The dangerous of canyoneering would rock fall, faulty anchor system, flashflooding, as well as cold water, cold air, change of hypothermia, and little or no chance on rescue. 攀峡的危险有坠石、索具出现问题、泛洪、以及冰冻的水和空气、攀峡者体温过低、获救的机会几乎为零。
When coal gas maintains the zero pressure at the zero pressure valve under the condition, coal gas soakage along with air volume change according to proportion change, thus achieves full burning. 当煤气在零压阀保持零压的条件下,煤气吸入量将随着空气量的改变按比例变化,从而达到充分燃烧。
A reason for this is that RH buffering by materials is feeble and short lived compared with temperature buffering when the air change rate is large. 原因是当空气交换量大时,和热缓冲材料相比湿度缓冲材料的功能较弱,而且寿命不长。
Analysis of Surface Air Temperature Change in Macau During 1901-2007 1901&2007年澳门地面气温变化的分析
British boy Liam Derby Xia contracts the rare lung air change insufficient illness. 英国男童利亚姆?德比夏尔患有罕见的肺换气不足病症。
Experts recommend that your ventilation system should provide at least one air change every hour. 专家推荐你的通风系统应该至少要每小时换一下气。
Effects of air temperature change on spring wheat growth at different altitudes in northwest arid area 西北干旱区不同海拔高度地区气温变化对春小麦生长的影响
Relationships between phenology of 18 tree species and air temperature change in the Minqin desert area of China 甘肃民勤荒漠区18种乔木物候与气温变化的关系
Outer door temperature, solar radiation and area ratio of window to wall have impact on the indoor air temperature change. 分析了室外气温,太阳辐射,窗墙面积比对房间温度下降与上升的影响。
Spring phenophase changes of dominant plants in Zhengzhou and their responses to air temperature change 郑州主要植物春季物候变化及其对气温变化的响应
The new technique takes into account the effects of air density change and rotational speeds, thereby improving the analogy theory and making it applicable to compressible flow. 新方法考虑到工质密度和转速变化对压气机特性的影响,改进了相似理论并使其可应用于可压缩流体计算中。
Introducing equivalent person-density, explores the ultimate equivalent person-density at the largest air change rate the criterion regulated. 引入当量人员密度,提出了规范中换气次数上限适用的当量人员密度限值。
Emphasises importance of high ventilation effectiveness for ensuring desired indoor air quality, evaluates the air change efficiency and ventilation efficiency of different air distribution systems, discusses the relationship between ventilation efficiency and indoor contaminant concentration, and suggests some approaches to increase the ventilation efficiency. 指出了通风有效性对改善室内空气品质的重要性,比较了不同送风方式的换气与通风效率,分析了通风效率与室内污染度的关系,最后提出了关于如何提高通风效率的建议。
Starting from sustainable development of city, this paper analyzes structuring framework of modern ecological city. According to demand of ecological city construction, this paper makes a discussion on vegetation, air change, selection of tree species, etc. 以城市可持续发展为出发点,分析了现代生态城市的构建框架,按生态城市的建设要求,从城市的植被、空气变化、树种选择等方面进行了探讨。
Air change flow is one of the sanitarian standards which can evaluate indoor environmental quality, and it is also one of the important parameters that may calculate gas discharge amount per unit time. 新风量是评价室内微环境空气卫生质量的主要卫生指标之一,也是计算室内某种气体单位时间排放量的重要参数。
When human breathing impact must be considered with people inside microenvironment, all the derivation formulae could be used to calculate air change flow. 微环境内有人时必须考虑人释放的影响,这样箱子模式的各种推导公式都可以计算新风量值,且结果准确,准确度高。
Preliminary results indicate that air change flow, which is calculated by analytic solution and difference method, has no significant statistical difference without people inside microenvironment. 结果表明,没有人存在下,用箱子模式的解析解法和差分法计算的新风量值没有明显的统计差异;
Study on Method for Determination of Air Change Flow in Air-conditioned Carriage 空调旅客列车新风量测定方法的研究
Especially discusses the ways of choosing a proper air change rate. 讨论了换气次数的正确选取方法。
Predicting the volume of natural air change in underground buildings by the Monte Carlo technique 地下建筑自然通风量的蒙特卡罗模拟
Application of air change ventilation system in hydropower house 置换通风系统在水电站厂房中的应用
When increasing the air change rate in the underground space, the radon concentration in the air will fall fast. 在较高的氡浓度状态下,室内氡浓度对通风十分敏感,增大地下空间的通风换气率,会使空气氡浓度大幅度的降低。
Analyzes the effects of indoor dust loading and of fresh air rate to the air change rate in turbulent flow clean rooms. 分析了乱流洁净室净化空调设计中室内发尘量和新风比对换气次数的影响。
The paper calculates the concentration of HCHO respectively in two kinds of airflows, analyzes the distributions of the concentration field, non-dimensions concentration field, and air change efficiency, and compares the results of calculation with others using CFD method. 利用CFD软件模拟计算了两种气流组织方式下室内甲醛的浓度场,分析了室内浓度场、无因次浓度、空气交换效率的分布规律,并与传统计算方法的结果进行了比较。
However, the air change in the amount of information in the underwater acoustic communication, time-varying, frequency change and other characteristics caused by inter-symbol interference, seriously affecting the quality of communication. 但是,水声通信中信息量的空变、时变、频变等特性引起的码间干扰,严重影响了通信质量。
Finally, the determination method of minimum thermal resistance to prevent mould growth is proposed according to internal moisture production rate, air change rate, indoor and outdoor temperature. 最后根据室内产湿率、换气效率及室内外温度条件得出了基于预防霉菌生长的墙体的最小热阻的确定方法。
Air change rate was calculated by using CO2 two-parameter build-up method and one-parameter decay technique. 房间的换气次数根据两参数CO2浓度上升法和单参数浓度下降法进行计算。