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储热-火电耦合系统孤网运行电热特性研究

节能技术 2024年第1期42卷 88-92页

作者：豆中州王行姚莹莹苏程志杨晨玉国网吉林省电力有限公司电力科学研究院吉林长春132000

高寒地区传统的热电联产机组存在“热电耦合”现象,电网故障时会造成停机且无法供热。电锅炉加入后与火电机组构成的耦合系统能在孤网运行时带电热负荷稳定运行。于是本文基于电锅炉与火电联合系统模型与耦合系统孤网运行策略,分析了在... 详细信息

高寒地区传统的热电联产机组存在“热电耦合”现象,电网故障时会造成停机且无法供热。电锅炉加入后与火电机组构成的耦合系统能在孤网运行时带电热负荷稳定运行。于是本文基于电锅炉与火电联合系统模型与耦合系统孤网运行策略,分析了在电热负荷大范围变化时,关键参数主汽压和转速的变化规律,并给出了联合系统可承受热、电负荷的范围及保证机组安全运行的电、热负荷最大变化速率。

关键词：火电机组电锅炉孤网运行系统性能

胎儿心脏定量分析技术评估辅助生殖胎儿心脏形态和功能

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中国临床医学影像杂志 2024年第4期35卷 263-267页

作者：吴娟朱飞虎栗河舟要迎春刘云李亚敏郑州大学第三附属医院超声科河南郑州450052

目的:探讨胎儿心脏定量分析(fetal HQ)技术在辅助生殖技术(ART)胎儿心脏功能及形态评价中的应用价值。方法:本研究共纳入60例ART受孕胎儿(ART组),冻胚移植与鲜胚移植各30例,67例自然受孕胎儿(对照组)。应用fetal HQ软件计算得出整体球... 详细信息

目的:探讨胎儿心脏定量分析(fetal HQ)技术在辅助生殖技术(ART)胎儿心脏功能及形态评价中的应用价值。方法:本研究共纳入60例ART受孕胎儿(ART组),冻胚移植与鲜胚移植各30例,67例自然受孕胎儿(对照组)。应用fetal HQ软件计算得出整体球形指数(GSI)、左右心室整体应变值(GS)、面积变化分数(FAC)、24节段球形指数(SI)。应用Pearson相关性分析孕妇年龄、孕周、胎儿预估体质量、体质量指数、胎儿心率与心脏各参数的相关性。结果:(1)与对照组相比,ART组孕妇年龄更大、产次更少(P0.05)。(2)ART组胎儿与对照组比较GSI、GS、FAC、右室2~24节段SI值差异有统计学意义(P<0.05);按移植方式进行亚组分析,冻胚组与对照组GSI及右室GS、右室FAC存在差异;鲜胚组与对照组GSI、GS、FAC存在差异;冻胚组与鲜胚组右室GS、右室FAC存在差异(P<0.05)。(3)相关性分析显示孕妇年龄、孕次、产次、胎儿预估体质量、体质量指数、胎儿心率、孕周与心脏各参数之间均无相关关系。结论:fetal HQ可以反映ART胎儿心脏心功能变化、整体及各节段形态变化,为中孕期ART胎儿心脏改变的早期识别提供了一种新的评估方法。

关键词：胎儿心脏超声检查,产前

基于随机森林算法的混凝土浇筑仓内部最高温度预测

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水电能源科学 2024年第9期42卷 84-87页

作者：周俊杰樊仕文方晨黄耀英刘富昌山西大同抽水蓄能有限公司山西大同037400 三峡大学水利与环境学院湖北宜昌443002

为有效预测混凝土浇筑仓内部最高温度,引入随机森林算法,建立了基于随机森林算法的混凝土浇筑仓内部最高温度预测模型,结合西部某典型混凝土坝工程,收集高、低温季节浇筑仓实测温度,以冷却水管进出口水温、通水流量、浇筑仓层厚和环境... 详细信息

为有效预测混凝土浇筑仓内部最高温度,引入随机森林算法,建立了基于随机森林算法的混凝土浇筑仓内部最高温度预测模型,结合西部某典型混凝土坝工程,收集高、低温季节浇筑仓实测温度,以冷却水管进出口水温、通水流量、浇筑仓层厚和环境气温为输入,混凝土浇筑仓内部最高温度为输出,采用所建模型进行训练和优化。实例应用结果表明,与传统BP神经网络预测模型相比,基于随机森林算法的混凝土浇筑仓内部最高温度预测模型对混凝土内部最高温度预测具有更好的效果。

关键词：混凝土浇筑仓最高温度随机森林温度预测温控防裂

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The next step of community health construction: Traininggeneral practitioners and implementing health management

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Frontiers of Medicine 2010年第2期4卷 134-138页

作者： Kan ZHANG Wei DONG ying-yao CHEN Department of Medical Science&Technology&Education Shanghai Municipal Health BureauShanghai 20040China Department of Health Services Administration School of Public HealthFudan UniversityShanghai 200032China Department of Hospital Management School of Public HealthFudan UniversityShanghai 200032China

This article discusses the concept of health management and stresses that community health manage-ment should be the starting point of community health service,necessitating a paradigm shift from observing the treatment-oriented medical model to observing the pre-vention-and-health management-based medical *** health construction has entered a new phase,one which highlights the need to train general practitioners in practice-based life cycle health *** addition,general practitioners should assume the mission of implementing community health management.

关键词： community health general practitioners health management

Lanthanide Thiolate Complexes： Novel Initiators for Ring-opening Polymerization of ε-Caprolactone

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Chinese Journal of Chemistry 2005年第11期23卷 1541-1544页

作者： SUN, Hong-Mei LI, Huan-Rong yao, Chang-Sheng yao, ying-Ming SHENG, Hong-Ting SHEN, Qi The Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry and Chemical Engineering Suzhou University Suzhou 215006 China

The ring-opening polymerization （ROP） of ε-caprolactone （ε-CL） using lanthanide thiolate complexes [（CH3CsH4）2Sm（μ-SPh）（THF）]2 （1） and Sm（SPh）3（HMPA）3 （2） as initiators has been investigated for the first time. Both of 1 and 2 were found to be highly efficient initiators for the ROP of ε-CL. The poly（ε-caprolactone）（PCL） with molecular weight Mn up to 1.97 ×10^5 and relatively narrow molecular weight distributions （1.20〈MW/Mn〈 2.00） have been obtained in high yield in the temperature range of 35-65℃. According to the polymer yield, 2 showed much higher activity than 1. However, the number-average molecular weight of PCL obtained with 2 was much lower than with 1. The possible polymerization mechanism of the ε-CL polymerization has been proposed based on the results of the end group analysis of the ε-CL oligomer.

关键词： ring-opening polymedzation samarium thiolate complex catalysis ε-caprolactone

HER2放射性分子探针应用于肿瘤诊疗的研究进展

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分子影像学杂志 2024年第7期47卷 757-763页

作者：查圆郭旭高晓敏杨蕊姚荧南京医科大学无锡医学中心江苏南京211166 南京医科大学附属无锡市妇幼保健院药学部江苏无锡214002 江南大学医学院江苏无锡214002 无锡市妇幼保健院优生优育遗传医学研究所江苏无锡214002

人表皮生长因子受体2(HER2)在多种肿瘤中异常表达或突变,促进与细胞增殖和肿瘤发生相关的多种信号通路的启动,是肿瘤诊疗的重要靶点之一。核医学利用放射性示踪技术精确定位病灶,通过PET/SPECT显像技术实现肿瘤早期诊断及治疗监测。HER... 详细信息

人表皮生长因子受体2(HER2)在多种肿瘤中异常表达或突变,促进与细胞增殖和肿瘤发生相关的多种信号通路的启动,是肿瘤诊疗的重要靶点之一。核医学利用放射性示踪技术精确定位病灶,通过PET/SPECT显像技术实现肿瘤早期诊断及治疗监测。HER2放射性分子探针,包括抗体、小分子多肽、亲合体及锚蛋白重复蛋白等类型,正处于积极研发及临床前/早期临床研究阶段,为核医学领域研究热点之一。本文基于HER2放射性分子探针种类与乳腺癌、卵巢癌、胃癌等HER2阳性肿瘤疾病分类,对核医学技术应用于HER2阳性肿瘤诊疗的研究进展作一综述。

关键词： HER2 放射性分子探针核医学放射性核素乳腺癌卵巢癌胃癌非小细胞肺癌

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Double spatial confinement on ruthenium nanoparticles inside carbon frameworks as durable catalysts for a quasi-solid-state Li–O_(2) battery

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Carbon Energy 2023年第8期5卷 114-125页

作者： Meiling Wang ying yao Feiyang Yang Zhenwu Tang Jingjie Ren Cunzhong Zhang Feng Wu Xiangke Wang Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science&EngineeringBeijing Institute of TechnologyBeijingChina Beijing Institute of Technology Chongqing Innovation Center ChongqingChina College of Life and Environmental Sciences Minzu University of ChinaBeijingChina College of Environmental Science and Engineering North China Electric Power UniversityBeijingChina

The rational design of large-area exposure,nonagglomeration,and longrange dispersion of metal nanoparticles(NPs)in the catalysts is critical for the development of energy storage and conversion *** attention has been focused on modulating and developing catalyst interface contact engineering between a carbon substrate and dispersed ***,a highly dispersed ultrafine ruthenium(Ru)NP strategy by double spatial confinement is proposed,that is,incorporating directed growth of metal–organic framework crystals into a bacterial cellulose templating substrate to integrate their respective merits as an excellent electrocatalytic cathode catalyst for a quasi-solid-state Li–O_(2) *** porous carbon matrix with highly dispersed ultrafine Ru NPs is well designed and used as cathode catalysts in a Li–O_(2) battery,demonstrating a high discharge areal capacity of 6.82 mAh cm^(–2) at 0.02 mA cm^(–2),a high-rate capability of 4.93 mAh cm^(–2) at 0.2 mA cm^(–2),and stable discharge/charge cycling for up to 500 cycles(2000 h)with low overpotentials of~1.4 *** fundamental understanding of the structure–performance relationship demonstrates a new and promising approach to optimize highly efficient cathode catalysts for solid-state Li–O_(2) batteries.

关键词： bacterial cellulose cathode materials metal-organic frameworks Ru nanoparticles solid-state Li-O_(2)batteries

Multifunctional flower-like core-shell Fe/Fe_(4)N@SiO_(2)composites for broadband and high-efficiency ultrathin electromagnetic wave absorber

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Journal of Materials Science & Technology 2023年第1期132卷 90-99页

作者： Wanjia Li Wangchang Li yao ying Jing Yu Jingwu Zheng Liang Qiao Juan Li Shenglei Che College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Research Center of Magnetic and Electronic Materials Zhejiang University of TechnologyHangzhou 310014China

The nano-iron nitride soft magnetic material has excellent magnetic properties and is expected to be a brilliant electromagnetic wave ***,how to fully exploit its wave-absorbing potential re-mains a thought-provoking ***,we have synthesized Fe/Fe_(4)N@SiO_(2)nanomagnetic core-shell materials with different Fe/Fe_(4)N ratios by performing nitridation reactions at different ***,the flower-like core-shell Fe/Fe_(4)N@SiO_(2)structure was obtained by the etching ***,with the synergy of the excellent magnetic and dielectric losses,an outstanding absorption performance could be achieved with a minimum refection loss(RL min)of−71.31 dB at the matching thickness of 1.4 mm,and the widest effective absorption bandwidth(EAB max)of 6.1 GHz less than−10 dB was realized at 1.16 ***,this material also shows a preeminent advance in corrosion resistance to adapt to harsh ***,this iron nitride flower-like core-shell structure exhibits great potential in microwave absorption in harsh conditions.

关键词： Fe/Fe_(4)N@SiO_(2) Flower-like core-shell structure Multifunctions Ultrathin microwave absorber

Dysgerminoma and Gonadoblastoma with Para-aortic Lymph Node Metastasis in a Patient with Swyer Syndrome

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Chinese Medical Journal 2017年第15期130卷 1882-1883页

作者： ying yao Hao-Jie He Jin-Song Han Hong-Yan Guo Department of Obstetrics and Gynecology Peking University Third Hospital Beijing 100191 China

To the Editor：In June 2013,a 17-year-old patient was admitted to our hospital for a pelvic mass and primary *** patient＇s cousin had a similar clinical presentation without a definite *** examination revealed a phenotypic female with a slender body,poor mammary gland development,an infantile vulva,no pubic hair,and a normal-appearing vaginal orifice and vestibule.A hard and solid abdominal mass,approximately 12 cm in diameter,was *** vagina was approximately 3.0 cm in length with a blind end measured by cotton *** human chorionic gonadotropin （HCG）（40.64 mU/ml） and lactate dehydrogenase （LDH）（431 U/ml） levels were *** follicle-stimulating hormone （111 mU/ml） and leutinizing hormone （27.8 mU/ml） levels were also elevated,while the E2,T,and A levels were below the reference *** diurnal cortisol and adrenocorticotropic hormone （ACTH） levels were *** karyotype analysis was then done and revealed a result of *** computed tomography scan revealed multiple masses posterior to the uterus and involving the retroperitoneal abdominal aorta to the level of the left renal veins.

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