Results 91 to 100 of about 4,158 (239)
碳纤维拉索具有轻质和超高抗拉强度的优点,适用于建筑结构的受拉构件中,其应用的推广有助于推进建筑行业节能减排的进行。国内目前尚未出台关于碳纤维索结构设计方面的规范和标准,高强度、大吨位的碳纤维索在我国房屋建筑中尚无应用先例。为了推进碳纤维索的研究和应用,在美的全球创新园区项目中,局部应用了强度等级为2 800 MPa的高强度碳纤维平行筋索,其中规格为7×139拉索的破断荷载达14 991 kN。文章介绍了在项目中碳纤维索的力学性能和承载力的确定过程及碳纤维索结构的抗震计算和防连续倒塌计算 ...
李明菲, 邢佳宇
doaj +2 more sources
光纤在拉丝过程中,用沉积密封碳层的方法保护光纤,可以避免 H2和 H2O 引起的光纤损耗增加和强度衰退。在升温和氢压条件下,把碳密封涂层光纤暴露到 H2气中,光纤的损耗特性与 H2或与 H2和 SiO2中的缺陷反应形成的 OH 基团有关。在100~150℃范围内,用圆柱状的经典扩散理论以及 H2在碳中的溶解度和扩散系数提出了 H2的扩散模型。
竺逸年
doaj
A Systems Thinking Approach to Nuclear Pedagogy and Workforce Development
ABSTRACT Nuclear technology's controversial status has been shaped by its early use in military applications, fear driven by high‐profile accidents, and unresolved waste management challenges. There have, on the other hand, been periodic claims that a “nuclear renaissance” is imminent, driven by different dynamics at different times, most recently ...
Brandon Costelloe‐Kuehn+4 more
wiley +1 more source
Plant nutrient‐acquisition strategies contribute to species replacement during primary succession
Pioneer species Hippophae acquires phosphorus and nitrogen mainly by ‘mining’ and N2‐fixing strategies and thus dominates in the beginning of primary succession. As soil nutrient availability increases with the mobilization of apatite‐P and input of N‐rich plant residues, Hippophae' strategies become less efficient than Populus's scavenging strategies.
Xiao‐Long Li+12 more
wiley +1 more source
跨国电网互联情景下的碳流及碳减排效益研究—以非洲能源互联网为例
全球能源系统正在经历转型,未来的能源体系中将以清洁能源和电力为主导,因此有必要研究一套针对清洁能源电力的碳减排核算方法。在传统“碳流”概念的基础上,针对清洁能源电力提出了广义碳流概念,以此引申定义了电网互联情景下的负碳流,并提出了消费侧视角下包含多种能源的电力系统碳排放核算方法。基于碳流工具,能够从消费侧精确评估电网互联下的清洁电力输送的减排效益。以非洲跨国电网互联情景为例,非洲通过洲内电网互联促进清洁电力输送,至2030年总的“负碳流”为2700万t CO2/年;至2050年“负碳流”可达8700万t
谭新+5 more
doaj +1 more source
对液相中形成纳米碳酸钙所加的分散剂和晶型控制剂,温度、浓度和搅拌速度等对晶形及聚集态的影响作了初步的研究.在反应温度8~15 ℃,反应物浓度0.1~0.4 mol/L,搅拌速度3~20 r/s,反应物加料时间4~12 min的工艺条件下,可制备出粒径约50 nm的高分散纳米碳酸钙,所控条件和相应的产品结果较令人满意.
FANGWei-min(方卫民)+1 more
doaj +1 more source
Amazonian conservation across archipelagos of Indigenous territories
Abstract Indigenous stewardship is essential to the conservation of biocultural diversity, yet conventional conservation models often treat Indigenous territories (ITs) as homogeneous or isolated units. We propose that archipelagos of Indigenous territories (AITs), clusters of ITs that span geographies but are connected through shared cultural or ...
Michael S. Esbach+3 more
wiley +1 more source
Countermeasures for the Development of China's New Highway Transportation-Energy Integrated System [PDF]
[Introduction] China's transportation sector is a significant contributor to carbon emissions. To achieve carbon peaking and neutrality, developing a new transportation-energy integrated system based on energy Internet is a crucial step for the low ...
Can ZHANG, Mingzhen ZHANG
core +1 more source
The need for carbon finance schemes to tackle overexploitation of tropical forest wildlife
Abstract Defaunation of tropical forests, particularly from unsustainable hunting, has diminished populations of key seed dispersers for many tree species, driving shifts in forest community composition toward small‐fruited or wind‐dispersed trees with low wood density. Such shifts can reduce aboveground biomass, prompting calls for overexploitation to
Caroline E. Milson+3 more
wiley +1 more source
Research Review of CO2 Capture, Utilization and Storage Technology in Zhejiang Province [PDF]
[Introduction] The green and low-carbon transformation and industrial restructuring under the premise of energy security is a serious challenge faced by Zhejiang Province to achieve its "carbon peaking and carbon neutrality" goals.
Chenglong HOU+6 more
core +1 more source