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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 478-507页

作者： cong-hua CHENG School of Mathematics and Statistics Zhaoqing UniversityZhaoqing 526061China

In this paper,we consider a system which has k statistically independent.and identically distributed strength components and each component is constructed by a pair of statistically dependent elements with doubly type-II censored *** elements(X1,Y1),(X2,Y2),…,(Xk,Yk)follow a bivariate Kumaraswamy distribution and each element is exposed to a common random stress t which follows a Kumaraswamy *** system is regarded as operating only if at least s out of k(1≤s≤k)strength variables exceed the random *** multicomponent reliability of the system is given by Rs,k=P(at least s of the(Z1,…,Zk)exceed t)where Zi=min(Xi,Yi),i=1,…,*** Bayes estimates of Rs,k have been developed by using the Markov Chain Monte Carlo methods due to the lack of explicit *** uniformly minimum variance unbiased and exact Bayes estimates of Rs,k are obtained analytically when the common second shape parameter is *** asymptotic confidence interval and the highest probability density credible interval are constructed for Rs,*** reliability estimators are compared by using the estimated risks through Monte Carlo simulations.

关键词： stress-strength model bivariate Kumaraswamy distribution multicomponent reliability doubly type-II censored scheme interval estimation

Gait Recognition Under Different Clothing Conditions Via Deterministic Learning

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IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1530-1532页

作者： Muqing Deng cong Wang School of Automation Guangdong University of TechnologyGuangzhou 510006China School of Control Science and Engineering Shandong UniversityJinan 250100China

Dear Editor,this letter deals with the robustness problem of gait recognition method against maximum number of clothing *** selecting four kinds of time-varying silhouette features,gait dynamics underlying different individuals’gait features is effectively modeled by radial basis function(RBF)neural networks through deterministic *** kind of dynamics information has little sensitivity to the variance between gait patterns under different clothing *** order to eliminate the effect of clothing differences,the training patterns under different clothing conditions further constitute a uniform training dataset,containing all kinds of gait dynamics under different clothing conditions.A rapid recognition scheme is presented on published gait *** experiments demonstrate the efficacy of the proposed method.

关键词： networks neural individual

Navigating Epstein–Barr virus autoimmunity:role of NK cells and t cells in multiple sclerosis

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Signal t.ansduction and targeted therapy 2024年第3期9卷 833-835页

作者： Chu Xie cong Sun Mu-Sheng Zeng State Key Laboratory of Oncology in South China Guangdong Provincial Clinical Research Center for CancerGuangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and TherapySun Yat-sen University Cancer CenterGuangzhouP.R.China

In a recent study published in Cell,Vietzen and colleagues discovered the novel role of natural killer(NK)cells and EBVspecific CD8+t cell response in controlling EBV-inducing autoimmune response and collectively def... 详细信息

关键词： Epstein sclerosis killer

Ferromagnetism and insulating behavior with a logarithmic temperature dependence of resistivity in Pb_(10-x)Cux(PO_(4))_(6)O

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Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 106-111页

作者： Yuhang Zhang cong Liu Xiyu Zhu Hai-Hu Wen Center for Superconducting Physics and Materials National Laboratory of Solid State Microstructures and Department of PhysicsNational Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

Recent claim of discovering above-room-temperature superconductivity(tc≈400 K)at ambient pressure in copper doped apatite Pb10(PO_(4))_(6)O has stimulated world-wide enthusiasm and impulse of motion.A lot of follow-up works have been carried out with controversial *** check whether superconductivity is really present or absent in the material,we need samples which should have a rather pure phase of Pb_(10-x)Cux(PO_(4))_(6)*** we report the characterization results from the Pb_(10-x)Cux(PO_(4))_(6)O with a fraction of about 97 wt.%inferred from the fitting to the X-ray diffraction pattern,if assuming Cu2S as the only *** resistivity measurements show that it is a semiconductor characterized roughly by a ln(1/t)temperature dependence in wide temperature region without trace of *** measurements show that it has a general ferromagnetic signal with a weak superparamagnetic *** grains of the sample show clear interactions with a Nb Fe B *** detected Cu concentration is much lower t.an the expected nominal *** results show the absence of metallicity and superconductivity in Pb_(10-x)Cux(PO_(4))_(6)O at ambient pressure,and suggest the presence of strong correlation effect.

关键词： superconductivity Pb10(PO4)6O ferromagnetic correlation effect

Ceramic-based meta-material absorber with high-temperature stability

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Rare Metals 2024年第9期43卷 4433-4440页

作者： Xing-cong Chen Wei-Jia Luo Run-Ni Zhao Yong-Zheng Wen Ji Zhou State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

With the continuous exploration of uncharted and extreme environments,enhanced temperature robustness of passive devices has become particularly *** this study,a ceramic-based meta-material absorber with exceptional temperature stability is developed using a fusion design approach that combines rare metal-based tungsten bronze structural ceramics and ***,the absorbance of the meta-material array based on Mie resonance exceeds 49.0%in both waveguides and free space,approaching the theoretical *** to impedance analysis,the absorption performance can be distinctly correlated with the dielectric loss(Q_(f)).Notably,the high-temperature robustness is verified to still be effective at 400℃.these advancements in our design allow for the use of monolithic materials in fabricating temperature-stable perfect absorbers,providing greater freedom in the dielectric performance and expanding their potential applications,including in space exploration and 5G millimeter-wave scenarios.

关键词： temperature robustness Meta-material absorber Microwave absorption Rare metal-based ceramics Miniaturization

Analysis on influencing factors of detecting chemical oxygen demand in water by three-dimensional spectroscopy

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Optoelectronics Letters 2024年第1期20卷 42-47页

作者： ZHOU Kunpeng LIU Zhiyang cong Menglong MAN Shanxin Inner Mongolia Autonomous Region Joint Laboratory of Nuclear and Radiation Detection College of Physics and Electronic InformationInner Mongolia Minzu UniversityTongliao 028000China College of Information Engineering Jingzhou UniversityJingzhou 434000China Alxa League Meteorological Bureau Alxa 750300China

this paper focuses on the standard chemical oxygen demand(COD)liquid and studies the impact of pH,nitrite nitrogen,nitrate nitrogen,heavy metals,salinity,and other factors on fluorescence intensity and fluorescence peak positions during the detection of COD in water using fluorescence *** influence mechanisms of different environmental factors on fluorescence spectra are also *** indicate that pH value affects the fluorescence emission wavelength(Em),resulting in a red shift from 1.5 to 7.2,and a blue shift from 7.2 to *** nitrogen can react with organic matter in water to form nitro compounds,leading to a decrease in fluorescence *** has a negligible effect on t1 peak but a relatively large effect on t2 *** metal ion concentration has a significant impact on t2 peak,while t1 peak position shifts with an increase in heavy metal *** study aims to explore the factors that can impact the detection of COD in water using three-dimensional fluorescence spectrometry,providing references to improve accuracy and practicability for COD detection based on three-dimensional fluorescence spectrometry.

关键词： chemical negligible nitrate

tuning the local coordination environment of silver(Ⅰ) coordination networks with counterions for enhanced electrocatalytic CO_(2) reduction

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Science China Chemistry 2024年第5期67卷 1524-1530页

作者： Xiaofeng Cui Xueting Wang cong Fu Bing Liu Mei-Yan Gao tingting Kong Yujie Xiong Anhui Engineering Research Center of Carbon Neutrality The Key Laboratory of Functional Molecular SolidsMinistry of EducationAnhui Laboratory of Molecular-Based MaterialsCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China Department of Chemical Sciences Bernal InstituteUniversity of LimerickLimerick V94 T9PXRepublic of Ireland School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China School of Chemical and Material Engineering Jiangnan UniversityWuxi 214122China

Very recently, the local coordination environment of active sites has been found to strongly influence their performance in electrocatalytic CO_(2) reduction by tuning the intrinsic kinetics of CO_(2) activation and intermediate stabilization. It is imperative to elucidate the mechanism for such an influence towards the rational design of efficient catalysts;however, the complex interactions between the multiple factors involved in the system make it challenging to establish a clear structure–performance relationship. In this work, we chose ion-intercalated silver(I)-based coordination networks(AgCNs) with a well-defined structure as a model platform, which enables us to understand the regulation mechanism of counterions as the counterions are the only tuning factor involved in such a system. We prepared two isostructural Ag CNs with different intercalation ions or counterions of BF_(4)^(-) and ClO_(4)^(-)(named as AgCNs-BF_(4) and AgCNs-ClO_(4)) and found that the former has a more competitive CO_(2) electroreduction performance t.an the latter. AgCNs-BF_(4) achieves the highest Faradaic efficiency for CO_(2) to CO of 87.1% at-1.0 V(vs. RHE) with a higher partial current density, while AgCNs-ClO_(4) exhibits only 77.2% at the same applied *** characterizations and theoretical calculation reveal that the presence of BF_(4)^(-)is more favorable for stabilizing the COOH^(*) intermediate by weakening hydrogen bonds, which accounts for the superior activity of Ag CNs-BF_(4).

关键词： electrocatalytic CO_(2) reduction coordination networks local environment counterions intercalation ions

Optical manipulation of ratio-designable Janus microspheres

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Photonics Research 2024年第6期12卷 1239-1249页

作者： YULU CHEN cong ZHAI XIAOQING GAO HAN WANG ZUZENG LIN XIAOWEI ZHOU CHUNGUANG HU State Key Laboratory of Precision Measuring technology and Instruments Tianjin UniversityTianjin 300072China

Angular optical trapping based on Janus microspheres has been proven to be a novel method to achieve controllable *** contrast to natural birefringent crystals,Janus microspheres are chemically synthesized of two compositions with different refractive ***,their structures can be artificially regulated,which brings excellent potential for fine and multi-degree-of-freedom manipulation in the optical ***,it is a considerable challenge to model the interaction of heterogeneous particles with the optical field,and there has also been no experimental study on the optical manipulation of microspheres with such designable refractive index *** the specific structure affects the kinematic properties of Janus microspheres remains ***,we report systematic research on the optical trapping and rotating of various ratio-designable Janus *** employ an efficient t-matrix method to rapidly calculate the optical force and torque on Janus microspheres to obtain their trapped postures and rotational characteristics in the optical *** have developed a robust microfluidic-based scheme to prepare Janus *** experimental results demonstrate that within a specific ratio range,the rotation radii of microspheres vary linearly and the orientations of microsphere are always aligned with the light polarization *** is of great importance in guiding the design of Janus *** their orientations flip at a particular ratio,all consistent with the *** work provides a reliable theoretical analysis and experimental strategy for studying the interaction of heterogeneous particles with the optical field and further expands the diverse manipulation capabilities of optical tweezers.

关键词： polarization ratio refractive

Cross-level steam load smoothing and optimization in industrial parks using data-driven approaches

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Energy and AI 2024年第2期16卷 69-83页

作者： Xiaojie Lin Xueru Lin Wei Zhong Feiyun cong Yi Zhou Zhejiang Key Laboratory of Clean Energy and Carbon Neutrality Zhejiang UniversityHangzhouChina Shanghai Institute for Advanced Study Zhejiang UniversityShanghaiChina College of Energy Engineering Zhejiang UniversityHangzhouChina Jiaxing Research Institute Zhejiang UniversityJiaxingChina School of Mechanical Engineering Zhejiang UniversityHangzhouChina

this study focuses on the integrated energy production system in industrial parks, addressing the problem of stable load dispatch of equipment under demand fluctuations. A cross-level method for steam load smoothing and optimization is proposed, aiming to achieve stable production and optimal economic performance through three levels of integration: load forecasting, load dispatch, and load regulation. Unlike traditional methods that directly use load forecasting values, heat network elasticity is presented as a buffer between demand and supply. Constraints for minimal changes in equipment load and operational parameters are established for smooth regulation. Industrial cases demonstrate that the load forecasting model has mean absolute percentage errors of 2.44% and 1.68% for medium-pressure and low-pressure steam, respectively, meeting accuracy requirements. the modified supply-side load smoothness is effectively improved by considering heat network elasticity. the method increases boiler efficiency by 1.92%, reducing average coal consumption by 0.92 t/h. Compared to manual operation, the proposed model leads to an average increase of 5.69 MW in power generation and an average reduction of 10.81% in coal-to-electricity ratio. this study verifies the importance of smooth integration across different levels and analyzes the effective response of the proposed method to the uncertainty in load forecasting. the method demonstrates the enormous potential of data-driven methods in achieving safe, economical, and sustainable production in industrial parks.

关键词： Industrial parks Heat network elasticity Load regulation Integrated optimization Load forecasting Production stability

Flurbiprofen microneedle patches for the management of acute postoperative pain

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Nano Research 2024年第8期17卷 7493-7503页

作者： Huaqing Chu Yanyan Zhang Yuan Yang Jiangtao Xue cong Li Wei Zhang Zhou Li Hui Zheng National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China Key Laboratory of Hunan Province for Integrated traditional Chinese and Western Medicine on Prevention and treatment of Cardio-Cerebral Diseases School of Integrated Chinese and Western MedicineHunan University of Chinese MedicineChangsha 410208China School of Life Science Institute of Engineering MedicineBeijing Institute of TechnologyBeijing 100081China Institute of Process Engineering Chinese Academy of SciencesBeijing 100190China

Acute postoperative pain is commonly treated with flurbiprofen(FBP),but conventional delivery methods are *** study prepared a new non-burst release microneedles(MNs)using genipin cross-linked gelatin(cGel).By adding varying amounts of genipin to modulate the crosslinking degree of cGel,the drug release behavior of the drug-loaded MNs in the skin can be *** crosslinking parameters that meet therapeutic requirements are selected,thus providing rapid and longlasting analgesic *** solutions were successfully cross-linked,altering matrix material microstructure,confirmed by scanning electron microscope imaging and fourier t.ansform infrared *** demonstrated increasing mechanical strength with higher *** release rates were rapid initially,then slowed,exhibiting a characteristic of decreased release rates with increasing degrees of *** vivo,FBP/cGel MNs significantly reduced allodynia and hyperalgesia post-surgery,with the greatest effect observed at 2–3 h post-surgery,and can maintain analgesia for up to 6 *** tests confirmed good ***/cGel MNs effectively penetrate the stratum corneum,safely delivering drugs with significant.analgesic effects,excellent mechanical properties,and good biocompatibility,representing a promising strategy for managing acute postoperative pain.

关键词： microneedle postoperative pain flurbiprofen non-steroid anti-inflammatory drug cross-linked gelatin