density selection 中文意思是什麼
density selection
解釋
密度選擇-
The factors that in fluences the nest - site selection of great bustard mainly are the hight and density of vegetation
大鴇巢址選擇的影響因於主要為植物高度和植被密度。 -
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。 -
The great bustard selects the areas with abundant plant species. higher vegetative cover score. smaller proportion of bare area and taller plants to display on postfire grasslands ; the important factors that influence the great bustard to selection display fields are the proportion of hay, stipa baicalensis density and the thickness of hay on unburing grassland
在火燒地，大鴇會選擇植物種類數較多、蓋度較大、裸地比例較小及植株相對較高處進行求偶炫耀；在非火燒地，枯草比例、貝加爾針茅密度及枯草厚度是影響其求偶場選擇的重要因素。 -
However, one can increase its successful rate by modifying the surgical procedure and proper implant selection in those uses with poor jaw bone density
臨床上要在骨質較差的顎骨上植牙，可以藉由手術方式的調整與植體的選擇來提高成功率。 -
The knowledge model for pre - sowing plan design includes submodels of target yield calculation, variety selection, sowing or transplanting date, population density and sowing rate, fertilization and water management strategy
其中，播前方案設計知識模型包括產量目標、品種選擇、播栽日期、種植密度與播種量、肥料和水分運籌等。 -
3. the great bustard is big - sized bird that build nest on the ground and the nests distribute in sparse group. most of their nests locate on the middle slope of hillocks, especially on the southern middle slopes towards to the sun, the biggest gradient is not more than 8 ?, the most important 3 factors that determine nest - site selection are height of plant. density and thickness of hay. 4
大鴇是營地面鬆散型群巢的大型鳥類，多將巢築在海拔190 230m的草原崗坡的坡腰上，且以偏南向的朝陽緩坡的坡腰上為多，最大坡度不超過8 ，植被高度、密度和枯草厚度是決定其巢位選擇的3個最重要的因素。 -
The habitats for moving about of great bustard are hillocks on grassland. and they prefer to move about on the valleies of grassland during their breeding season. there are 4 main vegetation characteristic factors that determine the nest - site selection, the factors are the vegetation canopy, vegetation density, food and the height of plant. the great bustard selects the areas with higher vegetation canopy, vegetation density, plant species and insect quantity. most height of plants are below 20cm, but we also found they move about in tall grass occasionally
大鴇繁殖期活動棲息地為波狀起伏的草原漫崗地，多喜歡活動在海拔為170 300m左右，四周高、中間凹的漫崗凹地中。決定大鴇繁殖期棲息地選擇的主要植被特徵因子共有4個，分別為植被蓋度因子、植被密度因子、食物因子和植物高度因子。大鴇多選擇在植被蓋度和密度較大、植物種類和昆蟲數量較多及多數植物高度在20cm以下，但又不乏高草的地方活動。 -
In this thesis, a strain of associative nitrogen fixing bacteria with high nitrogenase activity was selected and the further studies for it were conducted, the results obtained are as follows : selection and identification of associative nitrogen fixing bacteria with high nitrogenase activity. the nitrogenase activities detected by means of the acetylene reduction method and growth rates tested by optical density of germ suspension under the x 400nm ( od4oo ) of all the strains tested except for the strain w12 reduced gradually due to frequent subculture during a year. however, the strain w12 has been showing high and stable nitrogenase activity and growth rate since it was isolated five years ago
固氮菌株的篩選與鑒定：測定從不同來源分離、收集和保藏的12個固氮菌株或分離物在不同保存時期的固氮酶活性和生長能力，發現多數菌株在初分離得到時固氮酶活性較高，但隨著轉接次數的增多卻逐漸喪失固氮酶活性，生長也隨之減弱，只有w12在五年前從埃及分離得到至今一直保持旺盛生長勢和較高的固氮酶活性， 48h內乙烯生成量可達1800nmol乙烯ml菌液以上，遠遠高於其它菌株，其生長量（ od _ （ 400 ）值）也遠遠高於其它菌株。 -
Cultivar selection had the greatest influence on yields while changes in either plant density, rate of plant nutrients or supplemental moisture did not improve yields
品種對產量影響最大，而密度、施肥量及補充灌溉並不影響產量。 -
In this paper, we will propose a method of feature selection and weighting scheme based on text set density, which is a way of measure of contribution to the text set density about some word
在這篇論文中，我們提出了一種基於文本集密度的特徵詞選擇與權重計算方案的方法。 -
A high - density molecular linkage map will be of value for studies designed to assay genetic variation, identify markers associated with dissect quantitative trait loci, and perform marker - assisted selection to improve agronomically important traits within plants
摘要高密度分子連鎖遺傳圖譜對分析植物遺傳變異、標記目標性狀、數量性狀定位和分子輔助選擇改良性狀均具重要價值。 -
The results showed that stem volume ( v ) and wood basic density ( bd ) were the most important traits in selection breeding for pulpwood of masson pine and, stand and individul selections shoud be based on the provenance selection
結果表明，馬尾松制漿造紙材的良種選育應以材積和木材基本密度作為主要指標，首先進行種源的選擇，在此基礎上進行林分和個體的選擇。 -
Li - ion and li - polymer battery are being widely used. their high energy density and long life make them the suitable selection for portable application
鋰離子和鋰聚合物電池由於能量密度高和長循環壽命等優點，在便攜式設備中得到了廣泛的應用。 -
The selection rule of the hysteresis width has been developed in order to make the thd and rms value of the output voltage to be the best with high efficiency, according to the principle of pulse density modulation
根據脈沖密度調制技術的原理導出了使輸出電壓失真度最小、有效值最大，系統效率也較高的環寬取值公式。 -
A new scheme of tracer selection is developed to improve the quality and the density of cloud motion winds
文中設計了一種示蹤雲選取演算法，以改善雲跡風的質量和密度分佈。 -
The city grid plan and construction, as well as the distribution design for buildings have close relation with the city ' s load density, in other words, the city ' s load density directly influences the capacity, layout, and equipment type selection of the city grid
摘要城市電網規劃、建設、建築的配電設計與城市電力空間負荷密度息息相關，其值的大小直接影響城市電網定容、布局、設備選型等。 -
During the research on substation location in rural power subsystem planning, builds space optimal model on the basis of theory of christaller ? center geography, which utilizing economic supply radius to optimize the number of substations based on the average load density. with the reference of the said number, uses the method of alternative address selection to achieve the optimal solution
在農村電網變電所布局子系統規劃研究中，以克里斯塔勒的中心地理論為基礎，建立了基於gis的變電所布局空間優化模型，該模型利用經濟供電半徑優化平均負荷密度下的變電所數量，並以此為參照，採用交替選址分劃法求得變電所的合理布局。 -
The estimated genome length of f. chinensis is about 2000 cm, so the map covered the 47. 5 % and 35. 6 % of the genome. the map with moderate density developed here provides a first step in producing a saturated linkage map of f. chinensis and open the way for marker assisted selection, comparative genomics and gene location and clone
遺傳連鎖圖譜的構建為分子標記輔助育種、比較基因組作圖、及基因定位與克隆奠定了基礎，並為今後其它海水養殖生物遺傳圖譜的構建提供了理論和實踐意義。本項研究填補了中國對蝦分子遺傳學與育種學領域的空白。 -
Tow practical realizations of the new approach is given : gis supported scene matching area selection based on the distribution of image content and gis supported scene matching area selection based on image edge density
本文提出了兩種具體的融合景物內容的景象匹配區選擇方法：基於gis和景物內容分佈的景象匹配區選擇方法；基於gis和邊緣密度的景象匹配區選擇方法。 -
This paper reviews the recent advances in yeast expression systems used in recombinant protein drugs produced by gene engineering, such as the selection of yeast vector system and yeast expression strain, construction of multi - copy strain, the high yeast cell density culture, the recent situation of yeast system applied in expression gene, defect of yeast expression system and countermeasure, etc
摘要本文主要從酵母載體系統的選擇、酵母表達宿主的選擇、多拷貝菌株的構建、高密度發酵培養酵母細胞、應用酵母系統表達外源基因的研究現狀、酵母表達系統的缺陷及對策等幾個方面綜述了近年來酵母表達體系在基因工程重組蛋白藥物開發方面的研究進展。
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