集合種群 的英文怎麼說
中文拼音 [jígězhǒngqún]
集合種群
英文
matapopulation-
Under mixed culturing conditions, it was observed that bacterial number rapidly incre ; ised soon after the lysing of host cells. on the contrary, while the non - host cyanobacterium ( i. e. anabaena flos - aquae ) was incubated in the mix culturing system, the breeding of the bacteria could be inhibited. it may be suggested from the result above that cyanophage could bring about the changes in microorganism populations
調查結果顯示, 19個採集的水樣中有6個含有裂解織線藻的噬藻體,而且水樣未經濃縮即能裂解宿主,說明噬藻體在淡水中分佈較廣泛,裂解性也較強;混合培養條件下的研究結果表明,噬藻體裂解宿主后,細菌數量快速增加,而當培養系統中有非宿主藻類存在時,細菌的增殖則受到非宿主藻的抑制,說明噬藻體可以顯著改變系統中微生物的種群結構。The competition among those species like s. tsinyunensis, dryopteris erythrosora and veronicastrum stenostachyum etc., is intense in the communities, which may be one of the reasons why s. tsinyunensis is going to be endangered and with a very restricted distribution. the distribution patterns of the seven populations of s. tsinyunensis are clumped among the eight populations we studied, except population v of random distribution. the spatial pattern of 6 populations of s. tsinyunensis have high consistency with the negative binominal distribution, while another 2 populations, i. e., i and iii are poisson distributions
6 )縉雲黃芩各種群空間分佈格局基本呈聚集分佈,其中7個種群的分佈格局類型是聚集分佈,其聚集強度較高,另有一個種群為隨機分佈;其種群的離散分佈擬合結果也嚴格符合一定的數學模式,其中負二項分佈、 poisson分佈分別是該物種種群空間分佈的理論分佈模式,其中6個種群擬合出的結果是負二項分佈,種群i和種群m擬合出的結果是poisson分佈。On the basis of foreign documents, the dissertation firstly describes the morphology, taxonomy, and biological characters of cochineal insects. then, by using artificial climate cases in the lab, according to orthogonal design, 8 lands of combinations of temperature, humidity and light is set, while the temperature has four levels : 15, 20, 25 and 30, and the relative humidity has two levels : 60 % and 80 %, while the light also has two levels : 980 lux and 60 lux. through observations and analysis of hatching percentage, survival percentage of the first instar and during from the second instar to the adult, the population tendency index, generation life cycle, size and eggs of female adult, the development of the cochineal under different conditions is studied
在收集、整理國外對胭脂蟲的研究資料基礎上,首先從胭脂蟲的形態學、分類學、生物學特性入手,進而在實驗室內利用人工氣候箱,應用正交設計方法,設計了4種溫度、 2種濕度、 2種光照梯度的不同組合,通過測定胭脂蟲的孵化率、 1齡若蟲的存活率、 2齡若蟲至成蟲期存活率、種群趨勢指數、世代歷期、雌成蟲的大小、懷卵量等生物學指標,深入研究胭脂蟲在這些組合下的生長發育狀況,應用數理統計方法,分析出溫度、濕度和光照對各項生物學指標的影響,找出胭脂蟲適宜的室內培育條件,並為野外胭脂蟲的培育提供一定的理論依據。A group of individuals can be called a population.
個體的集合稱為種群。They, using agglutination, complementfixation, and precipitate tests, divided rhizobium cultures from 18 legumes into nine characteristic serological groups.
他們用凝集作用,補體結合試驗和沉澱素試驗把從18種豆科植物分離出來的根瘤菌培養物分成9個具有特點的根瘤菌血清類群。Dusky thrush ( turdus naumanni ), common magpie ( pica pica ), bohemian waxwing ( bombycilla garrulus ), grey - faced woodpecker ( picus canus ) mainly consists of single species, and the average population size is 6. 26 individuals ( 1989 - 1990 ) and 7. 44 individuals ( 2001 - 2002 ), the mixed species population mainly consists of great tit ( parus major ), marsh tit ( parus palustris ), eurasian nuthatdch ( sitta europaed ), the average species number is about 3, average number is 7. 4 individuals
冬季鳥類的集群明顯,單種群主要為長尾山雀、斑鴉、喜鵲、太平鳥和黑枕綠啄木鳥群,每群平均個體數為6 26隻門? 1990年)和7 44隻( 2001 2002年) ,混合群主要由大山雀、沼澤山雀和普通幅構成,每群平均種數在3種左右,平均個體數在7Thirdly, the working time depends on season change and there is a different focus in the evaluation of merit & benefit. lastly, there are many scattered manufactured sites for one unit, so the employers work not in a single site. in order to adapt to the requirement of management information and the modernization, it is urgently to develop a hrmd to supply information integration and share of human resources management in those institutes
我國市級科研所正處于科研體制改革時期,在人力資源管理上具有「專業技術人員多,知識群體密集;多種分配模式並存,實際工資和檔案工資分離;工作時間季節性強,績效考核各有側重;生產基地多,人員分散」等特點,為適應管理信息化、現代化的發展要求,迫切需要開發一個符合行業管理特點,能為人力資源管理活動提供信息集成和共享的人力資源管理與決策支持系統。Based on the enviroment of the nandagang wetland, combining the outside investigation and inside analysis, adopting the mathematical analysis methods such as the principal component analysis ( pca ), regression analysis, correlation analysis etc. the type of wetland ecosystem, the flora of the wetland plant, the type, the function, the formation and succession and the outside influencial factors of the vegetation, the ecological conditions and biomass of the reed population are all studied. the main results can be concluded as follows : 1 ) the nandagang wetland is a freshwater one close to the bohai sea. its ecosystem can be divided into two parts : natural ecosystem and semi - artificial ecosystem
本研究從南大港濕地的實際環境出發,採用樣方調查的方法,以外業調查和內業分析相結合、野外採集測量與實驗室分析處理相結合、定性描述與定量分析相結合為根本研究路線,應用主分量分析( pca ) 、回歸分析、相關分析等數學分析手段,對南大港濕地生態系統的類型、濕地植物的區系組成、濕地植被類型、植被的功能、植被的形成和演替、植被的外界影響因素、濕地蘆葦種群的生態條件和種群生物量等方面進行了較深入的研究,主要研究結果如下: 1 )南大港濕地是濱海瀉湖型淡水濕地。On the one hand, the teacher should organize and establish the class collective consciously
一方面,要有意識地組建班集體。另一方面,要注意對班級中的兩種群體的整合。The growing custom of regularly assembling from afar the representatives of all kinds of groups, not only for political conventions, but also for commercial, professional, learned, and vocational ones … in turn supported the multiplying hotels
增長中的風俗,通常集合了所有種類的群體從遠方來的代表,不僅為政治慣例還是為貿易上、專業上、已學習的和職業的慣例… ,輪流支持了增長中的賓館。We studied its distribution pattem by using the following measures f the test for fitting to the poisson, negative binomial and neyman a distribution. at the same time, we use negative binomial parametef, dispersal index, patchiness index, cassie s index and clumping index, estimated the aggregation intensity. the results showed that the distribution pattern is typically aggregated, and the intensity of aggregation vari
經統計分析,青島百合復合種群、各局部種群內個體的分佈格局離散分佈擬合的結果符合負二項分佈;各聚集強度參數中,叢生指標)和cassie指標(二k )均大於o ,負h項參數限)均較小,擴散系數k卜擴散型指數)和聚塊性指標( m m )均大於1 ,以上這些表明各個局部種群的分佈格局都為聚集分佈。Theoretical basis for species conservation : from the theory of islandbiogeography to metapopulation dynamic theory
從島嶼生物地理學理論到集合種群理論The higher landscape heterogeneity, the closer to nature secondary forest. along the gradient, landscape congregation index exhibits descendent tendency, showing a significant relationship between the extent of patch mosaic and the extent of disturbance, according to changes of landscape mean shape index ( lmsi ) and landscape mean fractal dimension index, integrated disturbance ( nature disturbance, human activities, vegetational inner succession or population dynamics ) tend to enhance
景觀聚集度指數是隨著梯度區呈下降的變化趨勢,表明斑塊之間的鑲嵌聯系的程度與受到的干擾程度有極為重要的關系。從景觀平均形狀指數和景觀平均分維數的變化,可看出綜合干擾(自然干擾、人為活動、植被的內源演替或種群的動態變化)是呈增強的發展趨勢。In the same time we also use it to test the power of dc crossover. in this algorithm every element in the population a domination count is defined together with a neighborhood density measure based on a sharing function. those two parameters are then non - linear combined in order to define the individual ' s fitness
演算法通過計算種群中pareto優于某個個體的個體數目以及個體所在位置的密集度來定義適應度函數,多個算例的測試結果表明該演算法結合錯位交叉運算元具有較好的性能,能夠使演算法收斂到pareto概念下的比較均勻的一組非劣最優解。This thesis contrasts and analyses the different calculation - method, and improves the genetic algorithm in the parameter inversion of the rock and soil engineering. the strategies are mainly in the following three aspects : 1, new searching way is compositely searching genetic algorithm which is made up of the acceleration method and genetic algorithm when it partially calculates in the later time ; 2, index function is inducted in gengetic operators, at the same time repeated select and double exchange pool are used ; 3, splicing crossover, which reserves some new evolution factions, improves authority function accaunting the capabilities and kinds
本文對優化演算法中不同求解方法進行對比分析,針對遺傳演算法在巖土工程參數反演運算中進行了改進,改進的策略主要集中於三個方面: 1 、提出了在遺傳演算法中融入形加速法的改進方法? ?復合遺傳搜索法; 2 、針對遺傳運算元的選擇策略,引入指數適值方法,設置雙交換池,提出了重復篩選法; 3 、加強對劣勢種群的內部優良信息的遺傳功能的改進,引入權函數,擴大可交叉運算元的種類,保留各運算元的進化功能,提出了融合交叉運演算法。At present, there have been extensive studies on the animal metapopulation. however, studies on the plant metapopulation are rare. in addition, studies on metapopulation in our country mostly focused on translating extemal papers and introducing the situation of their researches, and nearly there is n ' t material study on metapopulation
另外國內雖已開始重視復合種群的研究,但目前的工作還主要集中在對文獻資料的翻譯和對國外研究進展的介紹方面,涉及對復合種群的有關理論探索和經驗研究方面仍然近於空白。In order to maintain the population diversity, the algorithm retains the individuals which have better fitness and farther away from the sets of the selected individuals, and uses the parameters of clustering to reduce computation cost
為了保持種群的多樣性,演算法保留那些具有較好適應值並且與所選的最優個體集合較遠的個體,並利用聚類的參數來減少計算量。It is this elevated level of performance which is the main justification for using the group process rather than a simple group of staff
這種團隊表現的提升是為何要採用團隊工作程序而不是僅僅把一群普通的員工集合到一起的最主要理由。It improves the tsp tour and reverses the order of the sub - tour. the dds method is a combination of global parallelism with coarse grained pga. there is however no migration operator as such, because the whole population is treated during the evolution as a single collection of individuals
動態種群模型是一種由全局并行模型和粗粒度并行模型結合而成的并行遺傳演算法模型,但它並沒有遷移操作,因為在進化過程中種群僅僅被當作是個體的集合。Such a pooled mode, subverts the traditional architectural concepts and combines building housing, shopping, leisure and entertainment, health and other functions into an integrated property group, the residents living here feel immensely relaxed and comfortable and happy
這種集合性模式,顛覆傳統的建築理念,構建居住、購物、休閑、娛樂、養生等多種功能於一體的綜合物業群,讓生活在這里的居民感到無比的輕松、舒適和快樂。分享友人