查询词典 water flow

Basing on Fuzzy reasoning technology, this paper introduces the work flow of Gas water heater, and the trait of papilionaceous valve.

讨论了模糊推理算法在燃气热水器中的应用，此算法不依赖于被控对象精确的数学模型，主要是通过控制燃气流量即控制燃气蝶阀来达到恒定温度的目的。

Total nitrogen and total phosphorus in water were determined by microwave digestion and flow injection spectrophotometry using basic potassium persulphate as digestion solution.

以碱性过硫酸钾溶液为消解液，采用微波消解-流动注射分光光度法测定水中总氮和总磷。

A mathematical model of oil and water two-phase non-Darcy fluid flow in the direction of normal of the ellipses with initial pressure gradient is taken into account, which is a nonlinear equation with moving boundary and is established according to concepts of perturbable ellipses and equivalent developing regulations.

基于扰动椭圆的概念和等价的发展矩形的思想，建立了具有启动压力梯度的油水两相非达西椭圆二维渗流数学模型。

Mm, 5 μm and a UV detector. Elution was performed at a flow rate of 1 mL/min, with a gradient of methanol-acetonitrile-water starting at 80∶10∶10, increasing linearly to 86∶10∶4 in 35 min, then returning to the initial conditions in 5 min. Elution of phenacyl esters was monitored by absorbance at 254 nm. Pentadecanoic acid was used to be an internal standard.

分析所用色谱柱为ZORBAXSB C18柱，以十七酸作为内标，甲醇-乙腈-水为流动相，采用梯度洗脱(梯度洗脱程序为甲醇-乙腈-水由80∶10∶10在35 min内线性变化到86∶10∶4，然后在5 min内恢复到起始比例，流动相流速为1 mL/min)，通过测定苯乙酰甲酯在254 nm处的吸光度值来测定脂肪酸含量。

Results The optimum condition was μ-Bondapak C18 column with acetonitrile-water-0.05% phosphonic acid gradient elution system, 1.0ml min^(-1) flow rate, 267 nm. detection wavelength and 23~26℃ temperature. The analysis ended within 45 min.

结果 在色谱柱为μ-Bondapak C183.9mm×300mm，10μm；流动相A相为乙腈，B相为0.05%的磷酸水溶液；流速为1.0ml/min；检测波长是267nm及温度为23~26℃的条件下；经45min梯度洗脱，成功的分离分析了桂枝汤中的4个成分。

The phreatic surface is not a flow boundary, but simply a line of zero pore-water pressure.

浸润线不是水面边界，仅仅是一个0水头孔压线。

It has important effects for the stability of water conservancy building,the using of groundwater resource,the pollution controlling,the exploitation of rock oil and natural gas.And the needs of projects for those fields are increasing home and abroad.So the research of seepage flow becomes focuse.In this article,a saturated and unsaturated seepage model has been established which includes double variables:piezometric tube waterhead and saturation.

渗流现象是多孔介质中普遍客观存在的运动规律，其对水工建筑物稳定性、地下水资源利用、污染控制、石油天然气开采等工程问题均具有重要的影响，随着国内外在上述领域中工程需求的增加，渗流研究日益成为热点问题。

Many researchers have determined and estimated tree transpiration by using the methods of rapid weighting, steady-state porometer, photosynthesis system, whole-tree photometer, ventilated chamber, weighting potted-plant, sap flow measurements, lysimeter, water balance, energy balance, Bowen ratio, eddy covariance, Penman-monteith Method, and remote sensing.

针对不同的植被覆盖类型，国内外许多研究通过各种手段和方法，如快速称量、稳态气孔计、光合作用测定、整树容器、风调室、盆栽称量、液流测定法、蒸渗仪、水量平衡、能量平衡、波文比、涡动相关、彭曼联合法和遥感等来估算林木蒸腾作用。

Keywords sprinkler system; preact system;water-filling time;design flow

自动喷水灭火系统；预作用系统；充水时间；设计流量

Trace lead in environmental water samples was preconcentrated in site and determined by flow injection-flame atomic absorption spectrometry.

以Amberlite XAD-2树脂与双硫腙通过N N基键合的形式合成了一种新型螯合树脂(XAD-H2DZ)，采用IR和TGA技术对其特性进行了表征，并将其应用于微柱现场在线采样新技术中，实现了环境水样中痕量铅的在线原位预富集和实验室中流动注射-火焰原子吸收系统的联机测定。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。