environmental variation 中文意思是什麼

environmental variation 解釋
環境變異
  • environmental : adj. 1. 環境的，環境產生的。2. 環境藝術的。adv. -ly
  • variation : n 1 變化，變動。2 變量，變度，偏差。3 【語言】語尾變化；變體，異體；【數學】變分，協變；順列；【...
  1. The accuracy of 3 - d surface - shape measurement by phase - measuring profilometry ( pmp ) is greatly influenced, because the variation of environmental light leads to biggish error

    摘要在運用相位測量剖面術（ pmp ）對物體進行三維面形測量時，由於測量現場環境光強變化而引入較大誤差，嚴重影響測量精度。
  2. Tree ring is a kind of natural archives, on which the isotopic analysis is important to study global climate and environmental change. the authors mainly provide a comprehensive introduction to the fractionation models of carbon, hydrogen and oxygen isotope in plants, their research techniques and the extract methods from cellulose. that results show isotopic tracer can record the message of climatic variation and has become a powerful tool for paleoclimate reconstruction and for the modern environment changing research. especially studying on pages, the cellulose isotopic analyses of imbedded old tree ring have become the mainly quantitative means of environmental evolvement. in addition, china is a typical monsoon country, research in tree ring stable isotope seasonal variation can give us a lot of important information on that. up to now, the research techniques and works on tree ring in our country are still in its earlier stage, and remain many limitations. it needs further accumulate basic research materials, intensify regional contrast and intercross studies on relative subjects

    尤其是在過去全球變化pages研究中，埋藏古木纖維素中的碳氫氧同位素分析已成為環境演化研究的主要量化手段。另外，對于中國這樣典型的季風氣候國家，開展樹輪穩定同位素隨季節性變化的研究具有重要的意義。我國在樹輪研究方面起步較晚，研究方法和研究內容上也比較簡單，還存在不小差距，既要進一步積累基礎資料，又要做區域對比，加強與相關學科的交叉研究。
  3. Diurnal variation of transpiration rate of carex meyeriana and its relationship with environmental factors under different water conditions

    不同積水處理下烏拉苔草蒸騰速率日變化及其與環境因子的關系
  4. Effects of vallisneria asiatica on water environmental factors and its diurnal variation

    苦草對水中環境因子影響的日變化特徵
  5. Variation in population characteristics across a geographical area ; may be related to environmental gradients or may have no functional significance

    族群特性在穿越一個地理區不同的地理環境之間之變異性。
  6. Twenty f1 combinations crossed among 5 varieties and strains different in fiber properties according to complete diallel crossing design were used to evaluate the heterosis and gene action of boll weight and lint percentage in high quality fiber property varieties in upland cotton in 1998 1999 for two year successively at nanjing. it was indicated that there existed small interactions with the environmental factors without maternal effects and the additive gene effect was in chief, attaining to 51. 2 % and 65. 4 % respectively for boll weight and lint percentage. the dominant effect was also in higher rate, 32. 6 % and 16. 8 % respectively. the population mean heterosis of boll weight and lint percentage over the mid - parental mean were relatively prominent 13. 3 % and 3. 5 % respectively in extreme significance. however, boll weight showed no significantly surpassing parental f1 heterosis over the better parent based on population mean ( 2. 0 % ) ; while the lint percentage expressed significant negative heterosis value ( - 2. 1 % ). the gene actions were in conformity with the heterosis expression. it was shown clearly that the f1 combinations crossed between parents with similar performances had relatively high dominant effects and significant positive f1 surpassing parental heterosis ( f1 heterosis over the better parent ) ; while no f1 combination crossed between the parents with prominent mutual difference surpassed the higher parent in yield components, which indicated that among those parents with less difference and close relationships, there still existed sufficient genetic variation or certain mechanism for creating variation and achieving greater advances in breeding. correlation analyses also indicated that there still existed severely undesirable negative correlation between yield and fiber properties as well as the difficulties for their simultaneous improvements

    利用5個具有不同纖維品質性狀的品種（系）配製完全雙列雜交組合20個，通過親本和f1的2年隨機區組試驗發現產量性狀的鈴重和衣分與環境的互作效應小，不存在母體效應，並以加性遺傳效應為主，分別占表型方差的51 . 2 %和65 . 4 % ;顯性遺傳效應所佔的比率也較高，分別為32 . 6 %和16 . 8 % .鈴重和衣分的群體平均優勢較大，分別為13 . 3 %和3 . 5 % ，達到了極顯著;鈴重的超親優勢為2 . 0 % ，不顯著;衣分為顯著的負值（ - 2 . 1 % ） .遺傳分析與雜種優勢結果一致.具體表現在產量性狀上，親本相當配製的組合雜合顯性較高，其超親優勢正向顯著，而極值親本（差異較大）所配組合沒有超過高親的.這表明親本差異小、親源關系較近的親本中仍然存在足夠的遺傳變異或某種機制以創造變異使育種取得更大的進展.相關分析表明了仍然存在嚴重的品質與產量的負相關，遺傳改良的難度較大
  7. 3 eight communities are identified by gradient analysis in desert - oasis ecotone, and species are divided into 5 ecological groups. dca ordination is superior to cca and dcca. variation of vegetation explained by environmental and spatial factors reaches 23. 4 % ; among these the species matrix explained by non - spatial soil factors account for up to 11. 5 % of variation, spatial variation that is not shared by soil factors explains up to 11. 6 %, their interaction explains up to 0. 3 %

    3 、通過梯度分析，阜康荒漠綠洲過渡帶群落可分為8個類型，物種可分成5個生態類型； dca排序效果優于cca和dcca ；土壤和空間因子解釋了植被分異的23 . 4 ，其中土壤因子佔11 . 5 ，空間因子佔11 . 6 ，二者交互作用佔0 . 3 。
  8. With succession of community, the activity of catalase increased gradually, and the vertical variation of the activity was affected by environmental factors and did n ' t show identical rule

    華東師范大學博士學位論文摘要過氧化氫酶活性隨著演替的發展有逐漸增大的趨勢。各植被帶酶活性垂直分佈受環境因子的影響而沒有統一的分佈規律。
  9. As one of the typical environmental disasters at south strand plain in laizhou bay, occurrence, development and variation of salt - water intrusion have close relationship with paleo - environmental evolution since late pleistocene, and with modern environmental change and human activities

    摘要通過對萊州灣南岸鹹水入侵較嚴重地濰河下游地區晚更新世以來沉積特徵及現代自然環境條件變化的分析，探討了沉積相對鹹水入侵產生及空間范圍特徵的環境機理。
  10. This thesis is mainly studying the genetic structure and variation of p. sibirica with rapd and the correlation with the surrounding environmental factors. and the survey provide the accurate and scientific information for understanding the genetic background systematic evolutionary of the desert plants and planning the effective conservation strategy

    目前對叉毛蓬的研究很少，本文試圖運用rapd分子標記技術研究叉毛蓬居群的遺傳結構和遺傳分化，並且探討其與生境的相關性，為探明荒漠植物的遺傳背景、系統演化及制定保護策略提供科學依據。
  11. The observer makes use of motor parameters to estimate speed, but these parameters ( stator and rotor resistance, magnetizing inductance ) will vary because of the change of environmental temperature, iron loss and main flux saturation. so parameter variation will lead to the error of estimation, the purpose of this paper is to study the influence and the compensation of parameter variation

    因為觀測器在估計轉速時利用的是電機的額定參數，而電機的參數（定子電阻、轉子電阻、勵磁電感）由於環境溫度的變化、鐵心損耗和主磁飽和的影響將發生變化，所以必然有估計誤差產生。
  12. This article belongs to demonstration study, base on inspecting environment to typical area and analyzing a mass of data, the author detailed analyzed mutually affected way of northwest area population distribution and the environmental variation, opened out the problem between northwest area population distribution and the environmental variation, and then discussed how these problem effect building a well - off society in an all - round way, last under the promise goal of building a well - off society in an all - round way, put forward countermeasure and suggestion of the population distribution and the resources environment harmony development which have northwest local characteristic. the becoming references for the policy - decision are both the main subjects and the aims. this article can be divided into four parts according to the research content : the first part : elaborated the importance of ecological environment construction in building a well - off society in an all - round way

    本文屬于實證研究，作者在對典型地區採取社會學調查和環境考察，並充分利用統計數據和文獻資料的基礎上，詳細的分析了西北地區人口分布與資源環境變化之間相互作用的方式，揭示出西北地區人口分布與資源環境關系中的問題，並分析這些問題在全面建設小康社會進程中的影響，最後，在全面建設小康社會的目標約束前提下，提出了具有西北地區特色的人口分布與資源環境相協調的對策與建議，希望能為有關部門在全面建設小康社會的大背景下制定方針政策，提供一些意見和建議，同時為有志於研究西北地區人口與資源環境關系的學者提供一些參考資料。
  13. Others that related the ancient times climatic change, for instance ancient - river hydrodynamic force condition and so on, also are the important contents that we understand the ancient times environmental variation rule

    其他與古代氣候變化相關的變化，比如古土壤中稀土元素和微量元素的含量，古河流的水動力狀況等，也都是我們了解古代環境變化規律的重要內容。
  14. The dynamic bit rate allocation module receives relevant data from the loss rate of multi - media data packet, jitter, delay, and compares these data with predefined values to make one of these 3 decisions that : decrease the video bit rate ( stat = decrease ), or maintain current video bit rate ( stat = hold ), or increase video bit rate ( stat = inccease ). the video bit rate will be adjusted according to the decision and the total bit rate is changed accordingly. in this way the impact of network environmental variation is settled, and consequently the adaptability of videoconference systems in remote education area is improved

    整個模型從rtcp協議獲得多媒體數據包丟失率（ lossrate ） 、抖動（ jitter ） 、延時（ delay ）的相關數據，這些數據與預先設定好的閥值作比較，得出減小視頻位速率（ stat = dectease ） 、維持視頻位速率不變（ stat = hold ）或增大視頻位速率（ stat = increase ）的決定，模塊根據這些決定對視頻位速率進行相應的調整，從而總的位速率也相應變化，這樣可以減小由於網路環境變化而帶來的影響，從而提高視頻會議在遠程教育應用中的實用性。
  15. Susceptibility of the late cenozoic red earth - loess sequence in xunyi, shaanxi province and environmental variation

    黃土序列磁化率特徵與環境變遷
  16. The land use and the land cover research has become the whole world environmental variation research the important part and the core content

    土地利用和土地覆蓋的研究已成為全球環境變化研究的重要部分和核心內容。
  17. Rapidly changing needs variable strategies, so enterprises need to transform continually to respond to the environmental variation and pursue the development of them

    迅速變動的時代需要變動的策略，企業要應對環境的變化和謀求自身的發展，必須不斷地實施變革。
  18. With the rapid progress of science and technology, information from single sensor will no longer meet actual demand, and it is requisite to employ multifunctional sensor to detect environmental variation

    隨著科學技術的飛速發展，依靠單傳感器提供的信息已經無法滿足實際需要，因此必須運用多功能組合傳感器對環境信息進行檢測。
  19. The land is the important constituent in the ecosystem, land use and land cover change may cause the whole world environmental variation, the land use change already becomes important one of studying global change

    摘要土地是生態系統中的重要組成部分，土地利用和土地覆被變化可以引起全球環境變化，土地利用變化已經成為研究全球變化的重要領域之一。
  20. It is shown from the study results that human being is the origin causing the environmental variation, and the results of environmental variation in turn act on human being, namely, human being discharge co2 to result in the rise in air and water temperatures, and the earth ecosystem makes the air and water temperatures fall down and return to the normal dynamic balance by means of its complementary mechanism

    研究結果表明，人類是引起環境變化的起源以及其變化后的結果又作用於人類，即人類排放二氧化碳引起氣溫和水溫的上升，地球生態系統又藉助其補充機制使得氣溫和水溫下降恢復到正常的動態平衡。
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