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叶色草蛉和丽草蛉的雌性生殖系统解剖学 被引量:2
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作者 陈天业 牟吉元 《昆虫知识》 CSCD 1995年第4期240-241,共2页
关键词 叶色草蛉 丽草蛉 生死系统 雌性 解剖
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苯对小鼠精子致畸作用的探讨
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作者 李顺民 李珊宗 李芝兰 《甘肃科技情报》 1995年第6期22-24,共3页
苯对小鼠精子致畸作用的探讨李顺民,李珊宗,李芝兰(兰州城关卫生防疫站730030)(兰州医学院卫生系730000)苯是一种强挥发性的有机溶剂,它对神经造血系统的染毒作用已得到肯定,但对生殖系统尤其是雄性生殖系统影响的... 苯对小鼠精子致畸作用的探讨李顺民,李珊宗,李芝兰(兰州城关卫生防疫站730030)(兰州医学院卫生系730000)苯是一种强挥发性的有机溶剂,它对神经造血系统的染毒作用已得到肯定,但对生殖系统尤其是雄性生殖系统影响的报导甚少。笔者利用两种品系小鼠进行... 展开更多
关键词 精子 致畸作用 中毒 生死系统
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Upper gastrointestinal cancer burden in Hebei Province, China: A population-based study 被引量:4
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作者 Dao-Juan Li Di Liang +4 位作者 Guo-Hui Song Yong-Wei Li Deng-Gui Wen Jing Jin Yu-Tong He 《World Journal of Gastroenterology》 SCIE CAS 2017年第14期2625-2634,共10页
AIM To investigate the incidence and mortality rates of upper gastrointestinal cancer(UGIC) in Hebei Province, China, and to identify high-risk populations to improve UGIC prevention and control.METHODS Data for UGIC ... AIM To investigate the incidence and mortality rates of upper gastrointestinal cancer(UGIC) in Hebei Province, China, and to identify high-risk populations to improve UGIC prevention and control.METHODS Data for UGIC patients were collected from 21 population-based cancer registries covering 15.25% of the population in Hebei Province. Mortality data were extracted from three national retrospective death surveys(1973-1975, 1990-1992 and 2004-2005). The data were stratified by 5-year age groups, gender and area(high-risk/non-high-risk areas) for analysis. The age-period-cohort and grey system model were used.RESULTS The crude incidence rate of UGIC was 55.47/100000, and the adjusted rate(Segi's population) was 44.90/100000. Males in rural areas had the highest incidence rate(world age-standardized rate = 87.89/100000). The crude mortality rate of UGIC displayed a decreasing trend in Hebei Province from the 1970 s to 2013, and the adjusted rate decreased by 43.81% from the 1970s(58.07/100000) to 2013(32.63/100000). The mortality rate declined more significantly in the high-risk areas(57.26%) than in the non-high-risk areas(55.02%) from the 1970 s to 2013. The median age at diagnosis of UGIC was 65.06 years in 2013. There was a notable delay in the median age at death from the 1970s(66.15 years) to 2013(70.39 years), especially in the high-risk areas. In Cixian, the total trend of the cohort effect declined, and people aged 65-69 years were a population at relatively high risk for UGIC. We predicted that the crude mortality rates of UGIC in Cixian and Shexian would decrease to 98.80 and 133.99 per 100000 in 2018, respectively.CONCLUSION UGIC was the major cause of cancer death in Hebei Province, and males in rural areas were a high-risk population. We should strengthen early detection and treatment of UGIC in this population. 展开更多
关键词 Upper gastrointestinal cancer INCIDENCE MORTALITY Age-period-cohort Grey system model
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基于排队论实现I/O高效存储
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作者 昊付坤 《中国电子商务》 2010年第5期112-113,共2页
I/O响应时间是衡量存储系统性能的重要指标,作为存储设备的服务器面对大量存储请求时,如何高效的响应满足需求是决定其品质的关键。本文基于此,抽象出I/O存储排队模型,通过分析经典存储请求的调度方法,对其性能进行评价,找出不... I/O响应时间是衡量存储系统性能的重要指标,作为存储设备的服务器面对大量存储请求时,如何高效的响应满足需求是决定其品质的关键。本文基于此,抽象出I/O存储排队模型,通过分析经典存储请求的调度方法,对其性能进行评价,找出不足,接着从新的角度,为最大满足用户不同需求,综合权衡,我们重新构建了基于优先规则的调度方法(有限源生死排队系统模型(M/M/s)),然后分析了的性能。 展开更多
关键词 有限源生死排队系统模型(M/M/s) 基于优先规则的调度方法
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The Challenge and promise of rare disease diagnosis in China 被引量:4
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作者 Xin Ni Tieliu Shi 《Science China(Life Sciences)》 SCIE CAS CSCD 2017年第7期681-685,共5页
Rare diseases are chronic and serious,featuring early onset at birth or in childhood,rapid deterioration and high mortality rate,which creates a burden on society and public health systems.Of the known rare diseases,8... Rare diseases are chronic and serious,featuring early onset at birth or in childhood,rapid deterioration and high mortality rate,which creates a burden on society and public health systems.Of the known rare diseases,80 percent are genetic in origin,and half of those affected worldwide are children.In China,the rare disease patients are over 10 million,and70 percent of the patients are children(Song et al.,2012;Liu et al.,2010). 展开更多
关键词 deterioration childhood burden children featuring promise birth mortality pediatric distinguished
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