neutral selection 中文意思是什麼
neutral selection
解釋
中性選擇-
The selection of neutral - point earthing ways of the hydrogenerator of left - bank power station in the three gorges project should be related to one - point earthing protection of the stator of its generator within one hundred percent framework
三峽工程左岸電站水輪發電機中性點接地方式的選擇應和發電機100 %范圍定子一點接地保護相關聯。 -
Through analysising the characteristics of the power system with floating neutral point deeply, the paper puts forward a new plan of single - phase to ground fault line selection on the base of s ' s signal injecton method and gives the hardware and software design. in this design, the high speed sampling and data processing is carried out through using dsp processor ; the large electrice current is drived through the application of a high - performance audio power amplifier and transformer ; the communication between host computer and detectors is realized through rs485 bus technology ; the difference multilevel frequency - selected amplifier is designed and the feeble signal of space is sampled on the base of the theory of magnetic induction ; the interface between dsp and exterior chip and rs485 interface logical is designed through using fpga ; the using of lcd module and keyboard interfacing chip makes the interface between human and machine ; the programme of host computer and detectors is designed through using blocking design method
在本設計中，採用高速的dsp處理器，實現了對故障特徵信息的高速採集與處理;採用大功率的功放晶元與變壓器配合的方法，實現了大電流信號的驅動輸出;採用485總線技術，組建了裝置主機與多探測器之間的主從式通訊網路，實現了多干擾條件下裝置主機與多探測器的可靠通訊;設計了差分式多級選頻放大電路，採用磁感應的方法實現了對空間微弱信號的接收;利用fpga技術，實現了控制器與多外設的介面及數字信號的串並轉換;採用了先進的lcd液晶顯示模塊及鍵盤介面晶元，設計了人機信息交互的介面;採用了模塊化的軟體設計方法，開發了裝置主機及探測器的軟體程序。 -
Neutral mutation - - evolution at the molecular level is primarily determined by mutational input and random genetic drift, rather than by natural selection
天然突變- -演化過程中在分子的層次上主要是經由隨機的基因流而決定，並非藉由天擇所影響。 -
Therefore, the conclusion is valuable to engineering apply, and could be consulted for the selection of the neutral point grounding mode of the civic 10kv network
得出的這些結論具有相當的工程實用價值，為大城市10kv電網中性點接地方式的選擇提供了一定的參考依據。 -
Wavelet analysis theory and its application in power system have been introduced briefly. this paper gives a general overview of various neutral grounding modes. some existing theories schemes on the fault line selection have been summarized systematically
文中簡要介紹了小波分析的理論基礎及其在電力系統中的應用現狀，概述了配電網中性點各種接地方式的優劣，系統歸納了現有的各種選線原理和方案的特點，提出了尚需解決的問題，並給出了分析的結論。 -
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。 -
The calculation of the selection of the neutral - point earthing - transformer of the generator shows that the selection of its parameters should be matched with one - point earthing protection of the stator of its generator
對發電機中性點接地變壓器的選型計算表明，其參數選擇必須與發電機定子一點接地保護相配合。 -
The fund underperformed its benchmark over the month, primarily due to stock selection in various region components, particularly european and north american equities, whilst allocation to regions was largely neutral
基金于月內跑輸大市，主要受多個地區的選股表現影響，當中尤以歐洲及北美股的表現稍遜。至於基金在地區選取方面，則表現大致持平。 -
Because there is direct relation ship with fault currents and transient and dynamic voltages, in theory or practice, it is so complicated that the selection of generator neutral grounding model will affect or determine the generator protection scheme
由於暫態過電壓、接地故障電流等都直接與發電機接地方式有關，同時還影響或決定著發電機的保護形式，所以接地方式的選擇在理論和實踐上都是一個復雜的問題。 -
This is a big complicated monitoring and control system, the article only discusses a part of the units, includes : the components of neutral beam injection and the requirements for monitoring and control system, the argumentation and selection of control scheme, the research of data acquisition system based on pci bus, the design and realization of hardware and software of dac, the means of concentrated data storage and management, the communication program design of subsystem under different mode and protocol. the last part gives some experiment system running data
這是一個大型復雜的監控系統，本文只就其中的幾個單元的設計與實現展開討論，主要內容包括：中性束注入裝置的組成及其對監控系統的要求，監控系統控制方案的論證和選擇，基於pci總線的小型數據採集系統的研製，多功能數據採集卡的硬體和軟體的設計與實現，集中式數據存儲與管理的方法及其實現，多功能子系統之間在不同通信方式、不同傳輸協議下的通信實現及其程序設計。 -
So, their emotional recognition abilities are lower. ( 2 ) when recognizing facial expressions, abused children have a response bias for angry, whereas neglected children set a lower standard for selecting neutral emotion, no selection bias emerged for the other types of children
（ 2 ）在辨別面部表情時，被虐待兒童對「怒」有一種選擇性偏向，而被忽略兒童對中性表情的評定標準更寬松，其他類型的兒童則沒有任何偏向。 -
The influences of bus - connected networks, different monitoring points, low voltage windings and types of neutral point grounding on the frequency responses of pd signals are analyzed which give suggestions for the selection of monitoring band and monitoring points and pd localization
分析了繞組的外聯網路、不同的監測點、低壓繞組、中性點接地方式等對局放信號幅度、頻譜的影響，為局部放電在線監測頻帶、監測點的選擇以及局放的定位提出了具體的建議。 -
Secondly, it does not involve the selection of individual stocks and is therefore " market neutral "
其次，它並不涉及對個別股份的選擇，對市場影響較為中性。
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