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使用光谱分析实现弯管中两相流含气率的预测

光谱学与光谱分析 2025年第1期45卷 231-238页

作者：车少敏马世一刘雪婧殷雄周延熊兵李锟李飞西安交通大学能源与动力工程学院陕西西安710049 中国航发四川燃气涡轮研究院四川成都610500 西安石油大学电子工程学院陕西西安710065

空气被夹带进入发动机润滑油系统形成油气两相流后,会严重影响润滑系统的正常运行。因此实现发动机润滑油系统中油气两相流含气率的准确和快速测量具有十分重要的意义。基于光谱匹配方法,对发动机润滑油系统在弯管处的油气两相流含气率... 详细信息

空气被夹带进入发动机润滑油系统形成油气两相流后,会严重影响润滑系统的正常运行。因此实现发动机润滑油系统中油气两相流含气率的准确和快速测量具有十分重要的意义。基于光谱匹配方法,对发动机润滑油系统在弯管处的油气两相流含气率进行了测量研究。首先使用近红外、可见光和紫外光谱仪获取油气两相流在2个流速、5个温度工况下0.10%~1.00%含气率范围(间隔0.06%)的吸光度数据并进行分析,确认油气两相流在三个波段下均有吸收,且吸收强度与含气率有关;其次提出将数据预处理结合光谱相似性测度方法并应用于弯管含气率光谱分析中,显著降低了基于原始光谱的含气率预测的最大相对误差。在近红外波段通过使用数据增强方法如中心化(center)和标准化(autoscaling)并结合光谱角余弦方法,得出新润滑油的含气率最大相对误差相对于原始光谱得到的数值从48%降低到36%。利用该方法分别在三个波段进行含气率预测,试验工况包括2个流速、5个温度,分析了两相流的温度和流速对含气率预测的影响。温度30.0℃,流速5.1 m·min^(-1)下,含气率信息在紫外波段(193.5~413.8 nm)与光谱向量的方向或形状差异的联系更为紧密,含气率预测的最大相对误差仅为6%。在近红外和可见光波段,流速或温度一定时,最大相对误差随着温度或流速的增加均有减小趋势。紫外波段下温度对含气率预测效果没有特定的影响规律,随着两相流的流速增加,含气率预测的最大相对误差有增大趋势。结果表明对于透光性较好的新润滑油,使用紫外光谱仪进行含气率数据的采集,含气率的预测选用标准化预处理结合光谱角余弦方法,得到的含气率预测最大相对误差最小。

关键词：气液两相流含气率光谱分析光谱匹配

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Open reduction and Herbert screw fixation of Pipkin type IV femoral head fracture in an adolescent:A case report

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World Journal of Clinical Cases 2021年第4期9卷 898-903页

作者： Yao liu Jin Dai Xiao-Dong Wang Zhi-xiong Guo lun-Qing Zhu Yun-Fang Zhen Department of Orthopaedics Children’s Hospital of Soochow UniversitySuzhou 215000Jiangsu ProvinceChina

BACKGROUND Femoral head fracture is extremely rare in *** may be the youngest patient with femoral head fracture ever reported in the *** are few pediatric studies that focus on cases treated with open reduction via the modified Hardinge *** SUMMARY A 14-year-old female adolescent suffered a serious traffic accident when she was sitting on the back seat of a motorcycle.A pelvic radiograph and computed tomography revealed a proximal femoral fracture and slight acetabular rim *** was diagnosed as a Pipkin type IV femoral head *** open reduction and Herbert screw fixation was performed via a modified Hardinge *** 1-year follow-up,the patient could walk without aid and participate in physical *** X-ray results showed that the fractures healed well with no evidence of *** Open reduction and Herbert screw fixation is an available therapy to treat Pipkin type IV femoral head fractures in children.

关键词： Pipkin classification Femoral head fracture Adolescent Fracture fixation Case report

Controllably elevating the initial Coulombic efficiency of Li3VO4 anode via a facile electrode pre-lithiation technique for lithium-ion batteries

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Science China Chemistry 2025年

作者： Haoyue Liang Xingguo Zhong Guxin Huang Wenpan liu Yao liu Shuhao Wang Deyu Wang Hao liu Hao Wang Tianyou Zhai Huiqiao Li State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Shenzhen Research Institute of Huazhong University of Science and Technology Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education) School of Optoelectronic Materials &Technology Jianghan University Centre for Clean Energy Technology Faculty of Science University of Technology Sydney Yichang Brunp Recycling Technology Co. Ltd.

Li3VO4has been a promising insertion anode material for Li-ion batteries,which has high theoretical capacity (up to～600 mAh g-1) and safe Li insertion voltage （0.5–1 V ***/Li+）.However,the low initial Coulombic efficiency （ICE） has always been the bottleneck limiting its ***,we propose a facile pre-lithiation method to controllably elevate the ICE by the post-treatment of the prepared Li3VO4composite electrode based on an immersion *** this process,the whole electrode was immersed in the liquid Li source,via which the ICE of the Li3VO4electrode can be controllably elevated from 80%to over 100%within 5 min of *** than the traditional powder treatment for pre-lithiation,this process we proposed minimizes the impact of pre-lithiation on the battery assembly ***,we further investigated the effect of this pre-lithiation process on the functional components in the *** the first time the ICE of Li3VO4electrode was elevated to 100%.As a result,the initial reversible capacity of LiFePO4||Li3VO4full cell was improved from 44.0 to146.3 m Ah g-1,demonstrating the feasibility and great potential of the process.

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A Large-Scale Scheduling Method for Multiple Agile Optical Satellites

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Computer Modeling in Engineering & Sciences 2023年第8期136卷 1143-1163页

作者： Zheng liu Wei xiong Minghui xiong Science and Technology on Complex Electronic System Simulation Laboratory Space Engineering UniversityBeijing101416China

This study investigates the scheduling problem ofmultiple agile optical satelliteswith large-scale *** problem is difficult to solve owing to the time-dependent characteristic of agile optical satellites,complex constraints,and considerable solution *** solve the problem,we propose a scheduling method based on an improved sine and cosine algorithm and a task merging *** first establish a scheduling model with task merging constraints and observation action constraints to describe the ***,an improved sine and cosine algorithm is proposed to search for the optimal solution with the maximum profit *** adaptive cosine factor and an adaptive greedy factor are adopted to improve the ***,a taskmerging method with a task reallocation mechanism is developed to improve the scheduling *** results demonstrate the superiority of the proposed algorithm over the comparison algorithms.

关键词： Multiple agile optical satellites scheduling task merging sine and cosine algorithm task reallocation

Focal Mechanism and Rupture Process of the 2012 M_w 7.0 Santa Isabel, Mexico Earthquake Inverted by Teleseismic Data

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Journal of Earth Science 2015年第3期26卷 384-390页

作者： Chengli liu Yong Zheng xiong xiong State Key Laboratory of Geodesy and Earth's Dynamic Institute of Geodesy and Geophysics Chinese Academy of Sciences

The point source parameters of the April 12, 2012 Mw 7.0 Santa Isabel, Mexico, earthquake indicated by teleseismic P and SH waveforms obtained by a means of traditional cut and paste（CAP） method show that the best double-couple solution of this event is： 37°/127°, 90°/81° and-9°/-180° for strike, dip and rake, respectively. Its centroid depth is 13 km. Global teleseismic waveform data exhibit that the rupture of the earthquake initiated at a focal depth of 13 km and propagated southeastward with a relatively slow rupture velocity（about 1.8 km/s on average）. The maximum slip occurred at 30 km southeast of the hypocenter, with the peak slip of 3.57 m and total seismic moment of whole fault up to 3.98×1019 N·m. These observations provide some insight into properties, co- or post-seismic deformation and coulomb stress changes of future earthquake in this area.

关键词： Mexico Earthquake rupture velocity focal mechanism slip history

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Ru doping triggering reconstruction of cobalt phosphide for coupling glycerol electrooxidation with seawater electrolysis

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Journal of Energy Chemistry 2025年第1期100卷 317-326页

作者： Binglu Deng Jie Shen Jinxing Lu Chuqiang Huang Zhuoyuan Chen Feng Peng Yunpeng liu School of Materials Science and Hydrogen Energy Foshan University School of Chemistry and Chemical Engineering Guangzhou University Guangdong Key Laboratory for Hydrogen Energy Technologies

Seawater electrolysis is a promising approach for sustainable energy without relying on precious ***,the large-scale seawater electrolysis is hindered by low catalytic efficiency and severe anode corrosion caused by the harmful *** contrast to the oxygen evolution reaction （OER）and chlorin ion oxidation reaction （ClOR）,glycerol oxidation reaction （GOR） is more thermodynamically and kinetically favorable ***,a Ru doping cobalt phosphide （Ru-CoP2） is proposed as a robust bifunctional electrocatalyst for seawater electrolysis and GOR,for the concurrent productions of hydrogen and value-added *** in situ and ex situ characterization analyses demonstrated that Ru doping featured in the dynamic reconstruction process from Ru-CoP2to Ru-CoOOH,accounting for the superior GOR *** coupling GOR with hydrogen evolution was realized by employing Ru-CoP2as both anode and cathode,requiring only a low voltage of 1.43 V at 100 mA cm-2,which was 250 m V lower than that in alkaline *** work guides the design of bifunctional electrocatalysts for energy-efficient seawater electrolysis coupled with biomass resource upcycling.

关键词： Anodes

Near-perfect replication on amorphous alloys through active force modulation based on machine learning/neural network parameter prediction

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 181-191页

作者： Senkuan Meng Zheng Wang Ruisong Zhu Ruijie liu Jiang Ma Lina Hu Weihua Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) School of Materials Science and Engineering Shandong University College of Mechatronics and Control Engineering Shenzhen University Songshan Lake Materials Laboratory Institute of Physics Chinese Academy of Sciences

As a microforming technique, micro/nano-structural replication possesses advantages of high precision and efficiency. With the remarkable superplasticity in the supercooled liquid region, amorphous alloys or metallic glasses(MGs) are regarded as ideal materials for miniature fabrication. However, due to the intrinsic metastable nature of supercooled liquids, the design of imprinting processes for MGs poses a challenge. In the past, process parameters have largely relied on trial-and-error *** this work, a low-frequency active force modulation system is employed to apply a stable, precise, and real-time feedback stress field for imprinting of MG samples. Low-frequency vibrations can facilitate the filling of microstructures on the template surface by reducing the effective viscosity of the supercooled liquid. With the dataset composed of orthogonal experiments, a machine learning strategy based on back-propagation(BP) neural networks was utilized to construct a 3D parameter space for temperature, stress, and time, and to predict the corresponding filling ratio. Furthermore, the optimal combination of imprinting process parameters was identified, and its filling ratio was experimentally validated to reach as high as 0.94. The near-perfect replication of microstructures confirms the superiority of the active force modulation system and the data-driven strategy of machine learning-assisted parameter design. At the same time, this one-step microforming process provides a new approach to addressing the accuracy-cost trade-off dilemma in precision manufacturing.

关键词： metallic glass amorphous alloy microforming imprinting machine learning

Plant target of rapamycin signaling network:Complexes,conservations,and specificities

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Journal of Integrative Plant Biology 2022年第2期64卷 342-370页

作者： Yanlin liu Yan xiong College of Life Sciences Fujian Agriculture and Forestry UniversityFuzhou350002 China Crop Synthetic Biology Center Haixia Institute of Science and TechnologyFujian Agriculture and Forestry UniversityFuzhou350002 China

Target of rapamycin(TOR)is an evolutionarily conserved protein kinase that functions as a central signaling hub to integrate diverse internal and external cues to precisely orchestrate cellular and organismal *** evolution,TOR both maintains the highly conserved TOR complex compositions,and cellular and molecular functions,but also evolves distinctive roles and strategies to modulate cell growth,proliferation,metabolism,survival,and stress responses in ***,we review recent discoveries on the plant TOR signaling *** present an overview of plant TOR complexes,analyze the signaling landscape of the plant TOR signaling network from the upstream signals that regulate plant TOR activation to the downstream effectors involved in various biological processes,and compare their conservation and specificities within different biological ***,we summarize the impact of dysregulation of TOR signaling on every stage of plant growth and development,from embryogenesis and seedling growth,to flowering and senescence.

关键词： abiotic and biotic stress hormone sensing metabolism regulation nutrient sensing plant growth and development target of rapamycin transcriptional reprogramming translational regulation

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All-day solar power generation enabled by photo/thermoelectric conversion and thermal energy storage

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Science China Chemistry 2025年

作者： Zijian liu Chengzhi Chen Junda liu Qi Sun Bingchen Huo Chunyu Du Guangming Chen College of Materials Science and Engineering Shenzhen University

Thermoelectric materials hold promises for direct conversion of heat into electricity, making them viable power sources for electronic devices. However, their practical applications in diverse outdoor environment are hindered by limited and discontinuous electricity output. In this study, we propose an all-day solar power generator to achieve highly efficient and continuous electricity generation by harnessing the synergistic effects of photoelectric-thermoelectric conversion and latent thermal energy storage. The all-day solar power generator exhibits an average open-circuit voltage of 6.8 m V during daylight and a remaining 0.9 mV during nighttime. Importantly, the all-day solar power generator achieves dependable outdoor power supply for communication transmission in diverse environmental scenarios. Our research opens a new way for highly efficient and sustainable power generation.

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