基于可拓工程法的海底隧道施工突水后果严重性分析

施工突水是海底隧道建设过程中最大的安全风险,而对其后果严重性分析是风险评价的一个重要组成部分.由于海底隧道的突水后果严重性很难用定量的方式加以描述,无法采用经典的直接测算法和社会经济测算法,实现对海底隧道突水事故发生后灾难程度的定量评价.基于可拓工程法,依托厦门翔安海底隧道,将海底隧道突水风险后果分为生命损失、社会损失、环境影响损失和经济损失包括直接经济损失和间接经济损失,对海底隧道穿越海域风化深槽施工突水后果严重性进行半定量化的科学评价.     

钻爆法施工的海底隧道结构防排水技术研究

阐述了海底隧道的防排水原则,以厦门海底隧道为例讨论了钻爆法施工的海底隧道的合理排放量,提出了针对不同地层的防排水方案以及在海底隧道防排水设计施工中应注意的主要问题及需要研究的问题,提出的海底隧道防排水设计方法可为类似工程提供参考。     

层次分析法的海底隧道盾构施工风险评价

针对台山核电站海底隧道泥水平衡盾构施工中要穿越不良地质体及地层结构界面的风险因素,利用模糊层次分析法对其进行辨识、分析、评价.结果表明在海底隧道盾构施工中,废弃物、孤石充填物力学指标不详、渗漏、换刀影响工期等危险有害因素对其影响较大,针对风险问题提出了有针对性的安全控制措施,保证了海底隧道安全顺利施工.     

厦门翔安海底隧道修建技术初论

对厦门翔安海底隧道从桥梁隧道方案比选到跨海隧道方案的确定进行研究。介绍了在此作海底隧道方案的优越性,以及该海底隧道的特点、难点和施工技术方案,并对隧道设计、施工中所存在的不足之处进行论述。     

基于数据挖掘的工程项目动态风险评估研究

隧道工程的飞速发展使得隧道安全隐患越来越多.作为隧道建设的重要环节,隧道工程施工安全风险管理评估急需要更加先进的方法.基于此,以隧道施工工程为研究对象,以风险管理评估为研究目标,简析了风险因素产生及风险演化机理,构建了基于数据挖掘的隧道施工工程数据处理,主要采用动态神经网络与时间序列对结构化数据进行预测,采用文本挖掘对半结构化数据、非结构化数据进行,得到了可以分析的主题数据.构建了隧道施工工程的风险评价指标体系,采用变权理论对权重进行了动态控制.试验结果表明本方案能够实现工程项目的动态反馈机制,有效提高隧道施工工程的风险评估准确度.     

大断面海底隧道软弱地层施工方法研究

我国第一条大断面海底隧道——厦门翔安海底隧道在浅滩及陆地段穿越富水软弱地层,围岩自稳能力差,极易发生涌水突泥,严重威胁施工的安全性。通过对隧道开挖方案的对比分析和根据施工现场监控量测的结果,对隧道穿越富水软弱地层的开挖施工方案、降排水关键技术和超前预加固方案进行了研究,为隧道施工提供技术支持。     

海底隧道工程环境风险评价与防范措施

海底隧道不同于陆地隧道,海底地质情况复杂,且工程施工是在巨大水系之下进行,遇到的环境风险几率及风险危害程度均比陆地隧道高。本文对海底隧道施工和运营中具有共性的风险因素进行了辨识,并重点分析了几种典型风险因素的控制措施,以供国内当前在建和待建的海底隧道设计方、施工方和运营方参考。     

浅谈隧道下穿高层建筑段的施工

介绍了胶州湾海底隧道青岛端接线工程云南路隧道ZK1+180～ZK1+580段下穿高层建筑段的施工技术及处理方案,分析了过高层段对施工的影响因素,提出了施工方案。指出,该工程为以后类似隧道下穿建筑物施工积累了经验。     

风险系数法在海底隧道平面线位确定中的应用

海底隧道平面线位的选取是整个海底隧道工程规划和设计阶段的关键环节,为了综合考虑海底隧道平面线位对隧道建设经济、安全、技术适用性及环境的影响,从风险系数角度入手,找出各方面的致险因素,结合层次分析法,建立一套完整的海底隧道平面线位评估体系.将这套评估方法应用于厦门海底隧道,对拟取的4条平面线位进行综合评估,确定出最优线位,为海底隧道工程的规划选线提供一定的参考.     

山西省柏叶口水库工程施工导流方案比选

结合柏叶口水库工程概况和施工导流条件,对全断面施工导流方案和分期导流方案进行了比选,推荐采用分期导流方案。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with