检索结果-南通市图书馆

Performance evaluation and optimization design of photoelectric pyrometer detection optical system

同方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

Defence Technology（防务技术） 2020年第2期16卷 401-407页

作者： Xue-yan han Ke-wei Huan Shan-ju Sheng School of Science Changchun University of Science and TechnologyChangchun 130022China

The measurement and control of high temperature play very important roles in national defense,military,scientific experiments,industrial and agricultural *** pyrometer is one of the important radiation thermometers for non-contact temperature *** has an important application in the field of high temperature measurement,and its performance directly affects the accuracy of temperature *** improving the design of the detection optical system of the photoelectric pyrometer,the imaging performance of the photoelectric pyrometer can be improved effectively,and the temperature measurement accuracy can be *** this paper,the temperature measurement principle of photoelectric pyrometer,the wo rking principle of the detection optical system and the composition of the system are *** optical components that affect the imaging of the optical system of the photoelectric pyrometer are *** optical pyrometer detection optical system is simulated by ZEMAX software,based on the analysis results,the Modulation Transfer Function(MTF)and the spot Diagram are used as the main evaluation criteria to optimize the design of the objective lens of the photoelectric pyrometer detection optical *** imaging performance of the photoelectric pyrometer detection optical system and the accuracy of temperature measurement of the photoelectric pyrometer are improved by optimization design of the detection optical system.

关键词： Photoelectric pyrometer Detection optical system ZEMAX MTF Spot diagram

41例慢性HBV感染危重孕产妇的临床特征分析

在线全文

学校读者我要写书评

暂无评论

临床肝胆病杂志 2024年第2期40卷 258-263页

作者：鞠宇豪李文王雨肖玲燕郑以山韩国荣南京中医药大学附属南京医院(南京市第二医院)妇产科南京210000 南京中医药大学附属南京医院(南京市第二医院)重症医学科南京210000

目的分析慢性HBV感染的危重孕产妇临床特点及其转归,为救治危重孕产妇和防治肝病重症化提供临床经验。方法选取2013年3月—2023年3月南京市第二医院重症医学科收治的慢性HBV感染的孕产妇41例,通过医院电子病历系统收集孕产妇的临床资料... 详细信息

目的分析慢性HBV感染的危重孕产妇临床特点及其转归,为救治危重孕产妇和防治肝病重症化提供临床经验。方法选取2013年3月—2023年3月南京市第二医院重症医学科收治的慢性HBV感染的孕产妇41例,通过医院电子病历系统收集孕产妇的临床资料,总结乙型肝炎孕产妇转入ICU的主要原因、死亡原因、治疗情况等。正态分布的计量资料两组间比较采用成组t检验;非正态分布的计量资料两组间比较采用Mann-Whitney U检验。计数资料两组间比较采用χ^(2)检验。结果13例(31.71%)患者未正规产检,8例(19.51%)高病毒载量患者(HBV DNA≥2×10^(5)IU/mL)未接受抗病毒治疗。主要的分娩方式为剖宫产32例(78.05%),婴儿早产23例(56.10%),患者死亡5例(12.20%)。转入ICU的前3位病因分别为肝衰竭、产后大出血和妊娠高血压疾病。肝衰竭主要在孕晚期发病,最多见并发症为肝性脑病(28.57%),最多见合并症为妊娠期肝内胆汁淤积症(21.43%);6例(42.86%)产检规律;13例(92.86%)入院前未接受抗病毒治疗。产后大出血患者平均ICU住院时间为(3.31±1.65)d,其中合并重症肝病者分娩前出现凝血功能异常,治疗48 h仍难以纠正。结论慢性HBV感染的孕产妇病情复杂,病死率较高。评估肝脏状态、定期产检和及时行抗病毒治疗对减少慢性HBV孕产妇重症发病、降低病死率尤为重要。

关键词：乙型肝炎病毒孕妇症状和体征

维普期刊数据库博看期刊

Liver injury in COVID-19:Holds ferritinophagy-mediated ferroptosis accountable

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第36期10卷 13148-13156页

作者： Feng-ju Jia Jing han School of Nursing Qingdao UniversityQingdao 266071Shandong ProvinceChina

Even in patients without a history of liver disease,liver injury caused by coronavirus disease 2019(COVID-19)is gradually becoming more ***,the precise pathophysiological mechanisms behind COVID-19’s liver pathogenicity are still not fully *** hypothesize that inflammation may become worse by cytokine storms caused by the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)*** ferritin levels can initiate ferritinophagy mediated by nuclear receptor coactivator 4(NCOA4),which leads to iron elevation,and *** COVID-19 patients,ferroptosis can be restricted to reduce disease severity and liver damage by targeting NCOA4-mediated *** confirm the role of ferritinophagy-mediated ferroptosis in SARS-CoV-2 infection,further research is required.

关键词： COVID-19 Liver injury Ferritinophagy Ferroptosis Iron SARS-CoV-2

Effectiveness of sensory integration therapy in children,focusing on Korean children:A systematic review and meta-analysis

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第7期12卷 1260-1271页

作者： Seri Oh Jong-Sik Jang A-Ra Jeon Geonwoo kim Mihwa Kwon Bahoe Cho Narae Lee Department of Occupational Therapy Kangwon National University Graduate SchoolSamcheok 25949South Korea Department of Occupational Therapy Kangwon National UniversitySamcheok 25949South Korea Department of Occupational Therapy Ju-Ju Children Development CenterNonsansi 32985Chungcheongnam-doSouth Korea Department of Occupation Therapy Suwon Women’s UniversityGyeonggi-do 16632South Korea Hijam Center for Development of Children Ochang 28117South Korea Department of Occupational Therapy U1 UniversityChung-cheong bukdo 25949South Korea

BACKGROUND Sensory integration intervention is highly related to the child's effective interaction with the environment and the child's ***,various sensory integration interventions are being applied,but research methodological problems are arising due to unsystematic *** study aims to present the optimal intervention protocol by presenting scientific standards for sensory integration intervention through *** To prove the effectiveness of sensory integration therapy,examine the latest trend of sensory integration studies in Korea,and provide clinical evidence for sensory integration *** The database of Korean search engines,including RISS,KISS,and DBpia,was used to search for related literature published from 2001 to October *** keywords,“Children”,“Sensory integration”,“Integrated sensory”,“Sensorymotor”,and“Sensory stimulation”were used in this ***,a meta-analysis was conducted on 24 selected studiesRISS,KISS,and DBpia,was used to search for related literature published from 2001 to October *** keywords,“Children”,“Sensory integration”,“Integrated sensory”,“Sensorymotor”,and“Sensory stimulation”were used in this ***,a meta-analysis was conducted on 24 selected *** Sensory integration intervention has been proven effective in children with cerebral palsy,autism spectrum disorder,attention deficit/hyperactivity disorder,developmental disorder,and intellectual disability in relation to the diagnosis of *** sensory integration therapies,1:1 individual treatment with a therapist or a therapy session lasting for 40 min was most *** terms of dependent variables,sensory integration therapy effectively promoted social skills,adaptive behavior,sensory processing,and gross motor and fine motor *** The results of this study may be used as therapeutic evidence for sensory integration intervention in the clinical field of occupational therapy for

关键词： Children Meta-analysis Occupational therapy Sensory integration Sensory processing Social skills

Characteristics of carbonatites from the northern part of the Korean Peninsula: A perspective from distribution, geology and geochemistry

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geoscience Frontiers 2021年第1期12卷 173-181页

作者： Jinkon ju Yunsong kim Mansik Gang School of Resource and Exploration Engineering Kim Chaek University of TechnologyPyongyangNorth Korea Central Survey Group of Mineral Resources PyongsongNorth Korea

The present study introduces the carbonatite in the northern part of the Korean Peninsula for the first *** exploration and development of the phosphorus-bearing carbonate rocks in the area have accumulated new geological data which gave us an opportunity to study origin of the carbonate *** conducted geological survey,geochemical analyses of trace elements and rare earth elements,and carbon and oxygen isotope analyses for the carbonatites from Ssangryong,Pungnyon,Yongyu and Puhung districts of the northern part of the Korean *** research confirms that the phosphorus-bearing carbonate rocks are carbonatite originating from the *** studied carbonatites are distributed at the junctions of ring and linear structures or around their margins and contain a greater amount of REEs,Y,and Sr than carbonate *** carbonatites in Yongyu and Puhung area show evidence that they were formed from mantle plume generated at the lower mantle and display similar fractionation characteristics to carbonatites in Barrado Itapirapua in Brazil and Kalkfeld and Ondurakorume in *** patterns of the carbonatites are typical of carbonatites and the carbon and oxygen isotope analyses demonstrate that the carbonatites were originated from *** carbonatites from the northern part of the Korean Peninsula have a great potential for sources of REE,Y,PGE(platinum group elements),copper,and gold.

关键词： Carbonatite Rare-earth elements Stable isotope composition Phoscorite Platinum group elements Korean Peninsula

New Method for Monitoring Tire Pressure of Cars Based on the Tire Radial Deformation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2010年第2期23卷 180-184页

作者： han Zongqi WANG Liqiang LIU Quanyou ju Xuekun Vehicle and Energy College Yanshan University Qinhuangdao 066004 China State Key Laboratory of Automobile Safety and Energy Tsinghua University Beijing 100084 China

Monitoring tire pressure of cars and signaling abnormal conditions is an important means to prevent deadly accidents. Large achievements have been gained, especially in direct tire pressure monitoring system（TPMS）. But there has been rarely research on indirect TPMS in the world. In China, the research on indirect TPMS is almost lacking. The international research on the indirect monitoring tire pressure method is mainly based on measuring and comparing the rotating speed of wheels. But it is very difficult to measure wheel rotating speed accurately because of the influence of many random factors. In this paper, the authors propose a new method in which the tire pressure can be monitored indirectly. This method can be used for tire calibration, wheel speed frequency standardization, wheel speed frequency comparison, and abnormal tire pressure determination. The pulse frequencies from wheel speed sensors of ABS are used to indicate tire deformation. Because the frequency has a relationship with tire deformation, the tire deformation reflects the tire pressure. Small sample statistics is used in the new method to increase the accuracy, and the experimental samples using the principle of the new method have been made and tested. The result of vehicle tests on road demonstrates that the method is efficient and accurate to monitor tire pressure. The research has positive potential for developing products.

关键词： tire pressure monitoring system tire radial deformation pulse frequency alarms

Microstructure and texture evolution of Ti-Nb-Si based alloys for biomedical applications

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2006年第Z2期25卷 163-167页

作者： kim Won-Yong kim han-Sol Advanced Materials R&D Division Korea Institute of Industrial Technology Incheon 406-130 Korea

Microstructure and texture of Ti-Nb-Si based alloys, prepared by water quenching from β-phase field, cold rolling and recrystallization heat treatment followed by water quenching, were investigated in terms of optical microstructure and analysis of X-ray pole figure result. In as-quenched sample, relatively random distribution of pole figure was detected without showing a specific texture component. In as-cold rolled sample, however, it is found well-developed several texture components consisting of rotated cube, α-fiber and γ-fiber texture components which are frequently observed in bcc-structured metals and alloys were found. Therefore, texture components developed in the present alloys are closely related to the deformation of β-phase even though small amount of α″ phase co-exist in the microstructure. In recrystallized sample, α-fiber texture component is weakly detected while the other texture components, rotated cube and γ-fiber components, appears to be relatively unchanged. No additional texture components were detected besides those texture components observed in the cold rolled samples.

关键词： Ti-Nb-Si based alloys microstructure texture

Numerical Investigation on Wet Steam Non-equilibrium Condensation Flow in Turbine Cascade

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2012年第6期21卷 525-532页

作者： ju Feng-ming YAN Pei-gang han Wan-jin School of Energy Science & Engineering Harbin Institute of Technology Harbin 150001 China

Based on the two-phase wet steam flow with spontaneous condensation, experimental verification and flow analysis on nozzle and 2D cascade are carried out. The 3D Reynolds-Averaged gas-liquid two-phase flow control equation solver is explored with k-e-kp turbulence model. Furthermore, 3D flow numerical simulation on the last stage stator of the steam turbine is carried out. The results show that a sudden pressure rise on blade suction surface is mainly caused by the droplet growth in condensation flow. The more backward the condensation position is in cascade passage, the less the sudden pressure rise from condensation is, and the larger the nucleation rate is, the maximum under-cooling and the number of droplets per unit volume are. Interaction of condensation wave and shock wave has imposed greater influence on the parameters of the blade cascade outlet.

关键词： turbine cascade wet steam non-equilibrium condensation two-phase flow

A novel electrospinning method for self-assembled tree-like fibrous scaffolds:Microenvironment-associated regulation of MSC behavior and bone regeneration

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第20期115卷 52-70页

作者： Jeong In kim ju Yeon kim Sung-Ho Kook Jeong-Chae Lee Cluster for Craniofacial Development and Regeneration Research Institute of Oral Biosciences and School of DentistryJeonbuk National UniversityJeonju 54896Republic of Korea Department of Bionanosystem Engineering Jeonbuk National UniversityJeonju 54896Republic of Korea Department of Bioactive Material Sciences Research Center of Bioactive MaterialsJeonbuk National UniversityJeonju 54896Republic of Korea

Numerous studies highlight advantages of electrospun scaffolds in bone tissue engineering,in which cellular behavior is tightly affected by fiber topographical cues of ***,the classic electrospinning setup limits a desired presentation of biomimetic fibrous microenvironments that sense mechanosignaling and regulate stem cell *** aims of this study were to fabricate advanced asspun scaffolds presenting tree-like microfiber/nanonet networks and to evaluate their regulatory potentials on behavior of human mesenchymal stem cells(h MSCs)and bone *** we developed a novel electrospinning setup that allowed the presentation of patterned Trunk microfibers(TMF)and/or branched nanonet fibers(BNn Fs)in biomimetic fibrous *** the cellular mechanisms,anisotropichierarchical topography of TMF controlled behavior of h MSCs through focal adhesion formation and Yesassociated protein(YAP)induction,whereas BNn F disturbed such mechanosensing responses in the *** fiber microenvironment-related expression and nuclear localization of YAP *** correlated with the potentials of as-spun scaffolds to enhance osteogenic differentiation of the h MSCs and alveolar bone defect healing in an animal ***,this study provides an advanced approach of the modified electrospinning setup for presentation of biomimetic fibrillar microenvironments in as-spun scaffolds along with their application in stem cell behavior regulation and regenerative tissue engineering.

关键词： Electrospinning Advanced biomimetic scaffolds Stem cell behavior Mechanosensing Bone tissue engineering