检索结果-南通市图书馆

Carbon dioxide enrichment affected flower numbers transiently and increased successful post-pollination development stably but without altering final acorn production in mature pedunculate oak (Quercus robur L.)

引用

Journal of Forestry Research 2024年第4期35卷 1-12页

作者： Ryan McClory Richard h.Ellis Martin Lukac Jo Clark Carolina Mayoral Kris M.hart Andrew R.G.Plackett A.Rob MacKenzie School of Agriculture Policy and DevelopmentUniversity of ReadingAgricultureEarley GateWhiteknights RoadPO Box 237Reading RG66EUUK Faculty of Forestry and Wood Sciences Czech University of Life Sciences PraguePrague 165000Czechia Future Trees Trust Harwell Innovation CentreBuilding 173Curie AvenueHarwellOxford OX110QGUK Birmingham Institute of Forest Research University of BirminghamEdgbastonBirmingham B152TTUK School of Biosciences University of BirminghamEdgbastonBirmingham B152TTUK School of Geography Earth and Environmental SciencesUniversity of BirminghamEdgbastonBirmingham B152TTUK

Acorn production in oak(Quercus spp.)shows considerable inter-annual variation,known as masting,which provides a natural defence against seed predators but a highly-variable supply of acorns for uses such as in commercial tree planting each *** emissions of greenhouse gases have been very widely reported to influence plant growth and seed or fruit size and quantity via the‘fertilisation effect’that leads to enhanced *** examine if acorn production in mature woodland communities will be affected by further increase in CO_(2),the contents of litter traps from a Free Air Carbon Enrichment(FACE)experiment in deciduous woodland in central England were analysed for numbers of flowers and acorns of pedunculate oak(Quercus robur L.)at different stages of development and their predation levels under ambient and elevated CO_(2) ***-annual variation in acorn numbers was considerable and cyclical between 2015 and 2021,with the greatest numbers of mature acorns in 2015,2017 and 2020 but almost none in *** numbers of flowers,enlarged cups,immature acorns,empty acorn cups,and galls in the litter traps also varied amongst years;comparatively high numbers of enlarged cups were recorded in 2018,suggesting *** at this site is a fruit maturation masting species(i.e.,the extent of abortion of pollinated flowers during acorn development affects mature acorn numbers greatly).Raising the atmospheric CO_(2) concentration by 150μL L^(−1),from early 2017,increased the numbers of immature acorns,and all acorn evidence(empty cups+immature acorns+mature acorns)detected in the litter traps compared to ambient controls by 2021,but did not consistently affect the numbers of flowers,enlarged cups,empty cups,or mature *** number of flowers in the elevated CO_(2) plots’litter traps was greater in 2018 than 2017,one year after CO_(2) enrichment began,whereas numbers declined in ambient *** with CO_(2) also increased the number o

关键词： Quercus robur L. Acorns Masting Pedunculate oak Carbon dioxide

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Liquid-liquid extraction and separation of total rare earth(RE) metals from polymetallic manganese nodule leaching solution

引用

Journal of Rare Earths 2015年第2期33卷 207-213页

作者： P.K.Parhi K.h.park C.W.Nam J.T.park Mineral Resources Research Division Korea Institute of Geoscience & Mineral Resources (KIGAM)Daejeon 305-350 Republic of Korea School of Applied Science and Center of Industrial Technology KIIT UniversityBhubaneswar 751024 Odisha India

The study on the solvent extraction for quantitative and selective separation of total rare earth metals from the polymetallic nodule leach liquor was investigated. The typical leach liquor bearing 0. 094 g/L total rare earth, 0. 23 g/L Mn, 0.697 g/L Cu, 0.2 g/L Fe, 0.01 g/L Co and 0.735 g/L Ni was subjected to the removal iron content by precipitation method using Ca（Oh）2 at ph 3.95, prior to solvent extraction of rare earth metals. Three different organo-phosphoric acid reagents（D2EhPA, PC88 A, Cyanex 272） were used to ascertain their performances and selectivity towards the loading of rare earth metals in presence of other base metals. Based on the results of eq. ph effect, the performances of above three extractants followed the order as： D2EhPA〉PC88A〉Cyanex 272. To ensure the absence of extraction of base metals（Cu, Co, Ni）, the eq. ph of the solution was optimized at the level of 2.21, though higher rare earth metal extraction efficiency was observed at higher eq. ph with either of the extractants. The complete process flow diagram for substantial recovery of total rare earth was developed using D2 EhPA. Extraction isotherm plot was constructed at A：O=12：1, 3-stages and phe=2.21, using 0.8 mol/L D2 EhPA and the predicted condition of this study was further confirmed by 6-Cycles Counter Current Simulation（CCS） study. The stripping of total rare earth from loaded organic phase（LO） was conducted using hCl solution. Mc-Cabe Thiele diagram study carried out at A：O=1：5 using 4 mol/L hCl showed that three theoretical stages were needed for quantitative stripping of total rare earth. The subsequent stripped solution resulted thus led to contain total rare earth of 5.6 g/L indicating a very high enrichment of total metals by solvent extraction（SX） process.

关键词： total rare earth (RE) metals SX D2EhPA hCl deep sea nodule

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A simulation-based method to investigate occupant-centric controls

引用

Building Simulation 2021年第4期14卷 1017-1030页

作者： Mohamed M.Ouf June Young park h.Burak Gunay Department of Building Civil and Environmental EngineeringConcordia University1515Rue Sainte-Catherine O.MontrealQCH3G 1MCanada Department of Civil Engineering The University of Texas at ArlingtonArlingtonTX76019USA Department of Civil Engineering Carleton University1125 Colonel By DriveOttawaONK1S 5B6Canada

Occupant-centric control (OCC) strategies rely on different algorithms to learn and predict occupants’ patterns and preferences, then utilize these predictions to optimize building operations. however, testing different OCC algorithms or fine-tuning their configurations in real buildings can be a lengthy process. To this end, we present a framework for testing OCCs in a simulation environment prior to field implementation. The proposed workflow entails using synthetic occupant behaviour models and simulating OCC strategies to learn their preferences. The goal is to enable quick comparison of different OCC configurations under various scenarios by modifying occupant behaviour assumptions, as well as climate and design parameters. For proof-of-concept, the proposed method was applied in a case-study to simulate OCCs for lighting and heating/cooling setpoint adjustments in a single office under various occupant types, as well as OCC settings and design configurations. Results demonstrated the benefits of the proposed framework and its potential for providing a more holistic evaluation of OCCs under different scenarios. Using the proposed framework, building designers and operators can identify potential issues with OCCs and fine-tune their settings prior to field implementation.

关键词： occupant-centric controls building simulations energy efficiency comfort building operations lighting hVAC controls

来源：

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

Enhanced thermoelectric performance of spark plasma sintered p-type Ca_(3-x)Y_(x)Co_(4)O_(9+δ)systems

引用

Journal of Materials Science & Technology 2020年第20期52卷 212-222页

作者： J.S.Cha D.h.Kim h.Y.hong K.park Faculty of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul05006Republic of Korea

highly textured dense Ca3-xYxCo4 O9+δ(0≤x≤0.3)samples were fabricated by combining sol-gel process with spark plasma sintering(SPS).Y^3+substitution for Ca^2+simultaneously increased the Seebeck coefficient and reduced the thermal *** latter was attributed to the increase in lattice anharmonicity,structural distortion,and grain boundary area,which enhanced the phonon ***2.7Y0.3Co4 O9+δshowed the largest dimensionless figure-of-merit(ZT=0.194)at 1073 K because it had the largest Seebeck coefficient and the lowest thermal *** ZT value was 55%larger than that of undoped Ca3 Co4 O9(0.125 at 1073 K).Therefore,Y^3+substitution,sol-gel powder synthesis,and SPS are highly effective for enhancing the thermoelectric prope rties of Ca_(3)Co_(4)O_(9).

关键词： Electrical conductivity Ca_(3)Co_(4)O_(9) Thermoelectric properties Seebeck coefficient Thermal conductivity Spark plasma sintering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Event-triggered bipartite consensus over cooperation-competition networks under DoS attacks

引用

Science China(Technological Sciences) 2021年第1期64卷 157-168页

作者： hU Aihua park J h CAO JinDe hU ManFeng LUO YiPing School of Science Jiangnan UniversityWuxi 214122China Department of Electrical Engineering Yeungnam UniversityKyongsan 38541Korea School of Mathematics Southeast UniversityNanjing 210096China College of Electrical and Information Engineering Hunan Institute of EngineeringXiangtan 411104China

This paper addresses the bipartite consensus over cooperation-competition networks affected by denial-of-service(DoS) *** that a network consists of multiple interactive agents, and the relationship between neighboring agents is cooperative or competitive. Meanwhile, information transmission among the agents is unavailable during the intervals of attacks. In order to save communication resources and exclude the Zeno behavior, an event-triggered scheme depending on the sampled-data information from neighboring agents is proposed, and efficient defense strategies in response to the attacks are put *** that the frequency and duration of DoS attacks meet certain requirements, then according to the signed graph theory,the La Salle’s invariance principle, and the convergence of monotone sequences, the results of bipartite consensus via the eventtriggered protocol are provided, which are mainly related to the communication topology of the network, the sampling period,and the threshold parameters in the event-triggered scheme. It is shown that the bipartite consensus is realized even though the DoS attacks take place frequently. Furthermore, this paper discusses the bipartite consensus in the presence of DoS attacks with a random unsuccessful rate. Finally, numerical simulations illustrate the theoretical results.

关键词： bipartite consensus denial-of-service(DoS)attack event-triggered scheme structural balance multiagent system

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

胸部CT肺亚实性结节的计算机辅助检测：基于深度学习减少CT扫描层厚可提高检出率

引用

国际医学放射学杂志 2021年第3期44卷 361-362页

作者： S.park S.M.Lee W.Kim h.park K.h.Jung K.h.Do 俞翔

摘要目前尚缺乏关于计算机辅助检测(CAD)肺亚实性结节(SSN)的最优化的CT层厚的研究。目的在对亚实性结节的检测中,评估CT扫描层厚对CAD效率的影响,并探讨

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Radant透镜:替代昂贵的相控阵天线

引用

系统工程与电子技术 1982年第10期 32-36页

作者： Richard h.park ,都世民

《微波杂志》1981年2月号曾介绍过Radant扫描透镜。那篇文章阐述了这种透镜的基本工作原理,并指出采用Radant透镜的一些优点(相对于通常相控阵天线)。本文介绍Radant透镜的基本技术在各种型式

关键词：透镜面扫描自动寻的 Radant 二极管移相器相控阵天线

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

计算机辅助诊断在肺癌CT筛查中Lung-RADS分类的应用：对阅片者间一致性的影响

引用

国际医学放射学杂志 2022年第2期 245-246页

作者： S.park h.park S.M.Lee Y.Ahn W.Kim K.Jung 刘昶

摘要目的评估计算机辅助诊断（CAD）在肺部影像报告与数据系统（Lung-RADS）分类中对阅片者之间一致性的影响。方法从国家肺癌筛查试验中随机抽取了200例涵盖

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Positive regulation of cell proliferation by the miR-1290-EhhADh axis in hepatocellular carcinoma

引用

Cancer Communications 2024年第6期44卷 705-709页

作者： Jinkwon Lee Gyeonghwa Kim Tae-Su han Eunsun Jung Taesang Son Kwangho Kim Kiyoon Kwon Yuna Roh Tae Young Ryu In hwan Tae Yunsang Kang Byungheon Lee Yu Rim Lee Soo Young park Won Young Tak Dae-Soo Kim Mi-Young Son Keun hur hyun-Soo Cho Stem Cell Convergence Research Center Korea Research Institute of Bioscience and BiotechnologyDaejeonRepublic of Korea Department of Bioscience Korea University of Science and TechnologyDaejeonRepublic of Korea Department of Biochemistry and Cell Biology School of MedicineKyungpook National UniversityDaeguRepublic of Korea Department of Biological Science Sungkyunkwan UniversitySuwonRepublic of Korea Department of Internal Medicine School of MedicineKyungpook National University HospitalDaeguRepublic of Korea Department of Biomedical Convergence Science and Technology School of ConvergenceKyungpook National UniversityDaeguRepublic of Korea

hepatocellular carcinoma(hCC)is the second most common cancer and the third leading cause of cancer-related death worldwide[1].Recently,hCC incidence and mortality rates have further increased due to changes in the global social environment and dietary habits[2].hCC is treated by surgical resection or combination chemotherapy,but the overall survival rate of hCC patients has not improved,and the recurrence rate is still high due to strong invasiveness and resistance to chemotherapy[3].

关键词： chemotherapy mortality cancer

来源：

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

The h_∞ synchronization of nonlinear Bloch systems via dynamic feedback control approach

引用

Chinese Physics B 2011年第7期20卷 101-106页

作者： D.h. Ji J.h. Koo S.C. Won Ju h. park Mobile Communication Division Digital Media and Communications Samsung Electronics Co. Ltd 416-2 Maetan-Dong Suwon 443-803 Republic of Korea Department of Electronic and Electrical Engineering Pohang University of Science and Technology San 31 Hyoja-Dong Pohang 790-784 Republic of Korea Department of Electrical Engineering Yeungnam University 214-1 Dae-Dong Kyongsan 712-749 Republic of Korea

We consider an h∞ synchronization problem in nonlinear Bloch systems. Based on Lyapunov stability theory and linear matrix inequality formulation, a dynamic feedback controller is designed to guarantee asymptotic stability of the master-slave synchronization. Moreover, this controller reduces the effect of an external disturbance to the h∞ norm constraint. A numerical example is given to validate the proposed synchronization scheme.

关键词： h∞ synchronization Bloch system dynamic control linear matrix inequality

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：