检索结果-南通市图书馆

The value of the INFEcTIONS scoring system in identifying bacterial infections among patients presenting at the emergency department of a middle-income country:A pilot study

在线全文

学校读者我要写书评

暂无评论

chinese Journal of Traumatology 2024年第2期27卷 77-82页

作者： Dooshanveer c.Nuckchady Department of Internal Medicine Victoria HospitalCandosMauritius

Purpose:To investigate which scoring system is the most accurate tool in predicting mortality among the infected patients who present to the emergency department in a middle-income country,and to validate a new scoring system to predict bacterial ***:This was a retrospective,single-center study among patients who were admitted via the emergency department of a public *** patients who were started on antibiotics were included in the study,while patients agedcollected includeding patients'demographics,vital signs and basic laboratory parameters like white blood cell count and *** sensitivity and specificity of different scoring systems were calculated as well as their negative and positive predictive *** regression was used to derive a novel early warning system for bacterial *** area under the receiver operating characteristic(AUROc)was computed for each scoring ***:In total,109 patients were included in this *** quick sequential organ failure assessment(qSOFA),search out severity and rapid acute physiology score had the highest AUROc(≥0.89)for predicting mortality,while qSOFA and universal vital assessment were the simplest scoring systems with an AUROc>0.85;however,these scoring systems failed to predict whether patients were truly *** INFEcTIONS(short for impaired mental status,not conscious,fast heart rate,elevated creatinine,high temperature,on inotrope,low oxygen,high neutrophils and high sugar)model reached an AUROc of 0.88 to more accurately predict the infectious state of a ***:Middle-income countries should use the qSOFA or universal vital assessment score to identify the sickest patients in emergency *** INFEcTIONS score may help recognize patients with bacterial infections,but it should be further validated in multiple countries prior to widely use.

关键词： Prognosis Mortality Bacterial infection INFEcTIONS scoring system Sequential organ failure assessment Prediction

长江中下游成矿带陆内斑岩型矿床的成岩成矿作用

在线全文

学校读者我要写书评

暂无评论

岩石学报 2016年第2期32卷 271-288页

作者：周涛发王世伟袁峰范裕张达玉常印佛 noel cwhite 合肥工业大学资源与环境工程学院合肥230009

陆内环境斑岩型矿床的发现对斑岩成矿理论的完善具有重要意义。长江中下游成矿带作为中国东部重要的陆内成矿带之一,成矿带内发育多个重要的斑岩型矿床,如铜山口cu-Mo矿床、鸡冠嘴cu-Au矿床、白云山cu矿、城门山cu-Mo矿床、武山cu-Mo矿... 详细信息

陆内环境斑岩型矿床的发现对斑岩成矿理论的完善具有重要意义。长江中下游成矿带作为中国东部重要的陆内成矿带之一,成矿带内发育多个重要的斑岩型矿床,如铜山口cu-Mo矿床、鸡冠嘴cu-Au矿床、白云山cu矿、城门山cu-Mo矿床、武山cu-Mo矿床、丰山洞cu-Au矿床、丁家山cu矿、洋鸡山Au矿、沙溪cu-Au矿床、冬瓜山cu-Au矿床、舒家店cu矿床和安基山cu矿床等。本文选取成矿带内典型的、具有代表性的斑岩型矿床,对其地质特征（地层、构造、含矿斑岩、脉体特征和围岩蚀变）、成岩成矿年代、成矿岩体的岩石化学和成岩成矿地球化学等方面的研究资料和成果进行了系统总结,讨论和试图阐明长江中下游成矿带陆内斑岩型矿床的成岩成矿作用与成矿模式。研究显示,长江中下游成矿带形成于燕山期陆内造山过程,成矿斑岩岩浆活动和成矿作用主要发生于149~105Ma之间,进一步可以分为早、中、晚三阶段：149~135Ma、133~125Ma和123~105Ma,三阶段岩浆活动和成矿作用主要发生于成矿带中的断隆区,早阶段（149~135Ma）和晚阶段（123~105Ma）多为斑岩-矽卡岩型矿化,中阶段（133~125Ma）矿化为典型的斑岩型矿化。长江中下游成矿带内斑岩型矿床的含矿斑岩为高钾钙碱性-钙碱性系列岩石,大部分具有埃达克岩的地球化学特征,可能为源自富集地幔的岩浆和加厚下地壳部分熔融的岩浆混合的产物,源自富集地幔的基性岩浆对成矿具有至关重要的作用,它的混入使得混合岩浆富水、硫和金属（cu、Au）等。进一步通过与岩浆弧环境的斑岩型矿床对比研究发现,长江中下游成矿带斑岩型矿床一般不发育高级泥化岩帽（advanced argillic liithocaps）以及浅部的高-中硫矿化蚀变系统,含矿岩浆源区性质和成矿物质来源等与岩浆弧环境的斑岩型矿床明显不同。

关键词：斑岩(-矽卡岩)型矿床成岩成矿作用成岩成矿模式长江中下游成矿带陆内环境

Westerly moisture transport to the middle of Himalayas revealed from the high deuterium excess

在线全文

学校读者我要写书评

暂无评论

chinese Science Bulletin 2005年第10期50卷 1026-1030页

作者： TIANLide YAOTandong J.W.c.white YUWusheng WANGNinglian LaboratoryofIcecoreandcoldRegionsEnvironment InstituteofTibetanPlateauResearchChineseAcademyofSciencesBeijing100085China InstituteofArcticandAlpineResearch UniversityofColoradoBoulderUSA LaboratoryofIcecoreandcoldRegionsEnvironment ColdandAridRegionsEnvironmentalandEngineeringResearchInstituteChineseAcademyofSciencesLanzhou730000China LaboratoryofIcecoreandcoldRegionsEnvironment ColdandAridRegionsEnvironmentalandEngineeringResearchInstituteChineseAcademyofSciencesLanzhou730000China

Previous studies found extremely high d-excess in both ice core and glacial melt water in Dasuopu glacier, Xixiabangma, middle of Himalayas. These values are much higher than the global average and those measured in southwest monsoon precipitation. The d-excess variation in over one year at Nyalam station will clarify this phenomenon. Studies show that the high d-excess is related to the seasonal variation of moisture transport to this region. The d-excess values are low during the southwest monsoon active periods, when moisture originated from the humid ocean surface. The d-excess values are higher in non-monsoon months, when moisture is derived from westerly transport. Winter and spring precipitation accounts for a substantial portion of the annual precipitation, resulting in higher d-excess in the yearly precipitation in the middle of Himalayas than other parts of the southern Tibetan Plateau. This finding reveals that the precipitation in the middle of Himalayas is not purely from southwest monsoon, but a large portion from the westerly transport, which is very important for ice core study in this area.

关键词：喜马拉雅山湿气传送器氘过剩

青海南部熔积岩的发现：对寻找VMS型矿床的重要启示

在线全文

学校读者我要写书评

暂无评论

矿床地质 2008年第3期27卷 336-344页

作者：杨志明侯增谦 noel c white 杨开辉宋玉财王召林中国地质科学院地质研究所北京100037 加拿大亚洲资源股份公司加拿大多伦多M2J4A6

熔积岩指的是侵入、混合到未固结或弱固结的湿沉积物中的熔浆分解、原位形成的一类特殊岩石。正确地认识该类岩石,有利于增进人们对岩浆-水(沉积物)相互作用过程的理解,恢复古环境。在青海南部沱沱河地区发现了一套角砾为撕片状、锯齿... 详细信息

熔积岩指的是侵入、混合到未固结或弱固结的湿沉积物中的熔浆分解、原位形成的一类特殊岩石。正确地认识该类岩石,有利于增进人们对岩浆-水(沉积物)相互作用过程的理解,恢复古环境。在青海南部沱沱河地区发现了一套角砾为撕片状、锯齿状及浑圆状的安山岩,胶结物为铁硅质组合的特殊熔积岩。研究表明,该熔积岩的角砾为岩浆遇水后快速淬火、裂解的产物,铁硅质组合为海底喷气沉积形成的含铁建造;且安山岩与含铁建造发生混合时,含铁建造尚未固结。该套熔积岩的发现,改变了长期以来对开心岭铁矿为火山热液交代安山岩而形成的认识,对于在矿区寻找VMS型矿床、区域内寻找海底热水喷流沉积型矿床具有重要的启示意义。

关键词：地质学熔积岩铁硅质岩 VMS型矿床开心岭铁矿沱沱河青海

Nano cuO/g-c_3N_4 sheets-based ultrafiltration membrane with enhanced interfacial affinity,antifouling and protein separation performances for water treatment application

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2019年第8期31卷 57-69页

作者： Thanigaivelan Arumugham Reshika Gnanamoorthi Amimodu noel Jacob Kaleekkal Dipak Rana Department of chemistry School of Advanced Sciences Vellore Institute of Technology (VIT) Department of Integrative Biology School of Bioscience and Technology Vellore Institute of Technology (VIT) Department of chemical Engineering National Institute of Technology Calicut Department of chemical and Biological Engineering Industrial Membrane Research Institute University of Ottawa

To improve the interfacial affinity and antifouling properties of polyphenylsulfone(PPSU)membrane, nano cuO/g-c3 N4(g-cN) sheets were synthesized via facile calcination route as one pot synthesis method. The uniformly assembled nanohybrid fillers, cuO on g-cN sheets were confirmed by using XRD, TEM, EDX and FTIR analysis. The non-solvent induced phase inversion technique was used to fabricate the nanohybrid ultrafiltration(UF)membranes by doping different concentration(0.5–1 wt.%) of nano cuO/g-c_3 N_4(g-cN)sheets within the PPSU matrix. The results of contact angle, atomic force microscopy,energy-dispersive X-ray spectroscopy reveal that surface structure and physico-chemical properties of nanohybrid membrane plays lead role in solute interaction and rejection compared to bare membrane, M0. Furthermore, the interfacial affinity of membrane was explored in detail via surface free energy, spreading coefficient, wetting tension and reversible work of adhesion analysis. Nanohybrid UF membrane, with 0.5% of the filler(M1)displayed remarkable permeation flux of 202, 131 L/m2/hr for pure water and protein solution, respectively while maintaining a high protein rejection(96%). Moreover, the exceptional dispersion of the nanosheets in the polymer matrix enhanced FRR(79%) and decreased the overall resistance of M1 compared to the pristine membrane(M0). Overall results suggest that the incorporation of nano sheets is a facile modification technique which improves the comprehensive membrane performance and holds a great potential to be further explored for water treatment.

关键词： Ultrafiltration membrane copper oxide Graphitic carbon nitride Interfacial affinity Antifouling Protein removal

Gaseous Nitrogen Losses from coastal Acid Sulfate Soils:A Short-Term Study

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2011年第2期21卷 197-206页

作者： B.c.T.MAcDONALD O.T.DENMEAD I.white G.BYRANT cSIRO Land and Water CanberraACT 2601 (Australia) The Fenner School of Environment and Society Australian National UniversityCanberraACT 0200 (Australia) University of Wollongong WollongongNSW 2500 (Australia)

NOx and N2O emissions from coastal acid sulfate soils （cASS） cultivated for sugarcane production were investigated on the coastal lowlands of northern New South Wales, Australia. Two series of short-term measurements were made using chambers and micrometeorological techniques. Series i occurred during the wet season, the water-filled pore space （WFPS） was between 60%-80% and the site flooded during the measurements. Measurements were made directly after the harvest of soybean crop, which fixed an estimated 100 kg N ha-1, and the emission amounted to 3.2 kg NOx-N ha-1 （12 d） and 1.8 kg N20-N ha-1 （5 d）. Series 2 was made towards the end of the dry season when the WFPS was less than 60%. In Series 2-1 after an application of 50 kg N ha-1, emissions were markedly less, amounting to 0.9 kg N ha 1 over 10 d. During both series when the soil was moist, emissions of NOx were larger than those of N2O. The emission of NOx appeared to be haphazard, with little time dependence, but there was a clear diurnal cycle for N2O, emphasising the need for continuous measurement procedures for both gases. These results suggest that agricultural production on cASS could be important sources of greenhouse gases and nitrogen practices will need to be optimised to reduce the offsite effects of atmospheric warming, acidification or nitrification. Many questions still remain unanswered such as the emissions during the soybean bean filling stage and crop residue decomposition, the longer-term losses following the fertiliser application and emissions from cASS under different land uses.

关键词： denitrification greenhouse gases nitrification nitrogen oxides nitrous oxide

云南哈播斑岩型铜(-钼-金)矿床地质与成矿背景研究

在线全文

学校读者我要写书评

暂无评论

地质学报 2009年第12期83卷 1915-1928页

作者：祝向平莫宣学 noel c.white 张波孙明祥王淑贤赵思礼杨勇成都地质矿产研究所成都610081 中国地质大学地球与资源学院北京100083 ARc center of Excellence in Ore Deposit University of TasmaniaHobartTasmania7001Australia 北京大学地球与空间科学学院北京100871 Asia Now Resources corp. 昆明650021 国家地质实验测试中心北京100037

哈播斑岩铜(-钼-金)矿床位于哀牢山-红河新生代成矿带南端西侧,是近年来新发现的一个斑岩型矿床。矿区内出露的哈播侵入体具有多期侵入的特征,花岗岩依次侵入的序列为坪山花岗岩、三道班花岗岩、阿树花岗岩、哈播南山花岗岩(37.3Ma),随... 详细信息

哈播斑岩铜(-钼-金)矿床位于哀牢山-红河新生代成矿带南端西侧,是近年来新发现的一个斑岩型矿床。矿区内出露的哈播侵入体具有多期侵入的特征,花岗岩依次侵入的序列为坪山花岗岩、三道班花岗岩、阿树花岗岩、哈播南山花岗岩(37.3Ma),随后有4期斑岩侵入到哈播南山花岗岩中,依次为黑云母钾长石斑岩、石英钾长石斑岩、石英二长斑岩和晚期黑云母钾长石斑岩岩脉。采用LA-IcP-MS锆石U-Pb年龄法测定黑云母钾长石斑岩和石英二长斑岩的加权平均年龄分别为36.20±0.20Ma和36.19±0.22Ma,哈播南山花岗岩和4期斑岩具有相似的岩石地球化学特征,都有富钾、高氧化态和类似岛弧花岗岩的岩石地球化学特征,可能具有相同的来源。辉钼矿Re-Os年龄显示,哈播矿床的成矿年龄为35.47±0.16Ma。相似的成岩-成矿年龄暗示哈播矿床成岩和成矿作用是一个连续的岩浆-热液过程,与玉龙斑岩铜矿相似。基于哈播矿床的岩石学、地球化学特点,结合前人关于青藏高原东部斑岩铜矿的研究成果,我们认为哈播斑岩矿床可能为藏东富碱斑岩带向东南的延伸,与玉龙斑岩铜矿带具有相似的成因,为哀牢山-红河新生代成矿带的重要组成部分,是晚碰撞构造转换背景下的重要产物。

关键词：哈播斑岩铜矿藏东斑岩带玉龙斑岩铜矿带

Endovascular treatment of vasculogenic erectile dysfunction

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2015年第1期17卷 40-43,I0007页

作者： Edward D Kim Ryan c Owen Gregory S white Osama O Elkelany cyrus D Rahnema University of Tennessee Graduate School of Medicine Knoxville TN USA.

The treatment of erectile dysfunction （ED） has been a fascination involving multiple medical specialities over the past century with urologic, cardiac and surgical experts all contributing knowledge toward this multifactorial disease. With the well-described association between ED and cardiovascular disease, angiography has been utilized to identify vasculogenic impotence. Given the success of endovascular drug-eluting stent （DES） placement for the treatment of coronary artery disease, there has been interest in using this same technology for the treatment of vasculogenic ED. For men with inflow stenosis, DES placement to bypass arterial lesions has recently been reported with a high technical success rate. comparatively, endovascular embolization as an approach to correct veno-occlusive dysfunction has produced astonishing procedural success rates as well. However, after a thorough literature review, arterial intervention is only recommended for younger patients with isolated vascular injuries, typically from previous traumatic experiences. Short-term functional outcomes are less than optimal with long-term results yet to be determined. In conclusion, the hope for a minimally invasive approach to ED persists but additional investigation is required prior to universal endorsement.

关键词： erectile dysfunction impotence penile erection vasculogenic

An Iterative Pose Estimation Algorithm Based on Epipolar Geometry With Application to Multi-Target Tracking

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IEEE/cAA Journal of Automatica Sinica 2020年第4期7卷 942-953页

作者： Jacob H.white Randal W.Beard the Brigham Young University ProvoUtah 84058 USA

This paper introduces a new algorithm for estimating the relative pose of a moving camera using consecutive frames of a video sequence. State-of-the-art algorithms for calculating the relative pose between two images use matching features to estimate the essential matrix. The essential matrix is then decomposed into the relative rotation and normalized translation between frames. To be robust to noise and feature match outliers, these methods generate a large number of essential matrix hypotheses from randomly selected minimal subsets of feature pairs, and then score these hypotheses on all feature pairs. Alternatively, the algorithm introduced in this paper calculates relative pose hypotheses by directly optimizing the rotation and normalized translation between frames, rather than calculating the essential matrix and then performing the decomposition. The resulting algorithm improves computation time by an order of magnitude. If an inertial measurement unit(IMU) is available, it is used to seed the optimizer, and in addition, we reuse the best hypothesis at each iteration to seed the optimizer thereby reducing the number of relative pose hypotheses that must be generated and scored. These advantages greatly speed up performance and enable the algorithm to run in real-time on low cost embedded hardware. We show application of our algorithm to visual multi-target tracking(MTT) in the presence of parallax and demonstrate its real-time performance on a 640 × 480 video sequence captured on a UAV. Video results are available at https://***/Hh K-p2 h XNn U.

关键词： Aerial robotics epipolar geometry multi-target tracking pose estimation unmanned aircraft systems vision-based flight