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Thermodynamic properties of massless Dirac–Weyl fermions under the generalized uncertainty principle

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Chinese Physics B 2021年第7期30卷 132-138页

作者： Guang-Hua Xiong Chao-Yun Long he Su Department of Physics Guizhou UniversityGuiyang 550025China

The Dirac–Weyl equation characterized quasi-particles in the T3 lattice are studied under external magnetic field using the generalized uncertainty principle(GUP). The energy spectrum of the quasi-particles is found by the Nikiforov–Uvarov method. Based on the energy spectrum obtained, the thermodynamic properties are given, and the influence of the GUP on the statistical properties of systems is discussed. The results show that the energy and thermodynamic functions of massless Dirac–Weyl fermions in the T3 lattice depend on the variation of the GUP parameter.

关键词： T3 lattice massless Dirac–Weyl fermions generalized uncertainty principle thermodynamic property

The Secret Society＇s Secret： The Invoked Reality of the Tiandihui

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Frontiers of History in China 2016年第4期11卷 510-531页

作者： David Faure Xi he Department of History Chinese University ofHong Kong NT Hong Kong China

This essay examines two sets of reports in the Qing-dynasty Jiaqing and Daoguang periods （respectively 1796-1820 and 1821-45） in order to understand better the perceived reality of the Tiandihui. The first set, found anaong the papers of Jiangxi governor Xianfu （1809-14）, allows a comparison of a criminal gang that invoked the Tiandihui ceremony with one that did not. The second set includes the diary of Taihe county magistrate Xu Dihui （in office from 1824） that recorded various events which came to be reported to the senior officialdom as having been conducted by secret societies. By collating the incidents as reported in the diary and memorials to the emperor, the authors argue that the pressure of the administrative process was responsible for the ultimate acquiescence by the Hunan governor Han Wenqi （in office 1825-29） in the perception of an indisputable connection of the incidents with secret societies. Moreover, both sets of reports show that participants in secret-society ceremonies and officials who suppressed them knew that the acclaimed networking of the Tiandihui as implied in its folklore was very far from the reality.

关键词： Tiandihui Jiangxi criminal gangs brotherhoods secret societies diary

The study of lithographic variation in resistive random access memory

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Journal of Semiconductors 2024年第5期45卷 69-79页

作者： Yuhang Zhang Guanghui he Feng Zhang Yongfu Li Guoxing Wang Department of Micro-Nano Electronics Shanghai Jiao Tong UniversityShanghai 200240China MoE Key Lab of Artificial Intelligence Shanghai Jiao Tong UniversityShanghai 200240China Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China

Reducing the process variation is a significant concern for resistive random access memory(RRAM).Due to its ultrahigh integration density,RRAM arrays are prone to lithographic variation during the lithography process,introducing electrical variation among different RRAM *** this work,an optical physical verification methodology for the RRAM array is developed,and the effects of different layout parameters on important electrical characteristics are systematically *** results indicate that the RRAM devices can be categorized into three clusters according to their locations and lithography *** read resistance is more sensitive to the locations in the array(~30%)than SET/RESET voltage(he increase in the RRAM device length and the application of the optical proximity correction technique can help to reduce the variation to less than 10%,whereas it reduces RRAM read resistance by 4×,resulting in a higher power and area *** such,we provide design guidelines to minimize the electrical variation of RRAM arrays due to the lithography process.

关键词： layout lithography process variation resistive random access memory

Emission-Tunable Nanofluorophores through Self-assembly of Amphiphilic Block Copolymers:toward Application in Cell Imaging

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Chinese Journal of Chemistry 2023年第8期41卷 931-938页

作者： Shensong Zhang Shuang Qi Xiongfei he Pan Xu Bo Song College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu215123 China Physical Chemistry I&Research Center of Micro-and Nanochemistry and(Bio)Technology(Cμ) Department of Chemistry and BiologySchool of Science and TechnologyUniversity of SiegenAdolf-Reichwein-Str.257076 SiegenGermany

Comprehensive Summary Nanofluorophores based on aggregation-induced emission(AIE)dyes have recently received considerable attention because of their unique optical properties and *** this work,we report an emission-tunable nanofluorophore constructed by the self-assembly of an amphiphilic block copolymer(denoted by PTN).The diblock copolymer was synthesized by RAFT polymerization.A polyethylene glycol-based trithiocarbonate was employed as the macromolecular chain transfer agent,and a near-infrared emitting tetraphenylethylene derivative with a vinyl terminal group was designed as the *** block copolymers self-assembled in an aqueous solution to form nanospheres,which showed near-infrared emission at approximately 720 nm with a significant Stokes shift of approximately 260 ***,nanofluorophores have excellent biocompatibility,photostability,and pH-independent emission-tunable properties,and were successfully applied to label heLa cells for fluorescence imaging.

关键词： Block copolymers Nanoparticles Fluorescent probes Aggregation-induced emission Twisted intramolecular charge transfer

Preparation and characterization of polystyrene-based monolith with ordered macroporous structure

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Chinese Chemical Letters 2012年第4期23卷 474-477页

作者： Quan Zhou Wu Jian Feng he Ji Ming Ou College of Chinese Materia Medica Guangzhou University of Chinese MedicineGuangzhou 510006China

In this paper,polystyrene-based monoliths with highly ordered macroporous structure were synthesized by using SiO_2 colloidal crystal as *** observation shows that the macropores are highly ordered and are interconnected by small *** BET surface area of PS monolith is about 36.17 m^2/*** polymer monoliths can resist 5 MPa pressure,showing high mechanical and compressive strength.

关键词： Monolith Polystyrene Polymer Ordered macropore

Consolidation solution for composite foundation considering a time-and depth-dependent stress increment along with three distribution patterns of soil permeability

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第4期12卷 268-277页

作者： Meng-meng LU Kang-he XIE Chuan-xun LI Kun WANG State Key Laboratory for Geomechanics and Deep Underground Engineering School of Meehanics & Civil Engineering China University of Mining & Technology Xuzhou 221008 China MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering Zhejiang University Hangzhou 310058 China

In actual engineering practice,the stress increment within a composite foundation caused by external loads may vary simultaneously with depth and *** addition,column installation always leads to a decay of soil permeability towards the ***,almost none of the consolidation theories for composite foundation comprehensively consider these factors until *** this reason,a stress increment due to external loads changing simultaneously with time and depth was incorporated into the analysis,and three possible variation patterns of soil's horizontal permeability coefficient were considered to account for the detrimental influence of column *** three patterns included a constant distribution pattern(Pattern I),a linear distribution pattern(Pattern II),and a parabolic distribution pattern(Pattern III).Solutions were obtained for the average excess pore water pressures and the average degree of consolidation *** several special cases were discussed in detail based on the general solution ***,comparisons were made,and the results show that the present solution is the most general rigorous solution in the literature,and it can be broken down into a number of previous *** consolidation rate is accelerated with the increase in the value of the top to the bottom stress *** consolidation rate calculated by the solution for Pattern I is less than that for Pattern II,which in turn is less than that for Pattern III.

关键词： Consolidation Composite foundation Stone column Permeability Ramp load Disturbance effect

Artificial Sun synchronous frozen orbit control scheme design based on J_2 perturbation

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Acta Mechanica Sinica 2011年第5期27卷 809-816页

作者： Gong-Bo Wang Yun-he Meng Wei Zheng Guo-Jian Tang College of Aerospace and Material Engineering National University of Defense Technology410073 Changsha China

Sun synchronous orbit and frozen orbit formed due to J 2 perturbation have very strict constraints on orbital parameters,which have restricted the application a *** this paper,several control strategies were illustrated to realize Sun synchronous frozen orbit with arbitrary orbital elements using continuous ***,according to mean element method,the averaged rate of change of the orbital elements,originating from disturbing constant accelerations over one orbital period,was derived from Gauss＇ variation of parameters ***,we proposed that binormal acceleration could be used to realize Sun synchronous orbit,and radial or transverse acceleration could be adopted to eliminate the rotation of the argument of the ***,amending methods on the control strategies mentioned above were presented to eliminate the residual secular *** results showed that the control strategies illustrated in this paper could realize Sun synchronous frozen orbit with arbitrary orbital elements,and can save much more energy than the schemes presented in previous studies,and have no side effect on other orbital parameters＇ secular motion.

关键词： Continuous low-thrust Artificial Sun synchronous orbit Artificial frozen orbit Gauss' variation of parameters equations Mean element method

The significance of resource recycling for coking wastewater treatment:based on environmental and economic life cycle assessment

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Green Chemical Engineering 2024年第1期5卷 50-59页

作者： Di Zhang he Zhao Wenfang Gao Yuxing Sheng Hongbin Cao Institute of Process Engineering Innovation Academy for Green ManufactureChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China Chemistry&Chemical Engineering Data Center Chinese Academy of SciencesBeijing100190China Tianjin Key Laboratory of Clean Energy and Pollutant Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China

The sustainability of the coking industry is supported by reasonable production profit and environmental quality *** traditional measures substantially increased the related costs for enterprises to reach *** paper aims to develop a comprehensive cost combined environmental impact assessment method that is necessary for the analysis of wastewater treatment *** three coking wastewater treatment processes in China were *** showed that eutrophication dominantly contributed to the overall environmental *** effluent quality could significantly reduce the total environmental *** terms of an economic perspective,the price of raw materials was the main factor that affected the operating cost of comprehensive *** on subsystem analysis,the pretreatment stage accounted for the majority of environmental and cost burdens,respectively reaching 64%-78%and 64%-86%.Optimizing the pretreatment process by enhancing the efficiency of high concentration raw material recovery and substituting toxic raw materials for extractant could reduce the environmental impact and economic cost by 43.8%and 57%,respectively,which was an effective way to improve the potential performance of coking wastewater treatment plants(WWTPs).

关键词： Life cycle assessment Environmental impact Economic evaluation Coking wastewater treatment Resource recycling Comprehensive benefits

Estimation of the complex frequency of a harmonic signal based on a linear least squares method

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Geodesy and Geodynamics 2015年第3期6卷 220-225页

作者： he Meilin Xiu Yanxia Guangxi Polytechnic of Construction Institute of Surveying and Mapping Wuhan

In this study, we propose a simple linear least squares estimation method(LLS) based on a Fourier transform to estimate the complex frequency of a harmonic signal. We first use a synthetically-generated noisy time series to validate the accuracy and effectiveness of LLS by comparing it with the commonly used linear autoregressive method(AR). For an input frequency of 0.5 m Hz, the calculated deviations from the theoretical value were 0.004‰and 0.008‰ for the LLS and AR methods respectively; and for an input 5 10 6attenuation,the calculated deviations for the LLS and AR methods were 2.4% and 1.6%. Though the theory of the AR method is more complex than that of LLS, the results show LLS is a useful alternative method. Finally, we use LLS to estimate the complex frequencies of the five singlets of the0S2 mode of the Earth’s free oscillation. Not only are the results consistent with previous studies, the method has high estimation precisions, which may prove helpful in determining constraints on the Earth’s interior structures.

关键词： Harmonic signal Complex frequency Least squares es