The effectiveness of an injection-based remediation strategy is primarily governed by accurate understanding of reagent delivery and ensuring uniform distribution within the reactive zone. In IRZ （in situ reactive z...The effectiveness of an injection-based remediation strategy is primarily governed by accurate understanding of reagent delivery and ensuring uniform distribution within the reactive zone. In IRZ （in situ reactive zone） design, the required reagent strength, injection volumes, injection rates, injection frequency, injection and monitoring well spacing, and the cost and time to achieve remediation goals are governed by the hydrogeology of the site. A properly designed tracer test is capable of providing critical above mentioned site-specific information, to assist with full scale design of an IRZ. This paper describes that implementing tracer testing to support remedial design can result in enhanced design efficiency, added assurance in full-scale implementation and ultimately resulted in substantial cost savings. Therefore, it is recommended that the broader practitioner community adopt this technique as a best practice for effective and optimum in situ remediation system design.展开更多
This paper aims to make a contrastive study on complaining strategies between American and Chinese university students, based on the descriptive study of the collected data, with reference to the social variables of s...This paper aims to make a contrastive study on complaining strategies between American and Chinese university students, based on the descriptive study of the collected data, with reference to the social variables of social status and social distance. It is found that Chinese and American university students are significantly different in the choice of complaining strategies produced to professors, intimates, friends and strangers. The Chinese show greater respect to professors than Americans do. Generally, as to interlocutors with equal social status, Americans＇ complaining degree displays a gradually descending tendency along a social distance continuum, while the Chinese have intimates and strangers at the both ends, with friends in the middle. No significant difference has been revealed in the choice of complaining strategies to parents, but Americans tend to be more polite than the Chinese. This challenges Brown and Levinson＇s formula, Wx = D （S, H） ＋ P （H, S） ＋Rx, which implies the same weight for each of these three factors. The study proves that in private conversations, the variable of social distance carries more importance than the variable of social status.展开更多
文摘The effectiveness of an injection-based remediation strategy is primarily governed by accurate understanding of reagent delivery and ensuring uniform distribution within the reactive zone. In IRZ （in situ reactive zone） design, the required reagent strength, injection volumes, injection rates, injection frequency, injection and monitoring well spacing, and the cost and time to achieve remediation goals are governed by the hydrogeology of the site. A properly designed tracer test is capable of providing critical above mentioned site-specific information, to assist with full scale design of an IRZ. This paper describes that implementing tracer testing to support remedial design can result in enhanced design efficiency, added assurance in full-scale implementation and ultimately resulted in substantial cost savings. Therefore, it is recommended that the broader practitioner community adopt this technique as a best practice for effective and optimum in situ remediation system design.
基金supported by the Teaching Reform Grant from Nanjing University of Posts and Telecommunications.Grant No.:JG00910JX32sponsored by Qing Lan Project of Education Department of Jiangsu Province
文摘This paper aims to make a contrastive study on complaining strategies between American and Chinese university students, based on the descriptive study of the collected data, with reference to the social variables of social status and social distance. It is found that Chinese and American university students are significantly different in the choice of complaining strategies produced to professors, intimates, friends and strangers. The Chinese show greater respect to professors than Americans do. Generally, as to interlocutors with equal social status, Americans＇ complaining degree displays a gradually descending tendency along a social distance continuum, while the Chinese have intimates and strangers at the both ends, with friends in the middle. No significant difference has been revealed in the choice of complaining strategies to parents, but Americans tend to be more polite than the Chinese. This challenges Brown and Levinson＇s formula, Wx = D （S, H） ＋ P （H, S） ＋Rx, which implies the same weight for each of these three factors. The study proves that in private conversations, the variable of social distance carries more importance than the variable of social status.
