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Evaluation of ventilation performance and energy efficiency of greenhouse fans

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International Journal of Agricultural and Biological Engineering 2015年第1期8卷 103-110页

作者： Zhang Zhi Richard s Gates Zou Zhirong Hu Xiaohui College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100China Department of Agriculture and Biological Engineering University of Illinois at Urbana-Champaign61801USA College of Horticulture Northwest A&F UniversityYangling 712100China

In order to investigate fan performance in fan-ventilated greenhouses(Urbana,UsA),the effects of guard screen and loose belts on fan ventilation airflow and power consumption in greenhouse operations were examined with four belt-driven fans as trial *** Fans Assessment Numeration system was used to measure the airflow ***,relative humidity and power consumption were also *** show there were significant differences in the airflow rate between the fans with a cleaned and uncleaned guard screen(Psumption also differed significantly even with the same cooling effect in *** fan belts were adjusted to the proper tension,the fan speed and airflow rate were 13.1% and 30.1% higher than those of original belts,*** daily average power consumption for the fan with the original loose belts was 20.4% higher than that with the adjusted belts when the pad was not working and 24.2% higher with pad *** ventilation performance of fans with identical specifications showed a variation by up to 13.0% in terms of the ventilating efficiency *** results demonstrated that fans should be cleaned routinely,and belt tension should be checked to ensure that fan performance meets *** can reduce the power consumption in greenhouses for environmental ***,reordering fan staging,so that the most efficient fans are used in areas of greatest demand,can also reduce ventilation energy costs.

关键词： greenhouse fan performance airflow rate power consumption efficiency ratio

A Characterization of PsL(3. q) for q=2~m

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Acta Mathematica sinica,English series 2002年第3期18卷 463-472页

作者： A.IRANMANEsH s.H.ALAVI B.KHOsRAVI Department of Mathematics Tarbiat Modarres University P. O. Bax: 14115-137 Tehran. Iran Institute of Studies in Theoretical Physics and Mathematics Tehran Iran

The order components of a finite group are introduced in [12]. In [9], it is proved that the group PsL(3, q), where q is an odd prime power, is uniquely determined by its order components. In this paper, we show that ... 详细信息

关键词： Finite group simple group Prime graph Order component

Oscillatory flow of second grade fluid in cylindrical tube

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Applied Mathematics and Mechanics(English Edition) 2013年第9期34卷 1097-1106页

作者： A.ALI s.AsGHAR H.H.ALsULAMI Laboratoire Jean Alexandre Dieudonne Universite de Nice Sophia Antipolis Department of Mathematics Commission on Science and Technology for Sustainable Development in the SouthInstitute of Information Technology Department of Mathematics King Abdulaziz University

The unsteady oscillatory flow of an incompressible second grade fluid in a cylindrical tube with large wall suction is studied analytically. Flow in the tube is due to uniform suction at the permeable walls, and the oscillations in the velocity field are due to small amplitude time harmonic pressure waves. The physical quantities of interest are the velocity field, the amplitude of oscillation, and the penetration depth of the oscillatory wave. The analytical solution of the governing boundary value problem is obtained, and the effects of second grade fluid parameters are analyzed and discussed.

关键词： second grade fluid cylindrical coordinate oscillatory flow incompressible flow laminar flow Navier-stokes equation partial differential equation Wentzel- Kramers-Brillouin (WKB) approximation

First-line eradication of H pylori infection in Europe:A metaanalysis based on congress abstracts,1997-2004

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World Journal of Gastroenterology 2006年第33期12卷 5311-5319页

作者： Gyrgy M Buzás Jolán Józan Ferencváros Health Center Gastroenterology Budapest Hungary National Institute of Traumatology Department of Experimental Medicine Budapest Hungary

AIM： To meta-analyse the European abstracts presented between 1997-2004 at the European Hpylori study Group, United European Gastroenterology Week meetings and World Congresses of Gastroenterology. METHODs： The abstracts of randomized/controlled prospective studies were classified into groups based on first-line eradication schedules. The quality of the abstracts was checked by a validated score system. The pooled eradication rates （PER） and combined odds ratios （OR） were calculated and compared with the published meta-analyses. REsULTs： The PER of proton pump inhibitor-based （PPI） one week triple therapies was 81.4% （confidence interval, 95% CI： 78.5-84.5）. Ranitidine bismuth citratebased （RBC） triple regimens have an efficiency rate of 78.5% （95% CI： 70.5%-84.3%）（P = 0.28 vs PPI）. The OR for PPI effect vs RBC regimens was 1.1 （95% CI： 0.92-1.30）. H2 receptor antagonist-based triple therapies achieved 64.1% （95% CI： 52.6-75.6）（P = 0.02 〈 0.05 vs PPI）, the OR vs PPI regimens was 1.55 （95% CI： 0.72-3.78）. PPI-based double combinations were less efficient than triple regimens （PER： 55.0%, OR： 4.90, 95% CI： 2.36-9.70）. Quadruple regimens were successful in 82.6% （95% CI： 76.0-89.7）, the OR vs triple therapies was 0.80 （0.62-1.03）. Clarithromycin ＋ amoxicillin or nitroimidazole combinations were efficient in 80.5% （95% CI： 77.2-84.2） and 83.8% （95% CI： 81.7-85.9）, respectively. Amoxicillin ＋ nitromidazole therapies eradicated the infection in 73.5% （66.6-78.5）（P = 0.01 〈 0.05 vs clarithromycin-based regimens）. CONCLUsION： PPI/RBC-based triple therapies achieved comparable results with the meta-analyses. H2-receptor antagonists and PPI-based double combinations were less efficient. Triple and quadruple regimens were equally effective. Clarithmmycin ＋ either amoxicillin or nitroimidazole containing regimens were more effective than amoxicillin ＋ nitroimidazole combinations. High quality congress abstracts constitutes a valuable pool of data which is suitable for

关键词： Antimicrobials Eradication H pylori Protonpump Inhibitors Ranitidine bismuth citrate

Provenance discrimination and source-to-sink studies from a dryland fluvial regime:An example from Kachchh,western India

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International Journal of sediment Research 2014年第1期29卷 99-109页

作者： s.P.PRIZOMWALA Nilesh BHATT N.BAsAVAIAH Institute of seismological Research Department of Geology The M.S.University of Baroda Indian Institute of Geomagnetism

Tracing the sediment delivery from its source terrain to its ultimate sink envisage multiple factors that play a vital role in understanding present day erosional *** accomplish this,it is significant to distinguish the variable end-members contributing to the *** findings from the study of dryland coastal fluvial regime in Kachchh(Western India),which is one of the end members contributing to the Gulf of Kachchh coast(partial sink) and finally to the Arabian sea(ultimate sink) have been presented ***-proxy sediment provenance proxies such as grain-size,clay minerals,geochemistry and magnetic minerals have been employed to evaluate the provenance discriminating characteristics of the Kachchh dryland fluvial system and factors influencing *** results of different proxies indicate that the provenance signatures of uplands are quite characteristic with magnetic susceptibility(χ) values of smectite(s)/kaolinite(K) ratio between 0.26 and *** middle reaches show marked increase in magnetic mineral concentration with χ values(140×10-7m3kg-1)and s/K ratio(4.92),while the estuarine tract shows χ values(80×10-7m3kg-1),s/K ratio(1.90) and,characteristic heavy minerals(*** minerals),probably reflect the interplay between land and sea *** sources of sediments within catchment scale were identified,viz.,upland sedimentary rocks(Juran and Bhuj Formation sandstone-shale) and middle reaches volcanic(Deccan Trap Formation basalt) *** present study draw cautions in provenance of sediment discrimination in areas influenced by Deccan basalt that has the overwhelming sediment delivery and a comparatively subdued effects of other provenance *** studied proxies of mineralogy of clays,magnetic minerals and geochemistry of heavy and major elements serve as the potential for fingerprint of sediment source regions and hence behold a strong position in source to sink studies globally.

关键词： Provenance source-to-sink Heavy minerals Clay minerals Kachchh

Two-dimensional numerical and eco-toxicological modeling of chemical spills

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Frontiers of Environmental science & Engineering 2009年第2期3卷 178-185页

作者： suiliang HUANG Yafei JIA sam s.Y.WANG Numerical simulation Group for Water Environment Key Laboratory of Pollution Processes and Environmental Criteria of Ministry of EducationTianjin Key Laboratory of Environmental Remediation and Pollution ControlCollege of Environmental Science and EngineeringNankai UniversityTianjin 300071China National Center for Computational Hydroscience and Engineering The University of MississippiOxfordMS 38677USA

The effects of chemical spills on aquatic nontarget organisms were evaluated in this *** on a review of three types of current eco-toxicological models of chemicals,i.e.,ACQUATOX model of the Us-EPA,Hudson River Model of PCBs,and critical body residual(CBR)model and dynamic energy budget(DEBtox)model,this paper presents an uncoupled numerical ecotoxicological *** transport and transformation of spilled chemicals were simulated by a chemical transport model(including flow and sediment transport),and the mortalities of an organism caused by the chemicals were simulated by the extended threshold damage model,*** to extreme scarcity of data,this model was applied to two hypothetical cases of chemical spills happening upstream of a *** analysis and simulated results indicated that this model is capable of reasonably predicting the acute effects of chemical spills on aquatic ecosystems or organism killings.

关键词： chemical spills acute effects aquatic ecosystem eco-toxicological modeling

Prof. Robert s. Warren: come early, stay late and listen

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Hepatobiliary surgery and Nutrition 2020年第1期9卷 122-123页

作者：无 Robert s.Warre HBsN the University of California school of Medicine

Expert’s introduction Robert ***,MD(Figure 1)is a Professor of surgery in the University of California school of Medicine and a specialist in gastrointestinal and liver *** earned a medical degree at the University of Minnesota,where he completed a general surgery *** completing an oncology research fellowship at Memorial sloan-Kettering Cancer Center in New York,***,joined UCsF Medical Center in 1988.A board-certified surgeon,he later became the Chief of surgical Oncology at *** respected by his peers,*** was named to the list of ***"America’s Top Doctors",a distinction reserved for the top 1%of physicians in the nation for a given *** research focuses on the biology of colorectal cancer(CRC)and how it spreads.

关键词： surgery Figure Warren

EXIsTENCE OF sOLUTIONs OF NONLINEAR FRACTIONAL PANTOGRAPH EQUATIONs

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Acta Mathematica scientia 2013年第3期33卷 712-720页

作者： K. BALACHANDRAN s. KIRUTHIKA J. TRUJILLO Department of Mathematics Bharathiar University Universidad de La Laguna Departamento de Anlisis Matemtico38271 La Laguna Tenerife Spain

This article deals with the existence of solutions of nonlinear fractional pantograph equations. such model can be considered suitable to be applied when the corresponding process occurs through strongly anomalous media. The results are obtained using fractional calculus and fixed point theorems. An example is provided to illustrate the main result obtained in this article.

关键词： Fractional differential equations pantograph equations fixed point theorems

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“正义化身”狴犴

艺术品鉴 2024年第1期 54-54页

作者： s-Rong 不详

七子狴犴(bì’àn),形似虎,好讼,狱门或官衙正堂两侧有其像。狴犴又名宪章((1)),是龙之九子的老七,其外形类似老虎,跟四象中的“白虎”外形类似。狴犴喜欢惩恶扬善,尤其喜欢惩治坏人。狴犴的战斗力在九只龙子中仅次于睚眦,加之它外形威... 详细信息

七子狴犴(bì’àn),形似虎,好讼,狱门或官衙正堂两侧有其像。狴犴又名宪章((1)),是龙之九子的老七,其外形类似老虎,跟四象中的“白虎”外形类似。狴犴喜欢惩恶扬善,尤其喜欢惩治坏人。狴犴的战斗力在九只龙子中仅次于睚眦,加之它外形威猛,所以古代的衙门、监牢中都雕刻有狴犴的形象。

关键词：惩恶扬善外形类似白虎