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46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2024

作者： Song, Xinyue Zan, Xuequan Fu, Zhizhong Ding, Xiaorong University of Electronic Science and Technology of China School of Life Science and Technology Chengdu China Chengdu Empsun Medical Science and Technology Com. Ltd Department of Development and Administration Chengdu China

ISBN: (纸本)9798350371499

The key to cuffless blood pressure (BP) estimation lies in identifying the efficient noninvasive features or signals that can indicate BP changes. Most these features are identified based on their correlation with BP. However, the correlation does not imply causation, as there might be confounders impacting the relationship between the features and BP. In this study, we introduce causal inference to identify the confounders that can possibly affect the accuracy of the commonly studied pulse transit time (PTT) based cuffless BP estimation. We further propose a hierarchical regression model to address the impact of the confounder thereby improving the estimation performance. We first build the causal graph of BP and common features extracted from electrocardiogram (ECG) and photoplethysmogram (PPG) signals with the fast causal inference algorithm and causal generative neural network. We found heart rate is the main confounder that impacting the relationship between PTT and BP. To consider the effect of the confounder, we then developed a hierarchical regression model for cuffless BP estimation. We validated the proposed method on 17 subjects, and the results show that the mean absolute difference (MAD) of the estimated systolic BP and diastolic BP were 6.29 mmHg and 5.03 mmHg respectively, which significantly outperformed the linear regression model without the hierarchical strategy. © 2024 IEEE.

关键词： Blood pressure

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Impacts of proppant distribution on development of tight oil reservoirs with threshold pressure gradient

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Petroleum science 2024年第1期21卷 445-457页

作者： Ming Yue Wei-Yao Zhu Fei-Fei Gou Tian-Ru Song Yu-Chun You Qi-Tao Zhang State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing102206China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing100083China

Field evidence indicates that proppant distribution and threshold pressure gradient have great impacts on well *** at the development of unconventional oil reservoirs in Triassic Chang-7 Unit,Ordos Basin of China,we presented an integrated workflow to investigate how(1)proppant placement in induced fracture and(2)non-linear flow in reservoir matrix would affect well productivity and fluid flow in the *** with our research before(Yue et al.,2020),here we extended this study into the development of multi-stage fractured horizontal wells(MFHWs)with large-scale complicated fracture *** integrated workflow is based on the finite element method and consists of simulation models for proppant-laden fluid flow,fracture flow,and non-linear seepage flow,*** results indicate that the distribution of proppant inside the induced cracks significantly affects the productivity of the *** we assign an idealized proppant distribution instead of the real distribution,there will be an overestimation of 44.98%in daily oil rate and 30.63%in cumulative oil production after continuous development of 1000 ***,threshold pressure gradient(TPG)also significantly affects the well performance in tight oil *** we simply apply linear Darcy’s law to the reservoir matrix,the overall cumulative oil production can be overrated by 77%after 1000 days of *** general,this research provides new insights into the development of tight oil reservoirs with TPG and meanwhile reveals the significance of proppant distribution and non-linear fluid flow in the production scenario design.

关键词： Proppant distribution Tight oil reservoir Multi-stage fractured horizontal well Threshold pressure gradient Moving boundary

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Interlinked water and sediment microplastics in the Laizhou Bay of China

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Journal of Oceanology and Limnology 2025年第2期43卷 446-458页

作者： Hong CHEN Fenghua JIANG Jingxi LI Wei CAO Di ZHANG Futao ZHANG Shiliang WANG Chengjun SUN College of Safety and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Analytical Technology Development and Offshore Eco-Environment Conservation First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Qingdao National Laboratory of Marine Science and Technology Laboratory of Marine Drugs and Biological ProductsQingdao 266071China

To explore the relationship of microplastic pollution in different media in marine environment,microplastics in the surface seawater and sediments of Laizhou Bay,Bohai Sea,North China,were *** samples were collected using a pre-concentrator equipped with a 20-μm mesh size sieve,and sediment samples were collected by a box *** shape,color,size,and type of microplastics were obtained by a stereomicroscope and a Fourier transform infrared spectrometer(ATR-μ-FT-IR).Results show that the abundance of microplastics in the surface seawater of Laizhou Bay was 858.3±573.2 items/m~3,and that of microplastics in sediments was 151.0±77.4 items/kg dry weight(d.w.)The microplastics in seawater and sediments were mainly ***,the microplastics in seawater were mainly transparent,and those in sediments were transparent and *** highest proportion of microplastics in seawater was rayon(77.48%),followed by polyethylene terephthalate(PET,13.17%).The highest proportion of microplastics in sediments was rayon(73.66%),followed by PET(8.90%).The size of microplastics in 1000-2000μm accounted for the largest proportion of 28.54%in seawater,while that in 500-1000μm took 27.93%in *** in seawater and sediment showed medium-level *** seawater,microplastic abundance was higher in offshore and nearshore areas of *** sediment,microplastic abundance was higher in offshore and nearshore areas of *** results of the principal component analysis(PCA)indicated that microplastics in sediment exhibited greater stability compared to those in *** microplastics in seawater and sediment show a positive correlation in terms of shape and plastic type,while exhibiting a negative correlation in terms of ***,microplastics in sediments were smaller in size,and those in seawater and sediments had consistent size distribution characteristics in space.

关键词： microplastic Laizhou Bay sediment seawater correlation

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Investigation of methanogenic potential of typical and mixed components of food waste based on single-staged and two-staged hydrothermal pretreatment

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International Journal of Hydrogen Energy 2025年 139卷 1043-1053页

作者： Yang, Mingming Hungwe, Douglas Cai, Zhengqing Chen, Xueli Ding, Lu Yu, Guangsuo Wang, Fuchen Institute of Clean Coal Technology East China University of Science and Technology Shanghai200237 China Research and Development Center Hosei University Tama Campus 4342 Aihara Machida Tokyo1940298 Japan College of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China

During anaerobic digestion (AD), methanogens use hydrogen, carbon dioxide and acetic acid as energy carriers and carbon sources to grow and generate methane. Based on the optimum hydrothermal temperature of three typical components of food waste (FW), two-staged hydrothermal method is proposed to strengthen the process of methane production. The results show that single-staged hydrothermal pretreatment could significantly promote the methanogenic potential. However, when the hydrothermal temperature is further increased, the methane production of the mixed component decreases rapidly (from 186.18 mLCH4·g−1VS at 160 °C to 93.20 mLCH4·g−1VS at 200 °C). To eliminate the effect of temperature, two-staged hydrothermal pretreatment is adopted. This method is more efficient in terms of methane production. Three-dimensional excitation-emission matrix fluorescence region integration (3DEEM-FRI) analysis indicate that 140 °C was the critical temperature for the mass production of melanoidin. The fluorescence spectra reveal that the formation of melanoidin is accompanied by the consumption of protein substrates, in which content has been reduced by two-staged hydrothermal method. In summary, two-staged hydrothermal method can effectively improve the methane production of FW. © 2024 Hydrogen Energy Publications LLC

关键词： Anaerobic digestion

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Structural design for open gap stamping press

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International Journal of Advanced Manufacturing technology 2024年第1-2期134卷 853-870页

作者： Chang, Chia-Hung Liao, Bing-Jyun Kuo, Chun-Chih Department of Mechatronics Engineering National Kaohsiung University of Science and Technology (First Campus) Metal Product Development Technology R & amp D Center National Kaohsiung University of Science and Technology (First Campus)

The proposed paper uses Taguchi design of experiments and topology optimization to design a low throat angle and lightweight structure of an open gap (C-frame) stamping press. First, finite element analysis was used for discussing the effects of frame structure deformation by various parameters, such as upper round corner (R₁), eccentric distance of upper round corner (L₁), throat depth (K), lower round corner of throat (R₂), and eccentric distance of lower round corner of throat (L₂). With throat angle as the quality objective, we conducted single-objective optimization using Taguchi’s smaller-the-better formula. The optimal values of the quality objectives were as follows: R₁ was 60 mm, L₁ was 30 mm, L₂ was 340 mm, and R₂ was 48 mm, the resulting throat angle of which was 0°1′18.99″. The throat angle resulting from this parameter combination in the static analysis with 44% force area was 0°1′18.50″. The weight of the frame was approximately 5971 kg. We also confirmed the influence of the four process parameters on the quality objectives and their mathematical relationships using analysis of variance (ANOVA) and multiple regression analysis. Next, LSM (level set method) topology optimization was used to create an optimized structure. The analysis of the optimized structure using LSM showed that the deformation with 100% force area increased by 2.6%. However, the throat angle decreased by 0°0′0.78″, and the mass of the machine dropped by 444 kg. The proposed paper shows the process of using a combination of optimization methodologies to create an optimal structure, and the results show that the proposed methodology can improve not only throat angle but also structure weight. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2024.

关键词： Open gap stamping press Taguchi method Throat angle Topology optimization

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Making Sense of the Gendered Realities in science: An Exploration of the Indian Situation

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Social Change 2024年第1期54卷 54-67页

作者： Dhal, Sunita Sharma, Jyoti School of Gender and Development Studies IGNOU Maidan Garhi New Delhi India International Cooperation Division Department of Science and Technology Ministry of Science and Technology New Delhi India

The field of ‘women in science’ in India is evolving with policies that could support ending gender discrimination in the practice and culture of science. Gender inclusivity in science is a complex phenomenon, and it differs in forms and scale across institutions. This complexity has invoked feminist scholars, governments, and organisations to critically engage with issues of gender inequities in science. This article, based on a sample study, seeks to understand the idea of gender inclusivity in science, and the discrimination and marginalisation women scientists face, while exploring how they negotiate institutional spaces and address specific and unique challenges in their everyday reality. © 2024 CSD.

关键词： Gender inclusivity gender-enabling environment leadership women in science

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A new local resonance metamaterial for flat and cylindrical structures depended on elastic chiral spiral beams

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science China(Technological sciences) 2024年第11期67卷 3597-3611页

作者： LIU Jing ZENG Tan NI HengTai HOU YingYing PAN Guang School of Marine Science and Technology Northwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Northwestern Polytechnical UniversityShenzhen 518063China

In practical engineering structures,complex low-frequency vibrations are often ***,most reported elastic metamaterials are designed for high-frequency ranges or rely on substantial additional mass to control low-frequency vibrations,making them difficult to apply in real-world engineering *** address this limitation,we propose a homogeneous locally resonance metamaterial with tunable low-frequency *** design overcomes the challenges associated with conventional local resonators,which are often large and heavy,making them impractical for engineering *** integrating resonator structures composed of elastic chiral spiral beams and mass blocks onto the supporting structure,we achieve lowfrequency vibration control within limited spaces,broadband absorption with gradient parameter units,and vibration control under different *** effectiveness of the proposed design is validated through comparative computational methods,dispersion curve calculations,frequency response simulations,and experimental *** study proposes a novel LRM structure with a full bandgap from 96.9 to 124 *** transmittance is negative in most of the band gap range,which has been verified through numerical and experimental *** approach effectively meets the complex low-frequency vibration control requirements of various curved structures in engineering applications,providing a viable solution for low-frequency vibration control of structures such as flat and cylindrical shells.

关键词： local resonance metamaterial chiral spiral elastic beams flat structures cylindrical structures low-frequency vibrations

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Effect of anion repulsion on iodine transport through water-saturated crushed granite

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Journal of Radioanalytical and Nuclear Chemistry 2023年第4期332卷 935-946页

作者： Tien, Neng-Chuan Lee, Chuan-Pin Nuclear Science and Technology Development Center National Tsing Hua University Hsinchu30013 Taiwan School of Nuclear Science and Engineering East China University of Technology Jiangxi Nanchang330013 China

Transport of nonreactive (tritium, HTO) and anion radionuclides through two columns with different diameters was experimentally and mathematically examined for three inflow rates. One-dimensional advective–dispersive experiments were effectively designed to investigate radionuclide transport through a numerical calibration/validation nonequilibrium model. The two columns were filled with crushed granite, and transport of HTO and two iodine species—iodate (IO3−) and iodide (I−)—through them was studied to obtain breakthrough curves for a water-saturated condition. The significance of I− was found in the smaller column for an input flow rate of 5 mL/min. The accelerated transport of I− may have resulted from anion exclusion, and its relatively stronger Coulomb repulsive force was probably because of its smaller hydration radius than IO3−. © 2022, Akadémiai Kiadó, Budapest, Hungary.

关键词： Iodine compounds

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IMPROVING THE LEARNING PROCESS FOR STUDENTS. PERSONALIZING LEARNING THROUGH SOFTWARE APPLICATIONS

UPB Scientific Bulletin, Series C: Electrical Engineering an...

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UPB Scientific Bulletin, Series C: Electrical Engineering and Computer science 2025年第1期2025卷 157-166页

作者： Drăgoi, Marius-Valentin Puiu, Roxana-Adriana Petrea, Gabriel Burtea, Cătălin Spiridon – Mocioacă, Teodora – Mihaela Puiu, Mihail Suciu, Cosmin Petru Faculty of Industrial Engineering and Robotics National University of Science and Technology POLITEHNICA Bucharest Romania National research and development institute for gas turbines COMOTI Bucharest Romania

Universities often utilize the technique of enhancing educational outcomes by focusing on improving student learning. This technique has seen substantial development via the incorporation of sophisticated software tools, which provide the advantage of not only tackling intricate programming difficulties but also actively assisting students in their educational advancement. These software solutions provide a distinct benefit by facilitating customized learning experiences and enhancing study approaches in a more effective manner. This paper presents an efficient method for comprehending the significance of certain key phrases in a course: to use software that can systematically extract and analyze paragraphs that include those important terms. By prioritizing these essential topics, students may acquire profound perspectives on the subject matter, resulting in a more thorough comprehension. This article introduces a bespoke software program that has been created with the explicit purpose of improving the learning process. The system presented in this article can also deal with Romanian, where this could be a great advantage and a novelty since there is no such advantage of similar systems (to the best of our knowledge). We will showcase the potential influence of this application on student engagement and academic achievement. © 2025, Politechnica University of Bucharest. All rights reserved.

关键词： Contrastive Learning

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GISD: A Generative and Interpretable Framework for Explainable Zero-Shot Stance Detection 24

GISD: A Generative and Interpretable Framework for Explainab...

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4th International Conference on Signal Processing and Communication technology, SPCT 2024

作者： Sun, Ying Ren, Shiqi Peng, Cheng The Institute for Sustainable Development Macau University of Science and Technology China School of Computing University of Electronic Science and Technology of China Zhongshan Institute Guangdong Zhongshan China

ISBN: (纸本)9798400710636

Zero-shot stance detection (ZSSD) seeks to identify the stance of a text in relation to an unseen target. Despite its importance, existing approaches rarely focus on explicitly explaining the reasoning process underlying their predictions or decisions. This paper represents the first attempt to address this gap by generating rationales for predictions in ZSSD, demonstrating that such explanations can effectively uncover the reasoning process. To this end, we propose a novel framework for stance detection called Generative and Interpretable Stance Detection (GISD). A key component of GISD is a three-hop logic elicitation (TH-LE) method, which leverages the chain-of-thought approach to extract if-then reasoning expressions from large language models (LLMs). These if-then expressions are then reformulated alongside the original inputs to create a new training dataset, which is subsequently used to train a generative model. To further enhance the training process, we introduce an iterative-instruction data augmentation (I2DA) method to expand the dataset. Experimental results reveal that the GISD framework significantly surpasses state-of-the-art methods in ZSSD performance. Moreover, manual evaluations confirm that the generated if-then expressions effectively explain the rationale behind the model’s predictions. © 2024 Copyright held by the owner/author(s).

关键词： Zero-shot learning

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