检索结果-南通市图书馆

Microbiology : :an introduction / 7th ed.; media update.

在线全文

学校读者我要写书评

暂无评论

计及分布式电源和负荷静态特性的最优低频减载

2001年

作者： Tortora gerard j.

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

华南理工大学学报（自然科学版） 2011年第10期39卷 139-145页

作者：刘志鹏文福拴 gerard Ledwich 华南理工大学电力学院广东广州510640 浙江大学电气工程学院浙江杭州310027 昆士兰科技大学工程系统系

低频减载被认为是当电力系统发生频率严重下降事故时所能采取的最后一项补救措施.针对配电系统中的低频减载问题,文中提出了计及分布式电源和负荷静态特性的最优低频减载策略.该策略以频率及频率变化率为执行依据,并由几个基本轮和一个... 详细信息

低频减载被认为是当电力系统发生频率严重下降事故时所能采取的最后一项补救措施.针对配电系统中的低频减载问题,文中提出了计及分布式电源和负荷静态特性的最优低频减载策略.该策略以频率及频率变化率为执行依据,并由几个基本轮和一个特殊轮组成.在基本轮中,按反馈控制律分轮次快速切除负荷,以保证频率摆脱紧急状态.而在特殊轮中,则优化分布式电源的出力和调整部分负荷,以保证频率恢复到安全状态并使系统运行参数最优.最后,以修改的IEEE 37节点配电系统为例来验证所提出的最优低频减载策略的有效性.

关键词：配电系统分布式电源低频减载基本轮特殊轮负荷静态特性

Microbiology : :an introduction / 7th ed.

在线全文

学校读者我要写书评

暂无评论

Impact of fine particles in ambient air on lung cancer

2002年

作者： Tortora gerard j.

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

Chinese journal of Cancer 2014年第4期33卷 197-203页

作者： gerard Hoek Ole Raaschou-Nielsen Institute for Risk Assessment Sciences Utrecht University Danish Cancer Society Research Center

Recently,the International Agency for Research on Cancer(IARC)has classified outdoor air pollution and the particulate matter component of outdoor air pollution as class I *** pollution is consistently associated with lung cancer in epidemiologic and experimental *** IARC assessment is specifically designed as hazard identification,and it does not quantify the magnitude of the cancer *** article addresses the magnitude of the lung cancer risk in the population due to ambient air pollution exposure.

关键词：环境空气污染肺癌微粒研究机构流行病学危害识别癌症颗粒物

Burns in the elderly:a nationwide study on management and clinical outcomes

在线全文

学校读者我要写书评

暂无评论

Burns & Trauma 2020年第1期8卷 71-81页

作者： Harold Goei Margriet E.van Baar jan Dokter j Vloemans gerard I.j.M.Beerthuizen Esther Middelkoop Kees H.van der Vlies the Dutch Burn Repository group Association of Dutch Burn Centres Burn CentreMaasstad HospitalRotterdamthe Netherlands Department of Plastic Reconstructive and Hand SurgeryAmsterdam Movement SciencesVU University Medical CentreAmsterdamthe Netherlands Burn Centre Maasstad Hospital Rotterdamthe Netherlands Burn Centre Red Cross Hospital Beverwijkthe Netherlands Burn Centre Martini HospitalGroningenthe Netherlands Association of Dutch Burn Centres Burn Centre Red Cross HospitalBeverwijkthe Netherlands Department of Public Health Erasmus Medical CentreRotterdamthe Netherlands 不详

Background:In modern-day burn care,advanced age remains an important predictor for mortality among burn *** this study,we compared the complete treatment trajectory(including prehospital and surgical treatment)and the outcomes between an elderly burn population and a younger adult burn ***:In this nationwide study,data from the Dutch Burn Repository were *** is a uniform national registration for Dutch specialized burn *** adult patients that were admitted to one of the three Dutch burn centres from the period 2009 to 2015 were included in the *** patients were considered as elderly when≥65 years of age,and were then further subdivided into three age categories:65–74,75–85 and 85+*** adults in the age category 18–64 years were used as the reference *** managementwas studied comprehensively and included timing of surgery,the number of procedures and details on the surgical technique,especially the technique used for debridement and the grafting technique that was *** the comparison of clinical outcome,the following parameters were included:mortality,wound infections,length of stay/TBSA(total body surface area)burned,discharge disposition and secondary ***:During the study period,3155 adult patients were included(elderly,n=505).Burn severity,reflected by the median TBSA,varied between 3.2–4.0%and was comparable,but aetiology and pre-hospital care were different between elderly and the younger adult reference *** treatment was initiated significantly faster in elderly burn patients(p<0.001).Less selective techniques for surgical debridement were used in the elderly burns patients(hydrosurgery,42.0%vs 23.5–22.6%),and on the other hand more avulsion(5.3%vs 7.3–17.6%)and primary wound closure(6.7%vs 24.5%).The most frequently used grafting technique was meshed skin grafts(79.2–88.6%);this was not related to *** increased rapidly with a higher age and showed a h

关键词： Burns Nationwide study Elderly Surgical management Clinical outcomes

Glade and Forest-Edge Plant Community Attributes for Three Glade Types in Arusha National Park, Tanzania

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American journal of Plant Sciences 2022年第4期13卷 457-472页

作者： Ladislaus W. Kahana gerard Malan Teresa j. Sylvina College of African Wildlife Management Mweka Moshi Tanzania Tshwane University of Technology Pretoria South Africa Bush-To-Base Solutions Inc. Christiansburg VA USA

The aim of the study was to compare glade and forest-glade edge plant community attributes for man-made, upper and lower natural glades. Two plots were set up in twelve glades at 2.5, 12.5 m and three plots in thirteen glades at 2.5, 12.5 and 22.5 m depending on the size of the glade. The results showed that plants total abundance, percentage basal cover, species richness and species diversity for upper and lower natural glades differed significantly p 2 = 15.95, df = 4, p Eleusine jaegeri, Heterogon contortus, Senna mimisoides, Digitaria scalarum, Clutia abyssinica) were habitat indicators for disturbed areas, wet humid grey/black clay soils for upper natural glades and three (Solanum incanum, Senna didymobotrya, and Pennistem mezianum, were indicators of overgrazed areas and black clay soils for man-made glades. In conclusion, plant species abundance, richness and diversity were highest at the forest-glade edge and decreased towards the glade interior, while plant species composition differed significantly between the three-glade types. The plant growth form for lower natural glades was associa

关键词： Forest Glade-Edge Glade Interior Plant Indicator Species Plant Species Diversity Plant Species Richness

In vitro 3D phenotypic drug screen identifies celastrol as an effective in vivo inhibitor of polycystic kidney disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Molecular Cell Biology 2020年第8期12卷 644-653页

作者： Tijmen H.Booij Wouter N.Leonhard Hester Bange Kuan Yan Michiel Fokkelman Anna j.Plugge Kimberley A.M.Veraar johannes G.Dauwerse gerard j.P.van Westen Bob van de Water Leo S.Price Dorien j.M.Peters Division of Toxicology Leiden Academic Centre for Drug Research(LACDR)Leiden UniversityLeidenThe Netherlands Present address:NEXUS Personalized Health Technologies ETH ZurichSwitzerland Department of Human Genetics Leiden University Medical Center(LUMC)LeidenThe Netherlands OcellO B.V. LeidenThe Netherlands Division of Medicinal Chemistry Leiden Academic Centre for Drug Research(LACDR)LeidenThe Netherlands

Polycystic kidney disease(PKD)is a prevalent genetic disorder,characterized by the formation of kidney cysts that progressively lead to kidney *** currently available drug tolvaptan is not well tolerated by all patients and there remains a strong need for alternative *** signalling rewiring in PKD that drives cyst formation is highly complex and not fully *** a consequence,the effects of drugs are sometimes difficult to *** previously established a high-throughput microscopy phenotypic screening method for quantitative assessment of renal cyst ***,we applied this 3D cyst growth phenotypic assay and screened 2320 small drug-like molecules,including approved *** identified 81 active molecules that inhibit cyst ***-parametric phenotypic profiling of the effects on 3D cultured cysts discriminated molecules that showed preferred pharmacological effects above genuine toxicological ***,a triterpenoid from Tripterygium wilfordii,was identified as a potent inhibitor of cyst growth in *** an in vivo iKspCre-Pkd1^lox,lox mouse model for PKD,celastrol inhibited the growth of renal cysts and maintained kidney function.

关键词： PKD celastrol pyrvinium pamoate high-content screening 3D

Modelling of massive particulates for breakwater engineering using coupled FEMDEM and CFD

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2008年第6期6卷 572-583页

作者： john-Paul Lathama Antonio Munjiza julian Mindel jiansheng Xiang Romain Guises Xavier Garcia Chris Pain gerard Gorman Matthew Piggott Department of Earth Science and Engineering Imperial College London UK Department of Engineering Queen Mary London University London UK

The seaward slope of many breakwaters consists of thousands of interlocking units of rock or concrete comprising a massive granular system of large elements each weighing tens of tonnes. The dumped quarry materials in the core are protected by progressively coarser particulates. The outer armour layer of freely placed units is intended to both dissipate wave energy and remain structurally stable as strong flows are drawn in and out of the particulate core. Design guidance on the mass and shape of these units is based on empirical equations derived from scaled physical model tests. The main failure mode for armour layers exposed to severe storms is hydraulic instability where the armour units of concrete or rock are subjected to uplift and drag forces which can in turn lead to rocking, displacement and collisions sufficient to cause breakage of units. Recently invented armour unit designs making up such granular layered system owe much of their success to the desirable emergent properties of interlock and porosity and how these combine with individual unit structural strength and inertial mass. Fundamental understanding of the forces governing such wave-structure interaction remains poor. We use discrete element and combined finite-discrete element methods to model the granular solid skeleton of randomly packed units coupled to a CFD code which resolves the wave dynamics through an interface tracking technique. The CFD code exploits several methods including a compressive advection scheme, node movement, and general mesh optimization. We provide the engineering context and report progress towards the numerical modelling of instability in these massive granular systems.

关键词： Modelling DEM Wave-structure interaction Armour units Breakwater

Real-Time Monitoring and Flagging of Extreme Value Forecasts A Practical Example and Interesting Findings

在线全文

学校读者我要写书评

暂无评论

journal of Earth Science and Engineering 2016年第4期6卷 191-199页

作者： gerard Croteau Meteorological Service of Canada Dorval Quebec H9P 1J3 Canada

Forecasts of record values are usually avoided unless expected to occur with great confidence within less than 48 hours, or in association with an extreme event such as a hurricane. Otherwise the risk of a high visibility false alarm outweighs the benefit of a correct early hit. Yet automated forecasts may occasionally include record values beyond day 2, which forecasters may choose to downplay, or not. In Canada, forecasters keep their focus on high impact weather for days l and 2, so that forecasts for day 3 and beyond are mostly automated and usually released after a quick glance. So a process was designed to bring up cases where automated temperature forecasts exceed known records for a number of sites, with the sole purpose of alerting the forecasters who may decide whether or not modifications are needed before release. As a by-product it is found that some record temperature forecasts are issued every day in Canada, even more records are actually observed, and in recent years there have been twice as many new high records as low ones. We discuss the origin of the process, its logics, its current status, interesting findings, and possible improvements.

关键词： Statistics temperature forecasts records