level population 中文意思是什麼

In the present study, aflp ( amplified fragment length polymorphism ) markers was used to examine population of abies yuanbaoshanensis in order to understand the level of population genetic variation and genetic structure. the result would help to evaluate its evolutionary potentiality and the degree of being endangered and could provide scientific basis for making right protection strategy. high - quality dna was extracted using ctab method from those tender leaves of forty - three fully - developed trees in population abies yuanbaoshanensis

本研究選用一種高效的檢測遺傳變異的分子標記? ? aflp技術來分析元寶山冷杉種群的遺傳多樣性，旨在了解該種群在分佈區內的遺傳變異水平和遺傳結構情況；研究結果將有助於更清楚地認識這一瀕危類群的生存潛力和瀕危程度，而且可以為制定何種挽救和保護措施提供科學的依據。

Surveillance on immunity level of dpt for health population in taiyuan city

太原市健康人群百白破免疫水平監測報告

The islands, lying between the antarctic and subtropical convergences and the seas, have a high level of productivity, biodiversity, wildlife population densities and endemism among birds, plants and invertebrates

這些島嶼位於南極和亞熱帶之間的海域，具有富饒的資源和多種多樣的生物，包括野生動植物，特殊的鳥類，植物以及無脊椎動物。

The thesis is based on income question, forest coverage rate and grop production. to beging with, date envelopment analysis is proved that it can be applicated into grain for green in shan - bei district, and then in view of the fact, seven esential factors which have influence on the project are found out : expense of dam, expense of crop, expense of cash tree, expense of defense tree, other economic crop, expense of grass and graziery ; and the output factors include : income of gdp, pure income per captia, the area of decreasing land loss, graziery income, crop production, income of tree, the totle income of economic crop. after the date of each facts are puted into dea model, unefficiencial decision making units ( dmu ) found. the data that are got through adjusting unefficiencial dmus dy dea can offer guide in shanbei district upgrading of an industrial structure. at the same time, taking into account some possible problems in or after grain for green in shan - bei district, the thesis bring out some propesal to improve the circ umstance, enhance the life level and put the relation of population, resource and circumstance into a healthy orbit

因此，加快退耕還林還草，調整土地利用結構和產業結構，已成為實現山川秀美工程和可持續發展戰略的必經之路。論文以解決陜北地區的收入問題，植被問題以及糧食產量問題為出發點，首先從理論上分析了包絡分析方法在陜北地區退耕還林（草）中運用的可行性，然後結合陜北地區目前的實際情況，綜合分析出影響陜北地區退耕還林（草）的關鍵的七個因素作為輸入指標：水利水保設施投入，農作物投入，經濟林種支出，防護林支出，其它經濟作物，草類支出，畜牧業投入；以退耕還林所要解決的最終問題作為輸出指標： gdp收入、農民人均純收入、水土流失減少量、牧業總產值、糧食產量、林業總產值、其他經濟作物總產值。將各指標所對應的數據代入模型后，通過分析求解得出非有效的決策單元，再運用包絡分析方法的一些基本原理對非有效的決策單元進行調整，由此所得的數據對陜北地區的實際投入具有很好的指導意義。

The deep traditional birth culture is supporting our country agriculture society ' s high birth level, this has been to the certain positive role in the history, but the huge population quantity more and more becomes the cloth wrapper which our country economic society develops

深厚的傳統生育文化支持著我國農業社會的高生育水平，這在歷史上起到過一定的積極作用，但是龐大的人口數量越來越成為我國經濟社會發展的包袱。

The uprising of water level will immerge the water supply installation of some towns, which cause some bad effects to present water supply system. meanwhile, with the implementation of the big development of the west china, the acceleration of social development and city construction, increase of the population, adjustment of economy framework, improvement of living level of, the quality and the quantity of urban water supply will increase greatly

然而，隨著我國西部大開發戰略的實施，重慶市經濟和社會發展及城鎮建設的提速，三峽庫區移民城鎮的遷建，三峽庫區重慶段城鎮體系結構的完善，城鎮化進程加快，城鎮人口猛增；隨著經濟結構的調整，社會事業的發展，人民生活水平不斷提高，健康衛生意識增強和生活方式得以改善。

It may be necessary to resort to adulticides when larvicide application cannot provide adequate and satisfactory control and the mosquito population reaches an annoying level and there is a threat of mosquito - borne diseases

若使用滅蚊幼蟲劑不足以控制蚊患，而蚊子數量又達到非常滋擾的程度及

We constructed fences using 2 x 2 x 2 factorial design to examine the effect patterns of food availability, predation and interspecific competition on population dynamics and spatial behavior of reed voles, microtusfortis. we expected to test two hypothesises : ( 1 ) availability of high quality food, predation and interspecific competition have independent and addictive effects on population system dynamics for small mammalia herbivore ; ( 2 ) availabiliry of high quality food could reduce home range and aggressive behavior level between individuals of microtine, predation and interspecific competition have independent effects on spatial behavior of microtine

以2 2 2析因實驗設計，在野外圍欄條件下，探討食物可利用性、捕食及種間競爭對沼澤田鼠（ microtusfortis ）種群動態及空間行為的作用，旨在檢驗下述特定假設： （ 1 ）高質量的食物可利用性、捕食及種間競爭對植食性小哺乳動物種群系統動態具有獨立的和累加的效應； （ 2 ）高質量的食物可利用性可降低田鼠個體間的攻擊行為水平，並導致其巢區減小；捕食與種間競爭對田鼠的空間行為亦有獨立的作用。

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。

The trend is refered to combine the evidence from several genes representing both nuclear and organella genomes with morphology, ontogeny and life history for systematic studies ; while studies at the population level by applying molecular techniques with high differenciation lead an important direction

指出同時應用能夠代表核和細胞器基因組的多個基因結合形態、個體發育和生活史進行系統學分析是其必然發展趨勢；而應用高解析度的分子手段進行居群研究是一個重要的發展方向。

Second, the population genetic structure and genetic diversity of e. mollis were studied by using allozyme eletrophoresis and the electrophoretic data for 6 loci from 3 populations being xiangning, yicheng and pinglu populations in shanxi were got. the level of polymorphism was relatively higher than that of the insect - pollinated outcrossing species ( he = 0. 375 )

用等位酶電泳法和biosys - 2軟體對山西翅果油樹種群的遺傳結構和遺傳多樣性進行了研究，通過對3個種群的6個等位酶位點的電泳分析，結果表明： 5個位點為多態位點， 1個單態位點。

Although there are a lot of land in our country, there are less plowland for a large amount of population. the average plowland area is just one fourth of world average level

我國雖然地域廣闊，但是耕地量少，人口眾多，人均耕地僅相當於世界平均水平的四分之一。

Submersed land area including different utilizing type by sea water are calculated and the potential economic loss and population affected by the submerged disaster are assessed for no defence ， different sea - level rise and high water level. furthermore, special topic maps of fatalness of sea level rise, vulnerability of land system, socio - economic and ecological vulnerability, and defending ability are produced. the following results are combined with the basic study cell based on area source model following mathematical models of risk evaluation, considered of defence or no defence

運用海平面上升災害危險性、土地系統易損性、社會生態經濟易損性和抗災能力的數學模型，在mapinfo軟體下運行，得到該區上述四種評估因子的專題圖；並分別按照考慮抗災能力以及不考慮抗災能力兩種情況，用海平面上升災害風險評估模型融合各因子，得到遼河三角洲（盤錦市）海平面上升災害綜合風險評估圖。

The current subsistence level income standard is now only 20 per cent of the rural population ' s average yearly income of 3, 255 yuan

目前的收入補助水平線僅僅是農村人口平均年收入3225元的百分之二十。

On the premise of stabilizing a low fertility level, china will achieve a gradual transition from a low population growth rate to zero growth, and the total population, after reaching its peak figure, will slowly decrease

在穩定低生育水平的前提下，中國人口將由低增長逐步過渡到零增長，人口總量達到峰值后開始緩慢下降。

China possesses of 22 percent of world population, but it only enjoys 6 percent of world water resource. there are above 400 cities shorting water in 668 cities of china. in order to satisfy increasing demand to water supply, some city blindly overexploits groundwater, which results in regional water level descending and induces ground sedimentation and crack geologic disaster

中國擁有世界22的人口卻只享有世界6的水資源，全國668個城市中，有400多個缺水，為了滿足日益增長的供水需求，一些城市盲目超采地下水，導致水位下降、地面下沉、海水倒灌，進而污染了地下水。

A co2 laser with the optimized resonator is made and to be proved by experiments. this dissertation focus on the following problems : the kinetics process of the cvl and the co2 laser, the rate equations for the laser level population, electron temperature and electron density

本文的重點是：闡述清楚銅蒸汽激光和二氧化碳激光的動力學過程，定量描述激光能級的粒子數速率方程、電子溫度和電子密度等速率方程

Policies are framed to limit to an acceptable level population growth through immigration, and to control the entry of foreign workers

本處的政策旨在限制移居本港的人數，使所導致的人口增長維持在可接受的水平，並對輸入外地勞工施行管制。

Policies are framed to limit to an acceptable level population growth through immigration, and to control the entry of foreign workers. immigration procedures for hong kong residents, tourists and businessmen are streamlined

本處的政策旨在限制移居本港的人數，使所導致的人口增長維持在可接受的水平，並對輸入外地勞工施行管制。

The indicators system involes seven subsystems, economical level 、 population and employment 、 resources and environment 、 technology and education 、 culture and health, quality of life, social security and safeguard subsystem. then took globle principal component analysis, composite index analysis and clustering analysis as tools in empirical study. this aimed at enriching the content of the comprehensive evaluation indicators system of the social development level ; made it porttay that the social development level of sichuan

社會發展水平研究方法，本文採用描述統計法、加權指數法、全局主成分分析方法和聚類分析方法相結合的方法。本文的資料來源於四川省統計局的抽樣調查，選取了四川省1999 ? 2004年社會發展水平數據、四川省各市州2003年、 2004年兩年的社會發展水平數據。