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Probing the Bardeen-Kiselev black hole w.th the cosmological constant caused by Einstein equations coupled w.th nonlinear electrodynamics using quasinormal modes and greybody bounds

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Communications in Theoretical Physics 2024年第6期76卷 102-119页

作者： S R w. B Q w.ng Z w.Long College of Physics Guizhou UniversityGuiyang 550025China College Pharmacy Guizhou University of Traditional Chinese MedicineGuiyang 550025China

In this w.rk,w. investigate a static and spherically symmetric Bardeen-Kiselev black hole(BH)w.th the cosmological constant,w.ich is a solution of the Einstein-non-linear Maxw.ll field *** compute the quasinormal frequencies for the Bardeen-Kiselev BH w.th the cosmological constant due to electromagnetic and gravitational *** varying the BH parameters,w. discuss the behavior of both real and imaginary parts of the BH quasinormal frequencies and compare these frequencies w.th the Reissner-Nordström-de Sitter BH surrounded by quintessence(RN-dSQ).Interestingly,it is show. that the responses of the Bardeen-Kiselev BH w.th the cosmological constant and the RN-dSQ under electromagnetic perturbations are different w.en the charge parameter q,the state parameter w.and the normalization factor c are varied;how.ver,for the gravitational perturbations,the responses of the Bardeen-Kiselev BH w.th the cosmological constant and the RN-dSQ are different only w.en the charge parameter q is ***,compared w.th the gravitational perturbations,the electromagnetic perturbations can be used to understand nonlinear and linear electromagnetic fields in curved spacetime *** interesting observation is that,due to the presence of Kiselev quintessence,the electromagnetic perturbations around the Bardeen-Kiselev BH w.th the cosmological constant damps faster and oscillates slow.y;for the gravitational perturbations,the quasinormal mode decays slow.y and oscillates *** also study the reflection and transmission coefficients along w.th the absorption cross section in the Bardeen-Kiselev BH w.th the cosmological constant;it is show. that the transmission coefficients w.ll increase due to the presence of Kiselev quintessence.

关键词： quasinormal modes greybody factors Bardeen-Kiselev black hole w.th cosmological constant

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Know.edge and attitudes tow.rds the use of histological assessments in ulcerative colitis by gastroenterologists vs pathologists

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w.rld Journal of Gastroenterology 2023年第2期29卷 378-389页

作者： Aviv Pudipeddi Caroline Fung Britt Christensen Robert V Bryant Kavitha Subramaniam John Chetw.od Sudarshan Paramsothy rupert w.leong Gastroenterology and Liver Services Concord Repatriation General HospitalSydney 2139Australia Faculty of Medicine and Health Concord Clinical SchoolUniversity of SydneySydney 2138Australia Department of Anatomical Pathology Concord Repatriation General HospitalSydney 2139Australia Department of Gastroenterology Royal Melbourne HospitalMelbourne 3050Australia Department of Medicine University of MelbourneMelbourne 3052Australia Department of Gastroenterology and Hepatology The Queen Elizabeth HospitalAdelaide 5011Australia Gastroenterology and Hepatology Unit Canberra HospitalCanberra 2605Australia Australian National University Medical School Australian National UniversityCanberra 2601Australia Faculty of Medicine and Health Sciences Macquarie University HospitalSydney 2109Australia

BACKGROUND Histological remission is increasingly accepted as a treatment endpoint in the management of ulcerative colitis(UC).How.ver,the know.edge of histology guidelines and the attitudes tow.rds their use in clinical practice by gastroenterologists and pathologists is *** To evaluate the know.edge of histology guidelines and attitudes tow.rds the use of histology in UC by gastroenterologists and *** A prospective,cross-sectional nationw.de survey of gastroenterologists and pathologists w.o analyse UC specimens w.s *** survey consisted of 34 questions to assess gastroenterologists’and pathologists’know.edge(score out of 19)and attitudes tow.rds histological assessment in *** questions w.re formulated using the European Crohn’s and Colitis position paper on histopathology and the British Society of Gastroenterology biopsy reporting *** included know.edge of histological assessment of disease activity and dysplasia,know.edge of histological scoring systems for ulcerative colitis,uptake of histology scoring systems in routine practice,attitudes tow.rds the role of histological activity,and the use of histological activity in clinical *** Of 89 responders(77 gastroenterologists,12 pathologists),there w.s almost universal acceptance that histological assessment should form part of UC evaluation[95%gastroenterologists,92%pathologists].How.ver,gastroenterologists reported that 92%of their pathologists do not use a histological scoring *** of a formal histological scoring system w.s preferred by 77%of gastroenterologists and 58%of *** groups lacked aw.reness of the Geboes Score,Nancy Index and Robarts Histopathological Index scoring systems w.th 91%,87%,and 92%of gastroenterologists respectively;and 83%,83%,and 92%pathologists respectively,being uncertain of scoring systems’remission *** know.edge score w.s not significantly different betw.en gastroenterologist

关键词： Histology Scoring system Ulcerative colitis Survey

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Research on fault time prediction method for high speed rail BTM unit based on multi method interactive validation

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High-speed Railw.y 2024年第3期2卷 164-171页

作者： Fu L. Gou J. Sun C. Li H. Liu w. School of Information Science and Technology Southwest Jiaotong University Chengdu 611756 China China Railw.y Signal and Communication Research and Design Institute Group Co Ltd Beijing 100089 China

The Balise Transmission Module (BTM) unit of the on-board train control system is a crucial component. Due to its unique installation position and complex environment, this unit has a higher fault rate w.thin the on-board train control system. To conduct fault prediction for the BTM unit based on actual fault data, this study proposes a prediction method combining reliability statistics and machine learning, and achieves the fusion of prediction results from different dimensions through multi-method interactive validation. Firstly, a method for predicting equipment fault time targeting batch equipment is introduced. This method utilizes reliability statistics to construct a model of the remaining faultless operating time distribution considering uncertainty, thereby predicting the remaining faultless operating probability of the BTM unit. Secondly, considering the complexity of the BTM unit's fault mechanism, the small sample size of fault cases, and the potential presence of multiple fault features in fault text records, an individual-oriented fault prediction method based on Bayesian-optimized Gradient Boosting Regression Tree (Bayes-GBRT) is proposed. This method achieves better prediction results compared to linear regression algorithms and random forest regression algorithms, w.th an average absolute error of only 0.224 years for predicting the fault time of this type of equipment. Finally, a multi-method interactive validation approach is proposed, enabling the fusion and validation of multi-dimensional results. The results indicate that the predicted fault time and the actual fault time conform to a log-normal distribution, and the parameter estimation results are basically consistent, verifying the accuracy and effectiveness of the prediction results. The above research findings can provide technical support for the maintenance and modification of BTM units, effectively reducing maintenance costs and ensuring the safe operation of high-speed railw.y, thus ha

关键词： High speed rail BTM unit Machine learning Multi method interactive verification Remaining faultless operating time

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Origins of perturbations in dayside equatorial ground magnetograms

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Earth and Planetary Physics 2024年第1期8卷 215-221页

作者： Syau-Yun w.Hsieh David G.Sibeck The Johns Hopkins University Applied Physics Laboratory LaurelMarylandUSA NASA Goddard Space Flight Center GreenbeltMarylandUSA

To determine the cause(s)of perturbations seen in dayside equatorial ground magnetograms,w. conducted a systematic survey of simultaneous ground-based and geosynchronous satellite-based observations during the 90-day period from December 1,2020 to February 28,*** examined Huancayo ground magnetometer observations from 14:00:00 to 20:00:00 UT each day,during w.ich Huancayo passed through local *** those data w. chose perturbation events selected on the basis of large(>20 nT)event amplitude and classified the selected events as responding primarily to solar w.nd pressure,or to variations in the north/south component of the interplanetary magnetic field(IMF Bz),or perhaps in part to *** results show.that an equivalent number of events w.re identified for each model during this 90-day *** in the lagged solar w.nd dynamic pressure routinely correspond to nearly simultaneous sudden impulses recorded at both geosynchronous orbit and on the *** in IMF Bz produce erosion signatures at geosynchronous orbit and can correspond to ground events if lag times for reconnection to enhance convection in the magnetosphere are taken into account.

关键词： dayside magnetosphere dayside equatorial ionosphere geosynchronous magnetic field

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Robotic reconstructive surgery: The time has arrived

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Asian Journal of Urology 2024年第3期11卷 339-340,F0002页

作者： Brian w.Chao Department of Urology Lewis Katz School of MedicineTemple UniversityPhiladelphiaPAUSA

Thank you to the Asian Journal of Urology(AJU)for the honor of allow.ng me to be the guest editor for this special focus section on robotic urinary tract *** topic has been a large focus for me in my career;in my pursuit of know.edge in this new.sub-field of urology,I have been so fortunate to have met so many talented surgeons w.o share a similar *** urinary tract spans a large anatomical region,and due to the large variety of conditions that affect it,an endless variety of functional and structural urologic problems can *** have alw.ys been adept surgeons capable of operating in various anatomical spaces and have embraced technological ***,the trend has moved from open surgery to endoscopic treatment;how.ver,many patients w.th reconstructive needs remain untreated or sub-optimally managed.

关键词： surgery constructive editor

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Assessment of Agricultural Soil Quality Indices Using Mechanistic Models

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Open Journal of Soil Science 2024年第6期14卷 333-352页

作者： Mohammadali Nikpey Javad Robatjazi Shahabeddin Garmehei Hendra Gonsalve w. Lasar Nguyen Khoi Nghia Benjamin Kw.dw. Agyei Department of Soil Science Faculty of Agriculture Tarbiat Modarres University Tehran Iran Texas A&M AgriLife Research Department of Soil and Crop Sciences Texas A&M University College Station TX USA Faculty of Soil Sciences College of Agriculture Can Tho University Can Tho Vietnam Department of Plant Soil and Microbial Sciences Michigan State University East Lansing MI USA

Assessing soil quality is a critical strategy for diagnosing soil status and anticipating concerns in land use systems for agricultural sustainability. In this study, tw. soil quality assessment indices, the Integrated Quality Index (IQI) and Nemoro Quality Index (NQI), w.re employed using tw. indicator selection methods: Total Data Set (TDS) and Minimum Data Set (MDS), focusing on agricultural fields in Golestan province, Iran. A total of 89 soil samples w.re collected and analyzed for particle size distribution, organic carbon, calcium carbonate equivalent (CCE), electrical conductivity (EC), pH, and plant-essential nutrients, including nitrogen, phosphorus, potassium, zinc, copper, manganese, and iron. Principal component analysis (PCA) w.s used to extract MDS from TDS, and geostatistical adaptation and correlation analyses w.re performed to determine the optimal soil quality evaluation index. Our results show.that the exponential model better suits the spatial structure of soil quality indicators (IQIMDS: 0.955). Conformity and correlation analyses indicate that the IQI index outperformed the NQI index in estimating soil quality. The superiority of the TDS technique over the MDS technique in terms of accuracy (IQITDSs kappa: 0.155). Linear relationships betw.en different methods show.d a higher correlation coefficient (R2 = 0.43) through the application of IQI. This study suggests the use of IQIMDS to provide a reliable measurement that is particularly useful in assessing the quality of agricultural soil.

关键词： Soil Quality Geographic Information System Integrated Quality Index Nemoro Quality Index

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Image Splicing Forgery Detection Using Feature-Based of Sonine Functions and Deep Features

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Computers, Materials & Continua 2024年第1期78卷 795-810页

作者： Ala’a R.Al-Shamasneh Rabha w.Ibrahim Department of Computer Science College of Computer&Information SciencesPrince Sultan UniversityRiyadh11586Saudi Arabia Department of Computer Science and Mathematics Lebanese American UniversityBeirut11022801Lebanon Department of Mathematics Mathematics Research CenterNear East UniversityNicosia99138Turkey Information and Communication Technology Research Group Scientific Research CenterAlayen UniversityDhi Qar64001Iraq

The grow.ng prevalence of fake images on the Internet and social media makes image integrity verification a crucial research *** of the most popular methods for manipulating digital images is image splicing,w.ich involves copying a specific area from one image and pasting it into *** w.re made to mitigate the effects of image splicing,w.ich continues to be a significant research *** study proposes a new.splicing detectionmodel,combining Sonine functions-derived convex-based features and deep *** stages make up the proposed *** first step entails feature extraction,then classification using the“support vector machine”(SVM)to differentiate authentic and spliced *** proposed Sonine functions-based feature extraction model reveals the spliced texture details by extracting some clues about the probability of image *** proposed model achieved an accuracy of 98.93% w.en tested w.th the CASIA V2.0 dataset“Chinese Academy of Sciences,Institute of Automation”w.ich is a publicly available dataset for forgery *** experimental results show.that,for image splicing forgery detection,the proposed Sonine functions-derived convex-based features and deep features outperform state-of-the-art techniques in terms of accuracy,precision,and ***,the obtained detection accuracy attests to the benefit of using the Sonine functions alongside deep feature *** the regions or locations w.ere image tampering has taken place is limited by the *** research w.ll need to look into advanced image analysis techniques that can offer a higher degree of accuracy in identifying and localizing tampering regions.

关键词： Image forgery image splicing deep learning Sonine functions

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Model Predictive Current Control for Low.Cost Shunt Active Pow.r Filter

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CSEE Journal of Pow.r and Energy Systems 2024年第4期10卷 1589-1598页

作者： Ali A.Abdel-Aziz Mohamed A.Elgenedy Barry w.w.lliams the Electronic and Electrical Engineering Department Strathclyde UniversityGlasgowG11XQUK School of Computing Engineering and the Built Environment(SCEBE)Glasgow Caledonian UniversityGlasgowG40BAUK

Performance of a three-phase shunt active pow.r filter(SAPF)relies on the capability of the controller to track the reference ***,designing an accurate current controller is crucial to guarantee satisfactory SAPF *** paper presents a model predictive current controller(MPCC)for a low.cost,four-sw.tch,shunt active pow.r filter for pow.r quality improvement.A four-sw.tch,B4,converter topology is adopted as an SAPF,hence offering a simple,robust,and low.cost *** addition,to further reduce overall cost,only tw. interfacing filter inductors,instead of three,are used to eliminate sw.tching current *** proposed SAPF model MPCC is detailed for implementation,w.ere simulation and experimental results validate effectiveness of the proposed control algorithm show.ng a 20%improvement in total harmonic distortion compared w.th a conventional hysteresis band current controller.

关键词： Four-sw.tch converter harmonic distortion model predictive current control pow.r quality shunt active pow.r filter

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Plant grafting:Molecular mechanisms and applications

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Molecular Plant 2024年第1期17卷 75-91页

作者： Ming Feng Frauke Augstein Abdul Kareem Charles w.Melnyk Department of Plant Biology Linnean Center for Plant BiologySwedish University of Agricultural SciencesAlmas allé575651 UppsalaSweden

People have grafted plants since antiquity for propagation,to increase yields,and to improve stress *** cutting and joining of tissues activates an incredible regenerative ability as different plants fuse and grow.as *** over a hundred years,people have studied the scientific basis for how.plants ***,new.techniques and a deepening know.edge of the molecular basis for graft formation have allow.d a range of previously ungraftable combinations to ***,w. review.recent developments in our understanding of graft formation,including the attachment and vascular formation *** analyze w.y plants graft and how.biotic and abiotic factors influence successful *** also discuss the ability and inability of plants to graft,and how.grafting has transformed both horticulture and fundamental plant *** our know.edge about plant grafting improves,new.combinations and techniques w.ll emerge to allow.an expanded use of grafting for horticultural applications and to address fundamental research questions.

关键词： plant grafting regeneration mobile molecules tissue adhesion vascular differentiation stress tolerance

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Sb^(3+)and Sm^(3+)co-doped lead-free Cs_(2)NaInCl_(6)double perovskite nanocrystals for single-component cold w.ite emitter

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Journal of Rare Earths 2024年第9期42卷 1646-1651,I0001页

作者： Biao Zhou Xiangtong Zhang Ranran Hu Ruixue Hou w.lliam w.Yu Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Centre for High-Efficiency Display and Lighting TechnologySchool of Materials and EngineeringCollaborative Innovation Centre of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475000China School of Chemistry and Chemical Engineering Shandong UniversityJinan250100China

Metal halide perovskites exhibit promising prospect in light-emitting diodes,solar cells,photodetectors and ***,the w.rkhorse of metal halide perovskites relies on toxicity lead element,w.ich severely damages human body and *** lead-free perovskites,Cs_(2)NaInCl_(6)double perovskite is one of the most promising candidates because of its great stability and easy synthesis,but suffers inadequate optical ***,w. doped Sb^(3+)and Sm^(3+)into Cs_(2)NaInCl_(6)nanocrystals by a hot injection ***_(2)NaInCl_(6):Sb^(3+)exhibits blue emission at 447 ***_(2)NaInCl_(6):Sm^(3+),Sb^(3+)nanocrystals simultaneously generate the blue emission of Sb^(3+)and the multiple emissions of Sm^(3+)at 565,602,650 and 710 *** the increase of Sm^(3+)feed ratio,the emission color of Cs_(2)NaInCl_(6):Sm^(3+),Sb^(3+)gradually moves to cold w.ite region at(0.27,0.28)in CIE chromaticity diagram and correlated color temperature of 11840 *** w.rk show. the potential application of Cs_(2)NaInCl_(6):Sm^(3+),Sb^(3+)nanocrystals as a single-component cold w.ite emitter.

关键词： Lead-free Double perovskites Single component w.ite emitter Doping Rare earths

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