constant-level control 中文意思是什麼
constant-level control
解釋
恆定水平控制-
This paper presents a method that chopping wave is done by switch devices which consist of three - level resistance regulating module and intelligence power module ipm, and which realizes constant - current discharge of storage battery. to achieve the intelligence control of the drive protection and the discharge process of ipm, the paper designs circuit formed by igbt threshold drive pulse pwm signals. ipm fault - blocking protection circuit and microcomputer 80c196. the devices can accurately control the 0 ~ 150a discharge current and the discharge time of the storage battery and calculate the releasing power
實現蓄電池恆流放電過程智能控制是蓄電池放電裝置發展的必然趨，本文提出了一種通過三極電阻調節模塊和由智能功率模塊ipm為開關器件進行斬波從而實現蓄電池恆流放電的方法。為達到對ipm的驅動保護和放電過程的智能控制，文中設計了igbt門極驅動脈沖pwm信號形成電路和ipm故障封鎖保護電路及由單片機80c196為核心的微機控制器。本裝置能夠對蓄電池進行0 150a放電電流及放電時間的精確控制及釋放容量的計算。 -
It was specially pointed out that, when the tail water is constant maximum tide, the computed flood surface is higher than that of nonsteady current, so there is some safety superelevation. underestimation of the roughness will make downward bias to compute along - river surface and bring hidden trouble for flood control. to improve the section can decrease the water level or offset the water rise for increase of floodplains " roughness, but it need much engineering works
特別提出，按照恆定流計算出來的設計水位比非恆定水位具有一定的安全儲備；而對于灘地糙率的低估又會造成設計水位的偏低，給防洪工作帶來隱患；如果利用改進斷面形式來降低水位或彌補糙率增加帶來的水位抬高，需要較大的工程量，所以平時應注意灘面的減糙管理工作。 -
The product is suitable for double straight line smoothing of grinding flat glass. coarse grinding, fine grinding, and polishing can be done at one time. adopt plc control system, which sets processing parameters via interface, and finishes processing at one time, ti has stable bottom structureprecise and smooth transmission system, the transmission belt drive adopts strong power and tran - sfrequency motor to control speed, constant power, constant rule, output and advanced equipment to control, completed product has high polishing level, which is an ideal option assistant processed equipment of processing delicacy glass and furniture glass factory
本產品適用於磨削平板玻璃是雙直線平邊，粗磨精磨拋光一次完成採用plc控制系統通過界面設定加工參數次完成加工，具有穩重扎實的底座結構，精確流暢的傳動系繞，傳送皮帶驅動採用功率變頻電機調速控制，恆功率恆扭矩輸出和高配置的控製成品拋光亮度高是加工精品玻璃和傢具玻璃廠家使用的最佳輔助加工設備。 -
In this thesis, first, we present the theory of sess system, the generation of the sess spreading code and its characteristics and the acquisition theory of conventional spread spectrum communication system. an efficient acquisition scheme based on periodically transmitting the synchronization head, which is composed of binary chaotic codes, using the matched filter and automatic decision threshold - level control based on a so - called constant false alarm criterion for sess system is present. the acquisition model of sess system is built and simulated in the awgn channel, the raleigh fading channel and imulti - address interfere condition
本文首先概述了自編碼擴頻通信的原理、自編碼擴頻序列的產生方法及其特性和擴頻通信系統編碼同步的理論，然後針對自編碼擴頻通信系統提出了擴頻序列捕獲方案:周期性地加入混沌序列同步碼，並採用恆虛警率匹配濾波器捕獲法;在加性白高斯噪聲通道、瑞利衰落通道和多址干擾情況下進行了模擬，分析了各種捕獲性能:在選擇性能最優的混沌序列、適當的序列長度、虛警概率及門限值的情況下，可以獲得較短的捕獲時間和較大的捕獲概率。 -
As iso9000 system evolved in different historical period, the first edition ( 1987 ), the second edition ( 1994 ) and the latest one, the third edition ( 2000 ) of that were constantly updated and upgraded. the latest edition of 1s09000 system not only fully embodied the eight principles of quality management, which were generally recognized and accepted by quality control circles in the world, with the china ' s successfully admission to wto membership, as an evaluating rule to measure the level of an enterprise quality management, iso9000 system under constant evolution for excellence will surely give an impulse to enterprise to perfect their quality strategy so as to satisfy the need of market under the new situation. only by equipping proper concept of quality value and quality culture, develop quality strateg ) suitable to new market rule and international economy situation, our enterprise can elevate the comprehensive competitive strength by continuously quality improvement, that will pave a way for enterprises in 21s1 century to survive permanently
隨著iso9000系列標準在不同歷史時期的演變，第一版（ 1987年） 、第二版（ 1994年）及最新的第三版（ 2000版）的iso9000系列標準得到不斷修訂和調整，最新版的iso9000標準充分體現了當今世界上質量界最普遍接受和認同的質量管理八項原則，隨著2001年12月我國加入wto的契機， iso9000系列標準作為企業質量管理水平的評價準則，它的不斷進化必然促使企業不斷調整質量戰略來滿足新形勢下的市場要求，只有建立正確的質量價值觀並注重培育企業的質量文化，制訂適應于新的市場運作規則利國際市場環境的質量戰略，才能使我國企業通過不斷提高質量管理的水平，來提升企業的綜合競爭實力，這已成為二十一世紀企業的長久生存之道。 -
This assumption reflects the real life that supplier usually visits a retailer randomly in a definite interval and the retailer shall replenish his stocks in accordance to the policy to control the replenishment up to a constant level
這種背景代表這樣的現實生活，供應者拜訪零售商在一個時間段內的隨機時刻，而零售商按照一個固定的補到水平控制策略補足庫存。 -
The result of long - term operation shows that the computer control system is practical and effective, it can run in the optimal state within a long duration to fully realize data collection and process, remote data transmission and vfvs constant injection control of pumps. it speeds up the automatic procedures of the seawater treatment process, really realizes the unmanned working, decreases the physical intensity to a large extent, improves the management, enhances the management level, avoids equipment wear down as much as possible, makes the seawater treatment efficient and lessens the cost of production
長期的運行結果表明，該計算機控制系統的實施切實有效，既成功實現了對被檢測參數的數據採集與處理、遠傳以及注水泵機組的變頻調速恆壓注水控制，又提高了系統的自動化程序，真正實現了無人值班作業，在很大程度上降低了工作人員的勞動強度，極大的改善了現場的管理狀況，提高了生產管理水平，且有效避免了設備損耗，提高了水處理效率，降低了生產成本。 -
The study bases on the four operating conditions of which the longnan network will be implemented in the year of 2005 and 2010. first, this paper calculates the power flow distribution that including the line charging reactive power and input of the low - voltage shunt reactor in chengxian s / s. assumed that the bus voltage of tianshui s / s and bikou power plant to be constant, the study count the voltage level of the 330kv and 220kv bus - bar when the 330 / 220kv transformer in standard tap changer position. in order to set control rules
本文基於隴南電網在規劃發展水平年2005年及2010年的四種可能的運行方式下及潮流條件，計算出了計入線路充電無功及投入成縣變低壓並聯電抗器后的潮流分佈，在設定甘肅大網側及碧口電廠側母線電壓恆定條件下，計算了330kv及220kv主變在有載調壓標準分接頭變比下的330kv及220kv母線電壓水平。 -
The system is based on chopper constant current drive technique, according to the top level design idea, adopting advanced specical subdivision control integrate circuit and powerful function 80c196kc to organize the system frame, desiging the minimum system of single - chip microcomputer, multifunction i / o interface circuit, relay switch circuit, keyboard and display circuit, multifunction digital setting interface circuit and so on, utilizing the hso and hsi interface circuit which are owned by this single - chip microcomputer exclusively and its powerful command system to realize dual - degree switch control, automation orientation, automatically searching zero position, locking machine when stopping, frequency to set digitally, automatically adjusting speed through changing frequency, swithing subdivision or squarewave control, on the basis of above, the system also have the function of running according to the setting steps and the frequency, voltage and current to display through the led, etc
系統基於斬波恆流驅動技術，按照頂層設計思想，採用先進的專用細分控制電路和功能強大的80c196kc單片機來組建系統構架，設計了單片機最小系統、多功能i o介面電路、繼電器切換電路、鍵盤顯示電路和多功能數字設定介面電路等，利用該單片機獨有的hso和hsi介面及其強大的指令系統，實現了雙余度混合式步進電動機的余度切換控制、自動定位、零位自動搜索、停機鎖定、數字化頻率設定、自動調頻變速控制、細分方波切換控制，在此基礎上，該系統還設有按預置步運行、 led頻率電壓相電流顯示等功能。 -
The gain stage operates at a constant level regardless of the setting of the master level control, and so the sound of this circuit will not alter at various level settings
無論主音量控制的位置如何，放大級都可以工作於一個穩定的電平，並且不同的音量設定不會引致該電路的音色變化。 -
Full - stainless stell ; oil - water separator, liquid heating ; auto - matic constant tempertature ; outside - jiint water or air cooler ; solution recobering system to keep the solution clean for a long time ; level auto - control ; fast cooling and drying ; convenient draining ; double protecting debice ; auto - reset function
全不銹鋼結構，內置油水分離器，液體加熱與自動恆溫，外接冷水機，或冷氣機組，溶劑回收再生，使清洗劑長期清潔，具有液位自動控制，快速冷卻乾燥，排污方便，雙重保護裝置，自動復位功能。 -
Today, mw wind generators substitute 600kw generators gradually and become the popular units of international market of wind power generation. the trends of units are variable speed constant frequency and large - scale and pitch control. there are many different generators which are variable speed constant frequency generator. in this paper the unit is fully - fed magnet wind turbine generator. the magnet wind turbine generator grid - connected inverter is the key component of connected system. the main function of this component is inverting the dc to three - level volage and connecting the electric net
實現變速恆頻發電的方法眾多，本文研究的是較常用的一種方案。該方案採用直驅永磁風力發電機通過變頻器直接連接到電網。永磁風力發電機並網逆變器是並網發電系統的核心部分，其主要功能是將經過整流、斬波升壓后的直流電逆變成三相交流電，並送入電網，實現並網。 -
Two abb frequency converters and a siemens programmable logic controller ( plc ) are with the lower - level computer and industry computer are with the host computer. the communication between with the host computer and low - level computer not only translate the system condition, but also send the control instruction. the system condition is shown with chinese window in the host computer, and the constant stress function is realized through the frequency converter part
2臺變頻器和plc作為下位機設備，工控機作為上位機集中控制，上下位機之間通過通訊，把系統當前狀態、當前給定通過上位機來綜合判斷，並通過上位機以漢化界面形式予以顯示，而下位機的變頻部分則實現管網的恆壓功能， plc實現4臺水泵機組邏輯控制和定期巡檢，及部分故障綜合報告。
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