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A Model Fusion Distributed Kalman Filter for Non-Gaussian measurement Noise

IEEE Internet of Things Journal 2025年第10期12卷 14677-14690页

作者： Mao, Xuemei He, Jiacheng Wang, Gang Peng, Bei Zhang, Kun Gao, Song Chen, Jian The School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu611731 China The School of Information and Communication Engineering University of Electronic Science and Technology of China Chengdu611731 China

Wireless sensor networks (WSNs) represent a critical research domain within the Internet of Things (IoT) technology. The distributed Kalman filter (DKF) has garnered significant attention as an information fusion method for WSNs. However, effectively handling non-Gaussian environments remains a crucial challenge for DKF. This paper proposes a solution by partitioning the noise distribution into multiple Gaussian components, thereby approximating the measurement model with sub-models. We introduce a model fusion distributed Kalman filter (MFDKF) that combines sub-models by assuming independent random processes for the model’s transition probabilities. The expectation maximization (EM) algorithm is employed to estimate the relevant parameters. To address specific requirements in WSNs that demand high consensus or have limited communication, two derivative algorithms, namely consensus MFDKF (C-MFDKF) and simplified MFDKF (S-MFDKF), are proposed based on consensus theory. The convergence of MFDKF and its derivative algorithms is analyzed. A series of simulations demonstrate the effectiveness of MFDKF and its derivative algorithms. © 2014 IEEE.

关键词： Expectation maximization algorithm

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Visible-Light-Induced 4CzIPN-Catalyzed Alkylamination of Alkenes via Cyclobutanone Oxime Esters and Anilines

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JOURNAL OF ORGANIC CHEMISTRY 2025年第17期90卷 5763-5772页

作者： Liu, Jiang-Hong Tian, Ze-Yu Wu, Zhen-Ye Huang, Tian-Le Hai, Li Guo, Li Wu, Yong Yang, Zhongzhen Sichuan Univ Key Lab Drug Targeting & Drug Delivery Syst Educ Minist Chengdu 610041 Sichuan Peoples R China Sichuan Univ Dept Med Chem Sichuan Engn Lab Plant Sourced Drug Chengdu 610041 Sichuan Peoples R China Sichuan Univ Sichuan Res Ctr Drug Precis Ind Technol West China Sch Pharm Chengdu 610041 Sichuan Peoples R China Sichuan Univ West China Hosp Dept Pharm Chengdu 610041 Peoples R China

We disclosed an organophotoredox-catalyzed three-component oxidative radical-polar crossover strategy for constructing 1,2-alkylamination products. Cycloketone oxime derivatives were used as cyanoalkyl radical precursors and anilines were used as the nucleophiles. This facile protocol shows a good reaction yield and broad substrate scope.

关键词： Methyl ester

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Experimental investigation and predictive modeling of dry-out and salt precipitation effects during underground gas storage operations

GAS SCIENCE AND ENGINEERING

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GAS science AND ENGINEERING 2025年 133卷

作者： Qin, Zhengshan He, Yongming Ding, Yangyang Wang, Ning Yao, Zhenjie Wu, Lin Liu, Xianshan Chengdu Univ Technol Sch Energy Chengdu 610000 Sichuan Peoples R China Shaanxi Key Lab Carbon Dioxide Sequestrat & Enhanc Xian 710075 Shaanxi Peoples R China Yanchang Petr Grp Co Ltd Res Inst Xian 710075 Shaanxi Peoples R China

Formation damage poses the greatest threat to underground gas storage (UGS) operations, with permeability reduction being a key cause of injectivity and productivity losses. To better understand the mechanisms behind dry-out and salt precipitation (DSP) and predict the resulting near-wellbore damage, this study experimentally and quantitatively evaluates key factors affecting rock properties before and after salt precipitation. We conducted long-term gas-brine core flooding experiments, obtained salt-contaminated samples, and supplemented them with core permeability-porosity parameter tests, high-pressure mercury intrusion porosimetry (MIP), and scanning electron microscopy (SEM) experiments to better evaluate the salt clogging behavior of the samples. In addition, we discussed the applicability of the key parameter prediction model in modeling the DSP effects, including the water content of natural gas (WCNG), the porosity-permeability clogging model (PPC), and relative permeability (RP) function, providing usage recommendations. Based on our findings, we introduced a model to predict water saturation, salt saturation, and the salt-induced skin factor near the wellbore, particularly after viscous displacement ends, when liquid becomes immobile and evaporation dominates. The results show that salt precipitation has a significant impact on core porosity and permeability. Notably, lower flow rates subtly promote salt precipitation by enhancing the role of evaporation, resulting in greater salt accumulation. In addition, elevated salinity and higher initial water saturation are key contributors to the precipitation process, further exacerbating salt buildup within the reservoir. MIP experiments further confirm the aforementioned impacts. SEM observations reveal NaCl crystals, either clustered or isolated, extensively distributed within the pores and filling the pore spaces from micro to nanometer scale, highlighting their substantial role in altering pore structure and

关键词： Underground gas storage Dry-out Salt precipitation Core flooding SEM Mercury injection Modeling

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Study on Rapid Quantitative Detection of Soil MPs Based on Terahertz Time-Domain Spectroscopy

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ANALYTICAL CHEMISTRY 2025年第5期97卷 2952-2962页

作者： Xu, Lijia Feng, Yanqi Feng, Ao Yang, Yuping Chen, Yanjun Liu, Bo Yang, Ning Ma, Wei He, Yong Wu, Zhijun Wang, Yuchao Zhao, Yongpeng Sichuan Agr Univ Coll Mech & Elect Engn Yaan 625000 Peoples R China Sichuan Agr Univ Coll Agron Chengdu 610000 Peoples R China Sichuan Acad Agr Machinery Sci Chengdu 610000 Peoples R China Jiangsu Univ Sch Elect & Informat Engn Zhenjiang 212000 Peoples R China Chinese Acad Agr Sci Inst Urban Agr Chengdu 610000 Peoples R China Zhejiang Univ Coll Biosyst Engn & Food Sci Hangzhou 310000 Peoples R China

The presence of microplastics (MPs) in agricultural soils substantially affects the growth, reproduction, feeding, survival, and immunity levels of soil biota. Therefore, it is crucial to investigate fast, effective, and accurate techniques for the detection of soil MPs. This work explores the integration of terahertz time-domain spectroscopy (THz-TDS) techniques with machine learning algorithms to develop a method for the classification and detection of MPs. First, THz spectral image data were preprocessed using moving average (MA). Subsequently, three classification models were developed, including random forest (RF), linear discriminant analysis, and support vector machine (SVM). Notably, the SVM model had an F1 score of 0.9817, demonstrating its ability to rapidly classify MPs in soil samples. Three regression models, namely, principal component regression (PCR), RF, and least squares support vector machine (LSSVM), were developed for the detection of three MPs polymers in agricultural soils. Six feature extraction methods were used to extract the relevant parts of the data containing key information. The results of the study showed that the regression accuracies of PCR, RF, and LSSVM were greater than 83%. Among them, the RF had the highest overall regression accuracy. Notably, PE-UVE-RF had the best performance with R c 2, R p 2, root mean square error of calibration, and root mean square error of prediction values of 0.9974, 0.9916, 0.1595, and 0.2680, respectively. Furthermore, this model gets a better performance by hypothesis testing and predicting real samples.

关键词： Terahertz spectroscopy

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Synergetic Interface and Bulk Defects Modification with Identical Organic Molecule for Efficient Inverted Perovskite Solar Cells

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ACS APPLIED MATERIALS & INTERFACES 2025年第4期17卷 6403-6413页

作者： Yang, Junbo Ma, Zhu You, Wei Chen, Yi Du, Zhuowei Zheng, Shenshen Yang, Qiang Du, Hao Zhang, Qian Li, Yixian Gou, Fuchun Chen, Bo Lv, Zhuo Liu, Kai Yu, Hong Xiang, Yan Huang, Cheng Yu, Jian Zhang, Fengying Zhang, Wenfeng Sun, Kuan Ding, Liming Southwest Petr Univ SWPU Sch New Energy & Mat Chengdu 610500 Peoples R China Tianfu Yongxing Lab Chengdu 610213 Peoples R China Chongqing Univ Sch Energy & Power Engn Key Lab Low Grade Energy Utilizat Technol & Syst MoE Chongqing 400044 Peoples R China Chinese Acad Sci Natl Ctr Nanosci & Technol Key Lab Nanosyst & Hierarch Fabricat Ctr Excellence Nanosci Beijing 100190 Peoples R China

Recent progress in inverted perovskite solar cells (IPSCs) mainly focused on NiO x modification and perovskite (PVK) regulation to enhance efficiency and stability. However, most works address only monofunctional modifications, and identical molecules with the ability to simultaneously optimize NiO x interface and perovskite bulk phase have been rarely reported. This work proposes a dual modification approach using 4-amino-3,5-dichlorobenzotrifluoride (DCTM) to optimize both NiO x upper interfaces and reduction of bulk defects in perovskite. Amino group in DCTM increases the Ni3+/Ni2+ ratio in NiO x , thereby increasing the conductivity and optimizing the energy alignment. Additionally, DCTM fills Pb2+ and I- vacancies in perovskite, which improves the vertical orientation of perovskite grains and subsequently reduces nonradiative recombination, thereby achieving the increased carrier lifetime. PVK modified by DCTM exhibits enhanced energy level alignment with the electron transport layer, while femtosecond transient absorption (TA) spectroscopy confirms that DCTM facilitates efficient carrier transport, leading to high-performance IPSCs. The optimized IPSCs achieve a maximum efficiency of 22.8% with a reduced hysteresis (0.7%). Moreover, the unencapsulated device preserves over 80% of its initial power conversion efficiency (PCE) after 1000 h stored in air at 30% relative humidity. This dual modification strategy of monomolecular offers a straightforward solution for interface optimization and provides new insights into selecting aniline-derived molecules for high-performance IPSCs.

关键词： inverted perovskite solar cells DCTM NiO x synergetic modification bulk defects

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Mechanism of N6-Methyladenosine Modification in the Pathogenesis of Depression

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MOLECULAR NEUROBIOLOGY 2025年第5期62卷 5484-5500页

作者： Xian, Zhuohang Tian, Liangjing Yao, Zhixuan Cao, Lei Jia, Zhilin Li, Gangqin Sichuan Univ West China Sch Basic Med Sci & Forens Med Dept Immunol Chengdu 610041 Sichuan Peoples R China Sichuan Univ West China Sch Basic Med Sci & Forens Med Dept Forens Psychiat Chengdu 610041 Sichuan Peoples R China

N6-methyladenosine (m6A) is one of the most common post-transcriptional RNA modifications, which plays a critical role in various bioprocesses such as immunological processes, stress response, cell self-renewal, and proliferation. The abnormal expression of m6A-related proteins may occur in the central nervous system, affecting neurogenesis, synapse formation, brain development, learning and memory, etc. Accumulating evidence is emerging that dysregulation of m6A contributes to the initiation and progression of psychiatric disorders including depression. Until now, the specific pathogenesis of depression has not been comprehensively clarified, and further investigations are warranted. Stress, inflammation, neurogenesis, and synaptic plasticity have been implicated as possible pathophysiological mechanisms underlying depression, in which m6A is extensively involved. Considering the extensive connections between depression and neurofunction and the critical role of m6A in regulating neurological function, it has been increasingly proposed that m6A may have an important role in the pathogenesis of depression;however, the results and the specific molecular mechanisms of how m6A methylation is involved in major depressive disorder (MDD) were varied and not fully understood. In this review, we describe the underlying molecular mechanisms between m6A and depression from several aspects including inflammation, stress, neuroplasticity including neurogenesis, and brain structure, which contain the interactions of m6A with cytokines, the HPA axis, BDNF, and other biological molecules or mechanisms in detail. Finally, we summarized the perspectives for the improved understanding of the pathogenesis of depression and the development of more effective treatment approaches for this disorder.

关键词： Depression N-6-methyladenosine modification Neuroinflammation HPA axis Neuroplasticity

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A Visible Light-Responsive, Fast Room-Temperature Self- Healing, Mechanically Robust, Antibacterial Waterborne Polyurethane Based on Triple Dynamic Bonds

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ACS APPLIED MATERIALS & INTERFACES 2025年第13期17卷 20307-20323页

作者： Li, Yupeng Jin, Yong Chen, Haonan Zhou, Rong Mei, Jiangyang Mao, Zhexian Sichuan Univ Natl Engn Res Ctr Clean Technol Leather Ind Chengdu 610065 Peoples R China Sichuan Univ Key Lab Leather Chem & Engn Minist Educ Chengdu 610065 Peoples R China

Despite the recent rapid advancements in room-temperature self-healing waterborne polyurethanes, imparting fast self-healing ability while concurrently maintaining robust mechanical performance of waterborne polyurethanes remains a formidable challenge. Herein, we propose a molecular structure design strategy for developing visible light-responsive, room-temperature self-healing, and antibacterial waterborne polyurethane (DMZWPU) containing triple dynamic bonds of diselenide bonds, multiple hydrogen bonds, and Zn(II)-carboxylate coordination bonds. This innovative approach effectively balances the tensile stress, fracture toughness, and self-healing ability of the material. Thanks to the synergy of the three dynamic bonds, the resulting DMZWPU film demonstrates a tensile stress of 40.32 MPa and a fracture toughness of 119.29 MJ/m(3), respectively. Furthermore, based on the dynamic characteristics of three dynamic bonds and the dual induction of trace ethanol and visible light, the damaged DMZWPU film can recover more than 85% of the tensile stress at room temperature within 2 h. These performances outperform those of most of the currently reported room-temperature self-healable polymers (healing efficiency >80%). Due to the combined action of selenium and zinc ions, the DWZWPU film exhibits excellent antibacterial properties (sterilization rate of 100% in 24 h). Finally, the DMZWPU emulsion is effectively applied for leather finishing processes, and the results show that the DMZWPU coating exhibits excellent folding resistance, wear resistance, and room-temperature self-healing function, as well as enhanced water resistance and dry friction resistance. In summary, this study provides a novel perspective for the development of waterborne polyurethane with high mechanical performances and rapid self-healable ability at room temperature.

关键词： Waterborne polyurethane Fast room-temperature self-healing Mechanical robustness Visible light-responsive Antibacterial

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Application of tuff powder in ultra-high performance concrete hardened in extreme plateau condition

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CONSTRUCTION AND BUILDING MATERIALS 2025年 474卷

作者： Li, Bixiong Li, Lianghui He, Yongsheng He, Baoguo Guo, Dong Nong, Qingshun Li, Tianqi Wang, Zhiwen Lyu, Xin Zhang, Zhibo Sichuan Univ Coll Architecture & Environm Chengdu 610065 Peoples R China Sichuan Univ State Key Lab Intelligent Construct & Hlth Operat Chengdu 610065 Peoples R China Huadian Xizang Energy Co Ltd Bayu Branch Chengdu 610065 Peoples R China

The localization of raw materials is an effective method to reduce costs and protect the environment. Tuff is abundant in Tibet, China;however, when utilized as a supplementary cementing material (SCM), tuff powder can significantly reduce the mechanical properties of concrete. Furthermore, there is insufficient research concerning the impacts of curing air pressure on concrete containing tuff powder, which constrains its application in plateau areas. This study investigates the use of Tibetan tuff powder as a SCM to develop Ultra-High Performance Concrete incorporating tuff powder (TP-UHPC) and explores the effects mechanism of low-pressure curing on its mechanical properties. The findings demonstrate that incorporating tuff powder in UHPC yields favorable outcomes, with fine-grained tuff powder exhibiting enhanced mechanical properties and improved performance under low-pressure curing conditions, with an optimal replacement level of 20 %. Although reducing curing air pressure negatively affects the mechanical performance of TP-UHPC, this adverse effect diminishes with increasing curing age, unlike traditional concrete. Additionally, low curing air pressure increases the total porosity, average and maximum pore diameter of TP-UHPC. Pore volume increases within the 10 nm to 200 nm range are identified as a key determinant of the deterioration in mechanical properties. This research supports the utilization of tuff powder in cement-based materials in Tibet.

关键词： Tuff powder UHPC Mechanical properties Low curing air pressure Pore structure

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Regenerative properties of bone marrow mesenchymal stem cell derived exosomes in rotator cuff tears

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JOURNAL OF TRANSLATIONAL MEDICINE 2025年第1期23卷 1-19页

作者： Chen, Junjie Wang, Zihe Yi, Ming Yang, Yi Tian, Mengzhao Liu, Yinqi Wang, Guoyou Shen, Huarui Southwest Med Univ Affiliated Tradit Chinese Med Hosp Dept Joint Surg Luzhou Sichuan Peoples R China Southwest Univ Southwest Univ Hosp Sch Mat & Energy Chongqing Peoples R China

Rotator cuff injury (RCI), characterized by shoulder pain and restricted mobility, represents a subset of tendon-bone insertion injuries (TBI). In the majority of cases, surgical reconstruction of the affected tendons or ligaments is required to address the damage. However, numerous clinical failures have underscored the suboptimal outcomes associated with such procedures. Further investigations have revealed that these failures are largely attributable to delayed healing at the tendon-bone interface, excessive formation of vascularized scar tissue, and inadequate integration of tendon grafts within bone tunnels. As a result, the healing process of rotator cuff injuries faces significant *** marrow-derived mesenchymal stem cell exosomes (BMSC-exos) have emerged as a prominent focus of research within the field of bioengineering, owing to their remarkable potential to regulate cellular proliferation and differentiation, modulate immune responses, and facilitate tissue repair and regeneration following cellular damage. In this review, we explore the anti-inflammatory, angiogenic, anti-scarring, and bone metabolism-modulating effects of BMSC-exos in the context of rotator cuff injury. Additionally, we address the limitations and ongoing challenges within current research, offering insights that could guide the clinical application of BMSC-exos in the treatment of rotator cuff injuries in the future.

关键词： Tendon-bone healing Exosomes Bone marrow mesenchymal stem cells Rotator cuff regenerative Drug delivery Nanocarriers Biomaterials Nanomedicine

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Samarium-Promoted Layered La2NiO4 Perovskite for Hydrogen Production via the Auto-Thermal Reforming of Acetic Acid

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MATERIALS 2025年第7期18卷 1508-1508页

作者： Hu, Xiaomin Huang, Lihong Wang, Ning Beijing Univ Technol Coll Environm Sci & Engn Beijing 100124 Peoples R China Chengdu Univ Technol Dept Chem & Pharmaceut Engn Chengdu 610059 Peoples R China Chengdu Univ Technol State Key Lab Geohazard Prevent & Geoenvironm Prot Chengdu 610059 Peoples R China

The auto-thermal reforming (ATR) of acetic acid is an effective hydrogen production method, but it suffers from catalyst deactivation by coking. Sm-promoted layered La2NiO4 perovskite catalysts were synthesized via the sol-gel method and its catalytic performance in the ATR of HAc was further evaluated. The characterization results demonstrate that the incorporation of Sm into the lattice of La2NiO4 perovskite led to the formation of Ni-La-Sm-O species, inducing crystal defects in the perovskite structure which could promote the gasification of coking precursors. Additionally, Sm regulated the reduction characteristics of La2NiO4, resulting in the formation of highly dispersed nickel nanoparticles upon the hydrogen reduction, which increased the number of active sites available for acetic acid conversion. Consequently, a stable reactivity without obvious coking was obtained over a Ni0.42La0.7Sm0.36O2.01 +/-delta catalyst within the ATR of Hac. The hydrogen yield reached 2.53 mol-H-2/mol-HAc along with the complete conversion of acetic acid.

关键词： acetic acid auto-thermal reforming hydrogen La2NiO4 Sm doping

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