基于量纲理论的煤层瓦斯压力计算模型的优化

煤层瓦斯压力预测对煤与瓦斯突出和煤层安全开采意义重大。在陈连省等基于量纲分析建立的煤层瓦斯压力计算模型的基础上,通过重新进行量纲分析以及MATLAB数值模拟分析,利用已有的实测数据,针对其所建立的煤层瓦斯压力计算模型进行了重新建模和优化,新模型为整体的一个数学模型,避免了原分段数学模型带来的误差,使得煤层瓦斯压力的预测计算更为准确,可为煤层瓦斯压力的预测提供参考。     

Development of activated carbon from Nerium oleander flower and their rapid adsorption of direct and reactive dyes

The present study investigates the thermally activated carbon derived from Nerium oleander flower which was used an adsorbent. Physicochemical properties of Nerium oleander flower carbon (NOFC) were characterized by scanning electron microscopy, X-ray diffraction, and Fourier transform infrared for the removal of DTB (Direct Turquoise Blue) and RR-HE7B (Reactive red–HE7B) dyes from aqueous solution. Adsorption studies were carried out with different pH, adsorbent dose, contact time, and initial concentration dye solution. Optimum conditions for maximum removal of DTB and RR-HE7B was achieved to be pH 2 for both dyes, adsorbent dose of 100 mg and equilibrium time of 35 and 60 min, respectively, for NOFC. The maximum adsorption capacity of NOFC was found to be 33.33 and 19.60 mg g^?1, respectively, for the removal of dye solution. The mechanism of adsorption was studied by using different kinetic models and isotherms. The results clearly showed that the NOFC adsorption was fitted to pseudo–first-order for DTB and pseudo–second-order for RR-HE7B. Equilibrium data were well fitted with both isotherm models. According to the results, NOFC can effectively remove DTB and RR-HE7B from aqueous solutions.     

TCDD对乳腺癌细胞端粒酶活性的影响

探讨了2,3,7,8-四氯二苯并-ρ-二噁英(TCDD)在体外对雌激素依赖性乳腺癌细胞MCF-7端粒酶活性的影响.用0.5μmol·L-1的2,3,7,8-四氯二苯并-ρ二噁英(TCDD)作用于MCF-7细胞,裂解后提取MCF.7细胞端粒酶.采用BCA方法定量蛋白、重复序列扩增-银染法检测端粒酶活性.结果表明.TCDD作用MCF-7细胞后,细胞端粒酶活性增强,且随作用时间端粒酶活性减弱,但明显高于对照组(P<0.05).结果表明:TCDD有显著增强MCF-7细胞端粒酶活性的作用.     

Combination of adsorption and biodegradation processes for textile e uent treatment using a granular activated carbon-biofilm configured packed column system

The objective of this study was to investigate the feasibility of using a granular activated carbon-biofilm configured packed column system in the deeolodzation of azo dye Acid Orange 7-containing wastewater.The Acid Orange 7-degrading microbial from anaerobic sequencing batch reactor which treating the azo dye-containing wastewater for more than 200 d was immobilized on spent granular activated carbon(GAC)through attachment.The GAC-biofilm configured packed column system showed the ability to decolorize...     

基于MATLAB的湘江流域工业固体废物灰色预测

对灰色预测原理及其建模步骤作了系统介绍。借助MATLAB软件建立等维灰数递补残差修正动态模型预测湘江流域未来10年工业固体废物年产量,以期为湘江流域今后工业固体废物的管理、污染防治工作提供科学依据。结果表明:(1)用此模型进行预测,相对误差均在5%以下,预测精度较高,取得了较理想的预测效果;(2)湘江流域未来10年工业固体废物年产量预测值呈指数趋势增长,年增长率为8%～12%,到2016年湘江流域工业固体废物年产量预计将达到7645.01万t。     

2—氨基—5—萘酚—7—磺酸生产废液的资源回用工艺研究

本文应用有机胺的离子缔合萃取作用回收了２－氨基－５－萘酚－７－磺酸生产废液中的９８％以上的有用成分，结果可从号产品吕废液中获取５７２３元的净效益，实现了治理资源回收的双重目的。从萃取体系的特性及其影响因素入手，深入研究了萃取剂浓度，待萃物含量及萃取效率的关系，建立了萃取体系的等温方程：１／Ｘ／Ｍ＝７．１９＋３１２．９１／Ｃ，ｒ＝０．９９９７。     

SO4^2-／TiO2对SO2-C7H16-TiO2复相光化学反应的影响

研究了TiO2与SO2，C7H16复相光化学反应的光催化活性．在SO2-C7H16-TiO2光催化反应过程中，TiO2表面可形成SO4^2-/TiO2结构，它的存在可提高庚烷的光催化氧化速率，利用IR和XPS研究了反应过程中TiO2表面形成的SO4^2-/TiO2结构。     

牛蛙生长激素基因在COS7细胞中的转染表达

应用RT-PCR技术克隆牛蛙生长激素(BfGH)的cDNA,T-A克隆法构建反向插入的pMD18-T/BfGH重组质粒,回收BamHⅠ酶切的BfGH cDNA片段,并与去磷酸化处理的真核表达载体VR1020/BamHⅠ,酶切鉴定方法筛选BfGH正向插入的重组真核表达质粒VBfGH.脂质体法介导质粒VBfGH转染哺乳动物细胞COS7,对转染后的COS7细胞进行RT-PCR、ELISA和免疫荧光检测,分别在转录和翻译水平证实BfGH基因在COS7细胞中得到了正确的转染表达.图4表1参17     

Analyses of airborne Be concentrations in Hong Kong using back-trajectories

A total of 71 air samples were collected in Hong Kong area from November 2001 to February 2003 using a high-volume air sampler and a high-volume cascade impactor with five atmospheric pressure stages. The ⁷Be radioactivity on each stage was measured using a high-efficiency germanium gamma-ray spectrometer. From the radioactivity of stages, the total airborne ⁷Be radioactivity was determined. The activity median aerodynamic diameter (AMAD) of ⁷Be-associated atmospheric aerosols was found to be 0.22–1.11 μm and the geometric standard deviation (GSD) was found to be 1.2–10.5. With the assumed mean growth rate (MGR) of atmospheric aerosols of 0.004–0.005 μm h⁻¹ and the size of Aitken nuclei of 0.015 μm, the residence times of ⁷Be-associated atmospheric aerosols were also found from the AMAD.Three-dimensional 4-day back-trajectories were obtained using the HYSPLIT model from NOAA Air Resources Laboratory. These trajectories were used with the measured ⁷Be radioactivity to construct regional ⁷Be intensity fields for four different altitude levels (less than 1000, 1000–2000, 2000–3000 and above 3000 m) with a Geographic Information System (GIS). Low ⁷Be intensities were found to have advected from low altitudes (less than 1000 m) and oceanic areas. The ⁷Be intensities increased for the higher intensity field layers.By comparing the time taken for air masses to come from the ⁷Be source to Hong Kong and the residence time determined from the AMAD of ⁷Be-associated atmospheric aerosols, good agreement was found if the mean growth rate of 0.005 μm h⁻¹ for atmospheric aerosols was used, and the use of back-trajectories was shown to be satisfactory even up to about 6.5 d. By using the residence time with a MGR of 0.005 μm h⁻¹, the ⁷Be source was found to be relatively well confined in the areas of Mongolia and southeastern Siberia, which further supported that the association of ⁷Be source with the Siberian anticyclone.     

MATLAB加VB实现实验室内质量控制图的绘制

应用Visual Basic强有力的界面设计功能和MATLAB的强大的计算和图形处理功能，通过在VB中调用MATLAB的ActiveX方法，实现应用系统的无缝集成，通过程序创建和《环境水质监测质量保证手册》中的实例，向读者展示如何运用基于MATLAB与VB编程方法，实现质量控制中复杂的数据统计和图表的制作功能。