检索结果-南通市图书馆

Performance of pond–wetland complexes as a preliminary processor of drinking water sources

Journal of Environmental Sciences 2016年第1期28卷 119-133页

作者： Weidong Wang Jun Zheng Zhongqiong Wang Rongbin Zhang Qinghua Chen xinfeng yu Chengqing Yin Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Jiaxing Water Conservancy Investment Co. Ltd. Jiaxing 314033 China Jiaxing Jiayuan Water Supply and Drainage Co. Ltd. Jiaxing 314001 China

Shijiuyang Constructed Wetland（110 hm^2） is a drinking water source treatment wetland with primary structural units of ponds and plant-bed/ditch systems. The wetland can process about 250,000 tonnes of source water in the Xincheng River every day and supplies raw water for Shijiuyang Drinking Water Plant. Daily data for 28 months indicated that the major water quality indexes of source water had been improved by one grade. The percentage increase for dissolved oxygen and the removal rates of ammonia nitrogen, iron and manganese were 73.63%, 38.86%, 35.64%, and 22.14% respectively. The treatment performance weight of ponds and plant-bed/ditch systems was roughly equal but they treated different pollutants preferentially. Most water quality indexes had better treatment efficacy with increasing temperature and inlet concentrations. These results revealed that the pond–wetland complexes exhibited strong buffering capacity for source water quality improvement. The treatment cost of Shijiuyang Drinking Water Plant was reduced by about 30.3%. Regional rainfall significantly determined the external river water levels and adversely deteriorated the inlet water quality, thus suggesting that the ＂hidden＂ diffuse pollution in the multitudinous stream branches as well as their catchments should be the controlling emphases for river source water protection in the future. The combination of pond and plant-bed/ditch systems provides a successful paradigm for drinking water source pretreatment. Three other drinking water source treatment wetlands with ponds and plant-bed/ditch systems are in operation or construction in the stream networks of the Yangtze River Delta and more people will be benefited.

关键词： Pond–wetland combination Plant-bed/ditch system Constructed root channel technology Semi-subsurface flow wetland Weighted comprehensive water quality index

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Optimal Apparoch for Replacement Intervals of Warm Standby System

引用

Journal of Donghua University(English Edition) 2018年第1期35卷 82-85页

作者： yu xinfeng WU yutao QIU Hualei WEN Liang China Satellite Maritime Tracking and Controlling Department Jiangyin 214413China 65185 Unit of PLA Tieling 112611China Department of Management Engineering Mechanical Engineering CollegeShijiazhuang 050003China

The protection device with low price and high maintenance cost can be used for a long *** order to improve availability of protection system,a method of increasing redundancy and periodic replacement is ***,the equivalent model of cumulative failure probability was ***,the wasting time of the spare part is converted into the working time of the using *** the optimization objective,under the strategy of block replacement,the availability model in infinite period with the maximum availability and the cost model in finite period with the minimum cost are established *** this case,we seek out the optimum replacement interval and verify the applicability and validity of the model through contrast and ***,the paper gives a brief discussion of future research area about warm standby system maintenance.

关键词： mathematical model warm standby system block replacement preventive maintenance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Heat Treatment Temperature on Properties of Chinese Calcined Flint Clay Based Plastic Refractories

引用

China's Refractories 2009年第2期18卷 27-29页

作者： ZHANG Wei DAI Wenyong yu xinfeng LI Liang Plibrieo （Dalian） Industries Co. Ltd. Dalian 116600 China

Effects of different heat treatment temperatures on properties of Chinese calcined flint clay based plastic refractories were investigated using Chinese calcined flint clay as starting material, aluminum sulfate and fireclay as binding system. The results showed that with temperature rising, Chinese calcined flint clay based plastic refractories shrinked firstly and then expanded. The modulus of rupture （MOR） and the cold crushing strength （CCS） inereased firstly and then decreased from 110 ℃ to 600 ℃ , then increased obviously. Thermal expansion coefficient increased from 110 ℃ to 760 ℃, decreased from 760 ℃ to 1 300 ℃ , and increased from 1 300 ℃ to1500 ℃.

关键词： Chinese calcined flint clay based plastic refractories Fireclay Heat treatment temperature Thermal expansion coefficient

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The influence of different ROI selection methods on amygdala functional connectivity analysis

The influence of different ROI selection methods on amygdala...

引用

2014年浙江省医学会放射学学术年会

作者： Peiyu Huang xinfeng yu Minmin Zhang Department of Radiology the Second Affiliated Hospital Zhejiang University School of Medicine

Introduction Amygdala is an important structure related to various human brain functions,such as learning,memo原ry,emotion,*** communication between amygdala and other brain areas might lead to different kinds of neur...

关键词：

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

Posterior cingulate cortex and superior temporal gyrus are associated with a smoking cessation treatment outcome:an exploratory regional homogeneity analysis

Posterior cingulate cortex and superior temporal gyrus are a...

引用

2015年浙江省医学会放射学学术年会

作者： Chao Wang Peiyu Huang Zhujing Shen Wei Qian xinfeng yu Hualiang yu Minming Zhang Department of Radiology the Second Affiliated HospitalZhejiang University School of Medicine Department of Psychiatry the Second Affiliated HospitalZhejiang University School of Medicine

Compared to nonsmokers,smokers exhibit a number of potentially important differences in regional brain ***,associations between regional brain function and smoking cessation treatment outcomes have not been ***,we used a regional homogeneity(ReHo)method combined with functional magnetic resonance imaging(fMRI)to evaluate whether the local features of spontaneous brain activity prior to the target quit date is associated with the smoking cessation *** to quitters,relapsers displayed significantly decreased ReHo in bilateral posterior cingnlate cortex(PCC),as well as increased ReHo in left superior temporal gyrus(STG).Our results suggest that regional brainfunction variables have promise as predictors of smoking *** study provided novel insights into the neurobiological mechanisms underlying smoking relapse.A deeper understanding of the neurobiological mechanisms associated with relapse may result in novel pharmacological and behavioral interventions.

关键词：

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

IGFBP-3 promotes cachexia-associated lipid loss by suppressing insulin-like growth factor/insulin signaling

引用

Chinese Medical Journal 2023年第8期136卷 974-985页

作者： Xiaohui Wang Jia Li Wei Zhang Feng Wang yunzi Wu yulin Guo Dong Wang xinfeng yu Ang Li Fei Li Yibin Xie Department of General Surgery Xuanwu HospitalCapital Medical UniversityBeijing 100053China Department of Gastrointestinal Surgery Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijing 102218China Department of Pancreatic and Gastric Surgery National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Department of Pharmacology School of Basic Medical SciencesCapital Medical UniversityBeijing 100069China

Background:Progressive lipid loss of adipose tissue is a major feature of cancer-associated *** addition to systemic immune/inflammatory effects in response to tumor progression,tumor-secreted cachectic ligands also play essential roles in tumor-induced lipid ***,the mechanisms of tumor-adipose tissue interaction in lipid homeostasis are not fully ***:The yki-gut tumors were induced in fruit *** metabolic assays were performed to investigate the lipolysis level of different types of insulin-like growth factor binding protein-3(IGFBP-3)treated *** was used to display phenotypes of tumor cells and *** polymerase chain reaction(qPCR)analysis was carried out to examine the gene expression levels such as Acc1,Acly,and Fasn et ***:In this study,it was revealed that tumor-derived IGFBP-3 was an important ligand directly causing lipid loss in matured ***-3,which is highly expressed in cachectic tumor cells,antagonized insulin/IGF-like signaling(IIS)and impaired the balance between lipolysis and lipogenesis in 3T3-L1 *** medium from cachectic tumor cells,such as Capan-1 and C26 cells,contained excessive IGFBP-3 that potently induced lipolysis in ***,neutralization of IGFBP-3 by neutralizing antibody in the conditioned medium of cachectic tumor cells significantly alleviated the lipolytic effect and restored lipid storage in ***,cachectic tumor cells were resistant to IGFBP-3 inhibition of IIS,ensuring their escape from IGFBP-3-associated growth ***,cachectic tumor-derived ImpL2,the IGFBP-3 homolog,also impaired lipid homeostasis of host cells in an established cancer-cachexia model in *** importantly,IGFBP-3 was highly expressed in cancer tissues in pancreatic and colorectal cancer patients,especially higher in the sera of cachectic cancer patients than non-cachexia cancer ***:Our stu

关键词： Biomarker Cancer Cachexia Insulin-like growth factor binding protein-3 Lipid loss

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

高性能LTE终端通信协议栈缓存机制

引用

计算机应用与软件 2020年第3期37卷 96-100,137页

作者：于欣峰梁利平中国科学院微电子研究所北京100029 中国科学院大学电子与通信工程学院北京100029

针对LTE终端通信协议栈的处理过程中Cache缓存方式效率差,提出一种可以提高处理速度降低延时的数据缓存方式。通过利用便签式存储器(Scratch-Pad Memory,SPM)和直接内存存取方式(Direct Memory Access,DMA)的性能优势,将协议栈处理的过... 详细信息

针对LTE终端通信协议栈的处理过程中Cache缓存方式效率差,提出一种可以提高处理速度降低延时的数据缓存方式。通过利用便签式存储器(Scratch-Pad Memory,SPM)和直接内存存取方式(Direct Memory Access,DMA)的性能优势,将协议栈处理的过程中需要与处理器频繁交互的数据缓存到SPM中,实现在SPM中完成数据的包头压缩/解压、加密/解密和重组等协议功能处理,并通过DMA方式实现SPM与主存之间的数据搬运,减少处理器对大块连续数据的搬运,提高处理效率。该方式避免了CPU在通过Cache缓存方式进行数据交互容易发生缓存不命中的问题,从而提高了协议栈的数据处理效率。经过理论分析及实验对比,结果表明,在LTE协议栈处理过程中,采用SPM与DMA结合的数据缓存机制,相比Cache缓存方式可以使整体性能至少提升12.65%。

关键词： LTE 协议栈缓存空间管理 DMA 便签式缓存

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

夹紧力作用下镜面变形及夹紧重复性研究

引用

激光与光电子学进展 2015年第1期52卷 186-191页

作者：周连生于新峰张巍中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室吉林长春130033

利用有限元方法对运动学支撑夹紧力引起的镜片光学表面变形进行静力学分析,并应用Zernike多项式对镜片表面的变形进行了拟合。结果表明,夹紧力作用下镜片表面产生的几种主要像差为Defocus、Pri Trefoil和Pri Hexafoil。光学检测过程中,... 详细信息

利用有限元方法对运动学支撑夹紧力引起的镜片光学表面变形进行静力学分析,并应用Zernike多项式对镜片表面的变形进行了拟合。结果表明,夹紧力作用下镜片表面产生的几种主要像差为Defocus、Pri Trefoil和Pri Hexafoil。光学检测过程中,运动学支撑结构的重复装配误差可能会影响检测精度,因此分析了运动学支撑夹紧重复性对镜面面形的影响。以夹紧力大小、夹紧力径向位置、夹紧力周向位置变化引起的镜面表面峰谷(PV)值和均方根(RMS)值的变化作为评价夹紧重复性的依据。分析结果表明,镜片表面的PV值和RMS值变化不明显,说明所设计的运动学支撑结构在多次重复性的检测中允许装配过程存在一定的误差。

关键词：光学设计镜面变形运动学支撑夹紧力夹紧重复性有限元法 Zernike多项式

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

我国产业转型升级战略研究

引用

中国商论 2021年第21期 171-173页

作者：俞新峰杭州普浩商贸有限公司

经历了40多年的改革开放,我国制造业获得了长足发展,但是我国制造业也面临很多需要解决的问题,例如长期处于制造产业的末端,技术含量不高。为此,我国需要加强制造业的转型升级,促进制造业的再发展。本文以我国制造业转型升级战略为分析... 详细信息

经历了40多年的改革开放,我国制造业获得了长足发展,但是我国制造业也面临很多需要解决的问题,例如长期处于制造产业的末端,技术含量不高。为此,我国需要加强制造业的转型升级,促进制造业的再发展。本文以我国制造业转型升级战略为分析对象,首先介绍了我国制造业的概述,其次分析了我国制造业存在的问题,最后论述了我国制造业转型升级的对策,以推动我国制造业的转型升级。

关键词：制造业转型升级产业调整

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

光刻投影物镜恒温水套小比例模型的设计与性能测试

引用

激光与光电子学进展 2016年第8期53卷 140-145页

作者：彭海峰于新峰秦硕中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室超精密光学工程中心吉林长春130033 空军航空大学航空理论系吉林长春130022

恒温水套是光刻物镜工作环境温度控制系统的重要组成部分。为了研究恒温水套的关键参数与性能，设计了一个小比例水套模型。恒温温控系统对其提供±0．001℃的去离子水，通过对比三镜光机系统温度变化及热像差变化获取小比例水套的关键... 详细信息

恒温水套是光刻物镜工作环境温度控制系统的重要组成部分。为了研究恒温水套的关键参数与性能，设计了一个小比例水套模型。恒温温控系统对其提供±0．001℃的去离子水，通过对比三镜光机系统温度变化及热像差变化获取小比例水套的关键参数。实验数据表明，在加入热扰动且环境温度为22．06～22．16℃的情况下，三镜光机系统的内壁温度被控制在（22±0．01）℃以内，波像差在热扰动后迅速恢复至10．12nm，与装调完毕状态基本一致。由此可见，此种水套结构可以满足光刻投影物镜的温度控制要求，可在此基础上设计等比例恒温水套模型。

关键词：测量投影物镜恒温水套热像差温度测试

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：