Oracle中实现定时任务的分析与应用

对Oracle Job Queue进行介绍与分析,提供在Oracle中实现定时任务的步骤和方法,并通过一个应用实例进一步加以阐述,对Oracle定时任务异常时的现象及处理办法进行总结.     

牙龈炎、牙周炎患者龈沟液和血清中白细胞介素-8的含量及其与牙周指数的相关性

目的研究白细胞介素-8(IL-8)在牙周炎和牙龈炎中的来源,以及与临床指数间的相关性。方法采用双抗夹心酶联免疫吸附法(ELISA)测定成人牙周炎、牙龈炎患者及正常对照者龈沟液(GCF)及血清中的IL-8含量。结果①牙周炎患者GCF中IL-8含量明显高于对照组GCF中的含量(P<0.001)及牙周炎患者血清中的含量(P<0.001),与牙龈炎患者GCF中的含量无显著性差异(P>0.05);②牙龈炎患者GCF中IL-8含量高于对照组GCF中的含量(P<0.05);③牙周炎患者GCF中IL-8含量与探诊出血指数(BI)、牙周袋深度(PD)、附着丧失(AL)呈正相关关系(P<0.05)。结论IL-8主要来源于牙龈组织局部;在牙周炎的发生过程中IL-8并没有参与骨吸收;牙周炎患者GCF中IL-8水平与PD、BI、AL呈正相关关系。     

Depression and oxidative damage in TNM stage Ⅲ patients with poorly differentiated gastric adenocarcinoma

Objective To investigate the association between psychological stress and oxidative damage in TNM stage Ⅲ patients with poorly differentiated gastric adenecarcinoma (GA). Methods One hundred and six patients with newly diagnosed poorly differentiated GA were assessed using the Hamilton Depression Rating Scale (HAMD), Zung Self-rating Depression Scale (SDS), Zung Self-rating Anxiety Scale (SAS), Symptom Checklist 90 (SCL-90), activities of daily living (ADL) and other multiple-item qnestionnaires. Oxidative-stress-related parameters in serum and the expression of DNA repair genes were monitored during a pretreatment period. Results The patients were divided into depression and nondepression groups (Groups A and B, respectively) based on a HAMD score cutoff of 20. The mean SDS, SAS, SCL-90, ADL and passive coping scores were higher in Group A, whereas social support and quality of life were lower. Serum total antioxidant capacity, eatalase, superoxide dismutuse concentrations and anti-superoxide anion capacity (A-ASC) were significantly decreased in Group A, whereas serum malondialdehyde (MDA) and 8-hydroxy-deoxyguanosine (8-OHdG) levels were significantly increased. Pearson correlation analysis revealed that depression was pesitively correlated with MDA, SAS, SCL-90 and ADL, but negatively correlated with A-ASC. Furthermore, real-time PCR revealed that the expression levels of hOGG1 and APEX1 were increased in Group A. Conclusion Psychological stress might be related to impaired antioxidant system in patients with GA, and it presents the first evidence of the involvement of oxidative DNA damage in the pathogenesis of depression.     

细胞因子在小儿肾脏病发病机制中的作用

目的　探讨白介素 (IL) 6、8、1 0在小儿肾脏病发病机制中的作用、相互关系及与细胞免疫的关系。方法　采用双抗体夹心ELISA法检测 65例肾小球疾病患儿血清IL 6、8、1 0水平 ,McAb A E法检测 54例患儿T细胞亚群。结果　各型肾小球疾病患儿血清IL 6水平降低 ,IL 8、1 0水平升高 ,CD4+细胞及CD4+/CD8+比值均降低 ,IL 1 0水平与CD4+细胞呈负相关 ,血清IL 6、8、1 0分别与尿蛋白定量无相关性。结论　在小儿肾脏病中 ,①血清IL 6水平降低 ,可能是继发性改变 ;②血清IL 8、1 0水平升高 ,参与了肾小球疾病的发生 ;③CD4+细胞、CD4+/CD8+比值降低 ,是肾小球疾病发病的主要原因 ;④血清IL 1 0水平升高 ,与CD4+细胞呈负相关 ,抑制细胞免疫 ,导致免疫功能紊乱。     

中运量轨道交通选型研究——结合深圳轨道8号线工程实践

随着轨道交通技术的不断进步,轨道制式不断创新,各制式均有其特点及适用范围。结合深圳轨道8号线工程实践,重点分析轮轨B型车与直线电机两种中等运量轨道制式的适用性,并结合8号线工程造价、运营成本、环境影响、与城市发展衔接等因素,提出采用B型车制式的建议。     

病因模拟法建立小儿厌食症动物模型

采用病因模拟法建立小儿厌食症动物模型。方法　用鱼松、奶粉、黄豆粉、白糖、鸡蛋等市售食品按比例配制特制饲料喂养幼龄大鼠建立动物模型 ,观察对大鼠摄食量、体重及下丘脑和血浆八肽胆囊收缩素 ( CCK- 8)浓度的影响 ,同时对特制饲料与常规鼠饲料的主要营养成分进行对比。结果　模型大鼠日摄食量明显低于对照组 ,体重增长缓慢 ,下丘脑和血浆八肽胆囊收缩素水平显著升高。特制饲料多种矿物质及多种维生素含量低下。结论　该模型符合小儿厌食症的自然病因和主要临床表现 ,状态稳定 ,基本成功     

Monte Carlo Simulation of Electron Swarms Parameters in c-C4F8/CF4 Gas Mixtures

The swarm parametes for c-C4F8/CF4 mixtures, including the density-normalized effective ionization coefficient, drift velocity and mean energy were calculated using Monte-Carlo method with the null collision technique. The overall density-reduced electric field strength could be varied between 150 and 500 Td,while the c-C4F8 content in gas mixtures is varied in the range of 0-100%. The value of the density-normalize deffective ionization coefficient shows a strong dependence on the c-C4F8 content, becoming more electronegative as the content of c-C4F8 is increased. The drift velocity of c-C4F4/CF4 mixtures is more affected by CF4. The calculated limiting field strength for c-C4F8/CF4 mixtures is higher than that of SF6/CF4.     

A study of the response of chlorophyll-a biomass to a winter upwelling event off Western Iberia using SeaWiFS and in situ data

Observations of a winter upwelling event off Western Iberia shelf/slope in the area of influence of the Western Iberia Buoyant Plume (WIBP) were conducted in February 2000. Spatial patterns and time evolution of the chlorophyll-a (chl-a) biomass are analysed, based on in situ and satellite data. SeaWiFS-derived chl-a concentration L2 products were used to track the chlorophyll front and estimate its westward migration velocity (maximum up to 29 km day⁻¹), as well as to characterize the frontal system and its evolution. A method associating the type of spectral signature of a pixel to the fraction of chlorophyll probed by SeaWiFS enabled the estimation of the chl-a biomass within error intervals. High chlorophyll concentrations (for wintertime) were observed over the shelf and slope, up to large distances to the coast. Due to the WIBP, a shallow Ekman layer developed, being nearly coincident with the stratified upper meters. The transport comprised westward advection and stretching of the plume, with little entrainment with the offshore deep mixed layer waters. The relative enlargement of the total area of the Inside-Front Zone (IFZ) during the upwelling event was roughly accompanied by the maintenance of the average biomass per unit of area, considering the water column up to depths of interest. This suggests that there was a net increase of chl-a biomass inside the water column associated with the IFZ, roughly proportional to the increase in the IFZ area. Retention of phytoplankton in the shallow stratified nutrient-rich waters of the WIBP was a key factor for this increase in chl-a biomass.     

新一代8000车级超巴拿马汽车滚装船船型分析

新一代8000车级超巴拿马汽车滚装船是可到访日本关键港口的最大汽车滚装船,具有少压载水、多装车量满载出港的优点。目前全球仅有英雄系列和新视野系列这2型8000车级超巴拿马汽车滚装船。从主尺度、总布置、航速与EEDI、支柱和跳板/坡道配置等主要方面阐述了这2型船,并比较了各自的优点。最后,指出了可针对航运公司的运营理念进一步优化开发8000车级超巴拿马汽车滚装船。     

构建网络中心战体系结构

美军正围绕网络中心战，将冷战时期作战结构向21世纪新的作战样式转型。网络中心战是在大量分析信息网络技术的性能改善和效能提高的基础上而提出的一个新概念，这个概念在反恐战争中得到越来越多的体现，二战以来，以从未有过的方式改变着战争的作战原则、战术和兵力结构。分析在构建有效的网络中心战基础结构时面临的挑战，研究Oracle公司针对这些挑战所做出的响应。