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Preface

Preface

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： mimi j.hill Lisa Tauxe University of Liverpool LiverpoolUK Scripps Institution of Oceanography La JollaUSA

The geomagnetic field is believed to be generated by dynamo processes taking place in the Earth’s fluid core where the complex motion of an electrically conducting fluid provides the inductive action to sustain the *** of understanding how Earth’s magnetic field is generated and maintained,how it evolved over the past 3 billion years,and how the long-term history of the geodynamo offers insights into deep interior processes are some of the foremost challenges in modern *** such complex problems,requires comprehensive and cross disciplinary research

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Reply to comment by *** on“Experimental reassessment of the Shaw paleointensity method using laboratory-induced thermal remanent magnetization”

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Reply to comment by *** on“Experimental reassessment of the...

中国科学院地质与地球物理研究所2003学术年会

作者： john Shaw mimi j.hill Geomagnetism Laboratory University of LiverpoolLiverpoolUK.

INDEX TERMS:1521 Geomagnetism and Paleomagnetism:Paleointensity;,1540 Geomagnetism and Paleomagnetism:Rock and mineral magnetism;1594 Geomagnetism and Paleomagnetism:Instruments and techniques;*** [1]Pan et al.’s[2002]aim was to investigate the reliability of the Shaw paleointensity method[Shaw,1974;Kono,1978;Rolph and Shaw,1985]using basalt samples containing laboratory-induced thermal remanent magnetization as the natural remanent magnetization(NRM).The Shaw method usesalternating field(AF) demagnetization of

关键词： paleointensity Shaw method anhysteretic remanent magnetization alteration P value

Experimental reassessment of the Shaw paleointensity method using laboratory-induced thermal remanent magnetization

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Experimental reassessment of the Shaw paleointensity method ...

中国科学院地质与地球物理研究所2002学术年会

作者： john Shaw mimi j.hill Geomagnetism Laboratory University of LiverpoolLiverpoolUK

Artificial thermoremanent magnetization imposed on natural basalt samples was used to check the reliability of Shaw’s palaeointensity method[Shaw,1974;Kono,1978;Rolph and Shaw,1985] and to give an indication of the accuracy of ***,thermal remanence was induced in all samples(50 in total) in a known field(50±0.1 mT).This remanence was regarded as the"original"natural remanent magnetization("NRM").The samples were divided in to three subsets(A, B,and C) and intensity experiments were *** subset of samples used different thermal remanent magnetization(TRM) acquisition ***-magnetic properties on 14 representative subsamples were also measured both before and after the TRM acquisition steps to monitor possible magnetochemical *** has been demonstrated that intensity estimates by the Shaw method give values close to the expected value(50±5mT) in all three sets of basalt *** modified method with Rolph and Shaw[1985]correction,i.e.,using ratios of anhysteretic remanent magnetization given before the TRM step(ARM1) and after(ARM2),is proved to be a powerful approach to correct the TRM capacity changes that result from agnetochemical *** is especially so for sample set C, where the samples were heated up to 700 and then were held at this temperature for 40 min during TRM *** correction,45%of set C samples gave acceptable ***,some samples with strong magnetochemical alteration sometimes invalidated the ARM1/ARM2 ratio correction and gave wrong intensity *** rock magnetic properties is therefore very important when applying the Shaw method.

关键词： paleointensity thermal remanent magnetization Shaw method rock magnetic checks

Thellier-type paleointensity data from multidomain specimens

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Thellier-type paleointensity data from multidomain specimens

A Multi-parametric Programming Based Analytic Method to Compute Consumer Offer Curve for Reserves

中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Greig A.Paterson Andrew j.Biggin Emma Hodgson mimi j.hill Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences

Identifying and excluding inaccurate paleointensity estimates that can arise from the effects of multidomain(MD) particles remains a key challenge for paleointensity studies. Here we approach this problem by incorporating realistic experimental noise into a phenomenological MD model, systematically exploring the parameter space of paleointensity experiments(the choice of protocol, laboratory field strengths and directions), applying optimization algorithms to the model predictions, and testing these against experimental datasets. The results allow us to conclude that:(1) In some cases, applying the lab field in a direction [60 from the NRM direction and with a magnitude～2 times larger than the ancient field may help to produce more linear and accurate Arai plots by allowing partial thermoremanent magnetization(p TRM) tails to compensate from excess natural remanent magnetization(NRM) loss, the mechanism behind typical MD Arai plot curvature.(2) The recently proposed FRAC criterion is consistently better at isolating accurate results than the traditionally used f parameter and should ideally have minimum values of 0.65, 0.45, 0.65, and 0.55 for the Thellier, Coe, Aitken, and IZZI protocols, respectively.(3) Newly developed sets of selection criteria(MC-CRIT) should maximize the likelihood of accepting accurate estimates from a suite of specimens influenced by MD behavior. The models, methods, and data presented here provide the means to objectively define data selection and demonstrate the effectiveness of a given set of criteria. Such approaches are vital, if we wish to remove the arbitrariness that hinders the identification of reliable paleointensity data.

关键词： Paleointensity Archeointensity Multidomain Non-ideal behavior

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journal of Modern Power Systems and Clean Energy 2022年第2期10卷 542-546页

作者： Weiye Zheng David j.hill Wenchuan Wu the School of Electrical Power Engineering South China University of TechnologyGuangzhouChina the Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina the Department of Electrical Engineering Tsinghua UniversityBeijingChina

Abstract-An analytic method is proposed to compute the price-reserve offer curve at the consumer level in hierarchical direct load *** convexification of the consumer reserve provision is examined,and the analytic expression of the optimal solution within each critical region is ***,based on multi-parametric programming,a combinatorial enumeration method in conjunction with efficient reduction and pruning strategy is proposed to compute the optimal response of consumers in the whole price *** tests along with an application example in the bi-level aggregator pricing problem demonstrate the merit of this method.

关键词： Direct load control multi-parametric programming price-reserve offer curve analytic solution

Semi-transparent,flexible,and electrically conductive silicon mesh by capillarity-driven welding of vapor-liquid-solid-grown nanowires over large areas

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Nano Research 2020年第5期13卷 1465-1471页

作者： Thomas A.Celano Seokhyoung Kim David j.hill james F.Cahoon Department of Chemistry University of North Carolina at Chapel HillChapel HillNC 27599-3290USA

Bottom-up synthesis of semiconductor nanowires(NWs)by the vapor-liquid-solid(VLS)mechanism has enabled diverse technological applications for these *** metallic NWs,however,it has been challenging to form large-area interconnected NW ***,we generate centimeter-scale meshes of mechanically and electrically interconnected Si NWs by sequentially growing,collapsing,and joining the NWs using a capillarity-driven welding *** fabricate meshes from VLS-grown NWs ranging in diameter from 20 to 100 nm and find that the meshes are three-dimensional with a thickness ranging from^1 to^10 microns depending on the NW *** extinction measurements reveal that the networks are semi-transparent with a color that depends on the absorption and scattering characteristics of individual ***,active voltage contrast imaging of both centimeter-and micron-scale meshes reveals widespread electrical *** a sacrificial layer,we demonstrate that the mesh can be liberated from the growth substrate,yielding a highly flexible and transparent *** transport measurements both on the growth substrate and on liberated,flexible films reveal electrical conduction across a centimeter scale with a sheet resistance of^160-180 kΩ/square that does not change significantly upon *** the ability to encode complex functionality in semiconductor NWs through the VLS process,we believe these meshes of networked NWs could find application as neuromorphic memory,electrode scaffolds,and bioelectronic interfaces.

关键词： semiconductor nanowire conductive network flexible electronics welding thermal annealing active-voltage contrast

基于免疫优化的电力系统电压安全非线性预测控制

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电力系统自动化 2004年第16期28卷 25-31页

作者：李艳君 David j.hill 吴铁军浙江大学工业控制技术国家重点实验室浙江省杭州市310027 香港城市大学电子工程系

提出了一种基于免疫优化的非线性预测控制方法来求解电力系统电压安全控制问题。采用基于非线性微分一代数方程的电力系统模型来预测系统行为。提出一种目标分段协调方法,以便在不同的预测时段根据系统响应情况调整各子目标的重要性,通... 详细信息

提出了一种基于免疫优化的非线性预测控制方法来求解电力系统电压安全控制问题。采用基于非线性微分一代数方程的电力系统模型来预测系统行为。提出一种目标分段协调方法,以便在不同的预测时段根据系统响应情况调整各子目标的重要性,通过Pareto意义下的目标加权将这些子目标集成为一个集总目标函数。提出一种免疫算法,用具有多基因链结构的抗体来表达复杂优化问题的候选解特征;采用模式识别技术提取优良抗体的基因模式,并利用算法的学习和记忆能力识别各预测时段内已求解的优化问题类型,为未来预测时段内的最优解搜索过程估计出较好的初始解,加快最优解搜索速度。将此方法和基于树搜索算法的非线性预测控制方法通过一个6母线电力系统实例进行了仿真研究,性能比较的结果表明,本文提出的算法具有更强的优化搜索能力和更好的实时性。

关键词：模型预测控制非线性系统免疫算法电压安全控制电力系统控制

Dynamical Pattern Classification

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Dynamical Pattern Classification

2003年中国智能自动化会议

作者： David j.hill Department of Electronic Engineering City University of Hong Kong Tat Chee Avenue KowloonHong KongP.R.China

In the past, through a deterministic learning method, dynamical patterns were effectively represented in a timeinvariant manner, using a locally accurate NN approximation of the underlying system dynamics. A similarity definition for dynamical patterns was also given based on system dynamics. Moreover, a novel mechanism was presented, through which rapid recognition of dynamical patterns can be implemented by state synchronization within a closed-loop recognition system. Based on these results, in this paper, we further investigate the construction of a recognition system for classification of dynamical patterns. With the synchronization errors being taken as the measure of similarity between the test and training patterns, the recognition system is built up by using the principle of minimal distance or nearest-neighbor ciassification. The recognition system consists of many dynamical models, each of them representing one training dynamical pattern. With the help of the qualitative analysis of dynamical systems, the dynamical template models are arranged in some specific order, such that an inclusive classification of various types of dynamic patterns is provided, and that a hierarchical structured knowledge representation can be set up based on the similarity of system dynamics. Simulation studies are included to demonstrate the effectiveness of the proposed approach.

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L2-Gain Analysis of Switched Nonlinear Systems

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L2-Gain Analysis of Switched Nonlinear Systems

第二十三届中国控制会议

作者： David j.hill Department of Electronic Engineering City University of Hong Kong

＜正＞ This paper presents a representation of L2 -gain of switched nonlinear systems in state space form by using multiple Lyapunov functions. Stability follows from this L2 -gain. Under some asymptotic detectability, global asymptotic stability is also guaranteed: A stronger version of this L2-gain gives rise to a solution of H∞control.

关键词： L2 -gain Switched systems Stability H∞ control.