Results 61 to 70 of about 148,126 (251)

Viologen‐based host–guest supramolecule with tunable intramolecular/intermolecular electron transfer chromism and dynamic fluorescence

open access: yesAggregate, Volume 5, Issue 5, October 2024.
A new viologen‐based host–guest supramolecule of 12+@Me‐β‐CD was obtained through electrostatic interactions between viologen 12+ and macrocycle Me‐β‐CD in a 1:1 ratio, which exhibits tunable photo‐/chemo‐/thermo‐stimuli intramolecular and intermolecular electron transfer chromism and strong luminescence in solid–liquid dual states.
Zhiang Bai   +9 more
wiley   +1 more source

Legislative developments in personal insolvency in China’s mainland: A comparative analysis of regional practices in China’s mainland, Hong Kong, and Taiwan Region

open access: yesInternational Insolvency Review, Volume 33, Issue 3, Page 473-492, Winter 2024.
Abstract With the ongoing implementation of personal insolvency practices in China’s mainland, the realization of a nationwide personal insolvency system in China’s mainland no longer appears distant. In the design of specific personal insolvency schemes, key elements to consider are establishing entry criteria, assessing the integrity of debtors ...
Pin Liu
wiley   +1 more source

Mg-Zn-Zr-Ce合金高温变形行为与热加工性能研究

open access: yes, 2012
The hot deformation behavior of the T4-treated Mg-6Zn-0.5Zr-0.5Ce alloy was investigated by compressive test using Gleeble 3800 thermal-simulator in the temperature range of 523—673 Kand strain rate range of 0.001—1.0 s~(-1).The results show that the ...
余晖   +4 more
semanticscholar   +1 more source

Drawing up shear stress-strain graphs of the mild steel in high temperature [PDF]

open access: yes, 1955
P. H. Kaar published the paper treating a method of obtaining shear stress-strain graphs by interpretation of moment-twist data in Trans. of the ASME, May, 1953. The author tested the torsion of the carbon steel (c=O.26%) in high temperature -- 300℃, 400℃
高辻 雄三
core   +1 more source

Demographic and net primary productivity dynamics of primary and secondary tropical forests in Southwest China under a changing climate 气候变化背景下中国西南热带原始林和次生林的群落和净初级生产力动态研究

open access: yesIntegrative Conservation, Volume 3, Issue 3, Page 230-243, September 2024.
Tropical secondary forest at early sucessional stage had higher diamter growth rate and mortality rate, however, these forests also are more risked to droughts and high temperatures. Rising temperatures and more frequent droughts may decrease the carbon sink capacity of tropical forest ecosystems. Abstract Tropical forests are major carbon sinks on the
Sai Tun Tun Oo   +11 more
wiley   +1 more source

Research on the structure and properties of SiC ceramic containing titanium and boron [PDF]

open access: yes, 2016
碳化硅(SiC)陶瓷具有高强度、高硬度、耐高温、抗氧化、抗化学腐蚀、低热膨胀系数、高热传导率等众多特点,不仅被广泛应用在功能陶瓷、高级耐火材料、磨料及冶金原料等民用领域,还应用于航空航天领域,用作发动机的热端部件。为了提高先驱体转化法制备碳化硅陶瓷的耐高温性和吸波性能,本文将钛、硼元素引入陶瓷先驱体中,利用二者高温下生成的二硼化钛作为SiC陶瓷的烧结助剂,提高SiC陶瓷的耐高温性能,并利用钛元素提高陶瓷的吸波性能,系统研究了钛硼的引入,陶瓷结构与性能的演变规律。 首先,固定先驱体中硼元素的含量 ...
李风萍
core  

Influence of microclimate and forest management on bat species faced with global change

open access: yesConservation Biology, Volume 38, Issue 4, August 2024.
Abstract Climate refugia, areas where climate is expected to remain relatively stable, can offer a near‐term safe haven for species sensitive to warming temperatures and drought. Understanding the influence of temperature, moisture, and disturbance on sensitive species is critical during this time of rapid climate change.
Chelsea L. Andreozzi   +3 more
wiley   +1 more source

高温空气燃烧技术在隧道窑中的应用研究

open access: yes工程建设
高温空气燃烧技术的应用,不仅可以提升工业炉内部的燃烧效率,而且可以减少污染物的排放。燃烧的温度越高,产生的热量越多,说明燃烧的越充分。窑内的温度越高,烟气中CO、CxHy、H2的含量也会大大增加,之后降低,循环这样的过程。文章围绕高温空气燃烧技术,论述隧道窑中燃烧技术的应用,并提出相应的改造措施,仅供参考。
闯 张
semanticscholar   +1 more source

受拉焊接空心球节点火灾高温下的性能分析

open access: yesJianzhu Gangjiegou Jinzhan, 2011
基于火灾高温下空间网格结构的性能,本文根据欧洲规范了中高温下的钢材特性和国际标准升温曲线(ISO834),对单轴受拉焊接空心球节点高温下的性能进行了数值模拟,分析了空心球的温度场分布规律和极限耐火时间的影响因素。通过分析高温下空心球的应力和位移变化特征,确定了其破坏模式;结果表明钢管根部和赤道处是其高温下受拉承载力的薄弱环节。
邱林波, 薛素铎, 李雄彦, 冯淼
doaj  

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