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A survey on the epidemiology of trauma and China trauma care training in subtropical regions of Hainan Province

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Journal of Acute Disease 2018年第3期7卷 108-114页

作者： jiang-Ling Yao Chang-Xi Zhou Ji-Min Fu jian Fu Yun-Tao gu Zhu-Long Meng Lei Peng Zhong-Lin Zhou Trauma Center The First Affiliated Hospital of Hainan Medical CollegeHainan Province 570102China Nanlou Respiratory Diseases Department PLA General Hospital28 Fuxing RoadBeijing 100853China Hainan Medical College No.3 Xueyuan RoadHaikouHainan Province 570102China

Objective: To investigate the epidemiology of trauma patients in subtropical areas of Hainan Province and the improvement of the level of trauma treatment in China trauma care training (CTCT). Methods: From 01-01-2015 to 01-01-2016, the epidemiological data of 2476 patients with trauma were collected. From 01-01-2016 to 01-01-2017, 105 professional doctors and nurses in emergency surgery took part in CTCT, and their knowledge were compared before and after training. Results: There were 1656 male and 820 female trauma patients with 1614 cases in the middle and young age and 478 cases were the elderly. In terms of occupational distribution, 736 peasants, 574 workers and 458 retirees were involved. In May, the number of patients was the highest 332. October to January was the high-incidence season of trauma. In 24 hours a day: 11:00-13:00, 18:00-19:00, 23:00-03:00 were the high incidence periods. Referred to trauma sites, 904 cases of trauma happened on roads, 540 cases in family and 370 cases in restaurants or entertainment facilities. Through CTCT, the scores of the theoretical examination, the assessment of the trauma treatment skills and the field test scores of the emergency surgery practitioners were better than before (Pgulations, as well as emergency plans and other relevant strategies. CTCT training improves the level of theoretical knowledge and first aid skills of medical personnel involved in trauma treatment. Health departments and medical education departments may consider extending CTCT training and continuing educati

关键词： Epidemiology CTCT Training Trauma Subtropical

基于CAMAC总线的交替式数据采集及实时监控系统研究

维普期刊数据库评论

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维普期刊数据库

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核电子学与探测技术 2007年第1期27卷 53-56页

作者：魏沛杰顾正黄田永泰齐建文中国人民解放军炮兵学院四系合肥230031

进行了一种称为交替式数据采集及实时监控系统的研究。该系统不仅能实现以较高频率进行任意时间的数据采集,还能在放电过程中以图形方式实时显示等离子体的各种参数供实验人员在线分析及控制。

关键词： CAMAC交替式数据采集实时监控

改进的差异演化算法在MPPT扰动观察法中的研究

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电源技术 2012年第1期36卷 102-103页

作者：刘建军白建民郭伟顾勇河北北方学院信息科学与工程学院河北张家口075000 华北电网有限公司张家口供电公司河北张家口075000 河北建筑工程学院河北张家口075024

太阳电池最大功率跟踪(MPPT)控制方法有很多。例如:直线近似法、电压反馈法、扰动观察法、增量电导法、模糊控制、神经网络控制等。每一种MPPT控制策略均具有自身的特点。针对光伏电池的非线性特性,介绍了最大功率点跟踪的原理,并利用... 详细信息

太阳电池最大功率跟踪(MPPT)控制方法有很多。例如:直线近似法、电压反馈法、扰动观察法、增量电导法、模糊控制、神经网络控制等。每一种MPPT控制策略均具有自身的特点。针对光伏电池的非线性特性,介绍了最大功率点跟踪的原理,并利用改进的差异演化算法对扰动观察法进行了改进,减少了扰动观察法的震荡过程,确保了光伏阵列稳定地工作在最大功率点附近。仿真结果证明,利用该差异演化算法改进的MPPT,具有良好的适应性。

关键词：光伏发电最大功率跟踪改进的差异演化算法扰动观察法

B2GRU: Boosted Bidirectional Gated Recurrent Unit for Remaining Useful Life Prediction of Mechanical Bearings

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B2GRU: Boosted Bidirectional Gated Recurrent Unit for Remain...

第35届中国过程控制会议

作者： Licheng Pan Rixin Su Hua Wu Zhenfeng gu Changwen Cui Zuobing Wang Xinli Huang Jiageng Chen jian Xu Xinggao Liu jiangnan Institute of Mechanical and Electrical Design and Research Jiuquan Satellite Launch Center School of Mathematical Sciences Zhejiang University

Modern industrial and production realms heavily rely on rotating machinery, in which mechanical bearings play a crucial role in ensuring equipment reliability and efficiency. Accurate prognostics of these bearings' Remaining Useful Life(RUL)can significantly impact the operational effectiveness of the entire machinery. Utilizing comprehensive vibration data, we developed a novel predictive framework by integrating Stacked AutoEncoders(SAE) for advanced feature extraction with a Boosted Bidirectional Gated Recurrent Unit(BiGRU) including Skip Connections for multi-scale joint prediction. This innovative approach, B2GRU, provides precise RUL predictions, significantly enhancing machinery reliability and efficiency while reducing operational downtime and costs. Our experimental results on the PRONOSTIA dataset validate the superior performance of BGRU over contemporary methods, achieving a substantial 42.9% decline in Root Mean Square Error(RMSE) compared to basic Artificial Neural Networks(ANN). This study highlights the robust capabilities of our model in feature extraction and model boosting mechanisms, demonstrating its effectiveness and suitability for RUL prediction of mechanical bearings.

关键词： Remaining Useful Life Prediction Mechanical Bearings Stacked AutoEncoders Gated Recurrent Unit Skip Connection Multiple Scale

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cnki会议

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赫尔巴特教育学在中国:一个跨越世纪的回望

教育学报 2006年第5期2卷 29-35页

作者：周谷平叶志坚浙江大学教育学院杭州310028

20世纪初,赫尔巴特及其学派教育学导入中国。特定的导入动机、导入路径和导入时机,使得我们在学习赫尔巴特教育学方面埋下了诸多的“先天不足”。1919年以后,中国学习别国教育学的主潮几经更迭,先是杜威的实验主义教育学,后是苏联的凯... 详细信息

20世纪初,赫尔巴特及其学派教育学导入中国。特定的导入动机、导入路径和导入时机,使得我们在学习赫尔巴特教育学方面埋下了诸多的“先天不足”。1919年以后,中国学习别国教育学的主潮几经更迭,先是杜威的实验主义教育学,后是苏联的凯洛夫教育学,由于缺乏对后二次学习与先前一次之间内在关联性的发现,学习杜威、学习凯洛夫成了变相批判赫尔巴特的过程,遂又导致对赫尔巴特甚至对整个教育学理论的学习都流于表层而无法深入。

关键词：教育思想史教育学赫尔巴特中国杜威凯洛夫

基于MLBF的毫米波双站SAR前视Omega-k成像算法

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红外与毫米波学报 2017年第4期36卷 490-497页

作者：马超张小虎杨建超顾红苏卫民南京理工大学电子工程与光电技术学院江苏南京210094

结合毫米波体制和双站毫米波合成孔径雷达(SAR)前视成像技术,开展毫米波双站SAR前视成像算法的研究.在双站SAR前视成像系统中,较大的前视角引入了多普勒质心偏移和严重的距离徙动,因此普通双站SAR的成像算法无法直接移植到双站SAR前视... 详细信息

结合毫米波体制和双站毫米波合成孔径雷达(SAR)前视成像技术,开展毫米波双站SAR前视成像算法的研究.在双站SAR前视成像系统中,较大的前视角引入了多普勒质心偏移和严重的距离徙动,因此普通双站SAR的成像算法无法直接移植到双站SAR前视成像中.针对以上问题,论文首先提出了一种基于瞬时多普勒分析的改进Loffeld's Bistatic Formula(MLBF)二维频谱求解方法,相比于现有方法,该方法能更准确的得到双站SAR前视回波信号的二维频谱.在此基础上又推导出了适用于毫米波双站SAR前视成像的Omega-k算法;最后通过仿真实验,验证了提出算法的有效性和优越性.

关键词：双站合成孔径雷达前视成像 MLBF Omega-k算法

Direct Electroless Nickel Plating on AZ91D Magnesium Alloy from a Sulfate Solution and its Deposition Mechanism

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材料热处理学报 2004年第05B期25卷 1098-1101页

作者： guChang-dong LIANjian-she LIguang-yu NIULi-yuan jianGZhong-hao TheKeyLabofAutomobileMaterials MinistryofEducationChinaCollegeofMaterialsScienceandEngineeringJilinUniversityNanlingCampusChangchun130025China

A bath of electroless plating Ni on the AZ91D magnesium alloy, containing sulfate nickel, was given in this paper. The nucleation mechanism of Ni-P deposits on the AZ91D magnesium alloy was studied by using XRD and SEM. The electroless Ni-P deposits were preferentially nucleated on the (Mg17Al12) phase and extended to the primary and eutectic a phases of the AZ91D magnesium alloy.

关键词：非电解淀积 AZ91D 镁合金硫酸盐溶液

NONLINEAR DYNAMICS RESPONSE OF CASING PIPE UNDER COMBINED WAVE-CURRENT

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应用数学和力学 2005年第8期26卷 951-956页

作者：唐友刚谷家扬左建立闵建琴 Department of Naval Architecture and Ocean Engineering School of Civil EngineeringTianjin University

The vortex-induced nonlinear vibration of casing pipes in the deep water was studied considering the loads of current and combined wave-current. The vortex-induced vibration equation of a casing pipe was set up considering the beam mode and Morison’s nonlinear fluid loads as well as the vortex-excited loads. The approach of calculating vortex-excited nonlinear vibration by Galerkin’s method was proposed. The natural vibration frequencies and modes were obtained, and the response including primary resonance induced by current and the composite resonance under combined wave-current for the 170 m long casing pipe in the 160m depth of water were investigated. The results show that the dynamics response of casing pipe obviously increases, and the complicated response behaviors of casing pipe are described under combined wave-current.

关键词：深水套管流体动力波流联合涡激振动组合共振

3-溴-1,1,1-三氟-2-丙醇辅助CO2与烯丙基缩水甘油醚偶联反应

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精细化工 2018年第6期35卷 1072-1076页

作者：马辉谷玉杰王博赵波毛伟吕剑西安近代化学研究所陕西西安710065 氟氮化工资源高效开发与利用国家重点实验室陕西西安710065

以烯丙基缩水甘油醚（AGE）、CO2为原料,以3-溴-1,1,1-三氟-2-丙醇（BTFP）为活化剂,以四丁基溴化铵（TBAB）为有机分子催化剂,经偶联反应合成4-烯丙氧甲基-1,3-二氧环戊-2-酮（AGC）。对四丁基季铵盐和活化剂种类进行了筛选,考察了反... 详细信息

以烯丙基缩水甘油醚（AGE）、CO2为原料,以3-溴-1,1,1-三氟-2-丙醇（BTFP）为活化剂,以四丁基溴化铵（TBAB）为有机分子催化剂,经偶联反应合成4-烯丙氧甲基-1,3-二氧环戊-2-酮（AGC）。对四丁基季铵盐和活化剂种类进行了筛选,考察了反应温度、活化剂BTFP与催化剂TBAB用量、反应压力、反应时间对产物收率的影响,并提出了可能的反应机理。采用GC-MS、FTIR、NMR对目标产物进行了表征。结果表明：BTFP用量为AGE物质的量的2.0%,TBAB用量为AGE物质的量的2.0%,无需任何反应溶剂,在90℃、0.5 MPa CO2压力下反应18 h,AGC收率可达96.5%。

关键词： 3-溴-1,1,1-三氟-2-丙醇二氧化碳烯丙基缩水甘油醚 4-烯丙氧甲基-1,3-二氧环戊-2-酮偶联反应精细化工中间体