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Established conversions for hybrid entangled states assisted by error-predicted parity-discriminated devices

Chinese Physics B 2025年第1期34卷 72-78页

作者： Fang-Fang Du Zhi-Guo Fan Xue-Mei Ren Ming Ma Wen-Yao Liu Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China

Hybrid entangled states are crucial in quantum physics,offering significant benefits for hybrid quantum communication and quantum computation,and then the conversion of hybrid entangled states is equally *** paper presents two novel schemes,that is,one converts the two-qubit hybrid Knill–Laflamme–Milburn(KLM)entangled state into Bell states and the other one transforms the three-qubit hybrid KLM state into Greenberger–Horne–Zeilinger(GHZ)states assisted by error-predicted and parity-discriminated ***,the integration of single photon detectors into the parity-discriminated device enhances predictive capabilities,mitigates potential failures,and facilitates seamless interaction between the nitrogen-vacancy center and photons,so the two protocols operate in an error-predicted way,improving the experimental ***,our schemes demonstrate robust fidelities(close to 1)and efficiencies,indicating their feasibility with existing technology.

关键词： quantum information processing quantum entanglement quantum communication entanglement conversion

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An enhanced flexible triboelectric tactile sensor for material classification and roughness recognition

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science China(Technological sciences) 2025年第4期68卷 94-104页

作者： Jingchao YUAN Jian HE Junbin YU Shuai SHI Yanxiang CHANG Xiujian CHOU Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan030051China Shanxi Key Laboratory of Ferroelectric Physical Micro-nano Devices and Systems North University of ChinaTaiyuan030051China

Tactile sensors are one of the core components for intelligent robots to realize human-like tactile sensing *** the application scenarios of material classification and roughness recognition,an enhanced flexible triboelectric tactile sensor(FTTS)is proposed in this *** FTTS is prepared based on a single-electrode triboelectric nanogenerator(SETENG),which generates the corresponding electrical signals by coming in contact with *** enhance the properties of the SE-TENG,the synergistic enhancement effect on the electrical output of the SE-TENG was explored by controlling the addition ratio of MXene and Carboxylated cellulose nanofibers(CNF-C).The charge-trapping mechanism of the chargetrapping layer was analyzed,and the effects of the type and thickness of the charge-trapping layer on the performance of the FTTS were systematically *** and simple fabricated braided microstructures were prepared using the template method,which showed the optimum capability in terms of self-cleaning and electrical output *** these improvements,the FTTS showed a voltage sensitivity of 2.88 V/10^(4)Pa in the pressure response range of 10-400 kPa,a linearity of 0.993,and a linear trend in the fitting *** the same time,the FTTS has a stable response frequency,fast response time,and extreme cycling stability(over 10000 cycles).In addition,in terms of roughness recognition,the FTTS can accurately recognize samples with different surface *** terms of material classification,the accuracy of classifying 11materials with the visual geometry group(VGG)network reaches 96.08%.Based on these findings,FTTS-based tactile sensors offer diverse options in the future direction of electronic skin and tactile sensing.

关键词： single-electrode triboelectric nanogenerator tactile sensor self-cleaning VGG network material classification roughness recognition

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A Novel measurement Setup Enabling the Extraction of Nonlinear Wideband Scatter Parameters

A Novel Measurement Setup Enabling the Extraction of Nonline...

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2024 Conference on Radio Frequency measurement, CRFM 2024

作者： Li, Haode Liu, Zhenyu Fu, Tangyu Wu, Zhihao Yang, Baoguo Su, Jiangtao Innovation Center for Electronic Design Automation Hangzhou Dianzi University Hangzhou310018 China Science and Technology on Electronic Test & Measurement Laboratory Qingdao266000 China

This paper proposes a novel measurement architecture aimed at accurately characterizing the inherent nonlinear characteristics of RF power devices and extracting nonlinear wideband scatter parameters. By introducing two-tone frequency impedance synthesis and wide-band phase reference, nonlinear wide-band scatter parameters can be extracted from the measurement data. This approach is verified on a known parameter PA to assess the effectiveness of the measurement architecture. Experimental verification has shown that this model has a high degree of fit with actual measured data, significantly supporting the performance optimization of RF devices. This study provides an important tool for RF front-end design and device measurement. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Nonlinear Behavior RF measurement Two-Tone W-Parameters

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Impact attenuation mechanism of single/double-layer potting structures of MEMS devices under continuous double-pulse impact

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Defence technology 2025年

作者： Guo, Hao'nan Shi, Yunbo Zhao, Rui Chen, Yu'nan Zhang, Peng Chen, Liang Guo, Tao Science and Technology on Electronic Test & Measurement Laboratory North University of China Taiyuan030051 China

High-overload shocks are very likely to cause damage to the microstructure of MEMS devices, especially the continuous multiple high-overload shocks generated by the penetration of the multilayer target environment pose more stringent challenges to its protective structure. In this study, the kinetic response model of the protective structure under single-pulse and continuous double-pulse impact is established, and a continuous double-pulse high overload impact test impact platform based on the sleeve-type bullet is constructed, and the protective performance of the multi-layer structure under multi-pulse is analyzed based on the acceleration decay ratio, and the results show that the protective performance of the structure has a positive correlation with its thickness, and it is not sensitive to the change of the load of the first impact;the first impact under double-pulse impact will cause damage to the microstructure through the superposition of the second impact. The first impact under double-pulse impact will cause an increase in the overload amplitude of the second impact through superposition;compared with the single-layer structure, the acceleration attenuation ratio of the double-layer structure can be increased by up to 26.13%, among which the epoxy-polyurethane combination has the best protection performance, with an acceleration attenuation ratio of up to 44.68%. This work provides a robust theoretical foundation and experimental basis for the reliable operation of MEMS devices, as well as for the design of protective structures in extreme environments. © 2025 China Ordnance Society

关键词： MEMS

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Lensless imaging through the Fourier-ADMM network with a cost-effective and easily fabricated phase mask

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Optics Letters 2025年第3期50卷 758-761页

作者： Xiong, Zhencong He, Wenjun Chen, Yijie Xu, Yifei Wang, Wenbo Fu, Yuegang School of Opto-Electronic Engineering Changchun University of Science and Technology Changchun130022 China Changchun University of Science and Technology Key Laboratory of Opto-Electric Measurement and Optical Information Transmission Technology Ministry of Education Changchun130012 China

In this Letter, we introduce the Fourier-ADMM (alternating direction method of multipliers) network, improving the Fourier-ADMM algorithm by integrating it with an additional backpropagation process. Simultaneously, we develop a cost-effective and easily fabricated phase mask for lensless imaging systems. While the simplified phase mask may challenge the image quality for its faults such as low contrast and a suboptimal signal-to-noise ratio, the capabilities of the Fourier-ADMM network effectively mitigate these issues. The fabrication of the phase mask requires inexpensive and readily available raw materials and tools, and the process itself does not necessitate any highly specialized or precision operations. Our experimental results demonstrate that, with the backing of this advanced decoding network, the camera equipped with the simplified phase mask is capable of delivering high-quality imaging and rapid response times. © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Masks

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Nondestructive measurement of the thickness and refractive index of polymer thin films using a single-frequency terahertz Mueller matrix ellipsometry

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Optics Express 2025年第9期33卷 19605-19615页

作者： Yang, Haoming Liu, Defeng Huang, Qian Ming, Ziwei Yang, Zhengang Wang, Kejia Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Optics Valley Laboratory Huazhong University of Science and Technology Wuhan430074 China AVIC Beijing Changcheng Aeronautical Measurement and Control Technology Research Institute Beijing101111 China

Terahertz Mueller matrix ellipsometry is a nondestructive technique based on terahertz waves that can measure film thickness and optical constants with high accuracy. We propose a single-frequency terahertz Mueller matrix ellipsometry based on a dual rotating compensator configuration, which utilizes terahertz waves to achieve high-precision nondestructive measurements of the thickness and refractive index of polymer films. The system realizes the fully polarized incidence of the terahertz beam by rotating the compensator, and establishes a complete polarization measurement scheme by measuring the outgoing light intensity of the two compensators at different angles. Based on the coherent light scattering model, we developed a corresponding data processing algorithm and realized the simultaneous and accurate determination of the film thickness and refractive index through the extraction and inverse calculation of the full Mueller matrix elements. The experimental results show that the system has excellent measurement accuracy and reliability. This research opens up what we believe to be a new research pathway for the characterization and detection of thin film materials, which has an important application value in the field of material science and industrial testing. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Materials testing

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Enhanced energy-storage performance in Mn-doped (Pb0.97La0.02)ZrO3 films within a wide temperature range

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Ceramics International 2025年第12期51卷 16214-16223页

作者： Qiao, Xiaojun Wu, Yuxuan Geng, Wenping Chou, Xiujian Science and Technology on Electronic Test and Measurement Laboratory North University of China Taiyuan030051 China Shanxi Key Laboratory of Ferroelectric Physical Micro-nano Devices and Systems North University of China Taiyuan030051 China State Key Laboratory of Widegap Semiconductor Optoelectronic Materials and Technologies North University of China Shanxi Taiyuan030051 China Guangdong Institute of Semiconductor Micro-Nano Manufacturing Technology Guangdong Foshan China

Energy storage units combined with recoverable energy density under wide temperature range are promising candidate regarding to the modern pulse power system. Herein, Mn-doped PbLaZrO3 antiferroelectric films were prepared using the sol-gel method and the doping effect on the energy storage performance was explored in detail. The improvement in energy storage was owing to the change in the phase transition behavior from antiferroelectric‐to‐ferroelectric by Mn doping. A enhanced recoverable energy-storage density was obtained in 1 % Mn-doped films, which is relatively stable within wide temperature range. All the results indicate that Mn-doping is a effective way to optimize the electrical property of antiferroelectric films, which expanding the current strategy of antiferroelectric researches in the high-power energy storage application. © 2025

关键词： Sol-gel process

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A High-temperature Strain Dual Reference Sensor with a Self-compensating Structure

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IEEE Sensors Journal 2025年

作者： Huang, Junyi Wang, Yu Dong, Helei Tan, Qiulin North University of China Science and Technology on Electronic Test and Measurement Laboratory Taiyuan030051 China North University of China State Key Laboratory of Dynamic Measurement Technology Taiyuan030051 China

To address the challenges of high-temperature strain detection in aero-engines and similar equipment, this study employs screen printing technology to fabricate a self-compensating, temperature-integrated strain sensor capable of operating in extreme thermal environments. The sensor utilizes indium tin oxide (ITO) and platinum as sensitive materials and designs a strain gauge structure with a compensation function. This design enhances the flexibility in selecting compensation materials without compromising strain sensing performance. The sensor's performance was evaluated using a high-temperature muffle furnace and a strain testing system. Results demonstrate its excellent temperature and strain measurement capabilities. At 1250°C, the sensor exhibits an average temperature coefficient of resistance of -388.74 ppm/°C and a resistance drift rate of only 2.64 × 10-5/h over an 8-hour period, indicating its robust stability at high temperatures. Moreover, the sensor shows high sensitivity, accuracy, and excellent linearity with an average gauge factor of -17.8 in a strain characteristic test at 800°C. In the high-temperature measurement experiments, the thermocouple test results were analyzed using a high order polynomial fit, resulting in an average Seebeck coefficient of 47.9 μv/°C for the sensor. The sensor's fabrication process is straightforward and efficient, coupled with its self-compensation characteristics, making it a promising candidate for high-temperature strain sensing applications. © 2001-2012 IEEE.

关键词： Thermocouples

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Nonlinear correction of terahertz FMCW based on time-domain phase compensation

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Optics Letters 2025年第8期50卷 2630-2633页

作者： Liang, Bin Shen, Sishi Wang, Tianyi Wang, Yue Hao, Congjing Liu, Defeng Liu, Jinsong Wang, Kejia Yang, Zhengang Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Optics Valley Laboratory Huazhong University of Science and Technology Wuhan430074 China Huazhong Institute of Electro-Optics Wuhan430299 China AVIC Beijing Changcheng Aeronautical Measurement and Control Technology Research Institute Beijing101111 China

Terahertz frequency-modulated continuous-wave (THz FMCW) technology has become a widely used nondestructive testing tool due to its imaging and detection advantages. Nonlinearity is one of the most common problems with FMCW technology. This is due to the inability to maintain strict linearity during the high-frequency sweep process, resulting in multiple frequencies in the calculated intermediate frequency (IF) signal. This reduces the detection capability of the system, as the effective frequencies are swamped. This paper proposes a nonlinear correction method based on the time-domain phase compensation technique. The causes of nonlinear distortion are analyzed, and the corrected signal is obtained after phase compensation of the instantaneous time-domain signal. Experimental results obtained froman actual terahertz imaging system proved the effectiveness of the proposed method, achieving precise positioning of three-dimensional objects. The range resolution was improved by an order of magnitude, reaching the theoretical resolution of the experimental system. The method improves the detection accuracy of the system without the need for additional equipment. © 2025 Optica Publishing Group.

关键词： Terahertz waves

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A Self-test Method for MEMS Gyroscope With Equivalent Inertial Force

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IEEE Transactions on Instrumentation and measurement 2025年 74卷

作者： Zhou, Rui Cui, Rang Shen, Chong Shi, Yunbo Yu, Jingfeng Ren, Yanchao Cao, Huiliang North University of China Science and Technology on Electronic Test and Measurement Laboratory School of Instrument and Electronics Taiyuan030051 China Quanzhou Yunjian Measurement Control and Perception Technology Innovation Research Institute Quanzhou362000 China

This article introduces a self-test approach for micro-electromechanical system (MEMS) vibrating gyroscopes based on the concept of equivalent inertial force. By applying electrostatic signals to the feedback electrode, it is possible to simulate the inertial force input, enabling measurement of the gyroscope scale factor (SF) without reliance on physical testing equipment. This article presents the operational principle of equivalent inertial force, establishes the correlation between equivalent inertial force and angular velocity through derivation, and accomplishes the calibration of this relationship across a broad temperature range using quadrature feedback forces. In contrast to traditional methods, this approach facilitates direct measurement of the SF of the gyroscope and compensates for variations in the SF induced by alterations in the temperature and environmental conditions. The efficacy of the proposed approach was validated in a comparative experiment on a ring resonator gyroscope. In the open-loop mode, the average calibration error of the SF of the equivalent inertial force method and the turntable method is 5.608%. The long-term self-test repeatability is 1781.2 ppm. Furthermore, the SF self-compensation of the gyroscope within the temperature range of - 20°C to + 40°C was achieved using the self-test results. The temperature sensitivity of the SF before and after compensation changed from 6689.7 ppm/°C to 318.6 ppm/°C, which was reduced by 20×. © 1963-2012 IEEE.

关键词： Gyroscopes

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