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Inheritance of the exciton geometric structure from Bloch electrons in two-dimensional layered semiconductors

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Frontiers of physics 2024年第4期19卷 25-35页

作者： Jianju Tang Songlei Wang Hongyi Yu Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing&School of Physics and Astronomy Sun Yat-sen University(Zhuhai Campus)Zhuhai 519082China State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen University(Guangzhou Campus)Guangzhou 510275China

We theoretically studied the exciton geometric structure in layered semiconducting transition metal *** on a three-orbital tight-binding model for Bloch electrons which incorporates their geometric structures,an effective exciton Hamiltonian is constructed and solved perturbatively to reveal the relation between the exciton and its electron/hole *** show that the electron−hole Coulomb interaction gives rise to a non-trivial inheritance of the exciton geometric structure from Bloch electrons,which manifests as a valley-dependent center-of-mass anomalous Hall velocity of the exciton when two external fields are applied on the electron and hole constituents,*** obtained center-of-mass anomalous velocity is found to exhibit a non-trivial dependence on the fields,as well as the wave function and valley index of the *** findings can serve as a general guide for the field-control of the valley-dependent exciton transport,enabling the design of novel quantum optoelectronic and valleytronic devices.

关键词： transition metal dichalcogenides exciton geometric structure Berry curvature van der Waals stacking

A review of hard carbon anodes for rechargeable sodium-ion batteries

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新型炭材料（中英文） 2024年第5期39卷 796-823页

作者： MU Bao-yi CHI Chun-lei YANG Xin-hou HUANGFU Chao QI Bin WANG Guan-wen LI Zhi-yuan SONG Lei WEI Tong FAN Zhuang-jun School of Material science and Engineering China University of Petroleum Huadong-Qingdao CampusQingdao 266580China Shandong Laboratory of Advanced Materials and Green Manufacturing Yantai 264000China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031China

Hard carbons(HCs)are recognized as potential anode materials for sodium-ion batteries(SIBs)because of their low cost,environmental friendliness,and the abundance of their *** presence of graphitic domains,numerous pores,and disordered carbon layers in HCs plays a significant role in determining their sodium storage ability,but these structural features depend on the precursor *** influence of functional groups,including heteroatoms and oxygen-containing groups,and the microstructure of the precursor on the physical and electrochemical properties of the HC produced are evaluated,and the effects of carbonization conditions(carbonization temperature,heating rate and atmosphere)are also discussed.

关键词： Sodium-ion battery Hard carbon Precursor Anode Nanostructure

Effect of Nanostructures Addition and Enhancement of Poly (Vinylidene Difluoride) (PVDF) Energy Harvesting

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Materials sciences and Applications 2024年第7期15卷 228-244页

作者： Omar Peña-Oliveras Brenda Javier-Boodhan Anthony La Santa Juan Gonzalez-Sanchez Division of science Technology and Engineering Universidad Ana G. Mndez Carolina Campus Carolina Puerto Rico Department of Electronics University of Puerto Rico Bayamon Campus Bayamon Puerto Rico

With concerns in energy crisis and global warming, researchers are actively investigating alternative energy renewable solutions. Among the various methods, piezoelectric transduction stands out due to its impressive electromechanical coupling factor and coefficient. As a result, piezoelectric energy harvesting has garnered significant attention from the scientific community. In this study, we explored methods to enhance the piezoelectric properties of polyvinylidene fluoride (PVDF) through two distinct approaches. The first approach involved applying external high voltages at various stages during the mixture reaction. The goal was to determine whether this voltage application could alter or enhance PVDF’s piezoelectric conformation by improving the alignment of polarized dipoles. In the second part of our study, we investigated the effects of incorporating various nanostructures (including Iron Oxide, Magnesium Oxide, and Zinc Oxide) into PVDF. To analyze changes in PVDF’s crystalline structure, we utilized Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD) techniques. Additionally, we measured the electric polarization of samples using a Precision LC Meter and examined the morphology of nanofibers through Scanning Electron Microscopy (SEM).

关键词： Poly (Vinylidene Fluoride) (PVDF) Energy Harvesting Electrospinning Nanoparticles ZnO MgO Fe3O4

GSZ Formula Enhances Sleep Quality:Exploring Its Active Ingredients and Mechanism Using a Network Medicine Approach

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Clinical Complementary Medicine and Pharmacology 2024年第1期4卷 36-43页

作者： Airong Ren Mingxuan Ma Yongyin Liang Yarong Wang Zhengkun Li Yahui Liu Qing Fan Guozhen Cui School of Bioengineering Zhuhai Campus of Zunyi Medical UniversityZhuhai 519000GuangdongChina Basic Medical science Department Zhuhai Campus of Zunyi Medical UniversityZhuhai 519000GuangdongChina

Background:Sleep is essential for maintaining human health,and insomnia is a widespread *** Chinese medicine(TCM)has been used for centuries to treat sleep disorders,with fewer reported side effects compared to conventional ***:This study seeks to investigate the sleep-promoting effects of the GSZ formula,which comprisesγ-aminobutyric acid(GABA),Schisandrae Chinensis Fructus(Wuweizi in Chinese),and Ziziphi Spinosae Semen(Suanzaoren in Chinese).In addition,this study aims to explore the active ingredients and potential mechanisms underlying the sleep-enhancing effects of the ***:The impact of GSZ on sleep was evaluated using two models,the complete sleep model and the sub-threshold sleep *** were randomly divided into five groups and orally administered GSZ solution(0.33 g/kg/day or 0.99 g/kg/day),positive drug diazepam(2.50 mg/kg)or a control solution for 30 ***-sis model was established in mice using pentobarbital *** duration and incidence were measured by recording when the righting reflex of mice disappeared for more than 1 *** and dopamine(DA)levels in mouse brain tissue were measured using ELISA *** ingredients of the GSZ formula were identified using mass spectrometry,and the targets of these ingredients and disease-related genes were retrieved from public databases.A network medicine approach was used to calculate the shortest path between ingredient targets and disease-related *** expression levels of potential proteins,such as Akt,p-Akt,GSK-3β,and p-GSK-3β,were analyzed using Western blotting based on the predicted ***:GSZ significantly prolonged sleep duration and enhanced the sleep rate in mice(P<0.05).Furthermore,it elevated GABA levels and reduced DA levels in the mouse brain(P<0.05).Network medicine analysis suggested that GABA,stearic acid,genistin,and coumestrol may be the most crucial active ingredients for sleep *** blotting analysis

关键词： Sleep quality Ziziphi spinosae semen Schisandrae chinensis fructus γ-aminobutyric acid Network medicine

Germ cell development in teleost gonads

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Aquaculture and Fisheries 2024年第3期9卷 422-436页

作者： Partigya Sharma Shriya Purohit Sachin Kothiyal Indrashis Bhattacharya Department of Zoology HNB Garhwal UniversitySrinagar CampusPauri Garhwal246174India

Among vertebrate species,fishes are considered to be the most developmentally diverse taxa exhibiting remarkable gonadal plasticity with capacity of sex *** determination in teleost fishes is governed via a complex regulatory network involving multiple genetic,environmental(temperature,population density,pH),social interaction/stress *** germ-line originates as Primordial germ cells(PGC)from cleavage blastomeres/endoderm and gets specified by maternal inheritance of Vasa,N anos,Tdrds,Dnd,Dazl etc and subsequently migrates to reach the embryonic gonadal ***-hatching,mitotically active germ cells(Gc)continue to proliferate via two distinct pathways-firstly,stem cell-like mode followed by meiosis-committed cystic *** Japanese rice fish medaka,Oryzias latipes sex gets determined on the chromosomal basis,where XY becomes a male because of testicular Dmy transcription and XX develops as female owing to Gc restricted Foxl 3 *** specific germ-line stem cell systems also have been found in adult *** in teleost fishes,the developmental fate of transplanted Gc do not depend on the sex of the donor rather solely relies upon the sex of the ***,sexually mature piscine gonads remain developmentally plastic showing extensive responsiveness towards sex *** critical regulation of gonadal differentiation is directed by female specific 17β-estradiol(E2)and bio-active male androgen 11-keto-testosretone(11-kT).Various transcription factors(TFs)e.g.-Dmrt1,DAX1,Ad4BP/SF-1,Foxl 2 regulate the bio-conversion rate of testosterone(T)to either E2 or ***,multiple endocrine factors(EFs)e.g.-LH,FSH,E2,11-kT and growth factors(GFs)e.g-AMH,GSDF,IGF-1/3,GDF-9/BMP-15 critically induce Gc differentiation to regulate the gametogenic *** this article we have precisely discussed the endocrine regulation of Gc development during gonadal maturation of teleosts.

关键词： Testis Spermatogenesis Sperm Ovary Oogenesis Egg Gonads

Prediction of bearing capacity of pile foundation using deep learning approaches

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Frontiers of Structural and Civil Engineering 2024年第6期18卷 870-886页

作者： Manish KUMAR Divesh Ranjan KUMAR Jitendra KHATTI Pijush SAMUI Kamaldeep Singh GROVER Department of Civil Engineering SRM Institute of Science and Technology Tiruchirappalli CampusTrichy 621105India Department of Civil Engineering National Institute of Technology PatnaBihar 800005India Department of Civil Engineering Faculty of EngineeringThammasat School of EngineeringThammasat UniversityBangkok10200Thailand Department of Civil Engineering Rajasthan Technical UniversityKota 324010India

The accurate prediction of bearing capacity is crucial in ensuring the structural integrity and safety of pile *** research compares the Deep Neural Networks(DNN),Convolutional Neural Networks(CNN),Recurrent Neural Networks(RNN),Long Short-Term Memory(LSTM),and Bidirectional LSTM(BiLSTM)algorithms utilizing a data set of 257 dynamic pile load tests for the first ***,this research illustrates the multicollinearity effect on DNN,CNN,RNN,LSTM,and BiLSTM models’performance and accuracy for the first time.A comprehensive comparative analysis is conducted,employing various statistical performance parameters,rank analysis,and error matrix to evaluate the performance of these *** performance is further validated using external validation,and visual interpretation is provided using the regression error characteristics(REC)curve and Taylor *** from the comparative analysis reveal that the DNN(Coefficient of determination(R^(2))_(training(TR))=0.97,root mean squared error(RMSE)_(TR)=0.0413;R^(2)_(testing(TS))=0.9,RMSE_(TS)=0.08)followed by BiLSTM(R^(2)_(TR)=0.91,RMSE_(TR)=0.782;R^(2)_(TS)=0.89,RMSE_(TS)=0.0862)model demonstrates the highest performance *** is noted that the BiLSTM model is better than LSTM because the BiLSTM model,which increases the amount of information for the network,is a sequence processing model made up of two LSTMs,one of which takes the input in a forward manner,and the other in a backward *** prediction of pile-bearing capacity is strongly influenced by ram weight(having a considerable multicollinearity level),and the effect of the considerable multicollinearity level has been determined for the model based on the recurrent neural network *** this study,the recurrent neural network model has the least performance and accuracy in predicting the pile-bearing capacity.

关键词： deep learning algorithms high-strain dynamic pile test bearing capacity of the pile

Image Fusion Using Wavelet Transformation and XGboost Algorithm

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Computers, Materials & Continua 2024年第4期79卷 801-817页

作者： Shahid Naseem Tariq Mahmood Amjad Rehman Khan Umer Farooq Samra Nawazish Faten S.Alamri Tanzila Saba Department of Information sciences Division of S&TUniversity of EducationLahore54770Pakistan Artificial Intelligence and Data Analytics(AIDA)Lab CCIS Prince Sultan UniversityRiyadh11586Saudi Arabia Faculty of Information sciences University of EducationVehari CampusVehari61100Pakistan Department of Computer science University of Engineering and TechnologyTaxila47050Pakistan Department of Mathematical sciences College of SciencePrincess Nourah Bint Abdulrahman UniversityRiyadh84428Saudi Arabia

Recently,there have been several uses for digital image *** fusion has become a prominent application in the domain of imaging *** create one final image that provesmore informative and helpful compared to the original input images,image fusion merges two or more initial images of the same *** fusion aims to produce,enhance,and transform significant elements of the source images into combined images for the sake of human visual *** fusion is commonly employed for feature extraction in smart robots,clinical imaging,audiovisual camera integration,manufacturing process monitoring,electronic circuit design,advanced device diagnostics,and intelligent assembly line robots,with image quality varying depending on *** research paper presents various methods for merging images in spatial and frequency domains,including a blend of stable and curvelet transformations,everageMax-Min,weighted principal component analysis(PCA),HIS(Hue,Intensity,Saturation),wavelet transform,discrete cosine transform(DCT),dual-tree Complex Wavelet Transform(CWT),and multiple wavelet *** fusion methods integrate data from several source images of an identical target,thereby enhancing information in an extremely efficient *** precisely,in imaging techniques,the depth of field constraint precludes images from focusing on every object,leading to the exclusion of certain *** tackle thess challanges,a very efficient multi-focus wavelet decomposition and recompositionmethod is *** use of these wavelet decomposition and recomposition techniques enables this method to make use of existing optimized wavelet code and filter *** simulated outcomes provide evidence that the suggested approach initially extracts particular characteristics from images in order to accurately reflect the level of clarity portrayed in the original *** study enhances the performance of the eXtreme Gradient Boosting(XGBoos

关键词： Image fusion max-min average CWT XGBoost DCT inclusive innovations spatial and frequency domain

Confinement of ionomer for electrocatalytic CO2 reduction reaction via efficient mass transfer pathways

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National science Review 2024年第2期11卷 168-176页

作者： Xiaowei Du Peng Zhang Gong Zhang Hui Gao Lili Zhang Mengmeng Zhang Tuo Wang Jinlong Gong School of Chemical Engineering and Technology Key Laboratory for Green Chemical Technology of the Ministry of Education Tianjin University Collaborative Innovation Center of Chemical science and Engineering(Tianjin) National Industry-Education Platform of Energy Storage Tianjin University Joint School of the National University of Singapore and Tianjin University International Campus of Tianjin University Haihe Laboratory of Sustainable Chemical Transformations

Gas diffusion electrodes（GDEs） mediate the transport of reactants, products and electrons for the electrocatalytic CO2reduction reaction（CO2RR） in membrane electrode assemblies. The random distribution of ionomer, added by the traditional physical mixing method, in the catalyst layer of GDEs affects the transport of ions and CO2. Such a phenomenon results in elevated cell voltage and decaying selectivity at high current densities. This paper describes a pre-confinement method to construct GDEs with homogeneously distributed ionomer, which enhances mass transfer locally at the active centers. The optimized GDE exhibited comparatively low cell voltages and high CO Faradaic efficiencies（FE > 90%） at a wide range of current densities. It can also operate stably for over 220 h with the cell voltage staying almost unchanged. This good performance can be preserved even with diluted CO2feeds, which is essential for pursuing a high single-pass conversion rate. This study provides a new approach to building efficient mass transfer pathways for ions and reactants in GDEs to promote the electrocatalytic CO2RR for practical applications.

关键词： CO2 electroreduction gas diffusion electrode mass transfer ionomer Ag catalyst

Folic Acid-Functionalized Nanocrystalline Cellulose as a Renewable and Biocompatible Nanomaterial for Cancer-Targeting Nanoparticles

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Journal of Renewable Materials 2024年第1期12卷 29-43页

作者： Thean Heng Tan Najihah Mohd Hashim Wageeh Abdulhadi Yehya Dabdawb Mochamad Zakki Fahmi Hwei Voon Lee Nanotechnology&Catalysis Research Center(NANOCAT) Universiti MalayaKuala Lumpur50603Malaysia Department of Pharmaceutical Chemistry Faculty of PharmacyUniversiti MalayaKuala Lumpur50603Malaysia Department of Chemistry Faculty of Science and TechnologyUniversitas AirlanggaCampus CMulyorejoSurabaya60115Indonesia

The study focuses on the development of biocompatible and stable FA-functionalized nanocrystalline cellulose(NCC)as a potential drug delivery system for targeting folate receptor-positive cancer *** FA-functionalized NCCs were synthesized through a series of chemical reactions,resulting in nanoparticles with favorable properties for biomedical *** microstructural analysis revealed that the functionalized NCCs maintained their rod-shaped morphology and displayed hydrodynamic diameters suitable for evading the mononuclear phagocytic system while being large enough to target tumor ***,these nanoparticles possessed a negative surface charge,enhancing their stability and repelling potential *** binding specificity of FA-functionalized NCCs to folate receptor-positive cancer cells was demonstrated through various *** free folic acid inhibition assay showed approximately 30%decrease in the binding of functionalized NCCs in the presence of just 5 mM free FA,confirming their selectivity for folate receptor-positive *** microscopy further validated this specificity,as only cancer cells displayed significant binding of functionalized ***,biocompatibility tests revealed that both NCCs and FA-functionalized NCCs had minimal effects on red blood cells,and they did not induce erythrocyte ***,cell viability assays demonstrated functionalized NCCs have selective cytotoxicity against colorectal cancer cells HT-29 and SW-620(68%–88%cell viability)while sparing noncancerous colon cells CCD-18Co(81%–97%cell viability).In summary,FA-functionalized NCCs exhibit promising characteristics for targeted drug delivery in cancer *** biocompatibility,stability,and selective cytotoxicity make them an attractive option for delivering therapeutic agents to folate receptor-positive cancer cells,potentially improving the effectiveness of cancer treatments while minimizing harm to healthy tissues.

关键词： Agricultural wastes sustainable nanocarrier blood biocompatibility folic acid receptor drug delivery system nanomedicine