检索结果-南通市图书馆

直岛冶炼厂三菱炼铜法中磁性氧化铁行为的控制

在线全文

学校读者我要写书评

暂无评论

中国有色冶金 2005年第6期34卷 9-13,36页

作者：宋佥中国科学技术大学安徽合肥230026

研究了三菱连续铜熔炼和吹炼工艺中所产生炉渣的微观组织与相图,以防止磁性氧化铁引发的一系列问题,诸如炉膛与流槽上的炉结积聚,熔体出口堵塞,渣粘度上升等等。根据这些研究结果,通过调整熔炼炉的硅酸盐渣中的二氧化硅和氧化钙含量以... 详细信息

研究了三菱连续铜熔炼和吹炼工艺中所产生炉渣的微观组织与相图,以防止磁性氧化铁引发的一系列问题,诸如炉膛与流槽上的炉结积聚,熔体出口堵塞,渣粘度上升等等。根据这些研究结果,通过调整熔炼炉的硅酸盐渣中的二氧化硅和氧化钙含量以及吹炼炉的铁钙渣中的氧化钙含量,以达到降低、稳定弃渣含铜量,减少熔体出口及流槽的清理之目的。然而,这些改动有可能降低希望的炉结保护层厚度,从而缩短炉寿命。因此,开发了一种估测熔体内磁性氧化铁含量的方法,并将炉渣成分与温度控制在适当范围内,从而延长炉寿命,避免磁性氧化铁引发的问题。

关键词：铜精矿三菱法炉渣磁性氧化铁控制

Relationship with spatial memory in diabetic rats and protein kinase Cγ,caveolin-1 in the hippocampus and neuroprotective effect of catalpol

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2014年第5期127卷 916-923页

作者： Zhou Haicheng Liu Jing Ren Liyuan Liu Wei Xing qian Men Lili song Guirong Du Jianling Department of Endocrinology First Affiliated Hospital of Dalian Medical University Dalian Liaoning 116011 China

Background The mechanisms underlying diabetic encephalopathy are largely unknown,and no effective treatments are *** has received much attention due to its numerous biological effects,especially in neuroprotective *** aim of this study was to investigate the effects of catalpol on cognitive functions in diabetic rats and the underlying *** A rat model of diabetes was established by streptozotocin injection,followed by intraperitoneal infusion of catalpol after 10 *** weeks later,the Morris water maze was used to test the spatial learning *** staining was performed to evaluate the morphological changes in the *** of protein kinase Cy （PKCy） and caveolin-1 （Cav-1） in the hippocampus were assessed by reverse transcription PCR and Western *** of anti-oxidative enzymes such as glutathione （GSH）,superoxide dismutase （SOD） and catalase （CAT） and levels of malonaldehyde （MDA） were measured using commercial *** Significant hippocampal neuronal injury was observed in rats with streptozotocin-induced ***,cognitive dysfunction was associated with markedly increased oxidative stress in the *** treatment significantly attenuated cognitive deficits,neuronal damage,and oxidative stress in the brain of diabetic *** analyses showed that catalpol reversed the down-regulation of PKCγ and Cav-1 expression in the diabetic *** Spatial memory in diabetic rats is associated with the expression of PKCy and *** treatment markedly attenuated oxidative stress,reversed the alteration of PKCy,Cav-1 and spatial memory deficits.

关键词： catalpol diabetic encephalopathy protein kinase Cγ caveolin-1

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

EUV波段CCD相机及其空间分辨率测试

光学精密工程 2005年第Z1期13卷 56-59页

作者：巩岩宋谦叶彬浔中国科学院国家天文台

研究了EUV波段CCD相机及其空间分辨率测试。EUV波段相机由荧光屏、MCP像管、光锥和可见光CCD构成,CCD像元大小为14μm,像元数2 048×2 048。在北京同步辐射装置光束线软X射线光学实验束线站3W1B上,利用透射网栅法对相机进行了空间分辨... 详细信息

研究了EUV波段CCD相机及其空间分辨率测试。EUV波段相机由荧光屏、MCP像管、光锥和可见光CCD构成,CCD像元大小为14μm,像元数2 048×2 048。在北京同步辐射装置光束线软X射线光学实验束线站3W1B上,利用透射网栅法对相机进行了空间分辨率测试,结果显示这种结构的CCD相机在17.1 nm波长处,空间分辨率达到19μm,相当于极限分辨率为26 lp/mm。

关键词： EUV MCP CCD 空间分辨率

Monitoring traveling ionospheric disturbances using the GPS network around China during the geomagnetic storm on 28 May 2011

在线全文

学校读者我要写书评

暂无评论

Monitoring traveling ionospheric disturbances using the GPS ...

Comparison of a five-year clinical outcome between Chinese women and men with de novo coronary disease treated with implantation of a drug-eluting stent： a three-center, prospective, registry study

中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： song qian DING Feng WAN WeiXing NING BaiQi ZHAO Biqiang CAS Key Laboratory of Ionospheric Environment Institute of Geology and GeophysicsChinese Academy of Sciences Beijing National Observatory of Space Environment Institute of Geology and GeophysicsChinese Academy of Sciences University of Chinese Academy of Sciences

Larger-scale traveling ionospheric disturbances(LSTTDs) are studied using the total electron content(TEC) data observed from 246 GPS receivers in and around China during the medium storm on 28 May *** is the first attempt to get the two-dimensional TEC perturbation maps in *** LSTID events are detected:one is in southwestern China before midnight propagating from low to middle latitude to the distance of about 1200 km with the phase front extending to about 500 km, and the other is in northeastern China after midnight propagating from middle to low latitudes to the distance of about 1200 km with the phase front extending to nearly 1400 *** using the multichannel maximum-entropy method,we get the propagation parameters of these two *** LSTID that occurs before midnight has a higher horizontal phase velocity and a larger damping rate corresponding to the after midnight LSTID,and this may be caused by the relatively large vertical background TEC and high atmospheric temperature in the southwest of China before *** to the variations of magnetic H component observed in high latitudes,the source region for the after midnight LSTTD is likely to be located 1400-2600 km east of 140°E and north of 42°N;the before midnight LSTID is propably excited by the atmospheric gravity waves(AGWs) generated by the Joule heating of the equatorial electrojet.

关键词： GPS large scale traveling ionospheric disturbances atmospheric gravity waves total electron content

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Medical Journal 2012年第1期125卷 7-11页

作者： CHEN Shao-liang YE Fei ZHANG Jun-ie LIN song TIAN Nai-liang LIU Zhi-zhong qian Xue-song DING Shi-qing Division of Cardiology Nanjing First Hospital Nanjing Medical University Nanjing Jiangsu 210006 China Division of Cardiology Zhangjiagang People＇s Hospital Zhangjiagang Jiangsu 300078 China Division of Cardiology Xinhua Hospital Huainan Anhui 502743 China

Background The gender-based differences in adverse events after drug-eluting stent （DES） implantation between Chinese women and men have not been fully studied. The present study aimed to compare the 5-year clinical outcome after DES implantation in Chinese women and men. Methods Chinese women （n=298） and men （n=698） with newly diagnosed de novo coronary lesions were studied after DES implantation. The primary endpoint was the occurrence of major adverse cardiac events （MACEs） over a 5-year follow-up, including myocardial infarction （MI）, cardiac death, and target vessel revascularization （TVR）. Propensity score matching （PSM） was used to compare the adjusted MACE rates between sexes. Results Women differed in body habitus and had increased fasting cholesterol. Fewer women presented with MI, and they had better cardiac function with less complex disease. The unadjusted rate of MI at 3 years （2.1%） and 5 years （5.0%） and MACE （25.2%） at 5 years in men was significantly higher than that of women （0.3%, 1.0% and 17.8%, P=0.050, P=0.032, and P=0.011, respectively）. After PSM, the adjusted adverse events between sexes were similar. The stent thrombosis rate rapidly increased after 2 years in men. Conclusions There were significant gender-based differences in baseline characteristics. Chinese men had equivalent outcomes to women after DES after adjustment by PSM. The increased rate of MI in men was attributed to an increased unadjusted rate of MACE.

关键词： drug-eluting stent major adverse cardiac event," stent thrombosis," propensity score matching

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

水网密集区粘土路基当量回弹模量的预估分析

土木建筑与环境工程 2011年第2期33卷 38-44页

作者：邱欣杨青钱劲松浙江师范大学工学院浙江金华321004 同济大学交通运输工程学院上海201804

基于非饱和土基本理论,利用基质吸力及土水特征曲线的最新研究成果,对受地下水位控制的粘土路基的平衡湿度状态进行了预估分析;同时采用室内重复动三轴试验方法,建立了非饱和粘性路基土动回弹模量的双线性本构经验预估模型。将上述研究... 详细信息

基于非饱和土基本理论,利用基质吸力及土水特征曲线的最新研究成果,对受地下水位控制的粘土路基的平衡湿度状态进行了预估分析;同时采用室内重复动三轴试验方法,建立了非饱和粘性路基土动回弹模量的双线性本构经验预估模型。将上述研究成果相结合,创建了综合考虑路基湿度和应力状态的路基当量回弹模量的预估方法,并结合实体工程建立了以地下水位、路基填筑高度为核心的路基当量回弹模量预估方程。通过与试验路上传统测试方法测试结果的对比分析,表明该评价方法具有准确、可靠特点。研究成果从平衡湿度和应力状态耦合控制的角度,对水网密集区粘土路基当量回弹模量的确定提供了新的视角和途径。

关键词：粘土路基平衡湿度回弹模量预估方程

氮氧化硅/聚合物混合集成低功耗可变光衰减器

在线全文

学校读者我要写书评

暂无评论

光子学报 2015年第6期44卷 70-75页

作者：宋倩倩雷建平陈开鑫电子科技大学通信与信息工程学院四川省宜宾市61902部队

利用具有相反热光特性的氮氧化硅与聚合物材料，采用混合集成波导结构设计了一种低功耗S型可变光衰减器．该衰减器以聚合物为芯层材料，氮氧化硅为包层材料，在弯曲波导上方制作加热电极从而通过热光效应来实现可调谐的衰减功能．理论... 详细信息

利用具有相反热光特性的氮氧化硅与聚合物材料，采用混合集成波导结构设计了一种低功耗S型可变光衰减器．该衰减器以聚合物为芯层材料，氮氧化硅为包层材料，在弯曲波导上方制作加热电极从而通过热光效应来实现可调谐的衰减功能．理论分析表明，对于1．55／xm的工作波长，衰减器实现50dB的衰减仅需要3．6mW的功率．实验结果可实现0～40dB的衰减范围，相应的最大温度变化为70．4℃，器件插入损耗为5．4dB．

关键词：可变光衰减器热光原理混合集成氮氧化硅聚合物 S弯曲波导

跳扩散模型中具有成比例交易费的最优投资消费模型

在线全文

学校读者我要写书评

暂无评论

高校应用数学学报（A辑） 2005年第3期20卷 253-264页

作者：钱晓松扬州大学数学科学学院

研究在跳扩散模型中一类最优投资消费问题.假定市场由无风险债券和一种风险股票构成且具有成比例的交易费,在限制卖空股票和借款的条件下,证明了该问题的值函数为相应HJB方程惟一的带状态空间约束的粘性解.

关键词：跳扩散模型交易费积分微分方程粘性解

在线全文

学校读者我要写书评

暂无评论

玉皇蘑特殊基质液体发酵及马铃薯蛋糕制作

食品研究与开发 2017年第23期38卷 105-109,145页

作者：王谦宋倩张正河北大学生命科学学院河北保定071002

将葡萄干作为特殊基质,通过正交试验对玉皇蘑特殊液体发酵配方与培养条件进行优化,确定最优液体发酵配方与培养条件,在此条件下玉皇蘑发酵液的菌球鲜重达到了35.76 g/100 mL,其多糖含量与蛋白含量分别达到4.82、7.15 mg/mL。然后用此发... 详细信息

将葡萄干作为特殊基质,通过正交试验对玉皇蘑特殊液体发酵配方与培养条件进行优化,确定最优液体发酵配方与培养条件,在此条件下玉皇蘑发酵液的菌球鲜重达到了35.76 g/100 mL,其多糖含量与蛋白含量分别达到4.82、7.15 mg/mL。然后用此发酵液代水拌料制作马铃薯蛋糕,通过试验分析确定蛋糕的最佳配方为:马铃薯全粉30 g,低筋面粉70 g,玉皇蘑发酵液90 mL,糖80 g,鸡蛋140 g。与传统蛋糕相比,该新型蛋糕的营养价值高,口感优良,同时具有独特的天然香气。

关键词：玉皇蘑液体发酵马铃薯蛋糕工艺优化