检索结果-南通市图书馆

Chinese Physics B 2022年第8期31卷 675-681页

作者： s sankararaman Department of Optoelectronics University of KeralaTrivandrum695581KeralaIndia

The paper employs the principles of graph theory in nanobiophotonics, where the soot-assisted intra-pigmental energy transport in leaves is unveiled through the laser-induced thermal lens(TL) technique. Nanofluids with different soot concentrations are sprayed over Lablab purpureus(L) sweet leaves, and the extracted pigments are analyzed. The graph features of the constructed complex network from the TL signal of the samples are analyzed to understand their variations with optical absorbance. Besides revealing the presence of optimum soot concentration that can enhance photosynthesis,the study brings out the potential application of graph features in nanobiophotonics.

关键词： nanobiophotonics thermal lens soot pigmental energy transfer graph theory

The History, Role And Future Of The Liverpool Cotton Association

在线全文

学校读者我要写书评

暂无评论

The History, Role And Future Of The Liverpool Cotton Associa...

The current status of nitrogen fertiliser use efficiency and future research directions for the Australian cotton industry

2004’中国棉业发展高峰论坛

作者： Andre W G.macdonald President of The Liverpool Cotton Association

＜正＞Ladies and GentlemenCotton has a long history going back thousands of years, but in giving you a short history of the Liverpool Cotton Associ-ation I will only go back two hundred and fifty years and start with an advertisement in the "Liverpool Chronicle and Ma-rine Gazetteer", June 3rd 1757, which read:"To be sold by auction at the Merchants’ Coffee House, on Thursday the 16th at one o’clock. Twenty-eight bags, of Jamai-ca Cotton, in four lots. samples to be seen with R. Robinson, Broker."This establishes the birth of the Liverpool Cotton Market.

关键词：

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

Journal of Cotton Research 2018年第3期1卷 41-50页

作者： macdonald Ben C.T. LATIMER James O. sCHWENKE Graeme D. NACHIMUTHU Gunasekhar BAIRD Jonathan C. CsIRO Agriculture and Food The Fenner school of Environment and society the Australian National University NsW Department of Primary Industries Tamworth Agricultural Institute NsW Department of Primary Industries Australian Cotton Research Institute

Fifty years of sustained investment in research and development has left the Australian cotton industry well placed to manage nitrogen（N） fertiliser. The average production in the Australian cotton industry today is greater than two tonnes of lint per hectare due to improved plant genetics and crop management. However, this average yield is well below the yield that would be expected from the amount of N fertiliser used. It is clear from the recent studies that across all growing regions, conversion of fertiliser N into lint is not uniformly occurring at application rates greater than 200-240 kg·hm;of N. This indicates that factors other than N availability are limiting yield, and that the observed nitrogen fertiliser use efficiency（NFUE） values may be caused by subsoil constraints such as sodicity and compaction. There is a need to investigate the impact of subsoil constraints on yield and *** in NFUE will be made through improved N fertiliser application timing, better targeting the amount of fertiliser applied for the expected yield, and improved soil N management. There is also a need to improve the ability and confidence of growers to estimate the contribution of soil N mineralisation to the crop N budget. Many Australian studies including data that could theoretically be collated in a meta-analysis suggest relative NFUE values as a function of irrigation technique; however, with the extensive list of uncontrolled variables and few studies using non-furrow irrigation, this would be a poor substitute for a single field-based study directly measuring their efficacies. In irrigated cotton, a re-examination of optimal NFUE is due because of the availability of new varieties and the potential management and long-term soil resilience implications of the continued removal of mineralised soil N suggested by high NFUE values. NFUE critical limits still need to be derived for dryland systems.

关键词： Nitrogen fertiliser Nitrogen use efficiency Dryland Irrigated

Prosecution records reveal pangolin trading networks in China, 2014–2019

在线全文

学校读者我要写书评

暂无评论

Zoological Research 2021年第5期42卷 666-670页

作者： Xiang-Qin Huang Chris Newman Christina D.Buesching Mei-Ling shao Yun-Chun Ye sha Liu David W.macdonald Zhao-Min Zhou Key Laboratory of southwest China Wildlife Resources Conservation(Ministry of Education) China West Normal UniversityNanchongSichuan 637002China Wildlife Conservation Research Unit The Recanati-Kaplan CentreDepartment of ZoologyUniversity of OxfordOxford OX135QLUK Cook’s Lake Farming Forestry and Wildlife Inc.(Ecological Consultancy)Queens CountyNova Scotia B0J 2H0Canada Department of Biology Irving K.Barber Faculty of ScienceThe University of British Columbia/OkanaganKelownaBC V1V 1V7Canada Key Laboratory of Environmental science and Biodiversity Conservation(sichuan Province) China West Normal UniversityNanchongSichuan 637002China

In a precautionary response to the current coronavirus(COVID-19)pandemic,China’s Ministries permanently banned eating and trading in terrestrial wild(non-livestock)animals on 24 February 2020,and extensively updated the list of Fauna under special state Protection(LFssP)in 2020 and 2021,in which pangolins(Manidae spp.)were upgraded to the highest protection *** 509 pangolin prosecution records from China Judgements online prior to these changes(01/01/14–31/12/19),we identified that Guangdong,Guangxi and Yunnan Provinces were hotspots for trade in whole pangolins and their scales.

关键词： trading networks mining

Dynamics of Apparent Horizons in (N+2)-Dimensional space-Times

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2012年第11期29卷 23-26页

作者： s.s.Zade Department of Mathematics J.B.College of ScienceWardhaIndia

We analyze the time of formation of central singularities in(N+2)-dimensional *** is shown that the time of formation of central singularity decreases with the increase in dimensions of the *** dynamics of trapped sur... 详细信息

关键词： singularity dimensions graphical

Thermodynamic Performance and Flammability studies of Hydrocarbon Based Low Global Warming Potential Refrigerant Mixtures

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

Journal of Thermal science 2022年第5期31卷 1487-1502页

作者： Nagarjuna KUMMA s s Harish KRUTHIVENTI Department of Mechanical Engineering Low Temperature LaboratoryNational Institute of TechnologyTiruchirappalliTrichy620015India

This paper presents a theoretical method to calculate the minimum inerting concentration(MIC)of binary and ternary blends(refrigerants)that are used in small refrigeration *** is the concentration of the dilutant which makes the flammable mixture into just non-flammable(at non-zero quenching potential).In this study,the refrigerant safety parameters such as flammability,Global Warming Potential(GWP)and performance(COP)are analyzed for twelve binary and thirteen ternary blends containing one flammable and two nonflammable(dilutant)*** investigation was carried out with the hydrocarbon refrigerants R290,R600,R600a each mixed with dilutants R227ea,R125,R245fa,R13I1 and R134a at different concentrations *** methods,thermal balance method(TBM)and modified thermal balanced method(MTBM),are used to estimate the MIC(which decides the flammable zone).Thirteen ternary blends were identified based on the MIC values estimated using *** the case of ternary blends,it was observed that the non-flammable zone is high for the compositions of the Mixture G,Mixture H and Mixture *** was also estimated that the COPs of the proposed mixtures M22,M24,M25 and M27 are 4%greater than the COP of R134a(for the same operating conditions).Further,it was also understood that the corresponding GWP value is reduced by 90%to 97%for the mixtures(M21,M22,M24,M25 and M27)when compared to R134a(GWP=1300).Therefore,out of the thirteen proposed ternary mixtures(M15 to M27),the mixtures(M21,M22,M24,M25 and M27)are safe in terms of flammability,GWP and possess reasonable COP which can be a potential alternative refrigerant mixture to R134a in small refrigeration systems.

关键词： hydrocarbons minimum inerting concentration ternary Global Warming Potential

Unstable mode of ion-acoustic waves with two temperature q-nonextensive distributed electrons

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第9期30卷 313-319页

作者： s Bukhari Nadeem Hussain s Ali Department of Physics The University of Azad Jammu and KashmirMuzaffarabad 13100Azad KashmirPakistan National Center for Physics at QAU Campus Shahdra Valley RoadIslamabad 44000Pakistan

The linear characteristics of the unstable mode of ion-acoustic waves are examined in an electrostatic electron-ion plasma composed of streaming hot electrons,non-streaming cold electrons and dynamical positive *** plasma under consideration is modeled by using a non-gyrotropic nonextensive q-distribution function in which the free energy source for wave excitation is provided by the relative directed motion of streaming hot electrons with respect to the other plasma *** the frame work of kinetic model,a linearized set of Vlasov-Poisson's equations are solved to obtain the analytical expressions for dispersion relation and Landau damping *** threshold condition for the unstable ion-acoustic wave is derived to assess the stability of the wave in the presence of nonextensive *** in the wave spectrum and nontrivial effects of q-nonextensive parameter on the ion-acoustic waves can be of interest for the readers in the regions of saturns's magnetosphere.

关键词： non-gyrotropic nonextensivity saturns's magnetosphere

structural and magnetic properties of BiFe_(1-x)Cr_xO_3 synthesized samples

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2014年第6期23卷 398-400页

作者： s.s.Arafat Department of Physics College of Science King Faisal University Department of Physics College of Science Fayoum University

Chromium doping effects on the structure and the magnetic properties of bismuth ferrite BiFe1-xCrxO3 （x = 0-0.3）（BFCxO） polycrystalline samples are examined. The Perovskite-type oxide samples are synthesized by the conventional solid state reaction at a high pressure of 7 GPa and a temperature of 1273 K. The X-ray powder diffraction patterns at room temperature show that all the samples with x = 0.0-0.3 are described by the rhombohedral structure. In the meantime, it is revealed that the doping of Cr can induce noticeable lattice distortions in the doping samples, and the largest distortion is observed in the case x = 0.1. The magnetic hysteresis loops measured at room temperature exhibit week ferromagnetic behaviors of the samples and the magnetization is found to increase with the increase in Cr concentration. The temperature- dependent magnetization curves indicate antiferromagnetic features in samples. Moreover, Cr-doping tends to reduce the ordering temperature.

关键词： X-ray diffraction magnetic properties

Hot Forging of Nitrogen Alloyed Duplex stainless steels

在线全文

学校读者我要写书评

暂无评论

Journal of Materials science & Technology 2007年第1期23卷 111-117页

作者： P. Chandramohan s.s.Mohamed Nazirudeen s. s.Ramakrishnan Department of Mechatronics Eng Sri Krishna College of Eng and TechCoimbatore 641008India Dept. of Metallurgy PSG College of TechnologyCoimbatore 641004India Mechanical Eng VLB Janakiammal college of Eng and TechCoimbatore 641004India

Duplex stainless steels are gaining global importance because of the need for a high strength corrosion resistant material. Three compositions of this group were selected with three different nitrogen contents ciz, 0.15 wt pct （alloy 1）, 0.23 wt pct （alloy 2） and 0.32 wt pct （alloy 3）. The steels were melted in a high frequency induction furnace and hot forged to various reductions from 16% to 62%. In this work, the effect of hot forging on the ferrite ***, hardness, yield strength, impact strength and grain orientation （texture） were studied. Fracture analysis on all the forged specimens using sEM reveals that a size reduction of 48% results in maximum ductility and impact strength as well as minimal ferrite content and grain size. Thus the mechanical properties are found to have a direct correlation to ferrite content and grain size. The highest impact strength was observed in specimens with the smallest grain size, which was observed in specimens forged to 48% reduction in size.

关键词： Duplex Austenite Ferrite Forging solutionizing

Bilateral nephrolithiasis and upper tract transitional cell carcinoma in horseshoe kidney

在线全文

学校读者我要写书评

暂无评论

Current Urology 2024年第3期18卷 247-249页

作者： Jacob M.Gaines Eric J.macdonald Arun Rai David Hoenig Arthur smith Zeph Okeke Tareq Aro The smith Institute for Urology Donald and Barbara Zucker School of Medicine at Hofstra/NorthwellLake SuccessNYUSA

Nephroureterectomy is currently the criterion-standard treatment for high-grade upper tract urothelial carcinoma(UTUC).Current guidelines and expert opinions propose some exceptions to this approach based on patient characteristics,disease status,and function of the contralateral *** present a rare case of a patient with horseshoe kidney,bilateral large nephrolithiasis,high-grade UTUC in one moiety,and relative parenchymal thinning of the contralateral *** patient was treated with a percutaneous,minimally invasive,nephron sparing *** patient also had intracollecting system instillations of gemcitabine and *** invasive percutaneous resection of high-grade UTUC is a safe procedure in select *** guidelines may not apply to all patients;unique scenarios with UTUC may require personalized decision-making and treatment at specialized centers.

关键词： Upper tract urothelial cancer Percutaneous resection Horseshoe kidney Nephrolithiasis