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Study on the Drift Effect of Potassium Ion Sensing Based on the Extended Gate Field Effect Transistor

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稀有金属材料与工程 2006年第A3期35卷 259-260页

作者： jung-Chuan Chou ching-Hsiang Hsu Department of Electronic Engineering National Yunlin University of Science and TechnologyDouliouTaiwan 640China

The advantages of the extended gate field effect transistor (EGFET) compared with the ion sensitive field effect transistor (ISFET) are easy package,easy preservation,insensitive light effect,and better *** EGFET has above advantages,there are still some non-ideal effects such as drift etc..The drift behavior exists during the measurement process and results in the variation of the output voltage with *** can obtain the drift value by immersing EGFET into the pH solution for 12 hours and measure the rate of the output voltage versus time after S *** study analyzes the sensitivity, stability,and drift effect of the EGFET based on the structure of the ruthenium oxide/silicon (RuO_x/Si) wafer for measuring the potassium *** fabrication of the potassium ion sensor can be widely employed in medical detection.

关键词： potassium ion extended gate field effect transistor RuO_x/Si wafer sensitivity drift

From demand response to transactive energy: state of the art

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Journal of Modern Power Systems and Clean Energy 2017年第1期5卷 10-19页

作者： Sijie CHEN Chen-ching liu Washington State University Pullman WA 99163 USA Shanghai Jiao Tong University Shanghai 200240 China

This paper reviews the state of the art of research and industry practice on demand response and the new methodology of transactive energy. Demand response programs incentivize consumers to align their demand with power supply conditions, enhancing power system reliability and economic operation. The design of demand response programs, performance of pilot projects and programs, consumer behaviors, and barriers are *** energy is a variant and a generalized form of demand response in that it manages both the supply and demand sides. It is intended for a changing environment with an increasing number of distributed resources and intelligent devices. It utilizes the flexibility of various generation/load resources to maintain a dynamic balance of supply and demand. These distributed resources are controlled by their owners. However, the design of transaction mechanisms should align the individual behaviors with the interests of the entire system. Transactive energy features real-time, autonomous, and decentralized decision *** transition from demand response to transactive energy is also discussed.

关键词： Demand response Incentive-based program Price-based program Direct load control Transactive energy

Transient Current Estimation of MMC-HVDC Systems Under a Grid-converter Phase Difference

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CSEE Journal of Power and Energy Systems 2021年第4期7卷 730-743页

作者： Yushuang liu Meng Huang Xiaoming Zha Herbert Ho-ching Iu School of Electrical Engineering and Automation Wuhan UniversityWuhanChina School of Electrical Electronic and Computer EngineeringThe University of Western AustraliaWestern AustraliaAustralia

When a modular multilevel converter based high voltage direct current(MMC-HVDC)system operates under grid faults,there will be a phase difference between the grid voltage and the converter *** can be caused by grid voltage phase shifting and the integration effect of the phase-locked loop(PLL)in the *** system may exhibit an undesirable transient process with expanded current which is harmful for the converter *** this paper,a transient current estimation method is proposed for the scenario of converter-grid phase difference caused by the frequency shifting of the grid side.A piecewise phase calculation model is established to determine the transient phase difference of the ***,according to the maximum phase difference calculated by the model,the system stability is assessed and the maximum value of system transient current can be estimated after comparing the maximum phase difference with the critical phase difference and π,Finally,the current estimation results are verified by detailed circuit simulations of a 21-level MMC-HVDC system built in PSCAD.

关键词： Index Terms-Frequency disturbance phase difference MMC-HVDC stability analysis transient current

Introduction to the Special Issue on Intelligent Models for Security and Resilience in Cyber Physical Systems

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Computer Modeling in Engineering & Sciences 2022年第4期131卷 23-26页

作者： Qi liu Xiaodong liu Radu Grosu ching-Nung Yang School of Computer and Software Nanjing University of Information Science and TechnologyNanjing210044China School of Computing Edinburgh Napier UniversityEdinburgh018373UK Institute of Computer Engineering Vienna University of TechnologyWien1040Austria Department of Computer Science and Information Engineering National Dong Hwa UniversityHualien97401Taiwan

Cyber Physical Systems(CPS)have been appealing in recent years as a result of the rapid emergence of unique hardware and software compositions that create smart,autonomously behaving ***-to-end procedures and new types of user-machine interaction are made possible via the *** the one hand,these CPS applications have the potential to deliver crucial services in a variety of developing application areas,including energy management,healthcare,traffic monitoring,industrial assessment and surveillance.

关键词： CPS hardware services

An average-value-at-risk criterion for Markov decision processes with unbounded costs

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Frontiers of Mathematics in China 2022年第4期17卷 673-687页

作者： Qiuli liu Wai-Ki ching Junyu ZHANG Hongchu WANG School of Mathematical Sciences South China Normal UniversityGuangzhou510631China Advanced Modeling and Applied Computing Laboratory Department of MathematicsThe University of Hong KongHong KongChina School of Mathematics Sun Yat-Sen UniversityGuangzhou510275China

We study the Markov decision processes under the average-value-at-risk *** state space and the action space are Borel spaces,the costs are admitted to be unbounded from above,and the discount factors are state-action *** suitable conditions,we establish the existence of optimal deterministic stationary ***,we apply our main results to a cash-balance model.

关键词： Markov decision processes average-value-at-risk(AVaR) state-action dependent discount factors optimal policy

Estimating horizontal scale of fluctuation with limited CPT soundings

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Geoscience Frontiers 2018年第6期9卷 1597-1608页

作者： Jianye ching Tsai-jung Wu Armin W.Stuedlein Taeho Bong Department of Civil Engineering National Taiwan University School of Civil and Construction Engineering Oregon State University

The paper explores the possibility of estimating the horizontal scale of fluctuation(δ_h) with limited *** following conditions are desirable:(1) the CPT depth is large;(2) there are more than two CPTs;(3)the CPT separation distances are distinct and preferably less than 2×δ_h; and(4) the Whittle-Matern auto-correlation model is adopted.

关键词： Geotechnical engineering Site characterization Spatial variability Horizontal scale of fluctuation

Stability Analysis of PLL Influenced by Control Loops in Grid-connected Converters Under Fault Disturbance

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CSEE Journal of Power and Energy Systems 2020年第2期6卷 239-248页

作者： Yushuang liu Meng Huang Xiaoming Zha Herbert Ho-ching Iu School of Electrical Engineering and Automation Wuhan UniversityWuhan 430000China School of Electrical Electronic and Computer EngineeringThe University of Western AustraliaCrawley WA 6009Australia

When the power grid suffers from grid faults that cause phase disturbances,the grid-connected converter becomes destabilized by the interaction between the phase-locked loop(PLL)and the control *** this paper,the stability of the PLL affected by the control loop under transient grid faults is ***,the equivalent model of the PLL under the influence of the control loop is ***,different response processes of PLLs under the ground fault with various control parameters are qualitatively ***,a small-signal model is proposed to assess the stability of the PLL under different control loop *** system poles can be calculated to show the physical origin of the ***,simulations of a three-phase 21-level modular multilevel converter(MMC)built in PSCAD and a down-scale experiment is performed to verify the parameter influence of the control loop on the PLL.

关键词： Control loop grid-connected MMC ground fault phase-locked loop transient stability

The Humidity Sensor Using the Polyacrylic Emulsion Containing Magnesium Chloride

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稀有金属材料与工程 2006年第A3期35卷 369-371页

作者： ching-Han Yu jung-Chuan Chou Tai-Ping Sun Shen-Kan Hsiung Institute of Electronic Engineering Chung Yuan Christian University Chung-Li Taiwan 320 China Graduate School of Electronic Engineering National Yunlin University of Science and Technology Douliou Taiwan 640 China Department of Electrical Engineering National Chi Nan University Nantou Taiwan 545 China

An impedance type humidity sensor based on the polyacrylic emulsion containing magnesium chloride (MgCl_2) without chemical modification was *** impedances of the sensor were measured from various relative humidity in the frequency range between 0.1kHz and 100 *** sensor has a good sensitivity from 60%RH to 90%*** to the experimental results,the response time is about 240 seconds in the adsorption process and 310 seconds in the desorption process.

关键词： humidity sensor polyacrylic emulsion relative humidity desorption magnesium chloride

Study of Reducing Non-Ideal Effects Based on TiN Sensitive Electrode with Front-End Offset Circuit

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稀有金属材料与工程 2006年第A3期35卷 248-249页

作者： jung-Chuan Chou Cheng-Hsin liu Graduate School of Electronic Engineering National Yunlin University of Science and TechnologyDouliouTaiwan 640China

The structure of the extended gate ion sensitive field effect transistor (EGISFET) is similar to the structure of the ion sensitive field effect transistor (ISFET).Moreover,the non-ideal effect of EGISFET is the main impediment to development of commercial processes for sensitive *** is necessary to promote the stability and reliability of the devices by employing calibration circuits and the better fabrication *** temporal drift exists in the entire measurement experiment. Furthermore,in this study we can reduce the temporal drift effect which influences the stability of the TiN sensitive electrode with the differential front-end offset *** measurement system combines with shifting circuit,differential and instrument *** employ the calibration circuit to compare with the variations of the output voltage,and expectably improve the stability and reliability of the TiN sensitive electrode by the novel calibration circuit.

关键词： TiN sensitive electrode stability reliability temporal drift effect front-end offset circuit