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冠心病PCI术后患者非罪犯血管进展的危险因素分析

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湖北医药学院学报 2024年第1期43卷 61-65,69页

作者：王淑莹董晓王治校党书毅十堰市太和医院·湖北医药学院附属医院心内科湖北十堰442000

目的:分析影响冠状动脉粥样硬化性心脏病经皮冠状动脉介入(PCI)术后非罪犯血管进展的相关因素。方法:收集2020年8月至2022年8月于十堰市太和医院心血管疾病诊疗中心行PCI治疗,并在至少间隔3个月以上复查冠脉造影(CAG)的171例患者,根据... 详细信息

目的:分析影响冠状动脉粥样硬化性心脏病经皮冠状动脉介入(PCI)术后非罪犯血管进展的相关因素。方法:收集2020年8月至2022年8月于十堰市太和医院心血管疾病诊疗中心行PCI治疗,并在至少间隔3个月以上复查冠脉造影(CAG)的171例患者,根据非罪犯血管是否进展分为对照组(n=72例)和进展组(n=99例),比较两组的基线临床资料[包括一般资料:年龄、性别、体重指数(BMI)、既往病史、吸烟史、服药情况等;实验室检查结果:白细胞(WBC)、C反应蛋白(CRP)、纤维蛋白原(FIB)、糖化血红蛋白(HbA1c)、血脂、脂蛋白[LP(a)]、血尿酸(SUA)、同型半胱氨酸(Hcy)及两次入院血脂和Hcy的差值(ΔHcy);术中冠脉造影情况],分析影响PCI术后非罪犯血管进展的相关因素。结果:2组在性别、年龄、BMI、高血压、糖尿病等方面差异无统计学意义(P>0.05),而吸烟史的差异有统计学意义(P1)差异具有统计学意义(P1个(OR=2.702,95%CI:1.036~7.058,P=0.047)有关。结论:吸烟史、Lp(a)、△Hcy、UA、HbA1c水平、植入支架个数>1是影响非罪犯血管进展的独立影响因素(P<0.05)。

关键词：非罪犯血管同型半胱氨酸尿酸脂蛋白

Investigation of shale gas microflow with the Lattice Boltzmann method

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Petroleum Science 2015年第1期12卷 96-103页

作者： xiao-Ling Zhang Li-zhi xiao Long Guo Qing-Ming Xie State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Key Laboratory of Shale Gas Exploration Ministry of Land and Resources Chongqing Institute of Geology and Mineral Resources

In contrast to conventional gas-bearing rocks, gas shale has extremely low permeability due to its nano- scale pore networks. Organic matter which is dispersed in the shale matrix makes gas flow characteristics more complex. The traditional Darcy＇s law is unable to estimate matrix permeability due to the particular flow mechanisms of shale gas. Transport mechanisms and influence factors are studied to describe gas transport in extremely tight shale. Then Lattice Boltzmann simulation is used to establish a way to estimate the matrix permeability numerically. The results show that net desorption, diffu- sion, and slip flow are very sensitive to the pore scale. Pore pressure also plays an important role in mass fluxes of gas. Temperature variations only cause small changes in mass fluxes. The Lattice Boltzmann method can be used to study the flow field in the micropore spaces and then provides numerical solutions even in complex pore structure models. Understanding the transport characteristics and establishing a way to estimate potential gas flow is very important to guide shale gas t＇eserve estimation and recovery schemes.

关键词： Shale gas Permeability Adsorption Desorption Diffusion Slip effect

Hydrogen induced cracking of X80 pipeline steel

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International Journal of Minerals,Metallurgy and Materials 2010年第5期17卷 579-586页

作者： Chao-fang Dong Kui xiao zhi-yong Liu Wen-jing Yang xiao-gang Li Corrosion and Protection Center University of Science and Technology Beijing Beijing 100083 China

The hydrogen-induced cracking （HIC） behavior of X80 pipeline steel was studied by means of electrochemical charging, hydrogen permeation tests, tension test, and scanning electron microscopy （SEM）. The experimental results indicate that the increase of charging time and charging current density or the decrease of the solution pH value leads to an increase of the hydrogen content in X80 steel, which plays a key role in the initiation and propagation of HIC. It is found that the majority of macro-inclusions within the as-used X80 steel do not constitute a direct threat to HIC except aluminum oxides, which directly or indirectly lead to HIC. The hydrogen trap density at room temperature is estimated to be pretty high, and this is an essential reason why the steel is sensitive to HIC. After hydrogen charging, the elongation loss rate and area reduction of X80 steel decline obviously, taking a noticeable sign of hydrogen-induced plasticity damages. It is demonstrated that the losses of these plastic parameters have a linear relation to the fracture size due to hydrogen.

关键词： pipeline steel hydrogen induced cracking electrochemical charging fracture

A General Law of Precise Asymptotics for Products of Sums under Dependence

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Acta Mathematica Sinica,English Series 2010年第1期26卷 107-116页

作者： Yong ZHANG xiao Yun YANG zhi Shan DONG College of Mathematics Jilin University Changchun 130012 P. R. China

Let {Xn,n ≥ 1} be a strictly stationary LNQD （LPQD） sequence of positive random variables with EX1 = μ 〉 0, and VarX1 = σ^2 〈 ∞. Denote by Sn = ∑i=1^n Xi and γ = σ/μ the coefficients of variation. In this paper, under some suitable conditions, we show that a general law of precise asymptotics for products of sums holds. It can describe the relations among the boundary function, weighted function, convergence rate and limit value in the study of complete convergence.

关键词： general law precise asymptotics products of sums NA (PA) LNQD (LPQD)

Diabetes Prediction Using Derived Features and Ensembling of Boosting Classifiers

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Computers, Materials & Continua 2022年第10期73卷 2013-2033页

作者： R.Rajkamal Anitha Karthi xiao-zhi Gao School of Computing SRM Institute of Science and TechnologyKattankulathurChennaiIndia School of Computing Bharat Institute of Higher Education and ResearchChennaiIndia School of Computing University of Eastern FinlandKuopioFinland

Diabetes is increasing commonly in people’s daily life and represents an extraordinary threat to human *** Learning(ML)in the healthcare industry has recently made *** ML models are developed around different datasets for diabetic *** is essential for ML models to predict diabetes *** informative features of the dataset are vital to determine the capability factors of the model in the prediction of *** engineering(FE)is the way of taking forward in yielding highly informative *** Indian Diabetes Dataset(PIDD)is used in this work,and the impact of informative features in ML models is experimented with and analyzed for the prediction of *** values(MV)and the effect of the imputation process in the data distribution of each feature are *** importance and partial dependence are carried out extensively and the results revealed that Glucose(GLUC),Body Mass Index(BMI),and Insulin(INS)are highly informative *** features are obtained for BMI and INS to add more information with its raw *** ensemble classifier with an ensemble of AdaBoost(AB)and XGBoost(XB)is considered for the impact analysis of the proposed FE *** ensemble model performs well for the inclusion of derived features provided the high Diagnostics Odds Ratio(DOR)of *** shows a high margin of 8.2%when compared with the ensemble model with no derived features(DOR=96.306)included in the *** inclusion of derived features with the FE approach of the current state-of-the-art made the ensemble model performs well with Sensitivity(0.793),Specificity(0.945),DOR(79.517),and False Omission Rate(0.090)which further improves the state-of-the-art results.

关键词： Diabetes prediction feature engineering highly informative features ML models ensembling models

MHD Control of Oblique Detonation Waves

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Chinese Physics Letters 2011年第1期28卷 134-137页

作者： SUN xiao-Hui CHEN zhi-Hua ZHANG Huan-Hao Key Laboratory of Transient Physics Nanjing University of Science & Technology Nanjing 210094

Based on the Euler equation, the hybrid Roe/HLL scheme is employed to simulate the oblique detonation waves （ODWs）. Furthermore, ***）＇namic （MHD） control of both stable and unstable ODWs is investigated. It is shown that the stable ODW wave front can be controlled to the desired position under different inflow Mach numbers. However, for an unstable ODW, it is difficult for the MHD control to return the ODW front, but the unstable ODW turns to be stable with the Lorentz force applied in proper direction.

关键词： Fluid dynamics

Multi-objective optimization of feature selection using hybrid cat swarm optimization

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Science China(Technological Sciences) 2021年第3期64卷 508-520页

作者： GAO xiao-zhi NALLURI Madhu Sudana Rao KANNAN K SINHAROY Diptendu School of Computing University of Eastern FinlandKuopio 70210Finland School of Engineering Department of MathematicsAmrita Vishwa VidyapeethamCoimbator 641112India School of Humanities and Sciences SASTRA UniversityThanjavur 612001India Department of Computer Science and Engineering National Institute of TechnologyMeghalayaShillong 793003India

With the pervasive generation of information from a wide range of sensors and devices,there always exist a large number of input features in databases,thus complicating machine learning problem ***,certain features are relatively impertinent to specific problems,which may degrade the performances of classifiers in terms of prediction accuracy,sensitivity,specificity,and recall *** main goal of a multi-objective optimization problem is to identify the subsets of the given *** this end,a hybrid cat swarm optimization(HCSO)algorithm is proposed in our paper for performance improvement of the basic cat swarm optimization(CSO)that incorporates guided and competitive&inherent characteristics into the original *** performance of HCSO has been tested by finding the optimal feature subset for 15 benchmark *** number of class labels for these datasets varies between 2 and *** time complexity analysis of both CSO and HCSO has also been ***,the performance of the proposed algorithm has been compared with that of simple CSO and other state-ofthe-art *** performances obtained by HCSO have an average 2.68%improvement with a standard deviation of *** maximum performance improvement is up to 10.09%in prediction *** on the same datasets,CSO has yielded improvements within the range of-7.27%to 8.51%with an average improvement 0.9%and standard deviation *** statistical tests carried out in the experiments prove that HCSO manifests a moderately better feature selection capacity than that of its counterparts.

关键词： feature selection competition cat swarm optimization guided search parameter evolution

脓毒症患者不同心功能障碍类型的临床特点及预后

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中国老年学杂志 2024年第6期44卷 1281-1284页

作者：张照龙王金忠王小智符史健海口市第四人民医院重症医学科海南海口571100

目的探讨脓毒症患者不同心功能障碍类型的临床特点并分析预后情况。方法选取重症监护室诊治的120例脓毒血症患者,根据30~60 d内生存情况分为生存组77例和死亡组43例,分析不同预后组的临床指标及床旁超声心动图指标。根据床旁超声心动... 详细信息

目的探讨脓毒症患者不同心功能障碍类型的临床特点并分析预后情况。方法选取重症监护室诊治的120例脓毒血症患者,根据30~60 d内生存情况分为生存组77例和死亡组43例,分析不同预后组的临床指标及床旁超声心动图指标。根据床旁超声心动图分为左心功能障碍组77例[左心室收缩功能障碍组(n=32)、左心室舒张功能障碍组(n=45)]和右心功能障碍组(n=36)和心功能正常组(n=43),评价脓毒症患者不同心功能障碍的临床特点及预后情况。结果与生存组比较,死亡组年龄、氧合指数、白细胞计数、C反应蛋白(CRP)、降钙素原(PCT)、血红蛋白(Hb)、序贯器官衰竭估计(SOFA)评分、急性生理学及慢性健康评估(APACHEⅡ)系统评分、左室舒张末内径(LVEDD)、左室收缩末内径(LVESD)、心输出量(CO)、左室射血分数(LVEF)、早期充盈峰速度E峰/舒张早期峰值运动速度E′比值(E/E′)和三尖瓣环收缩期位移(TAPSE)上差异有统计学意义(P<0.05)。与心功能正常组比较,左心室收缩功能障碍组心率(HR)、平均动脉压(MAP)、乳酸、去甲肾上腺素剂量和CO差异有统计学意义(P<0.05),左心室舒张功能障碍组年龄、HR、Hb上差异有统计学意义(P<0.05),右心功能障碍组MAP、中心静脉压(CVP)、Hb、肌钙蛋白T、乳酸、去甲状腺素用量、CO上差异有统计学意义(P<0.05);与心功能正常组比较,左心室收缩功能障碍组左心室舒张功能障碍组和右心功能障碍组60 d病死亡率差异有统计学意义(P<0.05)。结论脓毒症患者预后不良组存在心功能相关指标异常,而存在心功能障碍的脓毒症患者60 d病死率增高。

关键词：脓毒症超声心动图心功能障碍

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从《民法典》视角区分物业管理与物业服务

武汉冶金管理干部学院学报 2024年第2期34卷 21-25页

作者：付剑钟支晓夏轶安徽省烟草公司合肥市公司安徽合肥230000 黑龙江科技大学管理学院黑龙江哈尔滨150000

我国物业服务企业起步较晚,在制度设计上存在些许问题,其中比较常见的问题就是“物业管理”和“物业服务”的混用。近年来随着研究深入和立法意识提高,物业管理与物业服务的区分正在逐步拉开,《民法典》更是将“物业管理”以“物业服务... 详细信息

我国物业服务企业起步较晚,在制度设计上存在些许问题,其中比较常见的问题就是“物业管理”和“物业服务”的混用。近年来随着研究深入和立法意识提高,物业管理与物业服务的区分正在逐步拉开,《民法典》更是将“物业管理”以“物业服务”来代替。认识物业管理与物业服务除了能够理清二者的区别,更能够解决学术上对于物业管理与物业服务的混乱表述,也能缓解司法实践中业主和物业服务人的矛盾愈演愈烈。我国物业制度正处于“管理型物业”向“服务型物业”的过渡阶段。《民法典》将物业服务合同新增为有名合同表明在服务中体现管理,在管理中实现服务才是新的历史阶段物业服务合同的应有之意。

关键词：物业服务企业民法典物业服务