中国科学院机构知识库网格系统: 检索

Modelling of regional heating and cooling load in the context of carbon neutrality 期刊论文 OAI收割
JOURNAL OF BUILDING ENGINEERING, 2024, 卷号: 85, 页码: 26
作者: Pan LS(潘利生); Guo, Yuan; Yan, Quanying; Shi, Weixiu

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收藏 | 浏览/下载：30/0 | 提交时间：2024/05/14

Regional load Coupling of heating and cooling Degree-day method Characteristics of load

Geometrical characteristic investigation of the Baihetan irregular columnar jointed basalt and corresponding numerical reconstruction method 期刊论文 OAI收割
JOURNAL OF CENTRAL SOUTH UNIVERSITY, 2022, 卷号: 29, 期号: 2, 页码: 455
作者: Zhang, Jian-cong; Jiang, Quan; Feng, Guang-liang; Li, Shao-jun; Pei, Shu-feng

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收藏 | 浏览/下载：12/0 | 提交时间：2023/08/02

columnar jointed basalt geometrical characteristics degree of irregularity numerical construction modified Voronoi polygon method

Design of back-streaming white neutron beam line at csns 期刊论文 iSwitch采集
Applied radiation and isotopes, 2018, 卷号: 132, 页码: 212-221
作者: Zhang, L. Y.; Jing, H. T.; Tang, J. Y.; Li, Q.; Ruan, X. C.

收藏 | 浏览/下载：69/0 | 提交时间：2019/04/23

Back-streaming white neutrons Time-of-flight (top) method Neutron characteristics Neutron beam collimation Neutron and gamma background

Design of back-streaming white neutron beam line at CSNS 期刊论文 OAI收割
APPLIED RADIATION AND ISOTOPES, 2018, 卷号: 132, 页码: 212-221
作者: Ning CJ(宁常军); Ruan, XC; Li Q(李强); Tang JY(唐靖宇); Jing HT(敬罕涛)

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收藏 | 浏览/下载：52/0 | 提交时间：2019/09/24

Back-streaming white neutrons Time-of-flight (TOP) method Neutron characteristics Neutron beam collimation Neutron and gamma background

烟台夹河口外柱状沉积物还原性无机硫、活性铁的变化特征及其相互关系 期刊论文 OAI收割
海洋科学, 2018, 卷号: 42, 期号: 8, 页码: 90-97
作者: 姜明; 赵国强; 李兆冉; 盛彦清

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收藏 | 浏览/下载：26/0 | 提交时间：2020/07/08

还原性无机硫活性铁深层柱状沉积物硫化度矿化度 Reduced inorganic sulfur Reactive iron Deep core sediments Degree of pyritization Degree of sulfidity The distribution characteristics and coupling mechanism of reduced inorganic sulfur (RIS)and reactive iron in marine core sediments are closely related to the evolution of environment quality.In this study,an improved cold diffusion method and hydrochloric acid extraction method were applied to the acid-volatile sulfur (AVS),pyrite sulfur (CRS),elemental sulfur (ES),and reactive iron [Fe (Ⅱ)and Fe (III)] analyses.The distribution characteristics and coupling mechanism of S and Fe were investigated based on a core sediment 4 meters deep collected in the northern sea area of the mouth of Jiahe River,Yantai.The results showed that the RIS in sediments was dominated by CRS,followed by AVS and ES.The content of AVS presented a narrow range with depth,whereas the CRS and ES were higher at the top and bottom layers than the middle layer reactive iron was dominated by Fe (II),which increased with depth,while Fe (Ⅲ)gradually decreased with depth.Most of the Fe (III)was reduced to the disssolved Fe(II),which was combined with the soluble H_2S of the sulfate-reducing bacteria to produce CRS and ES in the deep layer,resulting in their accumulation at the bottom of core sediments.Furthermore,this study showed that reactive iron was not a limiting factor for the accumulation of RIS with lower degree of pyritization and degree of sulfidity.

Preliminary study on CAD-based method of characteristics for neutron transport calculation 期刊论文 OAI收割
chinese physics c, 2014, 卷号: 38, 期号: 5, 页码: 1-7
作者: CHEN Zhen-Ping; ZHENG Hua-Qing; SUN Guang-Yao; SONG Jing; HAO Li-Juan

收藏 | 浏览/下载：17/0 | 提交时间：2016/01/05

method of characteristics neutron transport calculation CAD geometry modeling

Structural design of primary mirror subassembly for space telescope (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Mechatronics and Applied Mechanics, ICMAM 2012, December 8, 2012 - December 9, 2012, Taiwan
作者: Xu H.

收藏 | 浏览/下载：63/0 | 提交时间：2013/03/25

In order to design a large aperture primary mirror with the diameter of 1150 mm the parameters impacting on gravity deformation of the mirror were analyzed and discussed in detail including material selection diameter-thickness ratio the number of the support points location selection and lightweight structure etc. A novel space mirror structure system was put forward and its back was opened and supported by six points on back. The dynamic and static and thermal characteristics were analyzed based on the finite element method. Analysis results showed the surface figure accuracy reached to RMS 14.5nm under the action of gravity load along the optical axis direction and the first-order natural frequency was 214Hz which met to the designed indexes requirements. (2013) Trans Tech Publications Switzerland.

Structural amelioration of 920 nm optically pumped semiconductor vertical external-cavity surface emitting laser (OPS-VECSEL) (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Energy, Environment and Sustainable Development, EESD 2012, October 12, 2012 - October 14, 2012, Jilin, China
作者: Liu Y.; Liu Y.; Wang L.; Wang L.; Wang L.

收藏 | 浏览/下载：20/0 | 提交时间：2013/03/25

920 nm optically pumped semiconductor vertical external-cavity surface emitting laser (OPS-VECSEL) has an important application in laser display. We constructed and optimized a 920 nm OPS-VECSEL with active region of In0.09Ga0.91As quantum well (QW) system pumped by 808 nm laser diode module. By the finite element method self-consistent solutions of the semiconductor electronic and optical equations are realized to calculate the characteristics parameters of OPS-VECSEL. The performances of device especially the mode the threshold and the optical-optical translation efficiency were analyzed by dealing with different number of QWs (1 2 and 3) in one period QW depth barrier width the component and dimension of the non-absorption layer. We chose an improved structure of them. On this basis we ameliorated the number of QW periods and the simulation showed that in order to obtain high performance device the choice of the number of QW periods must be cautious. (2013) Trans Tech Publications Switzerland.

New Analysis Method for Slope Stability Considering Force-Vector Characteristics 期刊论文 OAI收割
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 2013, 卷号: 139, 期号: 10, 页码: 1813-1816
作者: Wu, Zhenjun

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收藏 | 浏览/下载：25/0 | 提交时间：2018/06/05

Slope stability Safety Finite element method Computer software Slope stability Factor of safety Vector characteristics Safety definition Slice method Spreadsheet Finite element method

The application of adaptive enhancement algorithm based on gray entropy in mammary gland CR image (EI CONFERENCE) 会议论文 OAI收割
2012 2nd International Conference on Consumer Electronics, Communications and Networks, CECNet 2012, April 21, 2012 - April 23, 2012, Three Gorges, China
Zhang M.-H.; Zhang Y.-Y.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

Mammary gland is composed entirely of soft tissue with approximate density therefore mammary gland CR medicine radiation image presents a low contrast and slight difference changes may be a manifestation of tumor so it is necessary to enhance mammary gland CR image to improve its visual quality in order to meet the demands of doctor's clinical diagnosis. However the general enhancement algorithms over enhance the contrast and noise due to image details lost aiming at the defects a mammary gland CR medicine image adaptive enhancement arithmetic based on image gray entropy is put forward. The arithmetic adapts dizzy image to magnify selected spatial frequency response in order to enhance the edge details of mammary gland CR images. It can adjust weighted factor K according to image gray characteristics namely pixel gray entropy. Experiments results demonstrate that mammary gland CR image enhanced by the algorithm has abundant details and high signal-to-noise ratio moreover CR image enhanced has good visual effect. So the method is effective and fit for enhancing CR medical radiation image edge details. 2012 IEEE.