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High-pressure minerals and new lunar mineral changesite-(Y) in Chang’e-5 regolith

Matter and Radiation at Extremes 2024年第2期9卷 90-97页

作者： Jing Yang wei Du Center for Lunar and Planetary Sciences Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of Sciences(CAS)Guiyang 550081China CAS Center for Excellence in Comparative Planetology Hefei 230026China

Forty-five years after the Apollo and Luna missions, China’s Chang’e-5 (CE-5) mission collected ∼1.73 kg of new lunar materials from one ofthe youngest basalt units on the Moon. The CE-5 lunar samples provide opportunities to address some key scientific questions related to theMoon, including the discovery of high-pressure silica polymorphs (seifertite and stishovite) and a new lunar mineral, changesite-(Y). Seifertitewas found to be coexist with stishovite in a silica fragment from CE-5 lunar regolith. This is the first confirmed seifertite in returned lunarsamples. Seifertite has two space group symmetries (Pnc2 and Pbcn) and formed from an α-cristobalite-like phase during “cold” compressionduring a shock event. The aftershock heating process changes some seifertite to stishovite. Thus, this silica fragment records different stagesof an impact process, and the peak shock pressure is estimated to be ∼11 to 40 GPa, which is much lower than the pressure condition forcoexistence of seifertite and stishovite on the phase diagram. Changesite-(Y), with ideal formula (Ca_(8)Y)◻Fe^(2+)(PO_(4))_(7) (where ◻ denotes avacancy) is the first new lunar mineral to be discovered in CE-5 regolith samples. This newly identified phosphate mineral is in the form ofcolumnar crystals and was found in CE-5 basalt fragments. It contains high concentrations of Y and rare earth elements (REE), reaching upto ∼14 wt. % (Y,REE)2O3. The occurrence of changesite-(Y) marks the late-stage fractional crystallization processes of CE-5 basalts combinedwith silicate liquid immiscibility. These new findings demonstrate the significance of studies on high-pressure minerals in lunar materials andthe special nature of lunar magmatic evolution.

关键词： evolution minerals basalt

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Deep learning to develop zero-equation based turbulence model for CFD simulations of the built environment

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Building Simulation 2024年第3期17卷 399-414页

作者： Giovanni Calzolari wei Liu Division of Sustainable Buildings Department of Civil and Architectural EngineeringKTH Royal Institute of TechnologyBrinnelvägen 23Stockholm11428Sweden

This study aims to improve the accuracy and speed of predictions for thermal comfort and air quality in built environments by creating a coupled framework between computational fluid dynamics(CFD)simulations and deep learning *** coupling approach is showcased by the development of a data-driven turbulence *** new turbulence model is built using a deep learning neural network,whose mapping structure is based on a zero-equation turbulence model for built environment simulations,and is coupled with the CFD software OpenFOAM to create a hybrid *** neural network is a standard shallow multi-layer *** number of hidden layers and nodes per layer was optimized using Bayesan optimization *** framework is trained on an indoor environment case study,as well as tested on an indoor office simulation and an outdoor building array *** show that the deep learning based turbulence model is more robust and faster than traditional two-equation Reynolds average Navier-Stokes(RANS)turbulence models,while maintaining a similar level of *** model also outperforms the standard algebraic zero-equation model due to its superior ability to generalize to various flow *** some challenges,namely the mapping constraint,the limited training dataset size and the source of generation of training data,the hybrid framework demonstrates the viability of the coupling technique and serves as a starting point for future development of more reliable and advanced models.

关键词： neural networks computational fluid dynamics(CFD) turbulence model OpenFOAM

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Optimal retrofitting scenarios of multi-objective energy-efficient historic building under different national goals integrating energy simulation,reduced order modelling and NSGA-II algorithm

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Building Simulation 2024年第6期17卷 933-954页

作者： Hailu wei Yuanhao Jiao Zhe Wang wei Wang Tong Zhang School of Architecture Southeast UniversityNanjingJiangsu Province210096China Key Laboratory of Urban and Architectural Heritage Conservation(Southeast University) Ministry of EducationNanjingChina Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyHong KongChina HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute FutianShenzhenChina

Retrofitting a historic building under different national goals involves multiple objectives,constraints,and numerous potential measures and packages,therefore it is time-consuming and challenging during the early design *** study introduces a systematic retrofitting approach that incorporates standard measures for the building envelope(walls,windows,roof),as well as the heating,cooling,and lighting *** retrofit objectives are delineated based on prevailing Chinese *** retrofit measures function as genes to optimize energy-savings,carbon emissions,and net present value(NPV)by employing a log-additive decomposition approach through energy simulation techniques and NSGA-II,yielding 185,163,and 8 ***,a weighted sum method is proposed to derive optimal solutions across multiple *** framework is applied to a courtyard building in Nanjing,China,and the outcomes of the implementation are scrutinized to ascertain the optimal retrofit package under various *** this retrofit,energy consumption can be diminished by up to 63.62%,resulting in an NPV growth of 151.84%,and maximum rate of 60.48%carbon *** three result values not only indicate that the optimal values are achieved in these three aspects of energy saving,carbon reduction and economy,but also show the possibility of possible equilibrium in this multi-objective optimization *** framework proposed in this study effectively addresses the multi-objective optimization challenge in building renovation by employing a reliable optimization algorithm with a computationally efficient reduced-order *** provides valuable insights and recommendations for optimizing energy retrofit strategies and meeting various performance objectives.

关键词： historic building energy-efficient retrofitting building energy simulation log-additive decomposition approach NSGA-II

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流行语“店小二”的语义演变及其流行原因分析

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宿州学院学报 2020年第1期35卷 50-53页

作者：韦晴晴阜阳师范大学文学院安徽阜阳236037

通过对流行语“店小二”一词最初产生的意义和当下流行的意义对比发现其语义发生了一定程度的转变,因此对“店小二”一词的语义演变过程进行了研究.“店小二”原本指代的是具有服务特点的一类人,在各个历史时期都有称谓上的改变,最终流... 详细信息

通过对流行语“店小二”一词最初产生的意义和当下流行的意义对比发现其语义发生了一定程度的转变,因此对“店小二”一词的语义演变过程进行了研究.“店小二”原本指代的是具有服务特点的一类人,在各个历史时期都有称谓上的改变,最终流行语“店小二”完成了由最初的职业称谓转变为一种服务精神的语义转变,由具体变抽象.站在语言学的角度深入挖掘发现“店小二”之所以成为流行语是由接受者认知心理、表达者身份干扰以及社会文化发展潮流等因素造成的.

关键词：店小二修辞认知身份干扰文化潮流

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论汤显祖的诗学思想

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温州大学学报（社会科学版） 2011年第3期24卷 82-86页

作者：魏青青温州大学人文学院浙江温州325035

汤显祖是明代著名的戏曲家,不仅戏曲写得好,他的诗学思想也非常丰富。在发生论上,他提出"士奇则心灵,心灵则能飞动"的创作理念,反对前后七子的复古主义,提倡抒写性灵,不拘格套。在构成论上,他认为"世总为情,情生诗歌",万物之情,各有其... 详细信息

汤显祖是明代著名的戏曲家,不仅戏曲写得好,他的诗学思想也非常丰富。在发生论上,他提出"士奇则心灵,心灵则能飞动"的创作理念,反对前后七子的复古主义,提倡抒写性灵,不拘格套。在构成论上,他认为"世总为情,情生诗歌",万物之情,各有其志。在审美论上,他有着"情理统一"的美学追求。

关键词：汤显祖诗学思想发生论构成论审美论

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Well posedness analysis of a parabolic-hyperbolic free boundary problem for necrotic tumors growth

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International Journal of Biomathematics 2024年第5期17卷 257-283页

作者： wei Chen Xuemei wei School of Mathematics and Statistics Guangdong University of Technology Guangzhou 510520 P.R.China

In this paper,we study a free boundary problem of tumor growth with necrotic *** model is a parabolic-hyperbolic partial differential equations,which is composed of three first-order nonlinear hyperbolic equations,a parabolic equation and an ordinary differential ***,we obtained the approximation model by polishing the Heaviside function,and then proved the existence and uniqueness of the solution of the approximation *** addition,we improved the regularity of solution of the approximate problem by using the characteristic curves method,and finally proved the global existence of the weak solution of the original problem by the convergence.

关键词： Existence and uniqueness parabolic-hyperbolic free boundary Heaviside

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锂电池过充电测试深探究

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电源技术 2023年第2期47卷 172-175页

作者：王瑜潘逸卫青青郝丽浙江南都电源动力股份有限公司浙江杭州310000

对一款磷酸铁锂软包电芯进行分别在带夹具和不带夹具下的不同电流倍率环境的过充电测试。经实验,发现过充电电压曲线存在好几个不同斜率的电压上升阶段,以此现象为出发点,并结合相关文献及电化学原理,分析出可能造成该现象的内在原因。... 详细信息

对一款磷酸铁锂软包电芯进行分别在带夹具和不带夹具下的不同电流倍率环境的过充电测试。经实验,发现过充电电压曲线存在好几个不同斜率的电压上升阶段,以此现象为出发点,并结合相关文献及电化学原理,分析出可能造成该现象的内在原因。电压曲线还表明,电芯在不同条件下过充时均会出现一个固定的电压平台,通过分析认为该平台值很大程度上受过充电位影响,在极端情况下还会受电芯鼓胀以及过充电流值的影响。

关键词：锂电池过充电压平台电荷积累

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甲醇合成催化剂装填量扩容改造

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山东化工 2014年第8期43卷 115-118页

作者：魏青青河南能源化工集团中原大化甲醇事业部河南濮阳457000

通过分析甲醇合成催化剂较早老化的情况,得出甲醇反应器催化剂装填量过小的结论。提出并联增加反应器的解决方案,实施后经过运行总结,收到了很好的效果。

关键词：甲醇反应器并联催化剂

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空间站柔性机械臂辅助舱段对接动力学分析

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中国空间科学技术 2016年第3期36卷 24-31页

作者：危清清王耀兵唐自新张大伟空间智能机器人系统技术与应用北京重点实验室北京100094 北京空间飞行器总体设计部北京100094

为验证空间站柔性机械臂系统在有初始位置、姿态误差的情况下能否成功完成辅助舱段对接任务,文章建立了空间站柔性机械臂辅助舱段对接动力学模型,模型考虑了对接机构的接触碰撞,依据关节精细动力学模型、力矩控制方法和阻抗控制程序进... 详细信息

为验证空间站柔性机械臂系统在有初始位置、姿态误差的情况下能否成功完成辅助舱段对接任务,文章建立了空间站柔性机械臂辅助舱段对接动力学模型,模型考虑了对接机构的接触碰撞,依据关节精细动力学模型、力矩控制方法和阻抗控制程序进行了空间柔性机械臂辅助舱段对接过程仿真。仿真结果表明,当关节输出端位置测量精度为17位时,依靠阻抗控制的方法,空间柔性机械臂在主动舱存在最大位置误差150mm,最大姿态误差2.5°的情况下仍能完成对接;对接成功后,空间柔性机械臂系统控制力迅速下降,仍然能较好地保持构型,不会影响对接舱段的安全。

关键词：空间机械臂辅助对接关节动力学力矩控制阻抗控制

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Dynamic Simulation of Distribution Networks Using Multi-stage Discontinuous Galerkin Method

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 185-196页

作者： Ruizhi Yu wei Gu weiqi Liu Peixin Li wei Liu School of Electrical Engineering Southeast UniversityNanjing 210096China. the School of Electrical Engineering Southeast UniversityNanjing 210096China School of Automation Nanjing University of Science and TechnologyNanjing 210094China

Dynamic simulation plays a fundamental role in security evaluation of distribution networks(DNs).However,the strong stiffness and non-linearity of distributed generation(DG)models in DNs bring about burdensome computation and noteworthy instability on traditional methods which hampers the rapid response of simulation ***,a novel L-stable approximate analytical method with high accuracy is proposed to handle these *** method referred to as multistage discontinuous Galerkin method(MDGM),first derives approximate analytical solutions(AASs)of state variables which are explicit symbolic expressions concerning system ***,in each time window,it substitutes values for symbolic variables and trajectories of state variables are obtained *** paper applies MDGM to DG models to derive ***-truncation-error-based variable step size strategy is also developed to further improve simulation *** addition,this paper establishes detailed MDGM-based dynamic simulation *** case studies on a numerical problem,a modified 33-bus system and a practical large-scale DN,it can be seen that proposed method demonstrates fast and dependable performance compared with the traditional trapezoidal method.

关键词： Approximate analytical method distribution network distributed generation dynamic simulation multi-stage discontinuous Galerkin method variable step size

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