population structure 中文意思是什麼

population structure 解釋
人口構成
  • population : n. 1. 人口；人口總數；全體居民；人口的聚居。2. 物的全體[總數]；【生物學】蟲口；種群（量）；群體；族，組，個數；【統計學】對象總體，全域。3. 【物理學】布居；密度。4. 〈罕用語〉殖民。
  • structure : n. 1. 構造，結構；組織；石理，石紋。2. 建造物。3. 【化學】化學結構。4. 【心理學】（直接經驗中顯現的）結構性，整體性；整體結構。adj. -d ,-less adj.
  1. The reproductive characteristics and population structure of artemisia ordosica, hedysantm scoparium, caragana korshinskii and the reproductive characteristics of annual plants eragrostis poaeoides and bassia dasyphylla were observed in shapotou artificial revegetation area. stability of the artificial vegetation was appraised from the views of its persistence and variability under local natural condition. the study showed that : the artificial - natural vegetation built with sandbreaks and plants is stable in shapotou area

    通過對沙坡頭人工固沙植被區主要建植種群檸條（ caraganakorshinskii ） 、花棒（ hedysarumscoparium ）和油蒿（ artemisiaordosica ）的繁殖特性及種群結構的研究，以及自然侵入的一年生草本植物小畫眉草（ eragrostispoaeoides ）和霧冰藜（ bassiadasyphylla ）繁殖特性的研究，探討了在植被的持久性和變異性，分析評價了主要受惡劣環境壓力下的人工固沙區植被的穩定性。
  2. Based on the relationship between the population and economic development, this thesis refers to the demographic analysis on affecting the development of circular economy and indicates that adapting the population development to the economy can result in the circular economy development and sustainable development by controlling the population quantity, improving the population quality, optimizing the population structure and accelerating the urbanization process

    本文以人口與經濟發展的關系為基礎，對影響循環經濟發展的人口因素進行分析，指出控制人口數量，提高人口素質，優化人口結構，加快人口城市化進程，使人口發展與經濟發展相適應，才能促進循環經濟發展，最終實現可持續發展的目標。
  3. Study on the population structure of northeast hare lepus mands huricus radde from eye lens weight dividing age group

    用晶體質量劃分年齡組調查東北兔的種群組成
  4. Population structure and spatial distribution pattern of ammopiptanthus mongolicus in dengkou county, inner mongolia autonomous region

    磴口縣沙冬青種群結構和空間分佈格局的研究
  5. The paper summarizes the latest research advances in chimonanthus praecox ( l. ) link community ecology in terms of community distribution and environment, flora composition, appearance and structure, population structure, and physiological and ecological factors, points out some currently - existing research problems, and puts forwards some research priorities and orientations

    摘要本文從群落分佈與群落環境，區系組成、外貌和結構，種群結構及生理生態學等方面綜述了蠟梅群落生態學研究的最新進展，指出了現今研究中存在的一些問題，提出了今後研究的若干重點領域和方向。
  6. Although in recent years, china ' s population structure has changed into " three lows " complexion of low birth rate, low natural growth rate and low mortality rate thanks to china ' s unremitting efforts to carry out the family planning policy, a high growth is concomitant with the low birth rate

    雖然近年來，由於計劃生育政策的持續不懈努力，中國人口結構已轉變成低出生率、低自然增長率、低死亡率的"三低"局面，但與低出生率相伴生的，卻是高增長量。
  7. On the hengyang population structure and sustainable development

    論衡陽市人口結構與可持續發展
  8. This study deals with butterfly diversity and assessing endangered species in natural reserve of baishuijiang in gansu province. the research includes field investigation, observation at certain time and places, captive breeding in experimental area, capture - recapture etc. the biology of four important butterfly species is studied, especially focusing on the natural population life table, habitats, population structure and mobility of byasa impediens. the population developing trend and key factor that result population decline and fluctuation of troides aeacus and byasa impediens are analysed

    本文在甘肅白水江自然保護區碧峰溝通過野外調查、定點定時觀察、實驗地飼養、標記重捕等方法研究了碧峰溝的蝶類多樣性並進行了局部瀕危評估；研究了四種重要蝶類的生物學特性；對長尾麝鳳蝶的生境、自然種群生命表、種群結構、種群移動性進行了深入研究，並估測了各種種群參數，分析了種群發展趨勢。
  9. The second population structure is the best environment but the third one is the worst in three population

    其中，是荷葉鐵線蕨生長的最佳生境，是最差的。
  10. From the viewpoint of the interactive relationship between modern pension scheme and productivity, this paper observed the function and prospect of occupational pensions in china within a background consisting of population structure, labor productivity, and finance environment, utilized simulation and scenario analysis in actuarial models to estimate and analyze the effect of occupational pensions in the replacement rate of urban retired employees, then pointed out the magnification effect of occupational pensions in increasing the replacement rate and the higher efficiency in improving retirement income of urban retired employees. it also predicted the size expectation of occupational pensions during 2002 - 2010 in china, described the function of occupational pensions in developing the capital market and improving the labor productivity, especially emphasized the higher probability of occupational pensions to play the role of institutional investors compared with basic pension. in short, this paper proved the positive meaning of developing occupational pensions from micro - level and macro - level respectively, and brought forward corresponding policy suggestions

    本文立足於現代社會養老保險制度與生產力之間的互動關系這一視角，把對我國企業年金作用與發展空間的考察置於包括人口結構、勞動生產率、金融環境等諸多因素的經濟大背景下，在精算模型中運用模擬（ simulation ）和情景分析方法，對企業年金對我國退休職工養老保險收入替代率的影響進行了定量分析和預測，指出了企業年金在提高退休職工收入替代率方面的放大作用，以及比基本養老保險在提高退休職工收入方面的更高效率；並對我國企業年金2002年- 2010年的預計發展規模做了預測，闡述了企業年金對我國發展資本市場和提高勞動生產率的意義，著重指出了企業年金較之基本養老保險基金充當資本市場機構投資者的更大可能性。
  11. Difference in basic population structure of the ethnic groups in kazakhstan

    哈薩克斯坦不同民族在人口基本結構方面的差異
  12. Abstract : biological invasions are a continuous feature of a non - equilibrium world, ever more so as a result of accidental and deliberate introductions by mankind. while many of these introductions are apparently harmless, others have significant consequences for organisms native to the invaded range, and entire communities may be affected. here we provide a survey of common models of range expansion, and outline the consequences these models have for patterns in genetic diversity and population structure. we describe how patterns of genetic diversity at a range of markers can be used to infer invasion routes, and to reveal the roles of selection and drift in shaping population genetic patterns that accompany range expansion. we summarise a growing range of population genetic techniques that allow large changes in population size ( bottlenecks and population expansions ) to be inferred over a range of timescales. finally, we illustrate some of the approaches described using data for a suite of invasions by oak gallwasps ( hymenoptera, cynipidae, cynipini ) in europe. we show that over timescales ranging from 500 10000 years, allele frequency data for polymorphic allozymes reveal ( a ) a consistent loss of genetic diversity along invasion routes, confirming the role of glacial refugia as centres of genetic diversity over these timescales, and ( b ) that populations in the invaded range are more subdivided genetically than those in the native range of each species. this spatial variation in population structure may be the result of variation in the patchiness of resources exploited by gallwasps, particularly host oak plants

    文摘:生物入侵是不均衡世界的一個永恆話題，尤其是當人類有意或無意地引入物種后.很多引入顯然是無害的，但另外一些則有著嚴重的後果，會給入侵地的生物以至於整個生物群落造成影響.本文總結了分佈區擴張的常見模式，概述了它們對遺傳多樣性和種群結構式樣所造成的影響.描述了如何根據以一批遺傳標記所得到的遺傳多樣性式樣來推斷入侵途徑，來揭示伴隨擴張選擇和漂變在形成種群遺傳樣式中的作用.本文對日益增多的群體遺傳學方法進行了總結，這些技術可以用來在不同的時間尺度上推斷種群規模所發生的巨大變化（瓶頸效應及種群擴張） .最後，我們以歐洲櫟癭蜂（膜翅目，癭蜂科，癭蜂族）一系列入侵的數據為例對一些方法進行了說明.從500 10000年的時間尺度上，多態的等位酶位點上等位基因頻率的數據表明: 1 ）遺傳多樣性沿入侵路線呈不斷下降的趨勢，支持了冰河期避難所作為遺傳多樣性中心的作用; 2 ）入侵地區的種群與該物種原產地的種群相比，遺傳上的分化更為強烈.這種種群結構在空間上的變異可能是被櫟癭蜂開發的資源尤其是櫟樹寄主在斑塊上出現變異的反映
  13. It is required to maintain good single - plant morphology to form a rational population structure

    必須保持單株形態以創造合理群體結構。
  14. The first one involves the following steps : first, inference of the main dynamical factors which influence house price from both the theoretical and empirical angles ; second, analysis of the results of the empirical study on the house price model ; and third, presentation of the six major dynamical factors, namely, income, interest rate, credit reliability, tax structure, house supply and population structure

    從長期來看，隨著經濟發展和居民生活水平的提高，影響住宅建安綜合費用因素的價格也不斷上漲，如人工工資、建築材料價格都在不斷上漲，還有住宅建設標準也不斷提高。因此，就長期而言，住宅建安綜合費用仍是住宅價格的重要動力因素之一。
  15. We div ided it into four harmful regions of rodents according to the composition of the rodent species and population structure and provided some necessary foundation for preventing and eliminating rodents

    我們根據鼠群的種類組成及其結構狀況，將其劃分為四個不同的鼠類危害區，為防鼠滅鼠工作提供了一些必要的依據。
  16. A preliminary study on population structure of cathaya argyrophyella in dashahe nature reserve of guizhou

    貴州大沙河自然保護區銀杉種群結構初步研究
  17. Population structure and regeneration types of dominant species in an evergreen broadleaved forest in tiantong national forest park, zhejiang province, eastern china

    浙江天童國家森林公園常綠闊葉林主要組成種的種群結構及更新類型
  18. First the author estimates the current situation of population aging in china ; then, analyzes and forecasts the degree of population aging and population structure in the period of 2001 - 2050 in china, calculates the standard coefficient of retirements income in china according to the theoretic methods provided by the author ' s research, estimating the path of the ratio of chinese social security fund to gdp. in the end the author gives some policy recommendation based on the research

    首先是對中國老齡化現狀的分析；其次是對中國2001 - 2050年的老齡化及人口結構變動趨勢進行分析與預測；再次是依據本文研究出的理論對中國養老標準系數臨界點的測算；第四是對中國社會保障資金與gdp之比的未來增長路徑進行了數理推導，並進行實際測算；最後給出基於本文研究成果基礎上的相關政策建議。
  19. The population structure is typical metapopulation ( source - sink population ) with nine patches. the patch of west gully and shanwang - temple gully is the source population and the population in these patches is a dynamic process from extinction to reclonizition

    種群結構為典型的異質種群，且為源-匯種群，共有九個斑塊，山王廟、西溝斑塊為最大的源種群斑塊。
  20. Thereinto, population geography includes population distribution, population quality as well as population structure, and gis contains spatial analysis as well as space visualization

    人口地理學基本理論分為人口地域分佈、人口素質和人口結構三部分內容，地理信息系統原理則從空間分析和空間可視化模擬技術兩方面展開論述。
分享友人
分享到 Line

分享到臉書