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老年髋关节置换术病人围手术期内并发心力衰竭的列线图预测模型构建

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实用老年医学 2024年第4期38卷 358-361,366页

作者：石鹏飞李娜叶烁刘耀明白洁联勤保障部队第940医院骨科甘肃省兰州市730070 联勤保障部队第940医院麻醉手术科甘肃省兰州市730070 联勤保障部队第940医院第二派驻门诊部甘肃省兰州市730070

目的分析探讨老年髋关节置换术病人围手术期内并发心力衰竭(心衰)的风险因素,建立列线图预测模型。方法选取联勤保障部队第940医院198例行髋关节置换术的老年病人,根据围手术期是否并发心衰分为心衰组56例和非心衰组142例。收集所有病... 详细信息

目的分析探讨老年髋关节置换术病人围手术期内并发心力衰竭(心衰)的风险因素,建立列线图预测模型。方法选取联勤保障部队第940医院198例行髋关节置换术的老年病人,根据围手术期是否并发心衰分为心衰组56例和非心衰组142例。收集所有病人的临床相关资料并进行比较分析,采用Logistic回归分析老年髋关节置换术病人围手术期内并发心衰的影响因素,采用R语言软件包构建列线图预测模型并采用Bootstrap法进行验证。结果心衰组年龄≥70岁、有高血压史、术前美国麻醉医师协会(ASA)分级Ⅲ~Ⅳ级、术中输血量≥400 mL、术后卧床时间≥4 d比例显著高于非心衰组(P<0.05)。多因素Logistic回归结果显示,年龄、高血压史、术前ASA分级、术中输血量、术后卧床时间均是影响老年髋关节置换术病人围手术期内并发心衰的独立危险因素(P<0.05)。列线图模型预测老年髋关节置换术病人围手术期内并发心衰的预测值与实测值基本一致。ROC曲线验证列线图模型的AUC为0.901,预测效能较高。结论依据老年髋关节置换术病人围手术期内并发心衰的危险因素构建的列线图模型有较高的预测效能。

关键词：髋关节置换术老年人心力衰竭列线图模型

Ten Years Review of Chinese Wind Power industry 2003-2013

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Electricity 2014年第2期25卷 1-5,14页

作者： shi pengfei

Presented by the World Wind Energy Association(WWEA)and the Chinese Wind Energy Association(CWEA),the Third World Wind Energy Conference(WWEC2004)was held in Beijing in November *** that time China just started to develop wind power industry in large *** organizations and government agencies related to energy and environmental issues were at-

关键词：风电产业中国国际组织政府机构环境问题风能规模化展览会

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世界文化旅游名城评价标准研究

资源开发与市场 2024年第3期40卷 444-450页

作者：明庆忠周志利史鹏飞王雪波杨德钦云南财经大学旅游文化产业研究院云南昆明650221 云南尚博智库旅游营销策划有限公司云南昆明650227

旅游城市高品质建设和城市旅游高质量发展,对如何打造世界文化旅游名城提出了新要求。在剖析世界文化旅游名城发展趋势的基础上,从自身的内涵和特征出发,通过对国家、行业和学界相关评价标准的回顾,结合理论分析、实践经验和专家咨询,... 详细信息

旅游城市高品质建设和城市旅游高质量发展,对如何打造世界文化旅游名城提出了新要求。在剖析世界文化旅游名城发展趋势的基础上,从自身的内涵和特征出发,通过对国家、行业和学界相关评价标准的回顾,结合理论分析、实践经验和专家咨询,探索构建了世界文化旅游名城的评价指标体系。着眼于文旅吸引力国际化水平、产业发展能力国际化水平、城市高质量发展国际化水平、市场发育潜力国际化水平、游客体验质量综合水平等五个维度,尤其注重游客满意度、创新能力、品牌形象等方面,选取了15个二级指标、细化出100个三级指标形成了世界文化旅游名城评价指标体系,并根据评价分值,将世界文化旅游名城的发展阶段划分为基础夯实阶段、建设冲刺阶段、基本建成阶段、全面建成阶段。

关键词：世界文化旅游名城发展趋势评价标准高质量发展

渝东南民族地区乡村旅游巩固脱贫攻坚成果的影响因素研究

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资源开发与市场 2024年第8期40卷 1258-1269页

作者：黄国庆况鲜洁时朋飞刘钇张苏梅西南大学经济管理学院重庆400715 西南财经大学工商管理学院四川成都611130

中国已全面建成小康社会,进入巩固拓展脱贫攻坚成果的新阶段。基于修正的可持续旅游生计理论,以渝东南民族地区为例,定量测度乡村旅游巩固脱贫攻坚成果的成效,运用结构方程模型分析乡村旅游巩固脱贫攻坚成果的影响因素。结果表明:①经... 详细信息

中国已全面建成小康社会,进入巩固拓展脱贫攻坚成果的新阶段。基于修正的可持续旅游生计理论,以渝东南民族地区为例,定量测度乡村旅游巩固脱贫攻坚成果的成效,运用结构方程模型分析乡村旅游巩固脱贫攻坚成果的影响因素。结果表明:①经济、文化、社会、环境4个层面在巩固脱贫攻坚成果的步调一致,但是没有形成良好的互动机制,属于勉强协调发展的水平,制约了4个系统间的协调发展;②渝东南民族地区乡村旅游巩固脱贫攻坚成果的影响因素重要性从大到小依次为经济资本、人力资本、自然资本、制度资本、社会资本,均具有显著正向影响。针对以上结论,为巩固脱贫攻坚成果,本文从优化经济与人力资本、完善制度与自然资本、强化文化和社会认同3个方面提出对策建议。

关键词：渝东南民族地区乡村旅游巩固脱贫攻坚成果影响因素结构方程模型

Review of Chinese Wind Power Industry in 2005 and Its Prospects in the Coming Five Years

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Electricity 2006年第4期17卷 12-14页

作者： shi pengfei China Hydropower Engineering Consulting Group Corporation

The statistics on Chinese wind power installed capacity for year 2005 show that the wind power farm construction grew rapidly but the capability of equipment domestication remained weak. Looking back at the events occurred in 2005 that have milestone significance for wind power, we can see how they influence the development tendency. Also, this article points out the progress and lessons of wind power in the period of the Tenth Five-Year Plan, and emphasizes that the wind power performance in the coming five years should be appraised based on the capability of equipment domestication and electric energy sent to network.

关键词：动力能源工业中国电力资源电力建设风能行业

Wireless Location Determination for Mobile Objects Based on GSM in Intelligent Transportation Systems

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Journal of Systems Engineering and Electronics 2003年第2期14卷 8-13页

作者： Xu Zhiyang & shi pengfei Institute of Image Processing and Pattern Recognition, Shanghai Jiaotong University, Shanghai 200030, P. R. China Institute of Image Processing and Pattern Recognition Shanghai Jiaotong University Shanghai 200030 P. R. China

The mobile object (MO) location determination technologies which can be used in intelligent transportation system (ITS) are studied in this paper. The principles and characteristics of wireless location determination technologies are introduced and the characteristics of GSM useful for location determination are also summarized. An experimental positioning system based on GSM is proposed, and the architecture is described. TOA method based on GSM signals and TDOA method are used in the experimental system. Moreover, the methods are simulated. The performance of the positioning methods is assessed in the simulation environment, and the accuracy for 67% mobile stations (MS) is 70m in urban areas.

关键词： Wireless location TDOA AOA TOA GSM ITS

废旧磷酸铁锂电极粉中Li和Fe同步浸出动力学研究

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有色金属（冶炼部分） 2024年第9期 91-101页

作者：石鹏飞介亚菲杨声海常娣方港丁江黄燕婷陈永明中南大学冶金与环境学院长沙410083 九江天赐资源循环科技有限公司江西九江332599 南华大学资源环境与安全工程学院湖南衡阳421001

废旧磷酸铁锂中有价组分高值化回收和利用具有资源循环和环境保护双重意义。对废旧磷酸铁锂电极粉的浸出过程进行了条件优化和动力学研究,系统探究了硫酸浓度、反应温度、电极粉粒径及搅拌速度对Li和Fe浸出行为的影响,并阐明了Li和Fe的... 详细信息

废旧磷酸铁锂中有价组分高值化回收和利用具有资源循环和环境保护双重意义。对废旧磷酸铁锂电极粉的浸出过程进行了条件优化和动力学研究,系统探究了硫酸浓度、反应温度、电极粉粒径及搅拌速度对Li和Fe浸出行为的影响,并阐明了Li和Fe的浸出动力学机理。结果表明:在硫酸浓度2.5 mol/L、浸出温度75℃、粒径0.14 mm左右、搅拌速率400 r/min的条件下,Li和Fe的浸出率均在99.8%以上。动力学研究表明浸出过程受外扩散控制,浸出动力学方程符合Avrami模型,浸出过程中Fe和Li的表观活化能分别为11.03、8.45 kJ/mol。废旧磷酸铁锂电极粉中Li和Fe的浸出动力学机理结果可为有价元素的同时提取提供理论指导。

关键词：废旧磷酸铁锂硫酸浸出 Fe Li 浸出动力学

A new series of two-photon polymerization initiators:Synthesis and nonlinear optical properties

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Science China Chemistry 2009年第12期52卷 2180-2185页

作者： GAN XiaoPing ZHOU HongPing shi pengfei WANG Peng WU JieYing TIAN YuPeng YANG JiaXiang XU GuiBao ZHOU YuFang JIANG MinHua Department of Chemistry Anhui University and Key Laboratory of Functional Inorganic Materials Chemistry of Anhui ProvinceHefei 230039China Department of Applied Chemistry School of ScienceAnhui Agriculture UniversityHefei 230036China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China State Key Laboratory of Coordination Chemistry Nanjing UniversityNanjing 210093China

Four photopolymerization initiators with D-π-D (D,donor; π,conjugation system) structure have been synthesized by solvent-free reaction and characterized by 1H NMR spectroscopy,IR and elemental analysis. The one-photon and two-photon excited fluorescence have been investigated in different solvents. Experimental results of the one-photon and two-photon absorption cross sections show different trends in OPA and TPA ability with different substitution groups in donor units.

关键词： two-photon absorption micro-fabrication polymerization solvent-free

Targeting cancer stem cell pathways for cancer therapy

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Signal Transduction and Targeted Therapy 2020年第1期5卷 2395-2429页

作者： Liqun Yang pengfei shi Gaichao Zhao Jie Xu Wen Peng Jiayi Zhang Guanghui Zhang Xiaowen Wang Zhen Dong Fei Chen Hongjuan Cui State Key Laboratory of Silkworm Genome Biology Southwest University400716 ChongqingChina Cancer Center Medical Research InstituteSouthwest University400716 ChongqingChina Department of Pharmaceutical Sciences Eugene Applebaum College of Pharmacy and Health SciencesWayne State UniversityDetroitMI 48201USA

Since cancer stem cells(CSCs)were first identified in leukemia in 1994,they have been considered promising therapeutic targets for cancer *** cells have self-renewal capacity and differentiation potential and contribute to multiple tumor malignancies,such as recurrence,metastasis,heterogeneity,multidrug resistance,and radiation *** biological activities of CSCs are regulated by several pluripotent transcription factors,such as OCT4,Sox2,Nanog,KLF4,and *** addition,many intracellular signaling pathways,such as Wnt,NF-κB(nuclear factor-κB),Notch,Hedgehog,JAK-STAT(Janus kinase/signal transducers and activators of transcription),PI3K/AKT/mTOR(phosphoinositide 3-kinase/AKT/mammalian target of rapamycin),TGF(transforming growth factor)/SMAD,and PPAR(peroxisome proliferator-activated receptor),as well as extracellular factors,such as vascular niches,hypoxia,tumor-associated macrophages,cancer-associated fibroblasts,cancer-associated mesenchymal stem cells,extracellular matrix,and exosomes,have been shown to be very important regulators of ***,vaccines,antibodies,and CAR-T(chimeric antigen receptor T cell)cells have been developed to specifically target CSCs,and some of these factors are already undergoing clinical *** review summarizes the characterization and identification of CSCs,depicts major factors and pathways that regulate CSC development,and discusses potential targeted therapy for CSCs.

关键词： cancer stem pathways