检索结果-南通市图书馆

环形蓄热片相变材料固化时热传导问题的Green函数瞬时解

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

应用数学和力学 2012年第10期33卷 1180-1188页

作者： A·H·莫莎法 F·塔拉蒂 m·A·罗森 H·b·塔布瑞兹大布里士大学机械工程学院伊朗安大略理工大学工程和应用科学学院加拿大奥沙华ONL1H7K4 艾姆卡波技术大学机械工程学院伊朗德黑兰

当环形蓄热片为相变材料所固化时,应用Green函数法分析其瞬时的温度分布.在一个柱形壳体中存储该相变材料(PCm),蓄热片上固体相变材料的厚度随时间而变化,并由megerlin法求得.找到模型用bessel方程构成的分析解,讨论了3种不同类型的边... 详细信息

当环形蓄热片为相变材料所固化时,应用Green函数法分析其瞬时的温度分布.在一个柱形壳体中存储该相变材料(PCm),蓄热片上固体相变材料的厚度随时间而变化,并由megerlin法求得.找到模型用bessel方程构成的分析解,讨论了3种不同类型的边界条件,给出了解析解和数值解的比较.结果表明,所有情况下得到的蓄热片温度分布精度是令人满意的.

关键词：环形蓄热片解析解 Green函数相变材料(PCm) 固化热能的存储

Solar-powered b.m.oo Culm Prefabricated Housing

在线全文

学校读者我要写书评

暂无评论

Chinese Forestry Science and Technology 2012年第Z1期11卷 20-28页

作者： FRITH Oliver b International Network for b.m.oo and Rattan

The solar-powered hybrid energy system has been put into practice in Hunan b.m.oo culm prefabricated housing and was enrolled in this *** this paper,the experimental data which was taken from a demonstration house highlighted that this system has a high potential for integrated solar energy *** average thermal efficiency of the collector was 58.68%,and the thermal conductivity coefficient of b.m.oo culm prefabricated composite wall was 1.075 W/(m2 K).based on these results,b.m.oo culms could be used as the main structural material and heat storage slow-release flooring in the prefabricated *** housing was lower in energy consuming.

关键词： solar energy b.m.oo culm prefabricated housing integrated technology

Electronic and thermoelectric properties of alkali metal-based perovskites CsYbF3 and RbYbF3

在线全文

学校读者我要写书评

暂无评论

Chinese Physics b 2020年第11期29卷 473-478页

作者： Q mahmood N A Noor T Ghrib Nessrin A Kattan Asif mahmood Shahid m Ramay basic and Applied Scientific Research Center Imam Abdulrahman Bin Faisal UniversityP.O.Box 198231441DammamSaudi Arabia Department of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 198231441DammamSaudi Arabia Department of Physics Riphah International UniversityLahorePakistan Department of Physics Faculty of ScienceTaibah UniversityMedinaSaudi Arabia Chemical Engineering Department College of EngineeringKing Saud UniversityRiyadhSaudi Arabia Physics and Astronomy Department College of ScienceKing Saud University RiyadhRiyadhSaudi Arabia

The electronic and thermoelectric properties of alkali metal-based fluorides CsYbF3 and RbYbF3 are studied by using Wien2k and boltzTraP *** structural and thermodynamic stability of these materials are confirmed by tolerance factor(0.94 and 0.99 for RbYbF3 and CsYbF3)and negative formation *** optimized lattice constants and bulk moduli are consistent with the results reported in the *** reported band gap for RbYbF3 is 0.86 eV which decreases to 0.83 eV by the replacement of Cs with *** electrical and thermal conductivities along with Seebeck coefficients decrease with temperature rising from 0 K to 800 *** large values of thermoelectric parameters for positive chemical potentials show that the character is dominated by *** studied materials have figures of merit 0.82 and 0.81 at room temperature respectively,for RbYbF3 and CsYbF3 and increase with temperature ***,the materials under study may have potential application values in thermoelectric generators and refrigerators.

关键词： density functional theory thermodynamic stability electrical conductivity figure of merit

Pretreatment-free Ni-P plating on magnesium alloy at low temperatures

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous metals Society of China 2018年第12期28卷 2478-2488页

作者： P.SHOGHI D.SEIFZADEH m.GHOLIZADEH-GHESHLAGHI A.HAbIbI-YANGJEH Applied Chemistry Department University of Mohaghegh Ardabili

Electrochemically promoted electroless plating(EPEP)was used for the application of pretreatment-free Ni-P coating on Am60b.m.gnesium alloy at low temperatures and the obtained coating was characterized by SEm,AFm,EDS and XRD ***,uniform,and medium-phosphorus Ni-P coating with mixed crystalline-amorphous microstructure was obtained by applying a cathodic current density of4mA/cm^2at50℃.Also,island-like nickel clusters were deposited on the alloy surface under the same plating condition but without applying the cathodic *** addition,the durability of the magnesium alloy against corrosion was strongly improved after plating via EPEP technique which was revealed by electrochemical examinations in3.5%NaCl(mass fraction)corrosive *** results of the electrochemical examinations were confirmed by microscopic ***,microhardness,porosity and adhesive strength of the deposits were also qualified.

关键词： magnesium alloy corrosion low-temperature electroless plating Ni-P coating

Low-cost Remote Rain and Stream Data Acquisition System for mapping of Potential micro-Hydro Sites

在线全文

学校读者我要写书评

暂无评论

Energy and Power Engineering 2013年第4期5卷 56-62页

作者： R. C. Pallugna A. b. Cultura C. m. Gozon N. R. Estoperez mindanao State University - Iligan Institute of Technology mindanao University of Science and Technology

The stream and rain data acquisition system presented in this paper makes the mapping of hydro potentials in the region or of the country economically and practically possible. moreover, it can also serve as a flood w... 详细信息

关键词： Stream Data Acquisition micro-hydro Flood Warning System

SPRAY RETENTION ON GREEN FOXTAIL （SETARIA VIRIDIS） USING AIRbRUSH AND bROADCAST SPRAYERS AND ITS ImPACT ON THE EFFICACY OF A mYCOHERbICIDE AGENT

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

SPRAY RETENTION ON GREEN FOXTAIL （SETARIA VIRIDIS） USING A...

Paleoenvironments and geochemistry across a continuous Permian-Triassic boundary section at bukk mountains,Hungary

The 18th Asian-Pacific Weed Science Society Conference

作者： G.Peng T.m.Wolf K.N.byer b.Caldwell Agriculture and Agri-Food Canada Saskatoon Research Center107 Science PlaceSaskatoonSaskatchewanCanadaS7N 0X2

＜正＞It was previously observed that broadcast spraying of a foliar mycoherbicide agent（94-409A） on green foxtail at volumes ranging from 100 to 800 L/ha did not achieve the same level of control as did airbrush spraying to the point of *** addition,regardless of application method,the youngest and erect top leaf often showed least damage in comparison to older leaves,and plant regrowth often occurred. Several contributing factors may be involved,including lower actual application volumes of the broadcast spray and possible physical effects due to the force of the airbrush *** were conducted to compare the spray retention of different application methods,to examine the retention on different leaves of green foxtail,and to improve the retention efficiency and biocontrol efficacy through selection of nozzle, travel speed,spore concentration,and *** retention using various application methods was determined by measuring a tracer dye（Rhodamine WT） in spray solutions using fluorescence *** biocontrol efficacy,spore suspensions of the fungal agent were applied to the plant foliage at predetermined concentrations and the inoculated plants were given a period of dew prior to being returned to the *** severity and plant fresh weight were measured one week after the treatment as efficacy *** achieve the same retention volume as that of run-off airbrush spray,an application volume around 2,000 L per hectare was required with a Tee-Jet XR-8004 *** retention on the top leaf was similar to that on lower leaves on a leaf dry matter *** broadcast spray providing equivalent retention as airbrush inoculation resulted in comparable control of green foxtail, reducing plant fresh wish by more than 90%when compared to non-treated controls. Droplet size,nozzle angle,and travel speed appear to have variable effects on the spray retention,and subsequently on the efficacy of weed *** the conce

关键词： Spray retention biological control and green foxtail

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Geoscience Frontiers 2021年第3期12卷 214-233页

作者： m.E.brookfield J.C.Williams A.G.Stebbins School for the Environment University of MassachusettsBostonMA 02125USA School of Earth Sciencec The Ohio State UniversityColumbusOH 43210USA

The bálvány North Permian-Triassic boundary sediments were deposited on a carbonate platform in the tropical part of the western Paleo Tethys *** overall elemental geochemistry of the detailed two-metre-thick section across the boundary that we studied shows that the clastic content of the sediments came from dominantly silica-rich continental sources though with some more silica-poor inputs in the uppermost Permian and lowest Triassic limestones as shown by Ni/Al and Nb/Ta *** inputs bracket,but do not coincide with,the main extinctions and associated C,O and S *** aridity at the Permian-Triassic boundary with increased wind abrasion of suitable Ti-bearing heavy minerals accounts for both the high Ti/Al and Ti/Zr *** geochemical redox proxies suggest mainly oxic depositional conditions,with episodes of anoxia,but with little systematic variation across the Permian-Triassic extinction *** lack of consistent element geochemical changes across the Permian-Triassic boundary occur not only in adjacent shallower-water marine sections,and in other marine sections along the SW Tethys margin such as the Salt Range sections in Pakistan,but also in deeper shelf and oceanic sections,and in non-marine African and European continental *** the absence of significant changes in physical environments,chemical changes in the atmosphere and oceans,reflected in various isotopic changes,drove the Permian-Triassic extinctions.

关键词： Permian-Triassic boundary Paleoenvironments geochemistry Hungary bukk

Application of differential scanning calorimetry to study the interpretation on herbal medicinal drugs:a review

在线全文

学校读者我要写书评

暂无评论

TmR Pharmacology Research 2022年第2期2卷 1-7页

作者： Rohan Singadi shankar Gharge Shweta Pote Shailendra S.Suryawanshi meenaxi m.maste Rahul Koli Department of Pharmaceutical Chemistry KLE College of Pharmacy BelagaviKLE Academy of Higher Education and ResearchBelagavi-560010KarnatakaIndia Department of Pharmaceutical Quality Assurance KLE College of Pharmacy BelagaviKLE Academy of Higher Education and ResearchBelagavi-560010KarnatakaIndia.

background:Differential scanning calorimetry as a method of investigating and monitoring the kinetics of herbal medicinal *** instrumental and experimental aspects are ***:A brief survey is made of herbal medicinal plants and results of differential scanning calorimetry studies are reviewed and this discussion is presented the effects of the instrumental conditions like heating rate and the sample conditions like sample particle size,sample mass,sample purity,sample stability in the melting region and property of ***:This study suggests that application of differential scanning calorimetry to study the interpretation on herbal medicinal drugs.

关键词： differential scanning calorimetry medicinal plants thermal analysis

The class A macrophage scavenger receptor type Ⅰ(SR-AI) recognizes complement iC3b and mediates NF-κb activation

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

Protein & Cell 2010年第02期 174-187页

作者： Jason W.K.Goh Yen Seah Tan Alister W.Dodds Kenneth b.m.Reid Jinhua Lu Department of microbiology Yong Loo Lin School of Medicine National University of Singapore mRC Immunochemistry Unit Department of Biochemistry University of Oxford South Parks Road Immunology Programme National University of Singapore

The macrophage scavenger receptor SR-AI binds to host tissue debris to perform clearance and it binds to bacteria for phagocytosis. In addition, SR-AI modulates macrophage activation through cell signaling. However,investigation of SR-AI signaling on macrophages is complicated due to its promiscuous ligand specificity that overlaps with other macrophage receptors. Therefore, we expressed SR-AI on HEK 293T cells to investigate its ligand binding and signaling. On 293T cells, SR-AI could respond to E. coli DH5α, leading to NF-κb activation and IL-8 production. However, this requires E. coli DH5α to be sensitized by fresh serum that is treated with heat-inactivation or complement C3 depletion. Anti-C3 antibody inhibits the binding of SR-AI to serum-sensitized DH5α and blocks DH5α stimulation of SR-AI signaling. Further analysis showed that SR-AI can directly bind to purified iC3b but not C3 or C3b. by mutagenesis, The SRCR domain of SR-AI was found to be essential in SR-AI binding to serum-sensitized DH5α.These results revealed a novel property of SR-AI as a complement receptor for iC3b-opsonized bacteria that can elicit cell signaling.

关键词：