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Electric field effect in ultrathin zigzag graphene nanoribbons

Chinese Physics B 2015年第7期24卷 356-359页

作者：张文星刘云霄田华许军伟冯琳 Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of EducationPhysics DepartmentTaiyuan University of Technology

The electric field effect in ultrathin zigzag graphene nanoribbons containing only three or four zigzag carbon chains is studied by first-principles calculations, and the change of conducting mechanism is observed with increasing in-plane electric field perpendicular to the ribbon. Wider zigzag graphene nanoribbons have been predicted to be spin-splitted for both valence band maximum（VBM） and conduction band minimum（CBM） with an applied electric field and become half-metal due to the vanishing band gap of one spin with increasing applied field. The change of VBM for the ultrathin zigzag graphene nanoribbons is similar to that for the wider ones when an electric field is applied. However, in the ultrathin zigzag graphene nanoribbons, there are two kinds of CBMs, one is spin-degenerate and the other is spin-splitted, and both are tunable by the electric field. Moreover, the two CBMs are spatially separated in momentum space. The conducting mechanism changes from spin-degenerate CBM to spin-splitted CBM with increasing applied electric field. Our results are confirmed by density functional calculations with both LDA and GGA functionals, in which the LDA always underestimates the band gap while the GGA normally produces a bigger band gap than the LDA.

关键词： electric field density functional theory zigzag nanoribbon

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Detection of DNA Bases Using Fe Atoms and Graphene

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Chinese Physics Letters 2016年第1期33卷 123-126页

作者：胡建芬冯琳张文星李勇卢亚鑫 Key Laboratory of Advanced Transducers and Intelligent Control System(Ministry of Education) Department of PhysicsTaiyuan University of Technology

The adsorption of DNA bases on a magnetic probe composed of Fe atoms and graphene is studied by using first- principles calculations. The stability of geometry, the electronic structure and magnetic property are investigated. The results indicate that four DNA bases, i.e., adenine, thymine, cytosine and guanine, can all be adsorbed on the probe solidly. However, the magnetic moments of the composite structure can be observed only when adenine adsorbs on the probe. In the cases of the adsorption of the other three bases, the magnetic moments of the composite structure are zero. Based on the significant change of magnetic moment of the composite structure, adenine can be distinguished conveniently from thymine, cytosine and guanine. This work may provide a new way to detect DNA bases.

关键词： of on as in Fe Detection of DNA Bases Using Fe Atoms and Graphene that DNA is

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Geneva Hosts "ICT In Motor Vehicles" Workshop

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IEEE VEHICULAR TECHNOLOGY MAGAZINE 2009年第1期4卷 15-17页

作者： Bodson, Dennis Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan

The 'Information and Communication Technologies (ICT) In Motor Vehicles' Workshop was held at the Geneva International Motor Show between 4-5 March, 2009. The theme of the workshop was 'The Fully Networked Car', which focused on the integration of ICT in motor vehicles. A large number of experts, including engineers, designers, planners, government officials, regulators, and standards experts attended the event. The presentations focused on the issues facing the ICT and the automotive industries. One of the major topics discussed by the participants at the event was concerned with ICT and the impact of climate change. Some of the other topics that were discussed at the event included standards and spectrum, car-to-X communications, nomadic devices, voice and audiovisual services, advanced driver assistance systems, and wireless technologies for car production lines.

关键词： Vehicles Telecommunication standards Testing IP networks Web and internet services Protocols Feedback Conferences Internet telephony Network servers

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Design and characteristic research of a novel electromechanical-hydraulic hybrid actuator with two transmission mechanisms

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Frontiers of Mechanical Engineering 2023年第2期18卷 189-204页

作者： Shufei QIAO Long QUAN Yunxiao HAO Lei GE Lianpeng XIA Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education Taiyuan University of TechnologyTaiyuan 030024China

Servo-hydraulic actuators(SHAs)are widely used in mechanical equipment to drive heavy-duty ***,their energy efficiency is low,and their motion characteristics are inevitably affected by uncertain *** actuators(EMAs)possess superior energy efficiency and motion ***,they cannot easily drive heavy-duty mechanisms because of weak bearing *** study proposes and designs a novel electromechanical-hydraulic hybrid actuator(EMHA)that integrates the advantages of EMA and *** mainly features two transmission *** piston of the hydraulic transmission mechanism and the ball screw pair of the electromechanical transmission mechanism are mechanically fixed together through screw bolts,realizing the integration of two types of transmission *** control scheme of the electromechanical transmission mechanism is used for motion control,and the hydraulic transmission mechanism is used for power ***,the mathematical model,structure,and parameter design of the new EMHA are ***,the EMHA prototype and test platform are *** test results prove that the EMHA has good working characteristics and high energy *** with the valve-controlled hydraulic cylinder system,EMHA exhibits a velocity tracking error and energy consumption reduced by 49.7% and 54%,respectively,under the same working conditions.

关键词： electromechanical-hydraulic hybrid actuator(EMHA) integration transmission mechanisms power assistance energy efficiency working characteristics

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CS/Gel/MWCNTs Conductive Scaffolds Assisted by Electrical Stimulus for Skin Tissue Engineering

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Biotechnology and Bioengineering 2025年 2025 May 15页

作者： Liu, Zixian Ma, Zijun Li, Nini Zhang, Jinyao Li, Meng Han, Lu Cheng, Rong Shen, Zhizhong Han, Dan Sang, Shengbo Shanxi Key Laboratory of Artificial Intelligence & Micro Nano Sensors College of Integrated Circuits Taiyuan University of Technology Shanxi Province Taiyuan China Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education Taiyuan University of Technology Shanxi Province Taiyuan China College of chemistry and chemical Engineering North University of china Shanxi Province Taiyuan China Shanxi Research Institute of 6D Artificial Intelligence Biomedical Science Shanxi Province Taiyuan China

Hydrogel scaffolds show high potential in tissue engineering due to excellent mechanical properties and biocompatibility. However, an inherent lack of conductivity limits its application in areas requiring electrical stimulation. To address this issue, chitosan (CS)/gelatin (Gel) scaffolds were prepared with various concentrations of multi-walled carbon nanotubes (MWCNTs). Results indicated that MWCNT incorporation significantly improved both the electrical conductivity and mechanical strength of the scaffolds, with the CS/Gel/0.3% MWCNTs scaffold demonstrating superior biocompatibility compared to other formulations. Additionally, fibroblasts seeded onto the scaffolds responded positively to electrical stimulation, showing increased proliferation and elevated expression of type I and type III collagen. These findings highlight the potential of CS/Gel/MWCNTs scaffolds to enhance wound healing in skin tissue engineering. © 2025 Wiley Periodicals LLC.

关键词： Fiber bonding

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Zero-Magnetic-Field Oscillation of Spin Transfer Nano-Oscillator with a Second-Order-Perpendicular-Anisotropy Free Layer

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Chinese Physics Letters 2016年第3期33卷 107-110页

作者：郭园园赵飞飞薛海斌刘喆颉 Key Laboratory of Advanced Transducers & Intelligent Control System(Ministry of Education) Taiyuan University of Technology College of Physics & Optoelectronics Taiyuan University of Technology

The zero-magnetic-field oscillation behavior of spin torque nano-oscillator （STNO） with a perpendicularly mag- netized free layer with second-order uniaxial anisotropy is studied theoretically based on the Landau-Lifshitz- Cilbert-Slonczewski equation. It is demonstrated numerically that the second-order uniaxial anisotropy plays a significant role in the occurrence of a zero-magnetic-field steady-state precession, which can be understood in terms of the energy balance between the energy accumulation due to the spin torque and the energy dissipation due to the Gilbert damping. In particular, a relatively large zero-magnetic-field-oscillation current region, in which the corresponding microwave frequency is increased while the threshold current still maintains an almost constant value, can be obtained by modulating the second-order uniaxial anisotropy of the free layer. These results suggest a tunable zero-magnetic-field STNO, and it may be a promising configuration for STNO＇s applications in future wireless communications.

关键词： of on in is it as Zero-Magnetic-Field Oscillation of Spin Transfer Nano-Oscillator with a Second-Order-Perpendicular-Anisotropy Free Layer with

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High-accuracy disposable micro-optical anti-counterfeiting labels based on single-molecule quantum coherence

arXiv

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arXiv 2025年

作者： Han, Shuangping Song, Kai Zan, Pengyu Yu, Changzhi Li, Ao Zhou, Haitao Qin, Chengbing Xiao, Liantuan College of Physics and Optoelectronics Engineering Taiyuan University of Technology Shanxi Taiyuan030024 China Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education Taiyuan University of Technology Taiyuan030024 China Department of Nuclear Medicine The First Hospital of Shanxi Medical University Collaborative Innovation Center of Molecular Imaging Precision Medical Shanxi Medical University Taiyuan030001 China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser Spectroscopy Shanxi University Shanxi Taiyuan030006 China

In this work we introduce an innovative approach to single-molecule quantum coherence (SMQC)-based disposable micro-optical anti-counterfeiting labels. This method facilitates the editing and reading of anti-counterfeiting with single molecules used as the anti-counterfeiting information labels. The label is meticulously crafted through inkjet printing technology, while its authentication is achieved via frequency domain imaging. Through a validation process including experimental demonstration, numerical simulation, and neural network analysis, we demonstrate the feasibility of this approach, further validate the integrity of the miniature anti-counterfeiting information storage, and verify the signal extraction accuracy with the recognition accuracy of the labels is consistently above 99.995%. The combination of SMQC-based disposable micro-optical anti-counterfeiting technology is expected to enable more precise preparation of single-molecule-array chips, thus providing a crucial foundation for the advancement of high-tech and smart manufacturing industries. Copyright © 2025, The Authors. All rights reserved.

关键词： Ink jet printing

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New Method to Improve Dynamic Stiffness of Electro-hydraulic Servo systems

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Chinese Journal of Mechanical Engineering 2013年第5期26卷 997-1005页

作者： BAI Yanhong QUAN Long Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education Taiyuan University of Technology School of Electronics Information Engineering Taiyuan University of Science and Technology

Most current researches working on improving stiffness focus on the application of control *** controller in closed-loop hydraulic control system takes effect only after the controlled position is deviated,so the control action is *** dynamic performance against force disturbance and dynamic load stiffness can’t be improved evidently by advanced control *** this paper,the elementary principle of maintaining piston position unchanged under sudden external force load change by charging additional oil is *** this basis,the conception of raising dynamic stiffness of electro hydraulic position servo system by flow feedforward compensation is put *** a scheme using double servo valves to realize flow feedforward compensation is presented,in which another fast response servo valve is added to the regular electro hydraulic servo system and specially utilized to compensate the compressed oil volume caused by load impact in *** two valves are arranged in parallel to control the cylinder ***,the model of flow compensation is derived,by which the product of the amplitude and width of the valve’s pulse command signal can be *** determination rules of the amplitude and width of pulse signal are concluded by analysis and *** the proposed scheme,simulations and experiments at different positions with different force changes are *** simulation and experimental results show that the system dynamic performance against load force impact is largely improved with decreased maximal dynamic position deviation and shortened settling *** is,system dynamic load stiffness is evidently *** paper proposes a new method which can effectively improve the dynamic stiffness of electro-hydraulic servo systems.

关键词： electro-hydraulic servo system flow feedforward compensation dynamic load stiffness double-valve actuation

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Excavator Energy-saving Efficiency Based on Diesel Engine Cylinder Deactivation Technology

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Chinese Journal of Mechanical Engineering 2012年第5期25卷 897-904页

作者： YANG Jing QUAN Long YANG Yang Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education Taiyuan University of Technology Taiyuan 030024 China The State Key Lab of Fluid Power Transmission and Control Zhejiang University Hangzhou 31002 7 China

The hydraulic excavator energy-saving research mainly embodies the following three measures： to improve the performance of diesel engine and hydraulic component, to improve the hydraulic system, and to improve the power matching of diesel-hydraulic system-actuator. Although the above measures have certain energy-saving effect, but because the hydraulic excavator load changes frequently and fluctuates dramatically, so the diesel engine often works in high-speed and light load condition, and the fuel consumption is higher. Therefore, in order to improve the economy of diesel engine in light load, and reduce the fuel consumption of hydraulic excavator, energy management concept is proposed based on diesel engine cylinder deactivation technology. By comparing the universal characteristic under diesel normal and deactivated cylinder condition, the mechanism that fuel consumption can be reduced significantly by adopting cylinder deactivation technology under part of loads condition can be clarified. The simulation models for hydraulic system and diesel engine are established by using AMESim software, and fuel combustion consumption by using cylinder-deactivation-technology is studied through digital simulation approach. In this way, the zone of cylinder deactivation is specified. The testing system for the excavator with this technology is set up based on simulated results, and the results show that the diesel engine can still work at high efficiency with part of loads after adopting this technology; fuel consumption is dropped down to 11% and 13% under economic and heavy-load mode respectively under the condition of driving requirements. The research provides references to the energy-saving study of the hydraulic excavators.

关键词： diesel engine cylinder deactivation hydraulic excavator energy-saving

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Fabrication of ordered micro- and nano-scale patterns based on optical discs and nanoimprint

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Optoelectronics Letters 2016年第4期12卷 241-244页

作者：郭慧晶张校亮李晓春 Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceColleges of Physics and Optoelectronics Taiyuan University of Technology

A simple method to fabricate one-dimensional(1-D) and two-dimensional(2-D) ordered micro- and nano-scale patterns is developed based on the original masters from optical discs, using nanoimprint technology and soft stamps. Polydimethylsiloxane(PDMS) was used to replicate the negative image of the 1-D grating pattern on the masters of CD-R, DVD-R and BD-R optical discs, respectively, and then the 1-D pattern on one of the PDMS stamps was transferred to a blank polycarbonate(PC) substrate by nanoimprint. The 2-D ordered patterns were fabricated by the second imprinting using another PDMS stamp. Different 2-D periodic patterns were obtained depending on the PDMS stamps and the angle between the two times of imprints. This method may provide a way for the fabrication of complex 2-D patterns using simple 1-D masters.

关键词： Compact disks Fabrication Microchannels Nanotechnology Optical data storage Optical disk storage Polydimethylsiloxane Silicones

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