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深圳市2013—2022年6~19岁人群主要呼吸道传染病流行趋势

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中国热带医学 2024年第2期24卷 184-189页

作者：罗日景温莹程雁鹏陈霓璇黄芳陈志高张振吕秋莹南方医科大学公共卫生学院广东广州510515 深圳市疾病预防控制中心广东深圳518055

目的分析2013—2022年深圳市6~19岁人群主要呼吸道传染病的流行特征及变化趋势,为开展防控工作提供参考。方法收集深圳市2013—2022年6~19岁人群流行性感冒(流感)、流行性腮腺炎(流腮)及水痘报告病例,采用描述性流行病学方法和Joinpoin... 详细信息

目的分析2013—2022年深圳市6~19岁人群主要呼吸道传染病的流行特征及变化趋势,为开展防控工作提供参考。方法收集深圳市2013—2022年6~19岁人群流行性感冒(流感)、流行性腮腺炎(流腮)及水痘报告病例,采用描述性流行病学方法和Joinpoint回归模型进行流行特征和发病率趋势变化分析。结果2013—2022年深圳市6~19岁人群流感、流腮和水痘的年平均发病率分别为961.44/10万、157.70/10万及664.34/10万。流感发病率呈上升趋势,年度变化百分比(annual percent change,APC)为52.88%(P0.05),水痘发病率APC分别为28.88%和−50.03%(P<0.05)。从季节分布上看,3种传染病发病均呈双峰分布,冬季(12月—次年1月)及春夏交际(4—6月)高发。6~<10岁人群报告3种传染病病例数占比超过60%。10~<15岁和15~19岁人群水痘发病占比呈上升趋势。15~19岁人群流感和水痘发病率上升速度最快,APC分别为77.89%和33.00%(P<0.05)。结论基于Joinpoint回归模型的趋势分析观察到2013—2022年深圳市6~19岁人群流感报告发病率呈上升趋势,水痘发病率呈“升-降”变化。6~<10岁儿童为主要发病人群,应继续推进小学的传染病防控工作,同时15~19岁人群的呼吸道传染病发病率的快速上升及10~19岁人群水痘发病占比升高,提示应对高年龄组未成年人群的免疫空白和集中住宿等影响因素开展干预。

关键词：流行性感冒流行性腮腺炎水痘流行特征 Joinpoint回归模型

Vertical structure of tidal currents in the Xuliujing Section of Changjiang River Estuary

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Acta Oceanologica Sinica 2023年第2期42卷 44-55页

作者： zhigao chen Ya Ban Xiaoye chen Dajun Li Shengping Wang Faculty of Geomatics East China University of TechnologyNanchang330013China Chongqing Academy of Metrology and Quality Inspection Chongqing401120China Nanjing White Shark Surveying and Mapping Technology Co. LtdNanjing210038China Key Laboratory of Marine Environmental Survey Technology and Application Ministry of Natural ResourcesGuangzhou510300China

Three long-term fixed acoustic Doppler current profilers were first used for investigating the vertical structure of tidal currents in Xuliujing Section of Changjiang River ***,three different periods(spring,summer and fall)were also considered for investigating seasonal *** semi-diurnal tides were the most energetic,with along-channel speed of up to 80 cm/s for M_(2)constituent,which dominates at all stations with percent energy up to 65%–75%during *** shape of tidal ellipses of the most energetic semi-diurnal constituent M_(2)showed obvious polarization of the flow paralleling to the riverbank,with the minor semi-axis being generally less than 20%of the major *** maximum velocity of mean current is appeared in top layers at all the three stations,and the velocity decreased with the *** seasonal variations of direction are also observed,which is probably caused by complex local topography since the erosion and deposition in *** vertical variation of four parameters of M_(2)ellipses,agreed well with the optimally fit frictional solutions in top and middle ***,there was an obvious difference between frictional model and observed data in the lower water *** are probably on account of stratification,which strengthens in summer and fall due to the freshening influence of the Changjiang River Estuary outflow.

关键词： vertical structure seasonal variations tidal current mean current acoustic Doppler current profiler Changjiang River Estuary

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DSQ水管倾斜仪信号随机噪声压制研究

大地测量与地球动力学 2024年第1期44卷 95-99页

作者：郭晓菲刘军陈志高吴林斌赵义飞彭驰徐春阳中国地震局地震大地测量重点实验室武汉市430071 武汉地震科学仪器研究院有限公司湖北省咸宁市437099

基于自适应噪声完备集合经验模态分解CEEMDAN和小波去噪,提出一种DSQ水管倾斜仪信号随机噪声压制方法。首先将信号进行CEEMDAN分解,得到若干个本征模态函数IMF,分解数量随不同信号噪声动态变化;然后计算每条IMF和原信号的相关性系数,对... 详细信息

基于自适应噪声完备集合经验模态分解CEEMDAN和小波去噪,提出一种DSQ水管倾斜仪信号随机噪声压制方法。首先将信号进行CEEMDAN分解,得到若干个本征模态函数IMF,分解数量随不同信号噪声动态变化;然后计算每条IMF和原信号的相关性系数,对处于系数阈值范围内的IMF作小波变换处理;最后执行线性重构,得到去噪后的信号。仿真和实际去噪实验结果表明,随机噪声压制效果明显,信号有效成分保留比率较高,优于其他同类方法。

关键词： DSQ水管倾斜仪随机噪声压制自适应噪声完备集合经验模态分解小波变换皮尔森相关系数

左心室辅助装置植入同期手术干预二尖瓣反流的荟萃分析

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临床心血管病杂志 2024年第1期40卷 69-75页

作者：王志华胡俊龙赵泽原李建朝陈志高李昭程兆云郑州大学华中阜外医院心外科郑州451464 郑州大学华中阜外医院体外循环科

目的:评价左心室辅助装置(left ventricular assist device, LVAD)植入同期行二尖瓣手术(mitral valve surgery, MVS)干预术前严重二尖瓣反流(mitral regurgitation, MR)对临床预后的影响。方法:检索PubMed、Embase、Cochrane Library、Web of Science数据库中建库起至2022年10月10日关于比较LVAD植入是否同期行MVS干预术前MR的文献。主要研究终点为全因死亡率,次要终点为术后MR复发、再入院等并发症。采用STATA 15.1软件进行统计学分析。结果:最终纳入7项回顾性队列研究,共5 504例患者,仅517例(9.4%)同期行MVS。荟萃分析显示,同期行MVS没有增加术后近、中期死亡率,MVS组、No-MVS组术后30 d全因死亡率分别为4.3%、4.9%;MVS组术后1年(RR=0.83,95%CI:0.65~1.08,P=0.384)、2年(RR=0.83,95%CI:0.66~1.03,P=0.446)和3年(RR=0.78,95%CI:0.62~0.97,P=0.162)全因死亡风险有下降趋势,但差异无统计学意义。同期行MVS没有增加术后中远期再入院的风险,MVS组术后1年(RR=0.33,95%CI:0.17~0.62,P=0.209)、2年(RR=0.34,95%CI:0.21~0.57,P=0.315)因心力衰竭再入院的风险明显下降,但差异无统计学意义。结论:LVAD植入同期行MVS干预术前严重的MR是安全可行的,没有增加术后近中期全因死亡率和再入院率,似乎可以降低术后中远期全因死亡和再入院的风险。

关键词：心力衰竭二尖瓣反流左心室辅助装置二尖瓣手术荟萃分析

国产第三代磁悬浮左心室辅助装置植入同期行二尖瓣成形术的初步评价

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中国循环杂志 2024年第3期39卷 242-248页

作者：王志华段晓夏赵泽原胡俊龙陈志高李建朝王保才程兆云郑州大学华中阜外医院心外科郑州451464 郑州大学华中阜外医院体外循环科郑州451464

目的:探讨国产第三代磁悬浮Corheart 6左心室辅助装置(LVAD)植入同期行二尖瓣成形术(MVP)的安全性及有效性。方法:回顾性分析2021年10月至2023年3月于郑州大学华中阜外医院接受Corheart 6 LVAD植入同期行MVP的终末期心力衰竭患者13例。... 详细信息

目的:探讨国产第三代磁悬浮Corheart 6左心室辅助装置(LVAD)植入同期行二尖瓣成形术(MVP)的安全性及有效性。方法:回顾性分析2021年10月至2023年3月于郑州大学华中阜外医院接受Corheart 6 LVAD植入同期行MVP的终末期心力衰竭患者13例。收集院内、随访时的死亡及并发症事件,观察患者的心肌损伤、肾功能、血液动力学和超声心动图指标变化。结果:13例患者围术期无死亡、无MVP相关并发症。平均随访(14.2±5.6)个月期间,11例(84.6%)完成随访,2例分别因新型冠状病毒肺炎、心脏骤停死亡,无中重度二尖瓣反流复发。与术前相比,患者术后24 h、72 h心输出量升高,中心静脉压、肺动脉收缩压(PASP)、平均肺动脉压(PAMP)降低,术后1周高敏心肌肌钙蛋白T升高,估算肾小球滤过率降低,差异均有统计学意义(P均0.017),而左心室舒张末期内径、PASP、PAMP降低差异均有统计学意义(P均<0.010)。结论:国产第三代磁悬浮Corheart 6 LVAD植入同期行MVP安全、可行,术后近中期无中重度二尖瓣反流复发,肺动脉压显著降低,血液动力学显著改善。

关键词：心力衰竭二尖瓣反流左心室辅助装置二尖瓣成形

Electricity resonance-induced phase transition of water confined in nanochannels

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Communications in Theoretical Physics 2024年第5期76卷 159-165页

作者： Yunqiu Ma zhigao Zhao Shaoqian Hao Jianlong Kou Jiang-Xing chen Institute of Condensed Matter Physics Zhejiang Institute of Photoelectronics&Zhejiang Institute for Advanced Light SourceZhejiang Normal UniversityJinhua 321004China Department of Physics Inner Mongolia UniversityHohhot 010021China Department of Physics Hangzhou Normal UniversityHangzhou 311121China

The phase transition of water molecules in nanochannels under varying external electric fields is studied by molecular dynamics *** is found that the phase transition of water molecules in nanochannels occurs by changing the frequency of the varying electric *** molecules maintain the ice phase when the frequency of the varying electric field is less than 16 THz or greater than 30 THz,and they completely melt when the frequency of the varying electric field is 24 *** phenomenon is attributed to the breaking of hydrogen bonds when the frequency of the varying electric field is close to their inherent resonant ***,the study demonstrates that the critical frequency varies with the confinement *** new mechanism of regulating the phase transition of water molecules in nanochannels revealed in this study provides a perspective for further understanding of the phase transition of water molecules in nanochannels,and has great application potential in preventing icing and deicing.

关键词： electricity resonance phase transition water molecules molecular dynamics simulations

Magnetism and work function of Ni-Cu alloys as metal gates

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Rare Metals 2012年第2期31卷 130-134页

作者： cheng, Yanming Zheng, Yongping Huang, Xu Zhong, Kehua chen, zhigao Huang, zhigao Department of Physics Fujian Normal University Fuzhou 350007 China

The magnetism and work function of pure Ni(001) and Ni-Cu slab alloys were investigated using first-principles methods based on density functional theory. The calculated results reveal that both magnetic moments and work functions of the alloys depend strongly on the surface orientation, but hardly on the distribution of doped Cu atoms for a given surface orientation. It is found that the doped Cu atoms have evident influence on the magnetic moment of Ni-Cu slabs, and the average magnetic moment of Ni atoms for Ni-Cu alloys decreases with increasing concentration of Cu atoms. Moreover, it is observed that the work function of Ni(001) is insensitive to the supercell thickness and the inner concentration of Cu atoms. In the meantime, the spin polarization is found to have an obvious role on the work function of the Ni-Cu alloys, which may give a new way to modulate the work function of the metal gate.

关键词： first principles magnetism work function

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基于实时数据采集的摆动力学综合实验

实验室科学 2024年第3期27卷 12-15页

作者：方思云吴雨珣游雁陈志高贾翠红冯卓宏福建师范大学物理与能源学院福建福州350117 福建师范大学物理学国家级实验教学示范中心福建福州350117

在单摆实验基础上,利用转动传感器设计了摆运动的综合实验。准确测量摆动过程中摆角、摆动角速度随时间变化状态,研究了小角度摆动情况下摆球的实时运动状态,验证了单摆小角度摆动的简谐运动,并通过数据拟合准确测定本地重力加速度为9.7... 详细信息

在单摆实验基础上,利用转动传感器设计了摆运动的综合实验。准确测量摆动过程中摆角、摆动角速度随时间变化状态,研究了小角度摆动情况下摆球的实时运动状态,验证了单摆小角度摆动的简谐运动,并通过数据拟合准确测定本地重力加速度为9.77 m/s^(2),百分误差仅为0.22%;同时,研究了大角度摆动时摆球的欠阻尼运动,并测定了摆动过程的空气阻尼系数为0.00224 s^(-1)。该方案通过瞬时量的测量实现了多个动力学知识点的探究,能够有效促进学生对相关知识的理解,激发学生探究运动过程中物理量变化规律的热情。

关键词：摆运动简谐振动欠阻尼运动重力加速度空气阻尼系数

Hydrogen induced room-temperature ferromagnetism in Co-doped ZnO: first-principles and Monte Carlo study

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Chinese Science Bulletin 2014年第26期59卷 3232-3238页

作者： Jian-Min Zhang zhigao chen Kehua Zhong Guigui Xu zhigao Huang College of Physics and Energy Fujian Normal University Fujian Provincial Key Laboratory of Quantum Manipulation andNew Energy Materials

The structural stability, vibrational and magnetic properties of hydrogen doped ZnO:Co have been studied by first-principles calculations based on density functional theory. Bond-center(BC) sites were identified to be most stable sites for hydrogen, the corresponding vibrational frequencies including anharmonic contributions were calculated. Its magnetic properties were investigated as well. The calculated results reveal that hydrogen could induce the change of electronic transfer, leading to a decrease of magnetic moment. However, the magnetic coupling between Co atoms is greatly strengthen. The results simulated by Monte Carlo method indicate that hydrogen can induce the Curie temperature to increase from 200 to 300 K.

关键词：蒙特卡罗法钴掺杂第一性原理氧化锌铁磁性第一原理计算氢室温