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排序方式: 共有114条查询结果,搜索用时 9 毫秒
111.
针对民营企业特点,基于交互安全文化模型,建立民营企业安全文化模型并辨识
关键元素,以赛轮金宇股份有限公司为例进行实证分析。在广泛参考国内外相关研究的
基础上,设计调查问卷,运用粗糙集ROSETTA软件对测量结果进行属性简约,最终确定
15个安全文化元素;借助MATLAB,采用熵权法确定各元素权重,然后进行可拓综合评价
。评价结果表明该企业的“高层管理者重视”一项得分为4.82,水平较高,整体文化等
级属于“良”,级别特征变量j*=3.138 1。“创造安全舒适的工作环境”、“建立合理
的奖惩制度”、“定期进行应急演练”3个方面得分偏低,是安全文化建设需要重点加
强的方面。 相似文献
112.
In situ methane (CH(4)) measurement techniques and data from the Zeppelin Station in Ny-Alesund on Svalbard (N 78 degrees 54' E 11 degrees 53') on Mt. Zeppelin (475 m.a.s.l) are presented. The data span the time period from October 1998 to December 2003, though not continuously. The daily mean was calculated from 96 samples per day which are analysed by gas chromatography with flame ionisation detection. Details of the experimental methods and procedures are given. A harmonic function is fitted to the data with a constant trend and seasonal amplitude. The data are also presented in a regression plot showing the difference between the in situ measurements and flask measurements from the National Oceanic and Atmospheric Administration of the Climate Monitoring and Diagnostics Laboratory (NOAA/CMDL) in Boulder, Colorado (http://www.cmdl.noaa.gov/). The Zeppelin data show typical Arctic air characteristics with wintertime pollution episodes from Europe and Russia and a relatively calm summer state. 相似文献
113.
Complexation of the antibiotic tetracycline with humic acid 总被引:10,自引:0,他引:10
The effect of solution chemistry and sorbate-to-sorbent ratio on the interaction of the antibiotic tetracycline with Elliott soil humic acid (ESHA) was investigated using equilibrium dialysis and FITEQL modeling. Tetracycline speciation strongly influenced its sorption to ESHA. Sorption was strongly pH-dependent with a maximum around pH 4.3, and competition with H+ and electrolyte cation (Na+) was evident. The pH-dependent trend was consistent with complexation between the cationic/zwitterionic tetracycline species and deprotonated sites in ESHA (mainly carboxylic functional groups). Modification of ESHA by Ca2+ addition increased tetracycline sorption suggesting that ternary complex formation (ESHA-metal-tetracycline) may be important at higher concentrations of multivalent metal cations. The macroscopic data (pH-envelope and sorption isotherms) were successfully modeled using a discrete logK function with the FITEQL 4.0 chemical equilibrium program indicating that ESHA-tetracycline interaction could be reasonably represented as complex formation of a monoacid with discrete sites in humic acid. Sorption-desorption hysteresis was observed; both sorption and desorption isotherms were well described by the Freundlich equation. 相似文献
114.
Line Dahl Jeppesen Dorte Launholt Lildballe Lotte Hatt Jakob Hedegaard Ripudaman Singh Christian Liebst Frisk Toft Palle Schelde Anders Sune Pedersen Michael Knudsen Ida Vogel 《黑龙江环境通报》2023,43(1):3-13