查询词典 number field

Then we introduce the parametrization of the equation of state of the dark energy and the reconstructions of three dark energy models - quintessence field, k-essence field, tachyon field.

然后介绍了暗能量物态方程的参数化以及利用参数化的物态方程重建的三个暗能量模型-quintessence模型、k-essence模型、tachyon模型。

Product series: Hydropower station/oil field series needle valve, changes the delivering necessary valve group, the ripple base pin valve, the oil field special-purpose needle valve, the oil field sample uses the needle valve, UN needle model valve and so on.

产品系列：电站仪表系列阀门，变送器配套阀组，波纹管针型阀，油田专用针型阀，油田取样用针型阀，美标针型号阀等。

The results indicated that soil evaporation around barley root was restrained effectively in sunny day when the positive electric field was applied. If the field voltage and interval time are constant, the electric field intensity will be different under the different pole distances, and the effect of boosting plant growth will be different by restraining evaporation and moisture.

试验结果表明：晴天施加正向空间电场可以有效地抑制大麦根系周围土壤水分的蒸发，当电压及间歇工作时间保持不变时，不同异极距下其电场强度不同，表现出的抑蒸聚水促生效果不同。

When the strength of the magnetizing field is lower than 40-50 oersteds, the curve showing the dependence of internal friction on magnetic field strength is almost flat, and becomes steeper for a higher field strength.

当磁场强度小於40—50奥时，内耗随着磁场强度而变化的曲线几乎是平的，其后则变化较快，在超过约150奥时，内耗的变化又渐越平缓，最后达到一个差不多恒定的最大值。

The specimen is placed in a space with nulled field (such as produced with Helmholz coils) and then subjected to an alternating magnetic field which is then reduced gradually to zero by decreasing the current of the field coil or by pulling the specimen from the coil.

样品放置在一个零磁场(如亥姆霍兹线圈产生的场)作用空间内，然后作用以交变磁场，该交变磁场通过减少激励线圈或将样品从线圈中逐渐抽出使得场强逐渐减小至零。

As it can reduce the quantity of equipment for field surveying and of field workers, and is able to exercise software control and automatic collection of field data by deformation surveying, the system helps achieve automatization, digitalization and computerization of observation by dam deformation network, ensure the accuracy and high efficiency of surveying results, and alleviate work intensity for survey crew.

徕卡多功能全站仪测量软件系统摒弃了传统断面仪外业测量时的繁琐配置和定位缺陷，减少了外业设备和作业人员编制数量，实现了变形测量野外数据采集软件控制、自动采集等功能，从而达到大坝变形网观测自动化、数字化、计算机化，保证了测量成果的准确性、高效率性，减轻了测量人员的劳动强度。

This study considers the effects of ventilation system using the residential facilities to the transmission mechanism of indoor aerosol in the residential quarantine period space for infective diseases. This study focuses on the effect of the design of ventilation system on the internal flow field and the removal of contaminant pollution. A computational fluid dynamics software-FLUENT 6.2 is employed to simulate the internal airflow field of the residential quarantine period space. The Carbon dioxide (CO2) is adopted as the index of contaminant source. Three layouts of ventilation system are simulated and the airspeed field, the temperature distribution, and the contaminant distribution are analyzed to find the best ventilation system for the residential quarantine period space.

本研究考虑传染性疾病在居家隔离空间使用一般家用环境控制设备时对室内的气悬感染会有何影响，本文主要分析不同通风设计时对居家隔离空间内部气流之影响，并将国内外现有的规范设计方式做一系列之比较以供参考，并以商用套装软体FLUENT6.2分析居家隔离空间内部流场分布情形，模拟中以二氧化碳（CO2）作为病患所呼出含有病菌空气的指标，模拟案例分为三种主要的通风模式，并分析速度、温度与污染物浓度分布情形，以得到最佳的居家隔离空间通风配置方式。

In the framework of effective field theory, we have calculated the relation of Curie temperature and crystal field and discussed system's critical and related magnetic properties in the system of three-dimensional cubic lattice in the presence of bond dilution and random crystal field.

系统的居里温度随着晶场的增加而单调递减并且在相图中出现了三临界点，而键稀疏对三临界点有着明显的抑制作用，当键稀疏浓度降低到阈值pc 的时候系统将出现诱导磁有序，此时晶场浓度无论如何取值，该系统在一定的晶场范围内 0 ≤？

This text regards SWOT matrix as tools, has analysed inside external environment condition of the community of Shengli Oil Field and current management system, have put forward the guidelines of the development model of community of Shengli Oil Field, from the state policies, regional between economic development and resource type enterprise rule of development several respect is it separate enterprise run social urgency and necessity of function to re-recognize, have established the development model of the community of Shengli Oil Field, leading industry and ensured the measure.

本文以SWOT矩阵为工具，分析了胜利油田社区的内部外部环境和现行的管理体制，提出了胜利油田社区发展模式的指导思想，从国家政策、区域经济发展和资源型企业发展规律几个方面重新认识分离企业办社会职能的迫切性和必要性，确立了胜利油田社区的发展模式、主导产业及其保障措施。

The analysis shows that with given grid size higher accurate difference scheme can give higher resolutions with wider range of scales, or with given accuracy large grid size can be used for the higher accurate difference scheme. The second part is the numerical simulation of two-dimensional axisymmetric jet. The simulation results show the structure in the near field and the initial transition. In the near field, Kelvin-Helmholtz instability leads to the formation of vortex ring, and nonlinear growth leads to the merging of vortex ring. This is the main instability form. Under the assumption of axisymmetry and two-dimensional computing conditions, the results are applicable only in the near field.

第二部分采用高精度的差分格式对二维轴对称射流进行了数值模拟，模拟结果显示了射流流场结构和涡结构的发展过程，在射流流场近区，K-H失稳导致涡环的产生以及非线性效应的增长导致涡环的对并是射流失稳的主要形式；分析指出在轴对称假设下的射流数值模拟只适用于射流近区的分析。

I was up all night because I was in pain, she said.

我整夜，因为我在疼痛，她说。

A crow caws /craoks.

乌鸦叫。 51-论文网