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A comparative study of extracellular sortilin neuropathology in transgenic Alzheimer’s disease model mice and human brain

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A comparative study of extracellular sortilin neuropathology...

中国解剖学会2019年年会

作者： Qilei Zhang fengqing zhou Xiaoxin Yan Department of Anatomy and Neurobiology Xiangya School of MedicineCentral South University

＜正＞Alzheimer’s disease （AD） is a devastating neurodegenerative disorder bearing multiple pathological hallmarks suggestive of complex cellular/molecular interplay during *** C-terminal fragments from sortilin,a ...

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山东农家栽培瓜蒌品种的同工酶研究

中药材 2005年第10期28卷 4-6页

作者：孙稚颖李恩波周凤琴山东中医药大学药学院山东省济南市第五人民医院济南250022

目的:鉴定山东不同农家栽培瓜蒌品种,并探讨它们的亲缘关系。方法:利用垂直平板聚丙烯酰胺凝胶电泳技术,作过氧化物酶同工酶和酯酶同工酶分析,并绘制指纹图谱。结果:瓜蒌不同农家栽培品种的过氧化物酶和酯酶同工酶酶谱有共有带,但酶带... 详细信息

目的:鉴定山东不同农家栽培瓜蒌品种,并探讨它们的亲缘关系。方法:利用垂直平板聚丙烯酰胺凝胶电泳技术,作过氧化物酶同工酶和酯酶同工酶分析,并绘制指纹图谱。结果:瓜蒌不同农家栽培品种的过氧化物酶和酯酶同工酶酶谱有共有带,但酶带数量、位点以及活性强度却有差异。结论:仁瓜蒌与牛心瓜蒌、小光蛋与野瓜蒌彼此间亲缘关系最近;明皮与小光蛋是两个不同的品种;同工酶分析技术可为山东产瓜蒌不同农家栽培品种的鉴定提供可靠依据。

关键词：瓜蒌农家栽培品种过氧化物酶同工酶酯酶同工酶山东

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面向排名预测的电影媒体网站研究

北京大学学报（自然科学版） 2019年第1期55卷 65-74页

作者：杨亮周逢清林原林鸿飞许侃大连理工大学信息检索研究室大连116023

结合排序学习方法,对电影排名预测任务进行研究。通过挖掘和分析电影媒体网站数据,完成对排名预测相关特征的抽取与扩展及排名标注的对齐和划分等,并提出面向电影媒体网站的排名预测模型。实验结果显示,该模型能有效地提高电影排名预测... 详细信息

结合排序学习方法,对电影排名预测任务进行研究。通过挖掘和分析电影媒体网站数据,完成对排名预测相关特征的抽取与扩展及排名标注的对齐和划分等,并提出面向电影媒体网站的排名预测模型。实验结果显示,该模型能有效地提高电影排名预测任务的性能,在为影视院线合理规划同期电影的上映时间及排片比例、为观影者提供优质热门的电影推荐等方面具有一定的应用价值。

关键词：电影排名预测排序学习数据挖掘电影媒体网站

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荆江历史变迁的阶段性特征

历史地理 1992年第1期 273-287页

作者：周风琴不详

前言荆江为长江的中游河段,东西横亘于江汉平原南部,北邻汉江南接洞庭,为长江中下游防洪最为险要的地段。该区大地构造单元属新华夏系的第二沉降带,第四纪以来新构造运动长期以沉降为主,第四系地层深厚可达130米以上,全新世冲湖相沉积... 详细信息

前言荆江为长江的中游河段,东西横亘于江汉平原南部,北邻汉江南接洞庭,为长江中下游防洪最为险要的地段。该区大地构造单元属新华夏系的第二沉降带,第四纪以来新构造运动长期以沉降为主,第四系地层深厚可达130米以上,全新世冲湖相沉积十分发育,荆江地区经历了由深切河谷的河网平原→云梦大泽→河湖平原的塑造过程,沧海桑田的巨变表现出时空特性和阶段特点。

关键词：中下游防洪中游河段第四系地层新华夏系时空特性新构造运动深切河谷沉降带

Parallel Physics-Informed Neural Networks Method with Regularization Strategies for the Forward-Inverse Problems of the Variable Coefficient Modified KdV Equation

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Journal of Systems Science & Complexity 2024年第2期37卷 511-544页

作者： zhou Huijuan School of Science Shanghai Maritime UniversityShanghai 201306China

This paper mainly introduces the parallel physics-informed neural networks(PPINNs)method with regularization strategies to solve the data-driven forward-inverse problems of the variable coefficient modified Korteweg-de Vries(VC-MKdV)*** the forward problem of the VC-MKdV equation,the authors use the traditional PINN method to obtain satisfactory data-driven soliton solutions and provide a detailed analysis of the impact of network width and depth on solving accuracy and ***,the author finds that the traditional PINN method outperforms the one with locally adaptive activation functions in solving the data-driven forward problems of the VC-MKdV *** for the data-driven inverse problem of the VC-MKdV equation,the author introduces a parallel neural networks to separately train the solution function and coefficient function,successfully addressing the function discovery problem of the VC-MKdV *** further enhance the network’s generalization ability and noise robustness,the author incorporates two regularization strategies into the *** amount of numerical experimental data in this paper demonstrates that the PPINNs method can effectively address the function discovery problem of the VC-MKdV equation,and the inclusion of appropriate regularization strategies in the PPINNs can improves its performance.

关键词： Data-driven forward-inverse problems parallel physics-informed neural networks regularization strategies variable coefficient modified KdV equation

Influence of stearic acid surface modification on flowability and agglomeration of battery grade Li_(2)CO_(3)powder

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Particuology 2024年第9期92卷 263-277页

作者： Ming zhou Lithium Industry Center Zhejiang New Era Zhongneng Technology Co.Ltd.Shaoxing312000China

This work investigates the flow and agglomeration behaviors of battery grade Li_(2)CO_(3)powder and the influence of stearic acid surface *** degree of agglomeration is directly related to the uniformity of Li_(2)CO_(3)and its powder *** to the Chinese National Nonferrous Metal Industry Standard,battery grade Li_(2)CO_(3)powder has D50 equal to 3–8μm which belongs to a micron-sized superfine ***,with the extension of storage time,the serious agglomeration phenomenon occurs due to the large specific surface area and rough and irregular powder *** Hausner ratio(HR)of the unmodified sample increases from 1.14 to 1.41,and the corresponding flowability is classified as good to ***,among samples with doping stearic acid,the optimum amount of it is 0.10 wt%which exhibits an extremely stable HR value from 1.14 to ***,after 156 days,the repose angle(AR)obtained for samples without surface modification and using 0.10 wt%stearic acid are calculated to be 49°and 28°,*** on the values of HR and AR,the flowability of the unmodified sample is poor while the sample modified with 0.10 wt%of stearic acid still maintain excellent powder flow ***,The LiMn_(2)O_(4)cathode material synthesized from modified Li_(2)CO_(3)powder with a stearic acid content of 0.10 wt%exhibits good crystallinity and comparable electrochemical performance to that prepared by commercial Li_(2)CO_(3).These results indicate that stearic acid has the potential to be an ideal modifier for battery grade Li_(2)CO_(3)powder that needs to be kept for a long time.

关键词： Battery grade Li_(2)CO_(3)powder Flowability Surface modification Stearic acid

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虚拟现实技术在职业技术教学中的应用

中小学实验与装备 2008年第1期18卷 5-6页

作者：周凤琴湖北省襄樊市航空工业学校 441105

在中等职业技术教育教学中应用虚拟现实技术，有利于培养学生提出问题、思考问题、解决问题的能力，有利于培养学生理论联系实际的科研能力，有利于培养学生的综合素质。虚拟现实技术根据其特点的体现程度和系统结构，一般地可分为简易... 详细信息

在中等职业技术教育教学中应用虚拟现实技术，有利于培养学生提出问题、思考问题、解决问题的能力，有利于培养学生理论联系实际的科研能力，有利于培养学生的综合素质。虚拟现实技术根据其特点的体现程度和系统结构，一般地可分为简易型虚拟现实系统、共享型虚拟现实系统和沉浸型虚拟系统三大类。

关键词：虚拟现实技术职业技术教学应用虚拟现实系统中等职业技术理论联系实际科研能力教育教学

Photoresponsive organogel and organized nanostructures of cholesterol imide derivatives with azobenzene substituent groups

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Progress in Natural Science:Materials International 2012年第1期22卷 64-70页

作者： Tifeng Jiao a,b,c,Yujin Wang a,fengqing Gao a,Jingxin zhou a,Faming Gao a a Hebei Key Laboratory of Applied Chemistry,College of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao 066004,China b College of Chemistry & Materials Engineering,Wenzhou University,Wenzhou 325027,China c State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China Hebei Key Laboratory of Applied Chemistry College of Environmental and Chemical Engineering Yanshan University Qinhuangdao 066004 China College of Chemistry & Materials Engineering Wenzhou University Wenzhou 325027 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

Two new cholesterol imide derivatives with azobenzene substituent groups have been *** compounds possess headgroups of hydrogen or methyl units,*** gelation test revealed that a subtle change in the headgroup of azobenzene segment produced a dramatic change in the gelation behavior of both *** compound with headgroups of hydrogen units only gelated N,N-Dimethylformamide(DMF),while the other compound with headgroups of methyl units cannot gelate any solvent tested *** DMF gel and solution of the gelator,the reversible photoisomerization transitions by irradiation with ultraviolet(UV) and visible light are investigated by UV-vis absorption spectra,Fourier transform infrared spectrometer,scanning electron microscope,atomic force microscope,and X-ray diffraction *** UV irradiation of the gel,trans-cis photoisomerization of the azobenzene groups occurs,the change in molecular polarity leads to the breaking of van der Waals interactions,resulting in the gel-sol *** gel can be recovered by the reverse cis-trans photoisomerization after exposure to visible *** and spectral studies reveal that the gelator molecules selfassemble into one-dimensional fibers,which further crossed-linked to form regular *** results afford useful information for the development of new versatile low molecular mass gelators and soft matter.

关键词： Organogel Cholesterol Azobenzene Photoisomerization Soft material

Phase field modeling of ferroelastic variant switching in yttria-stabilized t'zirconia with strain gradient elasticity and interface tension

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Science China(Technological Sciences) 2024年第5期67卷 1443-1457页

作者： zhou QianQian WEI YueGuang zhou YiChun YANG Li College of Engineering BIC-ESATPeking UniversityBeijing100871China School of Advanced Materials and Nanotechnology Xidian UniversityXi’an710126China Frontier Research Center of Thin Films and Coatings for Device Applications Academy of Advanced Interdisciplinary ResearchXidian UniversityXi’an710126China

The 6–8 wt%yttria-stabilized zirconia with a tetragonal structure(t’-YSZ)is extensively employed in thermal barrier *** exceptional fracture toughness of t’-YSZ can be attributed to its distinctive ferroelastic toughening *** and interface tension play a critical role in ferroelastic variant switching at the micro-and *** paper presents an original thermodynamically consistent phase field(PF)theory for analyzing ferroelastic variant switching at the micro-and nano-scale of t’-*** theory incorporates strain gradient elasticity using higher-order elastic energy and interface tension tensor via geometric nonlinearity to represent biaxial tension resulting from interface ***,a mixed-type formulation is employed to implement the higher-order theory through the finite element *** an interface in equilibrium,the effects of strain gradient elasticity result in a more uniform distribution of stresses,whereas the presence of interface tension tensor significantly amplifies the stress magnitude at the *** introduction of an interface tension tensor increases the maximum value of stress at the interface by a factor of 4 to *** nucleation and evolution of variants at a pre-existing crack tip in a mono-phase t’-YSZ have also been *** strain gradient elasticity is capable of capturing the size effect of ferroelastic variant switching associated with microstructures in ***,when the grain size approaches that of the specimen,the critical load required for variant switching at the crack tip increases,resulting in greater dissipation of elastic energy during ferroelastic variant ***,the interface tension accelerates the evolution of *** presented framework exhibits significant potential in modeling ferroelastic variant switching at the micro-and nano-scale.

关键词： thermodynamics strain gradient elasticity interface tension phase field method ferroelastic variant switching