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Surface texture and friction characteristics of diamond-ground concrete and asphalt pavements

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Journal of Traffic and Transportation Engineering(English Edition) 2016年第5期3卷 475-482页

作者： Shuo Li Dwayne Harris Tim wells Division of Research and Development Indiana Department of Transportation

Recently, diamond grinding has gained increasing attention as pavement preservation treatment to restore desired surface characteristics, particularly friction. Compared to other pavement preservation treatments such as surface overlays and high friction surface treat- ments, diamond grinding may cost less, save construction time, or require minimum maintenance. Diamond grinding produces longitudinal, continuous, and line-type texture that contains corrugations with evenly spaced ridges. The improved surface texture will immediately enhance pavement surface friction and reduce the possibility of hydroplaning in rainy weather. However, little information has been documented on the texture charac- teristics and long-term friction performance of diamond-ground pavements. A field evalu- ation was conducted to examine the surface texture and friction characteristics in diamond- ground concrete and asphalt pavements by the authors. Five pavement test sections, including two diamond-ground concrete pavements, one diamond-ground concrete bridge deck, one diamond-ground asphalt pavement, and one transversely tined concrete pave- ment, were selected for evaluation. Laser scanner testing was performed to capture both macro and microtexture profiles. Locked wheel testing was performed to measure the fric- tion numbers. The test results were examined and compared so as to evaluate two performances, after construction and long-term friction performance of diamond-ground pavements. It was found that longitudinal diamond grinding can provide durable, satisfactory surface friction performance for both concrete and asphalt pavements.

关键词： Concrete pavement Asphalt pavement Surface friction Diamond-grinding Macrotexture Microtexture

多器官床旁即时超声在新型冠状病毒肺炎中的应用:国际专家共识

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中国呼吸与危重监护杂志 2021年第2期20卷 77-84页

作者：王臻(译) Arif Hussain Gabriele Via Lawrence Melniker Alberto Goffi Guido Tavazzi Luca Neri Tomas Villen Richard Hoppmann Francesco Mojoli Vicki Noble Laurent Zieleskiewicz Pablo Blanco Irene W.Y.Ma Mahathar Abd.Wahab Abdulmohsen Alsaawi Majid AI Salamah Martin Balik Diego Barca Karim Bendjelid Belaid Bouhemad Pablo Bravo-Figueroa Raoul Breitkreutz Juan Calderon Jim Connolly Roberto Copetti Francesco Corradi Anthony J.Dean AndréDenault Deepak Govil Carmela Graci Young-Rock Ha Laura Hurtado Toru Kameda Michael Lanspa Christian B Laursen Francis Lee Rachel Liu Massimiliano Meineri Miguel Montorfano Peiman Nazerian Bret P.Nelson Aleksandar N.Neskovic Ramon Nogue Adi Osman JoséPazeli Elmo Pereira-Junior Tomislav Petrovic Emanuele Pivetta Jan Poelaert Susanna Price Gregor Prosen Shalim Rodriguez Philippe Rola Colin Royse Yale Tung Chen mike wells Adrian Wong Wang Xiaoting Wang Zhen Yaseen Arabi 中国人民解放军空军军医大学航空航天医学系陕西西安710032 Department of Cardiac Sciences King Abdulaziz Medical City and King Abdullah International Medical Research Center 不详

新型冠状病毒肺炎(简称新冠肺炎,COVID-19)自首次报道以来,已造成全球超一亿人感染,给各国的公共卫生体系造成了巨大威胁。新冠肺炎的临床表现以呼吸系统体征和症状为主,80%的患者症状轻微,约5%为危重症患者,常表现为急性呼吸窘迫综合征... 详细信息

新型冠状病毒肺炎(简称新冠肺炎,COVID-19)自首次报道以来,已造成全球超一亿人感染,给各国的公共卫生体系造成了巨大威胁。新冠肺炎的临床表现以呼吸系统体征和症状为主,80%的患者症状轻微,约5%为危重症患者,常表现为急性呼吸窘迫综合征(ARDS)。前期,由于缺乏相关研究,面对日益紧迫的临床困境,医务人员不得不借鉴采取一些经验性措施以应对疫情。

关键词：体征和症状肺炎公共卫生体系呼吸系统首次报道专家共识疫情

Modern Shale Gas Horizontal Drilling： Review of Best Practices for Exploration Phase Planning and Execution

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中国石油勘探 2009年第3期14卷 41-50页

作者： Nathaniel Harding Stephen Smith John Shelton mike D. Burnaman Harding Shelton Group Oklahoma City Oklahoma 73102

The challenging characteristics of shale formations often require horizontal drilling to economically develop their potential. While every shale gas play is unique, there are several best practices for the proper planning and execution of a horizontal well. In planning a horizontal well, the optimal method and technology for building inclination and extending the lateral section must be determined. Properly specified logging-while-drilling tools are essential to keep the wellbore within the target formation. Planning must also focus on casing design. Doing so will help ensure stability and enable reliable and productive completions. Shales pose a challenge for these elements of well planning due to their thin strata and potentially low mechanical competence when foreign fluids are introduced. Once a plan is developed, executing it is even more important to prove a viable exploration program. Fast, efficient drilling with wellbore control and minimal torque and drag should be the priority. This may be achieved by focusing on fluid hydraulics and rheology and bottom hole assembly. Managed pressure drilling (MPD) will help fast drilling, well control and stability. If MPD can be combined with new generation rotary steerable systems that allow the drill string to maintain rotation, impressive efficiencies are possible. Modern drilling parameter analysis represents the newest opportunity for executing shale gas horizontal wells. A method for ROP analysis to improve operational parameters and equipment selection is also proposed.

关键词：页岩天然气石油地质勘探

Bank of America,Security First Network,wells Fargo——第一批电脑网络银行

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电子与电脑 1997年第1期4卷 24-25页

作者： mike Hogan 唐宏

有些人形象地称下列行为为银行赛跑:周五下午提前一会儿下班,在横贯城市的交通线路上狂奔,仅仅是为了在银行关门前赶到那里。以此开始过周末真不是件愉快的事,为什么不使用联机银行业务呢?这样做只要花几分钟,又不需要等待,你可以完成... 详细信息

有些人形象地称下列行为为银行赛跑:周五下午提前一会儿下班,在横贯城市的交通线路上狂奔,仅仅是为了在银行关门前赶到那里。以此开始过周末真不是件愉快的事,为什么不使用联机银行业务呢?这样做只要花几分钟,又不需要等待,你可以完成现在面对银行出纳员所能做的所有工作,而且这样的银行会一直开门处理业务。有三家新的联机银行系统开办了用户可以利用自己的PC处理业务的分行。通过Bank of America HomeBanking、Security First Network Bank以及wellsFargo Online Banking,用户可以了解帐户结余、过户、支付帐单甚至完成贷款业务。现在,你不必等待一个月才能了解哪些支票已经兑现,上述三种服务都能让你当天就了解帐户上每一笔业务的细节。

关键词：电脑网络银行联机银行系统银行业务

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保持大斜度井井眼清洁的有效方法

国外油田工程 2003年第3期19卷 19-21页

作者： mike Sewell 郑伯华赵社强徐合献杨利平中原石油勘探局井下特种作业处

井眼保洁问题几乎总是伴随着钻大斜度定向井而来的。如果能够及时钻至总井深,诸如高黏携屑剂、高机械钻速、大排量、频繁短程起钻和采用润滑剂这些传统方法,还可以赢得时间。然而,在长裸眼井段,井眼保洁必须是有效的,否则,油公司可能面... 详细信息

井眼保洁问题几乎总是伴随着钻大斜度定向井而来的。如果能够及时钻至总井深,诸如高黏携屑剂、高机械钻速、大排量、频繁短程起钻和采用润滑剂这些传统方法,还可以赢得时间。然而,在长裸眼井段,井眼保洁必须是有效的,否则,油公司可能面对井眼侧钻的问题。本文要介绍的是:加重携屑剂的基本应用、设计模型的限制/应用以及黏度、机械钻速和井下动力钻井的功效。在此提出设计携屑剂的基本条件和特殊的应用建议。

关键词：井眼清洗加重携屑剂设计模型油井大斜度井井眼清洁

护士定期随访与传统医学随访肺癌患者的效果:随机试验

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英国医学杂志中文版 2003年第2期6卷 127-127页

作者： Sally Moore Jessica Corner Jo Haviland Mary wells Emma Salmon Charles Normand mike Brada Mary O'Brien Ian Smith 韩锟

研究目的:评价护士定期随访对管理肺癌患者的效果。设计:随机对照试验。研究地点:英国东南部的一所肿瘤专科医院和三家癌症研究中心。研究对象:203例完成初始治疗并预期存活3个月以上的肺癌患者。干预措施:对非住院患者,护士定期随... 详细信息

研究目的:评价护士定期随访对管理肺癌患者的效果。设计:随机对照试验。研究地点:英国东南部的一所肿瘤专科医院和三家癌症研究中心。研究对象:203例完成初始治疗并预期存活3个月以上的肺癌患者。干预措施:对非住院患者,护士定期随访与传统预后随访进行比较。

关键词：护士定期随访肺癌随机试验预后传统医学