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Development of Fenghuang Dancong Tea and Chestnut Sauce

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Asian Agricultural Research 2024年第6期16卷 41-44页

作者： Wanchan QIU Peidan LAI Ziqi PENG Yanbin WU Heng PENG School of Geography and Tourism·School of Teochew Cuisine Hanshan Normal UniversityChaozhou 521041China School of Chemical and Environmental Engineering Hanshan Normal UniversityChaozhou 521041China School of History and Culture Hanshan Normal UniversityChaozhou 521041China

To produce Fenghuang Dancong tea and chestnut sauce that is more in line with people s health needs and has better flavor,the dosage of tea,tea powder,white sugar and milk was analyzed,and the optimal formula of Fenghuang Dancong tea and chestnut sauce was studied through a single factor experiment and orthogonal *** results showed that the best formula of Fenghuang Dancong tea and chestnut sauce was composed of 4.5 g of tea,1.5 g of tea powder,60 g of milk and 5 g of white *** Fenghuang Dancong tea and chestnut sauce made under these conditions was light brown,and had suitable viscosity,delicate and rich *** had the fragrance of Fenghuang Dancong tea and the sweet aroma of chestnuts.

关键词： Fenghuang Dancong tea Chestnuts Sauce Formula optimization Sensory evaluation

Monitoring the Status of Multi-Wave Omicron Variant Outbreaks-71 Countries,2021–2023

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China CDC weekly 2024年第41期6卷 1054-1058页

作者： Chuanqing Xu Lianjiao Dai Songbai Guo Xiaoyu Zhao Xiaoling Liu School of Science Beijing University of Civil Engineering and ArchitectureBeijingChina School of Mathematics Shandong UniversityJinan CityShandong ProvinceChina hanshan normal university Chaozhou CityGuangdong ProvinceChina.

What is already known about this topic?Analyzing the characteristics of epidemic development after the emergence of the severe acute respiratory syndrome virus 2 Omicron variants with its subvariants and the impact of income level inequalities on the coronavirus disease 2019(COVID-19)case-fatality ratio helps to better understand the spread of novel coronavirus *** is added by this report?The median time interval between the first and second waves of Omicron sub-variants was 70 days(interquartile spacing:43.75–91),and between the second and third waves was 87.5 days(interquartile spacing:49–119),which obeyed a lognormal *** case-fatality ratio of the first wave was significantly higher than that of the second and third *** the initial epidemic period,there was no significant geographic differences in the case-fatality ratio of the first wave,while the case-fatality ratio in countries with high income levels was significantly lower than in countries with other income *** are the implications for public health practice?We still need to pay attention to the COVID-19 pandemic,as inequalities in income levels have an impact on the case-fatality ratio during the early stages of Omicron *** most countries,strains of the virus are likely to move from low to high population prevalence after 2–4 months.

关键词： spacing inequalities wave

Exploring Motor Imagery EEG: Enhanced EEG Microstate Analysis with GMD-Driven Density Canopy Method

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Computers, Materials & Continua 2024年第6期79卷 4659-4681页

作者： Xin Xiong Jing Zhang Sanli Yi Chunwu Wang Ruixiang Liu Jianfeng He Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming650500China College of Physics and Electronic Engineering Hanshan Normal UniversityChaozhou521041China Department of Clinical Psychology Second People’s Hospital of YunnanKunming650021China

The analysis of microstates in EEG signals is a crucial technique for understanding the spatiotemporal dynamics of brain electrical *** methods such as Atomic Agglomerative Hierarchical Clustering(AAHC),K-means clustering,Principal Component Analysis(PCA),and Independent Component Analysis(ICA)are limited by a fixed number of microstate maps and insufficient capability in cross-task feature *** these limitations,this study introduces a Global Map Dissimilarity(GMD)-driven density canopy K-means clustering *** innovative approach autonomously determines the optimal number of EEG microstate topographies and employs Gaussian kernel density estimation alongside the GMD index for dynamic modeling of EEG *** this advanced algorithm,the study analyzes the Motor Imagery(MI)dataset from the GigaScience database,*** findings reveal six distinct microstates during actual right-hand movement and five microstates across other task conditions,with microstate C showing superior performance in all task *** imagined movement,microstate A was significantly *** with existing algorithms indicates a significant improvement in clustering performance by the refined method,with an average Calinski-Harabasz Index(CHI)of 35517.29 and a Davis-Bouldin Index(DBI)average of ***,an information-theoretical analysis of the microstate sequences suggests that imagined movement exhibits higher complexity and disorder than actual *** utilizing the extracted microstate sequence parameters as features,the improved algorithm achieved a classification accuracy of 98.41%in EEG signal categorization for motor imagery.A performance of 78.183%accuracy was achieved in a four-class motor imagery task on the BCI-IV-2a *** results demonstrate the potential of the advanced algorithm in microstate analysis,offering a more effective tool for a deeper understanding of the spatiotemporal features of EE

关键词： EEG microstate motor imagery K-means clustering algorithm gaus sian kernel function shannon entropy Lempel-Ziv complexity

Exploration of Curriculum Reform in the Context of Digital Empowerment:Taking the“Class Management”Course in the Primary Education Major of Higher Vocational normal School as an Example

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Journal of Contemporary Educational Research 2024年第2期8卷 123-130页

作者： Meiping Huang Chaozhou Teachers’College of hanshan normal university Chaozhou 521000Guangdong ProvinceChina

In the era of digital empowerment,the digital reform of higher vocational courses has become an inevitable *** explore professional curriculum reform,this study takes the“Class Management”course in the primary education major of higher vocational teachers as the research object,analyzes the importance of digital empowerment to curriculum reform,and discusses the teaching of the“Class Management”course new model and content reform *** technology empowering traditional courses is a new trend,which is both an opportunity and a *** study aims to explore the application of digital technology in courses and provide certain guidelines for curriculum reform in the field of education.

关键词： Digital empowerment Curriculum reform Innovative exploration

Dealing with the Data Imbalance Problem in Pulsar Candidate Sifting Based on Feature Selection

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Research in Astronomy and Astrophysics 2024年第2期24卷 125-137页

作者： Haitao Lin Xiangru Li School of Mathematics and Statistics Hanshan Normal UniversityChaozhou 521000China School of Computer Science South China Normal UniversityGuangzhou 510631China

Pulsar detection has become an active research topic in radio astronomy *** of the essential procedures for pulsar detection is pulsar candidate sifting(PCS),a procedure for identifying potential pulsar signals in a ***,pulsar candidates are always class-imbalanced,as most candidates are non-pulsars such as RFI and only a tiny part of them are from real *** imbalance can greatly affect the performance of machine learning(ML)models,resulting in a heavy cost as some real pulsars are *** deal with the problem,techniques of choosing relevant features to discriminate pulsars from non-pulsars are focused on,which is known as feature *** selection is a process of selecting a subset of the most relevant features from a feature *** distinguishing features between pulsars and non-pulsars can significantly improve the performance of the classifier even if the data are highly *** this work,an algorithm for feature selection called the K-fold Relief-Greedy(KFRG)algorithm is *** is a two-stage *** the first stage,it filters out some irrelevant features according to their K-fold Relief scores,while in the second stage,it removes the redundant features and selects the most relevant features by a forward greedy search *** on the data set of the High Time Resolution Universe survey verified that ML models based on KFRG are capable of PCS,correctly separating pulsars from non-pulsars even if the candidates are highly class-imbalanced.

关键词： methods data analysis-(stars:)pulsars general-methods statistical

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Event-triggered adaptive output feedback control for hyperbolic PDEs: swapping-based design

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Science China(Information Sciences) 2024年第5期67卷 327-328页

作者： Chunting JI Zhengqiang ZHANG Xue-Jun XIE School of Engineering Qufu Normal University Institute of Automation Qufu Normal University

Partial differential equations(PDEs) characterize transport phenomena and fluid flow, and common cases include heat exchangers and road traffic [1]. Recently, scholars have become enthusiastic about event-triggered control(ETC) of hyperbolic PDEs, primarily because it can help conserve computing and communication resources. For example,Ref. [2] presented an output feedback ETC scheme for 2 × 2hyperbolic PDEs.

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Low-Strain and High-Energy KVPO4F Cathode with Multifunctional Stabilizer for Advanced Potassium-Ion Batteries

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Energy & Environmental Materials 2024年第5期7卷 144-153页

作者： Yongli Heng Zhenyi Gu Jinzhi Guo Haojie Liang Yan Liu Wei Guo Xinxin Zhao Xiaotong Wang Xinglong Wu MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal University Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Department of Chemistry Northeast Normal University

KVPO4F with excellent structural stability and high operating voltage has been identified as a promising cathode for potassium-ion batteries （PIBs）,but limits in sluggish ion transport and severe volume change cause insufficient potassium storage ***,a high-energy and low-strain KVPO4F composite cathode assisted by multifunctional K2C4O4electrode stabilizer is exquisitely *** electrochemical investigations demonstrate that this composite cathode can deliver a remarkable energy density up to 530 Wh kg-1with 142.7 mAh g-1of reversible capacity at25 mA g-1,outstanding rate capability of 70.6 mAh g-1at 1000 mA g-1,and decent cycling ***,slight volume change （-5%） and increased interfacial stability with thin and even cathode-electrolyte interphase can be observed through in situ and ex situ characterizations,which are attributed to the synergistic effect from in situ potassium compensation and carbon deposition through self-sacrificing K2C4O4additive.

关键词： high energy density K2C4O4 KVPO4F composite cathode low strain potassium-ion batteries

Small-sized Ni-Co/Mo_(2)C/Co_(6)Mo_(6)C_(2)@C for efficient alkaline and acidic hydrogen evolution reaction by an anchoring calcination strategy

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Frontiers of Chemical Science and Engineering 2024年第5期18卷 95-103页

作者： Jianxia Gu Ying Zhu Haiyan Zheng Chunyi Sun Zhongmin Su Department of Chemistry Xinzhou Normal UniversityXinzhou 034000China School of Chemistry Northeast Normal UniversityChangchun 130024China

A novel,cheap and highly efficient Ni-Co/Mo_(2)C/Co_(6)Mo_(6)C_(2)@C nanocomposite has been successfully constructed through simple one-step carbonization method in a nitrogen *** in the precursor can effectively anchor molybdenum-based Keggin-type polyoxometallate and NiCo-layered double hydroxide through electrostatic and coordination interactions,which avoids the aggregation of catalyst particles during the pyrolysis *** optimization,the obtained Ni-Co/Mo_(2)C/Co_(6)Mo_(6)C_(2)@C possesses small size(3-8 nm),large specific surface area and hierarchical pore *** importantly,Ni-Co/Mo_(2)C/Co_(6)Mo_(6)C_(2)@C presents remarkable hydrogen evolution reaction activity with low overpotentials in 0.5 mol·L^(-1)H_(2)SO_(4)(102.3 mV)and 1 mol·L^(-1)KOH(95 mV)to afford the current density of 10 mA·cm^(-2),as well as small Tafel slopes of 82.49 and 99.92 mV·dec^(-1),***,this catalyst also shows outstanding stability for 12 h without a significant change in current *** excellent catalytic performance of Ni-Co/Mo_(2)C/Co_(6)Mo_(6)C_(2)@C can put down to the synergistic effect between multiple components and the small size of the *** work provides unique insights into the preparation of efficient transition metal-based catalysts for HER.

关键词： polyoxometallates layered double hydroxide transition metal-based electrocatalysts hydrogen evolution reaction

Body size induced changes in metabolic carbon of soil nematodes under N deposition and precipitation regime change in a temperate grassland

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Ecological Processes 2024年第1期13卷 120-131页

作者： Shuyan Cui Xiaomei Mo Guo Zheng College of Life Science Shenyang Normal University

Background Global climate change has resulted in precipitation regimes exhibiting an increasing trend in rainfall intensity but a reduction in its frequency. Nitrogen(N) deposition is a crucial component of the global N cycling. Nematode body size is a trait that responds to climate change and is used as a standard trait-based indicator in soil community analysis. Variations in body size influence metabolic carbon(C). We examined the ways by which body size and metabolic C of nematodes respond to changing precipitation regimes and how N deposition regulates these responses by an 8-year manipulative *** Nematode body size was indicated by the community-weighted mean(CWM) mass. We quantified C metabolism components of soil nematodes including production C, respiration C, and corresponding C use efficiency(CUE) under different precipitation intensities and N addition in a semi-arid steppe on the Mongolian Plateau. The Mantel test was used to determine the correlations between CWM, CUE and environmental factors. The partial least squares path modeling(PLS-PM) was conducted to quantify direct or indirect contributions among latent *** We found that heavy precipitation intensity increased the CWM mass of total nematodes and omnivorespredators without N addition. N addition decreased CWM mass of bacterivores across all the precipitation intensity treatments. Stronger precipitation intensities might be favorable for nematode production and respiration C. Variations in the nematode CWM mass drove the CUE to change with N *** Our findings provide new insights into the mechanisms underlying nematode body size and C metabolism, and highlight that explorative studies, such as manipulative experiments, are needed to identify traits underlying size-related effects and to investigate how they affect CUE of nematodes. These efforts may increase our understanding of how changes in precipitation regimes and N deposition may alter soil nema

关键词： Community-weighted mean Metabolic footprint Nitrogen addition Precipitation intensity