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蓄热式铝熔炼炉熔炼过程的数值模拟

中国有色金属学报 2011年第9期21卷 2242-2250页

作者：王计敏闫红杰周孑民李世轩贵广臣中南大学能源科学与工程学院长沙410083 苏州新长光热能科技有限公司苏州215008

为了更好地研究和优化铝熔炼炉的性能,针对现有的蓄热式圆形铝熔炼炉,在建立合理的铝熔炼炉基本模型的基础上,通过耦合用户自定义熔化模型和氧化烧损模型,运用计算流体力学软件FLUENT实现燃烧空间和熔池的耦合物理场的数值模拟。着重研... 详细信息

为了更好地研究和优化铝熔炼炉的性能,针对现有的蓄热式圆形铝熔炼炉,在建立合理的铝熔炼炉基本模型的基础上,通过耦合用户自定义熔化模型和氧化烧损模型,运用计算流体力学软件FLUENT实现燃烧空间和熔池的耦合物理场的数值模拟。着重研究不同固液区和不同孔隙率对铝及铝合金熔炼过程的影响。结果表明,该模型较好地反映铝熔炼炉的熔炼现象,可运用该模型进行铝熔炼炉熔炼过程工艺参数的优化研究。同时获得了固液区和孔隙率对熔炼参数影响规律:铝液温度在固液区上升缓慢,而离开固液相线时,铝液温度上升速度加快,炉膛温度和氧化层质量随着熔炼时间分别呈周期性增加和呈抛物线增加;随着氧化层厚度的增加,铝液温度随着孔隙率的增加而增加变得缓慢。

关键词：蓄热式铝熔炼炉熔炼过程数值模拟

综合管理对LVEF保留慢性心衰伴血流动力学异常患者心功能及MAP、CO的影响

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中国血液流变学杂志 2024年第2期34卷 333-338页

作者：张亚萍卢寒杨杰南阳医学高等专科学校第一附属医院心血管内科河南南阳473000 南阳医学高等专科学校第一附属医院医学检验科河南南阳473000

目的探讨综合管理对左心射血分数(LVEF)保留慢性心衰伴血流动力学异常患者的心功能、平均动脉压(MAP)、心输出量(CO)影响。方法选取2021年1月—2022年2月在南阳医学高等专科学校第一附属医院就诊的LVEF保留慢性心衰血流动力学异常患者11... 详细信息

目的探讨综合管理对左心射血分数(LVEF)保留慢性心衰伴血流动力学异常患者的心功能、平均动脉压(MAP)、心输出量(CO)影响。方法选取2021年1月—2022年2月在南阳医学高等专科学校第一附属医院就诊的LVEF保留慢性心衰血流动力学异常患者116例,按照随机数字表法分为研究组(n=58)和常规组(n=58)。常规组采用常规管理,研究组在常规组基础上联合综合护理,比较两组自我管理能力、心功能[左室舒张末径(LVDED)、心率(HR)、LVEF、6 min步行距离]、情绪状态[焦虑自评量表(SAS)、抑郁自评量表(SDS)]、MAP、CO、应对方式、自护能力、再住院次数、生活质量[明尼苏达心衰生活质量量表(MLHFQ)]、满意度。结果干预后研究组心力衰竭患者自我管理量表评分较常规组高,SAS、SDS、MLHFQ评分较常规组低(Pmin步行距离较高(P<0.05);干预后,与常规组比较,研究组MAP、CO均较常规组高(P<0.05);干预后研究组积极应对、ESCA评分较常规组高,消极应对评分较常规组低(P<0.05);干预后、干预后3个月研究组再住院次数均低于常规组(P<0.05);干预后研究组总满意度96.55%高于常规组81.03%(P<0.05)。结论综合管理可提升LVEF保留慢性心衰血流动力学异常患者自我管理能力及自护能力,改善患者情绪状态及心功能,调节患者应对方式,还可有效改善预后,提高患者生活质量及满意度。

关键词：综合管理 LVEF保留慢性心衰自我管理能力心功能

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实测爆炸分离冲击数据的分析和处理

固体火箭技术 2006年第1期29卷 72-74页

作者：袁宏杰姜同敏北京航空航天大学工程系统工程系环境实验室北京100083

由于爆炸分离冲击环境的频带宽(可到100 kHz)、加速度大(可到300 000gn),常常导致测量数据失真。对实测的爆炸分离冲击数据应分析、确认、修正后才能使用。分析了放大器的压摆率对信号频率的限制,讨论了某实测爆炸分离冲击信号零漂产生... 详细信息

由于爆炸分离冲击环境的频带宽(可到100 kHz)、加速度大(可到300 000gn),常常导致测量数据失真。对实测的爆炸分离冲击数据应分析、确认、修正后才能使用。分析了放大器的压摆率对信号频率的限制,讨论了某实测爆炸分离冲击信号零漂产生的原因,应用小波分析的方法对失真的冲击波形进行了分解和重构,提取了真实的爆炸分离冲击信号。

关键词：爆炸分离冲击小波放大器饱和

无创高频振荡通气与经鼻持续气道正压通气作为早产儿拔管后呼吸支持的疗效与安全性Meta分析

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中华新生儿科杂志（中英文） 2024年第5期39卷 294-300页

作者：胡晓芳程洁侯佳璐张敏郑卿勇王倩田金徽张志刚王杨周长治市人民医院护理部长治046000 兰州大学循证医学中心兰州73000 兰州大学第一医院重症医学科兰州730099

目的采用Meta分析的方法比较无创高频振荡通气(noninvasive high-frequency oscillatory ventilation,NHFOV)与经鼻持续气道正压通气(nasal continuous positive airway pressure,NCPAP)作为早产儿拔管后呼吸支持的有效性与安全性。方法计算机检索Cochrane Library、PubMed、Web of Science、Embase、中国生物医学文献数据库、中国知网、维普、万方及中华医学期刊全文数据库中将NHFOV与NCPAP作为早产儿拔管后呼吸支持的文献,检索时限为建库至2023年4月30日。由2名研究者独立筛选文献、提取资料并评价纳入研究的偏倚风险后,采用RevMan 5.4软件进行Meta分析。结果最终纳入9篇文献,文献质量评价结果显示,1项研究为A级,8项研究为B级。Meta分析结果显示,与NCPAP相比,NHFOV提高了早产儿撤机成功率(RR=1.33,95%CI 1.20~1.47,P<0.001),降低了再次插管率(RR=0.41,95%CI 0.25~0.65,P<0.001),提高了二氧化碳清除率(P<0.05),缩短了无创通气时间、总用氧时间、住院时间(P<0.05),降低了支气管肺发育不良、气漏、早产儿视网膜病、鼻外伤、腹胀、呼吸暂停等并发症发生率(P<0.05)。结论在早产儿拔管后应用NHFOV,能够提高早产儿撤机成功率、缩短无创通气时间、提高二氧化碳清除率并降低相关并发症发生率。

关键词：早产儿拔管后无创高频振荡通气经鼻持续气道正压通气

Global and regional trends in incidence and mortality of female breast cancer and associated factors at national level in 2000 to 2019

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Chinese Medical Journal 2022年第1期135卷 42-51页

作者： Chenyu Luo Na Li Bin Lu jie Cai ming Lu Yuhan Zhang Hongda Chen min Dai Office of Cancer Screening National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Department of Cancer Prevention Hunan Cancer HospitalChangshaHunan 410006China Department of General Surgery Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China

Background: Female breast cancer (FBC) has become the most prevalent malignancy worldwide. We aimed to evaluate the global and regional burden in epidemiological trends and factors associated with the incidence and mortality of ***: FBC incidence and mortality in 60 selected countries by cancer registry data integrity in 2020 were estimated from the GLOBOCAN database, and their association with the human development index (HDI) was further evaluated. Trends of age-standardized rates of incidence and mortality in 60 countries from 2000 through 2019 were evaluated by joinpoint regression analysis using data of Global Burden of Disease 2019. The association between potential behavioral, metabolic, and socioeconomic risk factor exposure at the nation level retrieved from the World Bank and Global Health Observatory and the incidence and mortality of FBC were evaluated by multivariate linear ***: FBC incidence and mortality varied greatly in the 60 included countries. Higher incidence and mortality rates were typically observed in countries with higher HDIs and vice versa. During 2000 to 2019, significantly increasing trends in incidence and mortality were observed in 26 (average annual percent changes [AAPCs], 0.35-2.96) and nine countries (AAPC, 0.30-1.65), respectively, while significantly decreasing trends in both incidence and mortality were observed in 22 countries, most of which were high-HDI countries. Among the population aged ≥40 years, there were 26 and 11 countries showing significantly increased trends in incidence and mortality, respectively. Ecological analysis showed that countries with higher prevalence rates of high cholesterol and higher health expenditures were more likely to have higher FBC incidence, and countries with higher rates of obesity and poorer universal health coverage were more likely to have higher FBC ***: Despite decreased or stabilized FBC incidence and mortality rates were observed in some cou

关键词： Breast cancer Trend Incidence Mortality Risk factor

基于四节点体温调节模型的睡眠系统舒适性预测

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纺织学报 2021年第9期42卷 150-155页

作者：潘梦娇卢业虎王敏苏州大学纺织与服装工程学院江苏苏州215006 东华大学现代服装设计与技术教育部重点实验室上海200051 吴江万旺纺织有限公司江苏苏州215226

为了优化设计人体睡眠系统,考虑了不同睡眠时期生理参数的差异性,建立并验证了睡眠状态下四节点体温调节模型,预测了核心温度和皮肤温度的变化,探讨了环境温度、被褥热阻及人体与被褥的接触面积3个因素对睡眠人体热舒适性的影响。研究... 详细信息

为了优化设计人体睡眠系统,考虑了不同睡眠时期生理参数的差异性,建立并验证了睡眠状态下四节点体温调节模型,预测了核心温度和皮肤温度的变化,探讨了环境温度、被褥热阻及人体与被褥的接触面积3个因素对睡眠人体热舒适性的影响。研究结果表明:核心温度和皮肤温度均随环境温度的升高而上升,但在较低环境温度下处于非快速眼动时期的核心温度几乎不受环境温度的影响;被褥热阻对核心温度的影响不大,皮肤温度随被褥热阻的增大而上升;核心温度和皮肤温度均随人体与被褥接触面积的增大而上升,但核心温度受接触面积的影响较小。此研究结果将为高性能家用纺织品的开发提供科学的参考。

关键词：体温调节热舒适四节点模型睡眠系统家用纺织品

Expert consensus of Chinese Association for the Study of Pain on the non-opioid analgesics for chronic musculoskeletal pain

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World Journal of Clinical Cases 2021年第9期9卷 2068-2076页

作者： Dong Huang Yan-Qing Liu Ling-jie Xia Xian-Guo Liu Ke Ma Guang-Zhao Liu Li-Zu Xiao Tao Song Xiao-Qiu Yang Zhi-Jian Fu min Yan Department of Algology Third Xiangya Hospital of Central South UniversityChangsha 410013Hunan ProvinceChina Department of Algology Beijing Tiantan HospitalCapital Medicine UniversityBeijing 100070China Department of Algology Henan Provincial People's HospitalZhengzhou 450008Henan ProvinceChina Department of Physiology and Pain Research Center Sun Yat-Sen UniversityGuangzhou 510089Guangdong ProvinceChina Department of Algology Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China Department of Algology The Second Hospital of Hebei Medical UniversityShijiazhuang 050000Hebei ProvinceChina Department of Algology Huazhong University of Science and Technology Union Shenzhen HospitalShenzhen 518052Guangdong ProvinceChina Department of Algology First Affiliated Hospital of China Medical UniversityShenyang 110001Liaoning ProvinceChina Department of Algology First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Algology Shandong Provincial HospitalJinan 250021Shandong ProvinceChina Department of Algology The Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310009Zhejiang ProvinceChina

Chronic musculoskeletal pain(CMP)is a common occurrence in clinical practice and there are a variety of options for the treatment of ***,the pharmacological therapy is still considered to be a primary *** recent years have witnessed the emergence of opioid crisis,yet there are no relevant guidelines on how to treat CMP with non-opioid analgesics *** Chinese Medical Association for the Study of Pain convened a panel meeting to develop clinical practice consensus for the treatment of CMP with non-opioid *** purpose of this consensus is to present the application of nonsteroidal antiinflammatory drugs,serotonin norepinephrine reuptake inhibitors,serotonin and norepinephrine reuptake inhibitors,muscle relaxants,ion channel drugs and topical drugs in CMP.

关键词： Chronic musculoskeletal pain Non-opioid analgesics Nonsteroidal antiinflammatory drugs Noradrenaline reuptake inhibitor Nociceptor Cyclooxygenase

Insights into the Biogenic Amine-Generating Microbes during Two Different Types of Soy Sauce Fermentation as Revealed by Metagenome-Assembled Genomes

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Food Science and Human Wellness 2023年

作者： Guiliang Tan Yi Wang min Hu Xueyan Li Xiangli Li Ziqiang pan Mei Li Lin Li Ziyi Zheng Lei Shi School of Material Science and Food Engineering， University of Electronic Science and Technology of China， Zhongshan Institute School of Environmental Science and Engineering， Changzhou University School of Health Industry Zhongshan Torch Polytechnic Shandong Yuwang Ecological Food Industry CO.， Ltd. Institute of Food Safety and Nutrition， Jinan University

In-depth knowledge of the microbes responsible for biogenic amine (BA) production during soy sauce fermentation remains limited. Herein， the variations in the BA profiles， microbial communities， and microbes involved in BA production during the fermentation of soy sauce through Japanese-type (JP) and Cantonese-type (CP) processes were compared. BA analysis revealed that the three most abundant BA species were putrescine， tyramine， and histamine in the later three stages (1187.68， 785.16， and 193.20 mg/kg on average， respectively). The BA profiles differed significantly， with CP samples containing higher contents of putrescine， tyramine， and histamine (P mine producers. The metabolic pathways for BA production were predicted. The high putrescine content in CP might be associated with the high abundance of Staphylococcus gallinarum (MAG8). This study provides a comprehensive understanding of the diversity and abundance of genes involved in BA synthesis， especially at the species level， during food fermentation.

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基于电网电压补偿的多电平变频器控制

辽宁工程技术大学学报（自然科学版） 2006年第4期25卷 571-573页

作者：潘爱先韦力张民青岛理工大学自动化学院青岛266033 西安科技大学电气与控制学院陕西西安710054

为了改善电网电压补偿效果,从主回路拓扑结构出发,以低压变频器规则采样法为基本理论,详细介绍了适合于多电平变频器控制的理论分析和算法推导过程,提出了一种基于电网电压补偿的多电平变频器控制方法,并给出了适合数字信号处理的采样... 详细信息

为了改善电网电压补偿效果,从主回路拓扑结构出发,以低压变频器规则采样法为基本理论,详细介绍了适合于多电平变频器控制的理论分析和算法推导过程,提出了一种基于电网电压补偿的多电平变频器控制方法,并给出了适合数字信号处理的采样原理和采样时序。根据电网电压的变化,实时调节输出电压,获得与闭环系统相同的理想机械特性和运行效果。该方法具有计算步骤简单、输出SPWM对称性好、精度高和控制方便的特点,适用于任何电平数目及拓扑结构。试验结果表明,和其他多电平控制方法相比,使用效果好,有很高的利用价值。

关键词：电网电压补偿多电平变频器采样 SPWM