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Minimal setup for non-Abelian braiding of Majorana zero modes

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Science China(Physics,Mechanics & Astronomy) 2021年第11期64卷 127-132页

作者： Jie Liu Wenqin Chen Ming Gong yijia wu XinCheng Xie Ministry of Education Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiaotong UniversityXi’an 710049China International Center for Quantum Materials School of PhysicsPeking UniversityBeijing 100871China Beijing Academy of Quantum Information Sciences Beijing 100193China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China

Braiding Majorana zero modes(MZMs)is the key procedure toward topological quantum ***,the complexity of the braiding manipulation hinders its experimental *** we propose an experimental setup consisting of MZMs and a quantum dot state which can substantially simplify the braiding protocol of *** braiding scheme,corresponding to a specific closed loop in the parameter space,is quite universal and can be realized in various ***,the braiding results can be measured and manifested through electric current,providing a simple and novel way to detect the non-Abelian statistics of MZMs.

关键词： non-Abelian statistics geometric phase Majorana zero modes

Double-frequency Aharonov-Bohm effect and non-Abelian braiding properties of Jackiw-Rebbi zero-mode

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National Science Review 2020年第3期7卷 572-578页

作者： yijia wu Haiwen Liu Jie Liu Hua Jiang X.C.Xie International Center for Quantum Materials School of Physics Peking University Beijing Academy of Quantum Information Sciences Center for Advanced Quantum Studies Department of Physics Beijing Normal University School of Physical Science and Technology Soochow University Department of Applied Physics School of ScienceXi'an Jiaotong University CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences

Ever since its first proposal in 1976, Jackiw-Rebbi zero-mode has been drawing extensive attention for its charming properties including charge fractionalization, topologically protected zero-energy and possible non-Abelian statistics. We investigate these properties through the Jackiw-Rebbi zero-modes in quantum spin Hall insulators. Though charge fractionalization is not manifested, Jackiw-Rebbi zero-mode’s zero-energy nature leads to a double-frequency Aharonov-Bohm effect, implying that it can be viewed as a special case of Majorana zero-mode without particle-hole symmetry. Such relation is strengthened for Jackiw-Rebbi zero-modes also exhibiting non-Abelian properties in the absence of ***, in the condition that the degeneracy of Jackiw-Rebbi zero-modes is lifted, we demonstrate a novel non-Abelian braiding with continuously tunable fusion rule, which is a generalization of Majorana zero-modes’ braiding properties.

关键词： Jackiw-Rebbi zero-mode Aharanov-Bohm effect non-Abelian statistics Majorana zero-mode

Efficient removal of tetracycline by H_(2)O_(2) activated with iron-doped biochar: Performance, mechanism, and degradation pathways

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Chinese Chemical Letters 2022年第4期33卷 2105-2110页

作者： Xiang Li Yan Jia Jiajia Zhang Yang Qin yijia wu Minghua Zhou Jianhui Sun School of Environment Henan Normal UniversityKey Laboratory of Yellow River and Huai River Water Environment and Pollution ControlMinistry of EducationHenan Key Laboratory for Environmental Pollution ControlInternational Joint Laboratory on Key Techniques in Water TreatmentHenan ProvinceHenan Engineering Laboratory of Environmental Functional Materials and Pollution ControlXinxiang 453007China Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationTianjin Key Laboratory of Environmental Technology for Complex Trans-Media PollutionTianjin Advanced Water Treatment Technology International Joint Research CenterCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China

In this study,novel iron-doped biochar(Fe-BC) was produced using a simple method,and it was used as an H_(2)O_(2)activator for tetracycline(TC) ***,iron loading can improve the separation performance and reactivity of biochar(BC).In the Fe-BC/H_(2)O_(2)system,92% of the TC was removed within 30 min with the apparent rate constant(k_(obs)) of 0.155 min^(-1),which was 23.85 times that in the case of the BC/H_(2)O_(2)system(0.0065 min^(-1)).The effects of the H_(2)O_(2) and Fe-BC dosage,initial pH,and TC concentration on the TC removal were *** radical quenching and electron paramagnetic resonance(EPR) measurements demonstrated that the removal of TC using the Fe-BC/H_(2)O_(2)process involved both radical(^(*)OH and O_(2)^(-)) and non-radical pathways(^(1)O_(2) and electron transfer).In addition,the performance of the catalyst was also affected by the persistent free radicals(PFRs) and defective sites on the ***,the degradation pathways of TC were proposed according to the intermediate products detected by LC-MS and the ecotoxicity of intermediates was ***,the Fe-BC/H_(2)O_(2)showed high resistance to inorganic anions and natural organic matter in aquatic ***,Fe-BC is expected to be an economic and highly efficient heterogeneous Fenton catalyst for removing the organic contaminants in wastewater.

关键词： Fe-BC Fenton-like Tetracycline Removal mechanisms Degradation pathways

Application of Brain-Computer-Interface in Awareness Detection Using Machine Learning Methods

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China Communications 2022年第6期19卷 279-291页

作者： Kaiqiang Feng Weilong Lin Feng wu Chengxin Pang Liang Song yijia wu Rong Cao Huiliang Shang Xinhua Zeng Academy for Engineering and Technology Fudan UniversityShanghai 200433China School of Information Science and Technology Fudan UniversityShanghai 200433China Department of Cardiology Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai 200437China Electronics and Information Engineering Shanghai University of Electric PowerShanghai 200090China

The awareness detection in patients with disorders of consciousness currently relies on behavioral observations and CRS-R tests,however,the misdiagnosis rates have been relatively *** this study,we applied brain-computer interface(BCI)to awareness detection with a passive auditory stimulation paradigm.12 subjects with normal hearing were invited to collect electroencephalogram(EEG)based on a BCI communication system,in which EEG signals are transmitted *** necessary preprocessing,RBF-SVM and EEGNet were used for algorithm realization and *** a single subject,RBF-SVM can distinguish his(her)name stimuli awareness with classification accuracies ranging from 60-95%.EEGNet was used to learn all subjects'data and improved accuracy to 78.04%for characteristics finding and model ***,we completed the supplementary analysis work from the time domain and time-frequency *** study applied BCI communication to human awareness detection,proposed a passive auditory paradigm,and proved the effectiveness,which could be an inspiration for brain,mental or physical diseases diagnosis and detection.

关键词： brain-computer interface EEG awareness detection machine learning deep learning

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叠后地震资料井控高分辨率处理新方法

天然气工业 2019年第11期39卷 36-43页

作者：吴大奎吴宗蔚伍翊嘉中国石油川庆钻探工程有限公司地质勘探开发研究院

提高地震资料分辨率是地震勘探长期面对的重要课题。由于高频噪声的影响,传统方法都只能有限的提高分辨率。为此,在总结高分辨率研究现状的基础上,提出了一种井震联合叠加地震资料高分辨率处理方法,利用合成记录与地震记录有效信号相似... 详细信息

提高地震资料分辨率是地震勘探长期面对的重要课题。由于高频噪声的影响,传统方法都只能有限的提高分辨率。为此,在总结高分辨率研究现状的基础上,提出了一种井震联合叠加地震资料高分辨率处理方法,利用合成记录与地震记录有效信号相似、噪声不相似,有效信号有规律、噪声无规律,地震记录和合成记录邻频相似的“三性”特征,采用神经网络算法,建立了测井合成记录与地震记录关系;利用多层网络结构自适应地质地球物理的变化,提出了相应外推算法,采用该方法建立模型、开展理论模拟,并从频率成分和振幅能量恢复、相位校正、去规则和随机噪声等方面进行了试验。研究结果表明:①新方法能最大限度地提取到高频有效信息,同时去除噪声,不破坏中低频有效信息;②新方法突破了传统方法先去噪后拓频的思路,建立了拓频同时去噪的思路,并最大限度地提高了分辨率,大幅度突破了传统方法的限制;③新方法已经在各种储层描述中得到了应用,高分辨率处理成果在精度和准确性上都取得了显著的提升。

关键词：合成记录地震记录叠加高分辨率神经网络去噪拓频资料处理

四川盆地深层页岩沉积特征及储层主控因素——以威东地区龙马溪组为例

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天然气工业 2021年第5期41卷 55-65页

作者：伍翊嘉王滢黎菁中国石油集团川庆钻探工程有限公司地质勘探开发研究院

四川盆地3500 m以浅的中浅层海相页岩气已经成功实现商业化开发,中石油、中石化分别建成了威远—长宁、昭通国家级页岩气示范区和重庆涪陵国家级页岩气示范区,3个国家级页岩气示范区2020年的页岩气产量已经突破200×10^(8) m^(3)。四川... 详细信息

四川盆地3500 m以浅的中浅层海相页岩气已经成功实现商业化开发,中石油、中石化分别建成了威远—长宁、昭通国家级页岩气示范区和重庆涪陵国家级页岩气示范区,3个国家级页岩气示范区2020年的页岩气产量已经突破200×10^(8) m^(3)。四川盆地海相页岩气资源主要蕴藏在埋深大于3500 m的深层,深层海相页岩气能否取得规模效益开发是海相页岩气资源能否实现有序接替、有效动用的关键。为了明确四川盆地深层海相页岩气的勘探开发潜力,以该盆地中南部威东地区下志留统龙马溪组深层页岩气为例,基于对实钻井样品古氧相、有机碳含量、矿物组分等的系统分析,对深层页岩气沉积特征和储层主控因素进行了研究。研究结果表明:①最优沉积相带是富有机质泥棚和富有机质硅质泥棚,其中U/Th值多大于1.25,表现为强还原环境;②形成优质页岩气储层的沉积岩相带主要为中碳硅质页岩相或高碳硅质页岩相,有机碳含量多大于4%,孔隙度多大于5%,总含气量多大于5 m^(3)/t,脆性指数大于55%;③最优沉积相带和最优岩相带纵向上主要分布在研究区龙马溪组的底部,横向上由西北向东南逐渐增厚。结论认为,所建立的基于古氧相和岩相的威东地区龙马溪组深层页岩气沉积相划分标准,为该区深层页岩气下一步锁定规模建产区提供了技术支撑,同时也为类似地区深层页岩气的有利区优选提供了借鉴。

关键词：四川盆地威东地区深层页岩气龙马溪组古氧相岩相沉积特征储层主控因素

工农联盟的巩固与国家权力展演:《新湖南报》与“向占梅讨论”

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广东社会科学 2024年第1期 166-178,286页

作者：郦菁吴奕佳浙江大学社会学系杭州310058

国家建构的政治-文化面向并未在新中国政治史中充分讨论,特别是作为“全国性政治共同体”的工农联盟如何在话语层面建构和巩固。本文以1953—54年过渡时期总路线启动后统购统销政策推进的历史时刻为楔子,来拆解《新湖南报》如何通过“... 详细信息

国家建构的政治-文化面向并未在新中国政治史中充分讨论,特别是作为“全国性政治共同体”的工农联盟如何在话语层面建构和巩固。本文以1953—54年过渡时期总路线启动后统购统销政策推进的历史时刻为楔子,来拆解《新湖南报》如何通过“向占梅”讨论,运用特定策略,并在和公众的持续互动中生产了三个阶段的主要话语。这一讨论在某种程度上重塑了农民的理念,使得他们接纳了工农联盟的基本愿景,并卖粮给国家,因而代表了国家的展演性权力。这一话语过程也部分关照了农民的利益,且没有使用过多强制力,在建国初期行政力和资源尚不完善的情境下是一重大发展,也是20世纪全球政治建立工农联盟浪潮的一块重要拼图。

关键词：工农联盟全国性政治共同体政治-文化权力解读性机构展演性

亚临界流体与高剪切应力对EPDM废胶粉脱硫反应的影响

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高分子材料科学与工程 2015年第2期31卷 119-123,129页

作者：武懿嘉沈韦韦张云灿南京工业大学材料科学与工程学院江苏南京210009

在废旧三元乙丙橡胶粉(WEPDM)与未硫化三元乙丙橡胶(EPDM)混合物的熔融挤出过程中,采用改变亚临界流体品种和提高双螺杆挤出机螺杆转速的方法,研究了亚临界流体品种与高剪切应力对脱硫共混物DEPDM/EPDM的凝胶含量、门尼黏度、溶胶红外... 详细信息

在废旧三元乙丙橡胶粉(WEPDM)与未硫化三元乙丙橡胶(EPDM)混合物的熔融挤出过程中,采用改变亚临界流体品种和提高双螺杆挤出机螺杆转速的方法,研究了亚临界流体品种与高剪切应力对脱硫共混物DEPDM/EPDM的凝胶含量、门尼黏度、溶胶红外光谱及脱硫共混物共混三元乙丙橡胶与原EPDM共混再硫化材料EPDM/(DEPDM/EPDM)力学性能的影响,对再硫化材料的试样断面形貌也进行了扫描电镜观察。结果表明,亚临界流体水或醇的存在均能促进脱硫、解交联反应的进行,特别是在以亚临界乙醇水(7∶3)混合物作为反应介质的条件下,脱硫反应中交联S-S键断裂选择性明显增大,所得产物凝胶含量降低,门尼黏度增大,其再硫化材料力学性能也明显增加。挤出机的螺杆转速和脱硫反应温度均存在最佳值(220℃,600~800 r/min)。在以醇水混合物为反应介质的最佳条件下(220℃,600~800 r/min),其脱硫共混物共混EPDM再硫化材料EPDM/(DEPDM/EPDM)的拉伸强度和断裂生长率分别达到26.7 MPa和606.3%。

关键词：三元乙丙橡胶亚临界流体剪切应力脱硫反应

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油气勘探开发云虚拟机内存迁移算法改进研究

西南石油大学学报（自然科学版） 2020年第6期42卷 181-186页

作者：谯英吴易佳杨绪华西南石油大学计算机科学学院四川成都610500

虚拟机动态迁移对数字油田的云平台安全建设具有重要意义。文中讨论云计算关键技术虚拟化技术中--虚拟机动态迁移机制。针对预拷贝迁移方法停机过长这一问题,在预拷贝方法的基础上,提出基于标识的动态迁移方法,能够有效地减少迁移时间,... 详细信息

虚拟机动态迁移对数字油田的云平台安全建设具有重要意义。文中讨论云计算关键技术虚拟化技术中--虚拟机动态迁移机制。针对预拷贝迁移方法停机过长这一问题,在预拷贝方法的基础上,提出基于标识的动态迁移方法,能够有效地减少迁移时间,提高迁移效率。首先,新增一个计数器用于记录脏页数量,以此判断是否为频繁改动脏页;然后,设置一个window值,当频繁改动脏页的数量达到window值,将脏页全部发送至目标服务器。该方法避免了最后一次传送时页面过多而造成虚拟机停机时间过长的问题。实验结果表明,该方法在迁移时间和数据传输量上明显优于预拷贝方法,提高了虚拟机迁移效率。

关键词：数字油田虚拟机技术动态迁移预拷贝脏页