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- Among all the passive and active islanding detection method,the active frequency drift method is pretty attractive. 孤島檢測是光伏并網(wǎng)發(fā)電系統所必備的功能。
- The uncertainty of the Cs Atomic Frequency Standard System is evaluated as well as the result of measurement of a nanosecond universal counter. 對銫原子頻率標準裝置不確定度和納秒通用計數器測量結果的不確定度進(jìn)行評定。
- Frequency synthersizer is one of the important part of the passive small type Rb frequency standard. 頻率綜合器是被動(dòng)式小型銣原子頻標的關(guān)鍵部件之一。
- Indicated the good result of the long-term operation of the optically pumped cesium beam frequency standard in China. 強調了中國光抽運銫原子束頻標經(jīng)過(guò)長(cháng)期連續工作所取得的優(yōu)秀成果。
- Meanwhile, we take some improvement measure in order to improve the stability about rubidium atomic frequency standard. 同時(shí)通過(guò)定量分析對電路實(shí)現提出了一系列優(yōu)選方案，從而使銣原子頻標的性能得到改善。
- Recently, laser frequency standards have developed rapidly. 近年來(lái)，激光頻標得到了迅速發(fā)展。
- The impurity that was produc ed in aging process was analyzed.The results were benefit to the research of rubidium frequency standard. 對老化過(guò)程中產(chǎn)生的雜質(zhì)進(jìn)行了分析,從而對銣頻標研究提供參考依據。
- Analyses failures of XSR type of Rubidium atomic frequency standard used in our factory,and introduces the situation of particular overhaul in detail. 對我廠(chǎng)的頻率標準XSR型銣原子頻標發(fā)生的故障及具體檢修情況作了較詳細的分析和介紹。
- The short stability of the miniature Rubidium vapor cell frequency standard is measured to be superior to the same pattern products internaitional. 在小型化的條件下，整機短期頻率穩定度達到了國際同類(lèi)產(chǎn)品水平。
- The atomic hydrogen maser is the most stable frequency standard generally available today for all but the shortest measuring time interval. 氫脈澤是一種中、長(cháng)期穩定度最高的原子頻率標準。
- The hydrogen maser is the generally available frequency standard with the smallest frequency instability for all but the shortest measuring time interval. 為了提供高精密的時(shí)間頻率,人類(lèi)已經(jīng)研制出氫原子鐘,除長(cháng)期穩定度之外,它的各項性能都是十分優(yōu)秀的。
- Finally the waveform distortions of these springs are calculated, and the selection criteria of spring parameters in designing ultra-low frequency standard vibrator are provided. 最后計算了不同組合下彈簧的波形失真度，為設計超低頻標準振動(dòng)臺波形失真度最小的支承彈簧提供了選擇依據。
- The hydrogen maser isthe most stable frequency standard generally available today for all but the shortestmeasuring time.It's an important subsystem in VLBI. 氫脈澤是至今為止除極短時(shí)間測量間隔之外最穩定的頻率標準,它是甚長(cháng)基線(xiàn)干涉測量?jì)x(VLBI)中的一個(gè)關(guān)鍵設備。
- The Active Frequency Stabilization of CO_2 Laser 二氧化碳激光器的主動(dòng)穩頻
- The hydrogen maser is the most stable frequency standard generally available today for all but the shortest measuring time.It's an important subsystem in VLBI. 氫脈澤是至今為止除極短時(shí)間測量間隔之外最穩定的頻率標準，它是甚長(cháng)基線(xiàn)干涉測量?jì)x(VLBI)中的一個(gè)關(guān)鍵設備。
- A portable laser system, continually working for very long period, is the key part in realization of an optically pumped cesium beam frequency standard. 長(cháng)期連續工作的袖珍激光系統是實(shí)現實(shí)用的光抽運銫束頻標的關(guān)鍵。
- The orient has been playing an active role in the world economy. 亞洲一直在世界經(jīng)濟中發(fā)揮積極作用。
- He is an active member of the school's stamp club. 他是學(xué)校集郵俱樂(lè )部的一名活躍會(huì )員。
- An active volcano may explode at any time. 活火山隨時(shí)都有可能爆發(fā)。
- The preliminary result of the frequency stabilization of an InGaAsP semiconductor laser using the optogalvanic effect of a gas absorption cell is reported. The optogalvanic signal of the discharge absorption cell is used as a frequency standard. 采用光吸收作用使放電氣體吸收池電流改變，即“光電壓”信號作為頻率標準，對InGaAsP長(cháng)波長(cháng)半導體激光器進(jìn)行穩頻。
