Data-driven Health Status Prediction of the Hydraulic Turbine Governing System

水轮机调速系统是水轮发电机组的关键控制系统。运用故障树与专家系统相结合的方法对调速系统可能发生的故障进行诊断,并基于历史数据,挖掘与故障相关的可能因素,对专家系统无法解决的故障进行分析,构建了基于数据驱动的水轮机调速系统健康状态预测系统。The hydraulic turbine governing system is the key control system of the hydro-turbine generator unit. In this paper,the fault tree method and the expert system are combined to predict the potential faults of the governing system.Based on the historical data,a data-driven health status prediction system is developed for the hydraulic turbine governing system to detect the possible factors of the faults and analyze the unsolved faults

江苏宿迁市农业现代化发展问题研究

文章以宿迁市农业为研究对象,在界定农业现代化标准的基础上,指出宿迁市农业现代化发展中存在的问题,并提出了推动宿迁农业现代化发展的建议。2017年大学生实践创新训练项目计划项目;项目名称:江苏省农村电商背景下农产品流通标准体系构建研究;项目编号:2017NFUSPITP156;;全国高等学校农业经济管理类专业本科教学改革与质量建设研究项目;项目名称:基于产学研协同创新农林经济管理专业人才培养模式的研究;项目编号:NJX1609;;南京林业大学2016年校级“教学质量提升工程”建设项目;项目名称:《统计学》课程体系整体优化与教学内容改革的研究与实践;项目编号:00644-05-0104

我国中小体育用品生产企业产业集群集聚研究——以福建晋江运动鞋产业集群为实证

入世后,我国中小体育用品业面临着国外知名品牌企业的竞争威胁,引起了我国业内人士的高度重视;产业集聚战略已成为提升区域竞争力的重要措施之一。以晋江运动鞋行业为例证,分析了我国中小体育用品生产企业产业集群集聚竞争优势和形成条件

Analysis on the epidemiological characteristics of the sporadic cases with hepatitis E infection in the rural area in Jiangsu province

目的了解江苏省农村散发性戊型肝炎的流行病学特征。方法通过建立覆盖市、镇、村三级医疗卫生服务机构的疑似肝炎主动监测网络,系统全面地监测戊型肝炎病例的发病情况。结果主动监测网络的敏感性明显高于网络报告系统,能更加准确、全面地掌握戊肝的发病规律。结果显示戊型肝炎病例占疑似急性肝炎病例的26.7%,男性戊肝发病率高于女性(P<0.01);发病随着年龄增长而上升,多见35岁以上人群;全年均有发病,冬春季节较高;戊型肝炎病毒株HEV1、4型并存,但以HEV4型为主(92.5%)。结论疑似肝炎主动监测系统数据显示目前戊肝发病率有被低估的风险。To understand the epidemiological characteristics of the sporadic cases with hepatitis E infection in the rural area of Jiangsu province,the prevalence of hepatitis E infection was surveyed systemically and completely through the initiatively monitoring system for the suspected cases of hepatitis E covering the city,town and village levels of medical and health service organizations.It was found that the initiatively monitoring system for suspected hepatitis E cases reflected the incidence of hepatitis E more accurately and comprehensively and was proved to be more sensitive than the network reporting system.The cases with hepatitis E accounted to 26.7% of the suspected cases with acute hepatitis and they were more frequent in male than in female.The incidence of hepatitis E increased with advance of age and most of cases occurred with age over 35.Estimated incidence was stable on the whole year,but rose up in winter and spring.The HEV type 1 and type 4 co-existed,but the HEV type 4 was proved to be the main type(92.5%).From the above observations,it seems that the initiatively monitoring system for the suspected cases of hepatitis E may be under-estimated for the risk of the hepatitis E infection in rural area of Jiangsu province.国家高技术研究发展计划(863计划)(2006AA02A209)资

散发型戊型肝炎与急性乙肝临床特征比较

目的比较散发型急性戊型肝炎与乙肝临床特征。方法分析戊肝和急性乙肝间年龄、性别、肝脏损伤、症状体征以及病程的差异。结果急性肝炎病例中,戊型肝炎最常见(28.0%),急性乙肝次之(9.2%);戊肝平均发病年龄为56.3±13.1岁,急性乙肝为43.0±12.5岁,平均发病年龄戊肝较急性乙肝大(t=4.4723,P<0.0001),均为男性多发;两者常见的临床症状和体征基本相当,但戊肝患者黄疸症状更多见(P<0.05);戊肝病程较急性乙肝长(t=3.7249,P=0.0003);通过年龄性别进行1:1匹配分析,戊肝比急性乙肝对肝脏的损伤程度严重(t=3.5978,P=0.0019)。结论戊肝多见于中老年,急性乙肝多见于中青年,均为男性多于女性。临床特征比较戊肝较急性乙肝更为严重

我国淡水养殖乌鳢的类立克次体感染

2001-2002年,湖北省某养殖场发生一种导致养殖乌鳢(Ophiocephalus argus C)大规模死亡的突发性传染病.该病发病率为60％-70％,发病死亡率高达100％.病鳢腹部膨大,内脏器官出现&ldquo;粟粒&rdquo;样结节,肾脏肿大成5-10个乳白色、灰白色&ldquo;内瘤&rdquo;状物或溃烂成&ldquo;豆渣&rdquo;样.光学显微镜观察发现细胞内出现嗜酸性或嗜碱性内含物,内脏器官出现肉芽肿炎症、细胞大范围的变性和死亡;电子显微镜观察显示细胞内包含物为质膜包绕的类立克次体(RLO).RLO圆形或椭圆形,直径0.5-1.5&mu;m,具中心核区,胞

Blue Laser Diode Pumped Pr~(3+):YLF Visible Lasers

报道了蓝光激光二极管(ld)(中心波长约为444nM)单端纵向抽运掺镨氟化钇锂(Pr3+:ylf)的红光(640nM)和绿光(522nM)激光器。用单个棱镜作为抽运光束整形器,实验中红光最高输出功率为308.5MW,其相应的抽运阈值功率为46MW,斜率效率为47.5%;绿光这三个指标的值相应分别为193.4MW、162.3MW和37.1%。结果表明抽运光的整形提升了红、绿光的输出特性。Red(640 nm)and green(522 nm)lasers with Pr3+:YLF pumped by a blue laser diode emitting at about 444 nm in the longitudinal direction are reported.On the basis of the beam reshaping of the pump spot by aprism,the maximum output power,absorbed threshold pump power and slope efficiency of the red laser are 308.5 mW,46 mW and 47.5%,respectively.The three corresponding parameter values for green laser are 193.4 mW,162.3 mW and 37.1%,respectively.The results show that the shaped pump beam is beneficial to improve the output characteristics of these two visible laser emissions.国家自然科学基金(61275050); 博士点基金(20120121110034); 厦门市科技项目(3502Z20113004

Epidemiological characteristics of sporadic hepatitis E in the rural area of Dongtai,Jiangsu Province,China

目的分析2008-2011年江苏省某农村地区戊型病毒性肝炎流行病学特征。方法利用已建立的疑似肝炎症状监测系统主动发现戊型病毒性肝炎患者,并对其流行病学特征进行分析。结果 2008-2011年戊型肝炎所占急性病毒性肝炎比例为27.29%,成为第2个主要病毒性肝炎。戊型肝炎年平均发病率2.2/万,戊肝发病全年散发,冬春季节高发;男性发病率高于女性,发病率随年龄增长逐渐升高,发病平均年龄(55.48±14.32)岁。戊型肝炎病毒株HEV1、4型并存,以HEV4型为主(95.6%)。结论本地戊肝呈散发,中老年高发,男性多于女性,以HEV4型为主。In order to analyze the epidemiologic characteristics of hepatitis E in the rural area of Jiangsu Province during the period of2008-2011,an established monitoring system of suspected hepatitis was used to detect patients of hepatitis E.The study showed that hepatitis E cases accounted for 27.29% of the total acute hepatitis cases during this period,which indicated hepatitis E had become the second major hepatitis in the rural area of Jiangsu Province.The average annual incidence rate of hepatitis E was around 0.22‰.Hepatitis E was sporadic throughout the whole year,with a higher incidence in spring and winter.The morbidity of hepatitis E was higher in men than that in women and was rising with age.The average age of all cases is 55.48±14.32 years.The research also revealed that HEV of genotype 4was the major genotype in the rural area of Jiangsu Province which accounted for 95.6%,while the proportion of genotype 1was 4.4%.In conclusion,hepatitis E in the rural area of Jiangsu Province is sporadic throughout the whole year,and HEV of genotype 4is the major genotype.The incidence of hepatitis E is higher in the middle-aged and old people and it is higher in men than that in women.国家自然科学基金项目(81373061);; 江苏省科技支撑计划(社会发展)项目(BE2013723)资助~

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel