time diversity 中文意思是什麼

time diversity 解釋
時間分集
  • time : n 1 時，時間，時日，歲月。2 時候，時刻；期間；時節，季節；〈常pl 〉時期，年代，時代； 〈the time ...
  • diversity : n. 1. 不同，異樣，差異。2. 繁多，多種，多樣，駁雜，參差。
  1. One mechanical company acts as agent at the same time east calm sb ' s anger of the compressor of card of many domestic and international famous mouth, fluid uses yuan of parts of an apparatus, decelerate machine and a replacement, have heavy equipment and fittings, acting industry pump, force plunger pump, balata, valve and pipe fitting, line oiler, undertake in enlarging operation ceaselessly multivariate acting development, execute for broad user all - around stereo service ; lukewarm city person is receiving sincere letter fairness, price the company article of creed or faith of satisfaction of diversity of reasonable, breed, excellent service, user, enter in all hand in hand in new century with broad user, achieve in all brilliant

    東一機械公司同時代理多家國內外知名口牌的壓縮機、液壓氣動元器件、減速機及配件、起重設備及配件、代工泵、柱塞泵、橡膠、閥門及管件、注油器、水處理設備、工控設備等生產廠家，在不斷地擴大經營規模中進行多元代發展，為廣大用戶實行全方位立體服務；溫州人秉承著誠信公平、價格合理、品種多樣、優質服務、用戶滿意的企業信條，與廣大用戶在新世紀中攜手共進、共創輝煌。
  2. The origin and evolution of land plants was an important event in the history of earth life and has affected all other lives on the earth and global environment. during the past two decade, the new discoveries of fossil plants microfossils and megafossils from the mid - ordovician through all silurian to the lower devonian improved knowledge of the origin of land plants, provided a time framework of the basal groups for the land plants and the early evolution diversity of vascular plants. three new plant based epochs have been recognized. on the other hand, molecular sequence studies have provided insights into the phylogeny and early branches of land plants. a phylogenetic tree has been established by the joint of a study of comparative morphology and gene sequences. this paper summarizes recent advances and new knowledges, comments on the phylogenetic studies based on the cladistic analysis

    陸生植物的起源和演化是地球生命中的重大事件，它影響到地球上所有的其他生命和全球環境。在過去的20年中，從中奧陶世歷經整個志留紀至早泥盆世的巖層中，化石植物微化石和大化石的新發現改變了人們對陸生植物起源的認識，並且為陸生植物和維管植物早期演化分異提供了基部類群分化的時間框架。據此人們識別出地史中的3個陸生植物的時代：始胚植物時代始維管植物時代和真維管植物時代。
  3. Because humans have been around for a relatively short time by evolutionary standards, scientists say that there is not enough genetic diversity in humans to allow us to be divided into neat, racial cubbyholes or subspecies.

    因為就進化的標準來說，人類的存在相對較短，因此科學家認為，人類的基因不夠的多樣化，還不足以劃為純粹的種族分支或亞種。
  4. Last, combining the three diversity indexes and the five chemical indexes, the major constitution component analysis and the clustering analysis were applied to make the evaluation of the water quality. at the same time, the nutrition type and the black and foetid rate were evaluated

    最後，結合三項多樣性指數和五項化學指標，運用主成分分析和聚類分析評價內河的水質，並對內河進行營養型和黑臭率評價。
  5. Genetic diversity and phylogeny of 55 slow - growing rhizobia isolated from peanut ( arachis hypogaea ) in china were determined by analysis of host - plant range, phynotype, 16s rrna rflp, 16s rrna sequence, 16s - 23s igs rflp, rapd, rep - pcr, dna - dna hybridization homology. at the same time, the competitive nodulation capacity of rhizobia, effect of host plants and soil ph on the rhizobia were determined for screening and improvement of high effective rhizobium inoculant

    本研究採用宿主范圍試驗、表型性狀測定、 16srrna - rflp 、 16srrna序列分析、 16s - 23srdnaigsrflp分析、 rapd分析、 rep - pcr分析和dna - dna同源性分析等技術系統研究了從我國不同地域分離的55株花生根瘤菌的遺傳多樣性及其在根瘤菌系統發育中的地位和相互關系。
  6. The genetic relationship between isolates of europe and china was closer than china and north america ' s. the inner genetic diversity of chinese phylogenesis lineages is higher, at the same time the territorial genetic differentiation and evolution direction divergence have taken place. the mixed lineage in heilongjiang province indicated that the isolates distribution pattern of a. gallica in heilongjiang province accorded with the characteristic that the distribution was formed by adaptive radiation of common ancestral forms

    在以黑龍江省高盧蜜環菌為主的中國大陸發育系內部的遺傳分化程度較大而且遺傳多樣性較高，並出現了區域性的遺傳分異和進化方向的分歧，同時還證明了黑龍江省內高盧蜜環菌的分佈格局也符合由共同的遠古祖先種適應性輻射形成的特點。
  7. Stbc ( space time block code ) is the main method to realize mimo diversity, and it is good at mitigating the influence of wireless multipath fading

    而stbc （ spacetimeblockcode ，空時分組碼）則是實現mimo分集的重要手段，長于對抗通道的多徑衰落。
  8. Based on the analyses of the diversity of shape and structure of tarsometatarsus of living birds and its corresponding function, we can study the shape and habit of birds in the early stages, at the same time can discuss the evolutive law of functional behavior of birds in the different periods of the geologic history further too

    特別是通過對現生鳥類跗跖骨形態結構多樣性與對應功能的分析，可以此作為研究早期鳥類形態習性的參考依據，同時也可進一步探討不同地質歷史時期鳥類功能行為的演化規律。
  9. In this work, some species of palmae cultivated in the xiamen botanical garden had been selected to be analyzed their genetic diversity with rapd ( random amplified polymorphic dna ) technique. according to the result of genomic dna amplified with pcr ( polymerase chain reaction ), genetic distance and similarity between different palm species were calculated on nei " s estimate of similarity and genetic distance. a primary but first time research at the phylogenetic relationships of some genera and species, the molecular classification and identification of some puzzling species of palmae was carried out through upgma ( unweighted pair group mean average ) cluster analysis of the genetic distance together with comparative study of the morphological structure characteristics

    本文在初步調查分析了棕櫚科植物在我國的自然分佈、引種馴化情況以及該類植物在廈門地區栽培應用狀況的基礎上，首次採用rapd分子標記技術，對廈門萬石植物園引種的一些棕櫚科植物的遺傳多樣性進行了研究，根據pcr對基因組dna擴增的結果，用nei ' s相似性系數計算了不同植物間的遺傳距離和遺傳一致度，通過對遺傳距離的upgma聚類分析，並結合形態分類的特點，對棕櫚科植物的屬、種間的系統分類關系和一些疑難種的分類鑒定進行了初步研究。
  10. In this paper, the genetic diversity of qinghai - lake naked carps was studied for the first time by methods of chromosome karyotype, protein ( isomzy ) electrophoresis and mtdna rflp. the results of chromosome karyotype indicated that : ? the diploid chromosome number of qinghai - lake nakked carp was 2n = 92 that comprised of 18 metacentric chromosomes, 18 submetacentric chromosomes, 16 telocentric chromosomes and 40 acrocentric chromosomes, and the karyotype formula was 18nvh8snvh6st + 40t, nf = 128

    染色體核型研究結果表明；青海湖裸鯉染色體總數2n = 92條，由18條中著絲粒染色體、 18條近中著絲粒染色體、 16條近端著絲粒染色體和40條端著絲粒染色體組成，其核型式為： 18m + 18sm + 16st + 40t ， nf = 128 。
  11. The theoretical analysis shows that any human activities, responsible for the changes of rock, air, water, soil and biology inside or outside the caves, will influence inevitably cave animals in terms of such levels as molecule, cell organelle, cell, tissue, organ, system, individual, population, society and ecosystem. these effects can be observed on cave animal ' s shape - building, activity, tissue structure, metabolism, space - time distribution, biothythm, structure of population and society, food chain, bio - relation, diversity of population and society, and function of the above - mentioned levels

    理論分析表明，凡是能夠引起地表和洞穴巖石、空氣、水、土壤、生物等變化的一切人類活動都不可避免地使洞穴動物在分子、細胞器、細胞、組織、器官、系統、個體、種群、群落和生態系統各級層次上產生效應，這些效應具體表現在影響洞穴動物形態建成、行為、組織結構、新陳代謝、時空分佈、生物節律、種群和群落結構、食物鏈結構、生物關系、種群和群落多樣性以及各層次所表現的功能的多少、快慢、強弱等方面。
  12. For the complexity and diversity of the black - spot cause of formation, we find a method based on the rough set to determine the most important inducement of the black - spot, then we can repair the inducement in effect and save more time and money

    該文針對交通事故多發點成因的復雜性和多樣性，提出通過粗集來對公路交通中的不利因素進行篩選，找到形成事故多發點的最大誘因，從而有針對性地進行整治，能夠有效地節約時間和費用，避免不必要的人力、物力浪費。
  13. This event is sometimes called the " cambrian explosion ", because of the relatively short time over which this diversity of forms appears

    這次事件有時稱"寒武紀爆炸" ，由於形式這變化看上去的相對地短時間。
  14. With the increase of abandoned time, perennial plants increased, the function communities were richer, p diversity index in two communities reduced with abandoned interval, but the vegetation restoration was slow, the land abandoned for 30 years have not got to climax community

    隨撂荒年限的增加，多年生植物的種類和數量逐漸增加，植物群落功能群構成逐漸豐富，群落間多樣性指數隨撂荒時間間隔的增大而逐漸減小。但植被恢復緩慢，撂荒30年仍未達到頂極群落階段。
  15. Genetic diversity of drought tolerance at flowering time in elite maize germplasm

    我國主要玉米自交系開花期耐旱性差異及改良
  16. Flexible switching ( fs ) is one strategy for complex system control, fs would be including of hard switching and soft switching, fs can be driven by both continuous variables and discrete events, at the same time, fs has the characters of diversity and hiberarchy

    柔性切換是針對復雜系統控制問題的一種控制策略，柔性切換可以同時包含硬切換和軟切換，其切換策略是既受連續變量驅動，又受離散事件驅動，而且切換具有多樣性和層次性。
  17. Two crucial technologies in instantaneous negative pressure wave method are analyzed in this dissertation, then a means is presented which can eliminate the dynamic response time diversity between pressure sensors in the beginning and end of the pipeline, by adopting gps to unify the system time between data collecting systems in two ends

    分析了負壓波泄漏定位方法的兩項關鍵技術，提出了消除首末、端壓力傳感器動態響應時間差的方法，採用gps來統一首末端數據採集系統的系統時間；使定位更加準確。
  18. In this paper, bit - error rate performance analyses are presented for coded and un - coded frequency hopping m - ary frequency - shift keyed systems under the condition of additive white gaussian noise ( awgn ) and partial band noise jamming and multitone jamming. the use of error - correct codes provide a way to improve the performance of frequency hopping system, particularly the use of reed - solomon code in a fh system under the condition of partial band noise jamming can greatly improve the performance of system. so we provide the way of coding and decoding of rs code in c language. in the end, we offer the simulation of the performance of time diversity fh / 2fsk system over partial band jamming noise channels

    第一章為緒論，敘述跳頻通信的發展趨勢，以及基本概念，第二章及第三章介紹提高抗部分頻帶干擾的前向糾錯碼reed - solomon碼的原理和實現方法。第四章研究跳頻通信系統在各種干擾條件下的性能。最後在第五章以fh mfsk系統為例，探討在部分頻帶干擾下的系統性能，並進行計算機模擬，模擬結果表明採用分集技術和各種編碼技術對于系統的性能改善具有明顯的效果。
  19. The fourth part considered how to improve system performance by adopting transmission diversity in flat fading channels. in the traditional space - time trellis code design, the space diversity, time diversity and channel code are concerned together to get best space diversity, time diversity and code gain

    傳統的空時格碼把空間分集、時間分集和前向糾錯編碼聯合設計，以n摘要獲得最大的空間分集、時間分集、通道編碼的增益。
  20. And diversity is a technique of extensive use and maturation, a technique of more inexpensive investment with more improvement in wireless communication. the common diversity be classified as space diversity, polarization diversity, frequency diversity, and time diversity etc. this paper focus on implement of space diversity and polarization diversity in digital field

    無線傳輸在自然界中存在大量不相關的多徑信號，分集技術是通信中的一種廣泛應用的、成熟的技術，一種用相對較低廉的投資就可以大幅度的改進無線鏈路性能的強有力的接收技術。
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