Research on Technique to Reduce Spray Droplets Drift;
减少农药雾滴飘移的技术研究
Wind tunnel can provide a well controlled environment in which drift measurements could be made over a range of wind speeds and spraying conditions.
飘移性是衡量喷雾质量的重要标志之一。
Since its special spray pattern, the droplets atomized by a spinning disk have high potential to drift than that produced by hydraulic nozzles.
采用转子式低量喷雾方法能使雾滴均匀分布 ,但由于转子喷头特殊的雾型 ,雾滴相对压力式喷头更容易飘移。
In this paper, a simple measure for eliminating the drift instability of the multi-transmitting formula in numerical simulation of wave motion is first presented based on a physical interpretation of GKS stability criterion in the numerical solutions of initial-boundary value problems of the hyperbolic partial differential equation.
基于对双曲型偏微分方程数值解稳定性的ＧＫＳ（Ｇｕｓｔａｆｓｓｏｎ， Ｋｒｅｉｓｓ ａｎｄ Ｓｕｎｄｓｔｒｏｍ）准则的物理解释，本文提出了在波动数值模拟中消除多次透射公式飘移失稳的一卜简单措施，并用波源问题和散射问题的数值试验检验了建议的稳定措施的有效性。
One type of the numerical instabilities, the drift instability, in implementation of MTF into the numerical simulation by the time-step integration is studied and results in a simple measure for eliminating this type of instability based on a physical interpretation of GKS stability criterion on numerical solutions of initia L-boundary value problem.
基于对双曲型偏微分方程数值解稳定性的 ＧＫＳ （Ｇｕｓｔａｆｓｓｏｎ， Ｋｒｅｉｓｓ ａｎｄ Ｓｕｎｄｓｔｒｏｍ）准则的一种物理解释，提出了在波动数值模拟中消除多次透射公式飘移失稳的一个简单措施，并用波源问题和散射问题的数值试验检验了这一措施在稳定实现多次透射公式中的有效性。
To analyze the drift affecting factors and the droplet drift dynamics could not only provide the theoretical basis for the research of the droplet drift control and the spraying equipment, but also increase the efficiency of pesticide applications, reduce the droplet drift and improve the environmental protection.
农药雾滴飘移是造成环境污染、农药流失、农药有效利用率低的一个重要原因,分析影响雾滴飘移的主要因素,研究农药雾滴飘移机理,不仅可以为控制雾滴飘移的喷雾部件的研究提供理论依据,同时对提高农药的施药效果,减少农药飘失,增强环境保护都具有重要的现实意义。
To analyze the drift affecting factors and the droplet drift dynamics could not only provide the theoretical basis for the research of the droplet drift control and the spraying equipment, but also increase the efficiency of pesticide applications, reduce the droplet drift and improve the environmental protection.
通过分析中国农药使用现状及存在问题,提出在中国要有效控制雾滴飘移,除了采取合适的施药方法,还应进一步加强农药雾滴飘移控制技术及喷雾部件的研究。
long-range transport of atmospheric pollutants
大气污染物的长程飘移
| wandering block sequence
电弧飘移多层焊次序
THE NATURE OF DRIFT LOSS AND THE ANTI DRIFTING ABILITY OF DIFLIRENT NOLLZELS
雾滴飘移试验与几种喷头抗飘失能力的比较
Spray Pattern and Drift Potential of a Spinning Disk
转子喷头的雾滴轨迹及雾滴飘移性能
THE MEASUREMENT AND CLASSIFICATION ON DRIFT PROPERTY OF SPINNING DISK SPRAYERS
转子式喷头喷雾飘移性能试验和分级
Drift potential is one of the most important factors affecting spraying quality.
飘移性是衡量喷雾质量的重要标志之一。
Spray drift is one of the most important indexes evaluating spray quality.
飘移是评价液体农药喷洒质量的重要指标。
Molecular Breeding of Chinese Cabbage (Brassica Campestris L.) for Insect Resistance and the Bar Gene Introgression Via Pollination in Cruciferae Plants;
白菜抗虫基因工程及bar基因的遗传飘移研究
Numerical Study of the Incremental Unknowns Methods on Floated Grid;
飘移网格上增量未知元方法的数值研究
Exploration about the way of building the rolling and floating Clouds in 3DSMAX;
关于3DSMAX动画中建立翻滚飘移云朵方法的探讨
It was economized on Kebaiwei of low drift-milipowder with good social and economic benefit.
用于制克百威低飘移细粉后，取得了很好的社会经济效益。
Like the sun, the planets shift their positions so slowly that their day-to-day motion is hard to detect.
象太阳一样，行星的飘移非常缓慢，以致它们每天的运动很难被察觉。
EMEP monitoring station
欧洲空气污染物长程飘移监测和评价合作方案监测站
EMEP Steering Body
欧洲空气污染物长程飘移监测和评价合作方案指导机构
The torquing current is measured and related to drift rate by prior calibration data.
测出产生力矩的电流，然后根据事先校正的数据来算出飘移率。
(6) charging droplet can enhance its uniformity and reduce small droplet drift;
(6)雾滴荷电后可以显著提高均匀性,减少小雾滴的飘移;
Spray drift potential evaluation of typical nozzles under wind tunnel conditions
典型液力喷头在风洞环境中的飘移特性试验与评价
EARLY ORDOVICIAN BIOSTRATIGRAPHY WITH OEPHALOPODA IN SOUTHERN JILIN--A Discussin on Drift of the Related Terranes
吉林省南部早奥陶世头足类生物地层—兼论有关地体的飘移