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One-step device-independent quantum secure direct communication

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Science China(Physics,Mechanics & Astronomy) 2022年第5期65卷 1-12页

作者： Lan Zhou yu-Bo sheng School of Science Nanjing University of Posts and TelecommunicationsNanjing 210003China College of Electronic and Optical Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China Institute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China

Device-independent quantum secure direct communication(DI-QSDC)can relax the security assumptions about the devices’internal working,and effectively enhance QSDC’s *** this paper,we put forward the first hyperentanglement-based one-step DI-QSDC *** this protocol,the communication parties adopt the nonlocal hyperentanglement-assisted complete Bell state analysis,which enables the photons to transmit in the quantum channel for only one *** one-step DI-QSDC can directly transmit 2 bits of messages by a hyperentangled photon pair,and is unconditionally secure in *** with the original DI-QSDC protocol(***.65,12(2020)),the one-step DI-QSDC protocol can simplify the experiment and reduce the message *** particular,with the help of the hyperentanglement heralded amplification and the hyperentanglement purification,the message loss and the message error caused by the channel noise can be completely eliminated,and the communication distance can be largely *** using the photon source with a repetition rate of 10 GHz,the one-step DI-QSDC’s secret message capacity under 50 km communication distance achieves about 7 bit/s with the initial fidelity in each degree of freedom of *** with the quantum repeater,it is possible for researchers to realize the one-step DI-QSDC with an arbitrarily long distance.

关键词： device-independent quantum secure direct communication hyperentanglement nonlocal Bell state analysis

A New Kind of k-Quantum Nonlinear Coherent States： Their Generation and PhysicalMeaning

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Communications in Theoretical Physics 2004年第6期41卷 935-940页

作者： WANGJi-Suo LIUTang-Kun FENGJian SUNJin-zuo ZHANMing-sheng DepartmentofPhysics YantaiUniversityYantai264005China StateKeyLaboratoryofMagneticResonanceandAtomicandMolecularPhysics WuhanInstituteofPhysicsandMathematicstheChineseAcademyofSciencesWuhan430071China DepartmentofPhysics LiaochengUniversityLiaocheng252059China

A new kind of k-quantum nonlinear coherent states,i.e.,the k eigenstates of the k-th power~k (k≥3) of the generalized annihilation operator=1/f() of f-oscillators,are obtained and their properties are *** completeness of the k states is *** alternative method to construct them is *** is shown that these states may form a complete Hilbert space,and all of them can be generated by a linear superposition of k Roy-type nonlinear coherent ***,they can be generated by a linear superposition of the time-dependent Roy-type nonlinear coherent states at different instants.

关键词： orthonormalized eigenstate k-quantum nonlinear coherent states completeness physical meaning

Role of decay in the search for double-charm baryons

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Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 27-28页

作者： Fu-sheng yu School of Nuclear Science and Technology Lanzhou University

Double-charm baryons,whose components are two heavy charm quarks and one light quark,are part of a large family of hadrons predicted by the quark *** on them are helpful to understand the hadron structure and the nature of the strong *** efforts expended over decades of searching,experimental measurements achieved a breakthrough with the first observation of the double-charm baryon of■^++cc(ccu)via■^++cc→Λ^+c K^-π^+π^+ by the LHCb collaboration in 2017[1].Since then,the LHCb collaboration has been leading the experimental studies for doubly charmed baryons[2-6]because they are produced in considerably large numbers in the Large Hadron Collider(LHC).

关键词： interaction. quark double

Parameter optimization for microwave coupled with hot air drying process of hawthorn slices using response-surface methodology

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International Journal of Agricultural and Biological Engineering 2015年第2期8卷 121-134页

作者： yu Haiming zuo Chuncheng Xie Qiuju College of Mechanical Science and Engineering Jilin UniversityChangchun 130022China College of Engineering Heilongjiang Bayi Agricultural UniversityDaqing 163319Heilongjiang ProvinceChina College of Information Technology Heilongjiang Bayi Agricultural UniversityDaqing 163319Heilongjiang ProvinceChina

The microwave coupled with hot air(MCHA)drying method was used in this test to dry hawthorn slices The effect of initial microwave power density level(6 W/g to 12 W/g),hot air temperature(55℃ to 70℃),and hot air velocity(1 m/s to 3 m/s)on the quality attributes of rehydration ratio(Rf),organic acid(OA)and ascorbic acid(AA)of the dehydrated hawthorn slices was analyzed using a response surface *** orthogonal rotatable central composite with three factors and at five levels was used to develop predictive regression models for the *** prediction mathematical model of Rf,OA and AA of the hawthorn slice was determined by analysis of *** and response variables as well as the prediction mathematical model,the optimal drying process of Rf,OA and AA of the hawthorn slice were determined by using the Design-Expert *** comprehensive optimal conditions were as follows:initial microwave power density 12 W/g,hot air temperature 55℃ and hot air velocity 1.56 m/s.

关键词： parameter optimization response surface methodology hot air drying microwave hawthorn slice

Moving target defense:state of the art and characteristics

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Frontiers of Information Technology & Electronic Engineering 2016年第11期17卷 1122-1153页

作者： Gui-lin CAI Bao-sheng WANG Wei HU Tian-zuo WANG College of Computer National University of Defense Technology

Moving target defense(MTD) has emerged as one of the game-changing themes to alter the asymmetric situation between attacks and defenses in cyber-security. Numerous related works involving several facets of MTD have been published. However, comprehensive analyses and research on MTD are still absent. In this paper, we present a survey on MTD technologies to scientifically and systematically introduce, categorize, and summarize the existing research works in this field. First, a new security model is introduced to describe the changes in the traditional defense paradigm and security model caused by the introduction of MTD. A function-and-movement model is provided to give a panoramic overview on different perspectives for understanding the existing MTD research works. Then a systematic interpretation of published literature is presented to describe the state of the art of the three main areas in the MTD field, namely, MTD theory, MTD strategy, and MTD evaluation. Specifically,in the area of MTD strategy, the common characteristics shared by the MTD strategies to improve system security and effectiveness are identified and extrapolated. Thereafter, the methods to implement these characteristics are concluded. Moreover, the MTD strategies are classified into three types according to their specific goals, and the necessary and sufficient conditions of each type to create effective MTD strategies are then summarized, which are typically one or more of the aforementioned characteristics. Finally, we provide a number of observations for the future direction in this field, which can be helpful for subsequent researchers.

关键词： Moving target defense Security model Function-and-movement model Characteristics

New advances in small molecule hole-transporting materials for perovskite solar cells

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Chinese Chemical Letters 2016年第8期27卷 1293-1303,1469页

作者： Ya-Kun Wang zuo-Quan Jiang Liang-sheng Liao Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University

Organic π-functional molecules are the foundation and basic component of organic optoelectronic *** example,for ideal carrier transporting materials,extended π-conjugation and ordered π-πstacking are necessary to enhance the charge mobility and achieve desirable *** a promising way to convert sunlight into electricity,organometal halide perovskite solar cells（PSCs） have captured a lot of attention due to its predominant merits especially in the aspect of remarkable photovoltaic performance and much potentially low production *** conventional planar PSC structure,hole-transporting layer which typically consists of organic π-functional materials plays a key role in suppressing holeelectron pair recombination,promoting charge transporting and ensuring ohmic contact of back *** the key roles of HTMs and its soaring progress in recent years,here,we will summarize recent progress in small organic π-functional materials from its diverse functions in ***,aiming to further promote the development of organic π-functional molecules and HTMs,a promising direction toward highly efficient HTMs will also be discussed.

关键词： Perovskite solar cell Photovoltaic device Small molecule Conjugated structure Hole-transporting material

Approximation by Neural Networks with Sigmoidal Functions

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Acta Mathematica Sinica,English Series 2013年第10期29卷 2013-2026页

作者： Dan sheng yu Department of Mathematics Hangzhou Normal University

In this paper, we introduce a type of approximation operators of neural networks with sigmodal functions on compact intervals, and obtain the pointwise and uniform estimates of the ap- proximation. To improve the approximation rate, we further introduce a type of combinations of neurM networks. Moreover, we show that the derivatives of functions can also be simultaneously approximated by the derivatives of the combinations. We also apply our method to construct approximation operators of neural networks with sigmodal functions on infinite intervals.

关键词： Feedforward neural networks sigmoidal functions simultaneous approximation combi-nations

First-principles investigations of proton generation inα-quartz

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Chinese Physics B 2018年第3期27卷 368-375页

作者： yunliang yue yu Song Xu zuo College of Electronic Information and Optical Engineering Nankal UniversityTianjin 300071China Microsystem and Terahertz Research Center China Academy of Engineering PhysicsChengdu 610200China Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621999China Municipal Key Laboratory of Photo-electronic Thin Film Devices and Technology Nankai UniversityTianjin 300071China

Proton plays a key role in the interface-trap formation that is one of the primary reliability concerns, thus learning how it behaves is key to understand the radiation response of microelectronic devices. The first-principles calculations have been applied to explore the defects and their reactions associated with the proton release in a-quartz, the well-known crystalline isomer of amorphous silica. When a high concentration of molecular hydrogen （H2） is present, the proton generation can be enhanced by cracking the He molecules at the positively charged oxygen vacancies in dimer configuration. If the concentration of molecular hydrogen is low, the proton generation mainly depends on the proton dissociation of the doubly- hydrogenated defects. In particular, a fully passivated E~ center can dissociate to release a proton barrierlessly by structure relaxation once trapping a hole. This research provides a microscopic insight into the proton release in silicon dioxide, the critical step associated with the interface-trap formation under radiation in microelectronic devices.

关键词： first-principles calculation interface trap proton silicon dioxide

Tribological Properties of Ti-DLC Coatings on Piston-pin Surfaces

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1136-1146页

作者： LIU Jiliang XIANG Jianhua zuo Zhengxing XIE Guoxin LUO Jun sheng Yongqing School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China College of Quality&Safety Engineering China Jiliang UniversityHangzhou 310018China State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China Beijing Radiation Center Beijing 100875China

A magnetically filtered cathode vacuum arc deposition system was used to deposit Ti-doped diamond-like carbon coatings(Ti-DLC)on pin surfaces to improve the wear resistance of high-power density diesel engine piston *** coating structure,composition,and morphology were characterised using field emission scanning electron microscopy(FE-SEM),X-ray photoelectron spectroscopy(XPS),Raman spectroscopy,and other *** tests were carried out using a universal tribometer to study the tribological properties of pins with or without coatings under dry friction and oil *** surface morphology and cross-sectional morphology of the Ti-DLC coating show that the coating has a uniform crosssection and good surface *** XPS spectrum shows that the coating contains Ti-C,Ti-C*,sp2-C,sp3-C,and C-O/C=*** spectroscopy shows that there is an amorphous carbon phase in the Ti-DLC *** friction test shows that the friction temperature increase of the pin with the Ti-DLC coating is lower than that without the coating,especially under dry-friction *** the end of the test,the difierence in temperature increase is 16.7%.The friction coefficient when using high-viscosity lubricating oil with a coating is relatively lower than that without a coating,especially under low-speed and heavy-duty *** the dryfriction state,the coated surface has better wear resistance than the uncoated surface,which primarily manifests as abrasive wear,and the surface without a coating mainly experiences adhesive wear.

关键词： high-power density diesel engine piston pin Ti-DLC coating tribological properties