variation and control 中文意思是什麼
variation and control
解釋
差異和控制-
In recent years, the water - saving and control irrigation technique of rice has diverted from plot experimental and demonstration to lare scale. and has got remarkable economic and social benefits. amed at the characteristics of this irrigation area, optimal selection for water - saving techniques of rice, deciding the amout of leaching water and irrigation modles, investigating the adaptability of the water - saving and control irrigation technique in saline land. studying the increase in production mechanism of the technique are important to extend the technique, to better and develop saline land as well as slick spots. according to the results of field experiments, optimization study was conducted on the water - saving irrigation technique of rice in saline land, the effects of different water - saving irrigation techniques on the physiological indexes and yield of rice were systematically analyzed. by using mutiplepurpose fuzzy optimization method, better. water - saving irrigation technique was selector out, that is. the control irrigation technique in rice. the mechanism of it was analyzed from the aspect of the physiological and ecological saving water of rice to provide the implemental process and technical point ; throgh the quantitive analysis and comparision on control irrigation and control class ( flood irrigation ), high production and quality mechanism of the technique was analyzed in terms of physiology indexes of rice, the variation of soil moisture, the pest resistance and the lodge resistance, the change of soil temperature in paddy fields. the yield constitutive factors, the quality of rice and so on. in saline land. control irrigation and intermittent leaching modles were adopted to validate the adaptability of the technique in irrigation of rice in saline land, to analyze rice ' s physiological - ecological indexes and the change of soil salt content under the conditions of control irrigation leaching of rice and and to provide control irrigation and combined modle of intermittent leaching to adapt to different conditions
本文從試驗及試驗資料入手，取得以下主要成果和結論：對鹽堿地水稻節水灌溉技術進行優化研究，系統地分析了不同節水灌溉技術對水稻生理指標及產量的影響，採用了多目標模糊優化的方法，對灌水技術進行綜合評判，優選了節水灌溉技術，論證該地區宜採用水稻控制灌溉技術；闡述控灌技術通過調節和控制水稻的需水規律，降低水稻高產情況下的無效水量消耗，從水稻生理、生態節水兩方面分析了控灌技術節水機理，針對性地總結出水稻各生育期實施節水控灌技術的步驟及技術要點；通過控灌與淹灌的定量對照比較，從根系、莖蘗、冠層葉片及綠葉動態到株高，土壤水分變化，抗病蟲害、抗倒伏能力，稻田土溫變化，產量構成因素及稻米品質等諸多方面進行動態比較，分析控灌技術高產優質機理；在鹽堿稻地採用控制灌溉+間歇淋洗模式，跟蹤測試田間水鹽變化狀況，驗證控制灌溉技術在鹽堿地區水稻灌溉中應用的適應性，通過分析水稻控制灌溉淋洗條件下水稻生理生態指標，提出優化控制灌溉+間歇淋洗組合模式，為進一步在高礦化度地區試驗水稻控灌技術奠定基礎。 -
Based on consider hereinbefore, this dissertation discusses several aspects on the problem of the sustainable and optimum exploitation of groundwater resources as follows : ( 1 ) reviewed entirely the origin and evolvement of the concept " sustainable development ", stated and commented the study status in queue on " sustainable development " around national and international range, thorough discussed the science connotation about the concept " sustainable development " ; ( 2 ) looked back and commented across - the aboard some furthest basic concept and proposition related to groundwater resources, put forward self opinions on a few existent mistake points of view and chaos understandings ; ( 3 ) expatiated entirely on the content and meaning of the theory of changeable groundwater resources system, contrast with the traditional methods of groundwater resources calculation and evaluation, combined example to show the application of this theory ; ( 4 ) thorough analyzed the difficult and complexity to forecast the groundwater resources, fully stated the traditional methods of groundwater resources forecasting, pointed out the characteristic and applying condition of these forecasting method, introduced the main ideas and methods of wavelet analysis developed recently, and the matlab software be known as the fifths era computer language, and its accessory wavelet analysis toolbox, applied these methods and tools to analyze the groundwater dynamic curve, adopted the b - j method and morte - carlo method, combined with the theory of changeable groundwater resources system, discussed the new view on the forecast of groundwater resources ; ( 5 ) synthetically analyzed the characteristics and limitations of the present all kind of groundwater manage model, combined mathematical programming mathematical statistics random process and the theory of variation system of groundwater resources on the unite optimum attempter of surface water and groundwater, emphasized how to make the model more nicety, more simple, more practicality ; ( 6 ) analyzed the inside condition and outside condition to assure the sustainable and optimum exploi tation of groundwater resources, the inside conditions are the follows : correct resources idea, scientific methods of resources calculation and evaluation, credible forecast methods of resources, exercisable measures of resources management, the outside conditions are the follows : the development idea of high layer, the transform of manage system, the matched policy and rule of law, the adjusted of economy lever, the improve of cultural diathesis, the boosting up of water - saving consciousness and detail measures, the control of population rising, the prevention and cure of water pollute, the renew and rebuild of ecology ; ( 7 ) scan the sustainable and optimum exploitation of groundwater resources from the high level of metagalaxy, earth system science, and philosophy ; lint out the more directions on groundwater resources
基於以上考慮，論文主要從以下幾方面對地下水資源可持續開發問題進行了比較深入的探討：全面回顧了「可持續發展」概念的由來與演變，對國內外「可持續發展」的研究現狀進行了述評，並對「可持續發展」概念的科學內涵進行了深入探討；對涉及地下水資源的一些最基本的概念和命題進行了全面的回顧和評述，對目前仍然存在的一些錯誤觀點和混亂認識提出了自己的見解；全面闡述了地下水資源變值系統理論的內容和意義，並與傳統的地下水資源計算評價方法進行了對比分析，結合實例具體說明了方法的應用；深入分析了地下水資源預測預報工作的極端重要性和復雜性，對傳統的地下水資源動態預測方法進行了全面的評述，指出了各類預測預報方法的特點及適用條件，對最近二十多年剛發展起來的小波分析技術的主要思想和方法及其應用范圍，以及號稱第五代計算機語言的matlab軟體和附帶的小波分析工具箱進行了介紹，並應用於地下水動態過程線的分析，採用時間序列中的b ? j法，蒙特卡羅方法，與地下水資源變值系統理論相結合，探討了地下水動態資料分析和地下水資源預測預報的新思路；綜合分析了現今各類地下水管理模型的特點及缺陷，將數學規劃、數理統計、隨機過程等與地下水變值系統理論相結合進行地表水地下水或多水源的聯合優化調度，使模型更準確、更實用；對保證地下水資源可持續開發的內部條件和外部條件進行了分析，內部河海人學博卜學位論文前言、摘要、目錄條件主要是正確的資源觀，科學的資源計算與評價方法，可靠的資源預測預報技術，可操作的資源管理措施，外部條件主要是高層發展思路、管理體制的變革、配套的政策法規、經濟杠桿的調節、人文素質的提高、節水意識的增強及具體節水措施、人口增長的控制、水體污染的防治、生態的恢復和重建等;從宇宙科學、地球系統科學及哲學的高度審視地下水資源的可持續開發;指出了地下水資源可持續開發的進一步研究方向。 -
During recent decade and more, major and super floods have taken place frequently in the yangtse river and huai river. the natural phenomenon of flooding is inevitable. it is not a surefire plan only to take engineering measures for flood control while climatic variation is far from being known
近十多年來在我國長江、淮河流域連續不斷發生的大洪水或特大洪水再次向我們展示了這樣一個道理，洪水是一種自然現象，當環球大的氣候因素及其變化規律遠未被認識時，試圖僅依靠工程措施來控制洪水並非萬全之策，逐步運用非工程措施，常常能起到「以柔克剛」 、 「以弱勝強」之功效。 -
And climatic variation is a main factor affecting desertification. the sustained period of water deficit is a direct cause of desertification in arid and semi - arid areas. the tectonic activities of lithosphere control the distribution of desertification by constructing geomorphology
提出了自然作用在土地荒漠化演化中佔主導地位，其中，氣候變化是控制土地荒漠化進退的首要因素，地表水持續虧損則是導致乾旱、半乾旱地區土地荒漠化發展的直接原因。 -
Traditional control system for boiler superheated steam temperature regulates desuperheating water flow through testing the superheated steam temperature and its variation trend, thus keeping the temperature of superheated steam within a permissible range
摘要傳統的鍋爐過熱蒸汽溫度控制系統通過檢測過熱蒸汽溫度及其變化趨勢來調節減溫水量，從而維持過熱蒸汽溫度在允許的范圍之內。 -
The variation of nutrients in the survey area is mainly controlled by the combination of changjiang dilute water, taiwain warm current and the activity of plankton as well, and the control mechanism of nutrients also shows a seasonal variation in the survey area
42 . 52 . 6于促進硅藻的生長，較低則相對有利於甲藻生長:同時加磷對小型浮遊動物的生長也有一定的從促進作用。 -
Aiming at such problems in combustion system of homemade middle and miniature boiler, as a complex system with the character of dead zone, time variation, serious non - linearity, large time delay, coupling and a lot of disturbance, this paper presents a new set of optimal control resources. by using well - matched control method on system, stable automatic running is realized. having the serious divulgence coals difference a lot from each other in character, instability of chemistry, value of lowest emission of heat, home - made boiler controller is not at all ideal. instead of traditional model that controls the ratio based on proportional control or with the correct signal of the amount of oxygen, this paper, combined with intellect control theory - - fuzzy control and self - optimizing concept, propounded a kind of fuzzy self - optimizing controller to be used in air supplying system of the boiler, and expatiates on the idea of dividing the control process into two parts, dynamic and static to realize, thus meets the demand of homemade boiler economic running
本設計針對國產中、小型電站鍋爐燃燒系統參數時變、嚴重非線性、干擾因素復雜、耦合嚴重、模型不易確定的特點，提出多變量協調控制方案，解決了系統可控性差，難以實現穩定自動運行的問題；在此基礎上，改變以往以煙氣含氧量控制送風的傳統模式，針對國產電站鍋爐設備主體及一、二次送風迴路泄露嚴重，煤種混雜、成分不穩定、燃燒發熱值低、燃燒效率不高等問題，應用智能控制理論中的模糊控制技術，結合自尋最優控制的思想，設計了一種模糊自尋優控制器，應用在電站鍋爐送風控制系統上，並闡述了動靜態兩種實現途徑，通過在線優化風煤配比，實現最佳經濟燃燒，切實保障了鍋爐的經濟運行。 -
Up to now, extensive biological, chromosomal structure and variation, dna polymorphism, breeding application as well as pest control studies have been conducted. alpha - amylase is a functionally important enzyme for silkworm that feed on mulberry leaves
迄今已對野桑蠶進行了廣泛的生物學上的研究、染色體結構及變異研究、 dna多態性研究、家蠶育種上的應用研究以及作為桑園害蟲防治上的研究。 -
According to the variation of the relative weight of rs and seo, refinancing can be divided into three steps, the primary stage, the formed stage and dualization stage. only the qualified listed companies can ration shares, while unqualified those will endeavour to control rate of equity ( roe ) to ration shares by the reshuffling of assets, related trades and dividend distribution strategy
上市公司必須具備一定的條件才能配股，不具備條件的上市公司則會竭力操縱凈資產收益率以滿足配股條件，上市公司是通過利用資產重組、利用關聯交易、利用四項計提以及利用股利分配策略來操縱凈資產收益率的。 -
But the variation of its aerodynamic forces will induce flapping motion and produce the cyclic pitch on the main rotor blades by the bell mixing mechanism. in order to study the effect of bell - hiller stabilizer bar on helicopter stability and control, this paper first analyze the function and the principles, give the flapping equation and a flight dynamic model with bell - hiller stabilizer bar. and then works over the stability and control of uav r - 50 in hover and cruise condition, and analyzed the influence from parameters of the bar to it
為了深入研究希勒伺服旋翼對直升機穩定性和操縱性的影響，本文首先分析了希勒伺服旋翼的功能和工作原理，推導了伺服旋翼的揮舞運動方程，建立了帶有希勒伺服旋翼直升機的飛行動力學模型，然後以yamahar - 50無人直升機為例，分析該直升機在懸停和前飛時的平衡、穩定性和操縱性，在此基礎上進一步研究希勒伺服旋翼設計參數變化對直升機穩定性和操縱性的影響。 -
Product characteristic : vmate entire, function table model keyboard ; peleco " d p " agreement, baud rate 4, 800, peleco " p " agreement, baud rate 2400rj - 45 connection ; the three dimensional rocking bar may carry in the accuracy control keyboard to quick ball each kind of speed the pressed key to be allowed to choose the camera the address ; transfer ball machine function menu ; processing pre - placed position ; opens and closes the small aperture ; focal variation and focusing lens ; the start stops automatic and the random scanning function
三維搖桿可對快球的各種速度進行精確控制鍵盤上的按鍵可以選擇攝像機的地址碼調用球機功能菜單處理預置位打開及關小光圈變焦及聚焦鏡頭啟動停止自動及隨機掃描功能 -
And secondly target and methods about quality control to construction project, have the affect factor " 4m1e " to quality variation under analysis and control, that quality to be influenced, seven kinds of means and tools of mathematical statistics to control quality and basic work need to do
接著對施工項目質量控制的依據、目標和方法，影響質量變異的「 4m1e 」因素的分析和控制、數理統計控制質量的七種工具和方法、需做的質量基礎工作等作了全面的論述。 -
Comparing the real electromagnetism torque and the ideal electromagnetism torque, we can find the trend of the speed variation, and then we can control the motor properly
實際電磁轉矩與理想電磁轉矩相比較，即可得到電機轉速的變化趨勢。 -
1 in most cases, periodic evaluation of test and control materials is necessary to determine the variation in magnitude and direction of property changes as a function of exposure time or radiant exposure
在大多數情況下，有必要定期評價試驗材料和控制材料，以測定（塗料）屬性改變在大小和方向上的變化.該變化是暴露時間或輻射曝露量的函數 -
Abstract : the physical significances of the reaching law parameters and the qualitative relationships among them in variable structure control ( vsc ) are analyzed. according to the relationships, a reaching law control method is put forward based on fuzzy rules. to improve control quality, the reaching law parameters are selected by fuzzy rules. the control scheme presented in this paper not only preserves the advantages of traditional reaching law control, that is, insensitivity to any variation and perturbation of the plant parameters, but also possesses the adaptation to control quality of variable structure control systems. the simulation results show the chattering in vsc systems is highly reduced
文摘:分析了變結構控制設計方法中趨近律參數的物理意義及參數之間的定性關系，根據這些參數的定性和不精確關系，提出了基於模糊規則的趨近律控制? ?模糊趨近律控制，即用模糊規則來選擇趨近律的參數，以達到改善品質控制的目的.模擬結果表明，筆者給出的方法既保留了傳統趨近律方法所具有的較強魯棒性優點，又使控制系統的品質控制具有較強的自適應性，同時還比傳統趨近律方法更有效地削弱變結構控制系統中固有的顫振 -
Constant stator magnetic linkage control frequency converter includes power devices utilizing igbt, drive circuit using three - phase drive ic with multiple protection functions. pwm signal formation circuit in the way of voltage space vector control and realized with pld ( programmable logic device ) devices and compensation for the influence of supply voltage variation and stator resistance voltage drop
其中，恆定子磁鏈控制變頻器的設計中主電路採用功率器件igbt ；驅動電路採用三相多功能集成驅動晶元； pwm脈寬調制信號產生電路採用電壓空間矢量控制方式，由pld器件實現；對電源電壓變化及電阻壓降造成的影響進行了補償。 -
The paper introduces the development of the thickness control technology for strip mill, and reasons affecting thickness variation, and discusses the principle of agc control on cold mill, the algorithm and characters
摘要介紹板帶軋機厚度控制的發展及影響板帶厚度波動的原因；分析、討論冷軋機應用的各種agc的控制原理、控制演算法以及各自的特點。 -
This paper introduces the change and claim happened during construction of zhuzhou navigation - power junction ' s lock project, summarizes the control method, procedure and management effect of engineering contract variation and claim, and presents some understandings to contract variation of low - price accepted bids and claim management
摘要介紹了株洲航電樞紐船閘工程施工過程發生的變更與索賠情況，總結了工程合同變更與索賠的控制方法、辦理程序、以及管理效果，探討了低價中標項目合同變更與索賠管理的一些體會。 -
This paper also analyzes the fore - and - aft behaviors of earnings and rising ability about different chinese listed companies with reverse change in p / e ratio. through analyzing the net profit and operating cash flow variation trend of sample and control sample companies, this paper finds that the performance of the company with 3a after the reverse change in p / e ratio
通過樣本與控制樣本凈利潤和經營活動現金流差異的趨勢分析，發現3a公司在市盈率反轉后表現稍遜于反轉前，基本上反映了3a公司進行的是投機性的盈餘管理行為; 3d公司在市盈率反轉后表現優于反轉前，也說明了3d公司進行的是信息發放性的盈餘管理行為。 -
After - activity cost control method the author here put forward the analysis of the cost difference. propose the measures to be taken to correct the variation and the operating way of the after activity cost control
事後成本控制方法。主要是提出了分析成本偏差方法，制定了糾偏措施，提出了事後成本控制的運行方式。
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