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Electromagnetic induction in a conducting D" layer-Ⅰ:Effects of boundary charge accumulation and the boundary conditions

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Geodesy and Geodynamics 2019年第3期10卷 187-195页

作者： ming fang Xinhao Liao Department of EAPS Massachusetts Institute of TechnologyCambraidge MA02139USA Shanghai Observatory Chinese Academy of SciencesShanghai200030China

In response to the primary electric field originated by the fluid-core-dynamo, electric charges accumulate at the boundaries of a solid conducting D″ layer due to the poor circuitry conditions until the irrotational primary electric field is neutralized. The neutralization undoes the internal induction excited by the primary electric field and, as a result, eliminates the secondary toroidal magnetic field inside the D″. The primary magnetic field generated by the fluid-core-dynamo gives rise to a sustainable secondary poloidal magnetic field inside the conducting D″ layer. We introduce the general kinematic boundary conditions that are valid with different induction processes and parameter jumps across the core mantle *** find by dimensional analysis that the strength of the secondary poloidal magnetic field is much weaker, by a factor of ~10-2, than the irrotational primary. These findings indicate that the D' is in effect an insulator for the geodynamo regardless of its material composition. Any mechanism for the coremantle magnetic coupling should take this fact into consideration.

关键词： D' layer Magnetic induction Boundary conditions

A novel method for evaluating brain function and microstructural changes in Parkinson's disease

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Neural Regeneration Research 2015年第12期10卷 2025-2032页

作者： ming-fang Jiang Feng Shi Guang-ming Niu Sheng-hui Xie Sheng-yuan Yu Department of Neurology General Hospital of PLA Department of Radiology Inner Mongolia Autonomous Region Hospital of Traditional Chinese Medicine Department of Radiology the Affiliated Hospital of Inner Mongolia University

In this study,microstructural brain damage in Parkinson＇s disease patients was examined using diffusion tensor imaging and tract-based spatial *** analyses revealed the presence of neuronal damage in the substantia nigra and putamen in the Parkinson＇s disease ***,disease symptoms worsened with increasing damage to the substantia nigra,confirming that the substantia nigra and basal ganglia are the main structures affected in Parkinson＇s *** also found that microstructural damage to the putamen,caudate nucleus and frontal lobe positively correlated with *** on the tract-based spatial statistics,various white matter tracts appeared to have microstructural damage,and this correlated with cognitive disorder and *** together,our results suggest that diffusion tensor imaging and tract-based spatial statistics can be used to effectively study brain function and microstructural changes in patients with Parkinson＇s *** novel findings should contribute to our understanding of the histopathological basis of cognitive dysfunction and depression in Parkinson＇s disease.

关键词： nerve regeneration Parkinson's disease cognitive dysfunction depression functionalmagnetic resonance imaging diffusion tensor imaging tract-based spatial statistical analysis basalganglia substantia nigra neural regeneration

Efficient molecular model for squeeze-film damping in rarefied air

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Chinese Physics B 2019年第9期28卷 367-372页

作者： Cun-Hao Lu Pu Li Yu-ming fang School of Mechanical Engineering Southeast UniversityNanjing 211100China College of Electronic Science and Engineering Nanjing University of Posts and TelecommunicationsNanjing 211100China

Based on the energy transfer model(ETM) proposed by Bao et *** the Monte Carlo(MC) model proposed by Hutcherson and Ye, this paper proposes an efficient molecular model(MC-S) for squeeze-film damping(SQFD) in rarefied air by releasing the assumption of constant molecular velocity in the *** with the experiment data, the MC-S model is more efficient than the MC model and more accurate than ***, by using the MC-S model, the feasibility of the empirical model proposed by Sumali for SQFD of different plate sizes is *** is proved that, for various plate sizes, the accuracy of the empirical model is relatively *** last, the SQFD of various vibration frequencies is discussed, and it shows that, for low vibration frequency, the MC-S model is reduced to ETM.

关键词： micro-electro-mechanical system(MEMS) squeeze-film air damping rarefied air molecular model

THE ROLE FORE AIR FLOW IN SOIL SLOPE STABILITY ANALYSIS

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Journal of Hydrodynamics 2009年第5期21卷 640-646页

作者： ZHANG Xiao-yue ZHU Yue-ming fang Chun-hui College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China

In order to investigate the effect of the pore air flow in the soil slope stability analysis, a water-air two-phase flow model, based on the multi-phase flow theory, is proposed and with the model, the water-phase and air-phase seepages of the soil slope in the stable seepage and rainfall situations are simulated. The soil slope safety coefficients are obtained according to the simulated pore air pressure and pore water pressure. The calculation results show that in the stable seepage situation, the influence of the pore air pressure on the soil slope stability can be neglected, while in the rainfall situation, the pore air pressure generated in the unsaturated zone will reduce the safety coefficient, and the larger the distance between the slip surface and the underground water level is, the greater the influence of the pore air pressure on the soil slope stability will be.

关键词： unsaturated soil water-air two-phase flow rainfall slope stability

分阶段护理干预对慢性阻塞性肺疾病合并呼吸衰竭患者肺功能及血气指标的影响

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四川解剖学杂志 2024年第4期32卷 188-191页

作者：赵旦旦张玉辉明芳信阳市传染病医院呼吸内科信阳464000

目的:探讨分阶段护理干预对慢性阻塞性肺疾病(COPD)合并呼吸衰竭患者心理状况及肺功能的影响.方法:选取本院2021年3月至2022年9月期间收治的75例COPD合并呼吸衰竭患者作为研究对象,采用随机数字表法,将其分为实验组(n=38,予以分阶段护... 详细信息

目的:探讨分阶段护理干预对慢性阻塞性肺疾病(COPD)合并呼吸衰竭患者心理状况及肺功能的影响.方法:选取本院2021年3月至2022年9月期间收治的75例COPD合并呼吸衰竭患者作为研究对象,采用随机数字表法,将其分为实验组(n=38,予以分阶段护理干预)和常规组(n=37,予以常规护理干预).比较两组患者干预前后心理状况、肺功能、生活质量、康复进程(住院时间、通气时间)及并发症发生情况.结果:干预后,实验组患者心理状况、生活质量均优于常规组,肺功能高于对照组,差异具有统计学意义(P<0.05);实验组患者住院时间、通气时间均短于常规组,差异具有统计学意义(P<0.05);实验组患者并发症发生率(2/38,5.26%)低于常规组(9/37,24.32%),差异具有统计学意义(P<0.05).结论:分阶段护理干预可促进COPD合并呼吸衰竭患者心理健康,改善其肺功能,提高其生活质量,促进康复.

关键词：加速康复外科理念慢性阻塞性肺疾病呼吸衰竭心理状况肺功能

Clinical significance of half-hepatic blood flow occlusion technology in patients with hepatocellular carcinoma with cirrhosis

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World Journal of Clinical Cases 2022年第24期10卷 8547-8555页

作者： Dong Liu Jian-ming fang Xian-Qi Chen Department of General Surgery Yongkang First People’s Hospital of Zhejiang ProvinceYongkang 321300Zhejiang ProvinceChina Department of Hepatopancreatobiliary Surgery Jinhua Guangfu Oncology HospitalJinhua 321000Zhejiang ProvinceChina

BACKGROUND Most patients with primary hepatocellular carcinoma(HCC)have a history of chronic hepatitis B and usually present with varying degrees of *** to the special nature of liver anatomy,the blood vessel wall in the liver parenchyma is thin and prone to *** bleeding and blood transfusion during hepatectomy are independent risk factors for liver cancer recurrence and *** clinical methods have been used to reduce intraoperative bleeding,and the Pringle method is most widely used to prevent blood flow to the *** To investigate the effect of half-hepatic blood flow occlusion after patients with HCC and cirrhosis undergo *** This retrospective study included 88 patients with HCC and liver cirrhosis who underwent hepatectomy in our hospital from January 2017 to September *** were divided into two groups based on the following treatment methods:the research group(n=44),treated with half-hepatic blood flow occlusion technology and the control group(n=44),treated with total hepatic *** in operation procedure,blood transfusion,liver function,tumor markers,serum inflammatory response,and incidence of surgical complications were compared between the *** The operation lasted longer in the research group than in the control group(273.0±24.8 min vs 256.3±28.5 min,P0.05).Before surgery,there were no significant differences in serum alanine transaminase(ALT),aspartate aminotransferase(AST),total bilirubin,and prealbumin levels between the research and control groups(P>0.05).Conversely,24 and 72 h after the operation the respective serum ALT(378.61±77.4

关键词： Hepatocirrhosis Hepatocellular carcinoma Hepatectomy Hepatic occlusion Liver function

Development and Validation of a Prediction Model on Adult Emergency Department Patients for Early Identification of Fulminant Myocarditis

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Current Medical Science 2023年第5期43卷 961-969页

作者： Min JIANG Jian KE ming-hao fang Su-fang HUANG Yuan-yuan LI Department of Emergency Medicine Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Objective It is difficult to predict fulminant myocarditis at an early stage in the emergency *** objective of this study was to construct and validate a simple prediction model for the early identification of fulminant *** A total of 61 patients with fulminant myocarditis and 160 patients with acute myocarditis were enrolled in the training and internal validation *** regression and multivariate logistic regression were selected to develop the prediction *** selection of the model was based on overall performance and simplicity.A nomogram based on the optimal model was built,and its clinical usefulness was evaluated by decision curve *** predictive model was further validated in an external validation *** The resulting prediction model was based on 4 factors:systolic blood pressure,troponin I,left ventricular ejection fraction,and ventricular wall motion *** Brier scores of the final model were 0.078 in the training data set and 0.061 in the internal testing data set,*** C-indexes of the training data set and the testing data set were 0.952 and 0.968,*** curve analysis showed that the nomogram model developed based on the 4 predictors above had a positive net benefit for predicting probability *** the external validation cohort,the model also showed good performance(Brier score=0.007,and C-index=0.989).Conclusion We developed and validated an early prediction model consisting of 4 clinical factors(systolic blood pressure,troponin I,left ventricular ejection fraction,and ventricular wall motion abnormality)to identify potential fulminant myocarditis patients in the emergency department.

关键词： fulminant myocarditis emergency risk prediction nomogram

手术室高值耗材智能精细化管理平台的构建与应用

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中国医疗器械信息 2024年第8期30卷 151-153页

作者：黄书云倪姜薛明芳福建省福清市医院手术室福建福清350300 福清市中医院护理部福建福清350300

目的:基于精细化管理模式下,探讨手术室高值耗材智能管理平台的构建,以及平台在管理耗材方面的应用效果。方法:以本院高值耗材智能精细化管理实施前(2022年4月~6月)及实施后(2023年4月~6月)期间手术室耗材管理作为参照,通过使用医院综... 详细信息

目的:基于精细化管理模式下,探讨手术室高值耗材智能管理平台的构建,以及平台在管理耗材方面的应用效果。方法:以本院高值耗材智能精细化管理实施前(2022年4月~6月)及实施后(2023年4月~6月)期间手术室耗材管理作为参照,通过使用医院综合运营管理平台(Hospital Resource Planning Platform,HRP)系统结合医疗器械唯一标识(Unique Device Identification,UDI)和条形码技术开展二级库管理,比较平台构建前后高值耗材的管理效率及手术室护士的工作效率与满意度。结果:平台构建后的高值耗材管理效果明显优于构建前,管理时长显著减少,且具有统计学意义(P<0.05)。平台构建后手术室护士进行高值耗材管理期间的工作效率优于构建前,巡回护士外出次数显著降低(P<0.05)。耗材管理相关不良事件发生率显著降低,尤其是串收率降低为0;医护人员总满意度大幅提升(P<0.05)。结论:在手术室高值耗材管理期间,精细化管理模式的使用不仅能够提升手术室护士工作效率和医务人员满意度,同时也能够改善高值耗材的使用情况,值得在手术室高值耗材管理积极运用。

关键词：手术室高值耗材 UDI 二级库智能平台

A New Humidity-Sensitive Material Based on PPBT Prepared with Palladium Complex Catalyst

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Chinese Chemical Letters 2000年第12期11卷 1097-1100页

作者： Hong Mei SUN Mu Jie YANG ming fang LING Department of Chemistry and Chemical Engineering Suzhou UniversitySuzhou 215006 Department of Polymer Science and Engineering Zhejiang UniversityHangzhou 310027 Department of Information and Electronics Zhejiang UniversityHangzhou 310027

Soluble Poly(propargyl benzoate) (PPBT) with pi -conjugated structure was synthesized using a novel bis(triphenylphosphine)-bisacetylide palladium complex catalyst [Pd(PPh3)(2)(C equivalent to CCH2OOCPh)(2)] (PPB). An interdigital gold electrode was covered by screen printing films of doped PPBT (DPPBT) to prepare a resistance-type humidity sensor, which exhibits electrical response towards relative humidity (RH%) variations in the range 11%-96%. PPBT shows promise as a new humidity-sensitive material.

关键词： humidity-sensitive materials poly(propargyl benzoate) bis(triphenylphosphine)-bis-acetylide palladium complex resistance-type humidity sensor