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基于最优Rump区间算子的非线性方程组解的可信验证方法

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数学的实践与认识 2024年第3期54卷 88-98页

作者：姚李侯国亮蒋莹莹长春师范大学数学学院吉林长春130032

基于Baumann最优中心形式对Rump提出的非线性方程组解的存在性验证方法进行了改进.首先研究了Rump区间算子与Krawczyk区间算子的关系;其次借鉴最优Krawczyk区间算子的构造过程,给出了Rump区间算子的最优形式;最后根据改进的Rump解的存... 详细信息

基于Baumann最优中心形式对Rump提出的非线性方程组解的存在性验证方法进行了改进.首先研究了Rump区间算子与Krawczyk区间算子的关系;其次借鉴最优Krawczyk区间算子的构造过程,给出了Rump区间算子的最优形式;最后根据改进的Rump解的存在性定理,设计了验证非线性方程组解存在的区间算法程序.与Rump验证算法相比,理论分析与数值实验均表明,所提算法均可以给出宽度最窄(或至少相同)的解的包含区间.

关键词：最优Rump区间算子 Baumann最优中心形式可信验证

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天麻钩藤饮加减治疗高血压的临床疗效

中国药物经济学 2024年第6期19卷 53-56页

作者：姜英莹大连市金州区中医医院辽宁大连116100

目的探讨天麻钩藤饮加减治疗高血压的临床疗效。方法选取2021年4月至2022年8月大连市金州区中医医院收治的104例高血压患者作为研究对象,应用随机抽签的原则分为对照组与观察组,各52例。对照组予以硝苯地平缓释片,观察组在对照组基础上... 详细信息

目的探讨天麻钩藤饮加减治疗高血压的临床疗效。方法选取2021年4月至2022年8月大连市金州区中医医院收治的104例高血压患者作为研究对象,应用随机抽签的原则分为对照组与观察组,各52例。对照组予以硝苯地平缓释片,观察组在对照组基础上使用天麻钩藤饮加减治疗,比较两组的治疗效果。结果治疗后观察组头晕目眩、面红耳赤、口干口苦、烦躁易怒评分低于对照组(P0.05)。结论采用天麻钩藤饮加减治疗高血压效果显著,可改善患者临床症状,降低血压水平,提高生命质量,且安全性较高。

关键词：高血压天麻钩藤饮加减临床疗效中医证候积分生命质量

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甘肃红色文化资源保护与开发路径研究

陇东学院学报 2024年第4期35卷 22-26页

作者：姜莹莹中共兰州市委党校兰州市行政学院马克思主义教研部甘肃兰州730030

甘肃是一片革命热土,红色文化资源丰富。因地制宜开发和利用红色资源,传承红色基因,弘扬红色文化,促进甘肃省红色文化资源的持续发展,具有重大的理论意义和现实意义。从加大甘肃红色文化资源的挖掘力度、整合力度、创新力度以及人才队... 详细信息

甘肃是一片革命热土,红色文化资源丰富。因地制宜开发和利用红色资源,传承红色基因,弘扬红色文化,促进甘肃省红色文化资源的持续发展,具有重大的理论意义和现实意义。从加大甘肃红色文化资源的挖掘力度、整合力度、创新力度以及人才队伍建设等方面入手,从而进一步深入研究甘肃省红色文化资源开发利用的现状,总结所取得的成绩,全方位分析其面临的困难和问题,这不仅有利于深入挖掘甘肃红色文化资源的潜力,破解甘肃红色文化资源保护与开发的深层次矛盾,还能提供甘肃红色文化资源保护与开发的发展思路和方向,从而助推甘肃经济社会高质量发展。

关键词：甘肃省红色文化资源保护开发

FINITE ELEMENT NUMERICAL SIMULATION OF THREE-DIMENSIONAL SEEPAGE CONTROL FOR DEEP FOUNDATION PIT DEWATERING

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Journal of Hydrodynamics 2008年第5期20卷 596-602页

作者： LUO Zu-jiang ZHANG ying-ying WU Yong-xia College of Civil Engineering Hohai University Nanjing 210098 China

For deep foundation pit dewatering in the Yangtze River Delta, it is easy to make a dramatic decrease of the underground water level surrounding the dewatering area and cause land subsidence and geologic disasters. In this work, a three-dimensional finite element simulation method was applied in the forth subway of Dongjiadu tunnel repair foundation pit dewatering in Shanghai. In order to control the decrease of the underground water level around the foundation pit, the foundation pit dewatering method was used to design the optimization project of dewatering ,which was simulated under these conditions that the aquifers deposited layer by layer, the bottom of the aquifers went deep to 144.45 m, the retaining wall of foundation pit shield went deep to 65 m, the filters of the extraction wells were located between 44 m to 59 m, the water level in the deep foundation pit was decreased by 34 m, and the maximum decrease of water level outside the foundation pit was 3 m. It is shown that the optimization project and the practical case are consistent with each other. Accordingly, the three-dimensional finite element numerical simulation is the basic theory of optimization design of engineering structures of dewatering in deep foundation pit in such areas.

关键词： Yangtze River Delta land subsidence deep foundation pit dewatering seepage control

我国3省市门诊中老年慢性疼痛病人的流行特征分析

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中国疼痛医学杂志 2024年第5期30卷 341-347页

作者：杜成欣张伟伟许丽媛樊碧发董建群颜流霞姜莹莹中国疾病预防控制中心慢性非传染性疾病预防控制中心北京2100050 中日友好医院疼痛科北京100029

目的:调查了解我国3省市门诊中老年慢性疼痛病人流行特征。方法:2023年4月至8月采用多阶段分层抽样方法,在北京市、重庆市、江西省各抽取1家三级甲等综合医院和二级甲等综合医院,纳入年龄≥45岁、主诉疼痛时间持续超过3个月的门诊慢性... 详细信息

目的:调查了解我国3省市门诊中老年慢性疼痛病人流行特征。方法:2023年4月至8月采用多阶段分层抽样方法,在北京市、重庆市、江西省各抽取1家三级甲等综合医院和二级甲等综合医院,纳入年龄≥45岁、主诉疼痛时间持续超过3个月的门诊慢性疼痛病人。通过问卷调查了解调查对象的一般情况和慢性疼痛流行特征。计数资料用率表示,采用秩和检验分析单向有序资料,趋势χ^(2)检验分析双向有序资料,采用二元logistic回归分析病人疼痛程度的影响因素。结果:纳入分析的有效样本为4151例,其中男性1803例(43.4%)、女性2348例(56.6%);45~64岁2193例(52.8%)、≥65岁1958例(47.2%)。疼痛轻、中、重度分别为1079例(26.0%)、2535例(61.1%)、537例(12.9%)。慢性疼痛病人的疼痛程度在年龄(χ^(2)=39.061,P<0.001)、东中西部地区(Z=768.542,P<0.001)、城乡地域(Z=-10.513,P<0.001)、文化程度(χ^(2)=4.280,P<0.05)、家庭年收入(χ^(2)=26.707,P<0.001)、是否有既往病史(Z=-3.685,P<0.001)、饮酒状况(χ^(2)=10.172,P<0.01)、疼痛年限(χ^(2)=12.617,P<0.001)、疼痛部位数量(χ^(2)=106.442,P<0.001)的比较中差异有统计学意义(P<0.05)。二元logistic回归分析结果显示,年龄≥65岁(OR=1.69,95%CI:1.38-2.07)、居住在农村地域(OR=2.09,95%CI:1.58-2.77)、文化程度大专及以上(OR=1.48,95%CI:1.10-2.00)、疼痛部位数量≥2处(OR=1.73,95%CI:1.42-2.10)是重度疼痛的危险因素(P<0.05)。结论:我国3省市门诊中老年慢性疼痛病人以中度疼痛为主。年龄高低、城乡地域、文化程度、疼痛部位多寡是疼痛程度的重要影响因素。应尽早识别和干预相关影响因素,以便更全面地评估疼痛程度和制定个性化的治疗方案,从而改善病人疼痛治疗和管理效果。

关键词：中老年慢性疼痛疼痛程度影响因素

基于SPO模型构建PIVAS输液安全管理体系研究

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医院管理论坛 2024年第5期41卷 21-24页

作者：徐红平廖莉许晓强蒋莹莹杭州市儿童医院

目的探讨结构-过程-结果 (structure-process-outcome, SPO)模型在静脉用药调配中心(PIVAS)输液安全管理体系中的作用。方法基于SPO模型的基础上结合医疗失效模式与效应分析(HFMEA)方法,对PIVAS输液安全体系进行研究,制定并实施有效... 详细信息

目的探讨结构-过程-结果 (structure-process-outcome, SPO)模型在静脉用药调配中心(PIVAS)输液安全管理体系中的作用。方法基于SPO模型的基础上结合医疗失效模式与效应分析(HFMEA)方法,对PIVAS输液安全体系进行研究,制定并实施有效防范措施,对改进前后数据进行分析。结果 PIVAS输液安全提高,差错率下降明显。结论基于SPO模型构建PIVAS输液安全管理体系,能够降低PIVAS成品输液安全管理中的不合格率,确保患儿静脉输液安全。

关键词：安全管理失效模式与效应分析静脉用药调配中心结构-过程-结果模型

Particle Distribution Informed by Chain Rigidity in Diblock Copolymer Melts: The Effect of Entropy

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Chinese Journal of Polymer Science 2024年第3期42卷 388-399,I0009页

作者： Yuguo Chen Shuanhu Qi ying jiang School of Chemistry Beihang UniversityBeijing 100191China

We study the effect of chain rigidity on tailoring the nanoparticle locations for neutral and selective particles embedded in the lamellar morphology formed by semiflexible diblock copolymer chains using self-consistent field calculations. The nanoparticles are modeled through a cavity function, and the semiflexible chains are represented by the continuous Kratsky-Porod chain model. In general situation, the nanoparticles prefer to stay at the interface in order to reduce the interface areas and thus the system free energy. However, the particle distribution at the domain center is subtle, and the underlying physics is intrinsically different depending on the polymer flexibility. In the case of flexible chains, the entropy just contributes a constant shift to the free energy when the nanoparticles move around the domain center indicating that the local metastable state if appears at the domain center is wholly attributed to the local minimum in the enthalpy. If the polymers are rigid, the variation of the particle distribution at the domain center has a close relation with the polymer rigidity and nanoparticle size. In the case of strongly rigid polymers with small nanoparticles, a nearly uniform particle distribution at the domain center is observed, while in other cases, a local enhancement of particle distribution there is found. In contrast to the case of flexible chains, further analysis reveals the crucial role of entropy in controlling the shape of particle distributions at the phase domain. Specifically, the local metastable state appears in the domain center is determined by the large entropy there which arises from the weak coupling of bond orientations that allows the polymer chains to be relatively relaxed. When the particle becomes selective, its distribution in the phase domain exhibits a shift almost uniformly rather than changes its profile, and the underlying physics still holds. In all, our study establishes a strong coupling between the chain rigi

关键词： Semiflexible diblock copolymer Nanoparticle distribution Self-consistent field theory Entropic effect

Ultrafast optical investigation of carrier and spin dynamics in low-dimensional perovskites

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Science China(Technological Sciences) 2024年第1期67卷 2-18页

作者： FU JinYue jiang ying FANG HongHua Key Laboratory for Micro-Nano Physics and Technology of Hunan Province School of Physics and ElectronicsHunan UniversityChangsha 410012China State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing 100084China

Low-dimensional perovskite(PVK)materials have attracted significant research interest,because of their quantum-confined effect,tunable band gap structures,and higher stability than that of three-dimensional(3D)*** semiconductor optoelectronic devices,high speed and small size are closely *** development of high-speed devices requires researchers to fully understand the properties of materials,especially the dynamic processes such as carrier recombination,separation,and transport,which often play a crucial role in the performance of *** an indispensable part of dynamic research,spin relaxation is also of great significance in studying the properties of materials and explore possible *** halide PVK materials have strong spin-orbit coupling(SOC),which provides a basis for information storage and processing by using spin degrees of ***,studying the carrier and spin dynamics of low-dimensional PVKs is an effective way to understand the internal properties of low-dimensional PVKs *** paper summarizes the latest research progress on the ultrafast carrier and spin dynamics in low-dimensional PVKs,to comprehensively understand their carrier and spin behaviors and present an outlook for relevant studies in this area.

关键词： low-dimensional perovskites carrier dynamics spin dynamics optoelectronic devices

Effectiveness Analysis on the Physical Activity and the Health Benefit of a Community Population Based Program

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Biomedical and Environmental Sciences 2013年第6期26卷 468-473页

作者： jiang ying ying YANG Zheng Xiong NI Rong ZHU You Qun LI Zhi Yu YANG Li Chen ZHAI Yi ZHAO Wen Hua National Center for Chronic and Non-communicable Disease Control and Prevention Chinese Center for Disease Control and Prevention Chinese Center for Disease Control and Prevention International Life Science Institute Focal Point in China Information Center Health Bureau of Zhejiang Province Health Bureau of Gongshu District Center for Disease Control and Prevention of Gongshu District Institute of Nutrition and Food Safety Chinese Center for Disease Control and Prevention

Objective To evaluate the community-based health promotion effect of physical activity. Methods The residents aged 28 and above from two communities in Gongshu District of Hangzhou City, Zhejiang province, were randomly selected and recruited for the multi-strategy and comprehensive physical activity intervention. Questionnaire survey, physical check up and blood biochemistry were conducted. Results After this two-year intervention, the time of the participant spent on weekly physical activity of moderate intensity increased from 464 min to 542 min （P〈0.05）, with an average increase of 78 min. Time spent in walking every week increased from 533 min to 678 min （P〈0.05）, with an average increase of 245 min. The body weight, waistline, blood pressure and heart rate all reduced significantly （P〈0.05）; the vital capacity increased significantly （P〈0.05）; and the related biochemical indicators were also improved. Conclusion Comprehensive and evidence-based physical activity interventions targeting community population can improve the levels of physical activity, related body measurement and biochemical indicators.

关键词： Physical activity Community population Health promotion Walking