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The Value of a Small Microkernel for Dreamy Memory and the RAMpage Memory Hierarchy

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Journal of Computer Science & Technology 2005年第5期20卷 586-595页

作者： philip Machanick School of ITEE University of Queensland Brisbane Qld 4072 Australia

This paper explores potential for the RAMpage memory hierarchy to use a microkernel with a small memory footprint, in a specialized cache-speed static RAM （tightly-coupled memory, TCM）. Dreamy memory is DRAM kept in low-power mode, unless referenced. Simulations show that a small microkernel suits RAMpage well, in that it achieves significantly better speed and energy gains than a standard hierarchy from adding TCM. RAMpage, in its best 128KB L2 case, gained 11% speed using TCM, and reduced energy 14%. Equivalent conventional hierarchy gains were under 1%. While 1MB L2 was significantly faster against lower-energy cases for the smaller L2, the larger SRAM＇s energy does not justify the speed gain. Using a 128KB L2 cache in a conventional architecture resulted in a best-case overall run time of 2.58s, compared with the best dreamy mode run time （RAMpage without context switches on misses） of 3.34s, a speed penalty of 29%. Energy in the fastest 128KB L2 case was 2.18J vs. 1.50J, a reduction of 31%. The same RAMpage configuration without dreamy mode took 2.83s as simulated, and used 2.393, an acceptable trade-off （penalty under 10%） for being able to switch easily to a lower-energy mode.

关键词： low-power design main memory virtual memory cache memories microkernels

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空客时刻

商业周刊（中文版） 2024年第4期 10-14页

作者： Siddharth philip Anthony Palazzo Julie Johnsson Charlotte Ryan Danny Lee Mary Schlangenstein 晴川(译) 不详

●对手波音正因737Max的质量问题而深陷泥沼,借此时机,空客已开始规划全新机型,以期在未来数十年里称霸业内1987年初,法国南部某机场内上演了不同寻常的一幕。当时还是王储的查尔斯王子站在一个登机扶梯上,轻轻地将一个超大瓶内的香槟... 详细信息

●对手波音正因737Max的质量问题而深陷泥沼,借此时机,空客已开始规划全新机型,以期在未来数十年里称霸业内1987年初,法国南部某机场内上演了不同寻常的一幕。当时还是王储的查尔斯王子站在一个登机扶梯上,轻轻地将一个超大瓶内的香槟洒在空客SE A320喷气机的机头上,他的妻子戴安娜王妃看着这一切,脸上带着她标志性的似显困惑的微笑。随后,现场激光华彩、干冰升腾,为1400名到场嘉宾开启了一场奢华庆典——毕竟,那是在80年代。

关键词：法国南部 A320 空客

Optimal Placement of Wind Turbines in Wind Farm Layout Using Particle Swarm Optimization

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Journal of Modern Power Systems and Clean Energy 2021年第2期9卷 367-375页

作者： philip Asaah Lili Hao Jing Ji the College of Electrical Engineering and Control Science Nanjing Tech UniversityNanjing 210008China

An optimal geographical location of wind turbines can ensure the optimum total energy output of a wind *** study introduces a new solution to the optimization of wind farm layout(WFLO)problem based on a three-step strategy and particle swarm optimization as the main *** proposed strategy is applied to a certain WFLO to generate highly efficient optimal output *** case scenarios are considered to formulate the non-wake and wake effects at various *** required wind turbine positions within the wind farm are determined by the particle swarm optimization *** rule of thumb,which determines the wind turbine spacing,is thoroughly *** MATLAB simulation results verify the proposed three-step ***,the results are compared with those of existing research works,and it shows that the proposed optimization strategy yields a better solution in terms of total output power generation and efficiency with a minimized objective *** efficiencies of the three case studies considered herein increase by 0.65%,1.95%,and 1.74%,***,the simulation results indicate that the proposed method is robust in WFLO design because it further minimizes the objective function.

关键词： Jensen model particle swarm optimization wake effect wind farm layout(WFLO) wind turbine

The Influence of Underlying Stresses from Environmental Hazards on Resilience in Bangladesh: A System View

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International Journal of Disaster Risk Science 2019年第4期10卷 511-528页

作者： philip Lake Richard Fenner Building Sustainability Group ArupLondon W1T 4BQUK Centre for Sustainable Development Engineering DepartmentCambridge UniversityCambridge CB21TNUK

Bangladesh is one of the countries most vulnerable to climate change,while its people also suffer from a range of environmental hazards linked to the growing prevalence of non-communicable *** diseases are responsible for increasing morbidity and mortality and lead to other stresses within the *** stresses create continuous impacts on the health and well-being of the population,compounding their vulnerability and inhibiting their capacity to cope with frequent event-related shocks,such as floods and drought.A systems approach is taken to examine four important environmental hazards in Bangladesh—arsenic contamination of drinking water,arsenic transmission through the food chain,indoor air quality,and air pollution.A review of these hazards is presented in a conceptual framework that links human well-being with the key system components of infrastructure,institutions,knowledge,and *** reveals key underlying factors between the hazards and uncovers system structures that can lead to more effective hazard mitigation,and the establishment of strategic intervention *** article concludes that elimination of these continuous stresses will only come about through the culmination of multiple interventions over time,undertaken in an iterative manner that builds on the continual advancement of hazard *** role of individual behaviors,together with factors such as risk awareness and perception of the hazards,has been identified as crucial for achieving successful mitigation *** knowledge of the hazards,public awareness,and government accountability are focus points to reduce population exposure and enhance response capacity.

关键词： Air pollution Arsenic contamination Bangladesh Drinking water contamination Environmental hazards Resilience

A proposed U.S./China theoretical/experimental collaborative effort on baryon resonance extraction

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Chinese Physics C 2009年第12期33卷 1222-1229页

作者： philip L. Cole Idaho State University Department of Physics Pocatello Idaho 83209-8106 USA

In this paper we discuss the reasons for our work towards establishing a new collaboration between Jefferson Lab （JLab） and the Institute of High Energy Physics （IHEP） in Beijing. We seek to combine experimentalists and theorists into a dedicated group focused on better understanding the current and future data from JLab and from the Beijing Electron Positron Collider （BEPC）. Recent JLab results on the extraction of single- and double-polarization observables in both the lπ- and 2π-channel show their high sensitivity to small production amplitudes and therefore their importance for the extraction of resonance parameters. The Beijing Electron Spectrometer （BES） at the BEPC has collected high statistics data on J/ψ production. Its decay into baryon-antibaryon channels offers a unique and complementary way of probing nucleon resonances. The CEBAF Large Acceptance Spectrometer, CLAS, has access to N＊ form factors at high Q2 which is advantageous for the study of dynamical properties of nucleon resonances, while the low-background BES results will be able to provide guidance for the search for less-dominant excited states at JLab. Moreover, with the recently approved experimental proposal Nucleon Resonance Studies with CLAS12 and the high-quality data streaming from BES-Ⅲand CLAS, the time has come for forging a new Trans-Pacific collaboration of theorists and experimentalists on NSTAR physics.

关键词： baryon resonances electromagnetic form factors J/ψ production CEBAF Large AcceptanceSpectrometer (CLAS) Jefferson Laboratory (JLab) Beijing Electron Spectrometer (BES) Beijing ElectronPositron Collider (BEPC) Institute of High Energy Physics (IHEP)

Model-based and Fuzzy Logic Approaches to Condition Monitoring of Operational Wind Turbines

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International Journal of Automation and computing 2015年第1期12卷 25-34页

作者： philip Cross Xiandong Ma Engineering Department Lancaster University

It is common for wind turbines to be installed in remote locations on land or offshore, leading to difficulties in routine inspection and maintenance. Further, wind turbines in these locations are often subject to harsh operating conditions. These challenges mean there is a requirement for a high degree of maintenance. The data generated by monitoring systems can be used to obtain models of wind turbines operating under different conditions, and hence predict output signals based on known inputs. A model-based condition monitoring system can be implemented by comparing output data obtained from operational turbines with those predicted by the models, so as to detect changes that could be due to the presence of faults. This paper discusses several techniques for model-based condition monitoring systems: linear models, artificial neural networks, and state dependent parameter "pseudo" transfer *** models are identified using supervisory control and data acquisition(SCADA) data acquired from an operational wind firm. It is found that the multiple-input single-output state dependent parameter method outperforms both multivariate linear and artificial neural network-based approaches. Subsequently, state dependent parameter models are used to develop adaptive thresholds for critical output signals. In order to provide an early warning of a developing fault, it is necessary to interpret the amount by which the threshold is exceeded, together with the period of time over which this occurs. In this regard, a fuzzy logic-based inference system is proposed and demonstrated to be practically feasible.

关键词： Condition monitoring wind turbines artificial neural network state dependent parameter model fuzzy logic

Interleukin-1 and estrogen protect against disseminating dentoalveolar infections

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International Journal of Oral Science 2017年第1期9卷 16-23页

作者： hesham youssef philip stashenko host-microbiome center department of applied oral sciencesthe forsyth instituteCambridgeUSA

Dentoalveolar bacterial infections cause localized tissue and bone destruction, but usually remain well-localized within teeth in immunocompetent hosts. However, in certain cases these infections may invade head and neck tissues, resulting in orofacial abscesses, cellulitis and sepsis, with resultant high morbidity and even mortality. In the present studies, we developed a novel model of spreading dentoalveolar infections in mice by treatment with neutralizing antibodies against both interleukin-la （IL-1a） and IL-1β. Surprisingly male but not female mice given anti-lL-1 antibodies developed orofacial abscesses, weight loss, splenomegaly and sepsis. Female mice developed abscesses and sepsis comparable to males following ovariectomy （OVX）, which was reversed by estrogen supplementation. Anti-lL-1 blockade inhibited IL-12, interferon y （IFNy） and IL-6 but not IL-IO expression in infrabony lesions, suggestive of a local anti-inflammatory response. There was greater infiltration of neutrophils and other inflammatory ceils into lesions in anti-lL-l-treated animals; however, blood leukocytes had reduced bacterial phagocytic and killing activity ex vivo. Estrogen directly stimulated IL-1 production by macrophages, suggesting that the resistance of females to disseminating dentoalveolar infections may be due to their heightened pro-inflammatory responses following bacterial challenge, leading to enhanced localization of these infections.

关键词： cytokines dentoalveolar disseminating infections estrogen neutrophils

Double-up for single-ion masses

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Nuclear Science and Techniques 2023年第7期34卷 159-161页

作者： philip M.Walker Department of Physics University of SurreyGuildford GU27XHUK

A cunning addition for the determination of nuclear masses provides world-leading sensitivity for accurate *** is already opening up new physics and *** may sound simple to weigh an atomic nucleus,but there is more to it than you might think,especially when the nucleus is very *** out the properties of such fleeting nuclei,perhaps surviving for only a few milliseconds,can solve long-standing science ***-lived nuclei are key to our understanding not only of how neutrons and protons bind together in nuclei,but also of the way that explosive events in the cosmos tell us about the life cycle of stars.

关键词： addition unstable stars

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RNA:掌控生命后台

环球科学 2024年第13期 24-31页

作者：菲利普·鲍尔付向东(翻译) 不详西湖大学生命科学学院和医学院

数一年的研究表明,大量曾被科学家认为是“垃圾DNA”的区域,实际会编码一种名为非编码RNA的分子。这些RNA不会参与蛋白质合成,却会以多种方式影响生命运作,并为药物开发提供了新的方向。21世纪初,人类基因组的30亿个DNA组成单元差不多... 详细信息

数一年的研究表明,大量曾被科学家认为是“垃圾DNA”的区域,实际会编码一种名为非编码RNA的分子。这些RNA不会参与蛋白质合成,却会以多种方式影响生命运作,并为药物开发提供了新的方向。21世纪初,人类基因组的30亿个DNA组成单元差不多已全部鉴定完成。彼时,一群科学家正试图弄清楚所有DNA的功能,其中就包括现就职于美国国立卫生研究院(NIH)的遗传学家托马斯·金格拉斯(Thomas Gingeras)。

关键词：遗传学家人类基因组蛋白质合成非编码RNA 药物开发 DNA