加拿大浸入式教学对我国高职英语教学改革的启示

我国高职院校存在着学生英语水平较差、师资力量薄弱、课堂教学模式与教学大纲偏差的现状。通过探讨“浸入式”教学法的概念、分类及原则,并结合我国高职院校英语教学的现状,探讨“浸入式”英语教学法在我国高职院校实施的途径：从观念上重新认识浸入式教学模式,努力营造浸入式英语学习和教学的环境,引进既精通专业知识,又能熟练运用英语进行课堂授课的师资力量,组织编写适合高职院校浸入式英语教学的教材。     

土壤对铜和镉的静态吸附研究

通过静态吸附实验研究了德兴矿区大坞河下游下沽口土壤对铜和镉的吸附特点并采用Freundlich等温吸附方程进行拟合,探讨了pH值变化对铜和镉在土壤样品中分配系数的影响。结果表明：土壤铜和镉的吸附特性均符合Freundlich等温吸附方程,得到的金属铜和镉的Kf值分别为354．08、34．132;随着pH值的升高,铜和镉在土壤中的分配系数逐步增大,随后降低,pH值与分配系数关系曲线为单峰曲线。     

数值仿真技术在在建高层建筑物火灾中的应用

在建高楼火灾灭火困难。在建高楼灭火以及人员疏散的关键在于对灾变条件下在建高楼火灾参数变化的正确预测,特别是火焰、烟气蔓延范围、烟气浓度变化以及有毒气体的扩散范围等参数的预测。为了获得在建高层建筑物的火灾参数,论文利用美国国家标准和技术研究院（NIST）开发FDS（Fire Dynamics Simulator）软件,建立在建高楼模型,对高楼火灾进行全尺寸模拟,通过对模拟实验数据处理和分析,给出了在建高楼发生火灾时烟气浓度和氧气浓度纵向温度的变化规律以及不同方向风速对火灾的影响,提出一种阻火方案,并验证了它的阻火效果,为防灾减灾和消防决策提供有力的依据。     

Research on Tourism Competitiveness of Chinese Island Counties: Based on Factor and Cluster Analysis

Abstract

From the perspective of tourism competitiveness, the paper takes 12 island counties of China as the research object, and applies the method of factor analysis to study their competitiveness. The result shows that Putuo and Dinghai are more competitive while Pingtan and Nan’ao are less competitive. Finally, the 12 island counties are divided into four styles: first-class competitive county (Putuo), seond-class competitive counties (Dinghai,Yuhuan), third-class competitive counties (Chongming, Daishan, Changdao, Changhai and Shengsi), fourth-class competitive counties (Dongshan, Dongtou, Pingtan and Nan’ao) by cluster analysis. The classification of island counties is to clear their relative position, then to promote their development.     

Operators’ signal-detection performance in video display unit monitoring tasks of the main control room

This study evaluated the operators’ signal-detection performance in video display unit (VDU) monitoring tasks of the main control room (MCR). So far the study of the relationship between VDU design strategy and human errors has been superficial. To validate the effect of VDUs design strategies on operating errors in the MCR, this present research adopted a within subject experimental design to develop different experimental treatments based on two types of display modes included consistent mode and mixed mode. A total of 13 undergraduate and graduate students were recruited as participants in the experiment. Dependent variables included situation awareness, reaction time, error frequency, and subjective performance. Some research support was found for the representation principles. The conclusions of this study could not only be implemented by the human-system interface (HSI) designers of a MCR in the advanced nuclear power plant (NPP) but also could be generalized to the extent that other digital workstation similar to the MCR.     

Nonisothermal pyrolysis kinetics of waste printed circuit boards and product characterization using TG–MS

Journal of Material Cycles and Waste Management - With characteristics of high resources, complex composition, and high toxicity, the treatment and disposal of waste printed circuit boards (WPCBs)...     

Risk to humans of consuming metals in anchovy (<Emphasis Type="Italic">Coilia</Emphasis> sp.) from the Yangtze River Delta

Concentrations of metals were determined in four species of anchovy (Coilia sp.) from the Yangtze River, Taihu Lake, and Hongze Lake in Jiangsu Province, China. Concentrations of Cr in anchovy fish muscle ranged from 2.6 × 10⁻² to 5.0 mg/kg ww, and Coilia nasus taihuensis in Jiaoshan, Taihu Lake contained the highest concentrations of Cr, which was almost 111-fold higher than the mean value at other locations. Concentrations of Pb ranged from 1.5 × 10⁻² to 1.3 × 10⁻¹ mg/kg ww. Comparisons of concentrations of lead (Pb) among the four species indicated that anadromous species contained higher concentrations of Pb than did freshwater species. However, concentrations of Pb in C. nasus from the Nanjing and Haimen locations in the Yangtze River were not significant higher than those of two freshwater species: C. nasus taihuensis from Taihu Lake and C. brachygnathus from Hongze Lake (Duncan’s test, α = 0.05). While concentrations of Cd and Zn ranged from 7.0 × 10⁻⁴ to 3.6 × 10⁻³ mg/kg ww and 3.4 to 4.8 mg/kg ww, respectively, there were no significant differences in concentrations among the eight locations. The only concentration of the metals studied that exceeded the Chinese National Standard was Cr in Coilia from Jiaoshan, Taihu Lake, which was 2.5-fold higher than the standard. These results indicate that people who consume the genus Coilia are not at risk due to concentrations of metals, except Cr in C. nasus taihuensis from Jiaoshan in Taihu Lake. Concentrations of all of the metals studied except for Cr were similar to or less than those of metals in most other areas in the world.     

聚丙烯酰胺对紫色土中磷素吸附特征的影响

通过等温吸附实验分别研究了特定磷质量浓度下系列PAM用量和系列磷质量浓度下特定PAM用量对磷素在土壤中吸附特征的影响.试验表明,土壤经过PAM处理后其对磷素的吸附性能发生了明显改变.施用PAM使紫色土磷的吸附量降低,PAM用量较低时,吸附量随PAM用量的增加而减少,并且在0.1%～0.5%PAM内两者之间达到极显著负相关.紫色土磷最大吸附量为277.8 靏穏-1 ,0.1%、0.2%、0.4%PAM处理后紫色土对磷的最大吸附量均降低,分别为263.28 靏穏-1、227.38 靏穏-1、212.88 靏穏-1,但吸附强度却没减弱,甚至得到加强.PAM通过改变土壤集结状态和表面性质对土壤磷慢速吸附阶段产生了显著影响,但对快吸附阶段无明显影响.     

松花江流域面源污染特征与防治对策

在概述松花江流域水环境状况的基础上,分析了其面源污染的特征,农药流失、超量和不合理施用化肥、规模化养殖、生产、生活污水排放是流域面源污染的主要来源。结合面源污染特征等因素,有针对性地确定治理技术,如加强对面源污染防治工作重要性的认识、作好面源污染监测和防治技术示范推广工作、发展循环型农业等,提出了保护与治理可行的污染防治对策。     

蒽生物降解及其动力学分析

从长期被石油污染的土壤中分离了一株优势菌,经鉴定为铜绿假单胞菌,研究了该菌株对蒽的降解性能,结果发现该菌株对蒽有良好的降解效果。经过147h的降解,蒽的浓度从100mg/L降至27.5mg/L,降解了72.5mg/L,降解率达72.5%,显示了极强的降蒽能力。同时,进行了动力学分析,结果表明蒽的残留浓度Y(mg/L)与时间t(h)符合方程Y=90.4322e(-0.0098)x。