群選 的英文怎麼說
中文拼音 [qúnxuǎn]
群選
英文
mass selection-
Endangered abies yuanbaoshanensis will probably have been extinct, so it very necessary to studying its genetic diversity with a proper way in order to save this key group of biological diversity in china
元寶山冷杉是具有重大科學價值的類群，目前它卻處于高度瀕危極待保護狀態，要有效保護和挽救這一作為我國生物多樣性的關鍵類群，選擇合適的方法來研究其遺傳多樣性是非常必要的。In the present study, aflp ( amplified fragment length polymorphism ) markers was used to examine population of abies yuanbaoshanensis in order to understand the level of population genetic variation and genetic structure. the result would help to evaluate its evolutionary potentiality and the degree of being endangered and could provide scientific basis for making right protection strategy. high - quality dna was extracted using ctab method from those tender leaves of forty - three fully - developed trees in population abies yuanbaoshanensis
本研究選用一種高效的檢測遺傳變異的分子標記? ? aflp技術來分析元寶山冷杉種群的遺傳多樣性，旨在了解該種群在分佈區內的遺傳變異水平和遺傳結構情況；研究結果將有助於更清楚地認識這一瀕危類群的生存潛力和瀕危程度，而且可以為制定何種挽救和保護措施提供科學的依據。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。The party organization singled out the activists from the masses.
黨組織從群眾中選拔積極分子。On the base of degrading effect of cm, the paper investigated the correlation between microorganisms and nutrient salt in the water body. it showed that the correlation between ammonifying bacteria and nh3 - n was 0. 74 ; the correlations between nitrifying bacteria, denitrifying bacteria and no _ ( 3 ) - n were 0. 65, - 0. 53, respectively. the correlation between phosphorus bacteria and po _ ( 4 ) ~ ( 3 ) p was 0. 76
根據復合微生物對水質的降解效果，選擇其使用量為2g時，對水體中微生物功能菌群與營養鹽含量的相關性進行了研究，其中氨化菌與氨氮，硝化菌與硝氮，磷細菌與磷酸鹽均成正相關關系，相關性r分別為0 . 74 ， 0 . 65 ， 0 . 76 。A group of organisms having common ancestors and certain distinguishable characteristics, especially a group within a species developed by artificial selection and maintained by controlled propagation
屬一群擁有共同祖先和明顯特徵的有機體，尤指屬于同一物種的一群，通過人工選擇來發展，通過有控制的繁殖來維持I put foreward the concept gathering display field for the first time, and found that fire influences the gathering display field selection of great bustard to a certainty
首次提出集群求偶場的概念，並證明火燒對大鴇集群求偶場的選擇具有一定影響。The complete nucleotide sequence of the mitochondrial genome of f. limnocharis was detailedly compared with those of 5 other amphibians. the nucleotide sequences of 22 trna encoded by 6 amphibians mitochondrial genomes were combined and aligned to the homologous sequences of the 11 veterbrate taxa. using teleosts as outgroup, the phylogenetic analyses results show that mp, nj and ml trees all strongly support the monophyly of living amphibians with respect to other living tetrapods and favor a sister group relationship for caecilians and salamanders
我們在測定了澤蛙線粒體全基因組序列的基礎上，與已知其它的5種兩棲類進行詳細的比較分析，同時選擇了11種高等脊椎動物的線粒體全基因序列，以硬骨魚類做外群，用22個trna基因合併數據進行系統發生重建分析，結果表明mp 、 nj和ml樹都強力地支持現生兩棲類動物為單系群並且蠑螈類和蚓螈類為姐妹群關系（自引導值分別為92 、 99 、 100 ） 。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。Phylogenetic relationship of the sinibrama species was reconstructed using the cladistic method and morphological characters. c. monglicus monglicus, a. lini, p. pekinensis and m. terminalis were selected as out - group. and a total of 34 morphological characters were found variable among four valid species
用分支系統學方法，重建華鯿屬魚類的系統發育關系，運用外類群比較法，選擇蒙古? 、大眼近紅? 、鯿和三角魴為外類群，對34個形態學性狀進行了簡約性分析。All cohort data are affected by possible selection effects.
所有同期組群資料都受到可能發生的選擇作用的影響。A body of people selected or conscripted
被選出或徵召服役的一群人For the purpose of relieving and coordinating these conflicts, it is quite necessary and really significant to complete some works like : to push on area transfer of industrial, to push on area industrial schooling, to choose the leading industrial accurately, to push on coordinating development among regions, to push on area specialization division and realize update of industrial construction, to push on technology advance and technology transform and cultivate rational competitive superiority among the regions
為緩和並協調好區域發展中存在的這些沖突與矛盾，應做好如下工作：加快產業區際轉移與積極發展地區產業集群，選準主導產業並推動區域間的協調發展，推進地區專業化分工並藉此實現產業結構升級，加快技術進步與技術改造並藉此合理地培育起區域的競爭優勢。It was a band of voters coming to the rescue of their allies, and taking the camerfield forces in flank
原來這是一群選民起來支援他們的夥伴的。他們從側面向卡梅爾菲爾德的擁護者發動了進攻。Men often do not understand the subtle intricacies involved in purchasing gifts for different people at different times
粗枝大葉的男人們往往不懂得這些如何為不同時令，不同人群，選購不同禮品的錯綜復雜的細節。Brain information processing modeling based on neural - group selective theory
基於神經元群選擇理論的腦信息處理模型研究Noone ever claimed group selection is impossible, but it looks mathematicallyunlikely
至今尚無人宣稱說組群選擇是不可能的，但從數學的角度上來看是這樣。It also designs specialized genetic operator based on improved ga performance and adopts new initial population selection method
同時從改進遺傳演算法性能的角度出發，設計了專門的遺傳運算元，並採用了新的初始種群選擇方法。In the thesis, the key technical problems utilizing genetic algorithm and random method to design any - cast routing algorithms are explored. we designed and realized the any - cast routing algorithm based on genetic algorithm. resolved the problems concerned in the algorithms, such as the code model, the original genus selection, the fitness function, the crossover strategy, the mutation regulation, and the algorithm ' s convergence, avoidance of dead loop etc. aim at different network scales we propose two any - cast routing algorithms
論文探討利用遺傳演算法和隨機方法研究選播路由演算法的關鍵技術問題，設計實現了基於遺傳演算法的選播路由演算法，解決了演算法中的編碼模式、初始種群選擇、適應度函數、交叉策略、變異規則，以及演算法的收斂、路由死循環的避免和負載均衡等問題。The principle and the application range of ga are studied. based on the ergonomics ' alternant traits and the methods to set up contact points set or surface ' s form, the ga approach is brought forward for ergonomics form design the methods of genetic coding, initial colony forming, fitness function constructing and seed group selecting are discussed in detail
在探討了人機交互的特性、接觸點集和曲面形態的建立方法的基礎上，提出了將遺傳演算法應用於產品人機形態設計中的基因編碼、初始種群的產生、適應度函數的構造和種群選擇等運算方法。分享友人