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On the Range of Certain ASH Algebras of Real Rank Zero

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Chinese Annals of Mathematics,Series B 2023年第2期44卷 279-288页

作者： Qingnan AN zhichao liu School of Mathematics and Statistics Northeast Normal UniversityChangchun 130024China School of Mathematical Sciences Dalian University of TechnologyDalian 116024LiaoningChina

In this paper,the authors consider the range of a certain class of ASH algebras in[An,Q.,Elliott,G.A.,Li,*** liu,Z.,The classification of certain ASH C^(*)-algebras of real rank zero,***.,14(1),2022,183–202],which is under the scheme of the Elliott program in the setting of real rank zero C^(*)-*** a reduction theorem,they prove that all these ASH algebras are still the AD algebras studied in[Dadarlat,*** Loring,T.A.,Classifying C^(*)-algebras via ordered,mod-p K-theory,***.,305,1996,601–616].

关键词： Classification AD algebra Range Reduction

基于γ-C_(2)S的蜂窝陶瓷常温制备与性能研究

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材料导报 2025年第4期39卷 49-55页

作者：邹家伟刘志超王发洲武汉理工大学材料科学与工程学院武汉430070 武汉理工大学硅酸盐建筑材料国家重点实验室武汉430070

在污染排放物处理系统中,蜂窝陶瓷作为关键组件常常需要在高温条件下制备。提出一种新型制备方法,利用γ-C_(2)S在常温下通过碳化养护方式制备蜂窝陶瓷,避免了高温烧结。以γ-C_(2)S为原料,通过添加硅灰、减水剂、塑化剂和水等,调控坯... 详细信息

在污染排放物处理系统中,蜂窝陶瓷作为关键组件常常需要在高温条件下制备。提出一种新型制备方法,利用γ-C_(2)S在常温下通过碳化养护方式制备蜂窝陶瓷,避免了高温烧结。以γ-C_(2)S为原料,通过添加硅灰、减水剂、塑化剂和水等,调控坯料塑性,经碳化养护后获得力学性能优异的蜂窝陶瓷。研究了增稠剂掺量与预干燥制度对蜂窝陶瓷抗压强度的影响规律,分析了不同碳化时长下蜂窝陶瓷的强度发展与微观结构变化。结果表明:羟丙基甲基纤维素醚(HPMC)掺量为2.5%(质量分数,如无特别说明,下同),碳化养护前将试样预干燥至0.10剩余水固比,在0.3 MPa CO_(2)分压条件下养护12 h,试样抗压强度可达46.8 MPa。碳化过程中生成的方解石型碳酸钙填充了孔隙,使材料结构更加致密,这是蜂窝陶瓷试样强度迅速发展的主要原因。掺入2.5%TiO_(2)制成整体式蜂窝陶瓷催化剂,利用其光催化80 min后甲基橙降解率达到45.12%。

关键词： γ-C_(2)S 免烧结蜂窝陶瓷碳化力学性能 TiO_(2)负载

On the classification of certain real rank zero C^(*)-algebras

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Science China Mathematics 2022年第4期65卷 753-792页

作者： Qingnan An zhichao liu Yuanhang Zhang School of Mathematical Sciences Hebei Normal UniversityShijiazhuang050024China Department of Mathematics University of TorontoTorontoONM5S 2EACanada School of Mathematics Jilin UniversityChangchun130012China School of Mathematics and Statistics Northeast Normal UniversityChangchun 130024China School of Mathematical Sciences Dalian University of TechnologyDalian 116024China

In this paper,we give a classification of real rank zero C^(*)-algebras that can be expressed as inductive limits of a sequence of a subclass of Elliott-Thomsen algebras C.

关键词： Elliott-Thomsen algebra KK-theory KK-lifting mod-p K-theory classification

基于振动模态的复合绝缘子酥朽检测与诊断方法

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绝缘材料 2025年第2期58卷 110-120页

作者：刘志超郑书生陈闽江关安旭华北电力大学新能源电力系统全国重点实验室北京102206 国网福建省电力有限公司电力科学研究院福建福州350007 比亚迪股份有限公司广东深圳518118

首先对芯棒酥朽试样的理化特征进行分析,并研究芯棒酥朽对其力学性能的影响,然后利用仿真对复合绝缘子芯棒的振动模态进行分析,研究特征频率与酥朽程度的关系,最后针对酥朽复合绝缘子提出了一种振动激励检测方法,并对存在不同程度酥朽... 详细信息

首先对芯棒酥朽试样的理化特征进行分析,并研究芯棒酥朽对其力学性能的影响,然后利用仿真对复合绝缘子芯棒的振动模态进行分析,研究特征频率与酥朽程度的关系,最后针对酥朽复合绝缘子提出了一种振动激励检测方法,并对存在不同程度酥朽缺陷的110 kV复合绝缘子芯棒的振动模态特征频率进行测量分析。结果表明:芯棒中环氧树脂的完全降解以及玻璃纤维的水解、粉化使酥朽区域丧失力学性能,导致芯棒整体刚度、抗拉伸性能、抗形变性能降低;与完好芯棒相比,酥朽芯棒3~5阶振动模态的特征频率降低了2.8%~14.3%,高阶振动模态的特征频率降幅更明显,降幅随酥朽程度增大而增大。基于振动模态的酥朽检测方法可以对复合绝缘子的酥朽程度进行诊断,同时可以反映其力学性能变化,适用于复合绝缘子酥朽的无损检测。

关键词：复合绝缘子酥朽检测力学性能振动模态特征频率

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Design of modified model of intelligent assembly digital twins based on optical fiber sensor network

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Digital Communications and Networks 2024年第5期10卷 1542-1552页

作者： zhichao liu Jinhua Yang Juan Wang Lin Yue School of Opto-Electronic Engineering Changchun University of Science and TechnologyChangchun130000JilinChina Key Laboratory of Optoelectric Measurement and Optical Information Transmission Technology of Ministry of Education Changchun University of Science and TechnologyChangchun130000JilinChina Department of Actuarial Science and Business Analytics Macquarie UniversityNSW2109Australia

Intelligent assembly of large-scale,complex structures using an intelligent manufacturing platform represents the future development direction for industrial *** large-scale structural assembly processes,several bottleneck problems occur in the existing auxiliary assembly ***,the traditional LiDARbased assembly technology is often limited by the openness of the manufacturing environment,in which there are blind spots,and continuous online assembly adjustment thus cannot be ***,for assembly of large structures,a single-station LiDAR system cannot achieve complete coverage,which means that a multi-station combination method must be used to acquire the complete three-dimensional data;many more data errors are caused by the transfer between stations than by the measurement accuracy of a single station,which means that the overall system's measurement and adjustment errors are increased ***,because of the large numbers of structural components contained in a large assembly,the accumulated errors may lead to assembly interference,but the LiDAR-assisted assembly process does not have a feedback perception capability,and thus assembly component loss can easily be caused when assembly interference ***,this paper proposes to combine an optical fiber sensor network with digital twin technology,which will allow the test data from the assembly entity state in the real world to be applied to the"twin"model in the virtual world and thus solve the problems with test openness and data *** problem of station and perception feedback is also addressed and represents the main innovation of this *** system uses an optical fiber sensor network as a flexible sensing medium to monitor the strain field distribution within a complex area in real time,and then completes real-time parameter adjustment of the virtual assembly based on the distributed *** areas include areas that are laser-unreachable,areas wi

关键词： Digital twins Intelligent manufacturing Intelligent assembly Optical fiber sensor network Assembly condition monitoring algorithm

Outlier detection in near-infrared spectroscopic analysis by using Monte Carlo cross-validation

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Science China Chemistry 2008年第8期51卷 751-759页

作者： liu zhichao CAI WenSheng SHAO XueGuang Research Center for Analytical Sciences College of ChemistryNankai UniversityTianjin 300071China

An outlier detection method is proposed for near-infrared spectral analysis. The underlying philosophy of the method is that,in random test(Monte Carlo) cross-validation,the probability of outliers presenting in good models with smaller prediction residual error sum of squares(PRESS) or in bad models with larger PRESS should be obviously different from normal samples. The method builds a large number of PLS models by using random test cross-validation at first,then the models are sorted by the PRESS,and at last the outliers are recognized according to the accumulative probability of each sample in the sorted models. For validation of the proposed method,four data sets,including three published data sets and a large data set of tobacco lamina,were investigated. The proposed method was proved to be highly efficient and veracious compared with the conventional leave-one-out(LOO) cross validation method.

关键词： near-infrared spectrum partial least squares(PLS) Monte Carlo cross validation Outlier detection

中医传统健身功法从心身调治强直性脊柱炎的研究进展

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上海中医药杂志 2025年第2期59卷 86-92页

作者：刘智超陈薇薇上海中医药大学附属市中医医院上海200071

综述中医传统健身功法从心身调治强直性脊柱炎的研究进展。太极拳律动和谐、平衡阴阳,八段锦八式合一、身心共济,五禽戏形似猛兽、意随心动,易筋经洗筋伐髓、锻形炼神。强直性脊柱炎患者长期坚持传统功法锻炼能增加肌肉力量、减少骨量... 详细信息

综述中医传统健身功法从心身调治强直性脊柱炎的研究进展。太极拳律动和谐、平衡阴阳,八段锦八式合一、身心共济,五禽戏形似猛兽、意随心动,易筋经洗筋伐髓、锻形炼神。强直性脊柱炎患者长期坚持传统功法锻炼能增加肌肉力量、减少骨量丢失、缓解疼痛、提高平衡协调能力、促进心理健康。

关键词：强直性脊柱炎中医传统健身功法太极拳八段锦五禽戏易筋经非药物疗法研究进展

Chemoimmunotherapy in advanced esophageal squamous cell carcinoma:optimizing chemotherapy regimens for immunotherapy combinations

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Signal Transduction and Targeted Therapy 2022年第8期7卷 2646-2647页

作者： zhichao liu Jun liu Zhigang Li Department of Thoracic Surgery Shanghai Chest HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Esophageal Diseases Center Shanghai Jiao Tong UniversityShanghaiChina Department of Radiation Oncology Shanghai Chest HospitalShanghai Jiao Tong University School of MedicineShanghaiChina

A recent study published in BMJ by Lu et al.1 has reported the interim findings from the ORIENT-15,which is a global,multi-center and randomized phase 3 trial to compare chemoimmunotherapy to chemotherapy alone as first-line treatment in advanced esophageal squamous cell carcinoma(ESCC),and provoked thinking about the chemotherapy regimens for chemoimmunotherapy combinations.

关键词： immunotherapy esophageal regimen

Numerical Investigation on Porous Media Quenching Behaviors of Premixed Deflagrating Flame using RANS/LES Model

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Journal of Thermal Science 2019年第4期28卷 780-788页

作者： WEN Xiaoping SU Tengfei liu Zhigang XIE Maozhao WANG Fahui liu zhichao School of Mechanical and Power Engineering Henan Polytechnic UniversityJiaozuo 454003China Henan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources Henan Polytechnic UniversityJiaozuo 454003China The Boiler & Pressure Vessel Safety Inspection Institute of Henan Province Jiaozuo 454000China School of Energy and Power Engineering Dalian University of TechnologyDalian 116024China

To understand the mechanism of premixed flame quenching by porous media,a zonal hybrid RANS/LES model was employed,in which the LES flow solver was used to resolve the large turbulent structures within the non-porous region,while RANS was applied to porous media *** predicted results were compared with previous experimental *** it was evident that the premixed flame propagation rates and structure as well as quenching behaviors were reproduced by this numerical approach with a better *** to the inherently higher heat transfer coefficients between the solid and gas phases in porous media,the gas phase temperature has been decreased ***,upstream obstacles can cause the flame propagating faster and thus reduce the axial gas temperature gradients,resulting in the invalidity of the operation of premixed flame *** comparison with the case without upstream obstacle,the values of reaction rate attained in the case with three pairs of obstacles are higher,which makes a positive impact on the flame passing through the porous *** addition,the porous media with greater pore density has an excellent flame quenching property mainly owing to both the larger volumetric heat transfer and higher quenching temperature.

关键词： RANS/LES model porous media quenching flame propagation