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SUSY Confinement

Communications in Theoretical Physics 2018年第8期69卷 175-178页

作者： shu-Min Zhao Xue-qian Li Department of Physics Hebei UniversityBaoding 071002China Department of Physics Nankai UniversityTianjin 300071China

In response to the present status that searching for SUSY particles has been unsuccessful, we propose a bold scenario that SUSY particles are confined inside hadrons with a required condition of PR = 1 in analog to the color confinement for quarks. The scenario seems to be able to reconcile the beautiful SUSY theory and non-observation at present experiments. On other aspects, some loopholes in the proposal emerge and require to be answered in the future research.

关键词： SUSY confinement

Experimental study on discharge coefficient of a gear-shaped weir

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Water Science and Engineering 2018年第3期11卷 258-264页

作者： Jing Zhang qian Chang Qing-hua Zhang shu-ning Li College of Water Conservancy and Civil Engineering Shandong Agricultural University River Management Bureau Huaihe River Commission of the Ministry of Water Resources

This study focused on hydraulic characteristics around a gear-shaped weir in a straight channel. Systematic experiments were carried out for weirs with two different gear heights and eight groups of geometrical parameters. The impacts of various geometrical parameters of gear-shaped weirs on the discharge capacity were investigated. The following conclusions are drawn from the experimental study:(1) The discharge coefficient(m_c) was influenced by the size of the gear: at a constant discharge, the weir with larger values of a/b(a is the width of the gear, and b is the width between the two neighboring gears) and a/c(c is the height of the gear) had a smaller value of m_c. The discharge capacity of the gear-shaped weir was influenced by the water depth in the weir.(2) For type C1 with a gear height of 0.01 m, when the discharge was less than 60m^3/h and H_1=P 1.0, m_c slowly decreased with the increases of the discharge and H_1=P for a=b 1.0 and a=c 1.0, and slowly increased with the discharge and H_1=P for a=b > 1.0 and a=c > 1.0.(3) A formula of m_cfor gear-shaped weirs was established based on the principle of weir flow, with consideration of the water depth in the weir, the weir height and width, and the height of the gear.

关键词： Experimental study Discharge coefficient Discharge capacity Gear-shaped weir Geometrical parameter

Uniform design ray in the assessment of combined toxicities of multi-component mixtures

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Science Bulletin 2016年第1期61卷 52-58页

作者： shu-Shen Liu qian-Fen Xiao Jin Zhang Mo Yu Key Laboratory of Yangtze River Water Environment Ministry of Education College of Environmental Science and Engineering Tongji University College of Environment and Energy Engineering Anhui Jianzhu University

Multi-component mixture(MCM) is a complicated chemical system that contains a great deal of mixture rays with various mixture ratios, and each ray includes many mixtures with different concentration ***, in combined toxicity field, almost all studies on MCM focus on the mixtures designed by the equivalenteffect concentration ratio(EECR) procedure. However, the EECR mixtures cannot represent the whole mixture system because the EECR mixtures are located on one mixture ray in concentration space formed by multiple components. In our view, some optimal experimental design such as the uniform design(UD) should be used to effectively select many representative mixture rays from the MCM system,instead of single EECR ray. The uniform design ray(UDray) integrating UD idea with fixed-ratio ray design can systematically and comprehensively measure the combined toxicity changes in the MCM system. This review introduces the operation method, construction of uniform table and corresponding usable table, and some cases of application of the UD-ray to help readers easily use UD-ray in their MCM toxicity assessment.

关键词： Chemical mixture Uniform design Ray design Mixture ratio. Concentration-responserelationship Toxicity interaction

Quantum support vector machine for multi classification

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Communications in Theoretical Physics 2024年第7期76卷 57-62页

作者： Li Xu Xiao-yu Zhang Ming Li shu-qian Shen College of Science China University of PetroleumQingdao 266580China

Classical machine learning algorithms seem to be totally incapable of processing tremendous data,while quantum machine learning algorithms could deal with big data unhurriedly and provide exponential acceleration over classical *** this paper,we propose two quantum support vector machine algorithms for multi *** is the quantum version of the directed acyclic graph support vector *** other one is to use the Grover search algorithm before measurement,which amplifies the amplitude of the phase storing of the classification *** k classification,the former provides quadratic reduction in computational complexity when *** latter accelerates the training speed significantly and more importantly,the classification result can be read out with a probability of at least 50%using only one *** conduct numerical simulations on two algorithms,and their classification success rates are 96%and 88.7%,respectively.

关键词： quantum support vector machine quantum feature mapping Grover search algorithm

Generation of Entanglement Between Two Noninteracting Qubits via Interaction with Nonclassical Radiation Field

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Communications in Theoretical Physics 2005年第2X期44卷 259-268页

作者： ZOU Jian CAI Jin-Fang SHAO Bin LI qian-shu Department of Physics Beijing Institute of Technology Beijing 100081 China Department of Chemistry Beijing Institute of Technology Beijing 100081 China

We study the interaction between a single-mode quantized field and a quantum system composed of two qubits. We suppose that two qubits initially be prepared in the mixed and separable state, and study how entanglement between two qubits arises in the course of evolution according to the Jaynes-Cummings type interaction with nonclassical radiation field. We also investigate the relation between entanglement and purity of qubit subsystem. We show that different photon statistics have different effects on the dynamical behavior of the qubit subsystem. When the qubits are initially prepared in the maximally mixed and separable state, for coherent state field we cannot find entanglement between two qubits; for squeezed state field entanglement between two qubits exists in several short period of time; for even and odd coherent state fields of large photon number, the dynamical behavior of the entanglement between two qubits shows collapse and revival phenomenon. For odd coherent state field of small photon number, the entanglement with both qubits initially prepared in maximally mixed state can be stronger than that with both qubits initially prepared in pure states. For fields of small photon number, the entanglement strongly depends on the states they are initially prepared in. For coherent state field, and odd and even coherent state fields of large photon number, the entanglement only depends on the purity of the initial state of qubit subsystem. We also show that during the evolution the unentangled state may be purer than the entangled state, and the maximum degree of entanglement may not occur at the time when the qubit subsystem is in the purist state.

关键词： entanglement mixed state purity nonclassical state field

Effects of total dose irradiation on the threshold voltage of H-gate SOI NMOS devices

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Nuclear Science and Techniques 2016年第5期27卷 193-199页

作者： qian-Qiong Wang Hong-Xia Liu shu-Peng Chen shu-Long Wang Chen-Xi Fei Dong-Dong Zhao Key Laboratory for Wide Band Gap Semiconductor Materials and Devices of Education School of MicroelectronicsXidian University Xi'an 710071 China

This work researched the impact of total dose irradiation on the threshold voltage of N-type metal oxide semiconductor field effect transistors(nMOSFETs) in silicon-on-insulator(SOI) *** the subthreshold separation technology,the factor causing the threshold voltage shift was divided into two parts:trapped oxide charges and interface states,the effects of which are presented under ***,by analyzing the data,the threshold voltage shows a negative shift at first and then turns to positive shift when irradiation dose is ***,the influence of the dose rate effects on threshold voltage is *** research results show that the threshold voltage shift is more significant in low dose rate conditions,even for a low dose of100 krad(Si).The degeneration value of threshold voltage is 23.4%and 58.0%for the front-gate and the back-gate at the low dose rate,respectively.

关键词：阈值电压漂移总剂量辐照 NMOS器件 SOI 金属氧化物半导体场效应晶体管 H型低剂量率分离技术

Estimating up-limits of eccentricities for the binary black holes in the LIGO-Virgo catalog GWTC-1

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Research in Astronomy and Astrophysics 2020年第11期20卷 283-292页

作者： qian-Yun Yun Wen-Biao Han Gang Wang shu-Cheng Yang Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

In the first Gravitational-Wave Transient Catalogue of LIGO and Virgo,all events are announced having zero *** the present paper,we investigate the performance of SEOBNRE,which is a spin-aligned eccentric waveform model in *** comparing with all the eccentric waveforms in SXS library,we find that the SEOBNRE coincides perfectly with numerical relativity *** the SEOBNRE,we re-estimate the eccentricities of all black hole merger *** find that most of these events allow a possibility for existence of initial eccentricities at 10 Hz band,but are totally circularized at the observed frequency(≥20 Hz).The upcoming update of LIGO and the next generation detector like Einstein Telescope will observe the gravitational waves starting at 10 Hz or even *** the eccentricity exists at the lower frequency,then it may significantly support the dynamical formation mechanism taking place in globular clusters.

关键词： gravitational waves stars black holes binaries general

The opportunistic relaying scheme design and symbol error rate analysis for PLC networks in smart homes

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Science China(Information Sciences) 2021年第8期64卷 250-252页

作者： Linlin SUN Jiahui YAN Yuwen qian Feng shu Xiangwei ZHOU The School of Electronic and Optical Engineering Nanjing University of Science and Technology The Division of Electrical and Computer Engineering Louisiana State University

Dear editor,Power line communication(PLC) is treated as a retrofit technology, transmitting messages via conductors without extra infrastructure, which reduces the cost of implementation and maintenance [1]. Therefore, PLC is extensively adopted in smart grid applications. However, PLC encounters a hostile communication environment caused by the fast signal attenuation and severe impulsive noise [2].

关键词： SER The opportunistic relaying scheme design and symbol error rate analysis for PLC networks in smart homes

A reliable opportunistic routing for smart grid with in-home power line communication networks

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Science China Earth Sciences 2016年第12期59卷 73-85页

作者： Yuwen qian Cheng ZHANG Zhengwen XU Feng shu Linbin DONG Jun LI School of Electronic and Optical Engineering Nanjing University of Science and Technology China Research Institute of Radiowave Propagation National Key Laboratory of Electromagnetic Environment

The topology of in-home power line communication(PLC) networks varies frequently, which makes traditional routing algorithms failure. To solve this problem, an end-to-end transmission time for remaining path(TTRP) metric-based opportunistic routing(TTRPOR) is proposed. Since a local broadcasting scheme is adopted, the algorithm can find the optimal path for forwarding packets in a dynamic PLC network. The closed-form of the outage probability for a PLC channel is derived to estimate the TTRP. It is proved that the average throughput can achieve maximum as the metric TTRP is utilized to sort candidate forwarding *** results show that the end-to-end throughput of networks with TTRPOR, outperforms that of the network adopting DSR and EXOR, especially for the case of varying-topology in-home PLC networks.

关键词： smart grid in-home network narrowband PLC opportunistic routing power line communication