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Classification of Spherical Fusion Categories of Frobenius–Schur Exponent 2

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Algebra Colloquium 2021年第1期28卷 39-50页

作者： zheyan wan Yilong wang Yau Mathematical Sciences Center Tsinghua University Beijing 100084China Department of Mathematics Louisiana State University Baton RougeLA 70803USA

In this paper,we propose a new approach towards the classification of spherical fusion categories by their Frobenius–Schur *** classify spherical fusion categories of Frobenius–Schur exponent 2 up to monoidal *** also classify modular categories of Frobenius–Schur exponent 2 up to braided monoidal *** turns out that the Gauss sum is a complete invariant for modular categories of Frobenius–Schur exponent *** result can be viewed as a categorical analog of Arf's theorem on the classification of non-degenerate quadratic forms over fields of characteristic 2.

关键词： spherical fusion category modular category Frobenius-Schur exponent Arf invariant Gauss sum

Limit of crustal drilling depth

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Journal of Rock Mechanics and Geotechnical Engineering 2017年第5期9卷 989-992页

作者： Y.S.zhao z.J.Feng B.P.Xi D.Yang W.G.Liang z.J.wan Key Laboratory of In Situ Property-improving Mining of Ministry of Education Taiyuan University of Technology College of Mining Engineering China University of Mining and Technology

Deep drilling is becoming the direct and the most efficient means in exploiting deep mineral resources,facilitating to understanding the earthquake mechanism and performing other scientific researches on the Earth’s *** order to understand the limit of drilling depth in the Earth’s crust,we first conducted tests on granite samples with respect to the borehole deformation and stability under high temperature and high pressure using the triaxial servo-controlled rock testing *** the critical temperaturepressure coupling conditions that result in borehole instability are ***,based on the testing results obtained and the requirements for the threshold values of borehole deformations during deep drilling,the limit of drilling depth in the Earth’s crust is formulated with ground temperature.

关键词： Drilling well Limit of drilling depth High temperature High pressure Borehole instability

A method of determining flame radiation fraction induced by interaction burning of tri-symmetric propane fires in open space based on weighted multi-point source model

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Frontiers in Energy 2022年第6期16卷 1017-1026页

作者： Jie JI Junrui DUAN Huaxian wan State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230026China Institute of Advanced Technology University of Science and Technology of ChinaHefei 230088China

The interaction of multiple fires may lead to a higher flame height and more intense radiation flux than a single fire,which increases the possibility of flame spread and risks to the *** were conducted using three burners with identical heat release rates(HRRs)and propane as the fuel at various *** results show that flames change from non-merging to merging as the spacing decreases,which result in a complex evolution of flame height and merging point *** facilitate the analysis,a novel merging criterion based on the dimensionless spacing S/z_(c) was *** non-merging flames(S/z_(c)>0.368),the flame height is almost identical to a single fire;for merging flames(S/z_(c)≤0.368),based on the relationship between thermal buoyancy B and thrust P(the pressure difference between the inside and outside of the flame),a quantitative analysis of the flame height,merging point height,and air entrainment was formed,and the calculated merging flame heights show a good agreement with the measured experimental ***,the multi-point source model was further improved,and radiation fraction of propane was *** data obtained in this study would play an important role in calculating the external radiation of propane fire.

关键词： flame interaction air entrainment flame height multi-point source model thermal radiation

Intrinsic Self-Healing Chemistry for Next-Generation Flexible Energy Storage Devices

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Nano-Micro Letters 2023年第7期15卷 136-164页

作者： Xin wan Tiansheng Mu Geping Yin MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China

The booming wearable/portable electronic devices industry has stimulated the progress of supporting flexible energy storage *** performance of flexible devices not only requires the component units of each device to maintain the original performance under external forces,but also demands the overall device to be flexible in response to external ***,flexible energy storage devices inevitably occur mechanical damages(extrusion,impact,vibration)/electrical damages(overcharge,over-discharge,external short circuit)during longterm complex deformation conditions,causing serious performance degradation and safety *** by the healing phenomenon of nature,endowing energy storage devices with self-healing capability has become a promising strategy to effectively improve the durability and functionality of ***,this review systematically summarizes the latest progress in intrinsic self-healing chemistry for energy storage ***,the main intrinsic self-healing mechanism is ***,the research situation of electrodes,electrolytes,artificial interface layers and integrated devices based on intrinsic self-healing and advanced characterization technology is ***,the current challenges and perspective are *** believe this critical review will contribute to the development of intrinsic self-healing chemistry in the flexible energy storage field.

关键词： Flexible energy storage Intrinsic self-healing chemistry Lithium-ion battery Supercapacitor Advanced characterizations

基于熵权-TOPSIS模型结合特征图谱的蜜麸枳壳原料产地优选及质量标准提升研究

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中草药 2024年第1期55卷 68-76页

作者：万理祝婧杨明谌瑞林陈泣易炳学罗薏江西中医药大学江西南昌330004 江西江中中药饮片有限公司江西九江332300

目的基于工业化生产条件进行蜜麸枳壳质量标准研究,并优选优势原料产地。方法参照《中国药典》2020年版方法对18批不同产地来源的蜜麸枳壳进行显微、薄层色谱鉴别,测定水分、总灰分、醇溶性浸出物含量,通过色差仪测定饮片粉末色度,采... 详细信息

目的基于工业化生产条件进行蜜麸枳壳质量标准研究,并优选优势原料产地。方法参照《中国药典》2020年版方法对18批不同产地来源的蜜麸枳壳进行显微、薄层色谱鉴别,测定水分、总灰分、醇溶性浸出物含量,通过色差仪测定饮片粉末色度,采用HPLC法测定其中柚皮苷和新橙皮苷含量,建立了特征图谱,采用聚类分析、正交偏最小二乘-判别分析(orthogonal partial least squares-discrimination analysis,OPLS-DA)等方法对结果进行分析,并利用熵权-逼近理想解排序法(technique for order preference by similarity to ideal solution,TOPSIS)评价各批次蜜麸枳壳质量。结果蜜麸枳壳各指标结果均符合《中国药典》2020年版要求,通过建立的蜜麸枳壳特征图谱,得到15个共有峰,指认了6号峰为柚皮苷,7号峰为橙皮苷,8号峰为新橙皮苷,11号峰为橙皮素,12号峰为川陈皮素,13号峰为甜橙黄酮,15号峰为橘红素,聚类分析结果表明,18批蜜麸枳壳样品可聚为4类;通过OPLS-DA法筛选出新橙皮苷、峰10、橙皮素、川陈皮素、峰9、峰5为主要差异成分。熵权-TOPSIS法结果表明,湖南省沅江蜜麸枳壳综合质量最优,推荐以该地枳壳为生产原料。结论方法简便易行,可用于蜜麸枳壳的质量控制;通过熵权-TOPSIS模型以评价蜜麸枳壳综合质量,并反向溯源筛选优势原料产地,可为蜜麸枳壳产业化生产过程中的质量提升提供参考。

关键词：蜜麸枳壳质量评价特征图谱熵权法逼近理想解排序法色度柚皮苷新橙皮苷橙皮素川陈皮素

Effective method for tracking multiple objects in real-time visual surveillance systems

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Journal of Systems Engineering and Electronics 2009年第6期20卷 1167-1178页

作者： wang Yaonan wan Qin Yu Hongshan Coll. of Electrical and Information Engineering Hunan Univ. Changsha 410082 P. R. China

An object model-based tracking method is useful for tracking multiple objects, but the main difficulties are modeling objects reliably and tracking objects via models in successive frames. An effective tracking method using the object models is proposed to track multiple objects in a real-time visual surveillance system. Firstly, for detecting objects, an adaptive kernel density estimation method is utilized, which uses an adaptive bandwidth and features combining colour and gradient. Secondly, some models of objects are built for describing motion, shape and colour features. Then, a matching matrix is formed to analyze tracking situations. If objects are tracked under occlusions, the optimal ＂visual＂ object is found to represent the occluded object, and the posterior probability of pixel is used to determine which pixel is utilized for updating object models. Extensive experiments show that this method improves the accuracy and validity of tracking objects even under occlusions and is used in real-time visual surveillance systems.

关键词： visual surveillance multiple object tracking object model matching matrix.

逆相变退火对中锰钢组织演变和力学性能的影响

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金属热处理 2024年第6期49卷 36-42页

作者：安庆生万德成马少康李杰张千禧华北理工大学冶金与能源学院河北唐山063210

对0.22C-3.97Mn-1.57Si-0.1Al-0.043Nb中锰钢进行预淬火处理获得板条状马氏体的初始组织,再进行不同温度的逆相变退火处理。采用扫描电镜(SEM)、X射线衍射仪(XRD)等组织表征手段以及拉伸试验机研究试验钢微观组织演变及力学性能。结果表... 详细信息

对0.22C-3.97Mn-1.57Si-0.1Al-0.043Nb中锰钢进行预淬火处理获得板条状马氏体的初始组织,再进行不同温度的逆相变退火处理。采用扫描电镜(SEM)、X射线衍射仪(XRD)等组织表征手段以及拉伸试验机研究试验钢微观组织演变及力学性能。结果表明,经逆相变退火后室温组织为板条状铁素体、马氏体和残留奥氏体。随退火温度升高,试验钢的抗拉强度逐渐升高,屈服强度逐渐降低,伸长率和强塑积先升高后降低。退火温度为670~690℃时,多相组织协调变形,残留奥氏体TRIP效应明显,试验钢表现出优异的力学性能。退火温度为690℃时,试验钢获得最佳力学性能,抗拉强度为1062 MPa,断后伸长率为27.0%,强塑积达到28.7 GPa·%。退火温度高于690℃时,马氏体占比高,残留奥氏体机械稳定性差,试验钢抗拉强度提高但塑性下降;铁素体加工硬化能力增加,残留奥氏体机械稳定性下降,抑制吕德斯带和锯齿流变出现。

关键词：逆相变退火残留奥氏体中锰钢力学性能

Key Technology of Embedded System Implementation for Software-based CNC System

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Chinese Journal of Mechanical Engineering 2010年第2期23卷 217-224页

作者： wan Jiafu LI Di zHANG Ping College of Computer Science and Engineering South China University of Technology Guangzhou 510006 China School of Mechanical and Automotive Engineering South China University of Technology Guangzhou 510640 China Department of Computer Guangdong College of Mechanical and Electrical Technology Guangzhou 510515 China

The software-based computer numerical control（CNC） system includes three types of tasks： periodic real-time tasks, aperiodic real-time tasks, and non-real-time tasks. The tasks are characterized by concurrency, hybridization, and correlation, which make system implementation difficult. The conventional scheduling algorithm can not meet the demands of system implementation in the software-based CNC system completely. The uncertainty factors when running real-time tasks affect control performance by degrading manufacturing accuracy as a result of system resource and processor use restrictions. To address the technical difficulty of embedded system implementation, a novel fuzzy feedback scheduling algorithm based on output jitter of key real-time tasks for a software-based CNC system is proposed. Time characteristics, such as sampling jitter, input-output jitter, and non-schedulability are discussed, followed by quantification through simulations of the impact of time characteristics on manufacturing accuracy. On the basis of this research, the scheduler architecture is designed, and then the algorithm table is calculated. When the system resource changes, the key periodic real-time tasks meet their deadlines by means of dynamically adjusting the task period. The simulated results show that the machining precision rises by an order of magnitude for the proposed scheduler in resource-constrained software-based CNC systems. Moreover, unlike conventional feedback scheduling methods, the algorithm in this paper does not rely on the availability of task execution times and is easy to implement while incurring only a small overhead.

关键词： software-based CNC system embedded system implementation output jitter fuzzy feedback scheduling manufacturing accuracy

基于“调神”理论针刺治疗慢性疲劳综合征的临床疗效及对外周血辅助性T细胞1/辅助性T细胞2平衡的影响

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河北中医 2024年第2期46卷 283-286,291页

作者：万敏周林湖北省武汉市中医医院医学检验科湖北武汉430050

目的观察基于“调神”理论指导的针刺治疗慢性疲劳综合征(CFS)患者的疗效及对外周血辅助性T细胞1(Th1)/Th2平衡的影响。方法将90例CFS患者按照随机数字表法分为2组,对照组45例予常规针刺法进行治疗,治疗组45例采用基于“调神”理论指导... 详细信息

目的观察基于“调神”理论指导的针刺治疗慢性疲劳综合征(CFS)患者的疗效及对外周血辅助性T细胞1(Th1)/Th2平衡的影响。方法将90例CFS患者按照随机数字表法分为2组,对照组45例予常规针刺法进行治疗,治疗组45例采用基于“调神”理论指导的针刺法治疗。2组均治疗4周。比较2组治疗前后疲劳量表-14(FS-14)、疲劳评定量表(FAI)、汉密尔顿焦虑量表(HAMA)评分及血清干扰素γ(IFN-γ)、白细胞介素4(IL-4)水平,并统计2组总有效率。结果治疗组总有效率93.33%(42/45),对照组总有效率77.78%(35/45),治疗组临床疗效优于对照组(P<0.05)。2组治疗后FS-14躯体疲劳评分、脑力疲劳评分及总分均较本组治疗前降低(P<0.05),且治疗组治疗后均低于对照组(P<0.05)。2组治疗后FAI、HAMA评分均较本组治疗前降低(P<0.05),且治疗组治疗后均低于对照组(P<0.05)。2组治疗后血清IFN-γ水平及IFN-γ/IL-4均较本组治疗前升高(P<0.05),且治疗组治疗后均高于对照组(P<0.05),2组治疗后IL-4水平均降低(P<0.05),且治疗组治疗后低于对照组(P<0.05)。结论基于“调神”理论指导的针刺治疗CFS患者疗效显著,能够改善患者疲劳、焦虑状态,促进Th1/Th2平衡。

关键词：慢性疲劳综合征针刺疗法调神法焦虑