Results 41 to 50 of about 21,895 (149)

基于风险的电-热综合能源系统风电消纳能力评估 [PDF]

open access: yes全球能源互联网, 2019
伴随风电大规模接入电网,其不确定性为电网的决策调度带来了新的挑战,风电消纳评估由此成为研究热点之一。以不确定集合表征风电不确定性,建立了两阶段鲁棒优化模型,以解决电-热综合能源系统的风电消纳能力评估问题。主问题基于风险指标优化风电可消纳域,并在算法处理中引入分段线性化处理非线性的风险表达式;子问题引入风电可接纳判据寻求风电不确定集合中的极端场景。最后着重比较电-热综合能源系统与电力系统的风电消纳能力差异。
巩志皓, 王程
doaj   +1 more source

Are Galliformes of the High Himalayas Well Protected? Identifying Conservation Priority Areas Using an Assemblage‐Level Approach 高喜马拉雅地区的鸡形目鸟类是否得到了有效保护?利用群落水平方法确定优先保护区域

open access: yesIntegrative Conservation, EarlyView.
This study investigates distribution patterns of Galliforms in the Indian Himalayas, focusing on factors influencing their occurrence, regions of high diversity and endemism, and their overlap with protected areas. Our study highlights the need for assemblage‐level conservation strategies in high Himalaya which primarily relies on snow leopard‐focused ...
Manvi Sharma   +5 more
wiley   +1 more source

Impacts of Human Development on Wildlife Use of Corridors in Botswana 人类开发对博茨瓦纳野生动物廊道利用的影响

open access: yesIntegrative Conservation, EarlyView.
This study examined the effect of landscape‐scale human impact on wildlife in Botswana. We examined how species use wildlife corridors in two different human‐dominated landscapes. We identified differences in temporal overlap between wildlife and humans across both landscapes, which is fundamental to consider in both current and future conservation ...
Tempe S. F. Adams   +3 more
wiley   +1 more source

Studies on Electronic Structures and Spectra of Fullerenes Doped with Nitrogen and Boron(氮杂及硼杂碳笼的电子结构和光谱研究)

open access: yesZhejiang Daxue xuebao. Lixue ban, 1999
用INDO方法研究了氮杂与硼杂碳笼CnX(n=59,69;X=N+,B-)的电子结构和光谱,表明CnX与C60,C70相比将发生结构畸变,氮杂碳笼比硼杂碳笼稳定,C70中靠近极附近的两种C原子易被杂原子置换.本文在对电子跃迁进行理论指认的同时,讨论了光谱红移的原因.
TENGQi-wen(滕启文), WUShi(吴师)
doaj   +1 more source

Justice in coexistence: Pastoralism and large carnivores on the Qinghai‐Tibet Plateau

open access: yesPeople and Nature, EarlyView.
Abstract The conflict between livestock husbandry and large carnivore conservation presents significant challenges in grassland ecosystems worldwide. Achieving sustainable coexistence among herders, livestock and large carnivores requires reconciling diverse perspectives and interests through equitable, inclusive and fair processes that address both ...
Yufang Gao, Yue Yu
wiley   +1 more source

面向工业园区的综合能源系统协同规划方法研究综述 [PDF]

open access: yes全球能源互联网, 2019
当前中国正处在能源结构转型的关键阶段,传统能源结构的利用效率受限,多种能源相互协同发展受阻,经济效益也徘徊在较低水平。以能源革命为背景,发展综合能源系统是能源结构转型的重要组成部分。其以智能电网为核心枢纽,结合电网、天然气网、热传输网以及多能耦合设备,利用多种能源的耦合性和互补替代性,不仅可弥补可再生能源的间歇性和随机性波动等问题,也可加强供给侧和需求侧的相互响应,提高综合能源利用效率,通过协同方式实现资源的最佳配置。目前中国综合能源系统示范工程大多在工业园区落成,因此围绕工业园区综合能源系统这一背景 ...
蒋超凡, 艾欣
doaj   +1 more source

Scaling from microsite to landscape to resolve litter decomposition dynamics in globally extensive drylands

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop   +8 more
wiley   +1 more source

Field Ionization Multiple Thresholds for 5snd1D2 Rydberg States of Atom Sr(Sr原子5snd1D2Rydberg态的多重电离阈)

open access: yesZhejiang Daxue xuebao. Lixue ban, 1999
对Sr原子5snd1D2(n=22~27),|m|=0,1,2各Rydberg态的场电离阈作了实验测定和理论计算.讨论了原子场电离过程中的能级Stark位移,电离的绝热或非绝热路径以及环境热辐射等因素对场电离可能产生影响.
QIUJi-zhen(邱济真), LIJing(郦菁)
doaj   +1 more source

Elevation, soil pH and calcium availability shape regional and local scale spatial patterns of PhoD gene abundance in tropical and subtropical forests

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra   +3 more
wiley   +1 more source

Fluorescence Reaction of 3,4-Dihydroxyphenylalanine and Terbium(Ⅲ) Ion and Its Analytical Application(铽离子与3,4-二羟苯丙氨酸的荧光反应及其分析应用)

open access: yesZhejiang Daxue xuebao. Lixue ban, 1999
实验发现稀土铽离子能与3,4-二羟苯丙氨酸发生络合反应,并发射出铽离子的特征荧光.本文对铽离子与3,4-二羟苯丙氨酸的络合发光反应进行了详细研究,由此提出了一种简便、快速、灵敏检测3,4-二羟苯丙氨酸的新方法,并且试验了其它氨基酸对其测定的干扰情况,表明该法具有较好的选择性.在激发波长为300nm,发射波长为490nm与550nm处测定其荧光强度,3,4-二羟苯丙氨酸浓度在2.0×10-8~5.0×10-5mol/L范围内与体系的荧光强度具有良好的线性关系,相关系数为0.9992,其检出限为6.0×10-
ShenXueyou(沈学优)   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy