中国科学院机构知识库网格系统: 检索

An unknown component of a well-known population: socio-demographic parameters of Indo-Pacific humpback dolphins (Sousa chinensis) at the western reaches of the Pearl River Delta region 期刊论文 OAI收割
MAMMALIAN BIOLOGY, 2023, 卷号: 1, 页码: 23
作者: Chan, Stephen C. Y.; Karczmarski, Leszek; Lin, Wenzhi; Zheng, Ruiqiang; Ho, Yuen-Wa

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收藏 | 浏览/下载：25/0 | 提交时间：2023/03/03

Coastal inshore delphinid Fission-fusion dynamics Heterogeneous social structure Mark-recapture analyses Population size estimate Survival estimate Sousa chinensis Southeast China

Linking Microbial Community Structure to S, N and Fe Biogeochemical Cycling in the Hot Springs at the Tengchong Geothermal Fields, Southwest China 期刊论文 OAI收割
GEOMICROBIOLOGY JOURNAL, 2016, 卷号: 33, 期号: 2, 页码: 135-150
作者: Li, Jiwei; Jiang, Lei; Chen, Shun

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收藏 | 浏览/下载：29/0 | 提交时间：2016/07/11

Community Structure Metabolic Activities Mineralogical And Geochemical Analyses Terrestrial Geothermal Field s Fe And n Biogeochemical Cycles

Genetic diversity and population structure of largehead hairtail, Trichiurus japonicus, based on mtDNA control region 期刊论文 OAI收割
MITOCHONDRIAL DNA, 2014, 卷号: 25, 期号: 6, 页码: 473-481
作者: Xiao, Yongshuang; Ren, Guijing; Song, Na; Li, Jun; Gao, Tianxiang

收藏 | 浏览/下载：33/0 | 提交时间：2015/06/11

Coalescent analyses genetic diversity population structure Trichiurus japonicus

Structure and magnetic properties of (Al, Co) Co-doped ZnO thin films (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Materials Science and Nanotechnology, ICMSN 2012, November 16, 2012 - November 18, 2012, Guangzhou, China
Cao P.; Bai Y.

收藏 | 浏览/下载：37/0 | 提交时间：2013/03/25

In this study Zn0.99Co0.01Al0.015O thin film has been prepared by sol-gel method. The structural and magnetic properties of the sample were investigated. X-ray diffraction spectroscopy analyses indicate that the Co and Al codoping can not disturb the structure of ZnO. No additional peaks are observed in the Zn0.99Co0.01Al xO and Al3+ and Co2+ substitute for Zn 2+ without changing the wurtzite structure. The resistance measurements confirm that Al ions increase the free carriers concentration. Based on the above experiments we think the ferromagnetic behavior of the sample could not originate from Co nanoclusters. The presence of free carriers and localized d spins is a prerequisite for the appearance of ferromagnetism. As the result the carriers generated by Al doping is considered a main factor to induce the ferromagnetic phenomenon. (2013) Trans Tech Publications Switzerland.

Factor structure of acute stress disorder symptoms in Chinese earthquake victims: A confirmatory factor analysis of the acute stress disorder scale 期刊论文 OAI收割
PERSONALITY AND INDIVIDUAL DIFFERENCES, 2010, 卷号: 48, 期号: 7, 页码: 798-802
作者: Wang, Li; Li, Zhongquan; Shi, Zhanbiao; Zhang, Yuqing; Shen, Jianhuan

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收藏 | 浏览/下载：27/0 | 提交时间：2011/12/02

Acute stress disorder scale Factor structure Confirmatory factor analyses Earthquake China

Land use dynamics and landscape change pattern in Hetao irrigation district, Inner Mongolia, China 会议论文 OAI收割
6th International Symposium on Digital Earth: Data Processing and Applications, Beijing, China, September 9, 2009 - September 12,2009
Zhang, Yinhui; Luo, Yi; Zhao, Wenwu

收藏 | 浏览/下载：32/0 | 提交时间：2014/12/07

This study analyzed spatial and temporal changes in land use in an irrigation district covering an area of 1.7 million ha in Northern China by GIS analyses and also investigated changes in landscape pattern using the landscape structure analysis program FRAGSTATS over the study period from 1986 to 2000. The decreases in farmland and the increases in grassland area mainly resulted from the policy of grain for green and converting slope farmland into pasture from China government. In spite of the efforts to conserve the fragile ecosystem the land degradation including soil salinization and grassland degradation was spreading rapidly. The area of alkali-saline land increased by 22493 ha and about 50555 ha of dense grassland degraded into mid-density grassland. In terms of landscape fragmentation both farmland and dense grassland showed the tendency of increased fragmentation. Both adverse natural conditions and human activities are responsible for the land degradation expansion in Hetao irrigation district but the root causes are increasing population pressure and irrational human activities such as flooding irrigation method and over-grazing. To prevent land degradation from spreading population control and improvement of the management are prerequisite approaches. 2010 SPIE.

Close coupling between phytoplankton growth and microzooplankton grazing in the western South China Sea 期刊论文 OAI收割
LIMNOLOGY AND OCEANOGRAPHY, 2009, 卷号: 54, 期号: 4, 页码: 1084-1097
作者: Chen, Bingzhang; Liu, Hongbin; Landry, Michael R.; Dai, Minhan; Huang, Bangqin

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收藏 | 浏览/下载：21/0 | 提交时间：2010/12/22

Microbial Community Structure Flow-cytometric Analyses Equatorial Pacific Mesoscale Eddy North Pacific Prochlorococcus Waters Picoplankton Variability Surface

Two complexes (Cu, Zn) with 1,10-phenanthroline and a tridentate amino-Schiff-base: crystal structures, spectra, thermogravimetric analyses and superoxide dismutase activity 期刊论文 OAI收割
JOURNAL OF COORDINATION CHEMISTRY, 2009, 卷号: 62, 期号: 5, 页码: 745-756
作者: Han, Jing; Xing, Yongheng; Wang, Che; Hou, Peng; Bai, Fengying

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收藏 | 浏览/下载：27/0 | 提交时间：2019/04/09

Transition Metal Complexes Amino-schiff-base Crystal Structure Thermogravimetric Analyses Sod-like Activity

The spectral feature analysis of semiconductor thin disk laser (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Materials and Devices II, November 2, 2007 - November 5, 2007, Wuhan, China
作者: Li J.; Wang L.-J.; Wang L.-J.; Ning Y.-Q.; Li J.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

The semiconductor thin disk laser is a new type of semiconductor laser. This work gives the basic operation function of semiconductor disk laser and analyses the heat effect by the experimentally measured photoluminescence spectrum of the laser chip at different pump power and different temperature. We can see that: with increasing pump power the thermal effects of the gain material becomes seriously and causes the saturation of carrier lifetime so the electron-hole pair created in the absorbtion layer have no enough time to rate to one of the wells and the non-radiative recombination happens in the barrier. When the thermal effects becomes stronger the chip will not lasing. This phenomenon is from the smaller energy offset between barrier and quantum well. We optimize the original structure design and experimental technology. A non-absorbing AlGaAs layer who is transparent to the pumping and laser wavelength is added to confine the carriers in the quantum wells. At the same time a DBR with double reflecting band is induced to improve the absorbing efficiency of the pumping light. The single QW is replaced by the three narrow QWs This three QWs structure can add the quantum state of QW increase the recombination probability of carriers in the QWs and reduce the heat effect. The chemical etch equipment is also improved to control the surface unevenness to be within 50 nm.

Research on shaftless fast-steering mirror used in a precision tracking-aiming system (EI CONFERENCE) 会议论文 OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China
作者: Wang Y.; Guo J.; Guo J.; Wang Y.; Wang Y.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

Based on the analysis of principle of tracking and aiming system some important factors to design the structure of tracking-aiming system and the layout of optical system are discussed. Besides the paper gives the present developing situation of fast-steering mirror at home and abroad analyzes the advantages and disadvantages of FSM with axis and presents a novel design of flexible axis FSM. The main axis of composite axis system is tracked by motor to drive the frame and the sub-axis is tracked by voice coil motor (VCM) to drive FSM. The structure of FSM and designing principle of VCM are introduced and the emulation analyses of inherent frequency and deformation under load of the FSM with software COSMOS are also given.