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The influence of tree transmissivity variations in winter on satellite snow parameter observations

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International Journal of Digital Earth 2021年第10期14卷 1337-1353页

作者： Qinghuan Li Richard Kelly Juha Lemmetyinen Roger D.de roo Jinmei Pan Yubao Qiu Geography and Environmental Management University of WaterlooWaterlooCanada Aerospace Information Research Institute Chinese Academy of SciencesBeijingPeople’s Republic of China Finnish Meteorological Institute HelsinkiFinland Climate and Space Sciences and Engineering University of MichiganAnn ArborMIUSA

The ability to correct for the influence of forest cover is crucial for retrieval of surface geophysical parameters such as snow cover and soil properties from microwave remote *** correction approaches to brightness temperatures for northern boreal forest regions consider forest transmissivity constant during ***,due to biophysical protection mechanisms,below freezing air temperatures freeze the water content of northern tree species only *** a consequence,the permittivity of many northern tree species decreases with the decrease of air temperature under sub-zero temperature *** results in a monotonic increase of the tree vegetation transmissivity,as the permittivity contrast to the surrounding air *** influence of this tree temperature-transmissivity relationship on the performance of the frequency difference passive microwave snow retrieval algorithms has not been *** ground-based observations and an analytical model simulation based on Mätzler’s approach(1994),the influence of the temperaturetransmissivity relationship on the snow retrieval algorithms,based on the spectral difference of two microwave channels,is characterized.A simple approximation approach is then developed to successfully characterize this influence(the RMSE between the analytical model simulation and the approximation approach estimation is below 0.3 K).The approximation is applied to spaceborne observations,and demonstrates the capacity to reduce the influence of the forest temperature-transmissivity relationship on passive microwave frequency difference brightness temperature.

关键词： Passive microwave snow forest

Role of stress,slenderness and foliation on large anisotropic deformations at deep underground excavations

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International Journal of Mining Science and Technology 2021年第4期31卷 577-590页

作者： Bo Hu Mostafa Sharifzadeh Xiating Feng Wenbin Guo roo Talebi State Key Laboratory of Mountain Bridge and Tunnel Engineering School of Civil EngineeringChongqing Jiaotong UniversityChongqing 400074China Northern Star Resources Ltd. KalgoorlieWA 6430Australia Key Laboratory of Ministry of Education on Safe Mining of deep Metal Mines Northeastern UniversityShenyang 110819China Engineering Research Centre for the Safe Exploitation and Comprehensive Utilization of Mineral Resources at Universities of Inner Mongolia Hulunbuir UniversityHulunbuir 021008China Western Australian School of Mines(WASM) Curtin UniversityKalgoorlieWA 6430Australia

High stress concentrations around underground excavations can result in significant damage to deep hard-rock *** conditions can be the result of stopping activities,blasting,seismicity,or other mining *** anisotropic deformation and excavation closure,especially under high-stress conditions,are expected if the excavation is located in a foliated or thin-bedded rock *** this research,the behaviour of excavations under deep and high-stress conditions was investigated and *** main purpose was to enhance the existing knowledge of managing large anisotropic deformations and to help prepare suitable measures for handling such *** simulations using the distinct element method(deM)and model calibration were performed to reproduce the anisotropic deformation of an ore drive based on the collected field ***,the roles of key factors(*** ratio,slenderness ratio,foliation orientation,and foliation considering excavation orientation)on the large deformation and damage depth of the excavations were *** study found that increasing both the stress ratio and slenderness ratio induced linear increases in wall closure and damage depth,whereas increasing the foliation angle first increases the deformation and damage depth and then reduces them both before and after 45.The wall closure and damage thickness decreased with increasing orientation *** deformation and damage levels were classified based on these factors.

关键词： Large anisotropic deformation Buckling deep mining Slenderness ratio Intercept angle Foliation orientation

A late dissociation of the ceramic component of a sandwich liner cup in a total hip arthroplasty<br>—Case report and review of the literature

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Case Reports in Clinical Medicine 2013年第2期2卷 138-140页

作者： Pieter-Jan de roo Franky Steenbrugge Martijn Raaijmaakers department of Orthopaedic Surgery & Traumatology Aalst Belgium

We present a case of a 71-year-old woman with unexplained instability of her total hip arthroplasty 12 years after implantation due to loosening of the ceramic component of a sandwich ceramic in polyethylene liner. She experienced in total 2 dislocations in 6 months. These events occurred without fracture of the ceramic liner. Sandwich ceramic liners were introduced with the idea of combining the benefits of ceramic and polyethylene bearings in total hip arthroplasty in order to reduce wear and to allow a ceramic on ceramic bearing to be used in a cup designed for polyethylene inserts only. Although some reports showed promising early results, case reports and later on retrospective analysis showed high fracture rates of the ceramic liner component. We believe that loosening of the ceramic component may precede fracture of the liner and that a ceramic on ceramic configuration is preferable.

关键词： Total Hip Arthroplasty Sandwich Cup Complication Hip Instability Cup Revision

Antibacterial approaches in tissue engineering using metal ions and nanoparticles:From mechanisms to applications

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Bioactive Materials 2021年第12期6卷 4470-4490页

作者： Maria Godoy-Gallardo Ulrich Eckhard Luis M.delgado Yolanda J.D.de roo Puente Mireia Hoyos-Nogués F.Javier Gil Roman A.Perez Bioengineering Institute of Technology Universitat Internacional de CatalunyaCarrer de Josep Trueta08195del VallèsSant CugatBarcelonaSpain Proteolysis Lab Department of Structural BiologyMolecular Biology Institute of BarcelonaCSICBarcelona Science ParkBaldiri Reixac 15-2108028BarcelonaSpain

Bacterial infection of implanted scaffolds may have fatal consequences and,in combination with the emergence of multidrug bacterial resistance,the development of advanced antibacterial biomaterials and constructs is of great *** decades ago,metals and their ions had been used to minimize bacterial infection risk and,more recently,metal-based nanomaterials,with improved antimicrobial properties,have been advocated as a novel and tunable alternative.A comprehensive review is provided on how metal ions and ion nanoparticles have the potential to decrease or eliminate unwanted *** mechanisms such as oxidative stress induction,ion release and disruption of biomolecules are currently well ***,the exact antimicrobial mechanisms of the discussed metal compounds remain poorly *** combination of different metal ions and surface decorations of nanoparticles will lead to synergistic effects and improved microbial killing,and allow to mitigate potential side effects to the *** with a general overview of antibacterial mechanisms,we subsequently focus on specific metal ions such as silver,zinc,copper,iron and gold,and outline their distinct modes of ***,we discuss the use of these metal ions and nanoparticles in tissue engineering to prevent implant failure.

关键词： Metal ions Metal nanoparticles Mechanism of action Antibacterial activity Tissue engineering Biomaterials applications

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下一个宠物时代是……恐龙世纪?

疯狂英语（初中天地） 2008年第7期 20-21页

作者： roo TV 许婉燕

从当年的电子宠物鸡到后来的Q宠、现在的多猫(更不必说那多如牛毛的养成游戏),日新月异的科技在我们的电脑及各种游戏平台上不断推出千奇百怪的虚拟宠物。你厌倦虚拟宠物了吗?但又缺乏时间和精力照顾真动物?不如关注Pleo吧!今年年初,这... 详细信息

从当年的电子宠物鸡到后来的Q宠、现在的多猫(更不必说那多如牛毛的养成游戏),日新月异的科技在我们的电脑及各种游戏平台上不断推出千奇百怪的虚拟宠物。你厌倦虚拟宠物了吗?但又缺乏时间和精力照顾真动物?不如关注Pleo吧!今年年初,这只高智能的机器恐龙宝宝终于在国内全面登陆了哦!

关键词：机器人

Patient Trust in Physicians： Empirical Evidence from Shanghai, China

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Chinese Medical Journal 2016年第7期129卷 814-818页

作者： Da-Hai Zhao Ke-Qin Rao Zhi-roo Zhang School of International and Public Affairs Shanghai Jiao Tong University Shanghai 200030 China Chinese Medical Association Beijing 100710 China SchooJ of Pubric Health Shanghai Jiao Tong University Shanghai 200025 China

Background： Patient trust in physicians, which can be considered a collective good, is necessary tot an effective health care system. However, there is a widespread concern that patient trust in physicians is declining under various threats to the physician patient relationship worldwide. This article aimed to assess patient trust in physicians through a quantitative study in Shanghai, China, and to provide appropriate suggestions for improving the trust in China. Methods： The data from a survey conducted in Zhongshan Hospital and Shanghai Tenth People＇s Hospital which are two tertiary public hospitals in Shanghai, were used in this study. Patient trust in physicians was the dependent variable. Furthermore, a 10-item scale was used to precisely describe the dependent variable. The demographic characteristics were independent variables of trust in physicians. Binomial logistic regression was employed to analyze the fhctors associated with the dependent variable, which was divided into two categories on the basis of the responses （1： Strongly agree or agree and 0： Strongly disagree, disagree, or neutral）. Results： This study tbund that 67% of patients trusted or strongly trusted physicians. The mean score of patient trust in physicians was 35.4 from a total score of 50. Furthermore, patient trust in physicians was significantly correlated with the age, education level, annual income, and health insurance coverage of the patients. Conclusions： Patient trust in physicians in Shanghai, China is higher than previously reported. Furthermore, the most crucial reason for patient distrust in physicians is the information asymmetry between patients and physicians, which is a natural property of the physician patient relationship, rather than the so-called for-profit characteristic of physicians or patients＇ excessive expectations.

关键词： Patient Trust Physician Patient Relationship Public Hospital

前往结直肠癌多学科门诊寻求第二意见的患者特征

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结直肠肛门外科 2020年第3期26卷 361-363页

作者：竺平 de roo A C MORRIS A M VU J V 江苏省中医院肛肠外科江苏南京210029 不详

目的:由于疾病复杂、与初诊医师治疗关系中断、需要重建信心以及渴望获得其他治疗意见而寻求第二意见的患者对于接诊的结直肠肿瘤医师而言是一项挑战。本研究描述在一家结直肠癌多学科门诊寻求初次和第二意见的结直肠癌患者情况及其接... 详细信息

目的:由于疾病复杂、与初诊医师治疗关系中断、需要重建信心以及渴望获得其他治疗意见而寻求第二意见的患者对于接诊的结直肠肿瘤医师而言是一项挑战。本研究描述在一家结直肠癌多学科门诊寻求初次和第二意见的结直肠癌患者情况及其接受治疗的特点。方法:前瞻性收集一家结直肠癌多学科门诊的临床登记资料,对2012—2017年中寻求治疗意见的结肠癌或直肠癌患者的临床信息特征进行回顾性分析。

关键词：结直肠肿瘤结直肠癌临床信息登记资料直肠癌患者结肠癌患者特征门诊

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新款笔记本电脑导购

电脑爱好者 2002年第12期 78-79页

作者： roo

近一两年,笔记本电脑销量也持续上升,2001年在欧美市场上甚至超过了传统的台式电脑。在消费能力较低的中国,笔记本电脑的销量虽然没有这么好的成绩,但也呈现出逐年快速增长的情况。笔记本电脑之所以越来越受到青睐,和它的性能和价格越... 详细信息

近一两年,笔记本电脑销量也持续上升,2001年在欧美市场上甚至超过了传统的台式电脑。在消费能力较低的中国,笔记本电脑的销量虽然没有这么好的成绩,但也呈现出逐年快速增长的情况。笔记本电脑之所以越来越受到青睐,和它的性能和价格越来越贴近普通用户的需求有很大的关系,首先笔记本电脑的CPU和图像处理芯片的运算处理能力,已经能够满足绝大部分用户的需求,现在最快的笔记本电脑运算处理性能已经可以达到最快的个人台式电脑的70％。与此同时,笔记本电脑的产量逐渐增加也促进了笔记本电脑的成本下降,在不久的将来甚至现在,笔记本电脑已成了很实在的消费产品,针对我们读者的消费能力,我们这次介绍的笔记本电脑基本上是以15000元以下的产品为主。

关键词：笔记本电脑销量用户笔记本计算机显示芯片运算处理

大坝的效益和涉及到的有关问题：国际大坝会议专题77之总报告（2000，北京）

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国外水电技术 2000年第3期13卷 33-52页

作者： roo,HE 张翠勤