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A general climatology of categorized Martian ionospheric irregularities

Science China Earth Sciences 2024年第10期67卷 3302-3325页

作者： Xin WAN jiahao ZHONG Yongqiang HAO Chao XIONG Hui WANG Yutian CAO Jun CUI Yiwen liU Qiaoling li Jiawei KUAI Planetary Environmental and Astrobiological Research Laboratory (PEARL) School of Atmospheric Sciences Sun Yat-sen University Key Laboratory of Tropical Atmosphere-Ocean System Ministry of Education Department of Space Physics College of Electronic Information Luojia Laboratory Wuhan University School of Physics and Electronic Information Shangrao Normal University School of Petroleum China University of Petroleum-Beijing at Karamay College of Astronautics Nanjing University of Aeronautics and Astronautics

A climatological survey of Martian ionospheric plasma density irregularities was conducted by exploring the in-situ measurements of the Mars Atmosphere and Volatile EvolutioN(MAVEN) spacecraft. The irregularities were first classified as enhancement, depletion, and oscillation. By checking the simultaneous magnetic field fluctuation, the irregularities have been classified into two types: with or without magnetic signatures. The classified irregularities exhibit diverse global occurrence patterns, as those with magnetic signatures tend to appear near the periphery of the crustal magnetic anomaly(MA), and those without magnetic signatures prefer to appear either inside of the MA or outside of the MA, depending on the type and solar zenith angle. Under most circumstances, the irregularities have a considerable occurrence rate at altitudes above the ionospheric dynamo height(above 200 km), and the magnetization state of the ions seems irrelevant to their occurrence. In addition, the irregularities do not show dependence on magnetic field geometry, except that the enhancement without magnetic signatures favors the vertical field line, implying its equivalence to the localized bulge. Other similarities and discrepancies exist in reference to previous studies. We believe this global survey complements previous research and provides crucial research clues for future efforts to clarify the nature of the Martian ionospheric irregularities.

关键词： Mars MAVEN Ionosphere Ionospheric irregularities Crustal magnetic anomaly Plasma

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Distributions and accumulation mechanisms of helium in petroliferous basins

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Science China Earth Sciences 2024年第10期67卷 3143-3168页

作者： Pengpeng li Quanyou liU Dongya ZHU Di ZHU Zheng ZHOU Xiaoqi WU Qingqiang MENG jiahao LV Yu GAO Institute of Energy Peking University Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Petroleum Exploration & Production Research Institute SINOPEC Energy Research Institute Qilu University of Technology (Shandong Academy of Sciences) Lancaster Environment Centre Lancaster University Institute of Geology and Geophysics Chinese Academy of Sciences University of Chinese Academy of Sciences

Helium is an irreplaceable strategic mineral resource, and commercial helium-rich gas fields（He>0.1%） worldwide are typically discovered serendipitously during hydrocarbon exploration efforts. According to an analysis of 75 helium-rich gas fields and 1048 natural gas samples worldwide, helium in natural gas generally exhibits “scarce”, “accompanying”, and“complex” properties, and helium-rich gas fields often occur at depths lium concentrations in He-CH4and He-CO2gas fields are notably lower than those in He-N2gas fields（He>1%）. However, geological reserves in the former two types of gas fields are mainly in the range of 10～7–1011m3, whereas in the latter, they are only in the range of 10～5–10～7m3. There are nevertheless notable disparities in the genesis and migration patterns between helium and gaseous hydrocarbons. Helium necessitates carriers（such as formation water, hydrocarbon fluids, N2, mantle-derived fluids, etc.） during both accumulation and long-distance migration processes, where migration conduits are not confined to sedimentary strata, and may extend to the basin's basement, lower crust, and even lithospheric mantle. However, the accumulation conditions of both helium and gaseous hydrocarbons are generally considered equivalent. The presence of gaseous hydrocarbons facilitates both the rapid exsolution of helium within helium-containing fluids and subsequent efficient aggregation in gaseous hydrocarbons, while both reduce helium diffusion and diminish escape flux. In terms of caprock, gypsum, salt, and thick shale as sealing layers contribute to the long-term preservation of helium over geological timescales. Large helium-rich gas fields, predominantly crust-derived gas fields, are primarily concentrated in uplifted zones of ancient cratonic basins and their peripheries. Based on a diagram of the He concentration versus He/N2ratio, crust-derived helium fields can be categorized as basement, combined basement-sedimentary rock, and sedimentary

关键词： Helium resource Geochemical characteristics Helium source rock Helium supply pattern Accumulation mechanism Determination of favorable zones

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關於東周器名“[木口]”及其異體的釋讀—兼釋戰國文字“[酉木口]”和人名、複姓中的“[木口]”

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文史 2021年第3期 5-16页

作者：李家浩安徽大學漢字發展與應用研究中心

東周時期,有一個器名之字作“[木口]”,其異體作“[金木口]”或“[角口]”。古文字學界對“[木口]”及其異體的釋法,主要有兩種不同意見。在兩種不同釋法當中,根據有關情況,把這個器名之字“[木口]”及其異體所從“口”釋爲“肙”的省... 详细信息

東周時期,有一個器名之字作“[木口]”,其異體作“[金木口]”或“[角口]”。古文字學界對“[木口]”及其異體的釋法,主要有兩種不同意見。在兩種不同釋法當中,根據有關情況,把這個器名之字“[木口]”及其異體所從“口”釋爲“肙”的省寫是可取的,它們在銘文中用爲“梋”或“鋗”,指盌一類器皿。“[木口]”字還見於戰國文字人名、複姓之中,也應該釋爲“梋”。此外,戰國竹簡文字中還有一個“[酉木口]”字也從“[木口]”,此字在簡文中用爲“[酉肙]”。

关键词：器名肙梋鋗 [酉肙]

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Probing nickelate superconductors at atomic scale: A STEM review

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CHINESE PHYSICS B 2024年第9期33卷 2-11页

作者： Lei, Yihan Wang, Yanghe Song, jiahao Ge, Jinxin Wu, Dirui Zhang, Yingli li, Changjian Southern Univ Sci & Technol Dept Mat Sci & Engn Shenzhen 518055 Peoples R China Southern Univ Sci & Technol Guangdong Prov Key Lab Funct Oxide Mat & Devices Shenzhen 518055 Peoples R China

The discovery of nickelate superconductors, including doped infinite-layer (IL) nickelates RNiO2 (R = La, Pr, Nd), layered square-planar nickelate Nd6Ni5O12, and the Ruddlesden-Popper (RP) phase La3Ni2O7, has spurred immense interest in fundamental research and potential applications. Scanning transmission electron microscopy (STEM) has proven crucial for understanding structure-property correlations in these diverse nickelate superconducting systems. In this review, we summarize the key findings from various modes of STEM, elucidating the mechanism of different nickelate superconductors. We also discuss future perspectives on emerging STEM techniques for unraveling the pairing mechanism in the "nickel age" of superconductivity.

关键词： scanning transmission electron microscopy superconductivity epitaxial thin films nickelates 68.37.Ma 74.25.Dw 81.30.Dz 79.20.Uv LANIO3 PEROVSKITE REDUCED FORMS RECONSTRUCTION INTERFACE

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基于X射线图像和激光点云的煤矸识别方法

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仪器仪表学报 2022年第9期43卷 193-205页

作者：司垒谭超朱嘉皓王忠宾李嘉豪中国矿业大学机电工程学院徐州221116

煤矸高效分选是实现煤炭资源绿色开采的重要手段,其核心技术是煤和矸石的快速精准识别。因此,本文提出了基于X射线图像和激光点云融合的煤矸识别方法。首先,设计了基于局部熵和全局均差加权的改进Otsu分割算法,以此提高X射线图像的分割... 详细信息

煤矸高效分选是实现煤炭资源绿色开采的重要手段,其核心技术是煤和矸石的快速精准识别。因此,本文提出了基于X射线图像和激光点云融合的煤矸识别方法。首先,设计了基于局部熵和全局均差加权的改进Otsu分割算法,以此提高X射线图像的分割精度和分割效率;同时,利用直通滤波和体素栅格降采样简化了煤矸激光点云数据,进而提取了X射线图像和激光点云的煤矸组合特征。然后,针对传统麻雀搜索算法(SSA)易陷入局部最优和种群多样性差等问题,提出了多策略改进的SSA算法(ISSA),并用于轻量梯度提升机(lightGBM)参数的寻优,进而设计了基于ISSA-lightGBM的煤矸快速识别模型。最后,搭建了煤矸识别实验平台,开展了相应的实验对比分析,结果表明:ISSA-lightGBM模型的煤矸识别准确达99.00%,综合性能优于其它模型,满足了煤矸高效识别的需求。

关键词：煤矸识别 X射线图像激光点云特征提取轻量梯度提升机

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Deformation characteristics of mylonites in Luoluan fault belt in the Qinling orogenic belt and its tectonic significance

Deformation characteristics of mylonites in Luoluan fault be...

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2014年中国地球科学联合学术年会——专题46：中央造山带构造演化与成矿

作者： Shenglian Ren Chuanzhong Song jiahao li Longming li Da Hu Wei Wang School of Resources and Environmental Engineering Hefei University of Technology

The Qinling orogenic belt is a continental-orogeny formed by continental subduction and *** south boundaries of North China Plate are strongly deformed in the above process,and eventually they involved in and become an important part of the orogenic belt(Zhang,2001).Luoluan fault belt is a huge fault zone beneath the south boundaries of North China-Craton(Song,2009).The tectonic rocks in this special location can not only record the whole process of the formation and evolution of the orogenic belt,but also

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关于楚墓遣策所记瑟的附属物“桊”及其有关问题

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江汉考古 2021年第4期 134-138页

作者：李家浩安徽大学汉字发展与应用研究中心安徽合肥230601

二十世纪90年代末,我曾在一篇小文里论及楚墓遣策所记瑟的附属物“桊”。近年公布的江西南昌海昏侯墓出土的瑟禁,证明瑟的附属物“桊”就是瑟禁的“禁”,是放置瑟的座具。本文在这一认识的基础上,进一步论证上古音“桊”可以读为“禁”... 详细信息

二十世纪90年代末,我曾在一篇小文里论及楚墓遣策所记瑟的附属物“桊”。近年公布的江西南昌海昏侯墓出土的瑟禁,证明瑟的附属物“桊”就是瑟禁的“禁”,是放置瑟的座具。本文在这一认识的基础上,进一步论证上古音“桊”可以读为“禁”,同时还论及跟瑟禁有关的一些问题。

关键词：瑟桊禁座具

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Satellite-to-aircraft quantum key distribution performance estimation with boundary layer effects

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Chinese Optics Letters 2023年第4期21卷 120-128页

作者：于惠存唐帮盈李佳豪曹跃翔周涵李斯晨熊浩西刘博石磊 Information and Navigation College Air Force Engineering UniversityXi’an 710077China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China College of Computer and Science National University of Defense TechnologyChangsha 410073China Teaching and Research Support Center National University of Defense TechnologyChangsha 410073China

Remarkable progress has been made in satellite-based quantum key distribution [QKD],which can effectively provide QKD service even at the intercontinental scale and construct an ultralong-distance global quantum *** there are still some places where terrestrial fiber and ground stations cannot be constructed,like harsh mountainous areas and air space above the *** the airborne platform is expected to replace the ground station and provide flexible and relay links for the large-scale integrated communication ***,the photon transmission rate would be randomly reduced,owing to the randomly distributed boundary layer that surrounds the surface of the aircraft when the flight speed is larger than0.3 *** research of airborne QKD with boundary layer effects is mainly under the air-to-ground scenario in which the aircraft is a transmitter,while the satellite-to-aircraft scenario is rarely *** this article,we propose a performance evaluation scheme of satellite-to-aircraft QKD with boundary layer effects in which the aircraft is the *** common experimental settings,the boundary layer would introduce a ~31 dB loss to the transmitted photons,decrease ~47% of the quantum communication time,and decrease ~51% of the secure key rate,which shows that the aero-optical effects caused by the boundary layer cannot be *** study can be performed in future airborne quantum communication designs.

关键词： satellite-to-aircraft quantum key distribution boundary layer aero-optical effects

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泥河湾盆地下沙沟剖面磁组构特征分析与古湖环境变化研究

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第四纪研究 2022年第2期42卷 562-576页

作者：高显丽李嘉皓刘平中国科学院大学地球与行星科学学院计算动力学重点实验室北京100049

泥河湾盆地是中国北方很重要的沉积盆地,但由于盆地范围较广,局部地区环境变化差异较大,目前对泥河湾盆地的环境变化的认识还较为局限。文章通过对下沙沟剖面(厚度260 m)的河湖相沉积物进行详细的岩石磁学和磁组构研究,以尝试恢复下沙... 详细信息

泥河湾盆地是中国北方很重要的沉积盆地,但由于盆地范围较广,局部地区环境变化差异较大,目前对泥河湾盆地的环境变化的认识还较为局限。文章通过对下沙沟剖面(厚度260 m)的河湖相沉积物进行详细的岩石磁学和磁组构研究,以尝试恢复下沙沟地区以及盆地东部古湖环境的演化过程,希望能够对泥河湾盆地环境变化提供一些新的指示。研究结果显示,样品中磁性矿物以PSD的磁铁矿颗粒为主,部分样品中含有少量赤铁矿。下沙沟剖面的沉积物受后期扰动很小,属于正常的重力沉积。沉积物磁面理(F)比磁线理(L)更发育,磁组构参数中磁面理F、各向异性度P;和水流速度函数Fs对环境变化的响应更加明显,古水流分析结果显示下沙沟地区没有长期稳定的流向,环境变化情况复杂。根据下沙沟剖面河湖相沉积物的磁性地层学年龄框架,以郝家台剖面顶部河湖相沉积物的年龄作为该剖面的顶界,得到了下沙沟剖面2.7~0.3 Ma的磁组构参数变化特征。结合岩性和磁组构参数变化的阶段性特征,将下沙沟地区以及盆地东部古湖环境演化历史分为5个阶段:2.7~2.4 Ma,古湖早期逐渐扩张,于早更新世达到了古湖发育的最盛时期,水体动荡,略不稳定;2.4~1.9 Ma,环境变化主要受气候因素影响,下沙沟地区水动力频繁变化,古湖经历了一次扩张和收缩;1.9~1.3 Ma,下沙沟地区的沉积主要受控于河流作用,盆地东部主要受到构造因素的影响,古湖处于持续收缩的阶段;1.3~0.9 Ma,下沙沟地区环境变化剧烈,受中更新世气候转型的影响较大,古湖东部也较大范围的受到中更新世气候转型的影响;0.9~0.3 Ma,全球气候变化剧烈,对古湖东部环境也有一定的影响,但整体还处于水体较为稳定的湖泊环境,古湖并未开始消亡。

关键词：泥河湾盆地下沙沟剖面磁组构古湖环境

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不同光质LED光源对星孢寄生菇生长发育的影响

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中国瓜菜 2024年第2期37卷 32-37页

作者：周会明王朝雯李加豪白玉英普艳郑昭排南胜普馨语滇西科技师范学院生物技术与工程学院云南临沧677000

为探究星孢寄生菇在光胁迫下的生长发育特性,采用平板培养法,研究了10种不同光质LED光源对该菇菌丝生长、原基分化及子实体发育的影响。结果表明,与黑暗对照相比,不同光源对该菇菌丝生长均有抑制作用,其中白光的抑制效果最显著。同时,... 详细信息

为探究星孢寄生菇在光胁迫下的生长发育特性,采用平板培养法,研究了10种不同光质LED光源对该菇菌丝生长、原基分化及子实体发育的影响。结果表明,与黑暗对照相比,不同光源对该菇菌丝生长均有抑制作用,其中白光的抑制效果最显著。同时,光源对该菇原基分化数量的影响不显著,但白光培养下的原基分化时间最长(3.75 d)。此外,暖黄光对该菇子实体发育有促进作用,蓝光有抑制作用,紫光有先抑制后促进的作用。接种后2~3 d,该菇菌丝生长速度和原基分化数量呈线性增长趋势,在大多数光源下分别在第3、4天达到峰值;第3~4天,在大多数光源下,该菇子实体发育数量也呈线性增长趋势,并达到峰值。值得注意的是,在某些光源下,该菇菌丝生长速度、原基分化数量和子实体发育数量在高峰期后仍呈现小高峰。总之,光胁迫对该菇菌丝生长不利,对原基分化影响较小,但对子实体发育有正负两方面的影响。

关键词：星孢寄生菇 LED光源菌丝生长原基分化子实体发育

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