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Buffer-atom-mediated quantum logic gates with off-resonant modulated driving

Science China(Physics,Mechanics & Astronomy) 2024年第12期67卷 48-60页

作者： yuan sun CAS Key Laboratory of Quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

Connectivity of two-qubit logic gates plays a crucial and indispensable role in quantum computation *** the cold atom qubit platform,while the two-qubit Rydberg blockade gate has recently made rapid experimental progress,a pressing challenge is to improve connectivity in pursuit of genuine scalability without sacrificing speed or fidelity.A significant advancement in this direction can be achieved by introducing an extra buffer atom to extend the two-qubit gate beyond purely nearest-neighbor two-body *** buffer atom couples with the two qubit atoms through nearest-neighbor interactions,even though the qubit atoms do not directly exert any physical influence on each *** established method of off-resonant modulated driving(ORMD)is not only convenient but also lays the groundwork for this latest *** the atomic linkage structure here exhibits more complex interactions compared to previous two-body systems,the population can satisfactorily return to the ground state after the ground-Rydberg transition with a properly designed modulation *** can be achieved through one-photon and two-photon ground-Rydberg transitions in common ***,with buffer atom relay or similar structures,it is possible to realize a two-qubit entangling gate between two distant qubit *** addition to demonstrating that such solutions are feasible,the representative modulation patterns are analyzed,showcasing the versatility of buffer-atom-mediated two-qubit *** a broader perspective,these efforts enhance the resemblance between the cold atom qubit platform and the superconducting qubit system,with the buffer atom functioning like wires and junctions.

关键词： cold atom qubit Rydberg blockade effect quantum logic gate quantum control theory geometric phase

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Establishment of paternity testing system using microsatellite markers in Chinese Holstein

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Journal of Genetics and Genomics 2008年第5期35卷 279-284页

作者： Fei Tian Dongxiao sun yuan Zhang College of Animal Science and Technology and Key Laboratory of Animal Genetics and Breeding of Ministry of Agriculture China Agricultural University Beijing 100094 China

To estimate the efficiency of microsatellite markers in paternity testing among Chinese Holstein, 30 microsatellite loci were used to differentiate 330 Chinese Holstein genotypes, according to the calculation of the allele frequency, number of alleles, effective number of alleles, genetic heterozygosity, polymorphic information content （PIC）, and the exclusion probability in this cattle population. The results demonstrated that the exclusion probability ranged from 0.620 in locus BM1818 to 0.265 in locus INRA005 with the average of 0.472 and 11 microsatellite markers exceeding 0.5. The combined exclusion probability of nine microsatellite markers was over 0.99. The result showed that paternity testing of Chinese Holstein was basically resolved using the nine microsatellite markers selected.

关键词： Chinese Holstein rnicrosatellite paternity testing exclusion probability

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Leveraged fault identification method for receiver autonomous integrity monitoring

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Chinese Journal of Aeronautics 2015年第4期28卷 1217-1225页

作者： sun yuan Zhang Jun Xue Rui School of Electronic and Information Engineering Beihang University

Receiver autonomous integrity monitoring（RAIM） provides integrity monitoring of global positioning system（GPS） for safety-of-life *** the process of RAIM, fault identification（FI） enables navigation to continue in the presence of fault *** by satellite geometry, the leverage of each measurement in position solution may differ ***, the conventional RAIM FI methods are generally based on maximum likelihood of ranging error for different measurements, thereby causing a major decrease in the probability of correct identification for the fault measurement with high *** this paper, the impact of leverage on the fault identification is *** leveraged RAIM fault identification（L-RAIM FI） method is proposed with consideration of the difference in leverage for each satellite in ***,the theoretical probability of correct identification is derived to evaluate the performance of L-RAIM FI *** experiments in various typical scenarios demonstrate the effectiveness of L-RAIM FI method over conventional FI methods in the probability of correct identification for the fault with high leverage.

关键词： Fault identification Global positioning system Leverage Navigation systems Receiver autonomousintegrity monitoring

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Treatment of desizing wastewater from the textile industry by wet air oxidation

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Journal of Environmental Sciences 2000年第3期12卷 290-295页

作者： LEI Le-cheng sun yuan Department of Environmental Science and Engineering College of Chemical EngineeringZhejiang UniversityHangzhou 310027China.

This paper describes the application of wet air oxidation to the treatment of desizing wastewater from two textile companies. A two\|liter high temperature, high pressure autoclave reactor was used in the study. The range of operating temperatures examined was between 150 and 290℃, and the partial pressure of oxygen ranged from 0.375 to 2.25 MPa. Variations in pH, COD Cr and TOD content were monitored during each experiment and used to assess the extent of conversion of the process. The effects of temperature, pressure and reaction time were explored extensively. More than 90% COD Cr reduction and 80% TOC removal have been obtained. The results have also been demonstrated that WAO is a suitable pre\|treatment methods due to improvement of the BOD\-5/COD\-\{Cr\} ratio of desizing wastewater. The reaction kinetics of wet air oxidation of desizing wastewater has been proved to be two steps, a fast reaction followed by a slow reaction stage.

关键词： wet air oxidation wastewater treatment textile wastewater

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A survey on run-time supporting platforms for cyber physical systems

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Frontiers of Information Technology & Electronic Engineering 2017年第10期18卷 1458-1478页

作者： yuan sun Gang YANG Xing-she ZHOU School of Computer Science and Engineering Northwestern Polytechnical University Xi'an 710072 China

Cyber physical systems(CPSs) incorporate computation, communication, and physical processes. The deep coupling and continuous interaction between such processes lead to a significant increase in complexity in the design and implementation of CPSs. Consequently, whereas developing CPSs from scratch is inefficient, developing them with the aid of CPS run-time supporting platforms can be efficient. In recent years, much research has been actively conducted on CPS run-time supporting platforms. However, few surveys have been conducted on these platforms. In this paper, we analyze and evaluate existing CPS run-time supporting platforms by first classifying them into three categories from the viewpoint of software architecture: component-based platforms, service-based platforms, and agent-based platforms. Then, for each type, we detail its design philosophy, key technical problems, and corresponding solutions with specific use cases. Subsequently, we compare existing platforms from two aspects: construction approaches for CPS tasks and support for non-functional properties. Finally, we outline several important future research issues.

关键词： Cyber physical system(CPS) Run-time supporting platforms Component Service Agent

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Transformer real-time reliability model based on operating conditions

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第3期8卷 378-383页

作者： HE Jian CHENG Lin sun yuan-zhang State Key Laboratory of Power Systems Department of Electrical Engineering Tsinghua University Beijing 100084 China

Operational reliability evaluation theory reflects real-time reliability level of power system. The component failure rate varies with operating conditions. The impact of real-time operating conditions such as ambient temperature and transformer MVA (megavolt-ampere) loading on transformer insulation life is studied in this paper. The formula of transformer failure rate based on the winding hottest-spot temperature (HST) is given. Thus the real-time reliability model of transformer based on oper- ating conditions is presented. The work is illustrated using the 1979 IEEE Reliability Test System. The changes of operating conditions are simulated by using hourly load curve and temperature curve, so the curves of real-time reliability indices are ob- tained by using operational reliability evaluation.

关键词： Operational reliability Real-time reliability model Transformer Winding hottest-pot temperature (HST)

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On the emergence of gravitational dynamics from tensor networks

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Communications in Theoretical Physics 2023年第8期75卷 134-138页

作者： Hua-Yu Dai Jia-Rui sun yuan sun School of Physics and Astronomy Sun Yat-Sen UniversityGuangzhou 510275China

Tensor networks are used to describe the ground state wavefunction of the quantum many-body ***,it has been shown that a tensor network can generate the anti-de Sitter(AdS)geometry by using the entanglement renormalization approach,which provides a new way to realize bulk reconstruction in the AdS/conformal field theory ***,whether the dynamical connections can be found between the tensor network and gravity is an important unsolved *** this paper,we give a novel proposal to integrate ideas from tensor networks,entanglement entropy,canonical quantization of quantum gravity and the holographic principle and argue that the gravitational dynamics can be generated from a tensor network if the wave function of the latter satisfies the Wheeler–DeWitt equation.

关键词： AdS/CFT correspondence tensor network emergent gravity

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Fault estimation and fault-tolerant control for linear discrete time-varying stochastic systems

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Science China(Information Sciences) 2021年第10期64卷 5-20页

作者： Tianliang ZHANG Feiqi DENG yuan sun Peng SHI School of Automation Science and Engineering South China University of Technology School of Electrical and Electronic Engineering University of Adelaide

This paper presents a scheme for simultaneous fault estimation and fault-tolerant control of linear discrete time-varying stochastic systems. An observer is proposed to estimate the system state and the fault simultaneously. The estimation errors of both the system state and fault can achieve exponential stability in mean square sense even if the fault arbitrarily changes or is unbounded. The controllers of the drift term and diffusion term are designed separately, and then based on the estimated fault, the fault compensation is performed to realize fault tolerance. For the parameter design in the estimator and controllers, we provide two different algorithms via the cone complementarity linearization and the state transition matrix methods,respectively. As an extension, a class of quasi-linear systems is also discussed. A simulation example with two different fault types and an application in electromechanical servo systems are provided to illustrate the usefulness of the proposed scheme.

关键词： linear discrete stochastic systems fault estimation fault-tolerant control state transition matrix exponentialstability in mean square

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GPU-acceleration 3D rotated-staggered-grid solutions to microseismic anisotropic wave equation with moment tensor implementation

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International Journal of Mining Science and Technology 2023年第4期33卷 403-410页

作者： Jing Zheng Lingbin Meng yuan sun Suping Peng State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology-BeijingBeijing 100083China College of Geoscience and Surveying Engineering China University of Mining and Technology-BeijingBeijing 100083China

To improve the accuracy of microseismic inversion,seismic anisotropy and moment tensor source should be carefully considered in the forward modelling *** this study,3D microseismic anisotropy wave forward modelling with a moment tensor source was *** modelling was carried out based on a rotated-staggered-grid(RSG)*** contrast to staggered-grids,the RSG scheme defines the velocity components and densities at the same grid,as do the stress components and elastic ***,the elastic moduli do not need to be *** addition,the detailed formulation and implementation of moment-tensor source loaded on the RSG was presented by equating the source to the stress ***,the RSG-based 3D wave equation forward modelling was performed in parallel using compute unified device architecture(CUDA)programming on a graphics processing unit(GPU)to improve its *** simulations including homogeneous and anisotropic models were carried out using the method proposed in this paper,and compared with other methods to prove the reliability of this ***,the high efficiency of the proposed approach was *** results show that the computational efficiency of proposed method can be improved by about two orders of magnitude compared with traditional central processing unit(CPU)computing *** could not only help the analysis of microseismic full wavefield records,but also provide support for passive source inversion,including location and focal mechanism inversion,and velocities inversion.

关键词： Microseismic Forward modelling Seismic anisotropy Moment tensor

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Projection-based 3D bioprinting for hydrogel scaffold manufacturing

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Bio-Design and Manufacturing 2022年第3期5卷 633-639页

作者： yuan sun Kang Yu Qing Gao Yong He State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Engineering for Life Group(EFL) Suzhou 215101China Key Laboratory of Materials Processing and Mold Zhengzhou UniversityZhengzhou 450002China Cancer Center Zhejiang UniversityHangzhou 310058China

Projection-based 3D bioprinting(PBP):a powerful method to fabricate 3D cellular structures Three-dimensional(3D)bioprinting has played an important role in tissue engineering and regenerative medicine areas over the past decade[1].Different from traditional cell cultures in Petri dishes,3D bioprinting can build bionic structures with a better potential to become artificial organ substitutes[2–4].With the development of photocurable biomaterials,the projection-based 3D printing method has been successfully applied in biological research[5,6].

关键词： printing biomaterials projection

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