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Preparation, Crystallization and Mechanical Properties of Potassium Aluminosilicate Glass-ceramics

Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 587-595页

作者：郑伟宏黄猛 GAO Zipeng ZHANG Hang yuan jian TIAN Peijing PENG Zhigang State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Shahe Research Institute of Glass Technology Shahe 054100China

In this study,transparent K_(2)O-Al_(2)O_(3)-SiO_(2)(KAS)glass-ceramics with leucite as the main crystalline phase were prepared by melting-quench method and two-step heat *** effects of SiO_(2)/Al_(2)O_(3) ratio and heat treatment on crystallization and mechanical properties were *** crystallization kinetics and X-Ray Diffraction(XRD)results showed that SiO_(2)/Al_(2)O_(3) ratio and heat treatment system had a direct impact on the crystallization behavior of potassium aluminosilicate *** heat-treated at 680℃/2 h and 780℃/1 h,cracks generated on the surface of the sample with the addition of SiO_(2)/Al_(2)O_(3)=4.8(in mol)due to the huge difference in the coefficient of thermal expansion between glass matrix and *** the addition of SiO_(2)/Al_(2)O_(3)(in mol)was 4,the sample with leucite as the main crystalline phase showed an excellent fracture toughness(1.46 MPa·m^(0.5))after the heat treatment of 680℃/2 h and 780℃/5 *** there was a phase transformation from kaliophilite to *** crystalline phases of the sample heat-treated at 680℃/8 h and 780℃/1 h were leucite and kaliophilite,which resulted in the visible light transmittance of 63%and the fracture toughness of 0.91 MPa·m^(0.5).Furthermore,after the heat treatment of 680℃/2 h and 780℃/5 h,the main crystalline phase of the sample with SiO_(2)/Al_(2)O_(3)=3.2(in mol)was still *** leucite only grows on the surface of the sample and is hard to grow inward,it is hard to achieve the bulk crystallization of leucite in the sample with SiO_(2)/Al_(2)O_(3)=3.2(in mol).

关键词： leucite glass-ceramic kaliophilite crystallization kinetics

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Coordinated optimization of signal timing for intersections with dynamic shared through-and right-turn lanes

Journal of Intelligent and Connected Vehicles

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Journal of Intelligent and Connected Vehicles 2024年第3期7卷 219-228页

作者： Zhe Zheng jian yuan Kun An Nan Zheng Wanjing Ma The Key Laboratory of Road and Traffic Engineering Ministry of EducationTongji UniversityShanghai 201804China Department of Civil Engineering Monash UniversityMelbourne VIC 3800Australia

Through and right-turn shared lanes are widely designed to increase the capacity of through traffic,but they can also cause delays for right-turn *** study presents a dynamic control method for a shared lane that prioritizes right-turn vehicles at the beginning of the cycle and subsequently allows through traffic to queue in the shared lane for saturated *** traffic wave model is employed to reveal the dynamics of the traffic flow under this control and to derive the relationships among major traffic *** by the major relationship,a linear programming approach to minimize the total queue length is developed to determine the proper values of control parameters,including the shared area length,subordinate signal time lag,and shared or exclusive duration.A sensitivity analysis of the control parameters for different arrival rates and flow ratios is *** are conducted among the dynamic shared lane,the fixed exclusive lane,and the fixed shared *** results show that the dynamic control method results in a lower delay for both through and total traffic.

关键词： traffic control dynamic lane right-turn traffic optimization model

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Absence of metallicity and bias-dependent resistivity in low-carrier-density EuCd_(2)As_(2)

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 119-125页

作者： Yuxiang Wang jianwen Ma jian yuan Wenbin Wu Yong Zhang Yicheng Mou Jiaming Gu Peihong Cheng Wu Shi Xiang yuan Jinglei Zhang Yanfeng Guo Cheng Zhang State Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing Fudan UniversityShanghai 200433China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200241China Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory of the Chinese Academy of SciencesHefei 230031China School of Physics and Electronic Science East China Normal UniversityShanghai 200241China Zhangjiang Fudan International Innovation Center Fudan UniversityShanghai 201210China ShanghaiTech Laboratory for Topological Physics Shanghai 201210China

EuCd_(2)As_(2)was theoretically predicted to be a minimal model of Weyl semimetals with a single pair of Weyl points in the ferromagnet ***,the heavily p-doped Eu Cd_(2)As_(2)crystals in previous experiments prevent direct identification of the semimetal ***,we present a comprehensive magneto-transport study of high-quality Eu Cd_(2)As_(2)crystals with ultralow bulk carrier density(10^(13)cm^(-3)).In contrast to the general expectation of a Weyl semimetal phase,Eu Cd_(2)As_(2)shows insulating behavior in both antiferromagnetic and ferromagnetic states as well as surface-dominated conduction from band ***,the application of a dc bias current can dramatically modulate the resistance by over one order of magnitude,and induce a periodic resistance oscillation due to the geometric *** nonlinear transport results from the high nonequilibrium state induced by an electrical field near the band *** results suggest an insulating phase in Eu Cd_(2)As_(2)and put a strong constraint on the underlying mechanism of anomalous transport properties in this system.

关键词： magnetic Weyl semimetal quantum transport Hall effect nonlinear resistivity

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Design and Application of an S-band Fast Radio Bursts Search Pipeline for the Nanshan 26 m Radio Telescope

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Research in Astronomy and Astrophysics 2024年第7期24卷 111-117页

作者： Yan-Ling Liu Mao-Zheng Chen jian Li jian-Ping yuan Rai Yuen Zhi-Yong Liu Hao Yan Wen-Long Du Nan-Nan Zhai Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Microwave Technology Urumqi 830011China University of Chinese Academy of Sciences Beijing 100049China

Fast radio bursts(FRBs)are among the most studied radio transients in astrophysics,but their origin and radiation mechanism are still *** is a challenge to search for FRB events in a huge amount of observational data with high speed and high *** the rapid advancement of the FRB research process,FRB searching has changed from archive data mining to either long-term monitoring of the repeating FRBs or all-sky surveys with specialized ***,establishing a highly efficient and high quality FRB search pipeline is the primary task in FRB *** learning techniques provide new ideas for FRB search *** have detected radio bursts from FRB 20201124A in the L-band observational data of the Nanshan 26 m radio telescope(NSRT-26m)using the constructed deep learning based search pipeline named dispersed dynamic spectra search(DDSS).Afterwards,we further retrained the deep learning model and applied the DDSS framework to S-band *** this paper,we present the FRB observation system and search pipeline using the S-band *** carried out search experiments,and successfully detected the radio bursts from the magnetar SGR J1935+2145and FRB *** experimental results show that the search pipeline can complete the search efficiently and output the search results with high accuracy.

关键词： radio continuum general-methods data analysis-methods observational

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Malicious webshell family dataset for webshell multi-classification research

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Visual Informatics 2024年第1期8卷 47-55页

作者： Ying Zhao Shenglan Lv Wenwei Long Yilun Fan jian yuan Haojin jiang Fangfang Zhou School of Computer Science and Engineering Central South UniversityChangshaHunanChina Alibaba Cloud Intelligence Business Group Alibaba CloudBeijingChina

Malicious webshells currently present tremendous threats to cloud *** relevant studies and open webshell datasets consider malicious webshell defense as a binary classification problem,that is,identifying whether a webshell is malicious or ***,a fine-grained multi-classification is urgently needed to enable precise responses and active defenses on malicious webshell *** paper introduces a malicious webshell family dataset named MWF to facilitate webshell multiclassification *** dataset contains 1359 malicious webshell samples originally obtained from the cloud servers of Alibaba *** of them is provided with a family *** samples of the same family generally present similar characteristics or *** dataset has a total of 78 families and 22 ***,this paper introduces the human–machine collaboration process that is adopted to remove benign or duplicate samples,address privacy issues,and determine the family of each *** paper also compares the distinguished features of the MWF dataset with previous datasets and summarizes the potential applied areas in cloud security and generalized sequence,graph,and tree data analytics and visualization.

关键词： Open dataset Webshell Webshell family Cloud security

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Establishment of a cholangiocarcinoma risk evaluation model based on mucin expression levels

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1344-1360页

作者： Chun-yuan Yang Li-Mei Guo Yang Li Guang-Xi Wang Xiao-Wei Tang Qiu-Lu Zhang Ling-Fu Zhang jian-yuan Luo Department of Pathology Institute of Systems BiomedicineSchool of Basic Medical Sciences Peking UniversityPeking University Third HospitalPeking University Health Science CenterBeijing 100191China Department of General Surgery Peking University Third HospitalBeijing 100191China Department of Medical Genetics Department of Biochemistry and BiophysicsSchool of Basic Medical Sciences Peking UniversityPeking University Health Science CenterBeijing 100191China

BACKGROUND Cholangiocarcinoma(CCA)is a highly malignant cancer,characterized by frequent mucin ***1 has been identified as a critical oncogene in the progression of ***,the comprehensive understanding of how the mucin family influences CCA progression and prognosis is still *** To investigate the functions of mucins on the progression of CCA and to establish a risk evaluation formula for stratifying CCA *** Single-cell RNA sequencing data from 14 CCA samples were employed for elucidating the roles of mucins,complemented by bioinformatic ***-quent validations were conducted through spatial transcriptomics and *** construction of a risk evaluation model utilized the least absolute shrinkage and selection operator regression algorithm,which was further confirmed by independent cohorts and diverse data *** CCA tumor cells with elevated levels of MUC1 and MUC4 showed activated nucleotide metabolic pathways and increased ***5AC-high cells were found to promote CCA progression through WNT ***5B-high cells exhibited robust cellular oxidation activities,leading to resistance against antitumoral ***13-high cells were observed to secret chemokines,recruiting and transforming macrophages into the M2-polarized state,thereby suppressing antitumor ***16-high cells were found to promote tumor progression through interleukin-1/nuclear factor kappa-light-chain-enhancer of activated B cells signaling upon interaction with *** the expression levels of these mucins,a risk factor evaluation formula for CCA was developed and validated across multiple *** samples with higher risk factors exhibited stronger metastatic potential,chemotherapy resistance,and poorer *** Our study elucidates the functional mechanisms through which mucins contribute to CCA development,and provides tools for risk stratification in CCA.

关键词： Mucin Cholangiocarcinoma Single-cell RNA sequencing Spatial transcriptomics Prognosis

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High-performance broadband photodetector based on PtSe2/MoS2 heterojunction from visible to near-infrared region

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Science China(Information Sciences) 2024年第3期67卷 263-270页

作者： Bin WANG jian yuan Mengqi CHE Mingxiu LIU Yuting ZOU Junru AN Fan TAN Yaru SHI Nan ZHANG Liujian QI Shaojuan LI State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Applied Optics Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences School of Physics and Electronic Information Huaibei Normal University

Broadband photodetectors based on narrow bandgap 2D materials have garnered considerable interest for application in the field of optoelectronic devices. However, their large dark current hinders device performance. In this work, a PtSe2/MoS2heterojunction was fabricated for a broadband photodetector operating within the range of visible to near-infrared. The device exhibited suppressed dark currents with a high rectification ratio of 104. The built-in electric field of the heterojunction promoted carrier separation effectively, and the device achieved excellent photoelectric performance with responsivities of 1.7 × 103,27.52, and 21 mA/W at 635, 785, and 1550 nm wavelengths, respectively. Moreover, the specific detectivities(D*) were 2.2 × 1013Jones(635 nm), 3.55 × 1011Jones(785 nm), and 2.72 × 108Jones(1550 nm). The device demonstrated a rise/fall time of 131/241 μs under 1550 nm laser illumination. Visible and near-infrared imaging detection was also demonstrated based on the heterojunction device at room temperature. This work sheds light on the remarkable potential of PtSe2/MoS2heterojunctions in the domain of high-performance broadband photodetectors.

关键词： photodetector PtSe2/MoS2 heterojunction visible to near infrared high performance

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The Bright Single Pulse Emission from PSR B1133+16

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Research in Astronomy and Astrophysics 2024年第4期24卷 253-261页

作者： Jun Tan Zhi-Gang Wen Zhen Wang Xue-Feng Duan Hong-Guang Wang Na Wang Vishal Gajjar jian-Ping yuan Rai Yuen Wen-Ming Yan jian-Ling Chen Wei Han Hui Wang Cheng-Bing Lyu Ai-Jun Dong Maths and Information Technology School Yuncheng UniversityYuncheng 044000China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006China Space Science Laboratory University of CaliforniaBerkeley 94710USA Department of Physics and Electronic Engineering Yuncheng UniversityYuncheng 044000China School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550025China

We have conducted a comprehensive investigation into the bright single pulse emission from PSR B1133+16using the Giant Metrewave Radio *** time resolution data(61μs)were obtained at a center frequency of 322 MHz with a bandwidth of 32 MHz over a continuous observation period of 7.45 hr.A total of 1082 bright pulses were sporadically detected with peak flux densities ranging from 10 to 23 times stronger than the average pulse ***,no giant pulse-like emission with a relative pulse energy larger than 10 and extremely short duration was detected,indicating that these bright pulses cannot be categorized as giant pulse *** majority of these bright pulses are concentrated in pulse phases at both the leading and trailing windows of the average pulse profile,with an occurrence ratio of approximately *** pulse energy distribution for all individual pulses can be described by a combination of two Gaussian components and a cutoff power-law with an index of α=-*** updated nulling fraction of 15.35%±0.45% was determined from the energy *** emission of individual pulses follows a log-normal distribution in peak flux density *** is imperative that regular phase drifting in bright pulse sequence is identified in both the leading and trailing components for the first *** physical mechanisms are discussed in detail to provide insights into these observations.

关键词： (stars:)pulsars:general (stars:)pulsars:individual(PSR B1133+16) methods:observational methods:data analysis

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清朝边疆区域间的历史关联——基于思想与实践维度的认识

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史学理论研究 2024年第5期 75-83,158页

作者：袁剑中央民族大学民族学与社会学学院 100872

清朝奠定了现代中国版图的基础,这是清朝作为历史中国组成部分的最为重要的证据之一。同样,清朝对于广衰边疆区域治理的广度与深度也达到了前所未有的水平。我们不仅要对清朝的边疆治理政策与实践进行深入探究,还必须充分理解和认识清... 详细信息

清朝奠定了现代中国版图的基础,这是清朝作为历史中国组成部分的最为重要的证据之一。同样,清朝对于广衰边疆区域治理的广度与深度也达到了前所未有的水平。我们不仅要对清朝的边疆治理政策与实践进行深入探究,还必须充分理解和认识清朝边疆区域间存在的历史关联,进而理解这些边疆区域间关联具有的当代传承特质。这构成了我们理解中华民族“多元一体”结构中“多元间关系”的重要切入点,在此基础上形成的对于“多元”的连贯性认识,也有助于我们深化对中国疆域历史连续性及与之相伴的中华民族共同体结构完整性的理解。

关键词：清朝边疆区域历史关联传承

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边疆景观与天下空间——内蒙古锡林郭勒周边人文-地理景观的时空解读

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中央民族大学学报（哲学社会科学版） 2024年第3期51卷 97-103页

作者：袁剑中央民族大学民族学与社会学学院北京100081

对边疆景观的认知构成了理解整体地理秩序及其内在结构的重要方面,也是边疆思想史的重要内容之一,有助于我们思考中国边疆区域间关系的地理空间关联性,进而形成对于某一边疆时空结构的全面把握。作为我国重要生态过渡地带的内蒙古自治... 详细信息

对边疆景观的认知构成了理解整体地理秩序及其内在结构的重要方面,也是边疆思想史的重要内容之一,有助于我们思考中国边疆区域间关系的地理空间关联性,进而形成对于某一边疆时空结构的全面把握。作为我国重要生态过渡地带的内蒙古自治区锡林郭勒地区,其独特的人文-地理景观,如滦河源、元大都遗址、多伦汇宗寺等,构成了我们理解跨长城地带景观独特性的重要切入点,并以此来理解元-明-清时空关联性、作为整体的天下空间及其当代象征意义。本文将以此为主要内容展开具体论述与阐释,并提出相应的拓展性看法。

关键词：过渡地带边疆景观天下空间锡林郭勒

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