Results 31 to 40 of about 11,061 (194)

有机抗旱剂BGA对大叶黄杨生长及耗水特性的影响

open access: yesShuitu Baochi Xuebao, 2006
为了探索新型有机抗旱剂BGA(Beijing Angle Green)对生长于不同光温环境下的大叶黄杨(Euonymus japnicus)生长和耗水特性的影响,进行了温室内、外小区和盆栽试验。结果显示:不论施用BGA与否,生长于温室外的大叶黄杨生物量和耗水强度较大,生长于温室内的大叶黄杨生物量和耗水强度较小;温室外大叶黄杨的生物量随BGA用量的增加而增加,耗水强度先减小,后增加;温室内大叶黄杨的生物量随BGA用量的增加先增加,后减小,耗水强度线性减少;没有施用BGA时,温室内外大叶黄杨的WUE相近 ...
王勇, 杨培岭, 任树梅
doaj  

Cold water anomalies in the middle layer of the northern Taiwan Strait in spring:a numerical approach [PDF]

open access: yes, 2017
台湾海峡位于福建和台湾之间,为一狭长水道,在南海和东海水体交换过程中起着重要作用。海峡内部的水团成分多样,海流情况多变,对沿岸生态,经济等方面具有十分重要的影响。2015年国家基金春季台湾海峡共享航次在海峡北部观测到了中层冷水的现象,在观测断面的中层水体表现为较表层及底层低的温度。本文通过基于ROMS的台湾海峡业务化预报系统(TFOR)模拟台湾海峡及周边的水文状况,并采用热通量校正的方法对模式的温度模拟进行同化,使其模拟的温度更加符合实际观测值,之后将其结果应用于春季台湾海峡北部中层冷水异常的研究 ...
傅军
core  

Cobalt‐Based Metal Hybrid Encapsulated Micro‐Aluminum for Tailoring Combustion in Composite Solid Propellants

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT To address the issues of aluminum (Al) powder agglomeration during combustion and low oxidizer decomposition efficiency in composite solid propellants, this study utilized in situ self‐assembly technology to prepare cobalt‐based hybrid‐coated modified Al powder (Al@CZ).
Chong Chen   +11 more
wiley   +1 more source

Changes and regularities of organic matter mineral pore in fine-grained sedimentary rocks during temperature rise: A case study of fine-grained sedimentary rocks in kong 2 member of Cangdong sag(细粒沉积岩有机质-矿物-孔隙在升温过程中的变化及其规律)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2023
在埋藏过程中,随着埋深的增加,细粒沉积岩的矿物组成、有机质形态、孔隙类型与质量分数等会发生一系列变化。为揭示其变化规律,对有机质热模拟的残样进行了扫描电镜、全岩X射线衍射、镜质体反射率(Ro)、岩石热解、有机碳质量分数等测试。发现在从室温(25 ℃)到550 ℃的升温过程中,有机质形态由团块状向条带状、团块状变化;黏土矿物由层片状逐渐向絮状转化;碳酸盐矿物溶蚀加剧,温度超过500 ℃后,出现溶蚀-沉淀现象;随着温度的升高,由有机质热演化产生的有机质孔的面积不断增加,在450~475 ℃时 ...
尹玲芝(YIN Lingzhi)   +4 more
doaj   +1 more source

Climate response projection of tropical Pacific and China marginal seas to global warming by dynamical downscaling [PDF]

open access: yes, 2017
IPCC第五次评估报告指出,自20世纪中叶以来,气候系统的变暖是毋庸置疑的。海洋调节着影响大气运动的热源和水汽源,在气候的形成和变化中发挥着重要作用。全球变暖背景下,温室气体浓度的增加在空间上近似均匀,但是不同区域对全球变暖的气候响应有所不同,海洋气候呈现出全球平均变化状态的同时,区域海洋也呈现出各自不同的变化型态。对热带太平洋和中国近海气候变化的预估有助于增进对全球气候变化的理解,有助于更全面地评估未来气候变化对全球和我国带来的一系列影响。目前对热带太平洋和我国近海海洋气候变化预估的研究相对较少 ...
何越
core  

Manipulating Terminal Bonds of Ti3C2Tx MXene for Highly Efficient Microwave Absorption and Photothermal Conversion

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT MXenes have been widely investigated as microwave absorption (MA) materials because of their unique properties. This study introduces a terminal bond manipulation strategy to enhance charge transfer and polarization in Ti3C2Tx, optimizing its MA performance.
Xiang Fang   +8 more
wiley   +1 more source

压敏电阻冲击老化过程中温度对静态参数影响分析

open access: yesDianci bileiqi, 2015
研究了冲击老化过程中温度对压敏电压和泄漏电流的影响。研究表明,压敏电压呈现弱的负温度特性。随着冲击次数增加,压敏电压与温度的相关性有增强趋势,而且压敏电压随温度变化的波动变得明显。泄漏电流受温度影响较大。随着温度上升,泄漏电流呈指数函数上升,具有较强的正温度特性,且随着冲击次数增加,正温度特性越强。
曹洪亮   +4 more
doaj  

Satellite observation of the temporal and spatial variations of sea surface diurnal warming and the mechanism in the South China Sea [PDF]

open access: yes, 2013
海表面日增温(Seasurfacediurnalwarming)是对海表温度(SeaSurfaceTemperature,SST)白天比晚上高的日变动现象的一种量度,通常可近似地用遥感SST的昼夜温差来表示。海表面日增温不仅是准确估算海-气热量和水汽交换的重要参数,而且是海洋动力过程、营养盐、生物种群分布变化的重要影响因子。随着多平台遥感技术、模型等的发展,SST日变动的时空分布规律逐渐为学界所认识。基于多传感器反演算法等的差异造成海表面日增温的差异,且区域性日增温的时空分布仍未细致分析 ...
林锐
core  

Construction of CoP/Mn2P Heterojunctions via One‐Step Phosphorization Coupled With Hollow Hard Carbon Spheres as Supports: Enabling Ultrastable Long‐Cycle Sodium‐Ion Anodes Over a Wide Temperature Range

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Driven by global energy transition and sustainability, sodium‐ion batteries (SIBs) have emerged as key alternatives to lithium‐ion batteries for low‐to‐medium energy storage, because of abundant sodium resources and low cost. However, their commercialization is hindered by the lack of anodes with high capacity, fast kinetics, and long‐term ...
Shuang‐Lin Cai   +13 more
wiley   +1 more source

Satellite observation of the temporal and spatial variation of sea surface diurnal warming in the South China Sea [PDF]

open access: yes, 2014
利用搭载在AQuA和TErrA卫星上的MOdIS(MOdErATE rESOluTIOn IMAgIng SPECTrOrAdIOMETEr)、AMSr-E(AdVAnCEd MICrOWAVE SCAnnIng rAdIOMETEr fOr THE EArTH ObSErVIng SySTEM)传感器测量反演的昼夜海表温度(SST),计算海表面日增温(SEA SurfACE dIurnAl WArMIng),分析南海海表面日增温的短期和年变动特征。受观测平台过境时间、传感器测量SST方式 ...
张彩云, 李炎, 林锐
core  

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