检索结果-南通市图书馆

A Hierarchical Method for Locating the Interferometric Fringes of Celestial Sources in the Visibility Data

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第3期24卷 110-128页

作者： Rong ma Ruiqing Yan Hanshuai Cui Xiaochun Cheng Jixia Li Fengquan Wu Zongyao Yin Hao Wang Wenyi Zeng Xianchuan Yu School of Artificial Intelligence Beijing Normal UniversityBeijing 100875China Department of Computer Science Swansea UniversitySwanseaSA18ENUK National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

In source detection in the Tianlai project,locating the interferometric fringe in visibility data accurately will influence downstream tasks drastically,such as physical parameter estimation and weak source *** that traditional locating methods are time-consuming and supervised methods require a great quantity of expensive labeled data,in this paper,we first investigate characteristics of interferometric fringes in the simulation and real scenario separately,and integrate an almost parameter-free unsupervised clustering method and seeding filling or eraser algorithm to propose a hierarchical plug and play method to improve location ***,we apply our method to locate single and multiple sources’interferometric fringes in simulation ***,we apply our method to real data taken from the Tianlai radio telescope ***,we compare with unsupervised methods that are state of the *** results show that our method has robustness in different scenarios and can improve location measurement accuracy effectively.

关键词： methods data analysis-techniques image processing-techniques interferometric

海上丝路与中国天文历法在日本的传播及影响研究

在线全文

学校读者我要写书评

暂无评论

自然辩证法通讯 2024年第4期46卷 57-65页

作者：萨日娜上海交通大学科学史与科学文化研究院上海200240

经过海上丝路有大量汉文科学典籍传入日本并产生了重要的影响,天文历法知识是其中重要的一个方面。文中通过史料调查和实证考察,探索了魏晋南北朝时期,中国天文知识传日背景;研究隋唐时期,随着海上丝路的发展,日本留学生(僧)把中国天文... 详细信息

经过海上丝路有大量汉文科学典籍传入日本并产生了重要的影响,天文历法知识是其中重要的一个方面。文中通过史料调查和实证考察,探索了魏晋南北朝时期,中国天文知识传日背景;研究隋唐时期,随着海上丝路的发展,日本留学生(僧)把中国天文知识传至日本的详情,尤其考察了唐历《宣明历》在日本使用八百多年之久的缘由;继而分析了宋元明时期,中国传统天文历法持续传日,并对其传统学术建构产生的深远影响。结论认为研究中日传统天文历法的关联性,不仅有助于认识海上丝路文明对日本传统科技的影响,对提升中华传统文化的国际传播力和影响力也有一定的借鉴意义。

关键词：海上丝路天文历法传统科技中日交流

在线全文

学校读者我要写书评

暂无评论

面向大数据的分布式存储与访问优化框架

通信电源技术 2024年第7期41卷 225-227页

作者：马洒尹孟洋南阳科技职业学院河南南阳474150

文章针对大数据时代的存储与访问挑战,提出一种面向大数据的分布式存储与访问优化框架。提出总体框架设计,明确了分布式存储与访问系统的整体架构和功能模块。针对数据存储问题,研究了数据压缩和存储技术的优化方法,以提高存储效率和数... 详细信息

文章针对大数据时代的存储与访问挑战,提出一种面向大数据的分布式存储与访问优化框架。提出总体框架设计,明确了分布式存储与访问系统的整体架构和功能模块。针对数据存储问题,研究了数据压缩和存储技术的优化方法,以提高存储效率和数据可靠性。针对分布式访问问题,研究了基于负载均衡的数据访问优化方法,以提高系统的整体性能和吞吐量。通过分析和讨论,探讨了方法的特点和改进空间,为分布式存储与访问技术的进一步研究提供了参考。

关键词：大数据分布式存储小波变换负载均衡

Advanced transparent composite membranes for efficient ultraviolet protection and thermal regulation

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2024年第18期69卷 2799-2801页

作者： Yangzhe Hou Xiao Su Jun ma Unisa STEM and Future Industries Institute University of South AustraliaMawson Lakes SA5095Australia

Throughout human history,our fundamental reliance on the sun has been evident in various activities,including farming,herding,fishing and *** designs have been profoundly influenced by the necessity to maximize sunlight intake,which is exemplified by the traditional Chinese architectural principle of“facing south with the back to the north”.This orientation promotes solar gain during cold months,enhancing the thermal efficiency of ***,the introduction of glass in the building construction has marked a significant advancement,which has enabled the effective utilization of natural light while providing protection from certain weather conditions such as wind and *** science and technology progress,solar energy is increasingly recognised as a plentiful and environmentally friendly source of energy,both renewable and devoid of pollution[1].

关键词： transparent ultraviolet architectural

Direct somatic embryogenesis and related gene expression networks in leaf explants of Hippeastrum ‘Bangkok Rose’

在线全文

学校读者我要写书评

暂无评论

Horticultural Plant Journal 2024年第2期10卷 556-572页

作者： Jingjue Zeng Yi Deng Shahid Iqbal Jiarui Zhang Kunlin Wu Guohua ma Lin Li Guangyi Dai Rufang Deng Lin Fang Songjun Zeng Guangdong Provincial Key Laboratory of Applied Botany South China Botanical GardenChinese Academy of SciencesGuangzhouGuangdong 510650China University of the Chinese Academy of Sciences Beijing 100049China South China National Botanical Garden GuangzhouGuangdong 510650China Zhaoqing Branch Center of Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology ZhaoqingGuangdong 526000China Horticultural Science Department North Florida Research and Education CenterUniversity of Florida/IFASQuincyFL 32351USA Public Laboratory of South China Botanical Garden Chinese Academy of SciencesGuangzhouGuangdong 510650China Key Laboratory of South China Agricultural Plant Molecular Analysis and Gene Improvement South China Botanical GardenChinese Academy of SciencesGuangzhouGuangdong 510650China

Hippeastrum, a highly diverse genus in the Amaryllidaceae family, is a valuable ornamental bulbous flowering plant. Somatic embryogenesis(SE) is an efficient method for mass production of Hippeastrum plantlets. Previous studies have been devoted to the in vitro propagation of Hippeastrum, but the SE and its regulatory networks are rarely reported. In this study, we established a direct SE method of Hippeastrum Bangkok Rose' using leaf bases as explants. MS supplemented with 1.00 mg·L^(-1)NAA +1.00 mg·L^(-1)KT + 0.25 mg·L^(-1)TDZ was the optimal medium for SE. Histological observations showed that the bipolar somatic embryo originated from the epidermal cell layer and underwent initiation,globular, scutellar and coleoptile stages. During SE, endogenous hormones of IAA, CTK, ABA, and sa were highly accumulated. Transcriptomic analysis revealed the genes encoding auxin biosynthesis/metabolic enzymes and efflux carriers were induced, while the auxin receptor of TIR1 and ARF transcriptional repressor of Aux/IAA were down-regulated and up-regulated, respectively, leading to suppression of auxin signaling. In contrast, cytokine signaling was promoted at the early stage of SE, as biosynthesis, transport, and signaling components were *** stress-related genes were up-regulated at the early or late stages of SE. Chromatin remodeling could also be dynamically regulated via distinct expression enzymes that control histone methylation and acetylation during SE. Moreover, key SE regulators, including WOXs and SERKs were highly expressed along with SE. Overall, the present study provides insights into the SE regulatory mechanisms of the Hippeastrum.

关键词： Hippeastrum Tissue culture Somatic embryogenesis Gene regulation

Dry eye rate and its relationship with disease stage in patients with primary hypertension:a cross-sectional study in Vietnam

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2024年第4期17卷 653-658页

作者： Tran Tat Thang Pham Hong Phuong Nguyen sa Huynh Nguyen Trung Kien NguyenDuy Toan Nguyen Thi Thu Ha Le Ha Khoa Nguyen Huu Dung Thai Doan Thang Le Viet Thang Nghe An Eye Hospital Nghe An 43000Vietnam Nghe An Friendship General Hospital Nghe An 43000Vietnam Military Hospital 103 Ha Noi 100000Vietnam Vietnam Military Medical University Ha Noi 100000Vietnam Hanoi Medical University Ha Noi 100000Vietnam Bạch mai Hospital Ha Noi 100000Vietnam TTH Vinh General Hospital Nghe An 100000Vietnam

AIM:To determine the dry eye(DE)rate and its relationship with disease stage in patients with primary ***:A cross-sectional study included 432 patients with primary hypertension(with an equal number of patients in each group:144 in stage Ⅰ,Ⅱ,and Ⅲ hypertension)and 144 healthy subjects as a control *** Ocular Surface Disease Index(OSDI)and Schirmer Ⅰ test without anesthetics were conducted on all 576 *** with OSDI scoresma urea,creatinine,and high-sensitivity C-reactive protein(CRP-hs)levels in hypertension patients with DE were higher than those without DE,Pma creatinine,and CRP-hs levels were independent factors associated with DE in primary hypertension patients,Pma CRP-hs,and creatinine levels in patients with primary hypertension.

关键词： primary hypertension dry eye stage of hypertension plasma creatinine

Therapeutic Profile and Prognostic Factors of Patients Suffering from Upper Digestive Bleeding at Sikasso Regional Hospital

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 Gastroenterology 2024年第9期14卷 300-312页

作者： Oumar Traoré Abdoul salam Diarra Dramane Touré Tawfiq Abu Amadou Boubeye maïga Kadiatou Cissé saïdon Touré Mohomedine Touré Aboudou Dolo Youana Koné madou Traoré mamadou Togo Kalba Péliaba mamadou samaké Hamadoun sangho Service of Internal Medicine Regional Hospital Sikasso Mali National Center for Scientific and Technological Research Bamako Mali Department of Pediatric Health Referral Center of Kalaban Coro Koulikoro Mali Private Practice for Family and Emergency Medicine Casablanca Morocco Service of Nephrology Regional Hospital Sikasso Mali Department of Infectious Disease Regional Hospital Sikasso Mali Service de Mdecine Interne CHU Gabriel Tour Bamako Mali Service dHpato-Gastro-Entrologie CHU Gabriel Tour Bamako Mali Department of Public Health Faculty of Medicine and Odontostomatology University of Sciences Techniques and Technologies of Bamako Bamako Mali

Introduction: Upper digestive hemorrhage is one of the main digestive emergencies and remains a major cause of morbidity and mortality in mali. The aim of this study was to describe the therapeutic profile and outcome of patients suffering from upper digestive haemorrhage. Methodology: This was a prospective study carried out in the internal medicine department of the Sikasso Regional Hospital from August 2022 to July 2023. All adult patients presenting with upper digestive haemorrhage and having given their consent, were included. Data were analyzed using SPSS version 21 software. Results: Sixty-three patients were enrolled. The mean age was 49.7 ± 18.99 years, with a male-female sex ratio of 2.2. Ruptured esophageal varices (37.5%) and peptic ulcer (25%) were the main etiologies. Pharmacological treatment was dominated by proton pump inhibitors (85.7%). Hemostasis endoscopy accounted for 3.17%. The evolution was marked by hemorrhagic arrest (69.84%), recurrence of hemorrhage (11.11%) and death (19.04%), the main cause of which was hemorrhagic shock (58.3%). We found no statistically significant relationship between prognosis and etiologies (P = 0.11), and length of hospital stay (P = 0.18). Conclusion: Hemostasis endoscopy remains a challenge for Sikasso Hospital. A holistic strategy of communication and community awareness-raising, combined with adequate technical facilities, will help to improve patient care and outcomes.

关键词： Digestive Hemorrhage Digestive Endoscopy Treatment Outcome

Factors Associated with HPV Vaccine Uptake among Girls Aged 9 - 14 in the Langue de Barbarie Area of saint-Louis, Senegal in 2024

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 Immune Based Therapies, Vaccines and Antimicrobials 2024年第1期13卷 1-15页

作者： Papa Djibril Ndoye Lebem Togtoga Abdourahmane Ndong mamadou saïdou Bah Khadim Niang Departement of Public Health and Social Medicine UFR of Health Science Gaston Berger University Saint-Louis Senegal ENDA sant Dakar Senegal

Introduction: The HPV vaccine was included in the Expanded Programme on Immunisation in Senegal in 2018. However, vaccination coverage is still low among targeted girls. The aim of this research was to study the factors associated with vaccine uptake among girls aged 9 - 14 years in the Langue de Barbarie area of saint-Louis, Senegal. Methodology: This was a descriptive and analytical cross-sectional study. The sample size was calculated using the Schwartz formula and distributed proportionally to the size of the population in the neighborhoods. Data were collected from 2nd to 19th January 2024 from mothers or guardians of girls aged 9 to 14 using anonymous questionnaires configured on tablets with Survey 123 software and analysed using R software. Results: A total of 799 people were interviewed. The average age of the respondents was 35.67 years, with a standard deviation of 7.08 and a range of 17 and 49 years. Reported vaccination coverage was 41.9%. Factors positively correlated with vaccination included: attendance at primary school or daara (OR = 2.50 [CI: 1.43 - 4.48] and OR = 2.05 [CI: 1.09 - 3.94]), information about vaccination (OR = 6.64 [CI: 4.59 - 9.72]), history of cervical cancer screening among mothers or guardians (OR = 6.64 [CI: 4.59 - 9.72]). Conclusion: Identifying the factors associated with HPV vaccination is necessary to assess and improve the vaccination strategy in order to improve vaccination coverage among targeted girls.

关键词： Cervical Cancer Vaccine HPV Girls Risk Senegal

Study on the Knowledge of Mothers or Guardians of Girls Aged 9 - 14 from the Langue de Barbarie in saint-Louis, Senegal about Cervical Cancer and Its Relationship to HPV Vaccination in 2024

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 Immune Based Therapies, Vaccines and Antimicrobials 2024年第2期13卷 17-31页

Introduction: The relationship between knowledge of HPV and vaccination has been established. The aim of this study was to investigate the knowledge of mothers or guardians of girls aged 9 - 14 about cervical cancer and their attitudes to HPV vaccination. Methodology: This was a descriptive cross-sectional survey. The sample size was calculated using the Schwartz formula and distributed proportionally to the size of the neighbourhood population. Data was collected between 2nd to 19th January 2024 using anonymous questionnaires configured on tablets with Survey 123 software and analysed using R software. Results: A total of 799 people were interviewed. The average age of the respondents was 35.67 years, with a standard deviation of 7.08 and a range of 17 and 49 years. The information channels for cervical cancer were the media (82.8%), health facilities (47.7%) and community intermediaries (23.3%). Only 53.7% had information about the vaccine and 25.5% about the vaccination strategy. The main reason for accepting the vaccine was awareness of the seriousness of cervical cancer (55.1%). Conclusion: It is essential to take stock of knowledge about cervical cancer and attitudes to vaccination to assess the impact of interventions and redirect strategies to improve vaccination coverage. .

关键词： Cervical Cancer HPV Vaccine Knowledge Girls Senegal