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Imaging atmospheric turbulence,using entropy to quantify turbulence strength

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Research in Astronomy and Astrophysics 2020年第11期20卷 259-262页

作者： Lu Feng Zhi-Xia Shen jing-yao Hu National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

Vertical profile of turbulence strength(Cn2)is one of the most important attributes for evaluating a site’s astronomical *** seeing is commonly used for describing turbulence strength,it can only represent the integral of all layers of the turbulence above the *** techniques which can be applied to produce Cn2,such as DIMM-MASS,SCIDAR,etc.,all rely on rather complex systems to do the *** this paper,we present an idea to evaluate the relative strength of turbulence with entropies of short exposure images taken at different conjugated heights of the *** experimental results are also presented in the paper.

关键词： techniques telescope site testing

EXPERIMENTAL AND NUMERICAL INVESTIGATIONS ON HORIZONTAL OIL-GAS FLOW

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Journal of Hydrodynamics 2007年第6期19卷 683-689页

作者： LU Guang-yao WANG jing JIA Zhi-hai School of Mechanical Engineering Shanghai Jiaotong University Shanghai 200240 China

Experiments were carried out to investigate the characteristics of oil-gas flow in a horizontal pipe on a large scale （with the inner diameter D = 125 mm）. With the experimental data, the flow patterns were presented. Through the analyses for the flow regime transition, it was found that there was a critical superficial velocity of liquid phase for the flow regime transiting from stratified flow to slug flow. The slug flow could not occur until the superficial velocity of liquid phase was higher than the critical velocity. For the flow pattern transiting from stratified to slug flow, the transmitting velocity of gas phase decreases with the augmentation of superficial velocity of liquid phase. On the basis of the experiments, numerical simulations of different flow patterns and their transitions were performed with the use of the Volume Of Fluid （VOF） technique. The results of the computations are shown to match well with the measured data in the experiments.

关键词： oil-gas flow horizontal pipe large diameter Volume Of Fluid (VOF) technique flow pattern

Coordination control for crankshaft forging hydraulic press

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High Technology Letters 2019年第4期25卷 452-460页

作者： yao jing[[ Li yao Cao Xiaoming Sha Tong College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004P.R.China The Laboratory of Heavy Machinery Fluid Power Transmission and Control in Hebei Yanshan UniversityQinhuangdao 066004P.R.China The State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310058P.R.China

Taking a new type of full-fiber crankshaft forging hydraulic press as the research object,an upsetting-bending stroke coordination control is studied to improve crankshaft forming accuracy.A master-slave proportion integration differentiation(PID)coordination control strategy based on velocity feed-forward is proposed to improve the coordination control *** structure and working process of the full-fiber crankshaft forging hydraulic press are introduced,and a mathematical model of the upsetting and bending control system are *** coordination control strategy is verified *** experimental results show that the maximum tracking error of the coordination control strategy is reduced by 66%compared with the traditional PID controller,and the coordination motion accuracy is improved effectively.

关键词： coordination shaft bending

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微污染水源大型给水厂工程设计

工程建设与设计 2024年第12期 87-89页

作者：邳竞尧张晓霞中国市政工程华北设计研究总院有限公司天津300381

针对某给水厂的水源为微污染水的问题,论文分析原水水质中的主要污染因子及低温低浊的现状。通过参考已运行的一期工程的工艺流程,并考虑针对低温低浊水质特点的工程措施,该项目二期工程采用处理工艺为“预臭氧+生物预处理+常规处理+臭... 详细信息

针对某给水厂的水源为微污染水的问题,论文分析原水水质中的主要污染因子及低温低浊的现状。通过参考已运行的一期工程的工艺流程,并考虑针对低温低浊水质特点的工程措施,该项目二期工程采用处理工艺为“预臭氧+生物预处理+常规处理+臭氧生物活性炭+消毒”的方法。结果表明:该工艺充分考虑了原水特性,适用于微污染水源的大型给水厂,可保证出水水质达标。

关键词：大型给水厂微污染水源低温低浊

Impact of binocular visual field loss on driving performance in glaucoma patients

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International Journal of Ophthalmology(English edition) 2021年第1期14卷 112-119页

作者： Zhen-Ying Jiang jing Chen jing yao Shao-Hong Qian Eye Institute and Department of Ophthalmology Eye&ENT HospitalFudan UniversityShanghai 200031China NHC Key Laboratory of Myopia(Fudan University) Key Laboratory of MyopiaChinese Academy of Medical Sciences and Shanghai Key Laboratory of Visual Impairment and RestorationShanghai 200031China Faculty of Arts and Science New York University ShanghaiShanghai 200122China NYU-ECNU Institute of Brain and Cognitive Science at New York University Shanghai Shanghai 200122China

AIM:To evaluate the driving performance in young and middle-aged Chinese glaucoma patients with mild to severe visual field loss compared to those without glaucoma by using a driving simulation ***:Twenty-nine participants were included in this study:nine patients with glaucoma but pass the binocular Esterman visual field test,ten patients with glaucoma and fail the binocular Esterman visual field test,and ten age-matched healthy controls.A driving simulation test was designed as a frequency-based analysis of a lanekeeping *** total performance error,the controlresponse amplitude and delay were ***:Esterman visual field test fail group showed the longest delay of control-response among three groups(P=0.02).And the delay in lane-keeping task was significantly associated with inferior field of better-eye(r=0.51,P=0.004)and integrated visual field(r=0.55,P=0.002).CONCLUSION:Young and middle-aged glaucoma patients with binocular visual field loss suffered from a longer delay of response in driving simulation test,while inferior visual field having more impact than superior visual field.

关键词： driving simulation binocular visual field loss glaucoma young middle-aged

反刍性沉思在意外创伤患者创伤后成长与领悟社会支持之间的中介效应

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临床医学研究与实践 2024年第22期9卷 76-79,133页

作者：刘改梅赖海静姚静西安市第九医院陕西西安710054

目的分析反刍性沉思在意外创伤患者创伤后成长(PTG)与领悟社会支持之间的中介效应。方法使用一般资料调查表、中文版创伤后成长评定量表(PTGI)、事件相关反刍性沉思问卷(ERRI)与领悟社会支持量表(PSSS)对西安市3所三级甲等综合性医院骨... 详细信息

目的分析反刍性沉思在意外创伤患者创伤后成长(PTG)与领悟社会支持之间的中介效应。方法使用一般资料调查表、中文版创伤后成长评定量表(PTGI)、事件相关反刍性沉思问卷(ERRI)与领悟社会支持量表(PSSS)对西安市3所三级甲等综合性医院骨科住院的208例意外创伤住院患者进行调查,采用Pearson相关性分析探讨PTG与反刍性沉思、领悟社会支持之间的关系。结果意外创伤患者的PTGI总分及各维度得分与PSSS总分及各维度得分均呈正相关(P<0.01);PTGI总分及各维度得分与ERRI总分及目的性反刍性沉思维度得分均呈正相关(P<0.01),与侵入性反刍性沉思维度得分呈负相关(P<0.05)。反刍性沉思在意外创伤患者的领悟社会支持与PTG间起部分中介作用,中介效应占比为89.55%。结论反刍性沉思在意外创伤患者的领悟社会支持与PTG间起部分中介作用,医护人员应关注和引导患者的反刍性沉思顺利过渡,从而促使患者伤后成长。

关键词：意外创伤创伤后成长反刍性沉思领悟社会支持中介效应

规范ICU多重耐药菌感染病人接触隔离的循证护理实践

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循证护理 2024年第13期10卷 2316-2322页

作者：荆瑶刘丹蒋卓娟彭飞上海长征医院上海200003

目的:提高重症监护病房(ICU)医护人员接触隔离管理水平及最佳证据执行能力,降低ICU多重耐药菌医院感染发生率。方法:运用循证护理方法获取最佳证据,制定多重耐药菌感染病人接触隔离管理审查指标并用于临床进行持续质量改进,比较证据应... 详细信息

目的:提高重症监护病房(ICU)医护人员接触隔离管理水平及最佳证据执行能力,降低ICU多重耐药菌医院感染发生率。方法:运用循证护理方法获取最佳证据,制定多重耐药菌感染病人接触隔离管理审查指标并用于临床进行持续质量改进,比较证据应用前后ICU多重耐药菌医院感染发生率、医护人员对多重耐药菌感染病人接触隔离相关知识知晓情况及执行情况。结果:本研究形成21条质量审查指标,应用最佳证据后,ICU医护人员多重耐药菌接触隔离理论知识评分由(73.49±6.50)分提高到(92.88±6.27)分;接触隔离措施依从性大幅提升,13条审查指标执行率提升至88%以上,差异均有统计学意义(P<0.05),ICU多重耐药菌医院感染率从3.2%降低至1.9%。结论:将基于循证的最佳证据应用于临床,有助于推进ICU多重耐药菌感染病人接触隔离管控措施落实,提升医护人员理论知识及实践水平,降低ICU多重耐药菌医院感染发生率。

关键词：多重耐药菌接触隔离循证护理重症监护病房

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基于改进U-Net的髋关节关键点检测算法

计算机与现代化 2024年第2期 15-19,28页

作者：陈震姚京辉苏成悦广东工业大学物理与光电工程学院广东广州510006 南方医科大学第三附属医院广东广州510630

使用骨盆X光片诊断发育性髋关节发育不良(Developmental Dysplasia of the Hip,DDH)要求准确地标注髋关节关键点,而深度学习方法能作为可靠的辅助工具。针对骨盆片拍摄姿势和拍摄距离多样化问题,本文基于U-Net提出了RKD-UNet来检测髋关... 详细信息

使用骨盆X光片诊断发育性髋关节发育不良(Developmental Dysplasia of the Hip,DDH)要求准确地标注髋关节关键点,而深度学习方法能作为可靠的辅助工具。针对骨盆片拍摄姿势和拍摄距离多样化问题,本文基于U-Net提出了RKD-UNet来检测髋关节关键点。该模型使用残差块改进U-Net的卷积层和skip-connection路径,并将坐标注意力引入到编码器中以增强模型对关键点邻域的特征提取能力。在编码器顶部使用卷积和ASPP模块构成Bridge块,以[3,6,9]的空洞率融合不同尺度的特征信息并提升模型的感受野。本文使用包含骨盆正位片、蛙位片、下肢全长片和术后骨盆片的数据集训练和测试模型。RKD-UNet实现了3.19±2.19 px的平均关键点检测误差和2.83°±2.59°的平均髋臼角测量误差。对正常、轻度、中度和重度脱位案例诊断的F1分数分别达到89.6、77.1、57.9和94.1,高于医生的手动诊断结果。实验结果表明,RKD-UNet能准确检测髋关节关键点并辅助医生诊断DDH。

关键词：深度学习 U-Net 关键点检测发育性髋关节发育不良辅助诊断

Sphingosine-1-phosphate signal transducer and activator of transcription 3 signaling pathway contributes to baicalein-mediated inhibition of dextran sulfate sodium-induced experimental colitis in mice

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Chinese Medical Journal 2020年第3期133卷 292-300页

作者： jing yao Tao Liu Rui-Jiao Chen jing Liang Jun Li Chuan-Gong Wang Department of Pharmacology School of Basic MedicineJining Medical UniversityJiningShandong 272000China Department of Otorhinolaryngology Affiliated Hospital of Jining Medical UniversityJiningShandong 272000China Department of Chemistry School of Basic MedicineJining Medical UniversityJiningShandong 272000China School of Life Sciences Qufu Normal UniversityQufuShandong 273100China.

Background:Baicalein has been shown to have anti-inflammatory and anti-tumor ***,the mechanisms underlying its anti-inflammatory effect on colitis remain ***:A dextran sodium sulfate(DSS)-induced model of acute colitis was established in BALB/c mice(6-8 weeks old,weighing 18-22 g).Six groups of mice received:(1)water for 10 days(control),n=6;(2)DSS 4%solution in the drinking water for 7 days,followed by normal water for 3 days,n=7;(3),(4),and(5)as for group 2 plus baicalein(10,20,40 mg/kg)administered once daily starting on day 1,n=6;and(6)as for(2)plus 5-aminosalicylic acid(50 mg/kg)administered once daily starting on day 1,n=*** weights,stool consistency,and hematochezia were recorded,and the severity of colitis was evaluated using a disease activity *** day 11,the mice were euthanized,and organs and blood were collected for *** inflammatory factors were detected by enzyme-linked immunosorbent assay;CD11b-positive cells were analyzed by immunofluorescence microscopy;expression of retinoic-acid-receptor-related orphan nuclear receptor gamma,sphingosine kinase 1(SPHK1),and phosphorylated signal transducer and activator of transcription 3(p-STAT3)was detected by immunohistochemistry;and expression of nucleotide-binding oligomerization domain 2(NOD2),SPHK1,sphingosine 1-phosphate receptor 1(S1PR1),total STAT3,and p-STAT3 were detected by western blotting ***-group differences were compared using Student’s t ***:Baicalein treatment dose-dependently reduced DSS-induced weight loss(P<0.01 or P<0.05),splenomegaly(P<0.01),and colonic damage,as reflected by amelioration of diarrhea,rectal bleeding,and colonic ulceration,congestion,edema(shown as colon length,P<0.05 or P<0.01),and inflammatory cell *** also significantly decreased the levels of inflammatory mediators in the serum(P<0.01)and colon,and significantly inhibited expression of NOD2 SPHK1,S1PR1,and p-STAT3 in the colon(P<0.05).Conc

关键词： Baicalein Colitis STAT3 Sphingosine kinase 1