Results 51 to 60 of about 1,240,284 (143)

Superstrong and Tough Biomimetic Lignin‐Based Hydrogel Enabled by Self‐Diffusion Driven Strategy for Self‐Powered Human Dynamic Healthcare Monitoring

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Biomass‐based hydrogels are widely regarded as ideal substrates for self‐powered wearable sensors. However, the practical applications of hydrogels are commonly limited by their inherent low strength and toughness, which restrict their capacity to withstand repeated stretching, bending and other mechanical loads arising from human motion in ...
Boyu Du   +9 more
wiley   +1 more source

血清白蛋白电子顺磁共振波谱诊断直结肠癌

open access: yesZhongguo shiyan zhenduanxue, 2014
直结肠癌是世界第二大癌症,致死率也位居第二位。临床分期往往决定了直结肠癌患者的预后,早期阶段确诊的患者往往预后良好[1]。电子顺磁共振谱仪(EPR)可以测定血浆蛋白的功能特性,以HSA为例,采用具有稳定自由基结构(如氮氧自由基,doxyl)的长链脂肪酸作为人工引入的自由基,然后与血清白蛋白结合 ...
刘忠超   +4 more
doaj  

Manipulating RE‐O Bonds Engineered Thermal/Oxygen Transport Characteristics of Monoclinic‐Prime RETaO4 High‐Entropy Ceramics

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Multifunctional thermal protective ceramic thermal/environmental barrier coatings (T/EBCs) are of great significance for applications of various high‐temperature components, and we propose an effective strategy for designing high‐entropy ceramics (HECs) as T/EBCs for SiC ceramic matrix composites (CMCs), where low thermal expansion ...
Qinshuo Wang   +7 more
wiley   +1 more source

形上學的自由─謝林《自由論文》對海德格「自由」概念的影響

open access: yes, 2010
[[abstract]]本文主要在探討謝林的《自由論文》對海德格「自由」概念的影響。正如同謝林一樣,晚期的海德格視「自由」為一形上學法則。意即:「自由」現象所涉及的,不僅是人類意志或抉擇的問題,而同時關連著超越界之「絕對者」或「存有」的問題。關鍵即在於:如何在一個「涵蓋一切」的形上學體系,來探討「自由」的事實。謝林從「上帝內部」作出「上帝之根基」與「上帝之實存」的分別,並藉此二者的同一與辯證關係,來論述「惡」以及「自由」的可能性條件。本研究進一步分析:謝林《自由論文》的觀點,對海德格「自由 ...
孫雲平
core  

灰面鵟鷹機器人 彰師大新玩偶 [PDF]

open access: yes, 2015
[[abstract]]天上飛的灰面鵟鷹,也能變為舞林高手的機器人,你相信嗎?不要懷疑,國立彰化師範大學機電系學生做到了,學生把校園吉祥物「灰面鵟鷹」玩偶改造為會聞「樂」起舞的機器人,變化多端的舞姿,讓人驚豔。 彰師大機電系大四生陳志維、吳孟儒,看到人氣紅不讓的該校校園吉祥物「灰面鵟鷹」玩偶,只被當作櫥窗的擺飾,覺得很可惜,有一天心血來潮,就構想何不讓玩偶變成會動的機器人,來提升玩偶功能。 舞姿多變 動作高難度 他們並將想法付諸行動 ...
自由時報電子報記者 張聰秋
core  

BiOI负载Fe3O4光催化激活过硫酸盐降解金橙Ⅱ

open access: yesGongye shui chuli, 2017
采用溶剂热-沉淀法制备BiOI负载Fe3O4的新型可见光催化剂BiOI/Fe3O4,并通过X射线衍射(XRD)和扫描电镜(SEM)对BiOI/Fe3O4进行表征分析。实验结果表明:金橙Ⅱ的降解率随着初始过硫酸盐(PS)浓度和催化剂浓度的增大而增大。但当PS浓度、催化剂质量浓度分别增大到0.5 mmol/L、0.5 g/L时,降解率随着两者浓度的增大而降低。随着初始pH的增大,金橙Ⅱ的降解速率逐渐降低。此外,自由基淬灭剂异丙醇和叔丁醇的加入,证明了该体系主要的活性自由基是羟基自由基(·OH)和硫酸根自由基(
杨波   +5 more
doaj   +2 more sources

基于特征分裂法的自由表面流动算法

open access: yes, 2014
自由表面流动问题一直是计算流体动力学领域的研究的热点和难点。在工程上有着广泛的应用,具有重要的理论研究和实际工程意义。近年来,随着计算机技术和计算流体动力力学的发展,自由表面流动取得了一系列成果。本文建立了CBS(Characteristic-based Split)流体有限元框架下的自由表面流动模型。主要工作包括以下几个方面: a)采用CBS流体有限元求解不可压缩黏性流动,分析了线性方程组求解器CULA对压力Poisson方程求解的加速作用。 b)提出了一种新的求解不可压缩流动的流体有限元方法 ...
李宁宁
core   +2 more sources

Neutral interactions among non‐native plants are common

open access: yesNew Phytologist, Volume 252, Issue 1, Page 292-309, October 2026.
Global distribution of studies and overall effect of co‐invasion for all metrics of non‐native plant performance combined. Summary Globalization has accelerated the establishment of non‐native plant species, increasing the prevalence of multispecies co‐invasions; yet interactions among co‐invaders remain poorly understood.
Feng He   +7 more
wiley   +1 more source

一种有机自由基聚合物电极及其制备和应用

open access: yes, 2011
一种有机自由基聚合物电极及其制备和应用,所述电极包括有机自由基聚合物、高比容量碳材料、导电剂和粘结剂,其中有机自由基聚合物和高比容量碳材料是电极活性物质。电极中活性物质的质量含量为50~97%,其中有机自由基聚合物与高比容量碳材料的质量比为1∶0.3~30。电极活性物质中的高比容量碳材料的电导率大于或等于2S/cm,质量比容量大于或等于15mAh/g,比表面积大于或等于900m2/g。采用该发明方法制备的电极,兼具高能量密度和高功率密度,且电极材料价廉易得,制备方法简单易行 ...
陈剑, 刘承梅
core  

Canine Distemper Virus Research in China and Future Directions for Conservation 中国犬瘟热病毒研究现状与保护策略展望

open access: yesIntegrative Conservation, Volume 5, Issue 3, Page 268-280, September 2026.
ABSTRACT Canine distemper is a highly contagious, severe disease caused by the canine distemper virus (CDV). With a worldwide distribution and ever‐expanding list of susceptible hosts, CDV poses a growing risk for many threatened wildlife species, both in captivity and their native habitats. As a megadiverse country, China is home to myriad endemic and
Aliana C. Norris   +4 more
wiley   +1 more source

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