Results 21 to 30 of about 1,575,255 (163)
International Journal of Applied Linguistics, EarlyView.ABSTRACT Grounded in social cognitive theory, this study investigated how high‐evidence factors jointly contribute to Chinese‐as‐a‐foreign‐language (CFL) speaking self‐efficacy. Data from 236 CFL learners in Beijing revealed a multifaceted pattern of associations.
Peijian Paul Sun +3 more
wiley +1 more source
Risk, Hazards &Crisis in Public Policy, Volume 17, Issue 4, December 2026.ABSTRACT Public communication campaigns on environmental issues rely on economic and ecological arguments, assuming that the recognition of messages is sufficient to produce adjustments in practices. Drought constitutes a specific case of this problem, as a creeping crisis: a slow‐onset hazard whose effects remain weakly visible in everyday life.
Sébastien Rouquette, Inès Bellahcene
wiley +1 more source
镁、钾营养及其交互作用对水稻产量、产量构成因素和养分吸收的影响
Shuitu Baochi Xuebao, 2008 在温室条件下,采用土壤盆栽方法研究了Mg,K营养及其交互作用对水稻(Oryza sativa L.)产量、产量构成因素和养分吸收的影响。结果表明,不同Mg,K施用量均显著地影响水稻籽粒产量及其构成因素,而且Mg,K营养之间存在显著的互作效应。适量施用Mg,K肥就能显著地增加水稻产量,中Mg高K施用量的产量最高,比不施肥增产28.4%。当土壤在低K施用量时,有利于水稻植株对Mg,N和P的吸收;但在高K施用量下,则抑制Mg,N和P的吸收。在低K和中K施用量时,低量Mg能促进N,P.K的吸收 ...
丁玉川, 罗伟, 徐国华
doaj
Jianzhu Gangjiegou Jinzhan, 2023 考虑施工工艺后，空间结构相对一次成型通常会产生附加内力。如何选用较优的施工方案，减少附加应力对结构安全的影响，是施工单位比较关注的问题。以某电教中心周边支承网架结构为例，选用常用施工工艺，进行设计-施工一体化分析，研究其杆件附加应力分布和结构安全性。结果表明，附加应力产生的主要原因是施工过程中支座约束时受力状态与一次成型有较大区别，当与一次成型接近时，杆件的附加应力较小。随着措施量的增加，各施工工艺的换杆数量逐渐递减。在分块吊装或提升工艺下，分块的数量对网架结构服役阶段位移影响较小；在滑移施工工艺下 ...
崔嘉慧 +5 more
doaj
, 2018 当前中国经济处于由依靠要素驱动向依靠创新驱动过渡的新旧动能转换时期,对产业转型升级提出了更高要求。梳理产业演化影响因素的经典研究,以汽车产业演化史为案例,根据产业演化路径及其运行机理,构建技术推动、需求拉动以及中介驱动三个层面的分析框架,从汽车产业演化动力机制转化的不同周期匹配中获得数据,通过交叉分析和比较分析,总结出影响产业演化的关键因素,探讨不同影响因素间的特点及其逻辑关系,最终形成产业演化的动力模型。产业演化是由三个相对独立结构组成的生态动力系统。前端结构的动力源是创新人才,引发产业变革 ...
孙显斌, 焦郑珊, 杨阳
core +1 more source
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Electrocatalytic CO2 reduction reaction (CO2RR) represents a pivotal pathway for the promotion of carbon neutrality and the preparation of highly valuable chemicals. To improve the product selectivity and catalytic efficiency of CO2RR, single‐atom catalysts (SACs) offering highly efficient atomic utilization rates and adjustable electronic ...
Xiaorui Liu +7 more
wiley +1 more source
Gaoya dianqi, 1958 1959年国家要求发电设备的生产比1958年猛增十倍多,同时要求掌握330千伏級的高电气設备的制造技术。要完成这样的艰巨的任务不是一般的計划、措施所能保证的,必须解放思想,打破迷信,发动群众研究新结构,研究新工艺,独創新办法,利用土办法大干巧干才行。 产品是我們生产的对象,一切生产活动是为完成产品品种和数量,提高产品质量和降低成本而进行的。所以产品发展方向和产品结构型式是生产厂的一个根本性的问题。
楼家法
doaj
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT In this study, we developed a novel photothermal fluidized bed (PTFB) for the fabrication of Pd‐CeO2‐TiO2 nanoparticles modified on 13X molecular sieves (PCT@13X). 13X powder impregnated with hydroxides and H2O2 was used as the precursor for PTFB preparation.
Liangzhuan Wu +7 more
wiley +1 more source
Dianci bileiqi, 1984 在电瓷生产中,成形设备是很重要的,它直接影响到产品质量和生产效率.对棒形、套管产品尤为明显.因此随着棒形、套管类产品品种不断发展,相应对成形设备提出了不同要求.本文主要对棒形、套管仿形成形机结构设计概况作简要介绍 ...
陈嘉明
doaj
First, He Was Adam, and Then, She Was Eve
Sexuality, Gender &Policy, Volume 9, Issue 4, November 2026.ABSTRACT Trans* is an umbrella term that is used to describe people who identify with a gender that is different from their assigned sex at birth. There has been a marked increase in young people presenting to child and adolescent mental health services due to a lack of specialist gender clinics in the United Kingdom.
Corey Hartley +2 more
wiley +1 more source