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Design of mm-wave amplifiers based on over & under neutralization techniques

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Science China(Information Sciences) 2018年第6期61卷 256-258页

作者： Di LI Lei ZHANG Li ZHANG Yan WANG zhiping yu Institute of Microelectronics Tsinghua University

Dear editor,Recently high-speed wireless communications in60 GHz unlicensed band become increasingly attractive for both academia and industry[1–5].Millimeter wave amplifiers are believed difficult in complimentary m... 详细信息

关键词： LNA Design of mm-wave amplifiers based on over under neutralization techniques

Optimization of phenol degradation by Candida tropicalis Z-04 using Plackett-Burman design and response surface methodology

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Journal of Environmental Sciences 2011年第1期23卷 22-30页

作者： Jiangya Zhou Xiaojuan yu Cong Ding zhiping Wang Qianqian Zhou Hao Pao Weimin Ca School of Environmental Science and Engineering Shanghai Jiaotong University Dongchuan Road 800 Shanghai 200240 China.

Statistical experimental designs were used to optimize the process of phenol degradation by Candida tropicalis Z-04, isolated from phenol-degrading aerobic granules. The most important factors influencing phenol degradation （p 〈 0.05）, as identified by a two-level Plackett-Burman design with 11 variables, were yeast extract, phenol, inoculum size, and temperature. Steepest ascent method was undertaken to determine the optimal regions of these four significant factors. Central composite design （CCD） and response surface analysis were adopted to further investigate the mutual interactions between these variables and to identify their optimal values that would generate maximum phenol degradation. The analysis results indicated that interactions between yeast extract and temperature, phenol and temperature, inocuhim size and temperature affected the response variable （phenol degradation） significantly. The predicted results showed that the maximum removal efficiency of phenol （99.10%） could be obtained under the optimum conditions of yeast extract 0.41 g/L, phenol 1.03 g/L, inoculum size 1.43% （V/V） and temperature 30.04℃. These predicted values were further verified by validation experiments. The excellent correlation between predicted and experimental values confirmed the validity and practicability of this statistical optimum strategy. This study indicated the excellent ability of C. tropicalis Z-04 in degrading high-strength phenol. Optimal conditions obtained in this experiment laid a solid foundation for further use of this microorganism in the treatment of highstrength phenol effluents.

关键词： phenol degradation Candida tropicalis Z-04 optimization Plackett-Burman design response surface methodology

A Fully Integrated 60GHz Four Channel CMOS Receiver with 7GHz Ultra-Wide Bandwidth for IEEE 802.11ad Standard

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China Communications 2014年第6期11卷 42-50页

作者： ZHANG Lei ZHOU Chunyuan WANG Hongrui WANG Yan QIAN He yu zhiping Institute of Microelectronics Tsinghua University

In this paper, a fully integrated CMOS receiver frontend for high-speed short range wireless applications centering at 60GHz millimeter wave （mmW） band is designed and implemented in 90nm CMOS technology. The 60GHz receiver is designed based on the super-heterodyne architecture consisting of a low noise amplifier （LNA） with inter-stage peaking technique, a single- balanced RF mixer, an IF amplifier, and a double-balanced I/Q down-conversion IF mixer. The proposed 60GHz receiver frontend derives from the sliding-IF structure and is designed with 7GHz ultra-wide bandwidth around 60GHz, supporting four 2.16GHz receiving channels from IEEE 802.1lad standard for next generation high speed Wi- Fi applications. Measured results show that the entire receiver achieves a peak gain of 12dB and an input 1-dB compression point of -***, with a noise figure of lower than 7dB, while consumes a total DC current of only 60mA from a 1.2V voltage supply.

关键词： CMOS 60GHz receiver four channel LNA

Accurate and fast table look-up models for leakage current analysis in 65nm CMOS technology

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Journal of Semiconductors 2009年第2期30卷 42-47页

作者：薛冀颖李涛余志平 Institute of Microelectronics Tsinghua University

Novel physical models for leakage current analysis in 65 nm technology are proposed. Taking into consideration the process variations and emerging effects in nano-scaled technology, the presented models are capable of accurately estimating the subthreshold leakage current and junction tunneling leakage current in 65 nm technology. Based on the physical models, new table look-up models are developed and first applied to leakage current analysis in pursuit of higher simulation speed. Simulation results show that the novel physical models are in excellent agreement with the data measured from the foundry in the 65 nm process, and the proposed table look-up models can provide great computational efficiency by using suitable interpolation techniques. Compared with the traditional physical-based models, the table look-up models can achieve 2.5X speedup on average on a variety of industry circuits.

关键词： leakage current 65 nm technology table look-up model interpolation

Vibration velocity and frequency of underwater short-hole blasting

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Journal of University of Science and Technology Beijing 2002年第4期9卷 245-248页

作者： Jianzhou Wang, Yalun yu, and zhiping LiCivil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China Civil and Environmental Engineering School University of Science and Technology Beijing Beijing 100083 China

Based on the measuring data of underwater blasting vibration and theregression analysis results of these data, two formulae usually used of blasting vibration velocitywere compared. Factors that can affect blasting vibration and frequency were summarized andanalyzed. It is thought that the effect of the number of freedom face and burden direction onblasting vibration should be considered during blasting design. Based on the relevant researchresults and the regression results of these data, a formula to calculate under water blastingfrequency was put forward.

关键词： underwater blasting blasting vibration velocity frequency

Mineral Medicine: Chinese Medical Stone

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Journal of Pharmacy and Pharmacology 2021年第4期9卷 174-177页

作者： Haoxuan yu Yan Deng zhiping yu Institute of Electrical and Electronics Engineers Beijing SectionBeijing 100000China Central South University Changsha 410083Hunan ProvinceChina Nanzheng District People’s Hospital Hanzhong 723100Shaanxi ProvinceChina

A simple experiment of rat gastric ulcer was carried out to study the medical effect of Chinese Medical Stone which is a kind of Mineral Medicine of mines in China on gastric ulcer in *** purpose of this study was to investigate the effect of the Chinese Medical Stone on the prevention and treatment of experimental gastrointestinal disease,especially gastric ulcer.

关键词： Mineral Medicine Minerals Digestive diseases Chinese Medical Stone Experiment Rats

Spatial learning and memory deficits in young adult mice exposed to a brief intense noise at postnatal age

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Journal of Otology 2015年第1期10卷 21-28页

作者： Shan Tao Lijie Liu Lijuan Shi Xiaowei Li Pei Shen Qingying Xun Xiaojing Guo zhiping yu Jian Wang Department of Physiology Medical College of Southeast University Children's Medical Center the Second Affiliated Hospital of Nanjing Medical University School of Human Communication Disorders Dalhousie University

Noise pollution is a major hazardous factor to human health and is likely harmful for vulnerable groups such as pre-term infants under lifesupport system in an intensive care unit. Previous studies have suggested that noise exposure impairs children’s learning ability and cognitive performance and cognitive functions in animal models in which the effect is mainly attributed to the oxidant stress of noise on the cognitive brain. The potential role of noise induced hearing loss(NIHL), rather than the oxidant stress, has also been indicated by a depression of neurogenesis in the hippocampus long after a brief noise exposure, which produces only a tentative oxidant stress. It is not clear if noise exposure and NIHL during early development exerts a long term impact on cognitive function and neurogenesis towards adulthood. In the present study, a brief noise exposure at high sound level was performed in neonatal C57BL/6J mice(15 days after birth) to produce a significant amount of permanent hearing loss as proved 2 months after the noise. At this age, the noise-exposed animals showed deteriorated spatial learning and memory abilities and a reduction of hippocampal neurogenesis as compared with the control. The averaged hearing threshold was found to be strongly correlated with the scores for spatial learning and memory. We consider the effects observed are largely due to the loss of hearing sensitivity, rather than the oxidant stress, due to the long interval between noise exposure and the observations.

关键词： Noise induced hearing loss Neonatal mice Learning

非对称栅压在负栅极-源漏极交叠结构超薄沟道双栅器件中的应用

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清华大学学报（自然科学版） 2007年第4期47卷 584-587页

作者：邵雪余志平清华大学微电子学研究所北京100084

为了研究纳米尺度器件中量子力学效应对传输特性及动态特性的影响,在器件模拟软件TAURUS中实现了量子修正的漂移扩散模型(QDD),并对具有负栅极-源漏极交叠结构的超薄沟道双栅器件进行了数值模拟。结果显示:非对称栅压的控制方法使得器... 详细信息

为了研究纳米尺度器件中量子力学效应对传输特性及动态特性的影响,在器件模拟软件TAURUS中实现了量子修正的漂移扩散模型(QDD),并对具有负栅极-源漏极交叠结构的超薄沟道双栅器件进行了数值模拟。结果显示:非对称栅压的控制方法使得器件具有动态可调的阈值电压,能够动态地适应高性能与低功耗的要求。通过优化栅极与源漏区的交叠长度可以降低栅极电容,从而提高器件的动态特性,提高电路的工作速度。

关键词：双栅器件超薄沟道量子漂移扩散模型栅极-源漏极交叠

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新中国六十年与重塑民族魂

江海学刊 2009年第4期 5-14页

作者：余治平上海社会科学院哲学研究所

新中国成立后第一个30年的时代主题是建立一个消灭剥削和压迫、公平公正的社会主义制度。共产党政权至少在土地、政治、经济、司法、文化的制度层面上造就了一个相对公平公正的新社会。第二个30年的历史任务则是富国富民,现代化成为整... 详细信息

新中国成立后第一个30年的时代主题是建立一个消灭剥削和压迫、公平公正的社会主义制度。共产党政权至少在土地、政治、经济、司法、文化的制度层面上造就了一个相对公平公正的新社会。第二个30年的历史任务则是富国富民,现代化成为整个时代的主旋律,市场被全面引进了我们的公私生活。但随着改革推向纵深,潜藏在经济发展背后的负面问题逐渐暴露了出来。而这类问题内在地决定着下一个30年中国的发展路向。破解中国如何向世界贡献核心价值的难题,重建文化文明,整合社会主义、现代化、儒家文化三大统绪将成为未来中国人不容推卸的伟大使命。中华民族的现代形成与再度复兴需要自己的民族认同和核心价值,即自己的动员力量。尽管步履维艰,但60年的探索与积累恰又为我们提供了充足的信心。

关键词：社会主义现代化儒家文化公平公正富国富民文化文明