关键因子,key factor
1)key factor关键因子
1.A method for selectingkey factors in environmental impact assessment;环境质量评价中关键因子识别的方法研究
2.Research into the effects of the middle route of China s south-to-north water transfer project on water bloom in the middle-down stream of Hanjiang River and the countermeasures Part Ⅰ:An analysis of thekey factors generating water bloom in Hanj;南水北调中线工程对汉江中下游水华的影响及对策研究(Ⅰ)——汉江水华发生的关键因子分析
3.Original air monitoring data of Tangshan was analyzed with grey systematic principle, andkey factors and pollution tendency were evaluated, based on which air quality of year and was predicted.利用灰色系统原理,对唐山市大气环境原始监测数据进行了分析,从动态演变中找出影响大气环境质量关键因子并判断污染趋势;在此基础上对唐山市、大气环境质量中关键因子及污染趋势进行了预测,取得了良好效果。
英文短句/例句
1.Key Features Extraction from Algae Proliferation Process and Its Application;藻类增殖过程中关键因子的提取与应用研究
2.Clusters analysis of the key factors in tourism competitiveness of the seven provinces and cities in southeast China;华东七省市旅游业竞争力关键因子的聚类分析
3.On mechanism and important factors of agriculture scientific and technological achievemen conversion;农业科研成果转化机制与关键因子分析
4.Research on Key Factors in Biogas Production Process by Anaerobic Fermentation of Stalk秸秆厌氧发酵产沼气工艺中关键因子的研究
5.Screening of the Key Factors of Increasing Crop Production by Orthogonal Design正交试验法筛选风砂土上作物增产的关键因子
6.Principal Component Analysis on the Key Metabolism Factors for Bloom of Phyllostachys heteroclada and Neosinocalamus affinis水竹和慈竹开花代谢关键因子主成分分析
7.Study on Key Factors Affecting Seed Production and Contributing to Yield of Alfalfa (Medicago Sativa);紫花苜蓿种子丰产关键因子及产量构成因素的研究
8.Hypoxia inducible factor-1α:a key regulator for tumor biological characteristics低氧诱导因子-1α:调节肿瘤生物学行为的关键因子
9.Expression of Embryonic Stem Cells Key Transcription Factor Nanog in Bladder Cancer and Its Relationship with Cancer Stem Cells胚胎干细胞关键因子Nanog在膀胱癌中的表达及与肿瘤干细胞的关系
10.Analysis of industrial location factor is the key point to decide the allocation of industry.区位因子分析是确定工业布局的关键。
11.Study of the Key Factor IT Outsourcing Service of E-Government;电子政务IT外包服务关键因素研究
12.Study on the Key Factors of 3G-based E-commerce Systems;影响3G电子商务发展的关键因素研究
13.Cloning Ethylene Biosynthase Key Enzyme Upstream Regulate Factors in Banana Fruit;香蕉乙烯合成关键酶基因上游调控因子克隆
14.Expression of Inflammation Related Genes in ApoE Deficient Mice;ApoE缺失小鼠炎性因子关键基因的表达研究
15.Research on Key Techniques of Low-Density Parity-Check Codes Based on Factor Graph;基于因子图的低密度校验码关键技术研究
16.Cloning and Characterization of the Promoters of Key Starch Synthesis Enzyme Genes in Wheat (Triticum Aestivum L.);小麦淀粉合成关键酶基因启动子的克隆与特征
17.Case Study and Cause Analysis of Seed Company s Competitive Enhancement;种子企业竞争力提升案例分析与关键因素探讨
18.Several critical factors that affect men’s triple jump performance;影响男子三级跳远成绩的几个关键因素
相关短句/例句
key factors关键因子
1.With the grey treatment of rudimentary data during certain period, thekey factors were indicated.将灰色模型引入水环境质量评价中,通过对某个时间段内污染物原始监测数据的灰色处理,从动态演变中找出关键因子,客观地判定各污染因子所起的作用,并对各因子在下一个时间段的发展趋势作出判断,增加了评价的准确性。
2.In this paper, the present sifuation and causalagency of the water pollution of the Dongping lake are analyzed, and thekey factors of water pollution are found.本文通过对东平湖水污染的现状和成因进行分析 ,找出了东平湖水污染的关键因子 ,提出了对东平湖水污染关键因子的控制对
3.Fivekey factors affecting insect survival and development were determined: rice stem flour, wheat germ, yeast and rice chaff flour had an effect on the survival rate of larvae, sucrose and wheat germ affected the length of the larval stage, rice stem flour also worked on the pupal weight.采用15因子2水平正交试验,优选出1种二化螟Chilo suppressalis(Walker)人工饲料配方,筛选出影响二化螟发育的5个关键因子,分别是稻茎粉、麦芽粉、稻糠粉、酵母粉和蔗糖。
3)factor of key stone species关键种因子
4)associated-key-factor关键关联因子
5)key water quality parameters关键水质因子
1.Monitoring and analysis of phytoplankton and thekey water quality parameters in the Four Pearl River Openings and the nearby beach waters, PR China;珠江口四大口门及近滩水域浮游藻类和关键水质因子的监测与分析
2.Phytoplankton ecology and the analysis withkey water quality parameters in the Pearl River Estuary;珠江口浮游藻类生态及与关键水质因子分析
3.Phytoplankton and thekey water quality parameters (dissolved oxygen(DO),phosphors(PO 3- 4-P),nitrate(NO 3- 4-N)) were investigated and summarized fronm macroscopic and specific points in the offshore waters in the four Pearl River Opening(Humen, Jiaomen, Hongqili,Hengmen)and the nearby beach waters.从宏观上和特殊性对珠江口 4大口门虎门、蕉门、洪奇沥、横门及近滩为主的近岸水域进行浮游藻类发生与关键水质因子关联的研究 ,关键因子包括溶解氧 (DO)、活性磷(PO3 -4 -P)、硝酸盐 (NO-3 -N) ,得出二者间确有关联。
6)key degradation factors关键退化因子
延伸阅读
关键因子分析关键因子分析key factor analysis关键因子分析(key faetor analysis)种群动态研究方法之一，即从各种环境因子中寻找出对种群密度变动起主导作用因子(关键因子)的方法，系加拿大莫里斯(RF.Morris) 1959年首先提出的术语。在生命表资料分析中，关键因子分析经常用于估计每个单独死亡因子对整个世代死亡率的影响，用以比较在不同地方同种昆虫的生命表关键因子是否相同，以求得对昆虫种群过程最好的了解，已广泛用于昆虫种群动态的研究。主要有瓦利和格雷德韦尔(G.C.Varley%26G·R.Gradwen，l，60)分析法与波多勒和罗杰斯(H.podoler%26D.Rogers 1975)分析法。瓦利和格雷德韦尔分析法是将生命表中的数据从Ns、凡k，(i一1.2.··…n)等按世代换算成对数。其中N为死亡因子作用前或年龄级开始时的个体数，Ns为死亡因子作用后的存活数:k，为第:个死亡因子引起的死亡率;K~习左八为世代内各死 i二1亡因子引起的总死亡率。把K值和kl值分别标在纵坐标上，时间(或世代数)标在横坐标上，然后把各点依次连结起来，分别绘成各k值和K值的曲线，将各左值曲线与K值曲线作比较，找出k值曲线中与世代总死亡率(K值)曲线形状最相近似的k，这个左值死亡因素就是影响种群动态的关键因子。如图中人死亡率曲线与总死亡率K值曲线的波动趋势一致，即造成k:的因子.‘冬季损失”是影响这一种群数量的关键因子当有两个以上k值相似，难以从曲线形状比较找出关键因子时，须借助数学计算方法鉴别。┌───────────────┐│K黔‘/’\ ││ 毛刀:尸月户任│├───────────────┤│k.，溉八八、了『\ │├───────────────┤│\」乙V，”乙犷│├───────────────┤│_丫一{/\/『___俨 │├───────────────┤│万幼虫寄生物v。-一││K~、，口卜。。。一刀~一‘、· │└───────────────┘蛹期捕食作川骊寄生物l，55年份用各种人值与K值曲线的视觉相关鉴别关键因子(仿G心.Varjey%26G.R.Gradwell)波多勒和罗杰斯分析法把各个死亡率k‘值标在纵轴上，世代总死亡率K值标在横轴上，计算回归系数，b值最大的死亡因子定义为关键因子。此法注重线性的斜率而不是相关系数，在纵轴上各亚死亡率回归系数最大值接近于l，b值的总和为1o (周昌清)
