选择压

结果表明：作为选择压的沉降速率与反应器中SV值和MLSS成反比关系；

Results showed that settling rate is in inverse ratio to the value of SV and MLSS .

但在转Bt基因棉的持续选择压下，棉铃虫的抗性基因频率近些年有上升趋势。

However , there has been an upward trend of the resistance gene frequency in H. armigera due to continuous selection pressure from the Bt cotton in recent years .

试验结果证明，以巴西蕉（MusaAAAgroupBrazil）为材料，香蕉枯萎病菌毒素为选择压，通过多重诱变筛选，巴西蕉不定芽的耐毒性逐步提高并从中获得耐毒素诱变株。

The results proved that the toxic tolerance of adventitious buds of Musa AAA group Brazil increased under toxin stress in multiple mutation screening , then the toxin tolerant mutant was successfully obtained .

综述了影响好氧颗粒污泥形成的几个关键因素，如进水底物、COD负荷、水力剪切力和溶解氧浓度、选择压、温度、pH值和碱度等，并详述了相关应用研究进展。

Summarization was made on key factors affecting the formation of aerobic granular sludge , such as influent substrate , COD loading rate , hydraulic shear and DO concentration , selective pressure , temperature , pH , alkalinity , seeding sludge , and type of reactor , etc.

结合最新研究进展总结了影响UASB中颗粒污泥形成的因素，如废水性质、选择压、碱度等，并且介绍了几种加快UASB中颗粒污泥形成方法。

Factors to affect the granular sludge culture in UASB reactor were reviewed , such as character of waste water 、 selection pressure and alkalinity . Furthermore , some effective methods of quicking the granular sludge development were introduced .

然而，长期处于Bt杀虫蛋白的选择压下势必会影响到棉铃虫对Bt棉花的耐性和抗性，长期的抗性监测表明棉铃虫在田间对Bt棉的耐性不断增强。

However , the tolerance and resistance of CBW to Bt cotton will be influenced under this high level selection pressure of Bt toxin . The resistance monitoring in long-term showed that the tolerance of CBW to Bt cotton has constantly increased in the filed .

对‘GF43’李叶片侵染时间、共培养时间、抑菌素种类和浓度、不同选择压等遗传转化影响因素的研究。

Factors as leaves infection time , total training time , type and concentration of Su-inhibitory , selection pressure , and so on , were selected for transformation system for ' GF43 ' .

但是如何根据土质条件选择压桩力？

But how to choose final pressure of pile according soil behavior ?

沉降速率作为选择压对好氧颗粒污泥性质影响

Influence on Property of Aerobic Particle Sludge When Settling Rate as Selection Pressure

网状内皮组织增生症病毒的分子流行病学调查及其在宿主免疫选择压下的分子变异

Molecular Epidemiology and Evolution of Reticuloendotheliosis Virus under the Host Immune Selective Pressure

家蝇对溴氰菊酯的敏感性变化与药剂中溴氰菊酯的选择压有关。

The changes of susceptibility to deltamethrin were correlated with the selection pressure .

带选择压的兰切斯特战争模型

The Lanchester Mathematical Model with Battle Selection Pressure

内含子广泛存在于真核生物基因组中，其选择压小于外显子，因此变异程度高于编码序列。

Introns are widely distributed in eukaryotic genomes and more variable than coding sequences .

熵和自然选择压及其在林木群体遗传学中的应用

Entropy and natural selection pressure and their applications to population genetics of forest tree

重金属污染对昆虫种群的遗传进化施加着强大的选择压。

Heavy metal pollution exerts strong selection pressures on the evolution of insect populations .

实验结果可用于合理选择压水堆安全壳喷淋系统参数。

The experimental results are useful for rational selecting parameters of containment spray system of PWR .

好氧颗粒污泥是活性污泥微生物在各种选择压下通过自固定方式形成的结构紧凑的生物颗粒聚集体。

Aerobic granules are compact microbial aggregate that formed by activated sludge under various selection pressures through self-immobilization .

因此植物激活剂不会对病原菌产生选择压、不易产生抗药性，且对环境友好。

Therefore plant activator can not generate selected pressure and drug resistance , and is friendly to the environment .

气井修井作业中，如何确立压井参数和选择压井方法，对高压气井修井作业举足轻重。

During gas well workover treatment with high pressure , it is very important to determine kill parameter and select kill method .

携带遗传转化质粒的农杆菌在无抗性选择压二次悬浮下的质粒稳定性

Genetic Transformation Plasmid Stability of Agrobacterium tumefaciens under the Conditions of the Second Suspend Liquid Culture and without Selective Pressure of Antibiotics

低选择压有利于生物多样性的产生，系统中过于优势的单一成分抑制多样性。

Low selective pressure makes for the spontaneity emergence of biodiversity , the excessively dominant unitary element in a system restrains the diversity .

加强杂交后代长粒形的选择压，并注意穗重和穗数可明显改进粒长和长宽比。

Paddy grain length and ratio of length to width could be improved with heavier panicle and more panicles in higher selecting pressure .

杂草抗药性的形成主要由杂草本身的生物学、遗传学特性和外界因素除草剂的选择压及单一的种植制度造成；

The form of resistant weeds is mainly because of its own biological and genetic characteristics , selection pressure of herbicide and single plant system .

结果表明，合理地选择压差以及包装箱开孔大小对葡萄的冷却速度、冷却均匀性起着关键的作用。

The results of this test proved that the reasonable choice of pressure and air vent hole was the critical element for cooing velocity and cooling uniformity .

籼粳稻的进化应是包括海拔在内的多种环境因素的自然选择压下，不断累积、逐步演变而完成的。

Evolution of Hsien and Keng rice was influenced by various environment factors and was a progressive and continuous process under the pressure accumulation of natural selection .

对压电式加速度传感器与驻极体传声器进行了深入的研究，比较了两者的优缺点，确定了选择压电式加速度传感器作为整个测量系统的传感器的正确性。

Piezoelectric acceleration sensor and the electret microphone has been deeply studied , compares their advantages and disadvantages , and selects piezoelectric acceleration sensor as the sensor of the measurement system . 3 .

在序批式反应器中以普通活性污泥驯化而得的好氧颗粒污泥为接种污泥，葡萄糖为碳源，研究作为选择压的沉降速率对好氧颗粒污泥性质的影响。

Influence on property of aerobic particle sludge was studied when settling rate as selection pressure , and aerobic particle sludge as inoculation sludge domesticated by activated sludge in sequence reactor , and glucose as carbon source .

以压电智能结构振动控制效果为目标，将两个度量指标加权结合，构造了一种新的度量压电智能结构可控程度的指标，并以此为选择压电执行元件最优位置的依据。

In view of effectiveness of active vibration control for piezoelectric intelligent structures , a new index is developed to measure the structural controllability , which is used as the basis of selecting the optimal piezoelectric actuator locations .

通过对所选择压电陶瓷微位移器的电压&位移关系进行实验分析，提出了针对刀具磨损补偿系统的有效方法来消除压电陶瓷非线性、迟滞和蠕变所带来的影响。

Through experiments , we analyze the relationship between voltage-displacement of piezoelectric ceramic micro-displacement device which we choose , and propose an effective method for tool wear compensation system which can eliminate the influence of piezoelectric nonlinearity , hysteresis and creep .

随着通信和电力事业的高速发展以及移动电话、微波炉、电脑等电气设备的广泛应用，外部电磁环境急剧加强，对生物的遗传和变异产生强大的选择压。

With the rapid development of both communication and power industry and the wide use of mobile phones , microwave ovens , computers and other electrical equipments , the electromagnetism in the environment strengthened greatly . This situation would inevitably put strong selective pressure on biological heredity and variation .