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Biomarker detection based on nanoparticle-induced ultrasonic Rayleigh scattering

Microsystems & Nanoengineering 2024年第6期10卷 341-350页

作者： Wangyang Zhang Chaoshan Zhao Haoliang Jia Tao Liu Jiaqian Yang Pengfan Wu Xiaojing Mu Key Laboratory of Optoelectronic Technology and Systems Ministry of Education and International Research and Development Center of Micro-Nano Systems and New Materials TechnologyChongqing UniversityChongqing 400044China

Ultrasonic biochemical detection is important for biomarker detection,drug monitoring,and medical diagnosis,as it can predict disease progression and enable effective measures to be taken in a timely ***,the ultrasonic technology currently used for biochemical marker detection is directly modified on the surface of the *** associated test methods are costly and unreliable while having poor repeatability;therefore,they cannot achieve low-cost rapid *** this study,a detection mechanism based on the Rayleigh scattering of acoustic waves caused by nanoparticles,which causes changes in the received sound pressure,was developed for the first *** modification of antibodies on an insertable substrate decouples the functionalization step from the sensor surface and facilitates the application of capacitive micromachined ultrasonic transducers(CMUTs)in conjunction with Au nanoparticles(AuNPs)for CA19-9 cancer antigen detection.A corresponding detection theory was established,and the relevant parameters of the theoretical formula were verified using different *** our fabricated CMUT chip with a resonant frequency of 1 MHz,the concentrations and substances of the CA19-9 antigen markers were successfully *** the concentration range of 0.1–1000 U/mL,the receiving voltage decreased with increasing *** investigations revealed that the influence of other interfering markers in the human body can be ignored,demonstrating the feasibility and robustness of biochemical detection based on CMUTs combined with nanoparticles.

关键词： diagnosis scattering Rayleigh

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Effect of Graphite Addition on Microstructure, Mechanical Properties and Thermal Properties of Injection Molded AZ91D Alloy+1

引用

Materials Transactions 2024年第4期65卷 374-380页

作者： Hideshima, Yasutoshi Maeda, Fumiya Fukuta, Tadao Ozaki, Koichi Course of Advanced Systems Engineering Graduate School of Computer Science and Systems Engineering Okayama Prefectural University Soja719-1197 Japan Process Technology Development Department Technology Development Division Seiko Epson Corp. Suwa399-0211 Japan Department of Systems Engineering Faculty of Computer Science and Systems Engineering Okayama Prefectural University Soja719-1197 Japan

Magnesium chips were coated with a high concentration of graphite using a binder and were used as the raw material for injection molding. The microstructure of the magnesium injection-molded product with added graphite exhibited a dispersion of needle-like graphite particles. No significant voids were observed at the interfaces between the graphite and the matrix. The addition of more than 0.5 mass% graphite decreased the proof stress and tensile strength of the injection-molded products. The Young’s modulus of the graphite-added products tended to decrease with an increase in the graphite content, which is consistent with the lower limit of the rule of mixtures. The thermal conductivity of the 6.9 mass% graphite-added product increased compared with that of the AZ91D magnesium alloy and the coefficient of linear thermal expansion decreased. Both values are within a range that satisfied the rules of mixtures. © 2024 The Japan Institute of Metals and Materials.

关键词： Thermal expansion

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HIGH EXPLOSIVES AS NOVEL RAPID GAS GENERATORS

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International Journal of Energetic Materials and Chemical Propulsion 2025年第4期24卷 1-12页

作者： Kumar, K. Sunil Chakraborty, A. Srinivasan, R. Srikanth, I. Srinath, S. Advanced Systems Laboratory Defence Research & Development Organisation Hyderabad India Department of Chemical Engineering National Institute of Technology Warangal India

Explosives are materials that rapidly generate high-temperature gases. This study focuses on transforming the energy from high explosives into controlled gas-generating compositions for practical applications. A pentaerythritol tetranitrate–based linear mild detonating cord (MDC) with a 5 g/m core load density was selected for investigation. MDCs of 200, 250, and 500 mm were tested within a 500 cc closed vessel (CV), where the pressure produced was measured internally. The measured pressure was compared to theoretical predictions, showing a strong correlation. Upon initiating the cord, the explosive reaches peak pressure, which decreases exponentially over time. This innovative approach to harnessing high explosive energy for gas generation is beneficial in systems requiring rapid actuation, typically within milliseconds. In contrast, traditional pyrotechnic gas generators (GG) have activation times in the range of hundreds of milliseconds, making them slower. For GG applications, it is essential to design a gas chamber that is completely leak proof to ensure efficient energy transfer. This technology applies to systems such as stage separation and payload fairing separation systems, where minimal shock, no debris, and smoke-free operation are critical. The remote initiation of MDC is beneficial for demonstrating redundancy in initiation, providing reduced shock, safer detonation transfer, and enabling simultaneous multipoint initiation. In this research, remote initiation was achieved using a low-caliber explosive cord with a density of 0.5 g/m MDC. Additionally, leak-proof end connectors were developed to contain gases within the CV. © 2025 by Begell House, Inc.

关键词： Detonation

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EXPERIMENTAL AND NUMERICAL RESEARCH ON ADSORPTION OF MESUROL SOLUTION IN FIXED-BED CORN SEED TREATMENT

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UPB Scientific Bulletin, Series D: Mechanical Engineering 2024年第1期86卷 251-268页

作者： Ipate, George Fatu, Viorel Voicu, Gheorghe Dept. of Biotechnical Systems National University of Science and Technology POLITEHNICA Bucharest Romania Institute of Plant Protection Research and Development Romania

In this study, the adsorption of liquid mesurol (with the active substance methiocarb-1.25 mg/seed, Bayer Cropscience), a repellent insecticide that prevents damage caused by wild animals, birds and insects, is investigated by corn seeds in a fixed bed. To study the adsorption capacity of the seeds on a laboratory scale, they were placed in a 450 ml glass tube with a diameter of 50 mm. An increase in the initial concentration of the solution decreased the adsorption yield, while decreasing the bed length and solution flow rate led to a higher adsorption capacity. The highest seed bed adsorption capacity value of 1.82e-5 mg/g was obtained using a seed bed with a length of 200 mm, and a solution concentration of 48 mg/l at a flow rate of 9 ml/min. The experimental data obtained by taking samples at an interval of 5 min were tested with the model proposed by Ogata-Banks, which approximates the experimental conditions quite well, even if it also presents some discrepancies. Finally, an adaptive neuro-fuzzy inference system (ANFIS) was used to estimate the adsorption curve, using the data series resulting from the measurements, which indicated a good statistical prediction in terms of relative errors. © 2024, Politechnica University of Bucharest. All rights reserved.

关键词： Adsorption

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Verification of the Applicability of Fifth Generation Mobile Communication systems to Railway Operations

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Quarterly Report of RTRI (Railway Technical Research Institute) 2023年第2期64卷 103-108页

作者： Nakamura, Kazuki Kitano, Takayasu Kawasaki, Kunihiro Telecommunications and Networking Laboratory Information and Communication Technology Division Japan Train Control Systems Laboratory Signalling and Operation Systems Technology Division Japan Research and Development Promotion Division Japan

The 5th generation mobile communication system (5G), provided by mobile network operators (MNOs), is expected to dramatically improve three characteristics, namely, "enhanced Mobile Broadband (eMBB)," "Ultra-Reliable and Low Latency Communications (URLLC)," and "massive Machine Type Communication (mMTC)," compared to conventional mobile communication systems. The introduction of 5G services in railways is expected to lead to the introduction of new applications that could not be realized with conventional ground-to-train communication systems. Therefore, this paper outlines our current research on the introduction of public 5G services provided by MNOs to railway operations and the results obtained so far. © 2023 Ken-yusha Inc.. All rights reserved.

关键词： 5G mobile communication systems

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Plane-controlled growth strategy improves electrochemical performance of cobalt-free LiNi0.9Mn0.1O2 cathode

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Progress in Natural Science:Materials International 2024年第3期34卷 569-577页

作者： Hao Tong Xun Yuan Ningbo Qin Yaocong Han Yan Cheng Fangli Ji Ruirui Tuo Changlang Liang Yi Wang Qilin Tong Zhaozhe Yu Guangxi Key Laboratory of Manufacturing Systems and Advanced Manufacturing Technology Guilin University of Electronic Technology Guangxi CNGR New Energy Science & Technology Co. LTD. Guangxi Institute of Science and Technology Development Co. LTD. School of Chemistry and Chemical Engineering Guangxi Minzu University

The ultra-high nickel-layered cathodes（Ni ≥ 90 %） has garnered significant attention due to its high specific capacity. However, the widespread application of ultra-high nickel-layered cathodes still suffers limitation by structural instability and poor rate performance. Herein, a crystal-face-induced strategy is proposed to enhance rate and cycling performances of the electrode by constructing rapid Li+diffusion channel and reducing internal grain boundaries of secondary particles. The crystal-face-induced strategy facilitates the growth of {010} lattice plane. Highly exposed {010} planes provide wide-open and unobstructed channels for Li+deintercalation/intercalation, enhances the electrode diffusion kinetics, and thus improves the electrode rate performance. In addition, this strategy promotes the primary particle growth, reduces the grain boundaries of secondary particles and mitigates the electrode/electrolyte interface side reactions, enhancing the structural stability and cycling life of the electrode. Accordingly, the modified sample achieved a reversible specific capacity of 198.3 mAh g-1at 1 C(1 C = 180 mA g-1) and maintained a capacity retention rate of 88.5 % after 100 cycles, higher than that of the original sample(73.6 %, 146 mAh g-1). At the high rate of 5 C, it can maintain a high specific capacity of 178mAh g-1（capacity retention rate of 99 %） after 150 cycles. This work is a leap in ultra-high nickel-layered cathodes development and provides insights into the design of electrode materials for other batteries.

关键词： Plane-controlled growth strategy Cobalt-free nickel-rich cathode Rate and cycling performances Lithium-ion battery

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Simulation and Experiment of Windage Power Loss of A Shrouded Spiral Bevel Gears under Oil Injection Lubrication

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Chinese Journal of Mechanical Engineering 2025年第2期38卷 413-432页

作者： Bo Li Kai Rong Xuyang Zhang Sanmin Wang U-Xuan Tan Xuanyuan Su Laifa Tao School of Mechanical Engineering Northwestern Polytechnical University Department of Engineering Product Development Singapore University of Technology and Design Hangzhou International Innovation Institute Beihang University National Key Laboratory of Science and Technology on Reliability and Environmental Engineering School of Reliability and Systems Engineering Beihang University

During high-speed rotation, the surface of aeronautic spiral bevel gears will generate significant pressure and viscous forces, which will cause a certain amount of windage power loss and reduce the efficiency of the transmission system. Based on the computational fluid dynamics, this paper analyzes the windage power loss of a single spiral bevel gear and a spiral bevel gear pair under oil injection lubrication. In addition, the shroud is used to suppress gear windage loss, and the clearance size and opening angle of the designed shroud are optimized. Finally, by comparing and analyzing the experimental results, the following conclusions were obtained:(1) For a single gear, the speed is the most important factor affecting windage loss, followed by the hand of spiral, and rotation direction;(2) For gear pairs, under oil injection lubrication, the input speed has the greatest impact on windage power loss, followed by the influence of oil injection port speed, temperature and oil injection port pressure;(3) Installing a shroud is an effective method to reduce windage power loss;(4) In the pure air phase, the smaller the clearance between the shroud and the gear surface, and the smaller the radial direction between the shroud and the shaft, the better the effect of reducing windage;(5) In the two-phase flow of oil and gas, it is necessary to design oil drainage holes on the shroud to ensure the smooth discharge of lubricating oil and improve the drag reduction effect.

关键词： Computational fluid dynamics (CFD) Oil injection lubrication Shroud Spiral bevel gear Windage power loss

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Fabrication of SiC particle dispersed AZ91D magnesium alloy composite by injection molding method and their properties

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Keikinzoku/Journal of Japan Institute of Light Metals 2024年第3期74卷 141-146页

作者： Hideshima, Yasutoshi Maeda, Fumiya Fukuta, Tadao Ozaki, Koichi Graduate School of Computer Science and Systems Engineering Okayama Prefectural University 111 Kuboki Okayama Soja-shi719-1197 Japan Process Technology Development Department Technology Development Division Seiko Epson Co. Suwa-shi Nagano Japan Faculty of Computer Science and Systems Engineering Okayama Prefectural University Okayama Soja-shi Japan

AZ91D magnesium alloy chips were coated with SiC powder using a binder, and injection molding was attempted using SiC powder coated magnesium chips as raw material. The metallurgical structure of the injection molded products showed uniform dispersion of SiC particles in the matrix, and there were no significant defects such as voids at the SiC particle-matrix interface. The hardness and 0.2% proof stress of the injection molded products tended to improve with increasing SiC content, while the elongation decreased with increasing SiC content. The Young's modulus of the injection molded products improved with increasing SiC content. It was confirmed that the specific bending rigidity of the injection molded products also improves due to the significant increase in the Young's modulus, although the addition of SiC leads to an increase in density. © 2024 The Japan Institute of Light Metals.

关键词： Silicon carbide

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Research on Impedance Characteristics of High Speed Differential via 4

Research on Impedance Characteristics of High Speed Differen...

引用

4th International Conference on Electronic Information Engineering and Computer Science, EIECS 2024

作者： Li, Yongcui Ci, Tanlong Ieit Systems Co. Ltd. Department of Technology Research and Development Jinan China

ISBN: (纸本)9798331531409

This paper analyzes the factors that affect the impedance of PCIE5.0 differential via on high-speed PCB boards. At the same time, it analyzes the decisive factors that affect the impedance of via when the length of via is long due to thick PCB layers, and proposes optimization solutions. The simulation results show that after via length exceeds 80mil, the impedance caused by parasitic inductance increases significantly. By changing via size and pitch, it was found that increasing via size can significantly reduce via impedance;However, for via in the BGA area, via size and pitch spacing are strictly limited, and changing the antipad cannot eliminate the impedance increase caused by parasitic inductance. Therefore, in the design of high-speed circuit boards, it is necessary to optimize differential via impedance for various influencing factors. At the same time, when designing high-speed boards, try to adjust the routing layer to avoid BGA area and shorten via length as much as possible. © 2024 IEEE.

关键词： Printed circuit boards

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Synergistic strategy of surface-induced spinel structure and F doping to improve the electrochemical performance of Li-rich cathodes

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Progress in Natural Science:Materials International 2024年第3期34卷 524-531页

作者： Yuezhen Wang Ningbo Qin Xun Yuan Shiming Qiu Fangli Ji Ruirui Tuo Tingfeng Guan Cheng Yang Jiang Zhu Miao Ge Hui Wang Yan Cheng Zhaozhe Yu Guangxi Key Laboratory of Manufacturing Systems and Advanced Manufacturing Technology Guilin University of Electronic Technology Guangxi Institute of Science and Technology Development Co. Ltd. Guangxi CNGR New Energy Science & Technology Co. Ltd. Guangxi Key Laboratory for High-value Utilization of Manganese Resources Guangxi Minzu Normal University

Li-rich Mn-based materials provide higher capacity than commercial NCM layered materials due to the synergistic redox effect of cations and anions. However, lattice straining and structural collapse caused by the irreversible oxygen release at high voltage range during cycling, which results in severe capacity and voltage decay. Herein, a synergistic strategy of surface-induced spinel structure and F doping is provided to improve the structural stability. The surface spinel structure helps to reduce the structural collapse caused by electrolyte corrosion on the cathode and effectively inhibits voltage decay resulted from structural evolution. The stronger Mn-F bonds are formed by F doping to inhibit migration of transition metal(TM) and induce the uniform deposition of Li F to form the thinner and more stable CEI on the cathode. Accordingly, the designed cathode(LMNO-NF) shows remarkable cycling performance with the capacity retention of 86.68 % and voltage retention of 96.6 % for 200 cycles at 1C,higher than pristine material(68.76 % and 85.75 %). Therefore, this simple dual-modification strategy of one-step synthesis is promising for solving the structural evolution and voltage decay of Li-rich Mn-based cathode materials effectively, achieving further commercialization.

关键词： Synergistic strategy Surface-induced spinel structure F doping High cycling stability Li-rich Mn-Based cathode

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