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期刊论文 6

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2021 2

2019 1

2017 1

2009 1

2006 1

关键词

CP）；符号间干扰（inter symbol interference， ISI）；载波间干扰（inter carrier interference 1

ICI）；最大似然估计（maximum likelihood estimation 1

MLE） 1

OFDM）；快速傅立叶变换（Fast Fourier transform， FFT）；循环前缀（cyclic prefix 1

正交频分复用（orthogonal frequency division multiplexing 1

科里奥利质量流量计；数字信号处理方法；两相流工况；正交解调；滑动离散傅里叶变换；希尔伯特变换 1

频率合成器；电荷泵；压控振荡器；电流失配；相位噪声 1

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Computer-Aided Design System for CP Single-Screw Compressor

SHEN Jing-feng, YAO Fu-sheng

《机械工程前沿（英文）》 2006年第1卷第1期页码 21-25 doi: 10.1007/s11465-005-0018-3

摘要：

To design various optimum parameters and simulate the working process of CP single-screw compressor, the Computer-Aided Design (CAD) system for the CP single-screw compressor has been established. A new method based on computer graphics technology, database technology, object-oriented programming technology, and visual simulation technology has been adopted in this CAD system. The system has integrated solid modeling function with parameterization design function and animator simulation function based on analyzing the working principle of the CP single-screw compressor. The experimental results show that the CAD system for the CP single-screw compressor is practical and feasible.

关键词： CP single-screw database technology simulation technology programming technology animator simulation

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一种通过循环前缀再利用改善OFDM系统带宽的新型节能ICI消除技术 Article

Sandeep SAROWA, Harmanjeet SINGH, Sunil AGRAWAL, B. S. SOHI

《信息与电子工程前沿（英文）》 2017年第18卷第11期页码 1892-1899 doi: 10.1631/FITEE.1601333

摘要：本文基于接收端循环前缀（cyclic prefix, CP）再利用，提出了一种节能且具有有效带宽的新技术来消除ICI。

关键词： orthogonal frequency division multiplexing OFDM）；快速傅立叶变换（Fast Fourier transform， FFT）；循环前缀（cyclic prefix CP

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Solvability and thermal response of cellulose with different crystal configurations

Qian CHEN, Kai ZHENG, Qingtao FAN, Kun WANG, Haiyan YANG, Jianxin JIANG, Shijie LIU

《工程管理前沿（英文）》 2019年第6卷第1期页码 62-69 doi: 10.1007/s42524-019-0001-z

摘要：

Cellulose is a biodegradable and renewable natural material that it is naturally resistant to breaking and modification. Moreover, the crystalline structure of cellulose is a major factor restricting its industrial utilization. In this study, cellulose polymorphs were prepared from natural cellulose, and their solvability and thermal response were investigated. Using liquid- and solid-state NMR signals, the distinct types and dissolving states of cellulose polymorphs were identified. The thermal behavior of the polymorphic forms of cellulose-d was also evaluated, and cellulose II exhibited the poorest thermal stability and a unique exothermic reaction.

关键词： cellulose crystal structure thermal response XRD CP/MAS ¹³C NMR

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Development of electrorheological chip and conducting polymer-based sensor

Xianzhou ZHANG, Weihua LI, Weijia WEN, Yanzhe WU, Gordon WALLACE,

《机械工程前沿（英文）》 2009年第4卷第4期页码 393-396 doi: 10.1007/s11465-009-0043-8

摘要： This paper presents the development of an integrated sensor using two types of smart materials: electrorheological (ER) fluids and conducting polymers (CPs). The developed ER chip worked as an actuator, and it was driven by different voltages and control frequencies. When the four electrodes are controlled synchronously, the diaphragm acts as a vibrator whose frequency can be adjusted in accordance with the frequency of the electrical signals. The response signals of the CP sensor were recorded, and its properties were analyzed. Experimental results show that the amplitude decreases monotonically when the frequency increases, owing to the time delay in the pressure buildup in the ER chip. However, the displacement fluctuation of the diaphragm below 20Hz can be detected clearly even if the value is very low. When the vibration frequency is larger than 20Hz, the CP sensor can hardly detect the displacement fluctuation. Thus, the upper limit frequency that the CP sensor can detect is about 20Hz. The practical applications of this microdevice are also discussed.

关键词： electrorheological (ER) fluids conducting polymer (CP) polydimethylsioxane (PDMS) driving frequency amplitude bubble counter

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基于优化的压控振荡器和低电流失配电荷泵的0.20–2.43 GHz分数分频频率合成器

邹维,任达明,邹雪城

《信息与电子工程前沿（英文）》 2021年第22卷第2期页码 141-286 doi: 10.1631/FITEE.1900653

摘要：提出一种适用于多标准无线通信系统的0.20–2.43 GHz分数分频频率合成器方案，该方案采用低相位噪声压控振荡器和低电流失配电荷泵。由于压控振荡器的性能决定了锁相环型频率合成器的带外相位噪声，利用自动幅度控制技术和高品质因数的8字型电感对压控振荡器进行优化。为改善电荷泵电流匹配性能以及减小锁相环相位误差，提出一种具有失配抑制结构的电荷泵。通过理论分析，研究了电流失配对锁相环输出性能的影响。采用台积电0.18-µm CMOS工艺，模型输出频率从0.20 GHz变化到2.43 GHz。这一锁相环型频率合成器在2.43 GHz载波时实现的带内相位噪声为−96.8 dBc/Hz，带外相位噪声为−122.8 dBc/Hz。在最坏情况下，均方根抖动为1.2 ps，测量的参考杂散小于−65.3 dBc。消耗电流15.2 mA，芯片面积为850 µm×920 µm。

关键词：频率合成器；电荷泵；压控振荡器；电流失配；相位噪声

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科里奥利质量流量计气液两相流信号处理的改进

李春辉1,孙立军1,刘佳荣1,张扬1,李海洋2,王化祥1

《信息与电子工程前沿（英文）》 2021年第22卷第2期页码 141-286 doi: 10.1631/FITEE.1900558

摘要：科里奥利质量流量计作为一种日益流行的流量测量仪表，在单相流条件下表现出较高测量精度，并在工业上得到广泛应用。但在复杂流动条件下，例如两相流工况，由于各种因素（包括不合适的信号处理方法），测量精度会大大降低。本文分析了3种数字信号处理方法——正交解调（QD）、希尔伯特和滑动离散傅立叶变换法，分别用于处理传感器信号并在两相流工况下测试算法性能。在此基础上，分别改进了两相流条件下的信号处理方法。在仿真中使用随机游走模型分别建立单相流和两相流工况下的传感器信号，评估这3种方法的相位差跟踪性能。基于数字信号处理器，在其评估板上完成转换器程序设计。将转换器在单相流和两相流工况下测试，根据测量精度和算法复杂度评估改进的信号处理方法性能，结果表明QD算法在单相流工况下性能最佳。在两相流条件下，QD算法在160、250和420 kg/h流量点的测量指示误差和重复性能优于改进的希尔伯特算法，而希尔伯特算法在600 kg/h流量点的性能优于QD算法。

关键词：科里奥利质量流量计；数字信号处理方法；两相流工况；正交解调；滑动离散傅里叶变换；希尔伯特变换

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标题作者时间类型操作

Computer-Aided Design System for CP Single-Screw Compressor

SHEN Jing-feng, YAO Fu-sheng

期刊论文

一种通过循环前缀再利用改善OFDM系统带宽的新型节能ICI消除技术

Sandeep SAROWA, Harmanjeet SINGH, Sunil AGRAWAL, B. S. SOHI

期刊论文

Solvability and thermal response of cellulose with different crystal configurations

Qian CHEN, Kai ZHENG, Qingtao FAN, Kun WANG, Haiyan YANG, Jianxin JIANG, Shijie LIU

期刊论文