is applied as a parameter to locate corrosion and cracking damage. a chart, which relates the loss in stiffness with changes in natural frequencies, is proposed to identify the degree of corrosion and cracking damage
根據結構銹裂損傷前後的頻率平方變化比進行銹裂損傷定位；根據結構銹裂損傷后頻率降低與剛度降低的關系，繪制結構銹裂損傷程度識別圖，用於銹裂損傷程度識別。
分享友人