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Cooperative maximum adhesion tracking control for multi-motor electric locomotives

Railway Sciences 2025年第1期4卷 22-36页

作者： Leiting Zhao Yongxiang Wang Kan Liu Liran Li jingyuan zhan Qingliang Liu AC Transmission Department China Academy of Railway Sciences Corporation LimitedBeijingChina School of Information Science and Technology Beijing University of TechnologyBeijingChina

Purpose–This study aims to propose a cooperative adhesion control method for trains with multiple motors electric *** method is intended to optimize the output torque of each motor,maximize the utilization of train adhesion within the total torque command,reduce the train skidding/sliding phenomenon and achieve optimal adhesion utilization for each axle,thus realizing the optimal allocation of the multi-motor electric ***/methodology/approach–In this study,a model predictive control(MPC)-based cooperative maximum adhesion tracking control method for multi-motor electric locomotives is ***,train traction system with multiple motors is constructed in accordance with Newton’s second *** equations include the train dynamics equations,the axle dynamics equations,and the wheel-rail adhesion coefficient ***,a new MPC-based multi-axle adhesion co-optimization method is put *** method calculates the optimal output torque through real-time iteration based on the known reference slip speed to achieve multi-axle co-optimization under different ***–This paper presents a MPC system designed for the cooperative control of multi-axle *** results indicate that the proposed control system is able to optimize the adhesion of multiple axles under numerous different conditions and achieve the optimal power distribution based on the reduction of train skidding/***/value–This study presents a novel cooperative adhesion tracking control *** is designed for multi-motor electric locomotives,which has rarely been studied *** simulations are carried out in different conditions,including variable surfaces and motor failing.

关键词： Cooperative control Adhesion control Model predictive control Slip prevent Paper type Research paper

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Controlled Probabilistic Teleportation of an Unknown Multi-Particle High-Dimensional Entangled State

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Communications in Theoretical Physics 2009年第6期51卷 1027-1032页

作者： SHI jin zhan You-Bang Department of Physics Huaiyin Teachers College Huaian 223300 China

We propose a protocol for controlled probabilistic teleportation of an unknown tripartite qutrit entangled state with two partial tripartite qutrit entangled states as the quantum channel. It is found that teleportation associated with the generalized qutrit Bell-basis measurement, the generalized qutrit π-state measurement and the generalized Hadamard operator in three-dimensional Hilbert space. We generalize the protocol for controlled probabilistic teleportation of an unknown k-particle qudit entangled state with a multi-particle qudit entangled state and a tripartite qudit entangled state as the quantum channel. We also calculate the classical communication cost required in both cases.

关键词： probabilistic teleportation generalized Bell-basis measurement Hadamard operator unitary transformation classical communication cost

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Nanowatt-level optoelectronic GaN-based heterostructure artificial synaptic device for associative learning and neuromorphic computing

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Journal of Semiconductors 2025年第2期46卷 114-120页

作者： Teng zhan Jianwen Sun jin Lin Banghong zhang Guanwan Liao Zewen Liu Junxi Wang jinmin Li Xiaoyan Yi Research and Development Center for Wide Bandgap Semiconductors Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Integrated Circuits Tsinghua UniversityBeijing 100084China Beijing Wanlongjingyi Technology Co. Ltd.Beijing 101318China

In recent years,research focusing on synaptic device based on phototransistors has provided a new method for asso-ciative learning and neuromorphic computing.A TiO_(2)/AlGaN/GaN heterostructure-based synaptic phototransistor is fabricated and measured,integrating a TiO_(2)nanolayer gate and a two-dimensional electron gas(2DEG)channel to mimic the synaptic weight and the synaptic cleft,*** maximum drain to source current is 10 nA,while the device is driven at a reverse bias not exceeding-2.5 V.A excitatory postsynaptic current(EPSC)of 200 nA can be triggered by a 365 nm UVA light spike with the duration of 1 s at light intensity of 1.35μW·cm^(-2).Multiple synaptic neuromorphic functions,including EPSC,short-term/long-term plasticity(STP/LTP)and paried-pulse facilitation(PPF),are effectively mimicked by our GaN-based het-erostructure synaptic *** the typical Pavlov’s dog experiment,we demonstrate that the device can achieve"retraining"process to extend memory time through enhancing the intensity of synaptic weight,which is similar to the working mecha-nism of human brain.

关键词： GaN heterostructure neuromorphic synaptic optoelectronic phototransisitor pavlov

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多材质叠层电极电火花加工微结构仿真与实验研究

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电加工与模具 2025年第1期 20-26页

作者：江凯梁俊威伍晓宇徐斌詹顺达深圳信息职业技术学院广东深圳518172 深圳大学广东省微纳光机电工程技术重点实验室广东深圳518060

基于不同材质电极在电火花加工过程中损耗速率的差异,提出了放电蚀除策略,构建了多材质叠层电极电火花加工微结构三维仿真模型,分析了工件表面微结构在加工过程中的形貌演变,为探究电极材质构成、梯度设计提供依据,指导工件表面微结构... 详细信息

基于不同材质电极在电火花加工过程中损耗速率的差异,提出了放电蚀除策略,构建了多材质叠层电极电火花加工微结构三维仿真模型,分析了工件表面微结构在加工过程中的形貌演变,为探究电极材质构成、梯度设计提供依据,指导工件表面微结构的成形加工。此外,进行了两种典型表面微结构(Cu、Sn叠层和CuSn叠层)的电火花加工实验,得出实际加工与仿真数据的相对误差分别为6.4%和4.8%,表明仿真模型具有较高的准确度和广泛的通用性。

关键词：电火花加工叠层电极仿真分析表面微结构

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荧光假单胞菌蛋白表达系统研究进展

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生物技术通报 2025年第1期41卷 49-61页

作者：谭景轩邢德勋何天锦刘占英内蒙古工业大学化工学院、内蒙古自治区发酵产业节能减排工程技术研究中心、生物发酵绿色制造内蒙古自治区工程研究中心、内蒙古自治区生物发酵专业化研发与中试平台呼和浩特010051

荧光假单胞菌(Pseudomonas fluorescens)作为一种新型蛋白表达系统,凭借其多样且独特的分泌系统,逐渐展现出在生物技术和生物制药领域的巨大应用潜力。尽管传统蛋白表达系统,如大肠杆菌、酿酒酵母及昆虫细胞系统,已在众多研究和工业应... 详细信息

荧光假单胞菌(Pseudomonas fluorescens)作为一种新型蛋白表达系统,凭借其多样且独特的分泌系统,逐渐展现出在生物技术和生物制药领域的巨大应用潜力。尽管传统蛋白表达系统,如大肠杆菌、酿酒酵母及昆虫细胞系统,已在众多研究和工业应用中取得成功,但仍存在折叠机制和翻译后修饰等方面的局限性。相较之下,荧光假单胞菌因其能够高效处理和分泌大分子蛋白质而迅速成为当前研究的热点。本文综述了荧光假单胞菌在蛋白表达系统方面的最新进展,涵盖了高效表达宿主菌株、克隆表达载体及调控元件、蛋白分泌系统等多个领域。详细分析了荧光假单胞菌在蛋白质折叠、分泌及糖基化修饰等关键步骤中的优异表现,并探讨了多种信号肽在优化蛋白分泌效率中的应用。这些研究成果不仅显著提升了目标蛋白的溶解度和表达水平,还为改善蛋白质生产工艺提供了新的思路。此外,荧光假单胞菌在疫苗、治疗性蛋白质和抗体生产中的应用也已显示出广阔的应用前景。尽管近年来的研究取得了显著进展,该系统在某些高分子蛋白表达方面仍面临挑战。未来的研究应集中于基因组编辑技术、蛋白质分泌调控机制的优化,以及工业生产中的工艺优化,以进一步提高荧光假单胞菌作为蛋白表达平台的灵活性和效率,为蛋白质工程和合成生物学提供强有力的工具。

关键词：荧光假单胞菌蛋白表达系统分泌系统

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Temporal distribution of piperocks in Cambrian and Ordovician: A coevolutionary process with changes of paleoenvironment

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Science China Earth Sciences 2012年第1期55卷 26-38页

作者： FANG liang LIU JianBo zhan RenBin School of Earth and Space Sciences Peking UniversityBeijing 100871China Key Laboratory of Orogenic Belts and Crustal Evolution(Peking University) Ministry of EducationBeijing 100871China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China

Piperock, a kind of characteristic ichnofabrics in Phanerozoic, was thought to decline gradually from Cambrian to Ordovician. A new compilation on the occurrences of the Cambrian and Ordovician piperocks of China and the world shows that piperocks generally flourished in Cambrian and declined in Ordovician, but a sharp decrease occurred during Middle and Late Cambrian. The case-study on the piperocks from the Lower-Middle Ordovician Hongshiya Formation at Dabaochang of Qiaojia, northern Yunnan Province, Southwest China indicates that the forming and preservation of piperocks were controlled by the depositional environment, the intensities of predation, competition, bioturbation, and the contents of nutrition and oxygen in watermass. A careful study on the development of the Cambrian and Ordovician piperocks suggests that the decrease of nearshore siliciclastic sediments and the low contents of oxygen and nutrition in the watermass may have contributed to the decline of piperocks in Middle and Late Cambrian.

关键词： Piperock Skolithos Cambrian Ordovician temporal distribution Qiaojia northeastern Yunnan

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OsNAC120 balances plant growth and drought tolerance by integrating GA and ABA signaling in rice

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Plant Communications 2024年第3期5卷 197-215页

作者： Zizhao Xie liang jin Ying Sun Chenghang zhan Siqi Tang Tian Qin Nian Liu Junli Huang Key Laboratory of Biorheological Science and Technology of Ministry of Education Bioengineering College of Chongqing UniversityChongqingChina

The crosstalk between gibberellin(GA)and abscisic acid(ABA)signaling is crucial for balancing plant growth and adaption to environmental ***,the molecular mechanism of their mutual antagonism still remains to be fully *** this study,we found that knockout of the rice NAC(NAM,ATAF1/2,CUC2)tran-scription factor gene OsNAC120 inhibits plant growth but enhances drought tolerance,whereas OsNAC120 overexpression produces the opposite *** GA can rescue the semi-dwarf phenotype of osnac120 mutants,and further study showed that OsNAC120 promotes GA biosynthesis by transcriptionally activating the GA biosynthetic genes OsGA20ox1 and *** DELLA protein SLENDER RICE1(SLR1)interacts with OsNAC120 and impedes its transactivation ability,and GA treatment can remove the inhi-bition of transactivation activity caused by *** the other hand,OsNAC120 negatively regulates rice drought tolerance by repressing ABA-induced stomatal *** investigation revealed that OsNAC120 inhibits ABA biosynthesis via transcriptional repression of the ABA biosynthetic genes OsNCED3 and *** OSMOTIC STRESS/ABA-ACTIVATED PROTEIN KINASE 9(OsSAPK9)physically interacts with OsNAC120 and mediates its phosphorylation,which results in OsNAC120 *** treatment ac-celerates OsNAC120 degradation and reduces its transactivation ***,our findings provide evidence that OsNAC120 plays critical roles in balancing GA-mediated growth and ABA-induced drought tolerance in *** research will help us to understand the mechanisms underlying the trade-off between plant growth and stress tolerance and to engineer stress-resistant,high-yielding crops.

关键词： abscisic acid ABA drought stress gibberellin GA OsNAC120 OsSAPK9 rice Oryza sativa L. SLR1

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变转速电机驱动变排量液压泵控制液压缸能耗特性研究

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机床与液压 2025年第1期53卷 180-186,222页

作者：魏列江路全锋展鹏梁明远何爱欢兰州理工大学能源与动力工程学院甘肃兰州730050 兰州理工大学特种泵阀及流控系统教育部重点实验室甘肃兰州730050

泵控液压缸系统因其不存在节流损失而被广泛应用,但仍存在动力源与负载功率匹配性差、电机与泵自身能耗损失大等问题。以变转速电机驱动变排量液压泵控制液压缸系统为研究对象,建立系统数学模型和电机-液压泵能量损失模型,完成泵控液压... 详细信息

泵控液压缸系统因其不存在节流损失而被广泛应用,但仍存在动力源与负载功率匹配性差、电机与泵自身能耗损失大等问题。以变转速电机驱动变排量液压泵控制液压缸系统为研究对象,建立系统数学模型和电机-液压泵能量损失模型,完成泵控液压缸系统参数匹配设计,计算推导不同负载工况下变转速电机驱动变排量液压泵能量转换效率与电机转速之间的关系,提出一种控制电机转速实现功率匹配,并调节液压泵排量以实现液压缸位置闭环控制的转速、排量复合控制策略。在AMESim中搭建变转速电机驱动变排量液压泵控制液压缸系统模型,在Simulink中搭建复合控制策略模型,并进行联合仿真。结果表明:相较于同参数配置的变转速定排量泵控系统,复合控制泵控系统的控制精度在允许范围内有所降低,但系统整体能源利用效率提升明显。在一个完整工作周期内,液压缸位置控制误差增加0.6%,系统能源利用效率平均提升约18.9%。

关键词：泵控液压缸转速、排量复合控制策略功率匹配效率

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Tailoring temperature response for a multimode fiber

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Opto-Electronic Science 2025年第1期4卷 12-24页

作者： Han Gao Haifeng Hu Qiwen zhan School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China Institute of Modern Optics Nankai UniversityTianjin 300350China zhangjiang Laboratory 100 Haike RoadShanghai 201204China Shanghai Key Lab of Modern Optical System University of Shanghai for Science and TechnologyShanghai 200093China.

This work introduces special states for light in multimode fibers featuring strongly enhanced or reduced correlations be-tween output fields in the presence of environmental temperature *** experimentally measured multi-tem-perature transmission matrix,a set of temperature principal modes that exhibit resilience to disturbances caused by tem-perature fluctuations can be *** this concept also allows the construction of temperature anti-principal modes,with output profiles more susceptible to temperature influences than the unmodulated *** changes in the length of the multimode fiber within the temperature-fluctuating region,the proposed approach remains capable of robustly controlling the temperature response within the *** illustrate the practicality of the proposed spe-cial state,a learning-empowered fiber specklegram temperature sensor based on temperature anti-principal mode sensi-tization is *** sensor exhibits outstanding superiority over traditional approaches in terms of resolution and *** novel states are anticipated to have wide-ranging applications in fiber communication,sensing,imaging,and spectroscopy,and serve as a source of inspiration for the discovery of other novel states.

关键词： multimode fiber principal mode wavefront shaping optical fiber sensor temperature response

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Catching cancer signals in the blood:Innovative pathways for early esophageal cancer diagnosis

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World Journal of Gastroenterology 2025年第10期31卷 1-6页

作者： Yue Zhao zhan zhang Jian-Hao Qiu Rong-Yang Li Zhen-Guo Sun Department of Thoracic Surgery Qilu Hospital of Shandong UniversityJinan 250063Shandong ProvinceChina Department of Thoracic Surgery The First Affiliated Hospital of Shandong First Medical UniversityShandong Provincial Qianfoshan HospitalJinan 250063Shandong ProvinceChina

In recent years,significant progress has been made in the application of DNA methylation for the early detection of esophageal cancer(EC).As an epigenetic modification,DNA methylation allows for noninvasive screening by detecting the methylation status of circulating tumor *** have shown that the methylation of genes such as SHOX2,SEPTIN9,EPO,and RNF180 significantly improves diagnostic sensitivity and ***,SEPTIN9 has been approved by the Food and Drug Administration for colorectal cancer screening,while SHOX2 and EPO show promising results in EC,and RNF180 has potential in gastrointestinal *** editorial reviews the study by Liu et al,which demonstrated the potential of combining the methylation of these four genes for early EC *** addition to their roles in early diagnosis,DNA methylation markers are gaining attention because of their roles in predicting recurrence and in postoperative *** monitoring changes in methylation levels,these markers can provide valuable insights into treatment efficacy and long-term *** research progresses,liquid biopsy technology is expected to become an essential tool in the precision diagnosis and treatment of EC,benefiting patients significantly.

关键词： Esophageal cancer DNA methylation Circulating tumor DNA Early detection Liquid biopsy Treatment monitoring

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