宁夏扬黄工程湿陷性黄土的工程处理实践与体会

湿陷性黄土地基浸水饱和后，由于易溶盐类的溶解，土结构的破坏，使其承栽力直线下降。宁夏扶贫扬黄工程大多位于湿陷性黄土地区，在地基处理过程中总结出了以下几点经验：①泵站地基可视湿陷土层的厚度不同．采用换填土垫层、砂石垫层，大直径扩底灌注桩或用预浸水法处理；②桥、涵、闸等建筑物应以换基、垫层和防护措施为主；③渠道地基应首先防止内水外渗，同时采取措施及时排除外水。     

重新审视我国粗放型劳动密集产业

我国是劳动力资源大国,在国际经济贸易关系中,发展劳动密集型产业符合我国的比较优势。劳动力成本的比较优势应当是劳动力资源的成本和劳动力资源的效率的综合体现。而我国劳动密集型产业所表现出来的情况是,伴随着时间的推移,劳动力资源的成本呈上升趋势,劳动力资源的效率则呈下降趋势。因此,必须从战略的高度,重新审视我国粗放型劳动密集产业的比较优势与竞争优势的问题。     

A decision support system for vehicle relocation operations in carsharing systems

This paper presents a novel three-phase optimization-trend-simulation (OTS) decision support system for carsharing operators to determine a set of near-optimal manpower and operating parameters for the vehicle relocation problem. Tested on a set of commercially operational data from a carsharing company in Singapore, the simulation results suggest that the manpower and parameters recommended by the OTS system lead to a reduction in staff cost of 50%, a reduction in zero-vehicle-time ranging between 4.6% and 13.0%, a maintenance of the already low full-port-time and a reduction in number of relocations ranging between 37.1% and 41.1%.     

Has Crisis Communication Been Studied Using an Interdisciplinary Approach? A 20-Year Content Analysis of Communication Journals

This study examines whether the status of crisis communication research is interdisciplinary by paying special attention to different perspectives from varying theories, methods, and authors. One hundred seventy-five articles published in major communication journals from 1991 to 2011 were extracted as crisis communication articles. The results of a quantitative content analysis revealed that, among theories applied to crisis research, most were from communication and public relations disciplines, which included framing, image restoration, situational crisis communication, and excellence theory. Although outside disciplines that have studied crisis communication research included psychology, economics, mathematics, and sociology, those disciplines made up less than one-third of the articles. Regarding the methodological approach, each portion of articles using two or more methods (e.g., experiment and survey) and a triangulation approach (e.g., qualitative and quantitative) was less than 10%. However, the frequency of the triangulation, or mixed-method, approach has dramatically increased since 2006, which indicates that interdisciplinary crisis communication research is evolving into an interdisciplinary field. Another indication of this trend can be found in the variety of authors, institutions, and departments dedicated to crisis communication. Although crisis articles are published primarily by communication, journalism, and public relations departments, other diverse disciplines are also widely contributing to crisis communication research.     

Perceived justice in service recovery and behavioral intentions: The role of relationship quality

This study examined restaurant customers’ perceptions of justice according to service recovery effort levels and whether perceived justice influences customers’ future behavioral intentions. This study also investigated whether the effects of perceived justice on future behavioral intentions vary across customers’ relationship quality levels. The results showed that high recovery efforts were consistently evaluated highly in terms of perceived justice when compared to low recovery efforts, regardless of the level of relationship quality. Additionally, perceived justice brought about by service recovery efforts has a positive effect on customers’ future behavioral intentions. Hierarchical regression analyses suggested that relationship quality plays a moderating role between perceived justice and behavioral intentions in the distributive and procedural justice dimensions. Implications for the restaurant industry are also discussed.     

Performance of an ultra-compact biofilm reactor treating domestic and synthetic wastewaters

The performance of an ultra-compact biofilm reactor (UCBR) treating domestic wastewater (DWW) collected from a local water reclamation plant; and gradually shifting to a mono-type carbon source synthetic wastewater (SWW) combined with DDW (CWW) and finally SWW; was investigated in this study. The total COD concentrations of influent DWW and CWW/SWW were 413.6 ± 80.8 mg/L and 454.9 ± 51.3 mg/L, respectively. The UCBR was able to achieve average total COD removal efficiencies of 70 ± 10% and 80 ± 4% for DWW and SWW respectively. The total COD concentrations of the effluent of DWW and CWW/SWW were 122.5 ± 44.4 mg/L and 89.7 ± 10.3 mg/L, respectively. These observations suggested that heterotrophs in the UCBR system were able to better assimilate and remove carbon of mono-type SWW compared to diverse carbon sources such as DWW; although the influent soluble COD concentrations of the SWW were higher than those of the DWW. However, the effluent NH(4)(+)-N concentrations for both types of wastewater were rather similar, <3.0 mg/L; although the influent NH(4)(+)-N concentrations of the DWW were 1.5 times those of the SWW.     

淀山湖富营养化防治与生态修复技术研究

淀山湖是上海市最大的天然淡水湖泊,也是黄浦江上游的重要水源保护地．其水质、水量状况对上海市饮用水水源安全具有重要作用。近年,淀山湖水体质量不断下降,尤其是2007年,淀山湖各区域出现了不同程度的蓝藻暴发。基于此背景,在对淀山湖进行前期调查的基础上,提出建设试验工程．通过试验工程的实施形成一套可供修复淀山湖富营养化防治的技术体系,为大规模实施相关工程提供科学依据和技术支持。     

裂隙岩体宏观力学参数数值仿真模拟研究

岩体的参数确定一直是岩土工程中的一个重要及困难的问题，将整个工程岩体划分为不同尺寸等级的计算试件，依据室内外基本材料试验成果，采用数值仿真方法依次计算各级别计算试件，最后得到岩体的宏观力学参数．计算结果与实际情况值基本吻合，该计算方法解决了物理试验对岩体参数评价的局限性以及在整体模型计算中参数选取的任意性。     

The Role of Infrastructure in Mexican Economic Reform

This article estimates the relationship between the provisionof public infrastructure and private output in sixteen sectorsin Mexico. The sector-specific cost functions depend on wages,the cost of capital, and the nominal values of the stocks ofthree types of infrastructure: electricity, transport, and communications.The article concludes that infrastructure in electricity andcommunications generally reduces the cost of sectoral production,but transportation infrastructure tends to increase costs ofsectoral production. It appears that Mexican public expenditureon electricity and communications has enhanced the productivityof private production, but expenditure on transport may actuallyhave had a detrimental effect on private output. In addition,although in general labor and infrastructure are substitutes,in the case of electricity and communications infrastructure,capital and infrastructure are complements. In the case of transportinfrastructure these conclusions are reversed.