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Multiphysics simulation and optimization of the in-situ beneficiation process of ilmenite minerals from lunar regolith

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Science China Earth Sciences 2025年第1期68卷 195-207页

作者： Peng ZHANG Xin LIU Guanghui LIU Wei dai Hanzhe YANG Haibo ZHENG Zhi WANG Ran NIU Yifan BAI Yang ZHANG Chengbao LIU Ge YANG Junwei YANG Guang ZHANG Technology and Engineering Center for Space Utilization Chinese Academy of SciencesBeijing100094China Beijing Hegong Simulation Co. LtdBeijing100089China

The exploration and utilization of lunar resources have become the major objectives of future lunar exploration *** classified collection and processing of lunar minerals is the basic prerequisite for the in-situ exploration and utilization of lunar *** this study,we propose a scheme for in-situ separation of magnetic minerals from lunar soils using the dry magnetic separation *** scheme can realize the purpose of separating magnetic minerals from lunar regolith by altering the motion trajectory of lunar regolith particles with different magnetic *** modeling of the dry magnetic separation device is conducted,and the three-dimensional distribution of magnetic parameters is calculated and *** on the characterization and analysis of the Chang E-5's samples,the morphologies and physical parameters of lunar regolith particles are modeled and simulated.A discrete element simulation of the motion process of lunar regolith particles under multi-physical field conditions is performed,and the influences of key parameters on the beneficiation performance of lunar magnetic minerals are *** results indicate that optimal separation and beneficiation of lunar regolith particles can be achieved under specific conditions of magnetic field strength and drum ***,we analyze the effects of lunar weak gravity conditions and the charged nature of lunar particles on the beneficiation process,showing that these factors can obviously enhance the beneficiation process of lunar *** study demonstrates the feasibility of using the dry magnetic separation method for the beneficiation of magnetic minerals from lunar regolith,providing a theoretical basis for the scientific tasks of collecting,processing,and utilizing lunar mineral resources.

关键词： Lunar regolith In-situ resource utilization Magnetic separation Classified sampling

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论从轻罪到轻犯罪及出罪路径

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当代法学 2025年第1期39卷 66-73页

作者：徐岱吉林大学法学院

随着积极刑法观的深入,我国刑法立法结构呈现出轻罪立法走向,但若想用轻罪概念囊括立法和司法两方面的本质特征是勉为其难,也易产生歧义。合理的思路是在坚持轻罪概念所反映的立法本源性特征基础上,采用轻犯罪概念以充分展示动态司法过... 详细信息

随着积极刑法观的深入,我国刑法立法结构呈现出轻罪立法走向,但若想用轻罪概念囊括立法和司法两方面的本质特征是勉为其难,也易产生歧义。合理的思路是在坚持轻罪概念所反映的立法本源性特征基础上,采用轻犯罪概念以充分展示动态司法过程与司法态势。对于轻犯罪的治理问题,首先需要明确阻却犯罪成立的理论支撑与出罪支点,即在坚持我国犯罪构成体系的前提下以《刑法》第13条但书及正当化事由作为出罪的主要通道。我国四要件犯罪构成体系遵循了从事实判断到规范判断再到价值判断、从客观判断再到主观判断这一判断犯罪成立的基本规律,而且同样具有出罪的构成要素。其次是建立社会危害性的综合评价标准,即从主客观两个方面来把握《刑法》第13条但书中“情节显著轻微”的标准。最后是强调轻微犯罪的治罪与治理,针对轻微犯罪的不法应坚持实质违法性的判断,切勿以违反前置法这一形式外观为由忽视实质判断。

关键词：轻犯罪犯罪构成体系但书轻微犯罪

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Joint communication and computation design for secure integrated sensing and semantic communication system

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Science China(Information Sciences) 2025年

作者： Jianxin dai Hui FAN Zhouxiang ZHAO Yongjun XU Zhaohui YANG Xu GAN Zhaoyang ZHANG School of Science Nanjing University of Posts and Telecommunications National Mobile Communications Research Laboratory Southeast University College of Information Science and Electronic Engineering Zhejiang University Zhejiang Provincial Laboratory of Multi-Modal Communication Networks and Intelligent Information Processing School of Communications and Information Engineering Chongqing University of Posts and Telecommunications

As a new communication paradigm, semantic communication (SC) differs from conventional communication based on bit transmission by transmitting semantic information, which demonstrates enormous potential in improving communication efficiency. To ensure transmission security, this paper investigates the secure resource allocation problem of integrated sensing and semantic communication (ISSC) systems in the scenario involving multiple eavesdroppers considering cases of both perfect and imperfect channel state information (CSI). Specifically, the concept of secure semantic rate (SSR) is first put forward to measure the reliability of user information acquisition, and then an optimization problem is formulated to maximize the secure semantic efficiency (SSE), which is defined as the ratio of the sum of SSRs to total transmit power. To work out this problem, the optimization problem is first decoupled into two subproblems, i.e., beamforming optimization subproblem and semantic parameter optimization subproblem. For the beamforming optimization subproblem, this paper simplifies the objective function by utilizing the Dinkelbach algorithm with given semantic parameters and proposes an alternating algorithm to solve a series of convex subproblems iteratively. For the semantic parameter subproblem, the monotonically decreasing property of the objective function with respect to the semantic parameter is revealed mathematically under a given beamforming ***, simulation results verify the theoretical analysis.

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Anisotropic transport properties and topological Hall effect in the annealed kagome antiferromagnet FeGe

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Science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 153-160页

作者： Jiajun Ma Chenfei Shi Yantao Cao Yuwei Zhang Yazhou Li Jiaxing Liao Jialu Wang Wenhe Jiao Hanjie Guo Chenchao Xu Shixun Cao Jianhui dai Jin-Ke Bao Yuke Li School of Physics Hangzhou Key Laboratory of Quantum MattersHangzhou Normal UniversityHangzhou311121China Department of Physics Materials Genome Institute and International Center for Quantum and Molecular StructuresShanghai UniversityShanghai200444China Key Laboratory of Quantum Precision Measurement of Zhejiang Province Department of Applied PhysicsZhejiang University of TechnologyHangzhou310023China Songshan Lake Materials Laboratory Dongguan523808China School of Physical Science and Technology Lanzhou UniversityLanzhou730000China

Electron correlation often gives birth to various orders in quantum ***,a strongly correlated kagome antiferromagnet Fe Ge is discovered to undergo a charge density wave transition inside the A-type antiferromagnetic state,providing an opportunity to explore the interplay between charge order and ***,we reported the observation of anisotropic resistivity and Hall effect,along with a topological Hall effect,in the annealed Fe Ge *** the current flows along the abplane,the temperature dependence ofρ_(ab)exhibits a distinct resistivity loop related to a first-order transition at T_(cdw).The applied magnetic fields do not alter T_(cdw)but can induce a spin-flop transition at H_(sf).Consequently,a field-induced large topological Hall effect is observed in the canting antiferromagnetic(CAFM)state below T_(cant),which is possibly attributed to the non-trivial spin texture during the spin-flop ***,as current is parallel to c-axis,both the field-induced transitions inρ_(c)andχ_(c)***,the Hall resistivity in the annealed Fe Ge significantly exhibits a deviation from the linear *** findings provide valuable insight into revealing the interplay among magnetism,charge order and topology in the kagome magnets.

关键词： charge density wave Hall effect transport properties kagome magnet

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Efficient View-Based 3-D Object Retrieval via Hypergraph Learning

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Tsinghua Science and Technology 2014年第3期19卷 250-256页

作者： yue Gao Qionghai dai School of Computing National University of Singapore Department of Automation Tsinghua National Laboratory for Information Science and TechnologyTsinghua University

View-based 3-D object retrieval has become an emerging topic in recent years,especially with the fast development of visual content acquisition devices,such as mobile phones with *** research efforts have been dedicated to this task,while it is still difficult to measure the relevance between two objects with multiple *** recent years,learning-based methods have been investigated in view-based 3-D object retrieval,such as graph-based *** is noted that the graph-based methods suffer from the high computational cost from the graph construction and the corresponding learning *** this paper,we introduce a general framework to accelerate the learning-based view-based 3-D object matching in large scale *** a query object Q and one object O from a 3-D dataset D,the first step is to extract a small set of candidate relevant 3-D objects for object *** multiple hypergraphs can be constructed based on this small set of 3-D objects and the learning on the fused hypergraph is conducted to generate the relevance between Q and O,which can be further used in the retrieval *** demonstrate the effectiveness of the proposed framework.

关键词： view-based 3-D object retrieval hypergraph learning

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光谱辐射照度国际关键比对装置、方法与结果分析

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光谱学与光谱分析 2025年第1期45卷 1-7页

作者：代彩红王彦飞李玲吴志峰谢一航中国计量科学研究院光学与激光计量科学研究所北京100029

基于高温黑体辐射源和双光栅光谱辐射比较测量系统,中国计量科学研究院自主研制了新一代光谱辐射照度国家基准装置,波长范围覆盖230~2550 nm,以一组稳定的卤钨灯作为副基准灯组,保存和传递光谱辐射照度量值。黑体的温度溯源至铂-碳Pt-C... 详细信息

基于高温黑体辐射源和双光栅光谱辐射比较测量系统,中国计量科学研究院自主研制了新一代光谱辐射照度国家基准装置,波长范围覆盖230~2550 nm,以一组稳定的卤钨灯作为副基准灯组,保存和传递光谱辐射照度量值。黑体的温度溯源至铂-碳Pt-C和铼-碳Re-C共晶点黑体,在3021 K采用钨碳-碳WC-C共晶点黑体进行验证。采用新基准装置,2017年-2019年NIM参加国际计量局组织的光谱辐射照度国际关键比对CCPR-K1.a,比对由全俄光学物理学测量研究院(VNIIOFI)主导,共有12个实验室参加。比对结果表明:除少数实验室外,在250~290、300~1300、1500~2500 nm波长范围,各参比实验室之间的一致性分别为±2.0%、±1.0%和±2.0%。在紫外、可见和近红外波段,NIM与国际比对参考值的平均相对偏差分别为0.13%、0.28%和0.15%。在250~2500 nm全波段,NIM与国际比对参考值的平均相对偏差为0.17%,与2004年平均相对偏差0.9%相比,测量能力提升显著。

关键词：光谱辐射照度国际比对高温黑体测量不确定度国家基准

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Human-induced pluripotent stem cell-derived neural stem cell exosomes improve blood-brain barrier function after intracerebral hemorrhage by activating astrocytes via PI3K/AKT/MCP-1 axis

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Neural Regeneration Research 2025年第2期20卷 518-532页

作者： Conglin Wang Fangyuan Cheng Zhaoli Han Bo Yan Pan Liao Zhenyu Yin Xintong Ge dai Li Rongrong Zhong Qiang Liu Fanglian Chen Ping Lei Department of Geriatrics Tianjin Medical University General HospitalTianjinChina School of Medicine Nankai UniversityTianjinChina Tianjin Neurological Institute TianjinChina

Cerebral edema caused by blood-brain barrier injury after intracerebral hemorrhage is an important factor leading to poor ***-induced pluripotent stem cell-derived neural stem cell exosomes(hiPSC-NSC-Exos)have shown potential for brain injury repair in central nervous system *** this study,we explored the impact of hiPSC-NSC-Exos on blood-brain barrier preservation and the underlying *** results indicated that intranasal delivery of hiPSC-NSC-Exos mitigated neurological deficits,enhanced blood-brain barrier integrity,and reduced leukocyte infiltration in a mouse model of intracerebral ***,hiPSC-NSC-Exos decreased immune cell infiltration,activated astrocytes,and decreased the secretion of inflammatory cytokines like monocyte chemoattractant protein-1,macrophage inflammatory protein-1α,and tumor necrosis factor-αpost-intracerebral hemorrhage,thereby improving the inflammatory *** sequencing indicated that hiPSC-NSC-Exo activated the PI3K/AKT signaling pathway in astrocytes and decreased monocyte chemoattractant protein-1 secretion,thereby improving blood-brain barrier *** with the PI3K/AKT inhibitor LY294002 or the monocyte chemoattractant protein-1 neutralizing agent C1142 abolished these *** summary,our findings suggest that hiPSC-NSC-Exos maintains blood-brain barrier integrity,in part by downregulating monocyte chemoattractant protein-1 secretion through activation of the PI3K/AKT signaling pathway in astrocytes.

关键词： AKT astrocyte blood-brain barrier cerebral edema exosomes human-induced pluripotent stem cells intracerebral hemorrhage neural stem cells neuroinflammation PI3K

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基于SSR标记的‘黑果枸杞’F_(1)代群体杂种鉴定及遗传关系分析

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西北林学院学报 2025年第1期40卷 92-103页

作者：戴国礼张波米佳尹跃秦垦何昕孺宁夏农林科学院枸杞科学研究所/国家枸杞工程技术研究中心宁夏银川750002

开展基于SSR标记的‘黑果枸杞’F_(1)代群体杂种鉴定及遗传关系分析,为其遗传图谱构建、基因QTL定位以及高花色苷含量新品种选育提供理论支撑。以‘黑果枸杞’与‘白果枸杞’杂交F_(1)代群体(‘Lr-GA’与‘Lr-GB’)为材料,利用11对高多... 详细信息

开展基于SSR标记的‘黑果枸杞’F_(1)代群体杂种鉴定及遗传关系分析,为其遗传图谱构建、基因QTL定位以及高花色苷含量新品种选育提供理论支撑。以‘黑果枸杞’与‘白果枸杞’杂交F_(1)代群体(‘Lr-GA’与‘Lr-GB’)为材料,利用11对高多态性SSR引物进行F_(1)代真实性鉴定,并进行遗传多样性与遗传相似性系数分析。11对SSR引物在正反交2个F_(1)代群体中扩增到10株异常基因型单株,鉴定为假杂种,其余397株为真杂种,真杂种率为96.81%;卡方检验发现仅有1个位点出现偏离(ML0116,P<0.050),其余10个位点均符合孟德尔分离定律。在正反交2个群体中,11对SSR标记分别检测到64个和48个等位基因位点,每个标记等位基因数(Na)在2~9,有效等位基因数(Ne)的变化范围为1.55~4.35,Shannon's信息指数(I)的变化范围在0.58~1.53,观测杂合度(Ho)的变化范围在0.45~1.00,期望杂合度(He)的变化范围在0.35~0.77,F检验值的变化范围在-0.58~0.22;基因多态性信息含量(PIC)的变化范围在0.30~0.73,平均值为0.59,LM0069和LM0101的多态性适中(0.250.5)。基于Nei's遗传距离,UPGMA法聚类结果显示,在Nei's遗传距离0.214处,‘Lr-GA’群体分为2组,‘黑果枸杞’为组Ⅰ,‘白果枸杞’和293株F_(1)代单株聚为组Ⅱ。在Nei's遗传距离0.29处,‘Lr-GB’群体分为2组,‘黑果枸杞’为组Ⅰ,‘白果枸杞’和101株F_(1)代单株聚为组Ⅱ。总体来看,子代经杂交后,多数SSR位点发生了变异,与父本比较而言,其遗传物质更多来源于母本。采用SSR分子标记法可对‘黑果枸杞’的杂交F_(1)代群体进行有效的杂种鉴定,杂交F_(1)代单株的基因分离比符合孟德尔分离定律,且与母本有较近的遗传关系。

关键词：黑果枸杞 SSR 杂种鉴定遗传多样性遗传关系

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Early identification of stroke through deep learning with multi-modal human speech and movement data

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Neural Regeneration Research 2025年第1期20卷 234-241页

作者： Zijun Ou Haitao Wang Bin Zhang Haobang Liang Bei Hu Longlong Ren Yanjuan Liu Yuhu Zhang Chengbo dai Hejun Wu Weifeng Li Xin Li School of Computer Science and Engineering Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Department of Neurology Guangdong Neuroscience InstituteGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouGuangdong ProvinceChina Department of Emergency Medicine Guangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouGuangdong ProvinceChina

Early identification and treatment of stroke can greatly improve patient outcomes and quality of *** clinical tests such as the Cincinnati Pre-hospital Stroke Scale(CPSS)and the Face Arm Speech Test(FAST)are commonly used for stroke screening,accurate administration is dependent on specialized *** this study,we proposed a novel multimodal deep learning approach,based on the FAST,for assessing suspected stroke patients exhibiting symptoms such as limb weakness,facial paresis,and speech disorders in acute *** collected a dataset comprising videos and audio recordings of emergency room patients performing designated limb movements,facial expressions,and speech tests based on the *** compared the constructed deep learning model,which was designed to process multi-modal datasets,with six prior models that achieved good action classification performance,including the I3D,SlowFast,X3D,TPN,TimeSformer,and *** found that the findings of our deep learning model had a higher clinical value compared with the other ***,the multi-modal model outperformed its single-module variants,highlighting the benefit of utilizing multiple types of patient data,such as action videos and speech *** results indicate that a multi-modal deep learning model combined with the FAST could greatly improve the accuracy and sensitivity of early stroke identification of stroke,thus providing a practical and powerful tool for assessing stroke patients in an emergency clinical setting.

关键词： artificial intelligence deep learning diagnosis early detection FAST screening stroke

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我国家校社协同育人的价值意蕴、现实困境与实践进路

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西北成人教育学院学报 2025年第1期 5-10页

作者：勾月戴鼎盛沈阳师范大学教育科学学院辽宁沈阳110034

家校社协同育人作为现代教育的重要模式,往往通过学校、家庭与社会的联动合作,整合各方教育资源,促进学生的全面发展。首先分析家校社协同育人的价值意蕴,然后探讨当前实践中所面临的现实困境,具体包括信任缺失、沟通障碍、合作不均与... 详细信息

家校社协同育人作为现代教育的重要模式,往往通过学校、家庭与社会的联动合作,整合各方教育资源,促进学生的全面发展。首先分析家校社协同育人的价值意蕴,然后探讨当前实践中所面临的现实困境,具体包括信任缺失、沟通障碍、合作不均与机制存在缺陷等问题。针对这些困境,亟需采取相应的实践进路,包括开辟家校社透明沟通与多方互动的双重路径、提供家校社多元互动与双向反馈的双重保障、实现家校社权力优化与资源整合的双重提升、完善家校社制度保障与科学评价的双重构建。

关键词：家校社协同协同育人沟通优化信任机制制度保障

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