中国科学院机构知识库网格系统: 检索

Multifunctional Anti-Alzheimer's Disease Effects of Natural Xanthone Derivatives: A Primary Structure-Activity Evaluation 期刊论文 OAI收割
FRONTIERS IN CHEMISTRY, 2022, 卷号: 10, 页码: 842208
作者: Hu, Xiaoyu; Liu, Chan; Wang, Kaichun; Zhao, Lanxue; Qiu, Yu

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收藏 | 浏览/下载：31/0 | 提交时间：2024/08/21

alpha-mangostin Alzheimer's disease multifunctional structure-activity neuroinflammation amyloid beta BETA-AMYLOID PEPTIDES BLOOD-BRAIN-BARRIER CENTRAL-NERVOUS-SYSTEM ALPHA-MANGOSTIN MICROGLIA OLIGOMERS AGGREGATION MODULATION PRODUCTS DESIGN

Dissipation-preserving simulation for Earth's free oscillations based on symplectic spectral-element method 期刊论文 OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2021, 卷号: 64, 期号: 11, 页码: 4022-4030
作者: Li BingFei; Li XiaoFan; Li Feng; Gong Fei

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收藏 | 浏览/下载：97/0 | 提交时间：2022/07/05

Earth's free oscillations Earth's interior structure Structure-preserving numerical modeling Non-conservative dynamical system Dispersive attenuation

Lateral Structural Variation of the Lithosphere-Asthenosphere System in the Northeastern to Eastern Iranian Plateau and Its Tectonic Implications 期刊论文 OAI收割
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2021, 卷号: 126, 期号: 1, 页码: 23
作者: Wu, Zimu; Chen, Ling; Talebian, Morteza; Wang, Xu; Jiang, Mingming

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收藏 | 浏览/下载：145/0 | 提交时间：2021/10/09

asthenospheric melting Iranain plateau lithospheric deformation mantle dynamics structure of lithosphere‐ asthenosphere system S‐ wave receiver function

Generalised semi-tensor product of matrices 期刊论文 OAI收割
IET CONTROL THEORY AND APPLICATIONS, 2020, 卷号: 14, 期号: 1, 页码: 85-95
作者: Cheng, Daizhan; Liu, Zequn; Xu, Zhenhui; Shen, Tielong

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收藏 | 浏览/下载：43/0 | 提交时间：2020/05/24

vectors tensors matrix algebra group theory linear S-system dynamic linear system matrix multiplier vector multiplier two kinds matrix-vector STPs standard STP consistent MM-STP MV-STP cross-dimensional linear system linear semigroup system quotient matrix space quotient vector space S-system structure quotient vector spaces inner-product cross-dimensional state space matrix-matrix STPs generalised semitensor product

Structural evolution study of additions of Sb2S3 and CdS into GeS2 chalcogenide glass by Raman spectroscopy 期刊论文 OAI收割
CHINESE PHYSICS B, 2017, 卷号: 26, 期号: 10
作者: Guo, Hai-Tao; Zhang, Ming-Jie; Xu, Yan-Tao; Xiao, Xu-Sheng; Yang, Zhi-Yong

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收藏 | 浏览/下载：38/0 | 提交时间：2017/12/25

Chalcogenide Glass Raman Spectroscopy Structure Ge-sb-cd-s System

BaFe2Se2O as an iron-based Mott insulator with antiferromagnetic order 期刊论文 OAI收割
PHYSICAL REVIEW B, 2012, 卷号: 86, 期号: 1
Han, F; Wan, XG; Shen, B; Wen, HH

收藏 | 浏览/下载：48/0 | 提交时间：2013/09/17

BA-FE-S ELECTRONIC-STRUCTURE SUPERCONDUCTIVITY DYNAMICS SYSTEM PNICTIDES LATTICE LAYERS

Adaptive control at launching using three loop autopilot (EI CONFERENCE) 会议论文 OAI收割
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
作者: Zhang Y.

收藏 | 浏览/下载：41/0 | 提交时间：2013/03/25

In order to guarantee the precise initial flight trajectory control the missile disturbance of large disturbance torque three loop adaptive autopilot was researched. The characteristics of the projectile and three loop autopilot instruction formation characteristics were analysed. From equivalent pitching angle of lateral acceleration feedback loop combined with the instruction of generalized error autopilot structure was simplified and three loop autopilot adaptive control law and stability were designed. The test data show that when disturbance torque was 600Nm the attitude angle generalized error was -4.4. In the time lasted about 15s late trajectory accuracy was within 1.0.Three loop autopilot adaptive control law was able to control the disturbance of initial trajectory and adapt to dynamic characteristics changes control system stability. It was the initial trajectory accurate solution method of flight. 2011 IEEE.

Structure optimization of strap-down inertial navigation system support (EI CONFERENCE) 会议论文 OAI收割
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
作者: Wang J.; Sun H.; Sun H.

收藏 | 浏览/下载：49/0 | 提交时间：2013/03/25

In order to meet the requirement of inertial navigation components and minimizing the system's weight and topological optimization was conducted. Then topological optimization and size optimization were conducted under conditions of random vibration and impact. Firstly according to the dynamic characteristics of missile and requirement of inertial navigation system the structure of inertial navigation support was designed according to types of missile connection and space arrangement of electronic components the method of transforming multi-loading cases to multi-loading constraints was used to optimizing the size of the support under conditions of random vibration and impact. Comparing to the original support structures RMS accelerations in installed points reduced by 25.2% under random vibration the weight of optimal structures reduced by 28.1% the structures also met the requirement of inertial navigation system under condition of impact. The support structure shows improvements in both dynamic characteristic and light weight comparing with the original one. 2011 IEEE.

Research on lightweight outer baffle for coaxial space camera (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
作者: Zhang L.; Zhang L.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

Stray light is non-imaging light that reach the optical system imaging plane. The non-imaging light can be received by detector if it is not effectively controlled and stray light which directly irradiates on the detector has great influence on the imaging quality. Stray light can be effectively inhibited if the outer baffle of space camera is designed optimally. Carbon fiber composite material is chosen as main material to meet requirements of a coaxial space optical system. The outer baffle should have advantages such as lightweight high stiffness and dimensional stability etc. Using optimization design tools the lightweight outer baffle is designed. And finite element method is used to check the structure. Development and test results show that the outer baffle with a diameter of 620mm and a total length of 1200mm only weighs 7.3kg. And the baffle's natural frequency reaches 88Hz and it can satisfy the requirements of the space camera. 2011 IEEE.

Research on computer control strategy for optical electric tracking system (EI CONFERENCE) 会议论文 OAI收割
2011 IEEE International Conference on Mechatronics and Automation, ICMA 2011, August 7, 2011 - August 10, 2011, Beijing, China
作者: Li M.

收藏 | 浏览/下载：37/0 | 提交时间：2013/03/25

In this paper mathematic model and computer control strategy for optical electrical tracking system have been researched and discussed. First the system's structure and its work process have been analyzed. Second according to the system's moving law the system's mathematic model has been built. As to the computer control strategy trigger guiding two closed loop PID control method as well as compound control method have been applied to satisfy the tracking accuracy. Third we apply the bilinear transformation to get the digital system and the sample time is 800Hz. The simulation results indicate that the maximum tracking error can be limited to less than 0.5 and the regulator time can be 0.04s. Then the control project resonance frequency should be more than 200Hz and the sample frequency should be more than 400Hz to meet the control accuracy requirement. So we can conclude that the system indexes such as swiftness high accuracy as long as real time have been satisfied. And the requirement of mechanical property has been present which is very useful to mechanical working. 2011 IEEE.