To what extent competition determines the composition of a community and the density of particular species has been the source of considerable controversy.
竞争对于一个群落的组成和特定物种的密度的决定程度有多大，一直是相当有争议的问题。
What's more, the temperature and density of the plumes could indicate a warmer, watery source beneath the surface.
更为重要的是，探测所得的温度和气流的密度表明，在星球表层以下有温暖潮湿的来源。
Laser as a heating source of high energy density of accurate control, can carry out multiple-sort strengthening treatment to the metal surface.
激光作为一种精密可控的高能量密度的热源，可对金属表面进行多种强化处理。
Some cars equipped with high strength discharge headlights HID, the device through its pre designed electrical system generated high voltage arc discharge generated high density light source.
有些汽车装备了高强度放电前大灯hid，该设备通过其预先设计的电子系统产生的高压电弧放电生成高密度光源。
A compact ECR plasma source, the strengths of which are its ultra low electron temperature, its low pressure and its ultra low density, was developed and built for such a simulator.
本文就是为空间电离层环境模拟器研制的扩散型极低气压、低电子温度和极低密度的紧凑型电子回旋共振等离子体源的研制。
It is shown that the plasma density increases with increasing workpiece voltage, source voltage and gas pressure.
结果表明，随着工件阴极电压、源极电压和气压的增加，等离子体密度增大。
Sink: source ratio could be affected by plant density or fertilizer supply level.
库源比既受肥料水平的影响，也受密度的影响。
The normalized total gradient method of gravity presented by V. M. Berezkin et al is a method for determining field source and density interface by means of gravity data.
等人提出的重力归一化总梯度法是一种利用重力数据来确定场源以及密度分界面的方法。
The ultrashort pulse laser plasma source works in ultrashort time, with high energy density and is able to be tuned, controlled easily.
超短脉冲激光等离子体源作用时间超短，能量密度高，可调谐，易于控制。
The advanced photon source, especially the synchrotron radiation photon exited from undulator is equipped with extremely high power density.
第三代同步辐射光源，尤其是由波荡器引出的同步辐射光，具有极高的功率密度。
Higher order waves generated by a moving source in a two-layer inviscid, incompressible fluid of finite depth with small density difference were studied.
研究了运动点源在无粘、不可压且具有小密度差的两层有限深流体中生成的高阶波动。
The density logger consists of a radiation source.
密度测井仪包括辐射源。
The source and detector, however, are arranged to be sensitive to the density of material in the annulus and can distinguish between fluid and cement behind the casing.
与密度测井不同的是，其伽马射线源和探测器的布置方式能使它们对井内环形空隙中物质的密度很敏感，可以将套管外面的流体和水泥区分开来。
Palusinski argues that energy density is an even better measure than storage capacity of how effective a power source can be.
保卢辛斯基强调判断一种能量源多么有效方面，能量密度是比存储能力更好的方法。
The calculated results show that strong vibrating source, low gravitational level and sound medium with large density and small sound speed will enhance the levitation ability.
结果表明，提高声源强度、降低重力水平或者采用密度大声速小的气体介质有利于提高声悬浮能力。
The power density spectrum of an inner-phase-modulated optical fiber resonator is analyzed theoretically and experimentally, which is valid for any source coherence time.
从理论上详细分析了光纤环形腔有内相位调制时的输出光电流功率谱密度函数，该理论对任意相干长度的输入激光光源都是有效的。
It has much characteristic such as high temperature, large density of heat discharge and controlled atmosphere, and it supplied a new heat source.
它具有温度高、热流密度大、气氛可控等特点，它为钼的提取及冶炼提供了一个新的的热源。
Objective In the present study the source and quantitative analysis of medical images and the acquisition conditions of the quantitative analysis of optical density have been discussed.
目的本文阐述了医学图像的来源和定量分析，并着重对进行光密度定量的显微医学图像的获取条件加以讨论。
The hybrid electric power source composed of Ultracapacitor and storage battery may satisfy the demands about power density and energy density proposed by many types of electric facilities.
它与蓄电池组合成的混合动力电源，可以满足多种用电设备对电源提出的功率密度和能量密度的要求。
Self-propagating high-temperature synthesis, the study of the iron content, to suppress the density of the source replace the barium, lanthanum-doped magnetic field to stimulate the effects of SHS.
自蔓延高温合成中，研究了铁粉含量、压制密度、钡源取代、掺镧、磁场激发对SHS的影响。
The ion energy and the density of beam flux of cold cathode ion source were measured by pentagrid probing and Faraday cup.
采用五栅网离子能量测量装置和法拉第筒测量了宽束冷阴极离子源的离子能量和离子束流密度。
Direct methanol fuel cell (DMFC) is an ideal portable power source in the future because of the simple system, high energy density and convenient fuel storage and transportation.
直接甲醇燃料电池(DMFC)具有系统简单、比能量高、燃料便于储运等优点，是未来理想的移动电源系统。
The suggested system makes use of a single phase HFAC pulse density modulation(PDM) converter as the interface to connect energy storage unit and power source for induction motor drive system.
系统采用间接矢量控制技术，通过高频交流脉冲密度调制接口变换器，对功率进行协调控制。
To the source to the indoor radon, have put forward and reduced the density measure of indoor radon effectively.
针对于室内氡的来源，提出了有效降低室内氡的措施。
Methods: to employ an electrothermal drier as a heat source and measure density of grey scale in film with a densitometer.
方法：使用电热干燥箱作热源，用密度计测量胶片上各级灰阶的密度。
A radioactive source is used to bombard the rocks surrounding the wellbore with gamma rays. By counting the backscattered gamma rays, the density of the subsurface rock can be computed.
利用放射性源的伽马射线轰击井眼周围的岩石，通过对反散射伽马射线计数，可以计算出地下岩石的密度。
The rate and distortion of distributed source vector quantization are characterized and analyzed through the point density function of a quantizer.
研究分布式信源量化维数与量化性能之间的定量关系。
Analysis shows that the system not only can quantitatively predicate the spatial distribution and temporal change of the dust, but also the source, density in the air, transfer and deposition.
分析表明，预报系统不仅能定性预报沙尘天气的空间分布与时间演变，而且能定量预报沙尘源地、大气中的沙尘浓度、沙尘的输送以及沉降。
Soil texture, bulk density and water applied methods are critical factors influenced point source infiltration.
土壤质地、滴头流量、土壤密度以及供水方式等因素对于点源入渗有着一定的影响。
Soil texture, bulk density and water applied methods are critical factors influenced point source infiltration.
土壤质地、滴头流量、土壤密度以及供水方式等因素对于点源入渗有着一定的影响。
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