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Open Journal of Statistics 2020年第6期10卷 1020-1038页

作者： Loredana Cristaldi Alessandro Ferrero Simona Salicone Giacomo Leone Dipartimento di Elettronica Informazione e Bioingegneria (DEIB) Politecnico di Milano Milano Italy sorint.tek Grassobbio Italy

In this paper, a data-driven prognostic model capable to deal with different sources of uncertainty is proposed. The main novelty factor is the application of a mathematical framework, namely a Random Fuzzy Variable (RFV) approach, for the representation and propagation of the different uncertainty sources affecting Prognostic Health Management (PHM) applications: measurement, future and model uncertainty. In this way, it is possible to deal not only with measurement noise and model parameters uncertainty due to the stochastic nature of the degradation process, but also with systematic effects, such as systematic errors in the measurement process, incomplete knowledge of the degradation process, subjective belief about model parameters. Furthermore, the low analytical complexity of the employed prognostic model allows to easily propagate the measurement and parameters uncertainty into the RUL forecast, with no need of extensive Monte Carlo loops, so that low requirements in terms of computation power are needed. The model has been applied to two real application cases, showing high accuracy output, resulting in a potentially effective tool for predictive maintenance in different industrial sectors.

关键词： Data-Driven Epistemic Uncertainty Measurement Uncertainty Future Uncertainty Prognostics and Health Management Random Fuzzy Variable Remaining Useful Life Similarity

Amine reclaiming technologies in post-combustion carbon dioxide capture

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Journal of Environmental Sciences 2015年第1期27卷 276-289页

作者： Tielin Wang Jon Hovland Klaus J.Jens Telemark University College Tel-tek Porsgrunn 3918 Norway

Amine scrubbing is the most developed technology for carbon dioxide（CO2） *** of amine solvents due to the presence of high levels of oxygen and other impurities in flue gas causes increasing costs and deterioration in long term performance,and therefore purification of the solvents is needed to overcome these problems. This review presents the reclaiming of amine solvents used for post combustion CO2capture（PCC）. Thermal reclaiming, ion exchange, and electrodialysis, although principally developed for sour gas sweetening, have also been tested for CO2 capture from flue *** three technologies all have their strengths and weaknesses, and further development is needed to reduce energy usage and costs. An expected future trend for amine reclamation is to focus on process integration of the current reclaiming technologies into the PCC process in order to drive down costs.

关键词： Carbon dioxide capture Amine reclaiming Distillation Ion exchange Electrodialysis

Prediction of flow patterns during silo discharges using a finite element approach and its preliminary experimental verification

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Particuology 2015年第1期13卷 42-49页

作者： S.Ding H.Li J.Y.Ooi J.M.Rotter Faculty of Science and Engineering University of AgderGrimstadand Tel-TekPorsgrunnNorway School of Material & Mineral Resources Xi'an University of Architecture & Technology Institute for Infrastructure and Environment School of EngineeringUniversity of Edinburgh

Obtaining a reliable discharge of particulate solids from a storage silo is a prerequisite to securing oper- ational adequacy in solids handling processes. If a silo is poorly designed, an unreliable interrupted discharge often occurs. In this study, an in-house finite element （FE） program was modified to predict the particulate solids flow patterns during discharges from silos, and the effect of a double-cone insert on such flow patterns. In FE modeling, a Eulerian approach was adopted with an assumption of steady-state flow-a state that greatly facilitated investigations on the effects of double-cone inserts on the flow of particulate solids. Predictions were carried out on whether the discharge was in mass flow or funnel flow, associated with the inclination angle of the silo＇s hopper. Predicted results were in agreement with the Jenike Chart, and proved that an upper lateral pressure ratio value gave a better critical hopper half angle to achieve mass flow （EN 1991-4, 2006）. The shape and size of the stagnant zone were further discussed to address the flow channel boundary between the flowing and static solids if the discharge was in a funnel pattern. Results also showed the effects of a double-cone insert on the flow patterns which con- verted silos from funnel flow to mass flow up to a certain hopper inclination angle and would improve the flow pattern even for shallower angles. Experiments were carried out to verify some of the predicted results. Some qualitative comparisons were made between the predicted results and experimental mea- surements, which indicated that further efforts are needed in predicting the shape of the stagnant zone （flow channel boundary） during funnel flow discharges.

关键词： Discharge pattern Flow boundary Double-cone insert FE analysis Preliminary verification

15158A SP6T RF switch based on IBM SOI CMOS technology

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Journal of Semiconductors 2016年第5期37卷 110-113页

作者：程知群颜国国倪文华朱丹丹徐文华李进陈帅刘国华 Key Laboratory of RF Circuit and System Education Ministry Hangzhou Dianzi University Hangzhou 310018 China Hangzhou Canaan tek Co. Ltd. Hangzhou 310018 China

This paper presents the design of single-pole six-throw （SP6T） RF switch with IBM 0.18 #m SOI CMOS technology, which can be widely used in a wireless communication system with its high performance and low cost. The circuit is designed and simulated by using an idea that the total load is divided into six branches and SOI special structures. The insertion loss is less than 0.6 dB, isolation is more than 30 dB, the input power P0.1dB for 0.1 dB compression point is more than 37.5 dBm, IIP3 is more than 70 dBm, the 2nd and the 3rd harmonic compressions are more than 96 dBc, and the control voltage is （＋2.46 V, 0, -2.46 V） in the frequency from 0.1 to 2.7 GHz.

关键词： silicon-on-insulator (SOI) complementary metal oxide semiconductor (CMOS) single-pole six-throw (SP6T) RF switch

Reasons for Charles de Gaulle Airport Collapse

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Journal of Civil Engineering and Architecture 2017年第5期11卷 411-419页

作者： Toomas Kaljas Rak tek Solutions Oy Helsinki Ylaituvantie 8 L/21 Finland

In the early morning hours of May 23, 2004, passengers in Terminal 2E at the Charles de Gaulle Airport in Paris partially collapsed resulting in several fatalities. Structural failure was caused by multiple reasons, all contributing to failure. Similar structures have been successfully erected and built around the world. One famous and comparable structure is the Berlin Main Railway Station. After investigations, it becomes clear that Charles de Gaulle Airport lacks suitable and effective geometry, which is present in Berlin Railway Station.

关键词： Charles de Gaulle airport collapse structural failure inadequate external reinforcement geometry.

Analysis of characteristic functions for equivalent circuit model in monolithic transformer

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High Technology Letters 2012年第2期18卷 124-127页

作者：吴忠洁 Lu Jingxue Huang Fengyi Jiang Nan Institute of Information Science and Engineering Southeast UniversityNanjing 210096P.R.China S-tek Research Center Aoya MicroeleclxonicsZhangjiang High-Tech ParkShanghai 201203P.R.China

A model of monolithic transformers is presented, which is analyzed with characteristic functions. A closed- form analytical approach to extract all the model parameters for the equivalent circuit of Si-based on-chip transformers is proposed. A novel de-coupling technique is first developed to reduce the complexity in the Y parameters for the transformer, and the model parameters can then be extracted analytically by a set of characteristic functions. Simulation based on the extracted parameters has been carried out for transformers with different structures, and good accuracy is obtained compared to a 3-demensional full-wave numerical electro- magnetic field solver. The presented approach will be very useful to provide a scalable and wide-band compact circuit model for Si-based RF transformers.

关键词： transformer parameter extraction compact model radio frequency integrate circuit((RFIC)

A 0.7–7 GHz wideband reconfigurable receiver RF front-end in CMOS

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Journal of Semiconductors 2018年第8期39卷 77-80页

作者： Youming Zhang Lijuan Yang Fengyi Huang Nan Jiang Xuegang Zhang Institute of RF- & OE-ICs School of Information Science and Engineering Southeast University Nanjing 210096 China S-tek (Shanghai) High-Frequency Communication Technology Co. Ltd. Shanghai 201203 China

A 0.7–7 GHz wideband RF receiver front-end So C is designed using the CMOS process. The front-end is composed of two main blocks: a single-ended wideband low noise amplifier（LNA） and an in-phase/quadrature（I/Q） voltage-driven passive mixer with IF amplifiers. Based on a self-biased resistive negative feedback topology,the LNA adopts shunt-peaking inductors and a gate inductor to boost the bandwidth. The passive down-conversion mixer includes two parts: passive switches and IF amplifiers. The measurement results show that the frontend works well at different LO frequencies, and this chip is reconfigurable among 0.7 to 7 GHz by tuning the LO frequency. The measured results under 2.5-GHz LO frequency show that the front-end SoC achieves a maximum conversion gain of 26 dB, a minimum noise figure（NF） of 3.2 dB, with an IF bandwidth of greater than 500 *** chip area is 1.67 × 1.08 mm;.

关键词： wideband LNA resistive-feedback CMOS passive mixer

Resolving Specific Psychological Stressors Can Instantly Reduce or Relieve Chronic Neck Pain and Upper Back Pain: Case Reports

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Health 2023年第10期15卷 1116-1149页

作者： Brandy Gillmore Gaetan Chevalier Stefan Kasian The Brandy Gillmore Foundation Beverly Hills CA USA Psy-tek Labs Encinitas CA USA

Introduction: The goal of this study was to use a novel approach to pain relief which includes a participant using their mind to reduce or relieve their neck pain in a matter of minutes and taking continuous thermal medical imaging scans during the process to capture any concurrent temperature changes at the location of the self-reported pain. Previous studies using multidisciplinary approaches have shown that it is possible for a person to achieve a moderate reduction in pain over a period of time (typically two or more months). However, in this innovative study, the goal was to demonstrate rapid pain relief (in a matter of minutes) using only the mind. Case report: For this study, six subjects were selected, all of whom were experiencing long-term chronic neck pain. The subjects consisted of five adult females and one adult male. Several of the subjects also had pain that radiated into their upper back region. Each subject participated in one talk therapy session during which the subject’s neck was actively scanned by a thermal imaging (TI) camera that was programmed to take a new thermal image every thirty (30) seconds. The goal of the talk therapy session was to create a strong emotional shift by encouraging the subject to let go of negative emotions and replace buried painful feelings with feelings of positive expectation and optimism. Then, as the subject created this emotional shift, the goal was to observe if this change affected the subject’s self-reported physical pain, as well as noting any visible effects in thermal images. Results: All six subjects reported that they were able to relieve some or all of their pain by the end of the talk therapy session. As they did, there was simultaneously a significant decrease in temperature recorded on the TI images in the corresponding location in their neck and upper back region. This suggested that the pain relief the subjects reported was not merely “mind over matter”, since there were marked physiological change

关键词： Neck Pain Stress Chronic Pain Cervicalgia Thermography Thermal Imaging Infrared Imaging

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tektronix公司的最新产品

现代科学仪器 1986年第3期 3-4页

最近,tektronix 公司推出了 DCS 数字照相系统,4190型高分辩率大屏幕图形投影仪及4696型彩色墨水喷射印刷机。tek 公司最近采用了 CCD 技术及其专有软件发展了一种能够捕获高速信号的新产品。采用这种方法之后,可以使摸拟示波器增添数... 详细信息

最近,tektronix 公司推出了 DCS 数字照相系统,4190型高分辩率大屏幕图形投影仪及4696型彩色墨水喷射印刷机。tek 公司最近采用了 CCD 技术及其专有软件发展了一种能够捕获高速信号的新产品。采用这种方法之后,可以使摸拟示波器增添数字化和信号处理能力,同时示波器的测量精度还有所提高。tek 公司把这种产品称为数字化照相系统(DCS—digital Camera System)。DCS 可以使模拟示波器获得1000兆赫的数字化能力。连接在示波管上的照相机可以读出

关键词：示波器 DCS MCP 摸拟 tektronix 彩色墨水图象照相机图形输出视频信号印刷机投影仪投影器 NTSC 屏幕图形

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欧盟发布能效标签容差使用指令

中国洗涤用品工业 2017年第3期 92-92,94页

作者： INTERtek inter tek

2017年2月15日,欧盟发布能效标签容差使用指令COMMISSION REGULATION（EU）2017/254。该指令将于2017年3月7日生效。冲击对象：（EU）No 1059/2010,（EU）No 1060/2010,（EU）No1061/2010,（EU）No 1062/2010,（EU）No

关键词：指令容差标签能效欧盟