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SSrN 2024年

作者： Fang, Yin-Xin Lin, Yu-Fei Xu, Zhen-Liang Pandaya, dibakar Xu, Sun-Jie State Key Laboratory of Chemical Engineering Membrane Science and Engineering R&D Lab Chemical Engineering Research Center School of Chemical Engineering East China University of Science and Technology 130 Meilong Road Shanghai200237 China

Ion separation is essential for resource recycle, wastewater treatment, and lithium resource extraction. Thin film composite (TFC) nanofiltration membranes have recently been applied in the mono/divalent ions separation. However, the TFC membranes fabricated between polyethyleneimine (PEI) and trimesoyl chloride (TMC) usually show a small water permeance. Herein, piperazine (PIP) is added in the PEI aqueous phase solution to fabricate a polyamide (PA) layer for the enhancement of water permeance. Meanwhile, the diffusion speed of PIP to the two-phase interface is slowed down by the hydrogen bond effect between PIP and MPdTp COFs interlayer, which can weaken the reaction of PIP and TMC and maintain a high ion rejection. The pure water permeance of the obtained PA/Fe-COF/PES membrane is 16.1 L m-2 h-1 bar-1, and the Li+/Mg2+ separation factor is 73.0, which is almost twice as much as the PA/PES under the Li+/Mg2+ mass ratio of 1:20. Besides, other separation performances, including Na+/Mg2+, Cl−/SO42−, Na+/Ca2+, and ten days of long-term testing are also measured. The membrane always keeps satisfactory performance. Therefore, this work raises a new strategy to prepare a high-efficiency mono/divalent ions separation nanofiltration membrane. © 2024, The Authors. All rights reserved.

关键词： Ions

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dynamic gut microbiome-metabolome in cationic bovine serum albumin induced experimental immune-complex glomerulonephritis and effect of losartan and mycophenolate mofetil on microbiota modulation

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Journal of Pharmaceutical Analysis 2024年第4期14卷 562-577页

作者： Wenying Shi Zhaojun Li Weida Wang Xikun Liu Haijie Wu Xiaoguang Chen Xunrong Zhou Sen Zhang State Key Laboratory of Bioactive Substances and Functions of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing100050China State Key Laboratory of Functions and Applications of Medicinal Plants College of PharmacyGuizhou Provincial Engineering Technology Research Center for Chemical Drug R&DGuizhou Medical UniversityGuiyang550004China Department of Medicine Solna Center for Molecular MedicineKarolinska University Hospital and Karolinska InstituteStockholm17176Sweden Department of Pharmacy The Second Affiliated Hospital of Guizhou University of Traditional Chinese MedicineGuiyang550001China

dynamic changes in gut dysbiosis and metabolomic dysregulation are associated with immune-complex glomerulonephritis(ICGN).However,an in-depth study on this topic is currently ***,we report an ICGN model to address this *** was induced via the intravenous injection of cationized bovine serum albumin(c-BSA)into Sprague-dawley(Sd)rats for two weeks,after which mycophenolate mofetil(MMF)and losartan were administered *** and six weeks after ICGN establishment,fecal samples were collected and 16S ribosomal dNA(rdNA)sequencing and untargeted metabolomic were *** microbiota transplantation(FMT)was conducted to determine whether gut normali-zation caused by MMF and losartan contributed to their renal protective effects.A gradual decline in microbial diversity and richness was accompanied by a loss of renal *** 18 genera were found to have significantly different relative abundances between the early and later stages,and Marvinbryantia and Allobaculum were markedly upregulated in both *** metabolomics indicated that the tryptophan metabolism was enhanced in ICGN,characterized by the overproduction of indole and kynurenic acid,while the serotonin pathway was *** of losartan and MMF ameliorated microbial dysbiosis and reduced the accumulation of indoxyl conjugates in *** using feces from animals administered MMF and losartan improved gut dysbiosis by decreasing the Firmicutes/Bacteroidetes(F/B)ratio but did not improve renal *** findings indicate that ICGN induces serous gut dysbiosis,wherein an altered tryptophan metabolism may contribute to its *** and losartan significantly reversed the gut microbial and metabolomic dysbiosis,which partially contributed to their renoprotective effects.

关键词： Immune-complex glomerulonephritis Gut microbiome Metabolomics Fecal microbiota transplant Tryptophan metabolism

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Interfacial Polymerization Modulated by Cofs Interlayer to Fabricate Efficient Mono/divalent Ions Separation Nanofiltration Membrane

SSRN

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SSrN 2024年

Thin-film composite (TFC) membranes have recently been applied in the mono/divalent ions separation, which is essential for resource recycle, wastewater treatment, and lithium resource extraction. However, the TFC membranes fabricated between the polyethyleneimine (PEI) and trimesoyl chloride (TMC) usually show a low water permeance. Herein, piperazine (PIP) is added in the PEI aqueous phase solution to fabricate a polyamide (PA) layer for the enhancement of water permeance. Meanwhile, the diffusion rate of PIP to the two-phase interface is reduced by the hydrogen bond effect between PIP and MPdTp COFs interlayer, which can weaken the reaction of PIP and TMC and maintain a high ion rejection. Pure water permeance of the obtained PA/Fe-COF/PES membrane is 16.1 L m-2 h-1 bar-1, and the Li+/Mg2+ separation factor is 73.0, which is almost twice than the PA/PES under Li+/Mg2+ mass ratio of 1:20. Besides, the membrane also keeps satisfactory performance in Na+/Mg2+, Cl−/SO42−, Na+/Ca2+ separation, and ten days of long-term testing. Therefore, this work raises a new strategy to prepare a high-efficiency mono/divalent ions separation nanofiltration membrane. © 2024, The Authors. All rights reserved.

关键词： Ions

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Creep Life Assessment of In-Service Components by Testing Sub-Standard Sized Samples in Bending: An Example Case of X22CrMoV12-1 Ferritic Steel Used in Steam Turbines

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Transactions of the Indian National Academy of engineering 2023年第3期8卷 449-459页

作者： Singh, dinesh Srinivasan, dheepa Ghosh, Abhijit Jayaram, Vikram Kumar, Praveen Department of Materials Engineering Indian Institute of Science Bangalore India Pratt & Whitney R&D Center Indian Institute of Science Bangalore India Metallurgy Engineering and Materials Science Indian Institute of Technology Indore India

The residual life assessment of a 9–12% Cr tempered martensitic ferritic steel, used in steam turbine blades and rotors, has been carried out using samples extracted from a turbine blade-root in bending, a novel small-scale testing method. Bending creep specimens (2 × 2 × 10 mm3) and miniaturized cylindrical compression creep specimens (5 × 7.6 mm2) were tested at 550 °C by applying effective stresses of 200–500 MPa, which mimics the near operating conditions. The alloy microstructure showed lath boundaries and prior austenitic grain boundaries decorated with M23C6 carbides pinning low-angle boundaries. An excellent equivalence between uniaxial and bending creep was observed in the alloy with a creep stress exponent, n, of 8, thereby suggesting bending creep can be a viable method for creep testing sub-standard-sized specimens extracted from the in-service components.

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Interfacial Polymerization Adjusted by Cofs Layer to Fabricate Efficient Mono/divalent Ions Separation Nanofiltration Membrane

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SSrN 2024年

Ion separation is essential for resource recycle, wastewater treatment, and lithium resource extraction. Thin film composite (TFC) nanofiltration membranes have recently been applied in the mono/divalent ions separation. However, the TFC membranes fabricated between the PEI and TMC usually show a small water permeance. Herein, PIP is added in the PEI aqueous phase solution to fabricate a polyamide layer for the enhancement of water permeance. Meanwhile, the diffusion speed of PIP to the two-phase interface is slowed down by the hydrogen bond between the PIP and MPdTp COFs layer, which can weaken the overreaction phenomenon between PIP and TMC and maintain a high ion rejection. The pure water permeance of the obtained PA/Fe-COF/PES membrane is 16.1 L m-2 h-1 bar-1, and the Li+/Mg2+ separation factor is 73.0, which is almost twice as much as the PA/PES under the Li+/Mg2+ mass ratio of 1:20. Besides, other separation performances, including Na+/Mg2+, Cl-/SO42-, Na+/Ca2+, and ten days of long-term testing are also measured. The membrane always keeps satisfactory performance. Therefore, this work raises a new strategy to prepare a high-efficiency mono/divalent ions separation nanofiltration membrane. © 2024, The Authors. All rights reserved.

关键词： Transition metals

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A decision-dependent Chance-Constrained Planning Model for distribution Networks Under Extreme Weather Events

A Decision-Dependent Chance-Constrained Planning Model for D...

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2023 IEEE PES Innovative Smart Grid Technologies Europe, ISGT EUrOPE 2023

作者： Zhou, Anping Sun, Hongbo Kitamura, Shoichi Nikovski, daniel Dept. of Electrical and Computer Engineering Southern Methodist University DallasTX75205 United States Data Analytics Group Mitsubishi Electric Research Laboratories CambridgeMA02139 United States Advanced Technology R&D Center Mitsubishi Electric Corporation Amagasaki661-8661 Japan

ISBN: (纸本)9798350396782

Extreme weather events have posed tremendous challenges to the operation of distribution networks. In this paper, we propose a decision-dependent chance-constrained model for the optimal planning of diesel generators, renewable distributed generations (rdGs), energy storage systems, and switches under contingency. A promising moment-based ambiguity set that incorporates the information of decision variables is employed to depict the uncertainty arising from rdGs. By leveraging effective approximation methods such as the Bonferroni approximation method to handle the considered joint chance constraints, the proposed model is transformed into a tractable mixed-integer second-order conic programming problem, which means it can easily be implemented. Numerical experiments are put forward on the IEEE 33-bus test system to validate the effectiveness of the developed approach. © 2023 IEEE.

关键词： Chance constraint contingency distribution network distributionally robust optimization renewable energy

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Mixed Eccentricity detection by Identification of Harmonic Order of No-load Line-line Voltages in Multi-three-phase PMSMs

Mixed Eccentricity Detection by Identification of Harmonic O...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Kodai Okazaki Kan Akatsu Kan Yang Advanced Technology R&D Center Mitsubishi Electric Corporation Hyogo Japan Department of Electrical Engineering Yokohama National University Kanagawa Japan

Permanent magnet synchronous motors (PMSMs) have many advantages such as high efficiency. As they are widely utilized for many applications, requirements of less noise and fewer vibrations increase. For a suppression control to the vibration caused by air-gap imbalances, using multi-three-phase PMSMs are suitable method because they can use common three phase inverters. We must detect the air-gap imbalances including static eccentricity and dynamic eccentricity to the suppression control. This paper proposes a method that separately detects static and dynamic eccentricity considering characteristics of the harmonic components of no-load line-line voltages. The method confirms its detection ability by a finite element analysis (FEA) model with eccentricity.

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Building Energy Management Considering Nonlinearity of Electric Equipment with PV-Battery Systems during Power Outage

Building Energy Management Considering Nonlinearity of Elect...

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IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia)

作者： Yuta Kimura Nobuyuki Yamaguchi Fuyuki Sato Takuma Mineyuki Hiroki Kawano Department of Electric Engineering Tokyo University of Science Tokyo Japan Information Technology R&D Center Mitsubishi Electric Corporation Kanagawa Japan

Optimization of energy management in office buildings is essential to get through power outages while continuing business operations. For this purpose, an accurate mathematical model of energy management is necessary. This study proposes a mathematical model for optimal building operation during power outages. The model is formulated using nonlinear functions with the number of workers on each floor and the power consumption of demand facilities as control variables and solved as a mixed integer linear programming method to minimize the damage that occurs during a power outage. Numerical experiments using actual building data verify the validity of the proposed method by comparing optimized human and facility operational plans using the proposed and conventional models.

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Study of Health degree Assessment and Prediction for Axle Counter Equipment in Urban rail Transit 4th

Study of Health Degree Assessment and Prediction for Axle Co...

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4th International Conference on Mechanical design and Simulation, MdS 2024

作者： Yuan, Jianjun Chu, Pengzi Huang, Chunye Shen, Zhe Yu, Yi Maglev Transportation Engineering R&D Center Tongji University Shanghai201804 China Technology Center Shanghai Shentong Metro Group Co. Ltd. Shanghai201103 China Operating Facilities and Equipment Management Department Shanghai Shentong Metro Group Co. Ltd. Shanghai201103 China Telecom and Signaling Branch Shanghai Metro Maintenance Support Co. Ltd. Shanghai200235 China

ISBN: (纸本)9789819778867

Axle counter equipment is a key component in urban rail transit signal systems, and its stability has a great impact on safety and operation efficiency. In this paper, we pay attention to the assessment and prediction methods of the health degree for axle counter equipment in urban rail transit and the corresponding maintenance suggestions. Mainly, two prediction methods, the GM (1, 1) algorithm and the long short-term memory (LSTM) network, are used to compare the prediction effect of health degree for axle counter equipment. Based on enough historical information, the LSTM network can obtain more accurate prediction results with less data input. © The Author(s) 2025.

关键词： Axles

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real-time dynamic Eccentricity detection by Analyzing Harmonic Components of No-load Line-line Voltages in Multi-three-phase PMSMs

Real-time Dynamic Eccentricity Detection by Analyzing Harmon...

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作者： Okazaki, Kodai Yang, Kan Akatsu, Kan Advanced Technology R&D Center Mitsubishi Electric Co. Ltd. 8-1-1 Tsukaguchi-Honmachi Hyogo Amagasaki661-8661 Japan Department of Electrial Engineering Yokohama National University 79-5 Tokiwadai Hodogaya-ku Kanagawa Yokohama240-8501 Japan

Permanent magnet synchronous motors (PMSMs) are widely utilized for many purposes owing to their high efficiency. Such frequent applications require less noise and fewer vibrations. This work focuses on multi-three-phase PMSMs that can independently control the current among winding groups to suppress the vibrations caused by air gap imbalances, which must be detected for suppression control. The representative effects of air gap imbalance include static and dynamic eccentricities. dynamic eccentricity varies the air gap length in time;therefore, the instantaneous detection of the air gap length condition is necessary for suppression control. We propose a method that instantaneously detects dynamic eccentricity using the fundamental and fourth-order harmonic components of no-load line-line voltages, which are easily measurable in practical manufacturing processes. The proposed real-time detection method is applied to a finite element analysis (FEA) model with dynamic eccentricity, and confirm its detection ability is confirmed experimentally. © 2023 The Institute of Electrical Engineers of Japan.

关键词： Permanent magnets

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