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Design and technology review of the solar X-ray detector onboard the Macao Science Satellite-1B

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Science China Technological Sciences 2024年第11期67卷 3365-3380页

作者： ZUO FuChang SHI YongQiang CHEN JianWu ZHANG XiaoPing FU WeiChun CHANG Ye GAI FangQin liU SiYuan XIONG Yan ZHANG Haili SUN Yan WANG li ZHENG Ran li liansheng MEI ZhiWu HUANG He ZHA GangQiang ZHANG KeKe Space Optoelectronic Measurement and Perception Lab. Beijing Institute of Control Engineering State Key Laboratory of Lunar and Planetary Sciences Macau University of Science and Technology School of Astronautics Northwestern Polytechnical University Key Laboratory of Radiation Detection Materials and Devices Northwestern Polytechnical University Research and Development Institute of Northwestern Polytechnical University in Shenzhen

On May 21, 2023, the Macao Science Satellite-1B(MSS-1B), a low-inclination, low-latitude, and high-precision scientific exploration satellite for geomagnetic fields and space environments, was successfully launched. The solar X-ray detector(SXD),one of the two major scientific payloads onboard the MSS-1B, has obtained a large amount of solar X-ray radiation data, which reveals the distribution law of the magnetic field in the low Earth orbit, as well as the coupling law of the Earth's magnetic field and the solar radiation and energy particle distributions. First, the overall design of the multi-detection-unit, broad-energy-range,small-volume, and low-power SXD was implemented to achieve the scientific objectives of the mission. Second, the technical indicators of the instrument were decomposed into various components, and the key technologies, such as collimator, processing circuit, thermal, and payload dataset designs, were reviewed. Third, the backgrounds, including electronic noise, cosmic diffuse X-ray background, and high-energy background in the Earth's radiation belts in and out of the field of view, were analyzed for the instrument. Then, the ground calibrations of the energy response, detection efficiency, and temperature-dependent peak drift of the SXD flight model were conducted. Finally, the in-orbit temperature, energy spectrum data, background, and solar flare process observation of the instrument in the in-orbit test stage are presented, verifying the instrument design, analysis, and ground calibration, providing a foundation for obtaining accurate solar X-ray radiation data, and achieving the scientific objectives of the satellite.

关键词： Macao Science Satellite-1B solar X-ray detector design and development solar flare technology review

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Status and prospect of garnet/polymer solid composite electrolytes for all-solid-state lithium batteries

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Journal of Energy Chemistry 2020年第11期29卷 154-177页

作者： liansheng li Yuanfu Deng Guohua Chen The Key Laboratory of Fuel Cell for Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640GuangdongChina Electrochemical Energy Engineering Research Center of Guangdong Province South China University of TechnologyGuangzhou 510640GuangdongChina Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Solid polymer electrolytes(SPEs), such as polyethylene oxide(PEO), are characteristic of good flexibility and excellent processability, but they suffer from low ionic conductivity and small li+transference number at ambient temperature. Inorganic solid electrolytes(ISEs), garnet-type li7La3Zr2O12 and its derivatives(LLZO-based) in particular, possess high ionic conductivity at room temperature, wide electrochemical stability window, large li+transference number as well as good stability against li metal ***, lithium dendrites growth, interfacial contact issue and brittle nature of LLZO-based ceramic electrolytes prevent their practical applications. In response to these shortcomings, LLZO-based/polymer solid composite electrolytes(SCEs), taking complementary advantages of two kinds of electrolytes, and thus simultaneously improving the electrode wettability, ionic conductivity and mechanical strength, have been made to develop high-performance SCEs in recent years. Herein, the intrinsic properties and research progress of LLZO-based/polymer SCEs, including LLZO-based/PEO SCEs(LLZO-based/PEO SCEs with uniform dispersion of LLZO-based fillers and LLZO-based/PEO layered SCEs) and LLZO-based/novel polymers SCEs, are summarized. Besides, comprehensive updates on their applications in solid-state batteries are also presented. Finally, challenges and perspectives of LLZO-based/polymer SCEs for advanced allsolid-state lithium batteries(ASSLBs) are suggested. This review paper aims to provide systematic research progress of LLZO-based/polymer SCEs, to allow for more efficient and target-oriented research on improving LLZO-based/polymer SCEs.

关键词： Solid polymer electrolyte Garnet-type electrolyte Solid composite electrolyte All-solid-state battery

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微型滚动转子压缩机摩擦损失的分析

制冷学报 2024年第5期45卷 63-70,83页

作者：孙效航杨启超史本林陈沐清李连生青岛科技大学机电工程学院青岛266061

针对微型滚动转子压缩机,建立滑片、滚动转子等重要部件的运动与受力分析数学模型。根据主要摩擦副摩擦损失的计算式,分析微型滚动转子压缩机主要摩擦副摩擦损失的占比,并与常规空调用滚动转子压缩机的摩擦损失分布情况进行对比,探讨了... 详细信息

针对微型滚动转子压缩机,建立滑片、滚动转子等重要部件的运动与受力分析数学模型。根据主要摩擦副摩擦损失的计算式,分析微型滚动转子压缩机主要摩擦副摩擦损失的占比,并与常规空调用滚动转子压缩机的摩擦损失分布情况进行对比,探讨了排气压力和结构参数对压缩机主要摩擦副摩擦损失的影响规律。结果表明:相比于常规空调用滚动转子压缩机,微型滚动转子压缩机的转子自转速度更快,滑片与滑片槽的摩擦损失占比升高了9.5%,主副轴承的摩擦损失占比减小了16.1%。微型滚动转子压缩机排气压力从1070 kPa提高至1470 kPa,总摩擦功耗升高了13.5%。微型滚动转子压缩机滑片厚度从1 mm提高至3 mm,总摩擦功耗仅升高3.1%。微型滚动转子压缩机偏心率从0.08提高至0.18,总摩擦功耗升高了69.7%。微型滚动转子压缩机长径比从0.25提高至0.5,总摩擦功耗降低了10%。微型滚动转子压缩机的偏心率合适的取值范围在0.08~0.18。研究结果可为微型滚动转子压缩机的设计及结构参数优化提供参考。

关键词：微型滚动转子压缩机运动分析受力分析数学模型摩擦损失

liF and liNO_(3) as synergistic additives for PEO-PVDF/LLZTO-based composite electrolyte towards high-voltage lithium batteries with dualinterfaces stability

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Journal of Energy Chemistry 2022年第2期31卷 319-328页

作者： liansheng li Yuanfu Deng Huanhuan Duan Yunxian Qian Guohua Chen The Key Laboratory of Fuel Cell for Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640GuangdongChina Electrochemical Energy Engineering Research Center of Guangdong Province South China University of TechnologyGuangzhou 510640GuangdongChina Shenzhen CAPCHEM Technol Co Ltd. Shenzhen 518118GuangdongChina Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Solid electrolytes with desirable properties such as high ionic conductivity,wide electrochemical stable window,and suitable mechanical strength,and stable electrode-electrolyte interfaces on both cathode and anode side are essential for high-voltage all-solid-state lithium batteries(ASSLBs)to achieve excellent cycle *** this work,a novel strategy of using liF and liNO_(3) as synergistic additives to boost the performance of PEO-PVDF/LLZTO-based composite solid electrolytes(CSEs)is developed,which also promotes the assembled high-voltage ASSLBs with dual-interfaces stability ***,liF as an inactive additive can increase the electrochemical stability of the CSE under high cut-off voltage,and improve the high-voltage compatibility between cathode and CSE,thus leading to a stable cathode/CSE ***_(3) as an active additive can lead to an enhanced ionic conductivity of CSE due to the increased free-mobile li+and ensure a stable CSE/li interface by forming stable solid electrolyte interphase(SEI)on li anode *** from the improved performance of CSE and stable dualinterfaces,the assembled NCM622/9[PEO_(15)-liTFSI]-PVDF-15 LLZTO-2 liF-3 liNO_(3)/li cell delivers a high rate capacity of 102.1 mAh g^(-1) at 1.0 C and a high capacity retention of 77.4%after 200 cycles at 0.5 C,which are much higher than those of the ASSLB assembled with additive-free CSE,with only 60.0 mAh g^(-1) and 52.0%,***,novel cycle test modes of resting for 5 h at different charge states after every 5 cycles are designed to investigate the high-voltage compatibility between cathode and CSE,and the results suggest that liF additive can actually improve the high-voltage compatibility of cathode and *** the obtained results confirm that the strategy of using synergistic additives in CSE is an effective way to achieve high-voltage ASSLBs with dual-interfaces stability.

关键词： Synergistic additives Composite solid electrolyte Dual-interfaces stability High-voltage cathode lithium metal battery

Frequency steering of spaceborne clocks based on XPNAV-1 observations

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Chinese Journal of Aeronautics 2023年第6期36卷 266-278页

作者： Mengna HAN Minglei TONG liansheng li Yongqiang SHI Tinggao YANG Yuping GAO National Time Service Center Chinese Academy of SciencesXi'an 710600China Schoolof Astronomy and Space Science University of Chinese Academy of SciencesBejing 100049China Beijing Institute of Control Engineering Beijing 100190China

Due to high stable rotations, timing of pulsars provides a natural tool to correct the frequency deviation of spaceborne atomic clocks. Based on processing the observational data about a year of Crab pulsar given by XPNAV-1 satellite, we study the possibility of correcting the frequency deviation of spaceborne atomic clocks using pulsar timing. According to the observational data in X-ray band and the timing model parameters from radio observations, the pre-fit timing residuals with a level of 67.66 μs are obtained. By fitting the slope of the timing residuals affected by the faked frequency-biased reference clock, we estimated successfully the relative frequency deviation of the reference clock. For a satellite clock with frequency deviation of the order about 10^(-12), a calibration accuracy with relative error of about 2% can be obtained from the Crab pulsar’s data for one *** stability of the time scale based on Crab pulsar is about 10^(-12) for an interval of one year.

关键词： Pulsar time scale Pulsar timing Atomic clock Frequency steering X-ray observation

Leaching of vanadium from stone coal with sulfuric acid

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Rare Metals 2009年第1期28卷 1-4页

作者： WANG Mingyu XIAO liansheng li Qinggang WANG Xuewen XIANG Xiaoyan School of Metallurgical Science and Engineering Central South University Changsha 410083 China

The effects of roasting, mass ratio of H2SO4 to stone coal, leaching temperature, liquid-to-solid ratio, grinding fineness of stone coal, and two-stage counter-current leaching on the vanadium leaching ratio were studied. The results show that the vanadium leaching ratio of roasted stone coal through two-stage counter-current leaching can reach 65.1% at the mass ratio of H2SO4 to stone coal of 20%, leaching temperature of 95℃, leaching time of 30 h, liquid-to-solid ratio of 1.1 mL·g^-1, and grinding fineness of 0.1 mm, which can serve as an experimental basis for the production of vanadium from stone coal.

关键词： stone coal vanadium sulfuric acid leaching

Copper Removal from Molten Steel by Gasification

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Journal of Iron and Steel Research International 1999年第2期6卷 10-13页

作者： li liansheng li Shiqi Xiang Changxiang Cao Jie liu Keming li Suqin University of Science and Technology Beijing

A novel method is proposed to enhance the gasification and removal of copper from molten steel by adding ammonium salts or urea into molten steel under normal *** decopperization experiments were conducted in a molybdenum-wire resistance furnace at 1 873 *** copper content of about 400 g of a mild steel was reduced from 0.49%(mass fraction,the same below) and 0.51% to 0.31% and 0.38% using 0.7 g of NHC1 and 0.5 g of(NH)COrespectively,while the copper content of the molten steel was reduced from 0.61%to 0.56% using 2.00 g of NHCONH.

关键词： molten steel copper removal ammonium salt

Fast period estimation of X-ray pulsar signals using an improved fast folding algorithm

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Chinese Journal of Aeronautics 2023年第10期36卷 309-316页

作者： Minzhang SONG Yidi WANG Wei ZHENG liansheng li Yusong WANG Xiaowei HU Yulong WU College of Aerospace Sciences and Engineering National University of Defense TechnologyChangsha 410073China Unit 71770 of PLA Taian 271000China Beijing Institute of Control Engineering Beijing 100076China

An accurate period is important to recover the pulse profile from a recorded photon event series of an X-ray pulsar and to estimate the pulse time of arrival,which is the measurement of X-ray pulsar *** folding is a classical period estimation method in the time domain;however,its computational complexity grows as the number of trail periods *** order to reduce the computational complexity,this paper improves the fast folding algorithm through segment correlation and amplitude accumulation,which is based on the post-order traversal of a binary *** with epoch folding,the improved fast folding algorithm can achieve a similar accuracy at the cost of a lower computational *** with the original fast folding algorithm,the improved algorithm can be applied to detectors with a much smaller effective *** performance of the method is investigated by simulation data and observation data from the Neutron star Interior Composition Explorer(NICER).

关键词： Epoch folding Fast folding algorithm Pulsar spin period Phase estimation X-ray pulsar

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球形泵变转速下空化特性及性能分析

机电工程 2024年第3期41卷 512-519,539页

作者：乔家辉杨艳艳王陆一刘广彬李连生青岛科技大学机电工程学院山东青岛266061 深圳市中安动力科技有限公司广东深圳518000

球形泵是机电产品中的一种新型结构泵,空化现象仍然是影响水泵性能的重要因素。针对球形泵在工作时因转速所导致的空化问题,对变转速下的球形泵的空化特性及性能进行了研究。首先,采用计算流体动力学方法,并运用动网格技术,模拟了球形... 详细信息

球形泵是机电产品中的一种新型结构泵,空化现象仍然是影响水泵性能的重要因素。针对球形泵在工作时因转速所导致的空化问题,对变转速下的球形泵的空化特性及性能进行了研究。首先,采用计算流体动力学方法,并运用动网格技术,模拟了球形水泵的内部流场;然后,根据模拟仿真结果分析了转速对工作腔内空化过程的影响,获得了水泵容积效率的变化规律;最后,根据模拟结果对球形泵吸液口进行了改进。研究结果表明:球形泵工作时产生的空化现象主要发生在吸液阶段;在吸液初期与末期,较小的吸液口面积会造成工作腔内的液体压力迅速下降,吸液孔口附近和工作腔中部区域发生较明显空化;高转速时,较大的工作腔容积变化率导致空化加剧,容积效率先增大后减小;当转速为500 r/min~3000 r/min时,吸液末期腔内空化体积分数为1.01%~8.08%,球形泵容积效率为91.16%~85.51%;改善吸液口可以增大进液通道的有效工作面积,容积效率由85.51%提高至90.15%。该研究可为新型球形泵的优化设计提供参考。

关键词：容积泵球形泵空化现象数值模拟变转速工况容积效率计算流体动力学