Results 11 to 20 of about 16,978 (167)
Shuitu Baochi Xuebao, 2023 为探究不同生育时期土壤干旱对不同抗旱性小麦品种光合生理特性和产量的影响,以抗旱性弱品种"新春22号(XC22)"和抗旱性强品种"新春6号(XC6)"为试验材料,在土柱栽培和大田条件下,分别设置常规灌溉(CK)、分蘖期轻度干旱(W1)、分蘖期中度干旱(W2)、拔节期轻度干旱(M1)和拔节期中度干旱(M2)5种处理,研究小麦叶片叶面积指数(LAI)、叶绿素含量、气体交换参数和叶绿素荧光参数及地上部干物质积累、穗重与产量的变化。结果表明:抗旱性弱品种"XC22"受水分胁迫影响更大,复水后恢复能力较弱 ...
尹豪杰 +8 more
doaj
Rare Metals, EarlyView.ABSTRACT Porous NiTi alloys are widely used in biomedical and engineering fields. Using the PBF‐LB technique, the TPMS and Voronoi porous parts with a porosity of ∼67% and a minimum feature size of 0.15 ± 0.02 mm were fabricated. Although the bulk sample fabricated with the same parameters is defect‐free, μ‐CT reconstruction on the porous sample ...
Wen‐Hao Zeng +7 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Regulating negative parameters of metacomposites is mainly limited by their unclear mechanisms, which affects their practical applications in new sensing, communication, electromagnetic (EM) protection and other fields. This work proposes a dual‐functional competitive design strategy based on the waste corncob‐derived carbon/polyaniline ...
Qiuyun Yang +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2003 在分析土壤水分特征曲线经验模型中特征参数的基础上，选取5种不同质地土壤，利用张力计测定了土壤水分特征曲线，根据实验资料确定了土壤水分特征曲线经验模型中参数，采用回归分析方法建立了参数与土壤物理特性间的函数关系，为采用土壤颗粒组成等土壤物理特性确定土壤水分特征曲线提供了指导。
来剑斌 王全九
doaj +2 more sources
Study on the Mechanism of Discharge Channel and Thermal Effect in Micro-EDM [PDF]
, 2015 为了提高微细电火花加工的工件表面精度、控制加工过程的放电参数以及预测放电加工的结果，本文从微细电火花加工的基本机理出发，针对微细电火花加工过程中存在的研究难点进行了探索，并从介质击穿、通道扩张、能量分配以及热作用等几个方面开展了研究。主要研究工作如下： 首先，研究了微细电火花等离子体通道击穿机理及模型。从微细电火花加工的放电特性出发，提出了适用于微细电火花加工且结合了气泡机理与电子机理的击穿机理，并基于该击穿机理建立适用于微细电火花加工过程的击穿模型。 其次，研究了微细电火花等离子体通道扩张机理及模型 ...
朱凯
core
Thermal deformation analysis of copper-steel composite staves [PDF]
, 2016 The improvement in thermal deformation resistance of the copper stave in the bosh area and lower stack area of a blast furnace is the key factor for prolonging the blast furnace campaign life.
CHENG Shu-sen +4 more
core +1 more source
Interface Issues of Inorganic Solid‐State Electrolytes in Secondary Magnesium Batteries
Rare Metals, EarlyView.ABSTRACT Solid‐state magnesium batteries (SSMBs) have gained significant attention as promising candidates for next‐generation safe energy storage systems because of the abundance of magnesium (Mg) in the earth's crust, superior energy density, and inherent nonflammability.
Jiren Wang +9 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2015 为了更好地控制造纸废水循环中的溶解和胶体物质（Dissolved and Colloidal Substance，简称DCS），通过碎浆和抄片实验模拟造纸生产环节，探究了废水循环次数与DCS各特征参数以及纸张性能参数之间的关系.实验结果表明：DCS微粒的粒径主要分布在100~200 nm；随着循环次数的增加，DCS的Zeta电位（绝对值）逐渐减小，且主要由CS贡献；DCS的阳离子需求量主要由DS贡献，DCS和DS的阳离子需求量随着循环次数的增多不断增大；DS是DCS电导率的主要来源 ...
HEYuefeng(何月峰) +5 more
doaj +1 more source
Devices of Graphene Synthesized by Laser Chemical Vapor Deposition and Research on the Key Technologies [PDF]
, 2015 基于石墨烯优异的电子、机械、热学、光学性能以及广阔的应用前景，自2004年被发现以来迅速成为材料学与物理学领域的研究热门。目前，制备石墨烯的方法有很多，但是如何实现石墨烯的快速生长、生长区域的可控性、微区生长以及非转移生长一直是石墨烯在电子器件上应用必须解决的问题。通过对石墨烯多种制备方法的比较，我们发现激光化学气相沉积法（LaserChemicalVaporDeposition,LCVD）是最有可能实现这一要求的方法，本文也将采用该方法进行石墨烯的制备 ...
陈永庆
core
Rare Metals, EarlyView.ABSTRACT Recently, cobalt/nitrogen co‐doped materials have emerged as heterogeneous catalysts to activate peroxymonosulfate (PMS) and have been applied to advanced oxidation processes for environmental remediation. However, their recyclability and reusability remain major barriers to practical application.
Wen‐Kai Zhu +11 more
wiley +1 more source