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Incense smoke(IS)inhalation exposure system:Physicochemical characterization,IS particle deposition and clearance in human airway using MPPD model

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Particuology 2024年第4期87卷 271-285页

作者： Vyas Kumar Hafsa Hashmi Anshita Nasreen Ghazi Ansari Jyotsna Singh Inhalation Toxicology Facility Regulatory Toxicology GroupCSR-Indian Institute of Toxicology ResearchLucknow22001UPIndi Academy of Scientific and Innovative Research(AcsSIR) Ghaziabad201002UPIndia Analytical Chemistry Regulatory Toxicology GroupCSIR-Indian Institute of Toxicology ResearchLucknow226001UPIndia

Incense smoke(IS)is source of indoor air pollution and key risk for diverse human *** in-formation is available regarding controlled IS rodent inhalation exposure system and IS particulate matter(PM)deposition in human *** aimed to demonstrate stable ISPM physicochemical parameters of 10 incense products inside the customized whole body inhalation exposure chamber(without animal)connected to smoke generation unit via aerosol mixing *** analyzed for size segregated PM emission,ISPM in vitro aerodynamics(MMAD and GSD determination),fine and ultrafine particle's SEM,SEM-EDX and PAH *** real life exposure scenario by utilizing MMAD,GSD and PM concentration after Tier 1 exposure assessment as key input parameters,ISPM dosimetry in infant(3 months)and adult(21 years male and female)human airways was calculated using multiple-path particle dosimetry(MPPD 3.04)*** median aerodynamic diameter(MMAD)and geo-metric standard deviation(GSD)ranged between 0.55 and 2.10μm and 1.22 to 1.77(polydisperse)***1.0 and PM0.1 showed multiple morphology and presence of heavy and trace *** like acenaphthylene,anthracene,fluorene,naphthalene and phenanthrene were detected(0.84-143.17μg/g).MPPD results showed higher ISPM deposition in pulmonary region and lowest in trachea bronchial *** deposition in tissue was higher in lower,peripheral lung as compared to upper and central lung *** body inhalation exposure system showed stable IS atmosphere(physi-cochemical parameters)indicating the device suitability in future inhalation *** ISPM deposition fraction and clearance data showed deep lung penetrating and retention behavior with higher risk in infant followed by female and then *** modeled particle deposition and clearance data may be useful in risk assessment analysis of IS.

关键词： Inhalation Incense smoke Multiple-path particle dosimetry(MPPD) Particle deposition Particulate matter(PM) Mass median aerodynamic diameter (MMAD) Human airway

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Critical Opalescence and Its Impact on the Jet Quenching Parameter q

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Chinese Physics Letters 2024年第3期41卷 23-29页

作者：武警曹杉杉李峰 School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China Research Center for Hadron and csr Physics Lanzhou University and Institute of Modern Physics of CASLanzhou 730000China Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu Provinceand Frontiers Science Center for Rare IsotopesLanzhou UniversityLanzhou 730000China Frontiers Science Center for Rare Isotopes Lanzhou UniversityLanzhou 730000China

Jet quenching parameter q is essential for characterizing the interaction strength between jet partons and nuclear *** on the quark-meson model,we develop a new framework for calculating q at finite chemical potential... 详细信息

关键词： parameter quark calculating

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Critical Opalescence and Its Impact on the Jet Quenching Parameter ■

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Chinese Physics Letters 2024年第3期41卷 28-34页

作者：武警曹杉杉李峰 School of Physical Science and Technology Lanzhou University Institute of Frontier and Interdisciplinary Science Shandong University Research Center for Hadron and csr Physics Lanzhou University and Institute of Modern Physics of CAS Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu Provinceand Frontiers Science Center for Rare Isotopes Lanzhou University Frontiers Science Center for Rare Isotopes Lanzhou University

Jet quenching parameter ■ is essential for characterizing the interaction strength between jet partons and nuclear matter. Based on the quark-meson model, we develop a new framework for calculating ■ at finite chemi...

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Epidemiological and Clinical Profile and Immediate Outcome of Neonates Transferred from the Maternity Unit to the Neonatology Unit of the csrEF in Commune V of Bamako District, Mali

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Open Journal of Pediatrics 2024年第3期14卷 547-557页

作者： Maimouna Kante Ya Traoré Balilé Harber Beydari Mamadou Traoré Issiaka Koné Diéneba Sacko Maimouna Haidara Korotoumou Bamba Assitan Farota Abdoulaye Kassogué Mohamed Diarra Dramane Touré Abdoul Salam Diarra Leyla Maïga Dicko Fatoumata Paediatric Ward CSR&#233f CV Bamako Mali Paediatric Ward of Nianankoro Fomba Hospital S&#233gou Mali Paediatric Ward of Kalaban CorocsrEF Bamako Mali Pediatric Department of the Mopti Reference Health Center Mopti Mali National Centre for Scientific and Technological Research Bamako Mali Paediatrics Department Mohamed VI Perinatal Clinic Bamako Mali Department of Paediatrics Gabriel Tour&#233 University Hospital Bamako Mali

Introduction: Neonatal mortality remains a major public health concern. According to the World Health Organisation (WHO), the number of newborns dying each year has fallen from 5 million in 1990 to 2.4 million in 2019. The aim of our study was to describe the main morbid conditions and their lethality in newborns admitted to the paediatric ward of the csrEF in Commune V. Methodology: We conducted a 12-month prospective descriptive and analytical study from August 2020 to July 2021. Results: During the 12 months of the study, out of 2654 neonates admitted to hospital, 216 met our inclusion criteria, i.e. 8%. Newborns admitted in the first few hours of life represented 99.54% of cases. Full-term newborns accounted for 65.74% of the total. Forty-eight percent of newborns had hypothermia on admission. The most common diagnosis was asphyxia in 55.56% of cases, followed by neonatal infection in 27.78% and prematurity in 10.65%. Death was recorded in 22.2% of cases. Asphyxia was the main cause of neonatal death, followed by prematurity in our context. Conclusion: Improving the prognosis of newborn babies will require a thorough understanding of neonatal pathologies and the implementation of a pre- and perinatal prevention policy.

关键词： Newborns Morbidity Mortality

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Analysis of Strong Coupling Constant with Machine Learning and Its Application

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Chinese Physics Letters 2024年第3期41卷 15-22页

作者：王晓云董晨刘翔 Department of Physics Lanzhou University of TechnologyLanzhou 730050China Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu ProvinceLanzhou UniversityLanzhou 730000China School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China Research Center for Hadron and csr Physics Lanzhou University and Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China MoE Frontiers Science Center for Rare Isotopes Lanzhou UniversityLanzhou 730000China Key Laboratory of Quantum Theory and Applications of MoE Lanzhou UniversityLanzhou 730000China

We investigate the nature of the strong coupling constant and related *** the analysis of accumulated experimental data around the world,we employ the ability of machine learning to unravel its physical *** result of our efforts is a formula that captures the expansive panorama of the distribution of the strong coupling constant across the entire energy range.

关键词： Strong coupling accumulated

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Comprehensive DDoS Attack Classification Using Machine LearningAlgorithms

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Computers, Materials & Continua 2022年第10期73卷 577-594页

作者： Olga Ussatova Aidana Zhumabekova Yenlik Begimbayeva Eric T.Matson Nikita Ussatov Al-Farabi Kazakh National University Almaty050040Kazakhstan Institute of Information and Computational Technologies Almaty050010Kazakhstan Satbayev University Almaty050013Kazakhstan Purdue University West Lafayette47907INUSA turan University Almaty050013Kazakhstan

The fast development of Internet technologies ignited the growthof techniques for information security that protect data, networks, systems,and applications from various threats. There are many types of threats. Thededicated denial of service attack (DDoS) is one of the most serious andwidespread attacks on Internet resources. This attack is intended to paralyzethe victim’s system and cause the service to fail. This work is devoted tothe classification of DDoS attacks in the special network environment calledSoftware-Defined Networking (SDN) using machine learning algorithms. Theanalyzed dataset included instances of two classes: benign and *** the dataset contained twenty-two features, the feature selection techniques were required for dimensionality reduction. In these experiments, theInformation gain, the Chi-square, and the F-test were applied to decreasethe number of features to ten. The classes were also not completely balanced, so undersampling, oversampling, and synthetic minority oversampling(SMOTE) techniques were used to balance classes equally. The previousresearch works observed the classification of DDoS attacks applying variousfeature selection techniques and one or more machine learning ***, they did not pay much attention to classifying the combinations offeature selection and balancing methods with different machine learningalgorithms. This work is devoted to the classification of datasets with eightmachine learning algorithms: naïve Bayes, logistic regression, support vectormachine, k-nearest neighbors, decision tree, random forest, XGBoost, andCatBoost. In the experimental results, the Information gain and F-test featureselection methods achieved better performance with all eight ML algorithmsthan with the Chi-square technique. Furthermore, the accuracy values of theoversampled and SMOTE datasets were higher than that of the undersampledand imbalanced datasets. Among machine learning algorithms, the accuracyof support vector

关键词： Internet security networks systems DDoS software-defined networking feature selection class balancing machine learning XGBoost CatBoost

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Annealing temperature influence on the degree of inhomogeneity of the Schottky barrier in Ti/4H–SiC contacts

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Chinese Physics B 2014年第12期23卷 418-422页

作者：韩林超申华军刘可安王弋宇汤益丹白云许恒宇吴煜东刘新宇 Microwave Device and IC Department Institute of Microelectronics Chinese Academy of Sciences Zhuzhou csr Times Electric Co. Ltd Zhuzhou csr Times Electric Co. Ltd

Tung＇s model was used to analyze anomalies observed in Ti/Si C Schottky contacts. The degree of the inhomogeneous Schottky barrier after annealing at different temperatures is characterized by the ‘T0anomaly＇ and the difference（△Φ）between the uniformly high barrier height（Φ0B） and the effective barrier height（Φeff B）. Those two parameters of Ti Schottky contacts on 4H–Si C were deduced from I–V measurements in the temperature range of 298 K–503 K. The increase in Schottky barrier（SB） height（ΦB） and decrease in the ideality factor（n） with an increase measurement temperature indicate the presence of an inhomogeneous SB. The degree of inhomogeneity of the Schottky barrier depends on the annealing temperature, and it is at its lowest for 500-°C thermal treatment. The degree of inhomogeneity of the SB could reveal effects of thermal treatments on Schottky contacts in other aspects.

关键词： Schottky contact Si C inhomogeneity barrier

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Photo-and electro-production of narrow exotic states:From light quarks to charm and up to bottom

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Frontiers of physics 2023年第4期18卷 71-94页

作者： Xu Cao Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 China University of Chinese Academy of Sciences Beijing 100049China Research Center for Hadron and csr Physics Lanzhou University and Institute of Modern Physics of CASLanzhou 730000China

Accessing a full image of the inner content of hadrons represents a central endeavour of modern particle physics,with the main scientific motivation to investigate the strong interaction binding the visible *** the one hand,the structure of known exotic candidates is a fundamental open issue addressed widely by *** the other hand,looking for new states of exotic nature is a central component for theoretical and experimental efforts from electron-positron machine and electron accelerator with fixed target to heavy ion and electron-ion *** this article we present a succinct short overview of the attempt to search for exotic narrow N∗and Z states containing light quarks only or also charm,and its connotation for bottom regions(the latter two are also known as Pc(Zc)and Pb(Zb)states,respectively in the literature).We address the effort of searching for exotic narrow N∗and Z states in light quark *** focus on recent progress in searching for signal of Pc and Zc states photoproduction and its implication into the Pb and Zb photoproduction and their decay *** also discuss future perspectives for the field in electron-ion colliders,a good place to disentangle the nature of some of these states and investigate some other enlightening topics including QCD trace anomaly and quarkonium-nucleon scattering length.

关键词： exotic states photo-and electro-production electron-ion colliders hadron

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Charge trapping behavior and its origin in Al_2O_3/SiC MIS system

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Chinese Physics B 2015年第8期24卷 523-528页

作者：刘新宇王弋宇彭朝阳李诚瞻吴佳白云汤益丹刘可安申华军 Microwave Device and IC Department Institute of Microelectronics Chinese Academy of Sciences Zhuzhou csr Times Electric Co. Ltd

Charge trapping behavior and its origin in Al2O3/SiC MOS structure are investigated by analyzing the capacitance–voltage(C–V) hysteresis and the chemical composition of the interface. The C–V hysteresis is measured as a function of oxide thickness series for an Al2O3/SiC MIS capacitor. The distribution of the trapped charges, extracted from the C–V curves, is found to mainly follow a sheet charge model rather than a bulk charge model. Therefore, the electron injection phenomenon is evaluated by using linear fitting. It is found that most of the trapped charges are not distributed exactly at the interface but are located in the bulk of the Al2O3 layers, especially close to the border. Furthermore, there is no detectable oxide interface layer in the x-ray photoelectron spectroscope(XPS) and transmission electron microscope(TEM)measurements. In addition, Rutherford back scattering(RBS) analysis shows that the width of the Al2O3/SiC interface is less than 1 nm. It could be concluded that the charge trapping sites in Al2O3/SiC structure might mainly originate from the border traps in Al2O3 film rather than the interface traps in the interfacial transition layer.

关键词： Al2O3 Si C charge trapping sites interface

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Assembly Auxiliary System for Narrow Cabins of Spacecraft

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Chinese Journal of Mechanical Engineering 2015年第5期28卷 1080-1088页

作者： LIU Yi LI Shiqi WANG Junfeng School of Mechanical Science & Engineering Huazhong University of Science and Technology csr Zhuzhou Electric Locomotive Co. Ltd.

Due to the narrow space and complex structure of spacecraft cabin, the existing asssembly systems can not well suit for the assembly process of cabin products. This paper aims to introduce an assembly auxiliary system for cabin products. A hierarchical-classification method is proposed to re-adjust the initial assembly relationship of cabin into a new hierarchical structure for efficient assembly planning. An improved ant colony algorithm based on three assembly principles is established for searching a optimizational assembly sequence of cabin parts. A mixed reality assembly environment is constructed with enhanced inforamtion to promote interaction efficiency of assembly training and guidance. Based on the machine vision technology, the inspection of left redundant objects and measurement of parts distance in inner cabin are efficiently performed. The proposed system has been applied to the assembly work of a spacecraft cabin with 107 parts, which includes cabin assembly planning, assembly training and assembly quality inspection. The application result indicates that the proposed system can be an effective assistant tool to cabin assembly works and provide an intuitive and real assembly experience for workers. This paper presents an assembly auxiliary system for spacecraft cabin products, which can provide technical support to the spacecraft cabin assembly industry.

关键词： assembly planning hierarchical-classification ant colony algorithm augmented reality visual inspection

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