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Boosting cationic and anionic redox activity of Li-rich layered oxide cathodes via Li/Ni disordered regulation

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journal of Energy Chemistry 2025年第1期100卷 533-543页

作者： Zewen Liu Zhen Wu Hao Wang Xudong Zhang Yuanzhen Chen Yongning Liu Shengwu Guo Shenghua Chen Yanli Nan Yan Liu State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University school of Materials Science and Engineering Xi'an University of Architecture and Technology Hefei Advanced Computing Center Operation management Corp Ltd Network Information Center Xi'an Jiaotong University

Lithium-rich layered oxides （LLOs） are increasingly recognized as promising cathode materials for nextgeneration high-energy-density lithium-ion batteries （LIBs）.However,they suffer from voltage decay and low initial Coulombic efficiency （ICE） due to severe structural degradation caused by irreversible O ***,we introduce a three-in-one strategy of increasing Ni and Mn content,along with Li/Ni disordering and TM–O covalency regulation to boost cationic and anionic redox activity simultaneously and thus enhance the electrochemical activity of *** target material,Li1.2Ni0.168Mn0.558Co0.074O2（L1）,exhibits an improved ICE of 87.2%and specific capacity of 293.2 mA h g-1and minimal voltage decay of less than 0.53 m V cycle-1over 300 cycles at 1C,compared to Li1.2Ni0.13Mn0.54Co0.13O2（Ls）(274.4 mA h g-1for initial capacity,73.8%for ICE and voltage decay of 0.84 mV/cycle over 300 cycles at 1C).Theoretical calculations reveal that the density of states （DOS） area near the Fermi energy level for L1 is larger than that of Ls,indicating higher anionic and cationic redox reactivity than ***,L1 exhibits increased O-vacancy formation energy due to higher Li/Ni disordering of 4.76%（quantified by X-ray diffraction Rietveld refinement） and enhanced TM–O covalency,making lattice O release more difficult and thus improving electrochemical *** increased Li/Ni disordering also leads to more Ni2+presence in the Li layer,which acts as a pillar during Li+de-embedding,improving structural *** research not only presents a viable approach to designing low-Co LLOs with enhanced capacity and ICE but also contributes significantly to the fundamental understanding of structural regulation in high-performance LIB cathodes.

关键词： Ice

Potential therapeutic activities and novel delivery systems of chrysin-a nature’s boon

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Food Bioscience 2022年第1期45卷 52-64页

作者： Shreya Chitrakant Adangale Sarika Wairkar Shobhaben Pratapbhai Patel school of Pharmacy&Technology management SVKMs NMIMSV.L.Mehta RoadVile Parle(W)Mumbai.Maharashtra400056India

Flavonoids are a diverse group of phytonutrients that have gained attention as dietary supplements due to their broad spectrum of therapeutic properties and negligible side ***,a 5,7-dihydroxyflavone,has been explored for various pharmacological effects in the last few *** vast biological activities,the use of this polyphenol seems to be compromised due to low solubility,extensive pre-systemic metabolism and thus very poor oral *** present review elucidates various pharmacological actions of chrysin such as cardioprotective,antioxidant,neuroprotective,hepatoprotective,anti-inflammatory,anticancer and antidiabetic activities with the help of reported scientific ***,it focuses on different formulations developed for chrysin to increase its absorption and subsequent *** review thus analyses the beneficial effects of chrysin and gives an overview of possible techniques adopted to increase its systemic bioavailability.

关键词： Chrysin Flavonoids Poor bioavailability Delivery systems Improved therapeutic activity

Integration of α-fairness with DEA based resource allocation model

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journal of Systems Engineering and Electronics 2014年第6期25卷 1027-1036页

作者： Gongbing Bi Hailing Wang jingjing Ding school of management University of Science and Technology of China school of management Hefei University of Technology

How to allocate a resource efficiently and fairly attracts the attention of both researchers and practitioners. Data envelopment analysis（DEA） has been brought to bear on its solution. The existing literature applies Gini coefficient to measure the fairness in the resource allocation process. However, the Gini coefficient is inapplicable in many applications. This paper proposes a novel centralized resource allocation model based on DEA that considers both the efficiency and the fairness. This paper adopts a notion of fairness, namely α-fairness that is well studied in welfare economics and is of practical significance. The new model integratesα-fairness with DEA to support resource allocation decisions. It aids decision makers in making a trade-off between the efficiency and the fairness. An illustrative application is used to validate the proposed approach.

关键词： data envelopment analysis(DEA) resource alloca-tion efficiency fairness α-fairness Gini coefficient

Micro-strain regulation strategy to stabilize perovskite lattice based on the categories and impact of strain on perovskite solar cells

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journal of Energy Chemistry 2025年第1期100卷 578-604页

作者： Caixia Li Wenwu Liu Shiji Da Lingbin Kong Fen Ran State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology school of Materials Science and Engineering Lanzhou University of Technology

Photovoltaic metal halide perovskite solar cells(PSCs) convert light to electricity more efficiently than crystalline silicon cells, and the cost of materials used to make them is lower than that of silicon *** efficiency is not a core issue affecting the application of perovskite solar cells in special *** present, stability is the major technical encounters that hinders its further commercial development. Microstrain in PSCs is currently a significant factor responsible for the device's instability. Strain-induced ion migration is widely believed to accelerate perovskite degradation even when external stimuli are ***, it is imperative to study strain to enhance the stability of PSCs. This paper reviews recent developments to understand strain's origin and effect mechanisms on performance of PSCs, including ion migration,failure behavior, defect formation, and its effect on photoelectric properties, stability, and ***, several well-known strain management strategies are systematically introduced based on the strain effect mechanism and strain engineering on the film, providing more clues for further preparation with increased stability. The manipulation of external physical strain applied from films to entire devices has been extensively studied. Furthermore, recommendations for future research directions and chemical approaches have been provided. It is emphasized that strain engineering plays a crucial role in improving the efficiency and longevity of PSCs. Tensile strain causes rapid degradation, while moderate compressive strain and external strain control could improve properties and stability. Efforts should focus on controlling compressive strain to mitigate residual tensile strain and introducing it in a controlled manner. Future research endeavors may focus on exploring these pathways to improve the efficiency and lifespan of PSCs.

关键词： Halide perovskite solar cells Strain origins Strain effects Strain management

Water quality assessment in Qu River based on fuzzy water pollution index method

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journal of Environmental Sciences 2016年第12期28卷 87-92页

作者： Ranran Li Zhihong Zou Yan An school of Economics and management Beihang University

A fuzzy improved water pollution index was proposed based on fuzzy inference system and water pollution index. This method can not only give a comprehensive water quality rank, but also describe the water quality situation with a quantitative value, which is convenient for the water quality comparison between the same ranks. This proposed method is used to assess water quality of Qu River in Sichuan, China. Data used in the assessment were collected from four monitoring stations from 2006 to 2010. The assessment results show that Qu River water quality presents a downward trend and the overall water quality in 2010 is the worst. The spatial variation indicates that water quality of Nanbashequ section is the pessimal. For the sake of comparison, fuzzy comprehensive evaluation and grey relational method were also employed to assess water quality of Qu River. The comparisons of these three approaches＇ assessment results show that the proposed method is reliable.

关键词： Water quality assessmentFuzzy inferenceWater pollution indexFuzzy comprehensive evaluation

Forecasting of dissolved oxygen in the Guanting reservoir using an optimized NGBM(1,1) model

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journal of Environmental Sciences 2015年第3期27卷 158-164页

作者： Yan An Zhihong Zou Yanfei Zhao school of Economics and management Beihang University

An optimized nonlinear grey Bernoulli model was proposed by using a particle swarm optimization algorithm to solve the parameter optimization problem. In addition, each item in the first-order accumulated generating sequence was set in turn as an initial condition to determine which alternative would yield the highest forecasting accuracy. To test the forecasting performance, the optimized models with different initial conditions were then used to simulate dissolved oxygen concentrations in the Guantlng reservoir inlet and outlet （China）. The empirical results show that the optimized model can remarkably improve forecasting accuracy, and the particle swarm optimization technique is a good tool to solve parameter optimization problems. What＇s more, the optimized model with an initial condition that performs well in in-sample simulation may not do as well as in out-of-sample forecasting.

关键词： Water quality forecasting Dissolved oxygen Nonlinear grey Bernoulli model Particle swarm optimization Initial condition

On the Optimality of Kounias-Sotirakglou Bounds

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journal of Donghua University(English Edition) 2007年第1期24卷 133-136页

作者：李寿德田增瑞顾孟迪 management school Shanghai JiaoTong University management school Donghua University management school Shanghai JiaoTong University

Bonferroni inequalities are significant in application for optimal allocation in tradable emission and other scary resources. Kounias and Sotirakglou improved Bonferroni inequalities, they give the lower and upper bounds for Bonferroni inequalities in the form of P（Ui=1^nAi）,but they did not discuss the optimal of lower and upper bounds for P（Ui=1^nAi）.In this paper, we give the method to obtain the optimum lower and upper bounds for Bonferroai inequalities in the form of ∑i=1^m（-1）^i＋1 aiSi for P（Ui=1^nAi）under the condition tha Q（r）≥（≤）0,The optimality of Kounias Sotirakglou bounds is also studied.

关键词： Bon f erroni inequalities Kounias-Sotirakglou bounds Linear programming.

COORDINATING PRICING AND INVENTORY DECISIONS IN A BOUNDED PRODUCTION SYSTEM WITH UNCERTAIN YIELD

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journal of Systems Science and Systems Engineering 2010年第4期19卷 481-495页

作者： juliang ZHANG Yongjian LI Minghui LAI Department of Logistics management School of Economics and Management Beijing Jiaotong University Business school Nankai University Tianjin 300071 China

Most inventory researches assume that production level can fluctuate arbitrarily. However, large fluctuation of the production level in many firms may be much costly. This paper addresses the coordinating pricing and inventory control problem in a bounded production system with uncertain yield, in which the production level is constrained between a maximum and minimum level in each period and the price can be adjusted dynamically. We show that the optimal policy is the interval base-stock-list-price policy. Also, we study the impact of the production bounds and uncertainty of the yield on the production system. Numerical experiments are also performed to study the impact of parameters on the system.

关键词： Production system dynamic pricing inventory control uncertain yield

Capacitated Dynamic Facility Location Problem Based on Tabu Search Algorithm

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journal of Donghua University(English Edition) 2007年第5期24卷 677-681页

作者：匡奕军诸克军 school of management Fudan University school of management China University of Geosciences

Facility location problem is a kind of NP-Hard combinational *** ever-changing demand sites,demand quantity and releasing cost,we formulate a model combining tabu search and FCM(fuzzy clustering method) to solve the c... 详细信息

关键词： tabu search method facility location releasing cost