零信號區 的英文怎麼說
中文拼音 [língxìnháoqū]
零信號區
英文
null area-
It includes four criterions of locating fault point ? “ transient zero sequence current amplitude law ”, “ stable base wave zero sequence current phase law ”, “ stable seventh harmonic zero sequence current phase law ” and “ s injection law ”. pointing out how the law locate the fault point to minimal fault section by applying these criterions gradually. the law will not only make up the blemishes existing in current methods for single - phase fault location in small current grounding system, but also locate the fault point to minimal fault isolating unit on fault line
該方法通過將所包含的四個定位判據- 「暫態零序電流幅值法」 、 「穩態基波零序電流方向法」 、 「穩態7次諧波零序電流方向法」和「 s信號注入法」 -進行有選擇地遞進使用，不僅有效彌補了目前已有小電流接地系統單相接地故障選線的缺陷，更將故障定位在故障線路最小故障區段。The microprocessor is used to realize digital control as flip plus of the scr. the ic chip sa866ae of mitel company is utilized as the low frequency signal generator of the system. furthermore in the zero - current detection circuit, use the photocoupler gaalas ired and photo ic to detect zero - current, furthest shorten the commutating " died region ", prevent the current from distorting
設計中採用單片機控制可控硅的觸發脈沖，實現數字化控制，並利用mitel公司的三相pwm交流電機脈寬調制晶元sa866ae ，成功研製了交-交頻器中的低頻信號發生器裝置，效果良好；此外利用用光電檢測元件進行系統零電流的檢測，盡可能地縮短換相死區，防止電流發生畸變，成功地解決了原有低頻電源系統中存在的兩大難題。Finally, the effectiveness of the proposed method is verified through theoretical and numerical results for systems with both unknown time - invariant and time - varying parameters
理論分析與模擬結果表明，跟蹤誤差信號在一預先指定區間上收斂到零，在起始區間段上被囿於死區所確定的區域中；並保證閉環系統中所有信號是有界的。Applications should be made by letter, giving details of personal particulars, education, present and previous employment and substantive salary as at 1 november 2005 together with a completed form gf340 ( rev 12004 ) which is obtainable from any public enquiry service centre of district office, home affairs department, or any job centre of the employment services division, labour department
申請人須以書信形式詳列個人資料、學歷、目前及以往的就業詳情及於二零零五年十一月一日的實職薪金，並連同填妥的通用表格第gf340號（ rev . 12004 ）提出申請。表格可向民政事務總署各區民政事務處諮詢服務中心或勞工處就業科各就業中心索取，亦可從公務員事務局網頁（ http : www分享友人