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First observation results of Macao Science Satellite-1 on lightning-induced electron precipitation

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Science China Earth Sciences 2025年第1期 1-10页

作者： Yongping WANG Yixin SUN Qiugang ZONG Gaopeng LU Xudong GU ze-Jun HU Bin li Key Laboratory for Polar Science Ministry of Natural Resources Polar Research Institute of China Institute of Space Physics and Applied Technology Peking University State Key Laboratory of Lunar and Planetary Science Macau University of Science and Technology School of Earth and Space Sciences University of Science and Technology of China School of Electronic Information Wuhan University

The Medium-energy Electron Spectrometers(MES) is a space-borne instrument onboard Macao Science Satellite-1(MSS-1) dedicated to monitoring the typical charged particle radiation characteristics in the satellite orbit and the process of their occurrence and development, including short bursts of lightning-induced electron precipitation(LEP).This paper presents the first results of the LEP measurements by the MSS-1.47 LEP events are identified with the routine operation for 3 months since satellite launch, all within the range of 1.5lightning discharges are definitively geo-located for these LEP *** LEP events occur within lightning and consist of 40–300 keV electrons.A preliminary observation result indicates that, with medium-energy electron detectors, MSS-1can present in-situ observations of large regions of enhanced background precipitation and reveal their fine spatiotemporal characteristics and spectral *** collaborative VLF ground-based measurements at the Great Wall Station, Antarctica also have a good correspondence with LEP measurements of *** observations also imply that lightning activity has a modulation effect on the energetic electron energy-spatial structure.

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Potential Benefits of Green Tea in Prostate Cancer Prevention and Treatment:A Comprehensive Review

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Chinese Journal of Integrative Medicine 2024年第11期30卷 1045-1055页

作者： liU Gui-hong YAO ze-qin CHEN Guo-qiang li Ya-lang liANG Bing Department of Urology Sanya Central Hospital(The Third People's Hospital of Hainan Province)Sanya CityHainan Province 572000China Department of Urology Yuzhou People's HospitalXuchang CityHenan Province 461670China

Prostate cancer is a prevalent and debilitating disease that necessitates effective prevention and treatment *** tea,a well-known beverage derived from the Camellia sinensis plant,contains bioactive compounds with potential health benefits,including catechins and *** comprehensive review aims to explore the potential benefits of green tea in prostate cancer prevention and treatment by examining existing *** tea possesses antioxidant,anti-inflammatory,and anti-carcinogenic properties attributed to its catechins,particularly epigallocatechin *** studies have reported an inverse association between green tea consumption and prostate cancer risk,with potential protection against aggressive forms of the *** studies demonstrate that green tea components inhibit tumor growth,induce apoptosis,and modulate signaling pathways critical to prostate cancer development and *** trials and human studies further support the potential benefits of green *** tea consumption has been found to be associated with a reduction in prostate-specific antigen levels,tumor markers,and played a potential role in slowing disease ***,challenges remain,including optimal dosage determination,formulation standardization,and conducting large-scale,long-term clinical *** review suggests future research should focus on combinatorial approaches with conventional therapies and personalized medicine strategies to identify patient subgroups most likely to benefit from green tea interventions.

关键词： green tea prostate cancer prevention treatment epigallocatechin gallate review

Deformation and phase transformation mechanisms of 40Cr10Si2Mo steel during hot compression

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Journal of Iron and Steel Research International 2023年第4期30卷 760-771页

作者： qing-juan Wang qin-ren Wang Zhong-ze Du ze-en He Xue Dang ze-jiang Qi Cong-cong Yang School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055ShaanxiChina

Thermo-mechanical experiments on martensitic heat-resistant 40Cr10Si2Mo steel were conducted using a Gleeble simulator in temperature and strain rate ranges of 1073–1373 K and 0.1–20 s^(-1),*** maps were developed and correlated with deformed microstructures based on the dynamic material model *** analysis of the maps revealed that both applied temperature and strain rate had significant effects on the power dissipation efficiency and flow instability of the steel *** backscatter diffraction analysis was also implemented to study the effect of deformation conditions on martensitic *** results showed that higher temperatures and strain rates led to a fine martensitic packet,and the martensite lath increased in width at high *** deformation domains,which exhibit different recrystallization processes,were *** discontinuous dynamic recrystallization(DRX)mechanism in the low strain rate domain was characterized by the migration and growth of high-angle grains during *** contrast,in the high strain rate domain,the development of new grain boundaries is primarily associated with the deformation microbands in the low-temperature deformation *** the temperature increased,the high dislocation density accelerated the migration of the grain ***,the DRX mechanism changed from continuous DRX to *** change in the DRX mechanism type was attributed to the time during which the sample remained high temperature after deformation.

关键词： 40Cr10Si2Mo steel Dynamic recrystallization DRX mechanism Grain boundary Dislocation density

Genus two correlation functions in CFTs with TT deformation

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Science China(Physics,Mechanics & Astronomy) 2023年第5期66卷 106-119页

作者： Song He Yun-ze li Center for Theoretical Physics and College of Physics Jilin UniversityChangchun 130012China Max Planck Institute for Gravitational Physics(Albert Einstein Institute) Am Mühlenberg 114476 GolmGermany

Since the definition of TT deformation in the curved Riemann surface is obstructive in the literature,we propose a way to do the deformation in the genus two Riemann surfaces by sewing *** construct the correlation functions of conformal field theories(CFTs)on genus two Riemann surfaces with the TT deformation in terms of the perturbative CFT *** to sewing construction to form higher genus Riemann surfaces from lower genus ones and conformal symmetry,we systematically obtain the first-order TT correction to the genus two correlation functions in the TT deformed CFTs,e.g.,partition function and one/higher-point correlation functions.

关键词： conformal field theory gauge/gravity duality TT deformation higher genus correlation function

Artificial nerve graft constructed by coculture of activated Schwann cells and human hair keratin for repair of peripheral nerve defects

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Neural Regeneration Research 2023年第5期18卷 1118-1123页

作者： Han-Jun qin Hang li Jun-ze Chen Kai-Rui Zhang Xing-Qi Zhao Jian-Qiang qin Bin Yu Jun Yang Department of Orthopedics Nanfang HospitalSouthern Medical UniversityGuangdong Provincial Key Laboratory of Bone and Cartilage Regenerative MedicineNanfang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina Hebei Medical University ShijiazhuangHebei ProvinceChina Department of Orthopedics Baiyun Branch of Southern HospitalGuangzhouGuangdong ProvinceChina Department of Anatomy School of Basic Medical SciencesSouthern Medical UniversityGuangzhouGuangdong ProvinceChina Department of Orthopedics The 74th Group Military Hospital of PLAGuangzhouGuangdong ProvinceChina

Studies have shown that human hair keratin(HHK) has no antigenicity and excellent mechanical properties. Schwann cells, as unique glial cells in the peripheral nervous system, can be induced by interleukin-1β to secrete nerve growth factor, which promotes neural regeneration. Therefore, HHK with Schwann cells may be a more effective approach to repair nerve defects than HHK without Schwann cells. In this study, we established an artificial nerve graft by loading an HHK skeleton with activated Schwann cells. We found that the longitudinal HHK microfilament structure provided adhesion medium, space and direction for Schwann cells, and promoted Schwann cell growth and nerve fiber regeneration. In addition, interleukin-1β not only activates Schwann cells, but also strengthens their activity and increases the expression of nerve growth factors. Activated Schwann cells activate macrophages, and activated macrophages secrete interleukin-1β, which maintains the activity of Schwann cells. Thus, a beneficial cycle forms and promotes nerve repair. Furthermore, our studies have found that the newly constructed artificial nerve graft promotes the improvements in nerve conduction function and motor function in rats with sciatic nerve injury, and increases the expression of nerve injury repair factors fibroblast growth factor 2 and human transforming growth factor B receptor 2. These findings suggest that this artificial nerve graft effectively repairs peripheral nerve injury.

关键词： artificial nerve graft bioactive human hair keratin interleukin-1β macrophages nerve graft nerve growth factor nerve repair peripheral nervous injury Schwann cells

Adaptive robust control for triple avoidance - striking - arrival performance of uncertain tank mechanical systems

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Defence Technology（防务技术） 2022年第8期18卷 1483-1497页

作者： Zong-fan Wang Guo-lai Yang Xiu-ye Wang qin-qin Sun Yu-ze Ma The School of Mechanical Engineering Nanjing University of Science and TechnologyJiangsuPeople's Republic of China

This paper puts forward an unprecedented avoidance-striking-arrival problem aiming to address the need for tank's uncertain mechanical systems on the intelligent *** associated system uncertainties(possibly rapid)are time-varying but bounded(possibly unknown).The goal is to design a controller that enables the tank to aim at and attack the enemy tank while keeping itself(out of the enemy fire zone).The tank maintains this condition until reaching the predefined *** this paper,an approximate constraint following control method is adopted to solve this problem,and the original constraints are creatively divided into two categories:the avoidance-tracking constraint and the striking-arrival *** adaptive robust control method is proposed and consequently verified through simulation *** is proved that the system fully obeys the avoidance-tracking-constraint and strictly obeys the striking-arrival constraint under the control ***,the control of the tank vehicle running system and tank gun bidirectional stabilization system are unified to deal with the control signal delay caused by complex uncertainties on the ***,this paper reduced the delay of signal transmission in the system while solved the avoidance-striking-arrival problem.

关键词： Adaptive robust control Multivariable tank system Uncertainty Constraint following Avoidance-striking-arrival

Adaptive robust feedback control of moving target tracking for all-Electrical tank with uncertainty

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Defence Technology（防务技术） 2022年第4期18卷 626-642页

作者： Yu-ze Ma Guo-lai Yang qin-qin Sun Xiu-ye Wang Zong-fan Wang The School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China

A moving target tracking control problem for marching tank based on adaptive robust feedback control scheme is addressed.A series of preparations is needed for tank gun before shooting a target,the purpose of this paper is to design a control system to fulfill two requirements in this process:the turretbarrel system of tank needs to be adjusted from off-target position to command position and point to the moving target stably when there are strong uncertainties(modeling error,uncertain disturbance with unknown boundaries and road excitation) in the *** the characteristic of coupled interaction,the first thing we do in this paper is to build a coupled analysis model of turret-barrel system with uncertainty term in state-space ***,an adaptive robust feedback control scheme is proposed by adding adaptive law to overcome the ***,multi-body dynamics software is used to establish the mechanical mechanism of the tank,and DC-motor module is established in SIMUliNK environment,thus the target information and tracking error of the control system is collected and transferred,the gear-ball screw is derived directly by the output torque of the DC-motor ***,the control system and the 3D model are combined together by means of Recur Dyn/SIMUliNK co-simulation,the turret-barrel system of tank can approximately track the moving target in a certain *** the adaptive robust feedback control,the target action is completely followed when the target location is constantly changing.

关键词： Mechanical system Tank stability Uncertainty Road excitation Adaptive robust feedback control

Robustness of the octupole collectivity in 144Ba within the cranking covariant density functional theory in 3D lattice

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Nuclear Science and Techniques 2024年第8期35卷 124-131页

作者： ze‑Kai li Yuan‑Yuan Wang Mathematics and Physics Department North China Electric Power UniversityBeijing 102206China Hebei Key Laboratory of Physics and Energy Technology North China Electric Power UniversityBaoding 071000China

The octupole deformation and collectivity in octupole double-magic nucleus 144Ba are investigated using the Cranking covariant density functional theory in a three-dimensional lattice *** reduced B(E3)transition probability is implemented for the first time in semiclassical approximation based on the microscopically calculated electric octupole *** available data,including the I-ωrelation and electric transitional probabilities B(E2)and B(E3)are well ***,it is shown that the ground state of 144Ba exhibits axial octupole and quadrupole deformations that persist up to high spins(I≈24h).

关键词： Octupole collectivity Cranking covariant density functional theory Rotational spectrum Electric transitional probabilities

Assessing the factors impacting the bioaccessibility of mercury(Hg) in rice consumption by an in-vitro method

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Journal of Environmental Sciences 2022年第9期34卷 119-129页

作者： ze Wu Ping li Xinbin Feng College of Eco-Environmental Engineering Guizhou Minzu UniversityGuiyang 550025China Key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of EducationGuizhou Medical UniversityGuiyang 550025China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China

Mercury(Hg) in rice is drawing mounting concern since methylmercury(MeHg) was found capable of accumulating in rice. In-vitro bioaccessibility is a feasible and reliable method to assess the health effects of Hg in rice and has been utilized in a number of studies. This study was done to investigate the impact of cultivar, planting location, and cooking on the total mercury(THg) and MeHg bioaccessibility of rice, for which multiple statistical analysis methods were used to analyze the significance of their effects. The THg concentrations of rice samples taken from non-Hg contaminated areas of China were all below 15 ng/g and their MeHg concentrations were below 2 ng/g. Cooking could significantly reduce the MeHg bioaccessibility of rice because the MeHg was mainly combined with protein and the protein will be denatured during the cooking process, and then the denatured MeHg is difficult to be dissolved into the liquid phase. Indica-and japonica-type rice cultivars did not show significant differentiation in either the concentration of Hg or its bioaccessibility. However, the glutinous rice type differed significantly from the above rice types, and it showed greater bioaccessibility of THg and MeHg due to its distinct protein contents and starch properties. Planting location can affect the Hg concentration in rice and THg bioaccessibility but has a limited impact on MeHg bioaccessibility. Based on these results, two macro factors(rice cultivar, planting location) are presumed to impact Hg bioaccessibility by how they affect micro factors(i.e., Hg forms).

关键词： Rice Bioaccessibility Mercury Impact factors