Admittedly, at an average density of 100-1,000 molecules per cubic centimetre ( compared with 100 billion billion in air at sea level), it is a pretty thin gas. 诚然,分子平均密度10^2-10^3/cm^3的气体非常稀薄(海平面处是10^26/cm^3)。
The area contraction ratio has obvious influence on the flow pattern, discharge, wall pressure and air pressure inside level rotary flow. 研究发现面积收缩率对流态、泄流量、壁面压强和空腔内的气体压强均有较大的影响。
Urban air quality level is token by air quality index ( API), whose spatiotemporal change can reflect the change of urban air quality. 城市空气质量水平是以空气质量指数(API)来表征的,API的时空变化可以反映城市空气质量的变化过程。
The air quality level reached the highest in the history. 城市的空气质量已见持续稳定的改善,空气质量水平达到了历史的最高点。
Analyze the main index, which include API, primary pollutant, air quality level, in86 cities of china from Urban Ambient Air Quality Daily Report of2006. 收集了2006年《重点城市空气质量日报》中中国86个重点城市空气质量主要分析指标&空气污染指数(API)、首要污染物、空气质量级别,并对数据进行统计分析。
Hot Stove air temperature control level has been noticeably improved, the blast furnace smelting is very important and significant impact. 锅炉风温控制水平也有了明显的提高,对高炉冶炼具有非常重要的影响及重大意义。
( of speed) having or caused by speed approximately equal to that of sound in air at sea level. (指速度)具有大约与海平面的声音速度相等的速度,或者由这种速度产生的。
Decreasing excess air level can reduce N2O and NOx emissions, but the effects of excess air level on N2O emissions are correlated with coal type. 降低过量空气系数能同时减少N2O和NOx的排放量;且过量空气系数对N2O排放的影响与煤种有关。
According to the air quality level of WHO issuance, at least 80% city dwellers are living in the unacceptable air condition, which threatens their health. 按WHO指导值来衡量,城市居民至少有80%的人是在不可接受的空气质量下生活,对人体健康构成极大威胁。
A survey on air radon level in underground spaces in four provinces of Southeast China 我国东南四省人防工程内氡的调查空气中氡浓度的预测
Results ( 1) On plain films, classical stepladder like air fluid level was seen in 62 cases. 结果(1)68例立位腹部平片,其中62例典型阶梯状气液平面,6例肠管少量积气,未见液平面;
The results showed that the concentration of PM_ ( 10), SO_2, NO_2 was fall. Pollution days of air quality level showed obvious rules. 分析结果表明,PM10、SO2、NO2三项污染物的浓度都有所下降,空气质量级别的污染天数呈现明显的月变化规律。
A brown gas compound fuel burning system is firstly proposed. Has the advantage of safety operation, simple structure, low excess air coefficient emission level, it can be used at different kinds of garbage incinerator. 首次提出一种燃油和布朗气的复合燃烧系统,结构简单、安全,具有接近理想值的空气过剩系数和极低的排放水平,适合各种垃圾焚烧炉的助燃。
This paper analyses the cause of exceed radon eduction in a uranium mine, suggestes the radon control measures in order that its radiate strength in underground mine air reaches allowed level. 本文分析了某铀矿井氡超量析出的原因,提出了控制氡析出的措施,从而使矿井空气中总放射强度达到国家规定的容许水平。
The basic principle, usage of air blowing based level detection, and the structure and application of UCA ( H) type nuclear safety class air blowing device are described briefly. 简述吹气法检测液位的基本原理、用途以及UCA(H)系列核安全级吹气装置的结构和应用。
The Zone Dividing System of the Air Pollution Level Based on Mathematical Model 基于数学模式的大气污染等级区域划分系统
Air pressure of level rotary flow in internal energy dissipation tunnel 水平旋转内消能泄洪洞空腔环流内气体压强的变化规律
Air Blowing Based Level Detecting Device and Its Application 吹气法液位检测装置及其应用
On chest film, CT and MRI, the lesion appeared as a mass, containing air or air fluid level, behind the heart. 胸片与CT、MR影像表现均见疝囊在心脏之后呈肿块状,内含气体或气液面。
Study on In-car Air Pollution Level 车内空气挥发性有机物污染水平调查
Analyzing abnormal liquid air level in lower column and solutions 下塔液空液位异常的原因及处理
These methods were used to evaluate the air pollen pollution level of Guiyang city, the results of evaluation were relatively consistent with the latter two methods more applicable. 采用这3种方法对贵阳市空气花粉污染状况进行评价,其评价结果是相对一致的,其中后2种方法评价效果较好。
Effect of soil air resistance on level basin irrigation 土壤空气阻力对水平畦灌溉的影响
It is concluded that under general air pollution, linear regression function can be used to properly estimate SO2 concentrations in the air and to assess air pollution level. 在一般污染状况下,线性回归方程即可很好地用于测算大气SO2浓度,并评价污染等级;
Using exhausted gas temperature, excess air level, unburned carbon in fly ash and in slag as assistant mark of economization, the diagnosis model of boiler combustion economization is constructed and a case study is given. 以排烟温度、过量空气系数、飞灰含碳量和炉渣含碳量为经济性辅助指标,建立燃烧经济性诊断模型。
The paper closely discusses how to raise the air material safeguard level and how to reduce the air material safeguard cost. 本论文围绕提高航材保障水平和降低航材保障成本这个目标,对航材库存的科学管理进行了研究探讨。
Meanwhile, the plasma jet length is decreased exponentially as the air impurity level increases. 等离子体射流的长度随着空气含量的增加不断减小。