種群效應 的英文怎麼說
中文拼音 [zhǒngqúnxiàoyīng]
種群效應
英文
population effect-
We constructed fences using 2 x 2 x 2 factorial design to examine the effect patterns of food availability, predation and interspecific competition on population dynamics and spatial behavior of reed voles, microtusfortis. we expected to test two hypothesises : ( 1 ) availability of high quality food, predation and interspecific competition have independent and addictive effects on population system dynamics for small mammalia herbivore ; ( 2 ) availabiliry of high quality food could reduce home range and aggressive behavior level between individuals of microtine, predation and interspecific competition have independent effects on spatial behavior of microtine
以2 2 2析因實驗設計，在野外圍欄條件下，探討食物可利用性、捕食及種間競爭對沼澤田鼠（ microtusfortis ）種群動態及空間行為的作用，旨在檢驗下述特定假設： （ 1 ）高質量的食物可利用性、捕食及種間競爭對植食性小哺乳動物種群系統動態具有獨立的和累加的效應； （ 2 ）高質量的食物可利用性可降低田鼠個體間的攻擊行為水平，並導致其巢區減小；捕食與種間競爭對田鼠的空間行為亦有獨立的作用。This note studies two - species metapopulations dynamics com mon model considering of the affect of interspecific interaction to colonization and extinction rate and rescue effect, demostrates the conditions of two specie s capable of coexistence in the competitor, predator - prey or mutualist system
在考慮種間相互作用對定居率和絕滅率的影響以及逃避效應的基礎上建立了兩物種相互作用的異質種群動態的一般模型，通過模型分析說明了競爭、捕食和互惠共生系統中兩物種能夠共存的條件This paper summarized the disturbance effect of rodents on soil ( pedogenesis, patch formation, and physical and chemical properties ) and vegetation ( species diversity, productivity, and seed dispersion ), aimed to illustrate the contributions of rodents activities to desert ecosystem
本文主要從鼠類活動對土壤（包括土壤發生過程、土壤斑塊的形成、土壤理化性質）和植物群落（包括物種多樣性、生產力、植物種子）的擾動效應做了歸納總結，旨在闡明鼠類在荒漠生態系統中的作用。Heredity modes of 6 traits were studied by analysis of population genetics, by the method of family combination analysis, by the methods of proband ' s sib analysis, segregation analysis, the threshold model of polygenes, and analysis of typical family trees, according to the data of the 72 families. the relative importance between genetic and environmental effect on each character was evaluated by comparing the coherence of twins. gene frequencies of 5 genetic characters, calculated from han group in huhhot, were compared with other groups by u - test so as to study the population or nationality difference in heredity
採用群體遺傳學分析、家系組合分析法、先證者同胞法、分離分析法及多基因閾值模式分析方法對所得家系資料進行了統計學分析，結合家繫系譜分析探討了上述6項特徵的遺傳方式；通過雙生子一致率的比較，對上述特徵的遺傳與環境效應的相對重要性進行了評價；計算了呼和浩特市漢族群體5對遺傳性狀的基因頻率，採用u檢驗方法與相關文獻報道的其他群體進行了比較，探討了不同種族間或民族間的遺傳差異性。Any of the reciprocal actions or effects, such as symbiosis, that can occur in a community
（種間）相互作用出現在群落中的相互作用和效應，例如共生現象Density - dependent effects of the experimental population of spider mite schizotetranychus bambusae reck acari tetranychidae
竹裂爪蟎實驗種群密度效應研究From the aspects of agricultural economic and environmental ecological effects, were the effects and mechanism of rare - earth micro - fertilizer to improve the growth, development, quality and yield of the crops ; the adjustment of crops growth by influencing the number of microbial population in soil district and the function of the soil dehydrase, alkaline phosphatase, urease and sucrase ; the ecophysiological effects of alleviating the injure of acid rain, ultraviolet radiation, heavy metal on crops were illustrated ; the sureness of bee ' s use in agricultural was provided, according to the rule of the distribution and enrichment of be in crops
摘要從農業經濟效應和環境生態效應二方面，論述了稀土肥料促進作物生長、發育，提高作物產量，改善作物品質的效應與機理；影響土壤區系中微生物種群數量和土壤脫氫酶、堿性磷酸酶、脲酶及蔗糖酶的功能，繼而反饋調節作物生長；緩解酸雨、紫外輻射和重金屬傷害作物的生態生理學效應；並以稀土在作物體內分佈與富集規律為參考，探討了稀土農用的安全性。In this paper two - generation reproduction toxicity of fenvalerate, a - cypermethrin, chlorpyrifos, and triazophos was tested in a 21d period with water flea, daphnia magna, . the toxicity indicator included longevity, body length, days to first brood, days to first pregnancy, number of youth per female, intrinsic rate of natural increase ( r ), and number of broods per female. accordingly, the dose - response relations and relations between the chronic responses and enzyme levels were investigated
為了確定水蚤體內生化指標與慢性毒害效應之間的關系，特別是在低濃度暴露狀態下生化指標改變的生物學意義，以便能更準確預測早期農藥對水蚤種群的潛在危害，本文以浙江省常用殺蟲劑氰戊菊酯、高效氯氰菊酯、三唑磷和毒死蜱進行了大型蚤（ d . magna ）的急性和慢性毒性試驗（包括子代水蚤的恢復試驗） 。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。The regulation effect of cannibalism in the dynamics of the population model
自相食對種群的調節效應According to the environment features inside and outside caves in guizhou and current development of cave creature study home and abroad, making use of karstology, environment science, ecology, zoology and the theory of human - land relation, and through combining microscale with macroscale, component with system, field investigation with interview, and theory with experiment, the author chooses guiyang, anshun, pingba and honglin, where human activities are frequent and strong, to make a macroscopical investigation on animals and environment, and selects some typical caves in honglin to make a comparison study on environment features inside and outside the caves, biodiversity and present situation of plant society, and adaptability of cave animals to environment, and analyzes theoretically the effects of human activities on the cave animals and evaluates objectively the development potential of cave animal resource
根據貴州喀斯特洞內外環境和國內外洞穴動物研究現狀，運用喀斯特學、環境學、生態學、動物學以及人地關系等相關理論，採取點面結合，特殊與一般結合，系統與要素結合，實查與訪問結合，理論與實驗結合的方法，選擇貴陽、安順、平壩、紅林等人類活動強度大的區域進行面上動物和環境的調查，選擇紅林地區代表性的洞穴對洞內外環境、物種多樣性及群落現狀、動物對環境的適應等進行對比研究，理論分析人類活動對洞穴動物的影響和客觀評判人類活動的洞穴動物效應與動物開發潛力。Finally, simulation experiments, the different parameters set out under the track, population size of the different fitness value of statistical analysis, the results showed that use of genetic algorithms in robot path planning is effective and feasible
最後通過模擬實驗，對不同參數設置下規劃出的路徑進行比較，不同種群大小的適應度值進行統計分析，結果表明，遺傳演算法應用在機器人路徑規劃中是有效的，可行的。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The bisonc burnup library is replaced to facilitate the computation of the burnup process with complicated burnup chains. we have made and evaluated the new library ( hendl ) which contains 139 kinds of nuclides with 175 groups for neutron and 42 groups for gamma, 15 kinds of neutron reactions and p0 - p5 expansion. the revised code which we call bus - id is more adaptable to the computation of hybrid reactor for its fuel breeding and the transmutation of the hlw
並且在一維輸運及燃耗計算程序bisonc的基礎上，提出用新的數據庫（ hendl ）代替原有的bisonc數據庫， hendl庫考慮了更加全面的燃耗過程和多種燃料循環方式，通過修正讀入的核截面數據庫中的參數，考慮共振自屏效應，製作並且評估了新的含有139種核素、多種反應截面、 175群中子42群光子、 p _ 0 - p _ 5展開的中子反應數據庫，開發出新的程序bus - 1d ，使得更能適應聚變?裂變混合堆的燃料增殖、高放長壽命核廢料（ hlw ）的嬗變等計算的要求。To optimize the multi - phase homing trajectory, an improved adaptive genetic algorithm ( iaga ) was proposed, which could efficiently improve convergence speed and avoid the occurrence of premature
在對分段歸航軌跡的優化中，提出了改進自適應遺傳演算法，該演算法通過增加「強化」運算元、改進對種群「早熟」程度評價指標等，有效地提高了收斂速度、避免了「早熟」現象。The metabolism activity and distribution pattern of am fungi were studied in the field. the results showed that the tuber fresh weight was greatly increased with intraradical alkaline phosphatase ( alp ) activity and extraradical hyphal density greatly improved
研究中還觀察到，起源相同的2種am真菌對甘薯的效應不同，表明同一am真菌群落中的不同成員間存在生態位的分異。To evaluate the effects of drift in the classical sense, the population size should be known.
要用正統含義估計播遷的效益，就應知道種群的大小。Firstly, this part analyzes location, natural conditions and natural resources, population and labors, socio - economic elements, and the impacts of global political and economic environment change on unbalanced development of japanese regional economy. secondly, through analysis on regional development before the meiji reformation, industrialization, formation of dual structure and regional development after war, this part puts forward that unbalanced development is an objective law and regional development policies of government ca n ' t change structure of unbalanced development essentially. finally, this part sums up motive mechanism of unbalanced development of japanese regional economy, including location directional feature, scale economy, congregation and diffusion economy, putting forward that the overall effects of the three types of mechanisms stated above can be summarized as industrial group effects, which is also the important mechanism of unbalanced development of japanese regional economy
首先，分析了區位條件、自然條件與自然資源、人口與勞動力條件、社會經濟條件、國際政治經濟環境的變化對日本區域經濟非均衡發展的影響；其次，通過對日本明治維新前的地域開發、工業化及其二元結構的形成以及戰后的地區開發等過程進行了剖析，認為區域經濟非均衡發展是一個客觀規律，政府的地區開發政策並不能從根本上改變非均衡發展的格局；第三，總結了日本區域經濟非均衡發展的動力機制，主要包括區位指向性、規模經濟、集聚與擴散效應，指出上述三種機制的綜合作用可以概括為產業集群效應，即產業集群也是日本區域經濟非均衡發展的重要機制。( 5 ) ga ' s operators are improved to reach better evolution effects, such as choosing proper fitness function, using 2d equal - block crossover and multi - bit mutation, expending the population size to reach better evolution effects. the structural results are effectively made better
（ 5 ）本文提出了二維均勻分塊交叉、 「擴大種群」的進化機制，引入多點變異，保證了ga種群適應度平均值的有效進化和群體的多樣性，實現了拓撲結構的遺傳進化。Wenzhous logistic industry should take advantage of its superiority and the specific cluster effect to speed up the informationalization of the logistics, to strengthen the logistic industry so as to promote the upgrade of wenzhou ' s economy
溫州物流業應利用已有的各種優勢和獨特的集群效應，加快物流信息化進程，將物流產業做大做強、助推溫州經濟向史高層次邁進。分享友人