机插水稻育秧基施锌肥试验研究

为探索崇明县缺锌土壤的水稻最佳施用锌肥的方法和效果,笔者于2008年开展了水稻机插秧基施锌肥的效果试验。结果表明,锌肥基施是省工省本、行之有效的方法,在一定浓度范围内,随基施锌肥水平的提高,产量呈正比提高。崇明地区机插水稻育秧基施锌肥的适宜用量为每667m2秧苗(30盘)基施1.5%～2%ZnSO4·7H2O肥液3kg,可达到增产10%左右的效果。

Treatment of cholecystitis with Chinese herbal medicines:A systematic review of the literature

AIM:To analyze the literature on the use of Chinese herbal medicines for the treatment of cholecystitis.METHODS:The literature on treatment of cholecystitis with traditional Chinese medicines(TCM) was analyzed based on the principles and methods described by evidence-based medicine(EBM).Eight databases including MEDLINE,EMbase,Cochrane Central(CCTR),four Chinese databases(China Biological MedicineDatabase,Chinese National Knowledge Infrastructure Database,Database of Chinese Science and Technology Periodicals,Database of Chinese Ministry of Science and Technology) and Chinese Clinical Registry Center,were searched.Full text articles or abstracts concerning TCM treatment of cholecystitis were selected,categorized according to study design,the strength of evidence,the first author's hospital type,and analyzed statistically.RESULTS:A search of the literature published from 1977 through 2009 yielded 1468 articles in Chinese and 9 in other languages;and 93.92% of the articles focused on clinical studies.No article was of levelⅠevidence,and 9.26% were of level Ⅱ evidence.The literature cited by Science Citation Index(SCI),MEDLINE and core Chinese medical journals accounted for 0.41%,0.68% and 7.29%,respectively.Typically,the articles featured in case reports of illness,examined from the perspective of EBM,were weak in both quality and evidence level,which inconsistently conflicted with the fact that most of the papers were by authors from Level-3 hospitals,the highest possible level evaluated based on their comprehensive quality and academic authenticity in China.CONCLUSION:The published literature on TCM treatment of cholecystitis is of low quality and based on low evidence,and cognitive medicine may functions as a useful supplementary framework for the evaluation.

Vulnerability of Large City and Its Implication in Urban Planning: A Perspective of Intra-urban Structure

Vulnerability is a new field and analytical tool in the study of urban safety. Analysis and assessment of vulnerability provide a new basis for urban planning. This study constructed a quantitative index system for assessing vulnerability, based on the city′s sensitivity and emergency response capacity. City size, density, and spatial form influence a city′s sensitivity to crises and risks, to which vulnerability is positively related. Levels of socio-economic development, infrastructures, and emergency management contribute to a city′s emergency response capacity, with which vulnerability is inversely associated. Vulnerability of 19 large Chinese cities was assessed. Harbin and Shenzhen demonstrated the highest and lowest vulnerability among 19 cities, while Beijing, Shanghai and Guangzhou ranked the 5th, the 9th and the 12th. Spatially, northern cities tended to be more vulnerable than southern cities. And the differences in vulnerability among cities were explored based on cities′ physical geography conditions, level of socioeconomic development, infrastructures, regional status, history of disaster, history of urban planning and development, government policies, etc.

Updating of the hierarchical rock mass rating(HRMR) system and a new subsystem developed for weathered granite formations

The RMR system is still very much applied in rock mechanics engineering context. It is based on the evaluation of six weights to obtain a final rating. To obtain the final rating a considerable amount of information is needed concerning the rock mass which can be difficult to obtain in some projects or project stages at least with accuracy. In 2007 an alternative classification scheme based on the RMR, the Hierarchical Rock Mass Rating(HRMR) was presented. The main feature of this system was the adaptation to the level of knowledge existent about the rock mass to obtain the classification of the rock mass since it followed a decision tree approach. However, the HRMR was only valid for hard rock granites with low fracturing degrees. In this work, the database was enlarged with approximately 40% more cases considering other types of granite rock masses including weathered granites and based on this increased database the system was updated. Granite formations existent in the north of Portugal including Porto city are predominantly granites. Some years ago a light rail infrastructure was built in the city of Porto and surrounding municipalities which involved considerable challenges due to the high heterogeneity levels of the granite formations and the difficulties involved in their geomechanical characterization. In this work it is intended to provide also a contribution to improve the characterization of these formations with special emphasis to the weathered horizons. A specific subsystem applicable to the weathered formations was developed. The results of the validation of these systems are presented and show acceptable performances in identifying the correct class using less information than with the RMR system.

A Review of Assessment and Adaptation Strategy to Climate Change Impacts on the Coastal Areas in South China

This paper reviews assessment of climate change impacts on economy, society and ecological environment in the coastal areas of South China based on published literatures; it also proposes suitable adaptation strategies and counter- measures. Review shows that climate change has resulted in sea level rise in the coastal areas of South China, increasing the occurrence and intensity of storm surges, aggravating the influence of saltwater intrusion, coastal erosion, urban drainage and flood control, threatening the coastal facility and infrastructures, inundating lowland areas, offsetting mudflat silting, and degrading mangroves and corm reef ecosystem. Therefore, in order to reduce the adverse effects of climate change and to support the sustainable development in the coastal areas of South China, it is critical to improve the monitoring and early warning system, enhance prevention criteria, fortify coastal protection engineering, strengthen saltwater prevention, and reinforce the ecological restoration and protection.

Relationship between IoT and Economic Growth:From an Investment Perspective

As a representative of the development and application of information and communication technob ogy （ICr）, the Internet of Things （loT） has attracted world attention. However, the effect of loT on economic growth has not been fully explored. This paper analyzes this issue from the perspective of ICT investment. After analyzing the data of eight representative provinces from 1996 to 2008, we f＇md out that the effect of ICT investment on e- conomic growth is limited and the levels of telecom- munications infrastructure and education are key factors influencing the effect. Thus it＇s necessary to further improve the telecommunications infrastructure and enhance related education and training to promote the effect of loT on economic growth.