population trend 中文意思是什麼

population trend 解釋
人口結構和人口數量的變化動向
  • 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。
  • trend : n （路、河、海岸、山脈等的）走向；方向，方位；傾向，趨勢，動向。 the trend of events 形勢。vi 走...
  1. The method of modified simplex was applied to optimize the models, and the fitting results show that liu - logistic model was more suitable than logistic model to the actual growth trend of form. taxus chinensis var. mairei population, and the highest growth rate of basal area was the tenth age class, namely the phase when breast diameter was 68 ~ 76 cm

    以胸高斷面積代替種群生物量，分別採用logistic常規模型及劉金福提出的logistic改進模型對南方紅豆杉種群的增長動態進行研究，運用改進單純形法對模型進行優化，擬合結果表明改進模型比logistic常規模型更符合南方紅豆杉種群的增長趨勢，南方紅豆杉種群的最大增長速度出現在第10齡級，即胸徑為68 76cm時期。
  2. By making some assumptions, collision frequency were presented. then the the flocculation kinetics model was established through population balance equation. comparison of experimental data and modeling results indicate that there are the same trend between the two. so the model can predict floes number and size during flocculation of yellow river ' s loess particles without using empirical parameters. the tem and sem were used to obsever floes in the study of floe structure. the flocculation was divided as flocculi, floc and floe aggregate. the floes structure model was established by assumption that particles position in floe accords with tetrahedron. the fractal dimension of model and experimental floes was found to be coincidentso the model can reflect the structure of flocs formed in flocculation of yellow river ' s loess particles by macromolecule flocculant at a certain extent

    最後，本文還對絮凝動力學和絮體結構進行了研究，在前人研究的基礎上，針對高分子絮凝黃河泥沙，對絮凝過程作了一些符合試驗條件的假設，建立了顆粒碰撞頻率表達式，應用了顆粒數量平衡方程，從而建立了絮凝過程的動力學生長模型，模型計算結果與試驗數據對比表明，二者趨勢一致，在沒有使用經驗參數的情況下基本上能夠描述黃河泥沙絮凝過程中絮體數量和尺寸分佈的變化過程；對絮體結構的研究中，應用掃描電子顯微鏡和透射電子顯微鏡對絮體進行了觀察，將絮體分為絮粒、絮團和絮網三個不同的生長階段，通過假設顆粒結合位置符西安建築科技大學博士學位論文合正四面體，建立了絮體結構模型，計算得到的模型絮體分形維數基本與試驗中的實際絮體相符，在一定程度上能夠反映高分子絮凝黃河泥沙生成的絮體結構。
  3. 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。
  4. As to the planning and development of " retirement communities " this could be a rising trend in the mainland for some hong kongers, which we need to examine as part of the issue on mobile population

    在退休社區的規劃及發展方面，由於本港部分人士退休后移居國內的趨勢涌現，我們必須留意其發展情況。有關研究見流動人口課題。
  5. At last, the thesis have researched urbanization trend from these aspects of migration of population, change of population density, layer distribution of urbanization as well as development and division of satellite towns

    最後文章從人口遷移、人口密度變化、城市化圈層分佈和衛星城鎮的發展及分工等方面對人口城市化趨勢進行了探討。
  6. With the exception of 1985, there was a prevailing trend of depopulation since 1967, until a net population increase was seen for the first time in twelve years in 1997

    除1985年外，自1967年以來，人口普遍呈下降趨勢，直到12年後的1997年，人口才有所增長。
  7. By analyzing the effect of dry fanning on grain production and the trend of population growth, this paper recommends the walking - type irrigation technique, which is practical and suitable for the situation in various regions of our country, to solve the problems of not being able to sow seeds timely and keeping a full stand of seedlings, so that we can guarantee the national grain production and provision

    摘要通過分析旱地農業對糧食生產的影響及人口增長趨勢，提出採用適合我國基本國情和各地實際情況的、實用的行走式節水灌溉技術，解決因乾旱無法適時播種和保苗這一長期困擾農民的「卡脖子旱」問題，從而保障糧食生產，保障國家糧食供給。
  8. Along with the prevalence of type 2 diabetes and the trend of population senility worldwide, the mechanism of insulin hyposecretion and insulin resistance to type 2 diabetes has become the focus of world

    摘要隨著世界范圍內2型糖尿病的流行與人口老齡化，以胰島素分泌不足和伴胰島素抵抗為主要致病機制的2型糖尿病已成為國內外研究熱點。
  9. In fact the development course of the town agglomeration is the course of industrialization promoting urbanization. the urbanization is a complicated course, and if china wants to realize the assignment of urbanization, the only promotion by the tertiary industry is inadequate, we still must quicken the development of industry, the population concentrating to the town, and industry to the zone are the trend of economic development, and the industry zone which must be characteristic, can be in the invincible position in the intense competition of market

    城鎮群的發展過程實際上是工業化推動城鎮化的過程，城鎮化過程是一個復雜的過程，中國人口眾多，要想實現城鎮化的任務，僅靠第三產業的推動是不夠的，還必須加快工業的發展，而人口向城鎮集中，工業向園區集中是經濟發展的趨勢，工業園區必須具有特色，才能在市場的激烈競爭中立於不敗之地。
  10. 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。
  11. In chapter 2, an economic concept - location quotients ( lq ) is introduced into the mathematical part of this article, in order to isolate what a city does well, and to find which of its industries export to the rest of the nation. author manipulates last five years " lq from data on farming, forestry, animal husbandry, coal, rude oil, tourism, export and import, population and etc, argues that we could know weather there is a larger than normal concentration of activity in the region, and weather there is a trend of regular develop trace of this activity by running a time series simple autoregression, which provides a feasible analysis tool for people to judge and choose an advantageous industry within this region

    第二章，採用區位商的方式和賦予的經濟意義，通過計算，比較了過去5年中甘肅、寧夏兩省區在農業、林業、畜牧業、漁業、煤炭、原油、旅遊、進出口、人口等與資源產業密切相關的行業的區位商，並提出通過對所獲得的區位商數據建立有序的單變量時間序列回歸模型，可以獲知某項資源產業是否在該省具有明顯的優勢的計量方法，為判斷並選擇區域性的優勢產業提供了一種可行的分析工具。
  12. The paper is divided into three sector : in the first sector, base on cohort - component method and via quantitative analysis and qualitative analysis to matter of fact, the paper imports several variable : accelerating function of survival rate, correct children women ratio, proportion of infants, and establish correct cohort - component method. in the second sector, base on several hypothesis, zhejiang province population forecasts are made by correct cohort - component method, and population composing are presented in the future. in the third sector, base on results of zhejiang province population forecasts, the paper discusses change trend of mainly population index in the 21 century, and analyzes how population trend effects development of society and economy

    本文分三部分進行：第一部分，在隊列要素法的基礎上，通過對實際情況的定量分析與定性分析，在模型中引入了以下變量：生存概率加速函數、修正兒童婦女比、幼兒性別比，建立了修正隊列要素法模型；第二部分，在幾個重要假設的基礎上，根據修正隊列要素法進行浙江省未來五十年人口預測，給出了各預測年份分性別年齡的人口構成情況；第三部分，是在上述預測結果的基礎上，對21世紀前半葉浙江省的主要人口指標的變化趨勢進行討論，並對浙江省的總的人口變動趨勢及其對社會經濟發展影響進行分析。
  13. The administrative obligatory distribution mechanism of rural land has lead to the serious trend that peasants hold land equally according to the member right of rural collective, and has stimulated the rapid growth of rural population, in turn, the growth has brought down the ration of peasant and land

    這種帶有行政強制性的農地分配機制產生了「村社集體成員權」平均?有土地的嚴重傾向，直接刺激了農村人口快速增長；反過來，人口增長又降低了農民的人地比率。
  14. In possible cost, overloading is in all the counties. 6 the research analyses the status and trend of human - land relationship in the zone. countermeasures to control the relationship conclude : family planning to control population ; consolidating education for population diathesis ; intensifying realize to generalize science and technology ; adding agriculture cost ; more vegetation to control desertification

    6協調人地關系，提高區域人口承載力的主要對策是:實行計劃生育，嚴格控制人口增長;大力發展教育，提高人口素質;強化科技意識，推廣先進技術;增加投入，提高土地生產能力:提高植被覆蓋度，控制土地荒漠化，改善生產環境。
  15. This article is divided into five parts totally, explaining the special relationship between palestine and jordan from the aspect of economy, military and population etc. in the fist part, origin of jordanian - palestinian relations is been discussed ; in the second part, i expatiate upon the development of the jordanian - palestinian relations from 1967 to the late of 1970s, and generalize that the character in this period is cooperation and conflict ; some important history events are expounded in the third part, such as the camp david agreement, the lebanon war, the reagan plan, the jordanian - plo agreement and the palestinian intifada. at the same time, the conclusion can be drawn that the relationship between the plo and the jordanian government was characterized by instability, mutual mistrust, caution and rivalry ; in the fourth part, after the end of the cold war, both jordan and plo adopted practical policies, and then the relationship of equal colleague has become the main trend ; in the last part, i summar ize the predominant factors which influence the relationship between jordan and palestine and give history outlook to the future jordanian - palestinian relations

    第一部分，重點闡述約巴特殊關系形成的歷史淵源；第二部分，採用對比的手法，通過對1967年70年代末約旦與巴解組織之間關系演變的歷史考察，深刻揭示出在這一時期約巴關系的特點是短暫合作和長久沖突；第三部分，通過對戴維營協議、黎巴嫩戰爭、里根方案、約巴協議聯合行動方案、巴勒斯坦大起義等重大歷史事件分析，闡釋約巴關系親密接觸和悲歡離合的內在原因，推論出80年代的約巴關系具有不穩定、不信任、謹慎、競爭甚至反復等特點；第四部分，冷戰結束后，政治解決地區沖突已成為地區局勢發展中的一股主流，約巴雙方都採取了新的務實政策，平等友好關系是約巴關系發展的主流；第五部分，這是全文的落腳點，總結制約和影響約巴關系主導因素，並且展望未來。
  16. The trend was most dire in sub - saharan africa, where the population in extreme poverty leaped from 227 million to 313 million

    這個趨勢在非洲撒哈拉沙漠以南地區尤其嚴重，赤貧人口從2億2700萬人激增為3億1300萬人。
  17. A neural - network based forecast for aging population trend in china

    基於神經網路的我國人口老齡化趨勢預測
  18. The the generation survival rate, fecundity and population trend index attained their respective maximun values at 26. in the tested temperature range, both intrinsic rate of increase ( rm ) and finite rate of

    在5個溫度條件下，內稟增長力（ rm ）和周限增長速率（ ）均隨溫度的升高而增大，至34時最大，分別為0 . 175和1 . 191 。
  19. " the needs of the elderly and providing for secure, happy senior years are concerns for all of us as hong kong faces an aging population trend

    劉氏補充：本港人口逐漸老化，長者的需要及退休后的生活保障更受各界人士關注。
  20. Why they have chosen to live in the mainland, the reasons and frequency of returning to hong kong and their aspirations for facility provision, etc. we will also further explore whether our planning standards need amendments, in terms of the provision of various community facilities, in response to the mobile population trend

    為了解本港市民在珠江三角洲居留的情形及其對內地生活的期望，我們在珠江三角洲己展開問卷調查。我們亦將進一步研究是否需要修訂有關提供社區設施的規劃標準，以應付日趨流動的人口。
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