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New Phytologist, Volume 251, Issue 3, Page 1267-1282, August 2026.Biosynthesis and accumulation of tanshinones in the periderm of Salvia miltiorrhiza during secondary root growth. Summary Perennial herbs develop long‐lived roots that undergo repeated cycles of secondary growth, during which the periderm functions as a protective barrier and a major site of specialized metabolite accumulation.
Licheng Liu +19 more
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Integrative Conservation, Volume 5, Issue 2, Page 177-191, June 2026.A survey of IUCN Bear Specialist Group (BSG) members revealed that habitat loss, degradation and fragmentation is the greatest threat to each of the 7 species of terrestrial bears. Poaching and human–bear conflicts are also high threats for some of these species.
David L. Garshelis +3 more
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Gaoya dianqi, 2018 文中以特高压直流输电线路保护为对象,分析了国内外实际工程应用中继电保护技术和原理存在的问题。行波保护作为现有特高压直流线路的主保护优势明显,但存在耐过渡电阻能力有限、对采样频率要求高等问题。微分欠压保护作为行波保护的冗余保护,缺点类似行波保护,同时缺乏整定依据等。低电压保护在耐过渡电阻能力方面较强,但其选择性较差,动作速度不够快。电流纵差保护选择性好,但由于受到线路分布电容的影响且动作时间长。文中通过梳理当前特高压直流输电线路继电保护技术进展以及存在的问题,并提出利用边界元件、特征频率 ...
李振兴 +4 more
doaj
野生动物学报, 2023 为了解甘肃白水江国家级自然保护区周边社区人兽冲突现状，为自然保护区解决人兽冲突提供建议，2021年在白水江国家级自然保护区内开展周边社区人兽冲突情况调查。结果显示：野猪（Sus scrofa）和亚洲黑熊（Ursus thibetanus）是保护区内人兽冲突涉及的主要野生动物；玉米（Zea mays）是最常被破坏的农作物；还发生多起野生动物造成人身伤害的安全。在防护措施上，主要以社区居民的围网和警示性伪装物驱赶为主，防护效果较差。相关补偿政策由于资金缺乏大部分不能落实，影响了保护成效和自发保护的积极性 ...
乔明, 侯平, 黄建
doaj
, 1994 加强劳动保护与职工安全意识中国科学院心理研究所博士研究生林泽炎工矿企业实施劳动保护，在某种意义上可以说是为了唤起并强化广大职工的安全意识。调查得知，许多工矿企业及安全管理部门制定劳动保护措施，一般是根据事故造成的后果制定的，很少顾及职工本身的生理、心..
林泽炎
core
Wildlife Letters, Volume 4, Issue 2, Page 66-72, June 2026.Tracking with GPS and accelerometers shows that great evening bats in subtropical China use two overwintering strategies: some remain in continuous hibernation, while others switch between torpor and activity as temperatures change. This behavioral flexibility, shaped by climate, underscores the importance of protecting diverse roosting habitats for ...
Zhiqiang Wang +7 more
wiley +1 more source
Gaoya dianqi, 2018 通过对电力系统异步运行状态特征的研究,提出一种集成于线路保护的失步判别新方法。该方法由3部分元件组成:失步起动诊断元件、失步区域判断元件和失步跳闸时机选择元件。失步起动诊断元件利用系统两侧的功角差和功角滑差判断电力系统是否开始发生失步。失步区域判断元件利用线路保护中距离保护Ⅱ段的起动信息判断失步解列的区域。失步跳闸时机选择元件通过Ucos原理统计失步次数,并利用功角差作为辅助判据来选择最佳跳闸时机。当3个元件同时动作时,失步保护动作将系统解列。该方法准确可靠且不受系统运行方式影响。通过RTDS仿真实验 ...
张洪喜 +4 more
doaj
Wildlife Letters, Volume 4, Issue 2, Page 83-93, June 2026.Birdwatching in Nepal has high potential to support avain biodiversity and tourism. Conservation was identified as the primary motivation for birdwatching, followed by enjoyment and achievement purposes. Health/wellbeing benefits, social and economic factors showed moderate representation, whereas academic motivation played a relatively minor role ...
Kamal Raj Gosai, Hem Bahadur Katuwal
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