selective protection 中文意思是什麼

selective protection 解釋
選擇保護
  • selective : adj. 1. 選擇的；挑選的；有選擇性的；淘汰的。2. 【無線電】選擇性的。adv. -ly
  • protection : n 1 保護，保衛，防禦，掩護，包庇，照顧 （from; against）。2 保護者，防護物 （against）; 〈美俚〉...
  1. Study of principle of selective leakage protection of zero sequence dc of low - voltage power network underground and its implementation

    礦井低壓電網零序直流選擇性漏電保護原理的研究及實現
  2. The safety of transmission line plays a important role in power system safety it is not only the requirement of ensure supply power reliability, but also the necessary precondition of enhance power system stabilization, to remove faulty line quickly and accurately, also keep non - faulty line continuous work when some transmission line faults current differential protection is a kind of simple, reliable and good - selective protection manner to any variety of transmission lines, power system development needs current differential protection apply to transmission lines, moreover the advancement of electric and communication technology enable current differential protection apply to transmission lines firstly, the paper discusses, analyses the research and application transmission line protection in detail, compare the principle and realistic presupposition of general line pilot protections secondly, because conventional current vector differential protection are influenced easily by load current and transitional resistance, in order to at the same time quicken protection act, the principle and criterion include work characteristic of differential protect based on fault component sampled values are studied, results shows that differential protect based on fault component sampled values excels general vector current differential protection in reliability, sensitivity and anti - saturation of current transformer in addition, synchronous current sampling methods at all terminals of line is analyzed and estimated lastly, the principle and criterion. also device design about current sampling values differential protection based on optical fiber communication, which apply to short transmission lines are concretely investigated,

    基於基爾霍夫定律的電流差動保護無論對於何種形式的輸電線路都是一種簡單、可靠、選擇性強的保護形式，電力系統的發展使得電流差動保護應用於線路保護成為需要，而電子、通信技術的發展使得電流差動保護應用於輸電線路成為可能。首先，本文對目前線路保護的研究和實際應用情況進行了討論和分析，比較了常用線路縱聯保護的實現原理和實現條件及優缺點。其次，針對常規相量電流差動保護易受正常負荷電流和故障過渡電阻影響的缺點，同時為加快差動保護的動作速度，對基於故障分量瞬時采樣值電流差動保護的原理、判據、動作特性等作了討論和分析，結果表明基於故障分量瞬時采樣值電流差動保護在可靠性、靈敏度、抗電流互感器飽和方面明顯優于常規相量電流差動保護，對電流差動保護各端的同步采樣方法和數據通信也進行了分析和評價。
  3. The approach combines hop - by - hop selective backpressure scheme with hol protection to eliminate congestion and improve performance of switched ethernet l2 domains instead of random early drop ( red ) scheme or its variants considering the characteristics of ethernet technique

    基於ieee802 . 1p和802 . 1q的隊列機制，採用逐跳選擇式背壓流控機制和頭端阻塞保護機制消除擁塞，改善系統性能。
  4. Selective leakage protection device kxl - i

    型礦用選擇性漏電保護裝置
  5. Activated carbon is of large surface area and stong absorbility. it can be used for desulfurizaion, debenzolization. deodorization and decolourization, it can also be used in selective absorption and elimination of some chemical or mechanical impurities in liquid or gas phase in the field of chemical, oil and gas, metallurgical, water treatment and environmental protection industries, as well as the dalily life

    活性炭是一種多孔性物質，它比表面大、吸附性強，能脫硫、脫苯、脫臭、脫色，還能選擇性地脫除液相或氣相中某些化學雜質，可廣泛應用於化工、石油、天然氣、冶金、原子能、水處理、食品、紡織、醫藥、城建及環保等工業過程和人類生活中。
  6. Activated carbon is of large surface area and stong absorbility. it can be used for desulfurization, debenzolization. deodorazation and decolourization, it can also be used in selective absorption and elimination of some chemical or mechanical impurities in liquid or gas phase in the feld of chemical, oil and gas, metallurgical, water treatment and environmental protection industries, as well as the daily life

    活性炭是一種多孔性物質，它比表面積大、吸附性強、能脫硫、脫苯、脫臭、脫色還能選擇性地脫除液相或氣相中某些化學雜質、可廣泛應用於化工、石油、天然氣、冶金、原子能、水處理、食品、紡織、醫藥、城建及環保等工業等工業過程和人類生活中。
  7. The circuit breaker protection with a variety of intelligent function, selective protection, precise movements, we can avoid unnecessary power outages and improve reliability

    該斷路器具有多種智能保護功能，可進行選擇性保護動作精確，可避免不必要的停電，提高供電可靠性。
  8. According to the present actual underground power system which neutral point is grounded through arc suppression coil in many supper big shaft, the development history and present situation of synthetic protection system used in hv flameproof switchgear are reviewed, and on the basis of analyzing the problems existed in high voltage flameproof switchgear, the selective leakage protective method based on the detecting harmonic direction of zero sequence current as well as the value of zero sequence voltage is proposed in this paper, and at the same time, harmonics extracting schematic and transforming circuit are also designed

    本文深入系統地研究了基於intel80c196kb單片機控制的6kv防爆開關綜合保護系統，主要內容如下：針對大型及特大型礦井供電系統中性點普遍採用消弧線圈接地方式的現狀，回顧了國內外礦用高壓防爆開關保護系統的發展歷史，分析了目前國內高壓饋電開關保護系統所存在的問題，提出了「基於零序電壓基波啟動，五次諧波功率方向比較」的選擇性漏電保護原理，設計了相應的五次諧波提取電路和功率方向鑒別電路。
  9. In order to satisfy the requirements of the selective protection to the power network and to increase the production competition, it has important applications to design the intelligent controller that has intellectual function and reasonable price

    為了滿足電網選擇性保護的需要，適應市場需求及提高產品競爭力，設計出保護功能完善、價格合理的智能控制器具有重要的應用價值。
  10. This simple, single transport solution lacks the following : end to end protection, non - repudiation, selective protection securing a subset of the message, a robust and flexible authentication mechanism, and provision for message level or end to end secure context

    這個簡單的、單一的傳輸解決方案缺少下列特徵：端到端的保護、不可抵賴性、選擇性保護（保護消息的一部分） 、健壯且靈活的認證機制以及消息級（或稱端到端）安全上下文的供應。
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