中国科学院机构知识库网格系统: 检索

The Impact of Restoration and Protection Based on Sustainable Development Goals on Urban Wetland Health: A Case of Yinchuan Plain Urban Wetland Ecosystem, Ningxia, China 期刊论文 OAI收割
SUSTAINABILITY, 2023, 卷号: 15, 期号: 16, 页码: 19
作者: Wu, Xiaolan; Bu, Xiaoyan; Dong, Suocheng; Ma, Yushuang; Ma, Yan

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收藏 | 浏览/下载：30/0 | 提交时间：2023/10/09

urban wetlands ecological health SDGs-PSR-EES model obstacle degree model restoration and conservation project

Evolution process and obstacle factors of ecological security in western China, a case study of Qinghai province 期刊论文 OAI收割
ECOLOGICAL INDICATORS, 2020, 卷号: 117, 页码: 8
作者: Fan, Yupeng; Fang, Chuanglin

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收藏 | 浏览/下载：23/0 | 提交时间：2021/03/18

Ecological security PSR model Obstacle degree model Systems ecology theory Policy recommendation Qinghai

Evolution process and obstacle factors of ecological security in western China, a case study of Qinghai province 期刊论文 OAI收割
ECOLOGICAL INDICATORS, 2020, 卷号: 117, 页码: 8
作者: Fan, Yupeng; Fang, Chuanglin

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收藏 | 浏览/下载：17/0 | 提交时间：2021/03/18

Ecological security PSR model Obstacle degree model Systems ecology theory Policy recommendation Qinghai

The braking index of PSR B0540-69 and the associated pulsar wind nebula emission after spin-down rate transition 期刊论文 OAI收割
Monthly Notices of the Royal Astronomical Society, 2020, 卷号: 494, 页码: 1865-1870
作者: HXMT

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收藏 | 浏览/下载：54/0 | 提交时间：2022/02/08

stars: magnetic field stars: neutron pulsars: general Astrophysics - High Energy Astrophysical Phenomena Abstract: In 2011 December, PSR B054-69 experienced a spin-down rate transition (SRT), after which the spin-down power of the pulsar increased by $\sim 36{{\ \rm per\ cent}}$. About 1000 d after the SRT, the X-ray luminosity of the associated pulsar wind nebula (PWN) was found to brighten by $32\pm 8{{\ \rm per\ cent}}$. After the SRT, the braking index n of PSR B0540-69 changes from n = 2.12 to 0.03 and then keeps this value for about five years before rising to n = 0.9 in the following years. We find that most of the current models have difficulties in explaining the measured braking index. One exceptive model of the braking index evolution is the increasing dipole magnetic field of PSR B0540-69. We suggest that the field increase may result from some instabilities within the pulsar core that enhance the poloidal component at the price of toroidal component of the magnetic field. The increasing dipole magnetic field will result in the X-ray brightening of the PWN. We fit the PWN X-ray light curve by two models: one assumes a constant magnetic field within the PWN during the brightening and the other assumes an enhanced magnetic field proportional to the energy density of the PWN. It appears that the two models fit the data well, though the later model seems to fit the data a bit better. This provides marginal observational evidence that magnetic field in the PWN is generated by the termination shock. Future high-quality and high-cadence data are required to draw a solid conclusion.

Selected Environmental Assessment Model and Spatial Analysis Method to Explain Correlations in Environmental and Socio-Economic Data with Possible Application for Explaining the State of the Ecosystem 期刊论文 OAI收割
SUSTAINABILITY, 2019, 卷号: 11, 期号: 17, 页码: 26
作者: Xiong, Junnan; Li, Wei; Zhang, Hao; Cheng, Weiming; Ye, Chongchong

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收藏 | 浏览/下载：63/0 | 提交时间：2020/05/19

ecosystem health spatial evolution PSR model Hu Line Southwest China

Selected Environmental Assessment Model and Spatial Analysis Method to Explain Correlations in Environmental and Socio-Economic Data with Possible Application for Explaining the State of the Ecosystem 期刊论文 OAI收割
SUSTAINABILITY, 2019, 卷号: 11, 期号: 17, 页码: 26
作者: Xiong, Junnan; Li, Wei; Zhang, Hao; Cheng, Weiming; Ye, Chongchong

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收藏 | 浏览/下载：5/0 | 提交时间：2020/05/19

ecosystem health spatial evolution PSR model Hu Line Southwest China

Selected Environmental Assessment Model and Spatial Analysis Method to Explain Correlations in Environmental and Socio-Economic Data with Possible Application for Explaining the State of the Ecosystem 期刊论文 OAI收割
SUSTAINABILITY, 2019, 卷号: 11, 期号: 17, 页码: 4781
作者: Xiong Junnan; Li Wei; Zhang Hao; Cheng Weiming; Ye Chongchong

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收藏 | 浏览/下载：79/0 | 提交时间：2019/11/26

ecosystem health spatial evolution PSR model Hu Line Southwest China

MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY 期刊论文 OAI收割
Astrophysical Journal, 2016, 卷号: 816, 期号: 2, 页码: 76
作者: Lu, J. G.; Du, Y. J.; Hao, L. F.; Yan, Z.; Liu, Z. Y.

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收藏 | 浏览/下载：26/0 | 提交时间：2019/12/09

acceleration of particles pulsars: general pulsars: individual (PSR B1133+16) radiation mechanisms: non-thermal INVERSE COMPTON-SCATTERING GAMMA-RAY EMISSION PULSAR EMISSION FREQUENCY-DEPENDENCE ANNULAR GAP EMPIRICAL-THEORY CRAB PULSAR ICS MODEL BEAMS CORE Astronomy & Astrophysics

矿粮复合区土地生态安全评价——以焦作市为例/Evaluation of eco-security of land for the overlapped areas of crop and mineral production: A case of Jiaozuo City[J] 期刊论文 OAI收割
干旱区地理, 2013, 卷号: 36, 期号: 6, 页码: 1067-1075
作者: 丁新原; 周智彬; 马守臣; 甘萍; 中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,新疆乌鲁木齐830011

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收藏 | 浏览/下载：22/0 | 提交时间：2017/12/29

土地生态安全 Psr模型评价指标体系综合指数矿粮复合区 Eco-security Of LAnd Psr Model Evaluation Index System Comprehensive Index Overlapped Areas Of Crop And Mineral Production

CASE STUDIES ON SUSTAINABILITY ASSESSMENT OF URBAN WETLAND RESOURCES 期刊论文 OAI收割
FRESENIUS ENVIRONMENTAL BULLETIN, 2013, 卷号: 22, 期号: 12, 页码: 3458-3464
作者: Xu, Hong; Wu, Junmei; Zhao, Pengda; Wu, Zhenbin

收藏 | 浏览/下载：21/0 | 提交时间：2014/08/06

urban wetland sustainability assessment Pressure-State-Response (PSR) model Analytic Hierarchy Process (AHP) Delphi method