Results 31 to 40 of about 1,103,686 (145)
Time‐Efficient Columnar‐to‐Equiaxed Transition via High Magnetic Field Processing
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT The need to simplify processing routes and improve processing efficiency motivates the development of time‐efficient methods for inducing the columnar‐to‐equiaxed transition (CET) during solidification while tailoring material performance. Conventional multistep CET approaches are time‐consuming and often struggle to simultaneously regulate ...
Chendong Zhao +12 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2019 局部火灾下,网架结构升温具有明显的非均匀性,结构中温度高的杆件热膨胀受到温度较低杆件的约束,使得网架结构的部分杆件具有显著的约束杆件高温力学特征。基于局部火灾下网架结构力学反应全过程数值追踪技术,考察结构升温非均匀性、结构荷载比、火源位置和结构跨度影响因素下,网架结构杆件高温屈曲后强度对整体结构抗火极限承载力的贡献。研究表明:当结构温度分布非均匀系数η在0.2≤η0.5时,杆件高温屈曲后强度对结构抗火极限承载力的贡献先逐渐减小然后转变为逐渐增大。上述研究结论可为建立网架结构第2阶段失效准则提供理论依据。
彭竟展, 杜咏, 王惠蕾
doaj
Anatomical study on the chalkiness formation of early indica rice(早籼垩白米形成的形态解剖学的研究)
Zhejiang Daxue xuebao. Lixue ban, 2002 以浙733(多垩白)和中优早5号(少垩白)两个品种为实验材料,利用人工气候箱控温手段,在植株开花后4天分别移入高(37℃)、中(30℃)、低温(24℃)的人工气候箱控温栽培.采用Spurr树脂半薄切片的方法对垩白部位的细胞结构和淀粉粒整体形态进行观察研究.实验结果表明,温度越高,腹背径向的细胞越扁,细胞数目越多,越易导致垩白的发生;不同温度处理下中优早5号的淀粉粒大多为多角形,但温度越高,淀粉粒排列越疏松,且大小不均一;低温处理下浙733的淀粉粒大多为多角形,排列较为紧密,但大小不均一,中 ...
JIANGWei-mei(姜维梅) +2 more
doaj +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT In laser‐directed energy deposition (LDED) of TiC/Ti6Al4V composites, a low content of micron‐sized TiC provides a good strengthening effect on hardness and strength, but the improvement in plasticity remains a challenge. By introducing synchronous ultrasonic impact treatment (UIT) into the LDED process, an ultrasonic‐assisted LDED (UA‐LDED ...
Yuzhou Zeng +9 more
wiley +1 more source
Insights Into the Temperature‐Dependent Oxidation Mechanism of Metallic Cerium in H2O‐N2 Atmospheres
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Metallic cerium (Ce), a widely used surrogate for actinide metals, enables mechanistic studies of reactions in complex gas environments under controlled and safer laboratory conditions. Here, the oxidation behavior of Ce in H2O‐N2 mixed atmospheres was investigated from 200°C to 350°C using in situ thermogravimetry–mass spectrometry, in situ X‐
Kun Huang +10 more
wiley +1 more source
Gongye shui chuli, 2021 针对常规超滤膜组件在高温凝结水处理过程中存在的耐温性差的问题，研究采用热致相分离（TIPS）法制备的PVDF超滤膜组件对高温凝结水进行处理。结果表明：在运行温度高达90℃，进水浊度为30~350 NTU，运行通量为35 L/（m2·h）的条件下，该膜组件可实现低压稳定运行；出水水质稳定，产水浊度≤0.1 NTU，SDI15（淤泥密度指数）≤5，可有效去除原水中的悬浮物和胶体，满足后续工艺要求；该膜组件经过碱洗和酸洗后，膜通量恢复性能良好，恢复率可达98%。
何柳东, 胡砚平, 林亚凯, 陈茗
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野生动物学报, 2016 为研究夏季高温环境是否对小熊猫的生理机能产生影响,在2013年6～8月期间对小熊猫的体温和心率于上、下午进行测量,体重约隔15 d空腹进行称量,并于高温开始前后采血测定生化指标碱性磷酸酶(AKP)、磷酸激酶(CK)、谷丙转氨酶(ALT)、谷草转氨酶(AST)。结果表明:6月与7、8月间的温度存在显著差异,因而6月与7、8月可认为是夏天高温开始前、后的阶段。小熊猫个体间的体温存在差异,不同月份间的体温、心率不存在显著差异,随着环境温度升高小熊猫的体温、心率未随之有显著变化,体重也未明显减轻 ...
汪丽芬 俞红燕 朱 岩 孙伟明
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Alkali metal (Li, Na, and K) batteries (AMBs) have attracted widespread attention in recent years because of their high theoretical specific capacity and attractive energy density. However, they still suffer from uncontrollable dendrite growth and sluggish conductivity during cycling, which lead to security issues and inferior cycling ...
Yong Liu +11 more
wiley +1 more source
Dianci bileiqi, 2021 因生产中使用的灰蓝釉配方均采用锆系釉,具有高温粘度大,烧成温度高的特点;而坯料烧成温度低,产品烧成温度不能太高,造成灰蓝釉产品因烧成温度低而出现窑后流痕、缩釉,桔釉、表面不平整等现象,影响产品的外观。所以,需研制与坯料烧成温度匹配的低温电瓷灰蓝釉配方。
杨娟
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The design and synthesis of highly efficient electrochemical sensors are pivotal to electrochemical conversion technologies. This study successfully synthesized a composite material comprising two‐dimensional (2D) conductive MXene and nickel‐based metal–organic framework (Ni‐MOF) by stirring at room temperature.
Hai‐Xia Wu +8 more
wiley +1 more source