population optimum 中文意思是什麼

Attention must be given to identifying the optimum pest population that will permit differentiation among genotypes.

要注意確定最適的害蟲種群，使不同的遺傳型能夠辨別。

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。

Introduction of prepotency operator in the initialize population step and the improved mutation operator accelerate the convergence process, and the introduction of new operator in forming new population step avoid converging in local optimum, and promote the ability of global convergence

演算法在初始化種群階段引入了「優生」運算元，以及改進的變異操作使演算法的收斂速度大大提高；在形成新種群階段引入新的運算元避免了局部早熟，提高了全局收斂能力。

Research on the scale of optimum population in qinhuangdao

秦皇島市適度人口規模研究

Study in harbin : optimum population

哈爾濱市適度人口容量分析

A thermodynamic explanation of the population carrying capacity and optimum population

人口容量與適度人口的熱力學解釋

Quantitative study of optimum population size and shaanxi province population capacity

陜西省人口承載力與適度人口定量研究

The optimum fertilization rate, population density and variety in these experiments have recommended to farmers

已將試驗所得最佳施肥量、種植密度和品種推薦給農民。

From the randomized initial population, using the operators such as select, crossover and mutation, it can converge the globe optimum solution

從隨機產生的初始種群出發，通過選擇、雜交及變異等遺傳運算元，使種群一代一代地進化到最優解。

The advantages of plantain at high population density include potential to increase yields significantly, better crop cycle planning to harvest during best market conditions, optimum use of land because one hectare of high density plantain can produce as much as 3 - 5 hectares of conventional planting, high production of good quality corms used as seed for the next cycle and intensive management resulting in a lower incidence of pests, diseases and weeds

大蕉密植的優勢在於：有顯著的增產潛力，有較好的生產周期以適應最佳市場條件，能高效利用土地（密植1公頃相當于通常的3 ~ 5公頃） ，可生產出可作為下季種子的大量優質球莖，集約管理可減少病、蟲、草害的發生。

( 3 ) the span analysis of the genetic operators. 8 schemes were provided to analyze the relation of the genetic operators such as population size, cross probability, mutation probability. at last, a optimum group of genetic operators was selected

提出8種方案來分析遺傳操作運算元（種群規模、交叉概率和變異概率）之間的聯系，並根據精度最高原則最終確定一組合適的遺傳操作運算元。

In c & c + + ga program, using the parameter num equal to population number will make ga compulate more efficiently. 5. converting nonlinear equations solution to ga optimum problem, and then the problem is discused in ga model, fitness, coding, operator & parameter, convergence critericm multi solutions 6 aspects

首次在c與c + +的遺傳演算法程序中，提出了隨機數產生周期等於群體規模的參數取值方法，實例計算說明，演算法的計算效率能提高一倍左右。

Because the right of development is basic one for mankind, so to clear away poverty is the first step. at the same time, we must improve the population ' s education, and only combination two aspects, the area can get rid of the poor situation and go on in a sound way ; to improve the traffic condition in order to increase quantity of substance, finance, information et al. ; to industrialize agriculture depending on the advantages of climatic resources ; to reform the traditional technology and develop infant industry, actively to form optimum industrial structure and increase the quality of production ; to pay more attention to environmental problems, especially harness and control industrial pollution, conserve natural resources and protect soil

首先是全區脫貧，並且與提高人口素質相結合，只有二者結合起來，才能真正實現脫貧治富：加強交通網路的建設，以提高區域內外物質、信息、資金和人員等的流通；在發展本區優勢作物的基礎上，實行農業產業化經營，以公司（企業）十農戶型模式和主導產業型模式發展新型農業；對傳統產業進行創新升級，繼續大力發展「糖、茶、電」 ，同時積極培育新興產業，搞好民族文化旅遊，以求提高全區產業的整體水平：重視生態環境問題，以工業污染的治理和農業水土流失防治為重點。

The method for retaining sampled units in successive sampling survey for changed probability of selection is introduced. for pps sampling design, a model - design unbiased predictor for the total of a variable for the target population is proposed, and the optimum matching ratio for the predictor under the assumption of unchanged population is calculated. for rhc sampling design, the equation that the optimum matching ration satisfies is given

介紹了連續抽樣中概率發生變化時保留樣本的方法。對于有放回的pps抽樣，在假設的超總體模型之下提出了總體變量總值的模型設計無偏預報量，並計算了總體不變時保留樣本的最優匹配比。對于無放回的rhc抽樣，給出了最優匹配比滿足的方程。

Study of sustainable development optimum consumption of population and saving resource in production

可持續發展研究論消費適度與資源節約毛鋒等

Urbanization of farmers in northeast china can fundamentally relieve contradiction of population and land, be beneficial to most optimum distribution of land resources, make land resources advantageous change into agriculture economic advantage, improve the land ecological environment in the area of fragile organism

東北地區農民市民化能夠從根本上緩解人地關系矛盾，有利於土地資源優化配置，促進土地資源優勢轉化為農業經濟效益優勢，改善生態脆弱地區的土地生態環境。

In this paper, an improved genetic algorithm ( ga ) was applied to the design of high performance e - plane waveguide filters at the first time. for dealing with the shortcoming of ga as low efficiency in local optimum searching, the idea based on parallel genetic algorithm ( pga ) known as separate local optimization was presented. by separating the whole population into sub - populations, and adding a new operator known as crossover between two sub - population, the new method can provide as 2 3 times quickly as traditional ga. all numerical examinations illustrated the high convergence speed and good global searching of the new algorithm, and proved the validity of it

由於遺傳演算法表現出良好的全局搜索性能，因此本文將其應用於高性能e面波導濾波器的設計中.針對傳統遺傳演算法所存在的局部搜索能力差的缺點，本文在并行遺傳演算法的基礎上，通過將原有群體劃分為多個子群體，利用多個子群進行局部極值點的搜索，並利用群間遷徙，使改進后的演算法收斂速度平均提高了2 3倍.數值實驗表明演算法具有較快的收斂速度和較好的全局搜索性能，證明了演算法的有效性