检索结果-南通市图书馆

Optimal Control of Service Rates of Discrete-Time(s,Q)Queueing-Inventory Systems with Finite buffer

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2024年第3期33卷 261-280页

作者： l.Iniya b.Sivakumar G.Arivarignan School of Mathematics Madurai Kamaraj UniversityMaduraiTamilnaduIndia Department of Statistics Manonmaniam Sundaranar UniversityTirunelveliTamilnaduIndia

This article,we develop an optimal policy to control the service rate of a discrete time queueing-inventory system with finite *** customers arrive according to a bernoulli process and the service time for the customers are *** the buffer size attains its maximum,any arriving new customers are considered to be *** customers are served one by one according to FCFS rule and each customers request random number of *** inventory is replenished according to a(s,Q)inventory policy with geometric lead *** main objectives of this article are to determine the service rates to be employed at each slot so that the long run expected cost rate is minimized for fixed inventory level and fixed buffer size and to minimize the expected waiting time for a fixed inventory level and fixed buffer *** problems are modelled as Markov decision *** establish the existence of a stationary policy and employ linear programming method to find the optimal service *** provide some numerical examples to illustrate the behaviour of the model.

关键词： Queueing-inventory system discrete time batch demand-Markov decision process

Non Hodgkin lymphomas (NHl) in the Pediatric Oncology Unit of the Gabriel TouréTeaching Hospital, bamako Mali

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Pediatrics 2019年第4期9卷 309-316页

作者： b.Togo P.Togo O.Kone F.Traore A.K.Doumbia A.Toure A.A.Diakite O.Coulibaly H.Diall1 b.maiga K.Sacko A.Dembele Y.A.Coulibaly D.Konate M.E.Cisse A.A.ba F.l.Diakite l.N.Sidib A.Doumbia H.Konare l.b.maiga C.b.Traore Department of Pediatrics Gabriel TouréTeaching HospitalBamakoMali National Institute of Research in Public health BamakoMali Pathology Service of Point G Teaching Hospital BamakoMali

background :Non-Hodgkin lymphomas are the first childhood cancer in sub-Saharan Africa. Objective: The purpose of this study was to assess non-Hodgkin lymphomas cases in our setting. Methodology: A retrospective and descriptive study carried out in the pediatric oncology unit of the Gabriel Touré Teaching Hospital bamako over 10 years from 1st January 2005 to 31th December 2015. Results: We exploited 274 (21.6%) cases of Non-Hodgkin lymphoma out of 1295 cancer cases registered, the age group 6 - 10 years was the most represented (46.4%);the male sex was predominant with a sex-ratio of 1.8;digestive signs were the most common signs of discovery (44.2%) followed by maxillary swelling (42.7%);the majority of patients (52.9%) consulted between 1 and 3 months after the onset of signs;the malnutrition rate was 39.8%, of which 24.1% were severe cases and 15.7% were moderate rate. Abdominal localization was the most common (43.1%) followed by maxillofacial localization (33.9%). Almost all were burkitt type cytology (92.7%), the majority (73.4%) were in Murphy stage III. Almost all (96%) had received chemotherapy and the modified lMb 01 protocol was widely used (62.4%). The majority of patients (85%) were chemosensitive at day 7 or after the third cyclophosphamide injection but at the end of induction only 31% were in complete remission. Gastrointestinal toxicity was the most common (37.13%) followed by hematologic toxicity 35.09 %;9.12 % of patients were lost of follow-up and 22.26% died. Tumor progression was the most common cause of death (60.66%) followed by infection (21.31%). Conclusion: In light of these findings, the late diagnosis and the poor management of NHl, as well as the limited ability to primarily treat metabolic complications, explain the high case-fatality rate, hence the important role of early diagnosis and treatment multidisciplinary.

关键词： Childhood lymphomas Gabriel TOURE Teaching Hospital Mali

Weighted Probability Density Estimator with Updated bandwidths

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2024年第2期37卷 886-906页

作者： WU Yi YU Wei WANG Xuejun PRAKASA RAO b l S School of big Data and Artificial Intelligence Chizhou UniversityChizhou 247000China School of big Data and Statistics Anhui UniversityHefei 230601China CR Rao Advanced Institute of Mathematics Statistics and Computer ScienceHyderabad 500046India

In this paper,the authors study a class of weighted version of probability density *** is shown that the weighted estimator contains some existing estimators of probability density,no matter they are recursive or *** statistical results including weak consistency,strong consistency,rate of strong consistency,and asymptotic normality are established under some mild ***,the random weighted estimator is also *** numerical simulations and a real data analysis are presented to study the numerical performances of the estimators.

关键词： Asymptotic normality consistency numerical simulation probability density real data analysis updated bandwidths weighted estimator

Semi-analytical investigation of heat transfer in a porous convective radiative moving longitudinal fin exposed to magnetic field in the presence of a shape-dependent trihybrid nanofluid

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2024年第1期45卷 197-216页

作者： C.G.PAVITHRA b.J.GIREESHA M.l.KEERTHI Department of PG Studies and Research in Mathematics Kuvempu UniversityShankaraghatta 577451India Department of Mathematics and Statistics M.S.Ramaiah University of Applied SciencesBengaluru 560058India

The thermal examination of a non-integer-ordered mobile fin with a magnetism in the presence of a trihybrid nanofluid(Fe_3O_4-Au-Zn-blood) is carried out. Three types of nanoparticles, each having a different shape, are considered. These shapes include spherical(Fe_3O_4), cylindrical(Au), and platelet(Zn) configurations. The combination approach is utilized to evaluate the physical and thermal characteristics of the trihybrid and hybrid nanofluids, excluding the thermal conductivity and dynamic viscosity. These two properties are inferred by means of the interpolation method based on the volume fraction of nanoparticles. The governing equation is transformed into a dimensionless form, and the Adomian decomposition Sumudu transform method(ADSTM) is adopted to solve the conundrum of a moving fin immersed in a trihybrid nanofluid. The obtained results agree well with those numerical simulation results, indicating that this research is reliable. The influence of diverse factors on the thermal overview for varying noninteger values of γ is analyzed and presented in graphical representations. Furthermore, the fluctuations in the heat transfer concerning the pertinent parameters are studied. The results show that the heat flux in the presence of the combination of spherical, cylindrical, and platelet nanoparticles is higher than that in the presence of the combination of only spherical and cylindrical nanoparticles. The temperature at the fin tip increases by 0.705 759% when the value of the Peclet number increases by 400%, while decreases by 11.825 13% when the value of the Hartman number increases by 400%.

关键词： convection radiation moving longitudinal fin Adomian decomposition Sumudu transform method(ADSTM) trihybrid nanofluid magnetic field

The Making of a Health Profession:How Chinese Medicine became a Nationally Registered Allied Health Profession in Australia

在线全文

学校读者我要写书评

暂无评论

Chinese Medicine and Culture 2024年第1期7卷 51-62页

作者： John l McDonald Judy b James School of Chinese Medicine Endeavour College of Natural HealthSouthport 4215Australia Acupuncture Now Australia Brisbane 4120Australia

In 2012, traditional Chinese medicine(TCM) practitioners in Australia became nationally-registered allied health professionals in three categories: acupuncturist, Chinese herbal medicine practitioner, and Chinese herbal medicine dispenser. Australia was the first Western country to introduce national registration for Chinese medicine, followed by Portugal and, recently, New Zealand. The practice of TCM in Australia can be traced back to the beginning of Chinese immigration to Australia during the Victorian Gold Rush which began in the 1850s. The process which led to national registration commenced in the early 1970s with the establishment of the first acupuncture courses. Decades of gradual development of courses from unaccredited part-time diplomas to accredited bachelor degrees, and the development, by the profession, of national consensus on educational standards were essential elements in the process which led to registration. Professional associations, such as the Australian Acupuncture and Chinese Medicine Association ltd.(AACMA), also developed a framework of professional selfregulation, including Codes of Ethics, Codes of Conduct, ongoing professional development requirements and Infection Control Guidelines, and provided leadership in the development of the profession. After decades of tribalism and division within the TCM profession, the National Academic Standards Committee brought almost all stakeholders together to reach a consensus on the Australian Guidelines for Traditional Chinese Medicine Education which were published by AACMA in 2001. Professional associations also collaborated on joint submissions to the government in support of registration, which was introduced first in the state of Victoria in 2000, and subsequently became national in 2012. Despite national registration, some barriers still remain, and professional associations continue to lobby the federal government for inclusion in Medicare, chronic disease management scheme, and Veterans

关键词： Acupuncture Chinese medicine Registration Regulation Education Standards Australia TCM

Knowledge Practical Attitude of Health Professionals on breast Cancer at the Hospital of the District of the Commune IV of bamako

在线全文

学校读者我要写书评

暂无评论

Surgical Science 2024年第5期15卷 342-356页

作者： Moussa Samaké Souleymane b. Dembelé Sirama Diarra Yely Dianessy Abdou Guiré Dorcas laurel Sodjiné Yede Amaguiré Saye brahima Dembele birama Traoré Thierno Nadio Ibrahima maiga Mahamane Dicko Modibo Diarra Siaka Konaté Amadou maiga bakary Tientigui Dembele Adégné Togo General Surgery Department of bamako District IV Hospital Bamako Mali Obstetric Gynecology Department of the bamako District IV Hospital Bamako Mali Department of Ophthalmology of the Hospital of the District of the Commune IV of bamako Bamako Mali Imaging Service of the bamako District IV Hospital Bamako Mali Anesthesia and Resuscitation Service of the Hospital of the District of the Commune IV of bamako Bamako Mali Internal Medicine Department of the District Hospital of Commune IV of bamako Bamako Mali General Surgery Department Kolondjeba Referral Health Centre Sikasso Mali General Surgery Department of the Gabriel Touré University Hospital Bamako Mali

Introduction: The level of knowledge and attitude of health professionals about breast cancer are important determinants. General objective: To study the knowledge, attitude and practice of health professionals of the hospital of the district of the commune IV on breast cancer. Methodology: This was a cross-sectional, prospective, descriptive, qualitative and quantitative study. The study period was from 01 October 2022 to December 2022. Results: In one week of survey, 110 health workers (intern, obstetrician nurse, general practitioners and specialists) received the survey sheet, 80 health workers informed it, a participation rate of 73%. The male sex was most represented at 63.75% with a sex ratio of 1.76. The average age was 39.59 years with extremes of 22 and 61 years. The clinical signs evoked by the participants were: breast nodule (81.25%), followed by breast discharge (48.75%). In relation to risk factors: interns and obstetrician nurses had no good knowledge, 51.72% of general practitioners had good knowledge, 43.48% of specialist doctors had good knowledge, and 5.88% of the wise had good knowledge. Conclusion: breast cancer is a common pathology around the world, health professionals are at the forefront of the fight against breast cancer, and this fight cannot be effective without trained personnel.

关键词： Knowledge Attitude Practice Health Personnel breast Cancer

Resistant Pulmonary Tb-HIV Co-Infection in an Infant: About a Case

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Pediatrics 2024年第2期14卷 420-425页

作者： Mariam maiga Pierre Togo Tati Simaga Mariam Traoré Moussa Konaté Mamadou Diallo Alou Samaké Mamadou Keïta Korotoumou Wélé Diallo Djibril Kassogué Pediatrics Department Distric VI Reference Health Center Bamako Mali Paediatrics Department Gabriel Touré Teaching Hospital Bamako Mali Pediatrics Department Mali Hospital Bamako Mali Paediatrics Department Timbuktu Regional Hospital Bamako Mali

Diagnosis of childhood tuberculosis (Tb) is difficult, especially in resource-limited countries where the number of reported cases of Tb-HIV co-infection continues to rise. This co-infection poses a diagnostic and therapeutic problem for caregivers. We report a case of rifampicin-resistant HIV-Tb pulmonary coinfection in a 19-month-old infant.

关键词： Tuberculosis Rifampicin Resistance HIV Infants

Knotting ligands to control metal coordination geometry

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2024年

作者： Fabien b.l.Cougnon Department of Chemistry and Nanoscience Centre University of Jyv?skyl?

Zinc is a metal of particular importance for life [1]. It is the most abundant transition metal in biological systems after iron and contributes both structural and catalytic roles to many cellular processes. The properties of ZnII, unlike those of any other first-row transition metal ions, explain its biological relevance. Due to its filled d-shell orbitals, ZnIIis redox-stable, has a ligand-field energy stabilization of zero and, consequently, no typical coordination number and geometry. Zinc metalloproteins exploit these features to carry a broad range of chemical reactions in mild *** metalloenzymes, unsaturated ZnIIcentres often act as redox-stable lewis acids. The protein backbone provides a highly preorganized environment around the metal centre and accompanies the changes in coordination geometry occurring as substrate transformation proceeds, thereby modulating the metal reactivity.

关键词：

In situ TEM investigation of electron irradiation and aging-induced high-density nanoprecipitates in an Mg-10Gd-3Y-1Zn-0.5Zr alloy

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第5期12卷 1841-1853页

作者： M.lv H.l.Ge Q.Q.Jin X.H.Shao Y.T.Zhou b.Zhang X.l.Ma Shenyang National laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Materials Science and Engineering Research Center Guangxi University of Science and TechnologyLiuzhou 545006China

In-situ electron irradiation and aging are applied to introduce high-density precipitates in an Mg-10Gd-3Y-1Zn-0.5Zr(GWZ1031K,wt.%)alloy to improve the *** results show that the hardness of the Mg alloy after irradiation for 10 h and aging for 9 h at 250℃ is 1.64 GPa,which is approximately 64% higher than that of the samples before being *** is mainly attributed to γ'precipitates on the basal plane after irradiation and the high-density nanoscale β'precipitates on the prismatic plane after aging,which should be closely related to the irradiation-induced homogenous *** latter plays a key role in precipitation *** result paves a way to improve the mechanical properties of metallic materials by tailoring the precipitation through irradiation and aging.

关键词： Mg alloy Electron beam irradiation Hardening Precipitates In-situ TEM