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Calibration-free estimation algorithm for cuffless continuous blood pressure measurement based on ultrasonic devices

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national science Open 2025年第2期4卷 45-59页

作者： Jiarui Tang Haotian Lei Tianyu Kang Zihao Wang Yang Yu Ye Tian Yixuan Wang Hanchuan Tang Nianguo Dong Jianfeng Zang School of Integrated Circuits and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Thoracic and Cardiovascular Surgery Union Medical College HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430074China The State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

The rising global impact of hypertension calls for innovative approaches to achieve accurate and continuous blood pressure *** cuff-based methods and pulse-transit-time(PTT)measurements face challenges,including discontinuity and the need for frequent ***,we introduce a paradigm-shifting method using a flexible ultrasonic array for calibration-free *** conformal ultrasonic device,which integrates piezoelectric composites,copper electrodes,and a stretchable Polydimethylsiloxane substrate,precisely measures the radial artery diameter with an error margin controlled within 3%.The calibration-free algorithm,based on the Powalowski and Pensko model,establishes a dynamic correlation between arterial blood pressure and vessel diameter,with estimation errors within 1.2±1.0 ***-term monitoring over 30-day showcased the model’s *** approach eliminates the need for frequent calibration,enhances accuracy,and offers a comprehensive insight into the dynamic relationship between blood pressure and vessel *** innovation holds promise for revolutionizing continuous blood pressure monitoring,contributing to early detection and intervention in hypertensive individuals.

关键词： blood pressure measurement calibration-free wearable ultrasonic devices flexible electronics

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Real-time monitoring and analysis of hydraulic fracturing in surface well using microseismic technology:Case insights and methodological advances

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International Journal of Mining science and technology 2025年第4期35卷 619-638页

作者： Yanan Qian Ting Liu Cheng Zhai Hongda Wen Yuebing Zhang Menghao Zheng Hexiang Xu Dongyong Xing Xinke Gan State Key Laboratory of Coal Mine Disaster Prevention and Control China University of Mining and TechnologyXuzhou 221116China Yunlong Lake Laboratory of Deep Underground Science and Engineering Xuzhou 221003China Key Laboratory of Theory and Technology on Coal and Rock Dynamic Disaster Prevention and Control National Mine Safety AdministrationChina University of Mining and TechnologyXuzhou 221116China School of Safety Engineering China University of Mining and TechnologyXuzhou 221116China School of Emergency Management Chengdu UniversityChengdu 610106China School of Safety Science and Engineering Anhui University of Science and TechnologyHuainan 232001China Xinjiang Yaxin Coalbed Methane 156 Exploration Co. Ltd.Urumqi 841100China

Through a case analysis,this study examines the spatiotemporal evolution of microseismic(MS)events,energy characteristics,volumetric features,and fracture network development in surface well hydraulic fracturing.A total of 349 MS events were analyzed across different fracturing sections,revealing significant heterogeneity in fracture *** scanning results showed that cumulative energy values ranged from 240 to 1060 J across the sections,indicating notable *** reservoir volume(SRV)analysis demonstrated well-developed fracture networks in certain sections,with a total SRV exceeding 1540000 m^(3).The hydraulic fracture network analysis revealed that during the midfracturing stage,the density and spatial extent of MS events significantly increased,indicating rapid fracture propagation and the formation of complex *** the later stage,the number of secondary fractures near fracture edges decreased,and the fracture network *** comparing the branching index,fracture length,width,height,and SRV values across different fracturing sections,Sections No.1 and No.8 showed the best performance,with high MS event densities,extensive fracture networks,and significant energy ***,Sections No.4 and No.5 exhibited sparse MS activity and poor fracture connectivity,indicating suboptimal stimulation effectiveness.

关键词： Hydraulic fracturing Microseismic Source location Energy scanning Fracture network

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Giant Nonlinear Optical Response in Topological Semimetal Molybdenum Phosphide

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Chinese Physics Letters 2023年第11期40卷 53-56页

作者：胡凯秦羽婕程亮石友国齐静波 State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Nonlinear optical properties are investigated using the static and time-resolved second harmonic generation in the topological material molybdenum phosphide(Mo P) with three-component *** second harmonic generation signals are detected and the derived χ^((2)) value is larger than that of the typical electro–optic *** optical excitation,no photoinduced change of the symmetry is detected in MoP,which is quite different from previous observations in several other topological materials.

关键词： materials material Nonlinear

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A Novel Principal Component Analysis Algorithm for Fault Detection 43

A Novel Principal Component Analysis Algorithm for Fault Det...

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43rd Chinese control Conference, CCC 2024

作者： Shenhang, Wang Kun, Tian Wei, Zheng Mengyu, Liu Beijing Aerospace Automatic Control Institute Beijing100854 China National Key Laboratory of Science and Technology on Aerospace Intelligent Control Beijing100854 China

ISBN: (纸本)9789887581581

In modern industry, fault detection is very important in high-cost and safety-critical processes. Principal component analysis (PCA) is an effective data-driven approach which is widely used in this field. Conventional PCA is time-invariant, which often lead to false alarms. In order to overcome the false alarms, recursive PCA algorithms have been proposed for adaptive process. However, the amount of calculation of the algorithm is very great because of frequently updated information. In this paper, a novel recursive PCA method is proposed for solving the question by introducing the standard residual method. The standard residual method serves as an indicator of the level of consistency among data, which is used to decide whether or not to update the PCA model. The proposed method is applied to fault detection and experiment results demonstrate the effectiveness of the method. © 2024 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Errors

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Modeling and Experimental Study of an Open Two-Phase Loop Driven by Osmotic Pressure and Capillary Force

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Frontiers in Heat and Mass Transfer 2025年第1期23卷 55-70页

作者： Hanli Bi Zheng Peng Chenpeng Liu Zhichao Jia Guoguang Li Yuandong Guo Hongxing Zhang Jianyin Miao National Key Laboratory of SpacecraftThermal Control Beijing Institute of Spacecraft System EngineeringChina Academy of Space TechnologyBeijing100094China School of Aeronautical Science and Engineering Beihang UniversityBeijing100083China School of Energy and Environment Engineering University of Science and Technology BeijingBeijing100083China

As space technology advances,thermal control systems must effectively collect and dissipate heat from distributed,multi-source *** heat pipe is a highly reliable two-phase heat transfer component,but it has several limitations when addressing multi-source heat *** by the transport and heat dissipation system of plants,large trees achieve stable and efficient liquid supply under the influence of two driving forces:capillary force during transpiration in the leaves(pull)and root pressure generated by osmotic pressure in the roots(push).The root pressure provides an effective liquid supply with a driving force exceeding 2 MPa,far greater than the driving force in conventional capillary-pumped two-phase *** has shown that osmotic heat pipes offer a powerful driving force,and combining osmotic pressure with capillary force has significant ***,this paper designs a multi-evaporator,dual-drive two-phase loop,using both osmotic pressure and capillary force to solve the multi-source heat dissipation ***,a transmembrane water flux model for the osmotic pressure-driven device was established to predict the maximum heat transfer capacity of the dual-drive two-phase ***,an experimental setup for a multi-evaporator“osmotic pressure+capillary force”dual-drive two-phase loop was constructed,capable of transferring at least 235 W of power under a reverse gravity condition of 20 *** study also analyzed the effects of reverse gravity height,heat load distribution among the three evaporators,startup sequence,and varying branch resistances on the performance of the dual-drive two-phase loop.

关键词： Multi-heat sources osmotic pressure two-phase loop dual-drive loop heat pipe

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Multi-aircraft Path Planning Method for Cooperative Mission 1

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7th Chinese Conference on Swarm Intelligence and Cooperative control, CCSICC 2023

作者： He, Jingwen Zhang, Miaomiao Ju, Wen Liu, Yuecheng Liu, Yemo Yun, Hongquan Beijing Aerospace Automatic Control Institute Beijing100854 China National Key Laboratory of Science and Technology on Aerospace Intelligence Control Beijing100854 China

ISBN: (数字)9789819733361

ISBN: (纸本)9789819733354

Multi-aircraft swarm and autonomous collaboration are inevitable trends in future development, and this paper mainly studies the multi-aircraft cooperative trajectory planning problem model and collaborative search algorithm. Based on the traditional single path planning method, a collaborative trajectory planning strategy is proposed. Based on the spatiotemporal requirements of collaborative tasks, a constraint model is established, and a cooperative path cost model is established by comprehensively considering path synergy and flyability, so as to complete the modeling of path planning problems for collaborative tasks. Aiming at the initial divergence problem in traditional collaborative path planning, a collaborative range model that is updated synchronously with node search is proposed, and an improved cooperative A* path planning algorithm is proposed, which realizes path planning for multi-aircraft collaborative missions. Based on the typical mission environment, the proposed method is simulated, and the feasibility and correctness of the proposed algorithm for solving the multi-aircraft cooperative trajectory planning problem under complex space-time constraints are verified. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Motion planning

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Achieving robust nitritation in a modified continuous-flow reactor: From micro-granule cultivation to nitrite-oxidizing bacteria elimination

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Journal of Environmental sciences 2023年第2期124卷 117-129页

作者： Wenru Liu Jiajun Song Jianfang Wang Xiaoming Ji Yaoliang Shen Dianhai Yang National&Local Joint Engineering Laboratory for Municipal Sewage Resource Utilization Technology Suzhou University of Science and TechnologySuzhou 215009China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China College of Resources and Environmental Sciences Nanjing Agricultural UniversityNanjing 210095China State Key Laboratory of Pollution Control and Resources Reuse Tongji UniversityShanghai 200092China

In this study,a modified continuous-flow nitrifying reactor was successfully operated for rapid cultivation of micro-granules and achieving robust *** showed that sludge granulation with mean size of ca.100μm was achieved within three weeks by gradually increasing settling velocity-based selection pressure from 0.48 to 0.9 m/*** Nitrospira like nitrite-oxidizing bacteria(NOB)were enriched in the micro-granules with a ratio between ammonia-oxidizing bacteria(AOB)and NOB of 5.7%/6.5% on day 21,fast nitritation was achieved within one-week by gradually increasing of influent ammonium concentration(from 50 to 200 mg/L).Maintaining ammonium in-excess was the key for repressing NOB in the ***,when the influent ammonium concentration switched back to 50 mg/L still with the residual ammonium of 15–25 mg/L,the nitrite accumulation efficiency increased from 90%to 98%.Experimental results suggested that the NOB repression was intensified by both oxygen and nitrite unavailability in the inner layers of ***,continuous operation with ammonium in excess resulted in overproduction of extracellular polysaccharides and overgrowth of some bacteria(e.g.,Nitrosomonas,Arenimonas,and Flavobacterium),which deteriorated the micro-granule stability and drove the micro-granules aggregation into larger ones with irregular ***,efficient nitritation was stably maintained with extremely high ammonium oxidation potential(>50 mg/g VSS/hr)and nearly complete washout of NOB was *** suggested that smooth and spherical granule was not a prerequisite for achieving NOB wash-out and maintaining effective nitritation in the granular ***,the microgranules exhibited a great practical potential for high-rate nitritation.

关键词： Continuous flow Granulation Nitritation Nitrate-oxidizing bacteria repression

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Network-Based Fast Analysis Method for Aircraft Reachable Area 1

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7th Chinese Conference on Swarm Intelligence and Cooperative control, CCSICC 2023

作者： Zhang, MiaoMiao He, JingWen Ju, Wen Tian, ZhenPo Liu, YeMo National Key Laboratory of Science and Technology on Aerospace Intelligence Control Beijing100854 China Beijing Aerospace Automatic Control Institute Beijing100854 China

ISBN: (数字)9789819733408

ISBN: (纸本)9789819733392

In order to solve the issue of rapid collaborative mission planning for aircraft, a basic process for using neural networks to train intelligent prediction models to solve the reachable range is proposed. First, the idea of dichotomy is used to carry out traversal simulation experiments and the sample databases under various states is generated. Then, the neural network method is used to construct a trajectory reachable area prediction model, train and test the reachable area prediction model. Finally, the simulation analysis is carried out, and the simulation results showed that the method adopted in this paper is reasonable and feasible. The reachable area of the aircraft track is a polygonal area with upper and lower basic symmetry and left and right asymmetry. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Forecasting

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General Tactical Maneuvering Flight Decision and control

General Tactical Maneuvering Flight Decision and Control

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International Conference on Guidance, Navigation and control, ICGNC 2022

作者： Zhang, Ning Wang, Xiaomin Li, Jia National Key Laboratory of Science and Technology on Integrated Technology Control Xi’an710065 China Flight Automatic Control Research Institute AVIC Xi’an710065 China AECC Xi’an Engine Control Technology Co. LTD. Xi’an710065 China

ISBN: (纸本)9789811966125

Aiming at the problem that the control station cannot accurately intervene in real time and when encountering unforeseen threats such as air-to-air/surface-to-air missile attacks in air combat missions, research general tactical maneuver decision and autonomous maneuver control technology, and plan the optimal maneuver combination and maneuver timing to improve the success rate of autonomous missile defense. Establish generalized maneuvering trajectory planning and tracking control capabilities centered on maneuvering decision, solve the problem of quick victory in dynamic tasks, and improve the stealth maneuvering penetration and battlefield survivability of aircraft. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Surface to air missiles

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Ultrafast near-infrared pyroelectric detector based on inhomogeneous plasmonic metasurface

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Light(science & Applications) 2024年第11期13卷 2566-2575页

作者： Youyan Lu Liyun Liu Ruoqian Gao Ying Xiong Peiqing Sun Zhanghao Wu Kai Wu Tong Yu Kai Zhang Cheng Zhang Tarik Bourouina Xiaofeng Li Xiaoyi Liu School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou 215006China Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of China Soochow UniversitySuzhou 215006China Suzhou Institute of Biomedical Engineering and Technology of the Chinese Academy of Sciences Suzhou 215163China College of Intelligence Science and Technology National University of Defense TechnologyChangsha 410073China Laboratory of Science and Technology on Integrated Logistics Support National University of Defense TechnologyChangsha 410073China State Key Laboratory of Silicon and Advanced Semiconductor Materials Zhejiang UniversityHangzhou 310027China ESYCOM Lab UMR 9007 CNRSUniv Gustave Eiffel77454 Marne-la-ValléeFrance CINTRA IRL 3288 CNRS-NTUTHALESNanyang Technological UniversitySingapore 637553Singapore

Pyroelectric(PE)detection technologies have attracted extensive attention due to the cooling-free,bias-free,and broadband ***,the PE signals are generated by the continuous energy conversion processes from light,heat,to electricity,normally leading to very slow response ***,we design and fabricate a PE detector which shows extremely fast response in near-infrared(NIR)band by combining with the inhomogeneous plasmonic *** plasmonic effect dramatically accelerates the light-heat conversion process,unprecedentedly improving the NIR response speed by 2−4 orders of magnitude to 22μs,faster than any reported infrared(IR)PE *** also innovatively introduce the concept of time resolution into the field of PE detection,which represents the detector’s ability to distinguish multiple fast-moving ***,the spatially inhomogeneous design overcomes the traditional narrowband constraint of plasmonic systems and thus ensures a wideband response from visible to *** study provides a promising approach to develop next-generation IR PE detectors with ultrafast and broadband responses.

关键词： inhomogeneous plasmon overcome

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