短路區 的英文怎麼說
中文拼音 [duǎnlùqū]
短路區
英文
shorting region-
The factors limiting the frequency band of the wide - band amplifier are introduced. through analyzing the effects of the intrinsic parameters and parasitical on the frequency characteristics, a method of improving fr of mosfet by using short channel device and making mosfet work at the saturation region through raising vgs is put forward ; the effects of different kinds of circuit configurations on the frequency characteristics and the junction voltage on the voltage pattern circuit, current pattern circuit and frequency characteristics are analyzed. according to the linear theory of transconductance which is applied in the bit circuit, the current pattern amplifier circuit, current transfer circuit and output circuit which consist of mosfet and the wide - band amplifier composed of them are put forward
介紹了限制寬帶放大器頻帶寬度的因素，通過分析mosfet的本徵參數、寄生參數對頻率特性的影響，提出了採用短溝器件、使mosfet工作在飽和區、抬高柵源電壓等提高mosfet特徵頻率的方法；分析了不同電路組態對放大器頻率特性的影響、節點電壓對電壓模電路、電流模電路頻率特性的不同影響，根據應用於雙極晶體管電路的跨導線性原理，提出了採用mosfet構成的電流模放大電路、電流傳輸電路、輸出電路以及由它們所組成的寬帶放大器，獲得了良好的頻率響應。Accordingly, using graph theory and operating experience abroad for reference, it firstly brings forward a new method of voltage rectification which based on pilot bus with voltage control area in view of the weak coupling among every vca ( voltage control area ), using decomposing method of multi critical value, it realizes the eliminating vinculum of every vca. and then, the rectification starts by pilot bus voltage of every vca. so the resolution of whole power net is diverted into calculating smaller sub - net
由於各個電壓控制區之間無功電壓的弱耦合性，利用多閥值分解的分區演算法，實現區域間的解耦，然後根據各個子網路的主導節點的電壓進行校正，從而把求解整個網路的問題轉化為求解各個小的子網路，降低了網路維數，減少了無功設備控制動作次數，提高了校正成功率，縮短了計算時間。The mutual inductor of electric current and voltage mutual inductor play an important role in relay protection. prevent from ct differential to protect and miss movement an important subject that the generatrix is protected on the saturation, put forward two electric current pass zero hour linear to spread person who become put into differential to protect in ct in recent years, avoid ct saturation district, can judge the bus bar trouble correctly
但是在母線區外發生短路故障（特別是故障電流含有大量非周期分量）時， ct會出現飽和現象， ct飽和后，不能正確地傳變一次側電流，從而使二次電流發生嚴重畸變，產生很大的差電流，這樣就容易引起誤動作。防止ct飽和時差動保護誤動作一直是母線保護的一個重要課題，近年來提出的在ct二次電流過零時的線性傳變區投入差動保護，避開ct飽和區，能對母線故障做出正確判斷。In the project of local power network short - circuit calculation, protection coupling and archive management, a second - exploitation of autocad is used to get an expected graphics system
在「地區電網短路計算、保護整定及檔案管理程序的研究」項目中，採用對autocad進行二次開發來獲得所需要的圖形系統。Main technic of giss webgiso thus function modules architecture and network topological structure are confirmed webgis system implements the basic function of electronical map, such as map zoonu pan, and the abundant query of geograph and database by using maplnfo mapxtreme for java as map server and jsp., java technico this system also can implement the routing of linesx analysing of buffer and so on0 this paper advances storage model of roads and pipelines topology data, efficiently solves the maintenace problem of network topology data of webgis and implements the shortest path algorathm based on webgis by improving it0 the system has better opening by suppling database interface of map ? the system has perfect on - line help and user forum and favorable interfaces and implementation of this system makes fundament for the further research of webgiso
本系統利用mapinfomapxtremeforjava作為地圖服務器，採用jsp和java技術，實現了基於webgis的電子地圖的縮放、漫遊等基本功能，並具有豐富的圖文定位查詢功能；實現線路路由、緩沖區分析等輔助決策功能；構建了道路管線網路拓撲數據的存儲模型，有效地解決了基於webgis的網路拓撲數據的維護問題；對dijkstra演算法進行了一些改進，實現了基於webgis的最短路徑演算法；本系統提供了電子地圖數據庫介面，使本系統具有很好的開放性和通用性； webgis系統軟體具有完善的在線幫助和用戶交流論壇，人機界面友好。The problem about neutral - point - grounding mode is an all - around technical problem which associated with not only power system reliability ， insulation coordination ， electromagnetic interference ， but assault safety 。 in china ， the neutral grounding modes of the 10kv net involved of none grounding, grounding by arc suppressing coils, resistance grounding or reactance grounding in the past 。 with the development of civic power network ， low resistance grounding mode was used to restrain the over voltage, particularly in guangzhou, shanghai ， beijing ， and zhuhai etc. it was reported that the over - voltage level of low resistance grounding mode is lower than that of arc suppressing coil mode, but the operation carried out the other way 。 at substations in guangzhou and shanghai it was found that the low resistance grounding mode is successful 。 but in some areas ， such as zhuhai ， substations grounding with low resistance revealed some problems ， including power supply reliability rapidly dropping ， transmitting line often tripping ； and person safety being threatened 。 so interiorly the grounding mode selection of the 10kv network was disputed, which mainly focused on the fault form of 10kv net grounding, the apply area of suppressing arcing coil grounding mode, power supply reliability level of the two modes, person safety, communication interfere and the workload of maintenance
爭議點主要是在10kv電網接地故障的形式、消弧線圈接地的應用范圍、兩種運行方式供電可靠性的高低、人身安全、通訊干擾和運行維護工作量等諸多方面。 11 17本論文就是針對以電纜為主的城區10kv電網中性點接地方式的選擇問題進行研究。論文首先對10kv電網的中性點運行各種方式進行分析，比較各方式的特點，然後以重慶儲奇門變電站10kv電網的實際參數來建立數值計算模型，在考慮了電網接地電容電流變化、中性點電阻取值大小、接地點接地電阻值變化等多種影響因素的情況下，對中性點經消弧線圈接地和經小電阻接地方式下電網的過電壓水平和接地點短路電流大小進行了數值計算，其計算結果與電科院所作現場試驗進行了比較。Research on the shortest path of material transportation in interval time
物資調運時間為區間數的最短路問題研究Concretely we discuss the application of the shortest path problem, traveling salesman problerm and project management method on the touring itinerary improvement of travel agency. furthermore, we explore the use of minimum spanning tree problem, overlaid problerm and maximum flow problerm on the touring itinerary improvement of scenic spots. and also enclosed detailed spreadsheet solutions
具體的，討論了最短路問題、旅行商問題和排程問題在旅行社線路優化中的應用；討論了最小支撐樹問題、覆蓋問題和最大流問題在旅遊景區線路優化中的運用，並在附錄中給出了詳細的電子表格解法。It has been verified by simulation tests that the symmetric short - circuit protection can not only avoid the starting current but also achieve higher sensibility ; unbalance protection can distinguish unbalance short - circuit and loss of phase. the operation parameters of other protective functions has all reached the design requirements
短路保護既能躲過起動電流，又有較高的靈敏度；不平衡保護，能準確區分不對稱短路和斷相故障；其它保護功能的動作指標均達到了設計要求。We got the spatial distribution map of population density by spatial interpolation, in which the population data are distributed on the grids. the results of the distribution of interpolated based on gis is closed to a real population distribution. the combination of the spatial interactive models and a shortest path algorithm for public transit network is analyzed by supermarket ' s accessibility based on pedestrianism and public transit. this methods may be used to investigate potential supermarket ' s locations. the quantitative analysis about the supermarket ' s market area is realized based on trade mode of lashmanan and hansen, which mainly includes spatial distribution of population, traffic accessibility and free competition between different firms
文中應用空間內插技術實現了人口數據空間分佈化，將人口數據通過空間插值分佈於研究區域內，使人口空間分佈更接近實際；應用公交最短路徑演算法及空間相互作用模型實現了基於步行和公交出行的超市可達性，將交通對超市選址的影響定量化，方便了方案的比選；在綜合考慮人口空間分佈、超市交通可達性、現有零售商業競爭態勢的基礎上，基於拉、漢購物模式實現了超市商圈定量分析。Electrical network short - circuit current computation analysis and controlling measurement in baotou area
包頭地區電網短路電流計算分析及其控制措施Lianyungang port, the world renowned eastern headbridge of the new eurasian continental bridge, offers the shortest path for the foreign trade and export of the middle and north - west china. the railway from lianyungang, going west across our middle areas alongside longhai line, lanxin line, beijiang line, and connecting eurasia through the railway network of former soviet russia and west - europe, provides the shortest railway transportation between pacific and atlantic seacoast
連雲港港是我國中原和西北地區最短路徑的出海口岸和對外貿易口岸，也是世界著名的亞歐大陸橋的東方橋頭堡，從連雲港沿我國的隴海、蘭新、北疆鐵路向西，橫穿我國中部，通過原蘇聯與西歐鐵路網連接亞歐大陸，提供了太平洋和大西洋沿岸最短的鐵路運輸。Standard for metal - enclosed low - voltage power circuit breaker switchgear - amendment 1 : short - time and short - circuit withstand current tests ; minimum areas for multiple cable connections
金屬殼密封的低壓電力線路斷路器開關設備標準.修改1 :短時間和短路可耐電流測試;多電纜連接的最小區域One is the " belt persistence ", which is defined as the total length of joints teace length in a 1m wide belt projected to a basic line ( eliminating the overlay section ) over the length of the basic line. another is the one called as " search persistence ", which is defined a as the total length of joints trace length on the searched potential slipe surface over the length of the slip surface. thus, the author establishes a measuring and calculation system to these definitions and finishes a great deal of field investigation aiming at the joints trace length and the " rock bridge " survey
在此基礎上，針對a區邊坡的穩定性，結合邊坡的破壞失穩模式，以邊坡節理巖體的連通特性的研究為突破點，從節理巖體的幾何參數的統計分析出發，採用monte - carlo隨機模擬原理形成節理網路模擬圖，以巖橋和節理組合破壞的內在機制為依據，以搜索節理巖橋組合的最短路徑為手段，通過帶寬投影法與路徑搜索法兩種方法的計算，獲得了sn向中緩節理的連通率分別為48 . 7和56 . 78 ，最終推薦60的連通率進行了邊坡的穩定性分析與計算，並結合工程實際，計算了邊坡的推力與錨固力，最終為邊坡的支護設計提供優化建議。When a high - power electric motor is starting, the current is heavy and the traditional protection strategy can ' t distinguish if it is a short - circuit current or the normal starting current, so the system is tend to make wrong
摘要大功率電動機啟動時電流較大，傳統的保護策略無法區分是短路電流還是正常啟動電流，易產生誤動。In this paper ， it is presented that an algorithm based on the least square principle is described ， which calculate the magnitude of low - frequency fault components in order to distinguish the fault location ， and it solve the decreasing operating zone problem of zone i distance relays
本文提出一種基於最小二乘演算法計算低頻分量的方法來區分線路串補裝置前後短路故障，從而解決距離段正向保護范圍的縮短問題。Finally, the main function of the developed practical system was introduced. it could offer inquiry processing of transportation information, general geographic element information and the shortest paths for users in any place and any region of sifang district of qingdao city. it also provided detailed data and scientific basis for the government ' s comprehensive decision such as in the department of transportation management, city planning committee and so on
最後，介紹了應用系統的主要功能，它能為用戶提供青島市四方區任一位置、任一區域的交通信息，一般地理要素信息以及最短路徑查詢等信息，也能為交通管理、交通規劃等部門的綜合決策提供該區的詳盡資料和科學依據。Interval routing scheme was introduced to reduce the size of routing tables, multi - dimensional routing scheme is the extension of interval routing scheme and it can represent all shortest paths between each pair of nodes, which turns out to be convenient when problems related to flow control aspects such as fault tolerance and traffic load balancing are considered
區間路由方法是使用簡明路由表的一種路由方案，多維區間路由方法是區間路由方法的擴充，它能夠表示網路中每兩個結點之間所有的最短路徑。當我們需要考慮容錯、通信與計算量的負載平衡問題時，這將是很有用的。Slave cpu receives the spwm data and output the spwm wave by query the spwm table. the dead time is generated by hardware to prevent the h bridge arm from short directly. the power out module is protected for over current, over voltage and over heat
逆變器採用雙cpu結構，使用spi進行連接，主cpu完成輸入、輸出和spwm波形數據的計算，從cpu接收到spwm數據后使用查表方法輸出spwm波形，使用硬體電路生成死區時間防止橋臂直通，對輸出功率模塊進行了過流、短路、過壓、過熱保護。Firstly, the author introduces some examples of the increasing fault capacity in several area power systems of china. so it is necessary to make some research on fault limiter. then the author gives an overview of some existing fault current limiting technologies and novel superconducting, solid states fault current limiting technologies
首先給出了我國部分區域電網短路容量日益增加的實例，闡明了研究短路限流技術的必要性，介紹並評述了常規的限流技術和新型的超導、固態限流技術。分享友人