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Derivative Form of Off-axis Aberration Correction Surface and Its Application in Solar Energy Concentration

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Communications in Theoretical Physics 2009年第2期51卷 315-320页

作者： LI Li CHEN Ying-Tian hu sen Joint Advanced Research Center in Suzhou University of Science and Technology of China and City University of Hong Kong Suzhou 215123 China Suzhou Institute for Advanced Study University of Science and Technology of China Suzhou 215123 China Department of Astronomy and Applied Physics University of Science and Technology of China Heifei 230026 China Department of Mathematics University of Science and Technology of China Hefei 230026 China

By using the derivative method, we obtained the same result with that of the previous work of Chen et al. in 2006. Different from the integral form, the derivative form of the surface expression published in this paper is derived from differential equation and based on the theory of non-imaging focusing heliostat proposed by Chen et al. in 2001. The comparison of the derivative form of fixed aberration correction surface has been made with that of integral form surface as well as that of spherical surface in concentrating the solar ray.

关键词： off-axis aberration correction canting continuous surface asymmetric curvature

Chang’e-5 samples reveal two-billion-year-old volcanic activity on the Moon and its source characteristics

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Science China Earth Sciences 2021年第12期64卷 2083-2089页

作者： Shoujie LIU Qin ZHOU Qiuli LI sen hu Wei YANG Institute of Geology Chinese Academy of Geological SciencesBeijing100037China National Astronomical Observatories Chinese Academy of SciencesBeijing100101China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing100029China

The Chang’e-5 mission returned new lunar samples after the last sample mission of the Moon 44 years ago,and is also the first mission that China has completed the sampling of extraterrestrial ***,independent teams from the Institute of Geology,Chinese Academy of Geological Sciences,and the National Astronomical Observatories and the Institute of Geology and Geophysics,Chinese Academy of Sciences reported the first batch of results of Chang’e-5 lunar *** basic physical properties of the Chang’e-5 soil are within the range of the Apollo and Luna samples though the Chang’e-5 soil is finer-grained,better sorted,and has a slightly lower true density than the mare basalt previosuly *** Pb-Pb dating of U-rich minerals in the Chang’e-5 basalt clasts indicated that they formed at about 2.0 Ga,800 million years younger than the youngest lunar sample recovered previously(2.8 Ga),confirming that lunar volcanic activity can last at least until 2 ***-situ Sr-Nd isotope analyses suggested that the Chang’e-5 basalt originated from a depleted mantle *** contribution of the KREEP component is less than 5%,which excluded the hypothesis that KREEP-rich sources provide an additional heat source for mantle *** addition,water contents and H isotopes of apatite and melt inclusions of the Chang’e-5 basalt suggested that the source region is not rich in water which can lower the melting ***,the reason why lunar volcanic activity can last so long is still unclear,which is a new direction for future lunar exploration and research.

关键词： Chang'e-5 Lunar soil Basalt Pb-Pb dating Sr-Nd isotopes Water H isotope

Petrography,mineral chemistry and shock metamorphism of Yamato 984028 lherzolitic shergottite

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Chinese Science Bulletin 2011年第15期56卷 1579-1587页

作者： hu sen FENG Lu LIN YangTing Key Laboratory of the Earth's Deep Interior Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Y984028 is a new lherzolitic shergottite,consisting of poikilitic and non-poikilitic *** mafic silicates are FeO-poor,and the chromite is TiO 2-poor in the poikilitic lithology compared to the grains in the non-poikilitic *** meteorite shares similarmineral petrography andmineral chemistry with GRV 99027,but is not paired with the latter because of their different shock-induced features.Y984028 was severely shocked and experienced no significant thermal metamorphism after the main impact ***,Y984028 serves as a probe for the study of meteorite impact processes on terrestrial *** melt veins in Y984028 are characterized by the absence of any high-pressure polymorphs,the presence of abundant smallmineral fragments,and the prevailing granulation textures of olivine and *** features are consistent with adiabatic melting during the release of shock-induced high-pressure and quenching at ambient pressure.

关键词：矿物岩石学矿物化学变质作用二氧化钛激波诱导撞击过程陆地表面压力淬火

Water and other volatiles on Mars

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National Science Review 2024年第6期11卷 12-14页

作者： sen hu Yubing Gao Zhan Zhou Liang Gao Yangting Lin Key Laboratory of the Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences

Mars, the intriguing red planet, is one of the planets most similar to the Earth in our solar system. It is widely accepted that Mars could have had a warm and wet climate in its early history supported by numerous lines of evidence, e.g. topography, canyons, outflow channels, presence of phyllosilicates and evaporative salts,sedimentary formation, and many others (e.g.[1]), and thus Mars is believed to once have a potentially habitable environment which could be able to supply fundamental conditions for the evolution of potential lives.

关键词： mars water other volatiles

Efficacy of multi-slice spiral computed tomography in evaluating gastric cancer recurrence after endoscopic submucosal dissection

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World Journal of Gastrointestinal Oncology 2023年第9期15卷 1636-1643页

作者： Jian-Jun Yin Xiao hu sen hu Guo-Hong Sheng Department of Radiology Huangshi Maternity and Children's health HospitalAffiliated Maternity and Children's Health Hospital of Hubei Polytechnic UniversityHuangshi 435000Hubei ProvinceChina Department of Geriatrics Huangshi Central HospitalAffiliated Hospital of Hubei Polytechnic UniversityHuangshi 435000Hubei ProvinceChina

BACKGROUND Recurrence is the major challenge facing endoscopic submucosal dissection(ESD)-based treatment therapies for early gastric cancer(EGC).Urgent development of simple and easy surveillance approaches will enhance clinical treatment of the *** To explore the role of computed tomography(CT)recurrence in evaluating EGC after ESD *** We retrospectively recruited patients from our endoscopy department,between January 2002 and December 2015,and analyzed their basic characteristics,including symptoms,CT results,and results of endoscopy with biopsy,among *** Among a total of 2150 patients EGC patients surveyed,1362 met our inclusion and exclusion criteria and were therefore enrolled in our *** cohort’s sensitivity of CT for recurrent GC and specificity were 44.22%and 43.86%,respectively,with negative and positive predictive values of 40.15%(275/685)and 48.01%(325/677),*** area under the curve of arterial and venous CT values for recurrent EGC were 0.545,and 0.604,*** operating characteristic curve revealed no statistically significant differences between arterial and venous CT values for recurrent *** Enhanced CT has superior diagnostic efficacy,but less accuracy,compared to gold standard techniques in patients with recurrent EGC.

关键词： Computed tomography Early gastric cancer Gastric cancer Multi-slice spiral computed tomography

HOMFLY Polynomial from a Generalized Yang–Yang Function

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Communications in Mathematics and Statistics 2015年第3期3卷 329-352页

作者： sen hu Peng Liu Wu Wen-Tsun Key Lab of Mathematics School of MathematicsUniversity of Science and Technology of ChinaChinese Academy of SciencesHefeiChina

Starting from the free field realization of Kac-Moody Lie algebra,we define a generalized Yang-Yang *** for the Lie algebra of type An,we derive braiding and fusion matrix by braiding the thimble from the generalized Yang-Yang *** can construct a knots invariant H(K)from the braiding and fusion *** is an isotropy invariant and obeys a skein *** them,we show that the corresponding knots invariant is HOMFLY polynomial.

关键词： Yang-Yang function Thimbles HOMFLY polynomials

Theoretical investigation on the cavitation bubble dynamics near three spherical particles based on Weiss theorem

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Journal of Hydrodynamics 2023年第6期35卷 1119-1130页

作者： Yu-ning Zhang Zhi-ling Ding Jing-rong hu Xiao-xiao Zheng Jia-xin Yu Jin-sen hu College of Mechanical and Transportation Engineering China University of Petroleum-BeijingBeijing102249China Beijing Key Laboratory of Process Fluid Filtration and Separation China University of Petroleum-BeijingBeijing102249China China Fire and Rescue Institute Beijing102202China Key Laboratory of Power Station Energy Transfer Conversion and System(Ministry of Education) School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China

To research the dynamics of the cavitation bubble under the interaction of particle clusters,the bubble morphological evolutionary characteristics near three equal-sized spherical particles are theoretically explored in the present study based on the Weiss theorem and the velocity potential superposition *** three particles are arranged symmetrically,and the fluid velocity field near the three particles and the cavitation bubble is ***,the effects of the bubble-particle distance and the maximum radius of the cavitation bubble on the fluid velocity are investigated,and the contribution mechanisms of the fluid velocity field constituents are *** analysis has found that:(1)The fluid velocity between the bubble and the particle is lower than that at the other locations in both the growth and collapse phases,thus the bubble cannot always maintain a standard spherical shape.(2)The bubble-particle distance and the maximum radius of the cavitation bubble are the key parameters affecting the circumferential inhomogeneity of the radial velocity of the fluid around the *** larger the maximum radius or the smaller the bubble-particle distance is,the more visible the non-circularity of the bubble morphology.(3)The image bubbles and the linear sinks contribute oppositely to the fluid velocity field,and the presence of the image bubble reduces the fluid *** the low velocity region,the image bubble is the main mechanism contributing to the effect of the particle on the fluid velocity.

关键词： Particles-bubble effects velocity potential fluid velocity bubble morphology Weiss theorem

NanoSIMS imaging method of zircon U-Pb dating

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Science China Earth Sciences 2016年第11期59卷 2155-2164页

作者： hu sen LIN YangTing YANG Wei WANG Wei-(RZ) ZHANG JianChao HAO JiaLong XING WeiFan Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Institute of Geomechanics Chinese Academy of Geological Sciences

We report an imaging method of zircon U-Pb dating with NanoSIMS 50 L, which overcomes the significant U-Pb fractionation as the pit was sputtered deeper during conventional spot mode analysis and can be applied to irregular small grains or heterogeneous areas of zircon. The U-Pb and Pb-Pb ages can be acquired simultaneously for 2 μm×2 μm(for small grains) or 1 μm×9 μm(for zoned grains), together with Zr, Y and other trace elements distributions. Using zircon M257 as standard, the U-Pb ages of other zircon standards, including Qinghu, Plesovice, Temora and 91500, were measured to(2σ) as158.8±0.8, 335.9±3.4, 412.0±12 and 1067±12 Ma, respectively, consistent with the recommended values within the analytical uncertainties. Tiny zircon grains in the impact melt breccia of the lunar meteorite SaU 169 were also measured in this study,with a Pb-Pb age of 3912±14 Ma and a U-Pb age of 3917±17 Ma, similar to previous results reported for the same *** imaging method was also applied to determine U-Pb age of the thin overgrowth rims of Longtan metamorphic zircon, with a Pb-Pb age of 1933±27 Ma and a U-Pb age of 1935±25 Ma, clearly distinct from the Pb-Pb age of 2098±61 Ma and the U-Pb age of 2054±40 Ma for detrital cores.

关键词： Zircon U-Pb dating NanoSIMS Imaging Trace elements Zoning

Numerical investigations of the interactions between bubble induced shock waves and particle based on OpenFOAM

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Journal of Hydrodynamics 2024年第2期36卷 355-362页

作者： Jia-xin Yu Jin-sen hu Yu-hang Liu Yi-fan Liu Dan Gao Yu-ning Zhang Key Laboratory of Power Station Energy Transfer Conversion and System Ministry of EducationSchool of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China

The presence of particles and the shock waves generated by the cavitation bubbles can significantly affect the safety and the performance of hydrodynamic *** the present paper,the shock waves generated by cavitation bubble collapsing near the particle are numerically investigated based on the OpenFOAM together with the numerical schlieren for the shock wave *** numerical results reveal that the stand-off distance is one of the paramount factors affecting the interactions between the particle and the shock *** different kinds of shock waves(e.g.,bubble-inception,jet formation,particle reflected and jet-split shock waves)are observed during the bubble collapsing near the *** stand-off distance smaller than 0.5 or larger than 1.1,the maximum pressure at particle surface generated by the bubble growth can surpass those of the collapse stage.

关键词： Particle-bubble interaction shockwaves jetdynamics