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。
We used four different wavelength light including red light ( 750nm ), yellow light ( 580nm ), green light ( 560nm ), blue light ( 400nm ) to stimulate four different groups compound eyes. then the ultrastructures of the compound eyes of each group were observed under electron microscope. the results showed the fine structure of the photoreceptor, the diameter of rhabdom, the dimension of perirhabdom vacuole, the number of pinocytotic vesicle below the microsvilli, the location of pigment granules, the emergence of lamellar bodies and lysosomes in cytoplasm, were different in different light adaptation
二、不同光照條件下復眼超微結構的變化三疣梭子蟹經過12h暗適應后,在不同
波長的紅光( 750nm ) ,黃光( 580nm ) ,綠光( 560nm ) ,藍光( 400nm )照射下,其光感受器的小網膜細胞和感桿束的形態和超微結構呈現較大的區別,感桿束的形態、細胞內的胞器隨不同
波長光的適應而發生變化,在紅光下感桿束直徑最大,微絨毛排列整齊,在藍光下感桿束直徑最小,微絨毛最凌
亂。
Few countries have had such a troubled history as poland.
沒有幾個國家像
波蘭那樣有著如此動
亂的歷史。
The balts are also well placed to advise other countries how to turn rough - and - ready, ramshackle armies into something more professional
波羅的海人同樣還恰當地告訴其它國家如何將凌
亂的,搖搖欲墜的軍隊變得更加專業。
All the weapons in the museum discharged at once could not have more violently set in motion the sound waves.
即使這個炮兵博物館里所有的武器一起開火,也不會更厲害地擾
亂聲
波。
When the general stampede occurred winterborne had also been looking on.
當那場全面大混
亂發生的時候,維特
波恩還一直在旁觀著。
Prussia's rise coincided with the collapse of swedish power, with the disintegration of the chaotic, weakened polish kingdom.
普魯士生逢其時,正趕上瑞典的崩潰和動
亂不安,混
亂而衰微的
波蘭被瓜分豆剖。
Boeing wants to use existing wing and tail control surfaces that shift up and down about 20 degrees in a coordinated fashion to disrupt the vortical flow
波音公司則利用現成的機翼與機尾控制面,讓它們互相協調、上下移動20度,以擾
亂渦流。
She was stirred by this thought, angered by that - her own injustice, hurstwood s, drouet s, their respective qualities of kindness and favour, the threat of the world outside, in which she had failed once before, the impossibility of this state inside, where the chambers were no longer justly hers, the effect of the argument upon her nerves, all combined to make her a mass of jangling fibres - an anchorless, storm - beaten little craft which could do absolutely nothing but drift
她想到出外謀生的艱難-她已經失敗過一次了。她又想到不可能再留在這里了,她已經沒有資格住在這些房間里了。這些思緒再加上吵架給神經帶來的壓力,使她的思想就像一團
亂麻,理不出個頭緒來-一條沒有錨的小船受風雨的擺布,除了隨
波逐流,無能為力。
In the fourth chapter, firstly, the fsk / psk signal function is presented, then, the signal which frequency and phase are modulated by costas code and barker code for each are analyzed at the same time. after that, the target returns and clutter returns are analyzed and modeled. at last, both of the time correlation characteristics and space correlation characteristics are theoretically analyzed
在第四章中,首先給出fsk / psk信號的表達式,並對一種分別採用costas碼和barker碼進行頻率和相位調制的fsk / psk信號進行分析,然後對fsk / psk信號的目標回
波和雜
亂回
波進行分析與建模,接著,對雜
波信號的時間相關性和空間相關性進行理論分析,由分析結果可知, fsk / psk雷達雜
波的時間相關性不變、空間相關性增強。
They lived in a mud - brick house with a corrugated metal roof, chickens running freely outside
他們住在屋頂是
波狀鐵皮的泥磚屋裡,屋外雞只到處
亂跑。
Having received our disorganized thought waves, master would sometimes deliberately keep us waiting by telling the attendants to have us meditate for a while first
你可能不知道師父接收到我們亂紛紛的電波,偶爾會來個姍姍來遲!叫侍者傳話叫他們先打坐!