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entanglement quantification via weak measurements assisted by deep learning

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Photonics Research 2024年第4期12卷 712-719页

作者： MU YANG YA XIAO ZE-YAN HAO YU-WEI LIAO JIA-HE cAO KAI SUN en-HUI WANG ZHenG-HAO LIU YUTAKA SHIKANO JIN-SHI XU cHUAN-FenG LI GUANG-cAN guo cAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China college of Physics and Optoelectronic.engineering Ocean University of ChinaQingdao 266100China cAS center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China Electric Power Research Institute State Grid Anhui Electric Power Co.Ltd.Hefei 230601China Institute of Systems and Information engineering University of TsukubaIbaraki 305-8573Japan center for Artificial Intelligence Research University of TsukubaIbaraki 305-8577Japan Graduate School of Sc.ence and Technology Gunma UniversityGunma 371-8510Japan Institute for Quantum Studies Chapman UniversityOrangeCalifornia 92866USA JST PRESTO Saitama 332-0012Japan

entanglement has been recognized as being crucial when implementing various quantum information ***, quantifying entanglement for an unknown quantum state requires nonphysical operations or post-processing measurement data. For example, evaluation methods via quantum state tomography require vast amounts of measurement data and likely estimation.

关键词： estimation quantum angle

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Regulation of Ti(c,N)deposition on hot surface of refractory in blast furnace hearth

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Journal of Iron and Steel Research International 2024年第6期31卷 1423-1435页

作者： Jian cao cui Wang Jjan-liang Zhang Ke-xin Jiao guo-hua Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Metallurgical and Ecological engineering University of Science and Technology BeijingBeijing 100083China

Ti(c,N)concentration was found to be lower on the hearth sidewall of a blast furnace and increased gradually toward the bottom of the blast *** Ti(c,N)protective layer in a blast furnace is ***,the formation of a Ti(c,N)protective layer was promoted by studying the heterogeneous nucleation principle of titanium compounds on different substances and regulation measures for the deposition process of titanium compounds on refractories or *** lattice disregistry between the titanium compounds and the main components in the refractory or the main impurities in the protective layer was calculated using a two-dimensional disregistry equation to study the heterogeneous nucleation principle of titanium *** results revealed that in refractory materials,the heterogeneous nucleation of carbonitride is weak when c,SiO_(2),and Al_(2)O_(3) are used as heterogeneous nucleation substrates,and the heterogeneous nucleation of carbonitride is strong when TiO_(2) and Sic are used as heterogeneous nucleation *** nucleation phases,Tic,TiN,Ti(c_(0.3),N_(0.7)),and Ti(c_(0.5),N_(0.5))have similar heterogeneous nucleation ability in single component refractory,and the type of carbonitride has little effect on the lattice *** impurities in the protective layer as the substrate phases are not conducive to the heterogeneous nucleation of *** caS was used as the substrate phase,the heterogeneous nucleation ability of carbonitride was the *** carbon and alumina were not conducive to the heterogeneous nucleation of carbonitride,but carbon was more unfavourable than alumina.

关键词： Ti(c,N) Lattice disregistry Lattice constant Heterogeneous nucleation Regulation measure

Metal-Free Synthesis of 2-Aminobenzothiazoles via I2-catalyzed Tandem cyclization Reaction of Amines and carbon Disulfide

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chinese Journal of chemistry 2024年第8期42卷 846-852页

作者： Ting c.en Wei Feng Ruitong Yang Shanping c.en guo-Jun Deng Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtanHunan411105 China School of chemistry and chemical engineering Henan Normal UniversityXinxiangHunan453007 China

comprehensive Summary,A convenient approach for the construction of 2-aminobenzothiazoles via I2-catalyzed tandem cyclization reaction of amines and carbon disulfide has been *** present approach starts from simple and readily available starting materials,affording a series of 2-aminobenzothiazoles in up to 89%yields under metal-free *** this work,c—H/N—H functionalization was achieved and multiple c-hetero bonds were successfully constructed in one pot.

关键词： Sulfur heterocycles c-H functionalization cyclization Tandem reaction Transition-metal-free Amines lodine N-Heterocycles

Thic.ening progression mechanism of silica fume-oil well cement composite system at high temperatures

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Petroleum Sc.ence 2024年第4期21卷 2793-2805页

作者： Hang Zhang Miao-Miao Hu Peng-Peng Li guo-Qing Liu Qing-Lu chang Jie cao Ming Liu Wen-Hua Xu Xiu-Jian Xia Jin-Tang guo School of chemical engineering and Technology Tianjin University Zhejiang Institute of Tianjin University Haihe Laboratory of Sustainable chemical Transformations cNPc.engineering Technology R&D company Limited

This work studied the thic.ening progression mechanism of the silica fume-oil well cement composite system at high temperatures(110-180.c) in order to provide a theoretical guidance for the rational application of silica fume in the cementing engineering. Results showed that silica fume seldom affected the thic.ening progression of oil well cement slurry at 110-120.c, but when temperature reached above130.c, it would aggravate the bulging degree of thic.ening curves and significantly extend the thic.ening time, meanwhile causing the abnormal “temperature-based thic.ening time reversal” and“dosage-based thic.ening time reversal” phenomena in the range of 130-160.c and 170-180.c respectively. At 130-160.c, the thic.ening time of oil well cement slurry was mainly associated with the generation rate of calcium hydroxide(cH) crystal. The introduced silica fume would be attracted to the cement minerals' surface that were hydrating to produce cH and agglomerate together to form an“adsorptive barrier” to hinder further hydration of the inner cement minerals. This “adsorptive barrier”effect strengthened with the rising temperature which extended the thic.ening time and caused the occurrence of the “temperature-based thic.ening time reversal” phenomenon. At 170-180.c, the pozzolanic activity of silica fume significantly enhanced and considerable amount of c-S-H was generated, thus the “temperature-based thic.ening time reversal” vanished and the “dosage-based thic.ening time reversal” was presented.

关键词： Silica fume Oil well cement Thic.ening time reversal Pozzolanic reaction Adsorptive barrier cH and c−S−H

A Note on the Signless Laplacian Spectral Ordering of Graphs with Given Size

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Journal of Mathematical Research with Applications 2024年第3期44卷 304-312页

作者： Nannan LIU Shuguang guo School of Mathematics and Statistics Qinghai Normal University School of Mathematics and Statistics Yancheng Teachers University

Abstract For a simple undirected graph G with fixed size m≥2k （k∈Z+） and maximum degree?（G）≤m-k,we give an upper bound on the signless Laplacian spectral radius q（G）of *** two connected graphs G1and G2with size m≥8,employing this upper bound,we prove that q（G1）>q（G2） if?（G1）>?（G2）+1 and■.For triangle-free graphs,we prove two stronger *** an application,we completely characterize the graph with maximal signless Laplacian spectral radius among all graphs with size m and circumference c for m≥max{2c,c+9},which partially answers the question proposed by c.en et ***[Linear Algebra Appl.,2022,645:123–136].

关键词： signless Laplacian spectral radius upper bound ordering size circumference

二维层状Ti_(3)c_(2)T_(x)的制备方法及其摩擦学应用研究进展

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复合材料学报 2024年第5期41卷 2201-2219页

作者：易美荣覃靖国刘子征郭烈恩南昌大学先进制造学院南昌330031

二维层状材料不仅具有极高的承载能力,并且凭借其超薄的厚度在摩擦过程能较容易地进入摩擦接触区。因此,它们在减少摩擦和磨损方面具有巨大的研究和应用潜力。Mxenes作为一种类似于石墨烯的二维层状材料,具有独特的结构和丰富的官能团,... 详细信息

二维层状材料不仅具有极高的承载能力,并且凭借其超薄的厚度在摩擦过程能较容易地进入摩擦接触区。因此,它们在减少摩擦和磨损方面具有巨大的研究和应用潜力。Mxenes作为一种类似于石墨烯的二维层状材料,具有独特的结构和丰富的官能团,其中Ti_(3)c_(2)T_(x)Mxenes因低层间剪切阻力、高比表面积、良好的分散性等优点而被广泛用作润滑添加剂。本文主要介绍了二维层状Ti_(3)c_(2)T_(x)的主要制备方法,包括“自上而下”和“自下而上”两种制备路线。同时对二维Ti_(3)c_(2)T_(x)作为液体润滑剂添加剂、固体润滑涂层添加剂、复合材料增强相的摩擦学应用及效果进行综述,并对其润滑机制进行了探讨。进一步对二维Ti_(3)c_(2)T_(x)的制备技术的发展和其作为新型润滑材料的应用前景作出展望。

关键词： MXenes 二维Ti_(3)c_(2)T_(x) 润滑添加剂摩擦学性能润滑机制

维普期刊数据库

Tropical cyclone activities in the Western North Pacific in 2022

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Tropical cyclone Research and Review 2024年第2期13卷 125-135页

作者： Xin Huang Lina Bai Zifeng Yu Johnny c.L.chan Hui Yu Jie Tang Rong guo Rijin Wan Shanghai Typhoon Institute China Meteorological AdministrationShanghaiChina Asia-Pacific Typhoon collaborative Research center ShanghaiChina School of energy and environment City University of Hong KongHong KongChina

Based on the best-track dataset from the Shanghai Typhoon Institute/china Meteorological Administration,the paper provides a compre-hensive summary and analysis of tropical cyclone(Tc)activities in the Western North Paciﬁc(WNP)and the South china Sea(ScS)for *** the historical climatology from 1951 to 2020,the anomalous conditions during 2022 in Tc frequency,origin locations,tracks,intensity,and duration for the entire ocean basin as well as landfall events in china are *** show that the overall Tc frequency is slightly lower than normal,but the multiple Tc events have a very high frequency of *** locations of Tcs,which mark the starting points of their paths,show a large westward and northward deviation from *** 40%of the named Tcs exhibit a shift in their direction of movement from westerly to ***,comparisons of the means,medians,upper and lower quartiles all indicate that the intensity of Tcs in 2022 is generally lower than the climatology,with the duration of Tcs at tropical storm intensity or above being shorter than usual.A notable observation is the fewer incidence of Tc landfalls in china,but with a geographical concentration in Guangdong *** anomalous annual Tc activities are inﬂuenced by related atmospheric and oceanic.environmental conditions modulated by multi-scale climate ***ﬁndings provide useful information for enhancing disaster mitigation strategies in the Asia-Paciﬁc region.

关键词： Tropical cyclone Western North Pacific Anomalous characteristics Annual report

NiS ultrafine nanorod with translational and rotational symmetry

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National Sc.ence Review 2024年第7期11卷 218-225页

作者： Jianxin Kang Qi Hu Ruixuan Zhang Ang Gao Zhongning Huang Ziming Su Ke Pei Qinghua Zhang Li-Min Liu Renchao che Lin Gu Er-Jia guo Lin guo School of chemistry Beihang University Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative Materials Academy for Engineering&Technology Fudan University Zhejiang Laboratory Beijing National center for Electron Microscopy and Laboratory of Advanced Materials School of Materials Science and Engineering Tsinghua University Beijing National Laboratory for condensed Matter Physics and Institute of Physics Chinese Academy of Sciences School of Physics Beihang University

Anisotropy is a significant and prevalent characteristic of materials, conferring orientation-dependent properties, meaning that the creation of original symmetry enables key functionality that is not found in nature. Even with the advancements in atomic machining, synthesis of separated symmetry in different directions within a single structure remains an extraordinary challenge. Here, we successfully fabricate NiS ultrafine nanorods with separated symmetry along two directions. The atomic structure of the nanorod exhibits rotational symmetry in the radial direction, while its axial direction is characterized by divergent translational symmetry, surpassing the conventional crystalline structures known to date. It does not fit the traditional description of the space group and the point group in three dimensions, so we define it as a new structure in which translational symmetry and rotational symmetry are separated. Further corroborating the atomic symmetric separation in the electronic structure, we observed the combination of stripe and vortex magnetic domains in a single nanorod with different directions, in accordance with the atomic *** manipulation of nanostructure at the atomic level introduces a novel approach to regulate new properties finely, leading to the proposal of new nanotechnology mechanisms.

关键词： separated symmetry NiS anisotropy structure atomic machining magnetic domain

cr-assisted low-temperature densification of(Ti,Zr,Nb,Ta,Mo)c high-entropy carbides with ultrafine grain and enhanced hardness

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Journal of Advanced ceramics 2024年第6期13卷 780-788页

作者： Yang Liu Jiaji Liang Weiming guo Shikuan Sun Yu Tian Hua-Tay Lin School of Electromechanical engineering Guangdong University of TechnologyGuangzhou 510006China State Key Laboratory of High Performance Tools Guangdong University of TechnologyGuangzhou 510006China School of Material Sc.ence and energy engineering Foshan UniversityFoshan 528000China

While the use of low-melting-point metals as sintering aids for high-entropy carbide(HEc)ceramics has been well established,their existence can compromise hardness due to residual metallic *** study demonstrates an innovative strategy to meet this challenge,where(Ti,Zr,Nb,Ta,Mo)c high-entropy carbide ceramics with ultrafine grains and enhanced hardness are obtained through chromium(cr)-metal-assisted spark plasma sintering(SPS)at a temperature as low as 1600℃.The results show that the addition of 5 vol%cr promotes the formation of highly densified single HEc phase ceramics with a high relative density(98.4%)and an ultrafine-grained microstructure(0.17μm).This low-temperature densification mechanism can be attributed to cr’s solid-solution effect within the matrix and the increased carbon vacancies generated during *** grain size of the(Ti,Zr,Nb,Ta,Mo)c ceramics with 5 vol%cr metal addition is significantly smaller than that of cr-free(Ti,Zr,Nb,Ta,Mo)c ceramics sintered at 2000℃(3.03μm)or via traditional low-temperature liquid-phase sintering(1.3–1.5μm).Importantly,the addition of 5 vol%cr substantially increased the hardness of the ceramics,with a remarkable increase from 23.57 to 28.16 GPa compared to that of the pure(Ti,Zr,Nb,Ta,Mo)c ceramics,owing to the fine-grain strengthening and solid-solution strengthening *** work highlights the uniqueness of cr metal as a sintering aid in achieving densification and hardness improvements in(Ti,Zr,Nb,Ta,Mo)c ceramics,offering a promising strategy for improving the properties of HEc materials for further development in the near future.

关键词： solid solution sinterability hardness enhancement (Ti,Zr,Nb,Ta,Mo)c high-entropy carbide(HEc)ceramics