检索结果-内蒙古大学图书馆

您好，读者！请登录

内蒙古大学图书馆

首页
概况
党建
资源
服务
科研支持
- 论文收录引用证明
- 科技查新
知识产权
档案馆
帮助

咨询与建议

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

您的常用邮箱：*

您的手机号码：*

问题描述：

当前已输入0个字，您还可以输入200个字

全部搜索
期刊论文
图书
学位论文
标准
纸本馆藏
外文资源发现
数据库导航
超星发现

高级检索

时间限定

出版年份：

文献类型

图书期刊文献学位论文多媒体

馆藏选择

电子馆藏纸本馆藏

核心期刊

全部期刊 SCI 收录期刊 SSCI 收录期刊 EI 收录期刊 CSCD 收录期刊 CSSCI 收录期刊

语言

中文英文

文献类型

期刊文献图书学位论文标准纸本馆藏

帮助

文字说明：

T=题名（书名、题名），A=作者（责任者），K=主题词，P=出版物名称，PU=出版社名称，O=机构（作者单位、学位授予单位、专利申请人），L=中图分类号，C=学科分类号，U=全部字段，Y=年（出版发行年、学位年度、标准发布年）

检索规则说明：

AND代表“并且”；OR代表“或者”；NOT代表“不包含”；(注意必须大写,运算符两边需空一格)

检索范例：

范例一：(K=图书馆学 OR K=情报学) AND A=范并思 AND Y=1982-2016
范例二：P=计算机应用与软件 AND (U=C++ OR U=Basic) NOT K=Visual AND Y=2011-2016

分类表

所选分类

>> <<

限定检索结果

文献类型

217 篇 会议
21 篇 期刊文献

馆藏范围

238 篇 电子文献
0 种 纸本馆藏

日期分布

学科分类号

150 篇 工学
- 70 篇 信息与通信工程
- 56 篇 电子科学与技术（可...
- 38 篇 计算机科学与技术...
- 29 篇 软件工程
- 22 篇 电气工程
- 21 篇 控制科学与工程
- 21 篇 航空宇航科学与技...
- 17 篇 机械工程
- 16 篇 材料科学与工程（可...
- 15 篇 化学工程与技术
- 12 篇 仪器科学与技术
- 9 篇 土木工程
- 7 篇 力学（可授工学、理...
- 7 篇 光学工程
- 7 篇 建筑学
- 7 篇 生物工程
- 6 篇 冶金工程
- 6 篇 动力工程及工程热...
- 5 篇 交通运输工程
- 3 篇 测绘科学与技术
78 篇 理学
- 43 篇 数学
- 34 篇 物理学
- 14 篇 化学
- 14 篇 统计学（可授理学、...
- 7 篇 生物学
- 3 篇 大气科学
- 3 篇 系统科学
13 篇 管理学
- 10 篇 管理科学与工程(可...
- 4 篇 工商管理
4 篇 农学
4 篇 军事学
3 篇 经济学
- 3 篇 应用经济学

主题

14 篇 frequency select...
10 篇 electromagnetic ...
8 篇 optimization
7 篇 simulation
7 篇 reflection
7 篇 convolution
6 篇 computational el...
6 篇 radar cross-sect...
6 篇 radar cross sect...
5 篇 stability analys...
5 篇 electromagnetics
5 篇 horn antennas
5 篇 computational mo...
5 篇 analytical model...
5 篇 training
4 篇 jamming
4 篇 space vehicles
4 篇 frequency modula...
4 篇 plasmas
4 篇 modulation

机构

78 篇 national key lab...
28 篇 national key lab...
18 篇 national key lab...
14 篇 national key lab...
12 篇 national key lab...
11 篇 beijing institut...
11 篇 college of infor...
10 篇 national key lab...
8 篇 beijing institut...
8 篇 national key lab...
7 篇 beijing institut...
6 篇 beijing universi...
5 篇 school of inform...
5 篇 beijing institut...
5 篇 school of electr...
4 篇 school of automa...
4 篇 national key lab...
4 篇 shandong institu...
4 篇 northwestern pol...
4 篇 school of inform...

作者

51 篇 jiaqi liu
50 篇 liu jiaqi
26 篇 lu gao
23 篇 gao lu
21 篇 liu xin
20 篇 xin liu
19 篇 ai xia
17 篇 zhang shengjun
16 篇 jiang zhiye
15 篇 meng gang
15 篇 xia ai
14 篇 gang meng
14 篇 shengjun zhang
13 篇 zhiye jiang
12 篇 runle du
10 篇 wu runhui
10 篇 feng xue
9 篇 zheng pei
9 篇 cui yichun
9 篇 gao jingpeng

语言

235 篇 英文
3 篇 中文

检索条件"机构=Science and Technology on Test Physics & Numerical Mathematic Laboratory"

共 238 条记录，以下是191-200 订阅

全选清除本页清除全部题录导出标记到"检索档案"

详细简洁

排序：

A recursive predictive risk estimate for proximal algorithms

A recursive predictive risk estimate for proximal algorithms

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Feng Xue Runle Du Jiaqi Liu National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing China

ISBN: (纸本)9781479999897

For accurate signal reconstruction, proximal gradient methods generally require proper selection of regularization parameter. In this paper, we develop two data-driven optimization schemes, based on minimization of unbiased predictive risk estimate (UPRE). First, we propose a recursive UPRE to estimate the prediction error during the proximal iterations, which can be used to optimize the regularization parameter. Second, for fast optimization, we parametrize each proximal iterate as a linear combination of few elementary functions (LET), and solve the linear weights by minimizing recursive UPRE. We further exemplify the proposed approaches with the basic iterative shrinkage/thresholding (IST) algorithms for ℓ 1 -minimization. numerical experiments show that iterating this process leads to higher reconstruction accuracy with remarkably faster computational speed than standard IST.

关键词： Jacobian matrices Prediction algorithms Convergence Gradient methods Signal processing algorithms Standards

来源：评论

学校读者我要写书评

暂无评论

Dispersive FDTD scheme with conformal technology for analyzing electromagnetic scattering of inhomogeneous plasma array

Dispersive FDTD scheme with conformal technology for analyzi...

引用

IET International Radar Conference 2015

作者： Ai, Xia Liu, Shendong Zhang, Shengjun Wang, Mingliang Liu, Jiaqi Meng, Gang Zhou, Hongchao National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematical China

ISBN: (纸本)9781849199940

In this paper, a dispersive conformal FDTD method have been proposed to accurate model the interface between two adjacent dispersive mediums. The method is based on the technology of area average between two adjacent dispersive interfaces, which is different from existing dispersive conformal FDTD schemes which involve with the interface between free space and dispersive medium. numerical results show the proposed method would enhance the accurate level compared to the staircasing FDTD scheme involved in the inhomogeneous plasma.

关键词： numerical methods

来源：评论

学校读者我要写书评

暂无评论

Higher order shift operater FDTD scheme for scattering of cloaking structure

Higher order shift operater FDTD scheme for scattering of cl...

引用

IET International Radar Conference 2015

作者： Ai, Xia Zhang, Shengjun Wang, Mingliang Wang, Weidong Liu, Jiaqi Liu, Chengguo Liu, Xuemei National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematical China

ISBN: (纸本)9781849199940

In this paper, a higher-order shift operater (SO) FDTD scheme with second-order accuracy in time and fourth-order in space has been proposed to accurately model scattering of perfect electronic conductor coated with cloaking structures. Several different electromagnetic parameters of the cloaks are taken into account using SO-FDTD method. numerical results indicate that the proposed method is more accuracy than the traditioinal method maintaining the same grid size. Scattering of different kinds of simplified cylindrical cloaks including thickness and loss are presented and could be served as further study on this subject.

关键词： Finite difference time domain method

来源：评论

学校读者我要写书评

暂无评论

The research on the effects of an active FSS with circle element on the characteristics of Radar Absorbing Materials

The research on the effects of an active FSS with circle ele...

引用

IET International Radar Conference 2015

作者： Wang, Ming-Liang Zhang, Sheng-Jun Liu, Jia-Qi Wang, Wei-Dong Ai, Xia Liu, Shengdong Liang, Wei National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematical Beijing China

ISBN: (纸本)9781849199940

An active frequency selective surface (FSS) is designed, and is combined with Radar Absorbing Materials to form a composite absorbing structure. Based on the equivalent theory that the PIN diode can be regarded as resistance, the voltage-loading resistance of active FSS element is researched for RAM containing FSS, and the electromagnetic wave reflectivity performance is analyzed. The influence of active FSS design parameters on the reflectivity of RAM is researched, and the FSS design parameters include the voltage-loading manner, the resistance parameter, and the position in the RAM. The research result shows that the resonance frequency of RAM containing FSS can be dynamically adjusted from 3GHz to 4GHz by changing voltage-loading resistance of active FSS, and the reflectivity can be reduced from -13dB to -35dB.

关键词： Reflection

来源：评论

学校读者我要写书评

暂无评论

ISAR target micro-Doppler feature extraction and recognition method based on PCA and ICA

ISAR target micro-Doppler feature extraction and recognition...

引用

IET International Radar Conference 2015

作者： Bai, Jinliang Jiang, Zhiye Liu, Jiaqi Gao, Lu Liu, Hongyan Xu, Feng Qin, Peng Li, Hu Chen, Shuyuan Liu, Shengdong National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing China

ISBN: (纸本)9781849199940

Micro-Doppler features can be regarded as a unique signature of ISAR targets and provide critical information for target recognition. This paper proposes an ISAR micro-Doppler feature extraction and recognition method based on combination algorithm of principle component analysis (PCA) and independent component analysis (ICA). In order to decrease computation burden, PCA algorithm is first applied to reduce dimension and second order correlation, and then ICA decomposes micro-Doppler represented in time frequency domain into a set of independent basis components, which consist the micro-Doppler feature subspace. Target recognition is transformed to calculate the projection coefficient in the subspace. The experimental results verify the correctness and effectiveness of the proposed method.

关键词： Independent component analysis

来源：评论

学校读者我要写书评

暂无评论

Communication performance optimization of spaceborne/airborne Radar networks

Communication performance optimization of spaceborne/airborn...

引用

IET International Radar Conference 2015

作者： Li, Hu Gao, Lu Liu, Jiaqi Liu, Hongyan Jiang, Zhiye Bai, Jinliang Xu, Feng Chen, Shuyuan Liu, Shengdong Zhu, Guangsheng Liu, Xuemei National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing100076 China

ISBN: (纸本)9781849199940

In this paper, we investigate communication performance optimization problem of spaceborne/airborne Radar networks. A model of spaceborne/airborne Radar networks with propagation delay and power constraints is given first. A Quadric Lyapunov function based Algorithm (QLA) is then proposed aiming at greedily minimizing an expression containing Lyapunov drift. We prove two main conclusions, one is that the communication network of spaceborne/airborne Radars under QLA is stable, the other is that power constraints are met. Upper bounds of queue backlogs and a lower bound of utility function are established through theoretical analysis, and how propagation delay jeopardizes utility performance is also demonstrated. Simulation of QLA is carried out in a scenario consists of 6 nodes, and results are in accordance with theoretical conclusions.

关键词： Lyapunov methods

来源：评论

学校读者我要写书评

暂无评论

RCS analysis of disk target covered with non-uniform plasma

RCS analysis of disk target covered with non-uniform plasma

引用

IET International Radar Conference 2015

作者： Wu, Runhui Liu, Jiaqi Liu, Xin Meng, Gang Ren, Aimin Qi, Zhaohui National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematical Beijing100076 China

ISBN: (纸本)9781849199940

This paper presents a model of RCS characteristic of non-uniform plasma sheltering disk target, by considering the absorption and refraction of electromagnetic wave, and combining graphic electromagnetic and ray tracking methods. The results show that: (1) RCS is reduced more than 10dB at wide-band frequency of electromagnetic wave, when the incident direction of electromagnetic wave is near the vertical surface. (2)For optimization of RCS reduction scheme, it is effective to optimize the relation between the plasma parameters (including electronic density, collision frequency, over-dense target scale) and incident wavelength. When the area of over-dense surface was larger than the target scale, the larger the collision frequency could lead to greater RCS reduction. When the area of over-dense scale was smaller than target, the RCS reduction has to be achieved by increasing electronic density and collision frequency.

关键词： Radar cross section

来源：评论

学校读者我要写书评

暂无评论

Study of RF structure for W band sheet beam EIK

Study of RF structure for W band sheet beam EIK

引用

IET International Radar Conference 2015

作者： Chen, Shuyuan Jiang, Zhiye Liu, Jiaqi Gao, Lu Bai, Jingliang Liu, Hongyan Meng, Gang Xu, Feng Li, Hu Liu, Chengguo Zhu, Guangsheng National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing100076 China

ISBN: (纸本)9781849199940

Microwave tubes are vacuum electron devices used for the generation and amplification of radio frequencies in the microwave frequency range. Klystron is a kind of microwave tubes which is used in radar. A sheet-beam Extended Interaction Klystron (SBEIK) is an attractive MMW amplifier because of its high gain per unit length and compact configuration. The RF structure is an important part of the whole tube, which is used for beam wave interaction. In this paper, two kinds of barbell cavity has been studied. The difference between the separating multi-gap barbell resonant cavity and the strong coupling multi-gap barbell cavity has been discussed. RF parameters have been calculated by 3D simulations.

关键词： Microwaves

来源：评论

学校读者我要写书评

暂无评论

An iterative sure-let approach to sparse reconstruction

An iterative sure-let approach to sparse reconstruction

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Feng Xue Thierry Blu Runle Du Jiaqi Liu National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing China Dept. of Electronic Engineering The Chinese University of Hong Kong Shatin N.T.Hong Kong

Sparsity-promoting regularization is often formulated as ℓv-penalized minimization (0

ISBN: (纸本)9781479999897

Sparsity-promoting regularization is often formulated as ℓv-penalized minimization (0

关键词： Optimization Jacobian matrices Convergence Iterative methods Minimization Standards Signal to noise ratio

来源：评论

学校读者我要写书评

暂无评论

Design and Particle-in-Cell Simulation of Sub-THz Sheet Beam EIK

Design and Particle-in-Cell Simulation of Sub-THz Sheet Beam...

引用

International Conference on Infrared, Millimeter, and Terahertz Waves

作者： Shuyuan Chen Jiaqi Liu Yongtao Shui Lu Gao Zhiye Jiang Jingliang Bai Hongyan Liu Xin Liu Xuefeng Zhang Feng Xu Peng Qin Hu Li National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing 100076 P. R. China

ISBN: (纸本)9781467384865

In this paper, a novel and small sub-terahertz (THz) sheet beam extended interaction klystron (EIK) has been designed. With the help of a three-dimensional (3D) particle-in-cell (PIC) simulation, design and optimizing geometry of THz sheet beam EIK is performed. The interaction system consists of two dumbbell five-gap cavities, one is used for input cavity, the other is output cavity. The operating center frequency of sub-THz sheet beam EIK is 94.5GHz. The gain of whole tube is higher than 24.8dB, which is only consisted of two resonant cavities. If there are more cavities, the tube will get higher gain. This is a big progress and is very useful for the design of lightweight, mini-type and low input power but with high output power THz sheet beam EIK.

关键词： Cavity resonators Power generation Particle beams Power amplifiers Gain Klystrons

来源：评论

学校读者我要写书评

暂无评论

没有更多数据了...

全选清除本页清除全部题录导出标记到“检索档案”

共24页 << < 15 16 17 18 19 20 21 22 23 24 > >>

检索报告对象比较合并检索0

隐藏清空

合并搜索

回到顶部

执行限定条件

内容：

评分：

请选择保存的检索档案：

请选择收藏分类：

订阅名称：

通借通还

温馨提示：

图书名称：

借书校区：

取书校区：

手机号码：

邮箱地址：

一卡通帐号：

电话和邮箱必须正确填写，我们会与您联系确认。

联系人：

所在院系：

联系邮箱：

联系电话：

内蒙古自治区呼和浩特市赛罕区大学西街235号邮编: 010021

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

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：