重對數選擇性 的英文怎麼說

中文拼音 [zhòngduìshǔxuǎnzháixìng]
重對數選擇性 英文
log-log selection
  • 重 : 重Ⅰ名詞（重量; 分量） weight Ⅱ動詞（重視） lay [place put] stress on; place value upon; attach im...
  • 對 : Ⅰ動詞1 （回答） answer; reply 2 （對待; 對付） treat; cope with; counter 3 （朝; 向; 面對） be tr...
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 選 : Ⅰ動詞1. （挑選） select; choose; pick 2. （選舉） elect Ⅱ名詞（挑選出來編在一起的作品） selections; anthology
  • 擇 : 擇動詞（挑選） select; pick; choose
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 選擇 : select; choose; opt; election; choice; culling; alternative
  1. They are jinfo mountain in nanchuan county ( natural protection section ), wuling mountain in qianjiang county ( national emphases forest demonstration county which forest cover rate is beyond 50 % ) and zhongliang mountain in beibei county ( artificial destruction is very grave ). some main land use patterns i. e. woodland, garden, infield, abandon infield, shrub and grassplot are selected in those three sample sites. four aspects on soil fertility index of karst environment under different land use patterns in these three sample sites, are revealed in this paper, by using the field test, indoor measure and analysis, outdoor experiment and field investigation, and the knowledge and technique of soil, ecology, physics and chemistry etc. they are physical characteristic ( effective soil thickness, organic layer thickness, soil texture, water - stable aggregate and soil water etc. ), chemical fertility ( organism, omni - n, omni - p, omni - k, alkali - nitrogen, available p, available k and rapid available k etc. ), soil animalcule ( bacteria, fungi, actinomyces and their grosses ) and soil - seed - pool ( plant community diversity index ) in karst ecosystem

    本研究以重慶市的南川金佛山（自然保護區） 、黔江武陵山（國家重點退耕還林示範縣，森林覆蓋率50以上）和北碚中梁山（遭人為破壞嚴重）典型巖溶區為對象，選擇了幾種重要的利用方式，包括林地、果園、耕地、棄耕地和灌草坡，採用野外巖溶生態調查和室內試驗測量分析相結合的方法，以不同土地利用方式巖溶土壤肥力為重點，對不同土地利用方式土壤肥力特徵進行量化分析，找出巖溶土壤肥力差異的主要方面及其根本原因，論文主要從土壤剖面物理退化指標（有效土層厚度、有機質層厚度、質地、團聚體、水分含量等） ，化學肥力退化指標（有機質、全n 、全p 、全k 、堿解n 、速效p和速效k等） ，樣地土壤微生物指標（細菌、真菌、放線菌數量及總量）以及樣地土壤種子庫植物群落多樣性等4個方面對重慶典型巖溶區的土壤肥力特徵進行了較為詳細的分析研究，為巖溶地區士壤資源的合理利用及結構的調控管理提供依據。
  2. And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed

    研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。
  3. Three types of cuticular thickening at the polar region of the guard cells are observed : slight cuticular thickening ; rod - shaped culicular thickening and rarely t - shaped thickening. with data obtained from the former research and personal observation, the cladistic methods were employed for the phylogenetic analysis of data and trees were rooted by out - group comparison using, the related genus kadsura. as result, a new system of the genus schisamdra michaux was reconstructed, and schisandra michaux was subdivided into 2 subgenus, 3 section, 2 series 10 species in this dissertation

    整理有關五味子屬植物研究的資料，補充搜集近期發表的資料和本人研究所得數據，以種為基本單元，選擇近緣的南五味子屬（ kadsura ）作為外類群，採用paup4 . 0b4a軟體對本研究得出的性狀數據作分支分析，重建五味子屬的系統發育，修訂和補充五味子屬分類系統，在五味子屬下設2亞屬、 3組、 2系、 10種。
  4. In the self - calibration scheme, the thesis emphasizes the accuracy of camera intrinsic and extrinsic parameters. we presents an accurate f method based on corresponding point adjustment. the method adjusts coresponding points according to the fixedness of projective transformed cross ratio, then calculates f matrix accurately through linear and non - linear methods. when computing intrinsic parameter, a matrix, we simplify the step, and stress on the two important parameters of a. the result will be getten through solving kruppa equation based on svd decomposition. in order to compute extrinsic parameters, we use linear method to get initial r and t, then apply non - linear method to accurate them

    提出了基於匹配點調整的f求精方法，先根據攝影交比不見性對手工選擇的匹配點進行調整，再用線性、非線性結合的方法求精f矩陣；在計算內部參數a中，進行了一定的簡化，把重心放在a中重要的兩個參數上，用svd分解法計算kruppa方程；在計算外部參數時，首先用線性法求解r 、 t ，然後再用非線性法迭代求精。
  5. Stressed are the elements of this insurance, the insurability, the common contents and the insurance coverage, and the kind of benefits. probability is used to give the greatness of risk, and mathematical statistics is utilized to calculate the insurance charge. a new method is proposed to settle the insurance charge rate by the claim frequency and claim quota

    著重對建築工程保險的基本要素、可保性、一般性內容和保險項目、承保方式的選擇進行了研究，運用概率論來確定建築工程風險程度，運用數理統計理論給出了建築工程保險費的計算方法，並提出以索賠次度等級釐定保險費率的一種新方法。
  6. The control system of furnace " s temperature has been widely used in every walk of life, as an important link of repair and manufacture of the electrical equipment such as electromotor transformer etc., soaking lacquer drying craft has some especial requests on drying crafto this article starts with the analysis of drying chamber " s configuration, analyzed its configuration limitation and control function limitation according to the factory " s situation and advances the conception of heated air drying circulation, in addition, this article adopts an intellectualize a / d module, a development sampling tuning - voltage circuit, and presents the method to measure online the insulation resistance of products in order to improve constantly products quality

    而浸漆乾燥工藝作為電機、變壓器等電氣設備的修理、製造中的重要環節之一，對乾燥過程的質量要求有一定的特殊性。該文從乾燥爐的結構分析入手，聯繫到工廠的實際情況分析了結構功能缺陷和控制功能缺陷，提出了熱風循環乾燥的概念，同時，選擇了較為先進的a d板卡、熱電阻信號調理板等專業化智能卡，運用數字pid控制技術，構成了一個較有特色的計算機控制系統。此外，該文還從保證乾燥品質量的角度，採用智能化交流模塊和自製采樣調壓電路的方法，提出了在線檢測產修品的絕緣電阻的方法和手段，以確保企業產品質量不斷提高。
  7. 2 the aggregate model of life insurance establish an aggregate model of life insurance by applying the alien modernly insurance actuarial theories and techniques, including deferred life annuities, whole life insurance and returnable premiums. the model has the following properties : ( a ) through the regulation of various parameters in the model, various insurance products can be obtained ; ( b ) the introduction of whole life annuities in the model eases economic predicament when the insured retire ; ( c ) a returnable premium part in the model makes the insurance products have double functions of insurance and savings ; ( d ) an endowment insurance actuarial model also can be gotten when annuity is continuous. and construct an optimization model based on aggregate model of life insurance

    這個保險精算模型具有如下性質： （ a ）保險公司可以根據實際情況調整參數，不同參數的組合可以得到不同的保險產品，靈活適用性較強； （ b ）年金的引入，可以緩解投保人退休后的經濟窘境，避免或減小因退休而面臨的經濟影響，保險的社會保障性得到了很好的體現； （ c ）模型中的還本部分，使得這種保險產品具有儲蓄和保險的雙重功能，不僅擴大了保險的社會職能，而且對于投保人來說，多了一種安全的投資選擇； （ d ）年金連續的情況下，建立了具有儲蓄功能的養老保險精算模型。
  8. Finally, depending on theory result and the problems, which existed during the experimentation, in the eye of rational and economical, some basic technical targets are gived for practical use. a small sized flexible - oared wind generator of 7w power is designed. the determination of constitution size and the selection of parameters are also carefully analyzed

    最後，根據理論結果和試驗中所出現的問題，從經濟、合理的角度出發，結合實際應用情況，給出了一些基本的技術指標，重新設計了一臺7瓦的小型柔性槳風力發電機，對一些結構尺寸的確定和參數的選擇，也作了較詳細的說明。
  9. The great bustard is polyphagia bird, but it feeds mainly on plants. the feeding field habitat selection relate with that whether the grassland burn or not last year. the important factors that determine the feeding field selection are the plant species, vegetative cover score. density hemerrocallis minor and the density of pedacularis sp. on burning grasslandsjthe density of vegetation. insects quanlity. plant species richness and the height of plant are the main factors that determine the feeding field selection on unburning grasslands

    大鴇是雜食性鳥類，但以植物性食物為主。對于取食地的選擇往往跟草原上一年是否被火燒過有關。在火燒地，植物種類數、植被蓋度、小黃花菜密度和蒿密度是取食地選擇的重要因素；在非火燒地，植被密度、昆蟲數量、植物物種豐富度及植物高度在大鴇取食地選擇中發揮重要作用。
  10. Result demonstrates, the girl student participates in physical training motivation purpose makes a diversification clear and assumes, the project choosing interest mainly and moving amounts minor, antagonistically weak sport carries out an activity ; be fond of participating in a collective waiting for an activity ; exercise number of times weekly and exercise grave deficiency of time every time ; the major factors being to affect girl student physical training such as space equipment and material deficiency, effective instruction after class means insufficiency

    結果顯示，女生參加體育鍛煉動機目的明確並呈多樣化，主要選擇趣味性和運動量小、對抗性弱的運動項目進行鍛煉；喜愛參加集體等鍛煉；每周鍛煉次數和每次鍛煉時間嚴重不足；場地器材不足、課外輔導的有效手段的缺乏等等是影響女生體育鍛煉的主要因素。
  11. The innovations of this thesis can be summarized into three points. firstly, the average relative velocity is introducd into a novel adptive weighted clustering algorithm as one important parameter of weight, then it increases the stability and self - adaptability of cluster head. secondly, a new approach to calculating weight is suggested by integrating subjective and objective factors. it is verified by comparison with other approaches to selecting weight. thus the velocity of weight responding to the changes of network topology is increased. finally, using a som neural network to create a classifying model enables every node to learn to identify by itself the role in manet

    本文的創新點有三個:首先本文在wca和aow分簇演算法的基礎上，引入了平均相對移動速度作為權值重要的參數，提出了一種新的基於權值的自適應分簇演算法，提高了簇頭在移動中的穩定性和自適應性;其次，提出了利用主客觀綜合賦權法確定權重的權值計算方法，通過與其他權重選擇方法比較，網路結構變化的權值響應速度得到了改進;最後，論文利用自組織特徵映射神經網路建立分類模型，使得網路中的節點可以自學習地確定簇中角色。
  12. The advent of dna micro - array make it possible to perform gene diagnosis and gene treatment. gene selection is one of the major challenge of gene - chip technology, for gene diagnosis where only a gene subset is enough for diagnosis of diseases, for resolution of curse of dimensionality which occurs especially in dna microarray dataset where there are more than thousands of genes and only a few number of experiments ( sample )

    基因晶元的出現為基因診斷和基因治療提供了很好的前提和可能性，超高維空間超小樣本的基因選擇問題是基因晶元技術的挑戰性課題之一，對于解決維數發難問題和獲得診斷基因具有重要的理論和實際意義。
  13. This study was conducted to examine the interrelationship of 10 seed vigor traits in 12 wheat genotypes through variance, co - variance and path coefficient analysis, to determine broad - sense heritability, and to estimate genetic advance under selection. the genotypes showed significant difference for all traits, except for percentage of normal seedling. genetic correlation between conversion efficiency of seed reserve, electrical conductivity with other traits were not significant, showed that selection for any of them might be possible without hampering any other traits. however path coefficient analysis indicated that conversion efficiency of seed reserve, seed reserve utilization ratio have strong direct effect in affecting seedling weight, and that mean germination time has significantly negatively correlated in affecting gi. moderate to high estimates of broad - sense heritability, genetic coefficient of variation and expected genetic advance were obtained for electrical conductivity, germination index, mean germination time, seed dry weigh, seedling dry weigh, seed reserve depletion ratio indicating the possibility for improving these traits

    本研究利用12個普通小麥品種對10個種子活力性狀的遺傳變異和相關研究，表明除正常幼苗百分率外，其餘種子活力性狀在品種間均存在顯著的差異.種子貯藏物質轉換效率、電導率兩個性狀間及與其它性狀均無顯著的遺傳相關，因此對他們的選擇不會影響到其它性狀.通徑分析表明幼苗干重主要取決于種子貯藏物質轉換效率、種子貯藏物質利用速率;發芽指數主要由平均發芽時間決定.電導率、發芽勢、幼苗干重、種子干重、發芽指數、種子貯藏物質消耗比率6個性狀表現中到高的遺傳力、遺傳變異系數和相對遺傳進展，指明通過遺傳育種手段改良這些性狀是可能的
  14. In order to study the slurry erosion properties of the particle reinforced polyurethane composites, a slurry erosion test apparatus was designed and manufactured based on the considerations of comparison between the present slurry erosion apparatuses and cost factor. the slurry erosion test apparatus proved to stable and reliable through tests, and it can be applied to material selection and erosion mechanism research

    經過實驗驗證表明，該沖蝕磨損試驗機供漿穩定，磨損數據重現性較好，是較為可靠的研究漿體沖蝕磨損的試驗裝置，適合於進行耐磨材料對比選擇以及漿體沖蝕磨損機理的研究。
  15. As the step of the color tv ( the second generation ) to the digital tv ( the third generation ) is larger and larger, the research of digital television terrestrial broadcasting ( dttb ) become more and more important in china, we are concentrating on the standard of dttb which is suit for our country after describing and analyzing the technical stipulation and speciality of dttb, this paper compares atsc 8 - vsb with dvb - t cofdm and isdb - t bst - ofdmo the emphasis of this article lies in the technical solution about transferring system, channel coding is important component of dttb, which can resist from the bad circumstances o because of lots of varieties and different performance, channel coding become one of the emphasis of the research work this paper analyzes and researches the theory and performance of the different channel coding particularly, points out an effective theoretic analysis method and computer demo of performance comparison a theoretical method for estimating the performance of concatenated codes is proposed in this paperc this is achieved by combining the performance of single level coding rayleigh fading channel and the character of channel modulation it may be useful to research and development of the future digital television terrestrial broadcasting standard of our country

    通道糾錯編碼是數字電視地面廣播傳輸系統的重要組成部分，是抵禦地面惡劣環境的有效手段。由於通道編碼的種類繁多，性能各異，因此是目前研究工作的重點之一。本文詳細分析和研究了幾種通道糾錯編碼的原理和性能，並針對外碼內碼級聯糾錯結合地面通道瑞利衰落提出了一種有效的理論分析方法和性能的計算機比較演示方案，總結了不同級聯方案的性能特點，對於我國目前的數字電視地面廣播標準的研究和通道級聯糾錯方案的確立及其參數選擇具有一定的參考價值。
  16. The mssr mode s technology, which was introduced firstly for the purpose of air tranfic control ( atc ) system, is based on the individually addressing and selective interrogation technology. the mode s can overcome many problems exist in mode a / c, such as signal interference, limited aircraft identification, garble and fruit, and provides the ability to build digital data link. many countries and organizations do them best to support researches about the communication, navigation and surveillance technology, which are all based on the mode s, and many productions have been adopted step by step by the international civil aviation organization ( icao ). so, to research the key technologies of mode s will contribute a lot to the development of domestic aviation system, especially for the air control system, identification friend foe and navigation system

    它建立在獨立編址、選擇性詢問的基礎之上，能夠解決在模式a / c中存在的信號干擾、有限的信息編碼、幻影（ garble ）和異步應答（ fruit ）等問題，同時在數據鏈路方面有著巨大的潛力。國際上，模式s的數據鏈技術得到了廣泛的關注，許多國家和組織大力支持基於模式s的通信、導航和監視技術以及航空管理新技術的研究，許多成果正逐步被國際民用航空組織（ icao ）所採用。因此，對模式s核心技術的深入研究對於我國在航空管理、敵我識別、導航等方面的發展有著重大的意義。
  17. As the representatives of salt - free organic reductants, hydrazine derivatives possess such advantages as strong reductivity and high selectivity. the kinetics of the reaction of np ( vi ), pu ( iv ) reduction by hydrazine derivatives have been studied deeply since 1980s. the results show that it ' s potential for applying hydrazine derivatives as salt - free reductants in purex process in the near future

    以肼類衍生物為代表的有機無鹽還原劑，具有還原能力強、選擇性高的特點。自上世紀八十年代以來，對于肼類衍生物還原np （ ） 、 pu （ ）的動力學已進行了較為深入的研究，並獲得了一系列重要的參數。
  18. According to the actual situation and performance requirements, how to impair the influence of the disturb torque and the uncertainty of the system object model and how to improve stabilization and tracking accuracy are the principal difficulties in this paper. to solve these problems, a method by using mutative - plus and high - order compensation is brought forward and design by adopting h mixed sensitivity method in the velocity loop, then the weighting function selection is discussed, and the concrete selection principles are given in details

    根據本系統的實際工作情況和性能指標要求，通過分析指出，如何克服機（艦）載條件下干擾力矩的影響及系統對象模型的不確定性是本系統中提高穩定精度和跟蹤精度要重點解決的問題，針對這一問題，提出了在速率穩定環採用變增益的串聯高階校正設計控制器和利用h _混合靈敏度方法進行控制器設計的方法，詳細討論了加權函數選擇的問題。
  19. Cid - icp - aes has the advantages of high sensitivity, high signal - to - noise and high quantum efficiency, which nearly reaches theoretical limit value of theoretical parts of an apparatus ; it can memorize thousands of spectra lines at the same time. cid - icp - aes is the newest model, and there are still few articles to report analytical character of this type, as this result the optimum of operating condition and the effect of analytical parameters for photometric precision, signal - to - noise and detection limits are studied : r. f. power is 11 sow, nebulizer pressure is 28psi, the measurement time is 3 times and the integral time is 20s

    本實驗室的光譜儀是當前最新型號的全譜直讀光譜儀，這類新型裝置分析性能的研究報道較少，因此研究著重分析了參數對測量精密度、線背比及檢出限的影響，對儀器最佳操作條件進行了摘要優化：發射功率採用1150w ；載氣壓力為28psi ，測量次數選擇3次，積分時間為205 。
  20. Natural autoantibody ( naa ) refers to antibodies that are present in the surum of healthy individuals in the absence of deliberate immunization with the targeted antigen. previous studies have showed that human immunity system includes a huge and complicated autoantibody repetoire. to date, several hundred naa have been found and proved to exist in normal individuals, including autoantibody targeted rbc, mhc, dna, transferrin, keratin, diphosphatidyglycerd, idiotype of igg, etc. naa, characterized by binding to various and nonspecific antigen, reacting rapidly, keeping conservative relatively, has been widely claimed to be an important constituted component of innate immunity. lt was proposed that the production of naa was related to positive selection of b lymphocytes

    對naa的研究表明，健康人體免疫系統中存在著一個龐大而復雜的自身抗體網路。包括抗角蛋白自身抗體（ antikeratinautoantibody ， akautoab ）在內，迄今已經發現並證實的naa有數百種，如抗rbc 、 mhc 、 dna 、轉鐵蛋白、脂類和多糖的抗體以及jerne免疫調節網路中的抗獨特型抗體（ anti - idiotypeantibody ）等。由於個體出生即有naa ，且naa具有作用范圍廣、沒有特異的選擇性、反應出現快、有相對的穩定性等天然免疫的特點， naa被認為是天然免疫（ innateimmunity / naturalimmunity ）的重要組成部分。
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