中国科学院机构知识库网格系统: 检索

Direct observation of the particle-phase bicyclic products from OH-initiated oxidation of 1,3,5-trimethylbenzene under NOx-free conditions 期刊论文 OAI收割
ATMOSPHERIC ENVIRONMENT, 2022, 卷号: 271
作者: Lin, Xiaoxiao; Tang, Xiaofeng; Wen, Zuoying; Long, Bo; Fittschen, Christa

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1,3,5-Trimethylbenzene The bicyclic peroxy radical Secondary organic aerosol Vacuum ultraviolet photoionization Aerosol mass spectrometry

Tighter polygamy relations for a superposition of the generalized W class state and vacuum beyond qubits 期刊论文 OAI收割
PHYSICS LETTERS A, 2020, 卷号: 384, 期号: 18, 页码: 5
作者: Shi, Xian

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收藏 | 浏览/下载：20/0 | 提交时间：2020/06/30

Polygamy relations A superposition of the generalized W class states and vacuum Linear entanglement of assistance

Analytic forms for cross sections of di-lepton production from e+e? collisions around the j/ψ resonance**supported by national natural science foundation of china (11275211) and istituto nazionale di fisica nucleare, italy 期刊论文 iSwitch采集
Chinese physics c, 2017, 卷号: 41, 期号: 8
作者: Zhou,Xing-Yu; Wang,Ya-Di; Xia,Li-Gang

收藏 | 浏览/下载：44/0 | 提交时间：2019/04/23

13.20.gd 13.66.de 13.66.jn Initial-state radiation Vacuum polarization E+e? collisions Di-lepton production The j/ψ resonance

Analytic forms for cross sections of di-lepton production from e(+) e(-) collisions around the J/psi resonance 期刊论文 OAI收割
CHINESE PHYSICS C中国物理. C, 2017, 卷号: 41, 期号: 8, 页码: 83001
作者: Zhou XY(周兴玉); Zhou, XY; Wang, YD; Xia, LG

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收藏 | 浏览/下载：35/0 | 提交时间：2019/08/27

initial-state radiation vacuum polarization e(+) e(-) collisions di-lepton production the J/psi resonance

An investigation of pore water pressure and consolidation phenomenon in the unfrozen zone during soil freezing 期刊论文 iSwitch采集
Cold regions science and technology, 2016, 卷号: 130, 页码: 21-32
作者: Zhang, Lianhai; Ma, Wei; Yang, Chengsong; Wen, Zhi

收藏 | 浏览/下载：50/0 | 提交时间：2019/05/09

Pore water pressure Vacuum-induced consolidation Frost heaving stress Water expulsion The unfrozen zone Frost heave

Design and experimental research of a new type focus mechanism used in space-based telescope (EI CONFERENCE) 会议论文 OAI收割
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
作者: Wang D.

收藏 | 浏览/下载：39/0 | 提交时间：2013/03/25

The position of focal plane will be changed because of temperature fluctuation and vacuum environment. In order to make the telescope work well positioning accuracy of the mechanism is 0.008mm. The performance satisfies the need of precision a focusing mechanism is needed. To majority of large space-based telescopes and the scheme design is reasonable and practicable. 2012 IEEE. the general way to do this would be to use a reflector which was located in the backfocal distance. One of typical schemes of this mechanism was introduced however because of the big axial size the mechanism can't be used when the size of the enclosure was limited. A new type of focusing mechanism was introduced which has such advantages of small size high accuracy and low mass. The design and test methods had been discussed. According to the results the repeatability positioning accuracy is 0.0025mm

Design of controlling system in multi-function durability testing device for vehicle vacuum booster with brake master cylinder (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Mechanical and Electronic Engineering, ICMEE 2012, June 23, 2012 - June 24, 2012, Hefei, China
Hao X.; Zhang R.; Li X.; Wang M.

收藏 | 浏览/下载：40/0 | 提交时间：2013/03/25

The quality of vehicle vacuum booster with brake master cylinder is related to the safe of drivers and automobiles. The testing experiment must be executed strictly before leaving factory based on the national standards.The paper introduces the controlling system of multi-function durability testing device which is designed for doing durable testing experiments and Anti-lock braking system (ABS) performance experiments. The structure and theory of device is presented. The controlling system is illuminated in detail. To test the dynamic property this system was identified by a recursive BP neural network. According to the character of a great deal of sensors and actuators the high precision capabilities and reliability the distributed control mode (DCS) including the computer and PLC by RS-485 bus is utilized. The four channels testing experiments are achieved at the same time. The test data is directly memorized into the computer. The results of general endurance and ABS endurance testing experiments are shown to demonstrate the excellent performance of the testing device. 2012 Springer-Verlag Berlin Heidelberg.

The investigation of point defect modes of phononic crystal for high Q resonance (EI CONFERENCE) 会议论文 OAI收割
2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11, June 5, 2011 - June 9, 2011, Beijing, China
作者: Liu J.; Liu J.; Liu J.; Li F.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

Point defect cavity was constructed in a two-dimensional phononic crystal plate. It was excited by a small piezo chip in the cavity and the vibration of each point defect modes were detected by an optical interferometer. Point defect modes on 2D PC plate in vacuum air and loaded with water were investigated theoretically and experimentally to make clear of Q factors which are affected by inner attenuation band gap effects and medium. The way to get high Q resonance has been found. It helps to design a new kind of resonator or sensor. 2011 IEEE.

Study on spectrograph for ionosphere: A broadband imaging instrument prototype for far-ultraviolet (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者: Wang S.-R.; Lin G.-Y.; Yu L.

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Current research on space-based exploration for the ionosphere needs more advanced technologies. Because the spectral signals in the ionosphere distributing basically in the far-ultraviolet waveband are very weak. Usual spectrometer structures and detectors such as CCD can't receive enough information. Based on this principle of atmospheric sounding the imaging spectrometer prototype for ionosphere detection application was designed to solve the problem. This prototype consists of the telescope and the imaging spectrometer. The simple structure and small number of mirrors can help higher transmission efficiency be achieved and weak signals detection be implemented. The telescope is an off-axis parabolic mirror and the spectrometer is a modified Czerny-Turner spectral imaging system. Modified Czerny-Turner spectrometer contains a spherical mirror a fixed plane grating and a toroidal mirror. By adjusting the incident angle to the collimating mirror and using toroidal mirror coma and astigmatism were corrected well. We also optimize distances between the grating to the focusing mirror and the focusing mirror to the image plane to improve disadvantages of traditional Czerny-Turner structure. Designed results demonstrate that aberrations are substantially corrected and high image quality can be obtained in broad waveband. The photon counting Wedge-Strip-Anode detector with micro-channel planes as the receiving plane is accepted for the instrument prototype. The other photon counting 2-D detector responding well for weak light such as Cross-Delay line detector and MAMA detector can also be used for detection. The calibration and performances testing system is made of a vacuum system a deuterium lamp a monochrometer and the instrument prototype. Results obtained from the experiment show that the spectral resolution is 2.4 nm and the spatial resolution is 80 m. The other calibration experiments are running. The technology of the spectrometer prototype is important for the research and applications of ionosphere remote sensing. 2011 SPIE.

Electronic system design of ultraviolet ozone vertical profile probe for aerography satellite (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
Song K.; Wang S.

收藏 | 浏览/下载：20/0 | 提交时间：2013/03/25

The design of ultraviolet ozone vertical profile probe is illustrated and the electronic system is introduced in detail. The device is a compact high precision ultraviolet-vacuum ultraviolet spectral radiometer and is used to measure atmospheric solar backscattering spectral radiance and solar spectral irradiance. Noise of the system is analyzed and Numeric accumulation and synchronous demodulation was used to decrease the noise and the zero-drift of the instrument. The solar irradiance at altitude 830 km in 160-400 nm and the backscattering solar spectral radiance in the ultraviolet ozone absorption band at 12 wavelengths from 250 nm to 340 nm are obtained. Test results on orbit show that all the requested function is met successfully and the performance is stable. 2011 IEEE.