高速公路岩溶路基的注浆施工方法分析

岩溶地质现象一直是人们研究的对象,时其的发育过程及形态特征已经有深刻的认识,路基中的岩溶一直是路基长期稳定的重大隐患,文章对路基岩溶病害的常见类型和注浆加固治理方法进行了分析.     

浅谈公路覆盖型岩溶路基处治设计

根据覆盖型岩溶的发育特征,介绍了覆盖型岩溶路基的处治现状、原则及方法。对类似岩溶地区的路基设计施工有一点的参考意义。     

浅谈电气化铁路岩溶病害路基注浆施工技术

铁路既有线路基岩溶潜水侵蚀作用强烈,易形成土洞并扩展引起局部陷穴发育,严重时会导致线路轨枕悬空,危及行车安全,须对岩溶病害路基注浆处理。文章通过工程实例对电气化铁路岩溶病害地段路基注浆施工技术予以介绍。     

路基岩溶注浆施工方案

结合实际,针对路基岩溶注浆施工方案进行分析。     

铁路客运专线路基岩溶整治技术

长昆客专是我国西南地区云贵高原新建的第一条客运专线,同时也是国内外路基通过岩溶发育地区规模最大的高速铁路,结合长昆客专云南段马龙-嵩明区间路基岩溶整治施工,介绍了云贵高原喀斯特地貌发育情况下,铁路客运专线路基岩溶整治的设计和施工技术,并给出了施工方法和效果检查,可为今后类似工程的施工提供指导。     

公路工程路基路面治理措施浅析

公路工程路基路面的治理对于提高工程的质量至关重要。对公路工程路基路面的治理可从以下四个方面入手：即边坡防护与加固治理、边坡变形与失稳治理、岩溶地区路基治理和采空区路基治理等。     

路基岩溶段施工技术研究

结合三南铁路施工路基岩溶地段的施工经验,总结出了一套"探灌结合"的注浆法施工技术,阐述了单线铁路岩溶路基加固处理质量控制要点及要点注意事项,为后期运营安全提供了可靠保障。     

高密度电法和地质雷达在岩溶地区铁道路基探测中的应用

高密度电法和地质雷达探测,在岩溶地区的工程勘察和灾害地质调查过程中,应用范围非常广泛。在岩溶地区的铁道路基探测中,应用高密度电法和地质雷达探测相结合,能提高探测结果的可靠性和准确性。通过运用这两种方法的基本原理及野外施工方法,查明铁道路基及隧道底部的岩溶发育情况,验证出这两种方法在实际探测中的应用效果良好,为铁道的后期施工提供了安全保障。     

高密度电法在高速公路地基稳定性评价中的应用

在地下以隐伏基岩为灰岩的路基地段,常常伴随着岩溶、土洞的发育,这些不良地质现象对路基稳定性影响很大。本文阐述了高密度电法勘探的基本原理和方法,并通过对梅河高速公路第一标段的勘察成果分析,探讨了高密度电法在高速公路地基稳定性评价中的应用效果,并分析了高密度电法解释误差的客观原因。     

我国高速铁路软土地基施工技术探讨

高速铁路建设中软士路基处理一直是铁:路建设中的技术难题,也是建设者们不断探索的问题.以实际的工作经历,对高速铁路软土路基处理进行探讨.首先分析软土路基的特征,然后阐述软土路基的处理方法,最后分析高速铁路软士路基的施工教术.     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP.     

Prevalence of soft neurological signs in Chinese people

Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence     

Chinese Scientists Use Earth Observation Technologies to Study and Protect Wild Camels

<正>Chinese scientists plan to apply Earth Observation technologies to protect the critically endangered wild camels(Camelus ferus).With the help of remote sensing,satellite positioning,geographical information system and wireless sensors networks,they will be able to access the distribution and population of the wild camels and protect their habitats.The project will be carried out by the International Research Center for Wild Camel Conservation,which was jointly established earlier this year by the Institute of Remote Sensing and Digital Earth(RADI)of the Chinese     

More than Skin Deep – Understand Skin Biology by Means of Dermatogenomics

<正>The Paul Gerson Unna Research Group on Dermatogenomics was founded in October 2012 at the Partner Institute for Computational Biology.The ultimate goal of the group is to understand the biology of skin and skin appendages.