Results 11 to 20 of about 327,933 (148)

基于滚动转子式补气压缩机的准二级压缩热泵系统热力学分析

, 2018
在Tod=-10℃工况下调节压缩机工作频率及补气压力,实验研究R410A单缸滚动转子式压缩机系统的制热性能。试验测试系统采用双电子膨胀阀控制中间补气压力及压缩机吸气过热度。实验研究表明：随着补气压力的增加,中间补气系统的制热量逐渐增大,COPh呈现出先增加而后降低的趋势;而随着频率的增加,系统的制热量升高,系统COPh降低。相对于普通单级压缩系统,中间补气系统的制热量平均增长约26.1%,系统COPh在低频时最大提升幅度约为7.92%,在高频时其能效比相对较低。随着补气压力的增加,闪蒸器气液分离效率降低,
李修真, 朱冬生, 尹应德, 涂爱民, 孙晋飞   +4 more
core   +5 more sources

Protected areas on international borders show uneven conservation outcomes

Conservation Biology, EarlyView.
Abstract Border protected areas (BPAs) are national protected areas that are immediately adjacent to a country's border or span two or more countries; they are characterized by distinctive opportunities and pressures. They play a critical role in protecting carbon‐rich ecosystems, conserving endangered biodiversity, reducing cross‐border environmental ...
Rachakonda Sreekar, Hoong Chen Teo, Tiantian Zhang, Jiajia Liu, Aakash Lamba, Jun Ying Lim, Lian Pin Koh, Sean Jing Wen Ng, Janice Ser Huay Lee, James E. M. Watson, Yiwen Zeng   +10 more
wiley   +1 more source

A framework for integrating resilience indicators into risk assessments

Conservation Biology, EarlyView.
Abstract Globally, ecosystems are increasingly threatened by climate change and human pressures, yet ecosystem risk assessments predominantly emphasize exposure to stressors while overlooking intrinsic ecosystem resilience—the capacity to absorb and recover from disturbances.
Benoît Pichon, Sophie Donnet, Isabelle Gounand, Madhur Anand, Sonia Kéfi   +4 more
wiley   +1 more source

Disentangling atmospheric and soil drought: a new stand‐level manipulation approach for mature forests

New Phytologist, EarlyView.
Design of the VPDrought experiment in a Scots pine (Pinus sylvestris) forest at the Pfynwald research platform. Summary Atmospheric and soil drought are major, yet typically confounded, drivers of tree stress. Rising vapor pressure deficit (VPD) may impair forest function independently of soil moisture decline, yet stand‐scale experimental separation ...
Marcus Schaub, Stefan Hunziker, Jonas Gisler, Giovanni Bortolami, Volodymyr Trotsiuk, Katrin Meusburger, Christian Hug, Andreas Rigling, Arthur Gessler, Charlotte Grossiord   +9 more
wiley   +1 more source

Grain Boundary Density Governs the Discharge Behavior of Mg Anodes in Biodegradable Batteries

Rare Metals, Volume 45, Issue 11, November 2026.
ABSTRACT Biodegradable magnesium (Mg) alloys have entered clinical use, yet their development as self‐powered absorbable batteries is hindered by poor anode performance, including high self‐corrosion, passivation, and nonuniform dissolution. The role of grain boundary density in governing discharge behavior remains unclear.
Xiaohui Shao, Zhe Zhao, Xiaonong Zhang, Wenhui Wang   +3 more
wiley   +1 more source

Precipitation‐mediated asymmetric fitness consequences of nectar robbing in distylous Primula florindae

Functional Ecology, Volume 40, Issue 11, Page 3606-3623, November 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Flowers with deep corollas are frequently associated with nectar robbing, a behaviour that often reduces pollen transfer and seed production. Robbing scars, however, may further affect plant reproductive success through rainwater entry into corolla tubes.
Wu Sun, Judith Trunschke, Run‐Dong Shi, Hao Wang, Chang‐Yun Zheng, Zi‐Lin Xu, Jie Zhang   +6 more
wiley   +1 more source

Boosting Decomposition and Combustion of TKX‐50 and HTPB/TKX‐50 Propellants With NH2‐MIL‐88B(Fe) MOF

Rare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Dihydroxylammonium 5,5′‐bistetrazole‐1,1′‐diolate (TKX‐50) is a promising energetic material that possesses both exceptional energy density and low sensitivity. Nevertheless, its application is hindered by incomplete pyrolysis during combustion or explosion. Various strategies, including eutectic formation, composite preparation, and catalysis,
Jingwen Chen, Yong Kou, Qiangqiang Lu, Hongfeng Ji, Dongqi Liu, Xiaojun Feng, Kun Zhang, Guigao Liu, Wei Jiang, Jun Di, Gazi Hao   +10 more
wiley   +1 more source

High‐Entropy Engineering Enables Highly Exposed Mn3+ Active Sites and Stable Mn–O Coordination in α‐MnO2 for Efficient Bifunctional Oxygen Electrocatalysis

Rare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Non‐noble metal oxygen electrocatalysts are essential for low‐cost rechargeable metal‐air batteries and fuel cells, determining their energy conversion efficiency. However, such electrocatalysts are limited by inadequate bifunctional activity and stability toward the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).
Lixin Sun, Rui Zhao, Xuerong Zheng, Weiwei Han, Xin Zhao, Junda Lu, Weixin Song, Shixun Wang, Wenqiang Xie, Yan Dong, Bin Xiang, Lixiong Yin, Haoliang Chen, Wenjie Huang, Yida Deng   +14 more
wiley   +1 more source

Doping‐Engineered Modulation of Oxygen Vacancy Formation Energy in Gallium Oxide for High‐Performance Solar‐Blind UV Photodetectors

Rare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT Solar‐blind ultraviolet (UV) photodetectors (SBPDs) play a critical role in applications including UV communication and fire warning systems. Gallium oxide (Ga2O3) has emerged as a promising material due to its wide bandgap and low cost, but suffers from high dark current and slow response speed caused by oxygen vacancy (VO) defects. This work
Yuhao Lin, Daigan Wang, Runze Zhu, Qian Wan, Chenwen Shi, Zirui Shen, Dong Li, Cong Jiang, Jieqiong Zhang, Wei Han, Chenyin Feng, Liangping Shen, Baoyuan Wang, Houzhao Wan, Hao Wang   +14 more
wiley   +1 more source

低气压系统流速和微小压差的测量

, 1980
一、引言测量气体流速通常用皮托管。皮托管用来测量气流的总压和静压之差,也就是动压,而求出气体的流动速度。这样,流速的测量也能归结为气体压差的测量。测量气体压差还可用来测量流动管道各段的压头损失和动力源(如风机等)的增压。一般来说,测量气体压差有多种方法。U管压强计、斜管式压强计,双液式差压计是其中的一些常用方法。所充的液体也根据不同的测试要求和范围,有水银、水、酒精 ...
林光海
core   +1 more source