查询词典 selection precinct

PCC, and Ceratopteris richardii. Besides these findings, both the mechanistic and mechanistic-empirical combination models were used to analyze the adaptive evolution of amino acid sites in the CVNH domain. Our results showed that:(1) neither model reveals significant sites undergoing positive selection;(2) purifying selection has played a dominant role during CVNH evolution; and (3) the MEC model better fits the CVNH data set.

在此基础上，分别采用机理式模型和MEC模型(Mechanistic-empirical combination model)对CVNH结构域序列位点进行适应性进化分析，结果显示：1两类模型均未检测到统计上显著的正选择位点；2净化选择对CVNH起主导作用；3MEC模型更适合所研究的数据。

At the same time, we introduced negative selection, the affinity mature and clonal selection.

同时介绍了负选择和克隆选择算法。

Negative selection algorithm and clonal selection algorithm has been designed to make it applicable to the network intrusion detection system.

设计了否定选择算法和克隆选择算法，使其适用于网络入侵检测系统的要求的。

Through analyzing static clonal selection algorithm, this thesis proposes a multilayer dynamic clonal selection algorithm.

本文通过对静态克隆选择算法的分析提出了一个多层动态克隆选择算法。

Firstly, the recombinant engineering technology related vaccine preparation was set up, including: 1. the gene knock-out based on linear DNA target molecular in vivo; 2. the selection and counterselection technology of exogenous gene knock in definite site on chromosome; 3. the Gap-repair clone technology in vivo; 4. the recombination technology of single-chain DNA and the overlapping primer; 5. Set up the new selection and counterselection technology of neo-E.

本研究首先建立与疫苗制备相关的重组工程技术包括：①基于线型DNA打靶分子的大肠杆菌体内基因剔除技术，②选择与反选择外源基因定位敲入染色体上特定位点技术，③Gap-repair体内克隆技术，④单链DNA重组技术和重叠引物介导的DNA重组技术，⑤建立&抗生素-酶切位点&选择反选择技术新技术。

The whole process was called as negative selection. At last, we made a dynastical selection.

最后，将这些成熟的检测器放到实际的环境中进行检验，并且对检测器进行动态选择。

The paper mainly researches on the wind farm site's selection ,wind assessment, wind turbine selection and embattle,power generation estimation and so on,then analysis and compares the financial of the construction.

本文对风力发电场场址选择、测风评估、风力发电机组选型和布阵、发电量估算等方法进行了研究，并对此工程建设进行财务对比分析。

Methods: For 56 cases of arterial bleeding, performed angiography in the artery which was suspected to be the bleeding one, and then infused the embolus into the bleeding after super-selection to embolize it. For 17 cases of esophageal veins and fundic veins bleeding caused by the higher blood pressure in portal vein, we performed angiography in portal vein stem through puncturing the liver, found the bleeding spot, then infuse the embolus into the bleeding veins through super-selection to stop bleeding.

56例动脉性出血采用Seldinger氏法，经股动脉穿刺将导管选择插入可疑出血的动脉内先行DSA检查，明确诊断，再超选择插入出血动脉内注入栓塞材料，栓塞出血动脉。17例门静脉高压致食管胃底静脉曲张破裂出血，则采用经皮穿肝至门静脉主干行门静脉造影，明确出血部位，再超选择插管至出血静脉注入栓塞材料进行栓塞治疗。

In breeding practice, male gametophytic selection as a plant genetic improvement tool with many advantages such as can be shorten the breeding time limit and raise the selection efficiency.

在育种实践中，利用雄配子体选择对植物进行遗传改良，具有提高选择机率和缩短育种年限等优点。

Dr Gaulin thinks an evolutionary fight is going on between natural selection, which conserves metabolic expenditure and promotes longevity, and sexual selection, which willingly trades both for extra mating opportunities.

Gaulin博士认为自然选择的目标和性选择的目标在进化中互相冲突，自然选择倾向于保存自己，降低代谢强度，让自己活得更长；而性选择的目标是为了得到更多的交配机会，不惜以代谢强度和长寿为代价。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了