期刊文献+
共找到177篇文章
< 1 2 9 >
每页显示 20 50 100
CORRELATION BETWEEN THE NUMBER OF MITOTIC FIGURES AND THE PERCENTAGE OF Ki67-POSITIVE CELLS IN NON-HODGKIN’S LYMPHOMAS
1
作者 黄高升 FellerAC LennertK 《Chinese Medical Sciences Journal》 CAS CSCD 1994年第1期16-19,共4页
Proliferative activity in 106 cases of non-Hodgkin’s lymphoma was estimated using the monoclonal antibody Ki67 and by counting the number of mitotic figures. The percentage of Ki67-positive cells was compared with th... Proliferative activity in 106 cases of non-Hodgkin’s lymphoma was estimated using the monoclonal antibody Ki67 and by counting the number of mitotic figures. The percentage of Ki67-positive cells was compared with the median number of mitotic figures per square millimeter. Both Ki67 positivity and the number of mitotic figures were found to be greater in high grade than in low grade lymphomas, although there was an overlap between the two grades of malignancy. A close correlation was found between the number of mitotic figures and the percentage of Ki67-positive cells not only in all lymphoma typo taken together (r_s= 0. 834 . P<0. 001). but also in B-cell lymphoma (r_s= 0. 8 1 P< 0. 001) and T-cell lymphoma (r_s = 0. 764. P<0. 00 1) taken seprately. Thus, both methods are useful for the estimation of proliferative activity. but each method has its advantages and disadvantages. 展开更多
关键词 lymphma non-Hodgkin’s mitotic figures monoclonal antibody Ki67
下载PDF
The principal moments of inertia calculated with the hydrostatic equilibrium figure of the Earth
2
作者 Chengjun Liu Chengli Huang Mian Zhang 《Geodesy and Geodynamics》 2017年第3期201-205,共5页
As an indication of the Earth's mass distribution, the principal moments of inertia (PMOI, i.e., A, B, C) of the Earth are the basic parameters in studies of the global dynamics of the earth, like earth nutation, a... As an indication of the Earth's mass distribution, the principal moments of inertia (PMOI, i.e., A, B, C) of the Earth are the basic parameters in studies of the global dynamics of the earth, like earth nutation, and the geophysics. From the aspect of observation, the PMOI can be calculated from the spherical coefficients of observed gravity field. In this paper, the PMOI are calculated directly according to its definition with the figures of the Earth's interior derived by a generalized theory of the hydrostatic equilibrium figure of the Earth. We obtain that the angle between the principal axis of the maximum moment of PMOI and the rotational axis is 0.184~, which means that the other two principal axes are very closely in the equatorial plane. Meanwhile, B-A is 1.60 x 10-5 MR2, and the global dynamical flattening (H) is calculated to be 3.29587 ~ 10-3, which is 0.67% different from the latest observation derived value Hobs(3.273795 × 10 ^-3) (Petit and Luzum, 2010), and this is a significant improvement from the 1.1% difference between the value of H derived from traditional theories of the figure of the Earth and the value of Hobs. It shows that we can calculate the PMOI and H with an appropriate accuracy by a gener- alized theory of the hydrostatic equilibrium figure of the Earth. 展开更多
关键词 Principal moments of inertia (PMOI) Hydrostatic equilibrium figure The Earth's dynamical flattening
下载PDF
Figures in Wen's Government Report
3
《China Textile》 2009年第3期10-10,共1页
On March 5th,Premier Wen Jiabao delivered a report to the annual session of the National People’s Congress(NPC),covering a wide range of economic,financial and social issues.
关键词 over figures in Wen’s Government Report WILL NPC
下载PDF
The Comparative Study of Two Translated Texts on Huangdirent Translating Styles o'n s Internal Classics——Simple Analysis on the Diffe Culture-Specific Lexicon, Figure of Speech and Four-Chinese-Character Structures
4
作者 杨峥 《海外英语》 2017年第17期5-6,共2页
Huangdi's Internal Classics(Neijin) is one of the most important ancient medical classics, which plays far-reaching influence in medical field. More and more domestic and overseas scholars published their translat... Huangdi's Internal Classics(Neijin) is one of the most important ancient medical classics, which plays far-reaching influence in medical field. More and more domestic and overseas scholars published their translated texts on Neijing. Due to the diversity of editions and different understanding, the translating styles and contents are widely different. This study will focus on the different translating styles on culture-specific lexicon、figure of speech and four-Chinese-character structures in Neijin. 展开更多
关键词 Huangdi’s Internal Classics the comparative study of translated texts culture-specific lexicon figure of speech four-Chinese-character structures
下载PDF
Religious Figures on Dalai's Decision
5
《China's Tibet》 1995年第S1期13-17,共5页
ReligiousFiguresonDalai'sDecision¥TheDalai'sMayannouncementthataTibetanboywasthereincarnatedchildofthelate10... ReligiousFiguresonDalai'sDecision¥TheDalai'sMayannouncementthataTibetanboywasthereincarnatedchildofthelate10thBresentmentinCh... 展开更多
关键词 Religious figures on Dalai’s Decision
下载PDF
Some Facts and Figures on China's Social Development
6
《China Today》 1995年第1期16-16,共1页
SomeFactsandFiguresonChina'sSocialDevelopmentInthepast45yearsChinahasmaderemarkablegainsinsocialprogress,ast... SomeFactsandFiguresonChina'sSocialDevelopmentInthepast45yearsChinahasmaderemarkablegainsinsocialprogress,asthefollowingfactsa... 展开更多
关键词 some Facts and figures on China’s social Development
下载PDF
China's Arts and Crafts Playing Yueqin from Behind,clay figure of Huishan.
7
作者 XIE JUN 《China Today》 1996年第7期73-73,共1页
China'sArtsandCraftsPlayingYueqinfromBehind,clayfigureofHuishan.HuishanofWuxi,JlangsuProvince,hasanover400-y... China'sArtsandCraftsPlayingYueqinfromBehind,clayfigureofHuishan.HuishanofWuxi,JlangsuProvince,hasanover400-yearhistoryofmakin... 展开更多
关键词 China’s Arts and Crafts Playing Yueqin from Behind clay figure of Huishan
下载PDF
A BRIEF BIOGRAPHY OF PROFESSOR L. C. HSU In celabration of Professor Hsu for his 80's birthday
8
《Analysis in Theory and Applications》 2000年第3期1-9,共9页
关键词 A BRIEF biography OF PROFEssOR L HsU In celabration of Professor Hsu for his 80’s birthday
下载PDF
S波段宽带低噪声放大器的设计 被引量:6
9
作者 黄雷 张晓发 袁乃昌 《电子设计工程》 2017年第15期158-161,共4页
微波宽带低噪声放大器是雷达、电子对抗、微波通信及遥测遥控等接收系统的关键部件。为满足高性能微波接收机系统对微波低噪声放大器宽频带、低噪声系数、高增益和好平坦度等方面的要求。本文利用Infineon公司的BFP740FESD型双极晶体管... 微波宽带低噪声放大器是雷达、电子对抗、微波通信及遥测遥控等接收系统的关键部件。为满足高性能微波接收机系统对微波低噪声放大器宽频带、低噪声系数、高增益和好平坦度等方面的要求。本文利用Infineon公司的BFP740FESD型双极晶体管,采用纯电抗宽带匹配技术,设计了一个2~4 GHz宽带低噪声放大器(LNA)。经过实际测试,该放大器在2~4 GHz频带内,功率增益大于30 dB,噪声系数小于1.8 dB,增益平坦度小于3 dB,输入输出驻波比小于2,输出饱和功率大于5 dBm,且工作绝对稳定。 展开更多
关键词 低噪声放大器 宽带匹配 噪声系数 s波段
下载PDF
基于IDEF0方法的FMS功能模型构建 被引量:3
10
作者 席洪波 蔡安江 《组合机床与自动化加工技术》 2008年第2期73-75,79,共4页
IDEF0方法能够全面而清楚地描述FMS的数据流、物料流以及功能活动之间的联系,可以保证设计的规范性,并为系统的顺利实施奠定坚实的基础。以柴油机汽缸盖加工过程为实例阐述了FMS的构建过程,并用IDEF0方法建立了系统的功能模型图。采用ID... IDEF0方法能够全面而清楚地描述FMS的数据流、物料流以及功能活动之间的联系,可以保证设计的规范性,并为系统的顺利实施奠定坚实的基础。以柴油机汽缸盖加工过程为实例阐述了FMS的构建过程,并用IDEF0方法建立了系统的功能模型图。采用IDEF0方法进行FMS功能描述,能够满足这一复杂的大型系统分析与设计的要求。 展开更多
关键词 IDEFO FMs 柴油机汽缸盖 功能模型图
下载PDF
基于RM&S的小型动力电源的WSEIAC效能评估研究 被引量:1
11
作者 郑胜国 郭彦申 +1 位作者 孙峰 李海明 《移动电源与车辆》 2004年第1期9-11,20,共4页
根据美国工业界武器系统效能咨询委员会的效能含义,结合小型动力电源的性能指标和在特定应用条件下的特殊要求,制定了小型动力电源系统效能分析的一般程序框图,并建立了基于RM&S的小型动力电源效能评估模型。最后以某一系列三种不同型... 根据美国工业界武器系统效能咨询委员会的效能含义,结合小型动力电源的性能指标和在特定应用条件下的特殊要求,制定了小型动力电源系统效能分析的一般程序框图,并建立了基于RM&S的小型动力电源效能评估模型。最后以某一系列三种不同型号的小型动力电源开发过程中的相关数据为例,对该效能评估模型及效能分析程序的可行性进行验证。 展开更多
关键词 小型动力电源 RM&s WsEIAC 效能评估 可靠度函数 便携式动力发电设备
下载PDF
一种高性能全双工S波段收发组件 被引量:3
12
作者 董哲仑 韩国栋 陈建民 《现代雷达》 CSCD 北大核心 2017年第11期80-84,共5页
设计了一款具有全双工模式的S频段收发组件。该组件具有高隔离度、低噪声系数、连续波功率输出的特点。根据系统要求,结合收发组件的射频信道原理,对收发支路进行设计,并根据要求对各器件进行针对性的选择。通过对加工组件样机进行验证... 设计了一款具有全双工模式的S频段收发组件。该组件具有高隔离度、低噪声系数、连续波功率输出的特点。根据系统要求,结合收发组件的射频信道原理,对收发支路进行设计,并根据要求对各器件进行针对性的选择。通过对加工组件样机进行验证,结果表明:发射通道输出功率大于1 W,接收通道增益大于50 d B,噪声系数小于2.1 d B,收发隔离度大于90 d B,模块尺寸小于50 mm×40 mm×12 mm。该S波段收发组件在卫星通信、导航等领域的实际工程中具有较高的应用价值。 展开更多
关键词 s波段 收发组件 低噪声系数 高隔离度
下载PDF
Ascher syndrome: a rare case of blepharochalasis combined with double lip and Hashimoto’s thyroiditis 被引量:4
13
作者 Zhan-Lin Zhao Sheng-Ming Wang +1 位作者 Chun-Yi Shao Yao Fu 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2019年第6期1044-1046,共3页
Dear Editor,I am Dr. Yao Fu, from the Department of Ophthalmology,Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China. I write to present a rare case of Ascher syndrome... Dear Editor,I am Dr. Yao Fu, from the Department of Ophthalmology,Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China. I write to present a rare case of Ascher syndrome.Ascher syndrome was described first in 1920, presenting as a combination of blepharochalasis, double lip, and non-toxic goitre(1)It is considered to be a rare, sporadic. 展开更多
关键词 a RARE CAsE blepharochalasis DOUBLE LIP and Hashimoto’s THYROIDITIs Ascher sYNDROME figure
下载PDF
Correction to:High‑Index‑Faceted Ni3S2 Branch Arrays as Bifunctional Electrocatalysts for Efficient Water Splitting 被引量:1
14
作者 Shengjue Deng Kaili Zhang +8 位作者 Dong Xie Yan Zhang Yongqi Zhang Yadong Wang Jianbo Wu Xiuli Wang Hong Jin Fan Xinhui Xia Jiangping Tu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2021年第1期317-318,共2页
In the original publication,Figure S4 is an ancillary image to compare the specific surface areas of TiO2/Ni3S2 and Ni3S2 samples and it was incorrectly published.To better serve our readers,the correct figure is prov... In the original publication,Figure S4 is an ancillary image to compare the specific surface areas of TiO2/Ni3S2 and Ni3S2 samples and it was incorrectly published.To better serve our readers,the correct figure is provided in this correction.The BET values are correct and unaffected.The corresponding figure caption,data analysis and conclusions are not affected and thus not to be changed.The authors would like to apologize for any inconvenience caused. 展开更多
关键词 Ni3s2 figure CORRECT
下载PDF
一种基于程序理解的N-S图生成算法
15
作者 林道淼 古辉 《计算机工程》 CAS CSCD 2012年第15期286-289,共4页
程序理解是计算机自动实现程序源码分析、获得程序结构相关知识的技术,在程序理解信息提取的基础上,针对程序函数级以下结构的源码分析,运用计算机可视化技术,提出一种N S图表示程序函数的算法,运用该算法可解决图元设计、图元缩放与定... 程序理解是计算机自动实现程序源码分析、获得程序结构相关知识的技术,在程序理解信息提取的基础上,针对程序函数级以下结构的源码分析,运用计算机可视化技术,提出一种N S图表示程序函数的算法,运用该算法可解决图元设计、图元缩放与定位、图元嵌套等问题。算法运行结果表明,该算法能够快速有效地生成N S图,提高程序理解的效率。 展开更多
关键词 程序理解 可视化表示 上下文关系 控制结构 Ns
下载PDF
Exploring the use of transcranial photobiomodulation in Parkinson's disease patients 被引量:2
16
作者 Catherine Hamilton David Hamilton +2 位作者 Frank Nicklason Nabil El Massri John Mitrofanis 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第10期1738-1740,共3页
Parkinson's disease is a neurological disorder with distinct motor signs of resting tremor,akinesia and/or lead-pipe rigidity,together with non-motor symptoms of impaired smell,cognition and autonomic function.These ... Parkinson's disease is a neurological disorder with distinct motor signs of resting tremor,akinesia and/or lead-pipe rigidity,together with non-motor symptoms of impaired smell,cognition and autonomic function.These manifest after a major degeneration of neurones mainly within the brainstem,particularly among the dopaminergic neurones. 展开更多
关键词 Exploring the use of transcranial photobiomodulation in Parkinson’s disease patients figure
下载PDF
基于ADS的2GHz低噪声放大器设计
17
作者 陈印 俞俊学 +3 位作者 俞奇 肖丽娟 赵维 俞沛文 《杭州电子科技大学学报(自然科学版)》 2013年第5期110-113,共4页
该文根据对晶体管结构和低噪声放大器原理的分析,利用ADS软件设计了一个低噪声放大器。通过采用HBT晶体管,设计偏置电路、负反馈电路和输入输出匹配电路,实现在2GHz频率下,低噪声放大器绝对稳定,增益大于13dB,噪声系数低于1.0dB,输出驻... 该文根据对晶体管结构和低噪声放大器原理的分析,利用ADS软件设计了一个低噪声放大器。通过采用HBT晶体管,设计偏置电路、负反馈电路和输入输出匹配电路,实现在2GHz频率下,低噪声放大器绝对稳定,增益大于13dB,噪声系数低于1.0dB,输出驻波比小于1.3,输入驻波比小于2.5。 展开更多
关键词 低噪声放大器 散射参数 噪声系数 增益
下载PDF
Successively bilateral cytomegalovirus retinitis in immunocompromised patient with Good's syndrome 被引量:1
18
作者 Feng Hu Yuan Du Xiao-Yan Peng 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2018年第12期2021-2023,共3页
Dear Editor,I am Dr. Feng Hu, from the Department of Ophthalmology of Beijing Tongren Hospital, Beijing, China. I write to present a case report of cytomegalovirus retinitis (CMVR) in Good’s syndrome (GS).GS is an ex... Dear Editor,I am Dr. Feng Hu, from the Department of Ophthalmology of Beijing Tongren Hospital, Beijing, China. I write to present a case report of cytomegalovirus retinitis (CMVR) in Good’s syndrome (GS).GS is an extremely rare primary immune-deficiency syndrome,which consists of simultaneous occurrence of 展开更多
关键词 In successively bilateral cytomegalovirus retinitis in immunocompromised patient with Good’s syndrome figure
下载PDF
100 Gbit/s/超100 Gbit/s波分复用(WDM)传输系统光链路性能 被引量:2
19
作者 高军诗 《电信科学》 2019年第A01期113-118,共6页
100 Gbit/s/超100 Gbit/s WDM传输系统光链路性能相比过去10 Gbit/s WDM系统有了新特点。首先,论证多光放段、无色散补偿、相干检测的100 Gbit/s/超100 Gbit/s WDM系统光链路性能应采用广义光信噪比来衡量。其次,论证低衰耗、大有效面... 100 Gbit/s/超100 Gbit/s WDM传输系统光链路性能相比过去10 Gbit/s WDM系统有了新特点。首先,论证多光放段、无色散补偿、相干检测的100 Gbit/s/超100 Gbit/s WDM系统光链路性能应采用广义光信噪比来衡量。其次,论证低衰耗、大有效面积新型光纤对多光放段100 Gbit/s/超100 Gbit/s WDM传输系统光链路性能有一定改善。最后指出陆地少光放段WDM系统应采用新型光纤,应考虑GOSNR对其性能规范的参照作用。 展开更多
关键词 超100 Gbit/s 广义OsNR G.654E光纤 光纤有效面积 品质因数
下载PDF
S波段平衡式低噪声放大电路设计
20
作者 高瑞辰 高洪民 +1 位作者 覃焕耀 王大明 《微波学报》 CSCD 北大核心 2020年第S01期193-196,共4页
为满足日渐广泛的射频电路应用需求,设计了一款采用安捷伦公司的ATF54143型E-pHEMT晶体管工作于2.3~2.5GHz的平衡式低噪声放大器。设计分为3dB设计与低噪声放大器电路设计。本文介绍了低噪声放大器相关理论,并通过安捷伦公司的ADS2020... 为满足日渐广泛的射频电路应用需求,设计了一款采用安捷伦公司的ATF54143型E-pHEMT晶体管工作于2.3~2.5GHz的平衡式低噪声放大器。设计分为3dB设计与低噪声放大器电路设计。本文介绍了低噪声放大器相关理论,并通过安捷伦公司的ADS2020仿真软件进行了仿真,结果满足设计要求,得到了良好的增益与较低的噪声系数。为后期电路制版与调试提供了理论支持。 展开更多
关键词 低噪声放大器 平衡式放大 噪声系数 s波段
下载PDF
上一页 1 2 9 下一页 到第
使用帮助 返回顶部