检索结果-南通市图书馆

Experimental Investigation of the Small-scale Fixed Multi-chamber OWC Device

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2021年第5期34卷 408-421页

作者： Mohammad Shalby Ahmed Elhanafi paul walker David G.Dorrell Ahmad Salah Mohamed R.Gomaa Mohamed Behiri Mechanical Engineering Department Faculty of EngineeringAl-Hussein Bin Talal UniversityMa’an 71111Jordan National Centre for Maritime Engineering and Hydrodynamics Australian Maritime CollegeUniversity of TasmaniaLauncestonTAS 7250Australia School of Mechanical and Mechatronic Systems University of Technology SydneySydneyNSW 2007Australia School of Electrical and Information Engineering University of the WitwatersrandDurban 2000South Africa Electrical Engineering Department Faculty of EngineeringAl Hussein Bin Talal UniversityMa’an 71111Jordan Mechanical Engineering Department Benha Faculty of EngineeringBenha UniversityBenha 13518Egypt 不详

Sea wave energy generators or converters(WECs)have the potential to become a viable technology for clean,renewable energy *** the WEC technologies,the oscillating water columns(OWCs)are the most common WEC devices *** have been studied and developed over many ***-chamber oscillating water columns(MC-OWC)have the potential to have a higher energy conversion when extracting energy in mixed sea states than single-chamber *** the work reported in this paper,physical experiments are carried under regular wave conditions to test the wave power extraction of a fixed MC-OWC small-scale *** Power Take-Off(PTO)of the device is simulated using orifice *** flow characteristics through these orifices are pre-calibrated such that the extracted power can be obtained only using the pressure *** condition effects on the damping of the PTO of the device power extraction are *** test results illustrate that the PTO system damping is critical and affects device performance.

关键词： cean wave energy Energy conversion Oscillating water column Multi-chamber OWC

Ecological monophagy in Tasmanian Graphium macleayanum moggana with evolutionary reflections of ancient angiosperm hosts

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Insect Science 2006年第6期13卷 451-460页

作者： J. MARK SCRIBER GEOFF R. ALLEN paul W. walker School of Agricultural Science/TIAR University of Tasmania Hobart Australia Department of Entomology Michigan StateUniversity East Lansing Michigan USA

Local host plant specialization in an insect herbivore may be caused by numerous factors, including host-specific natural enemy pressures or a local lack of suitable host-plant choices that are available elsewhere in its range. Such local specialization or ＂ecological monophagy＇, for whatever reason, may reflect reduced ability to behaviourally accept or physiologically utilize other allopatric hosts that are naturally used elsewhere by the species. We tested this feeding specialization hypothesis using the Tasmanian subspecies of Macleay＇s swallowtail butterfly, Graphium macleayanum moggana （Papilionidae）, which uses only a single host-plant species, Antherosperma moschatum （southern sassafras, of the Monlmiaceae）. Further north, this same butterfly species （G. m. macleayanum） uses at least 13 host-plant species from seven genera and four families （Lauraceae, Rutaceae, Winteraceae, and Monlmiaceae）. Our larval feeding assays with G. m. moggana from Tasmania showed that certain Magnoliaceae and Lauraceae could support some larval growth to pupation. However, such growth was slower and survival was lower than observed on their normal southern sassafras host （Monimiaceae）. We also found that toxicity of particular plant species varied tremendously within plant families （for both the Magnoliceae and the Monlmiaceae）.

关键词： Antherosperma detoxification Lauraceae Magnoliaceae Monimiaceae Papilionldae phytochemistry Rutaceae specialist swallowtail butterflies Winteraceae

A Voltage Sensorless Finite Control Set-Model Predictive Control for Three-Phase Voltage Source PWM Rectifiers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electrical Engineering 2016年第2期2卷 52-59页

作者： Haitao Yang Yongchang Zhang Nong Zhang paul D.walker Jihao Gao School of Electrical Mechanicaland Mechatronic SystemsUniversity of TechnologySydneyNSW 2007Australia Inverter Technologies Engineering Research Center of Beijing North China University of TechnologyBeijing100144China

In this paper,a grid voltage sensorless model predictive control is proposed and verified by simulation and experimental tests for a PWM *** presented method is simple and cost effective due to no need of modulator and voltage *** developed sliding mode voltage observer(SMVO)can theoretically track the grid voltage accurately without phase lag and magnitude *** on the proposed SMVO,the finite control set-model predictive control(FCS-MPC)is incorporated for power *** active power and reactive power are calculated and predicted using the measured current and the estimated grid voltage from the *** the predicated power for one-step delay compensation,the best voltage vector minimizing the tracking error is selected by *** whole algorithm is implemented in stationary frame without using Park's *** the simulation and experimental results validate the effectiveness of the proposed method.

关键词： Model predictive control(MPC) voltage sensorless control sliding mode observer three-phase voltage source rectifier(VSR).

Observation of Zitterbewegung in photonic microcavities

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2023年第6期12卷 1084-1090页

作者： Seth Lovett paul M.walker Alexey Osipov Alexey Yulin Pooja Uday Naik Charles E.Whittaker Ivan A.Shelykh Maurice S.Skolnick Dmitry N.Krizhanovskii Department of Physics and Astronomy University of SheffieldS37RH SheffieldUK Department of Physics and Technology ITMO UniversitySt.Petersburg 197101Russia Science Institute University of IcelandDunhagi 3IS-107 ReykjavikIceland

We present and experimentally study the effects of the photonic spin–orbit coupling on the real space propagation of polariton wavepackets in planar semiconductor microcavities and polaritonic analogues of *** particular,we demonstrate the appearance of an analogue Zitterbewegung effect,a term which translates as‘trembling motion’in English,which was originally proposed for relativistic Dirac electrons and consisted of the oscillations of the centre of mass of a wavepacket in the direction perpendicular to its *** a planar microcavity,we observe regular Zitterbewegung oscillations whose amplitude and period depend on the wavevector of the *** then extend these results to a honeycomb lattice of coupled microcavity *** to the planar cavity,such lattices are inherently more tuneable and versatile,allowing simulation of the Hamiltonians of a wide range of important physical *** observe an oscillation pattern related to the presence of the spin-split Dirac cones in the *** both cases,the experimentally observed oscillations are in good agreement with theoretical modelling and independently measured bandstructure parameters,providing strong evidence for the observation of Zitterbewegung.

关键词： planar versatile analogues

Treatment of Swine Slurry by an Ozone Treatment System to Reduce Odor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Protection 2011年第7期2卷 867-872页

作者： A. R. Omer paul M. walker 不详

Development of a technology that can reduce the odor of liquid swine manure during agitation and land application could prove beneficial to the swine industry. The purpose of this study was to evaluate a commercial ozone treatment system for swine slurry under production scale conditions. The facility used for this study was a curtain sided finishing building housing 500 grow–finish market hogs located over a manure pit measuring 12.2 m wide × 25.9 m long × 2.4 m deep with a total pit capacity of 770,142 l, containing 577,607 l. The system evaluated exposes air to ultra-violet light creating O3. The O3 is then injected into slurry at a rate of 851.6 l/min. treating 51,097 l/h. In this study the entire pit contents were treated every 11.3 h. At 0, 24, 48, and 96 h two slurry samples were collected with a 3.05 m probe and six air sample bags were collected via a vacuum pump. No significant differences were detected in slurry samples between time periods. Mean slurry values were 13.6 ± 4.6% solids dry wt., 850 ± 70 mg/l settable solids, 54,200 ± 4384 mg/l total suspended solids, 61,050 ± 12,657 mg/l chemical oxygen demand, 0.86 ± 0.14%N, 0.49 ± 0.27%P, 0.45 ± 0.01%K and dissolved oxygen below detection limits. Ammonia concentrations decreased (P = 0.004) from 0 to 96 h. Odor panelists analyzed air samples for intensity at recognition (IR), offensiveness at recognition (OR), intensity at full strength (IFS) and offensiveness at full strength (OFS). Panelists found OR, IFS and OFS were reduced (P < 0.01) at 48 h and 96 h compared to 0 h and IR was reduced (P < 0.04) at 24 h and 48 h and not at 96 h but trended lower (P = 0.12) at 96 h. The system evaluated significantly improved air quality within the building suggesting that odor emanating from swine buildings and odor generated during land application of slurry should be reduced.

关键词： Swine Slurry Odor Treatment Ozone

Longitudinal monitoring for the emergence of epidermal growth factor C797S resistance mutations in non-small cell lung cancer using blood-based droplet digital PCR

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cancer Drug Resistance 2019年第3期2卷 912-916页

作者： Mark Bowling Hyder Arastu Victoria Edwards Leisa Jackson Scott Thurston Jordan Reese Hestia Mellert Gary Pestano paul walker East Carolina University Mail Stop 628Internal Medicine-Hematology/OncologyGreenvilleNC 27834USA Biodesix Inc.2970 Wilderness PlaceBoulderCO 80301USA.

Validation of assays for the C797S mutation as a biomarker for osimertinib resistance is promising in guiding treatment decision-making for multidrug resistant non-small cell lung cancer. A newly developed droplet digital PCR (ddPCR) assay was used to retrospectively evaluate the emergence of the C797S mutation in six remnant plasma samples in this case report. It was found that the detected emergence of C797S clearly correlated with clinical signs of treatment resistance. Had these data been available to aid treatment selection in real time, there would have been hope for recaptured disease response and control instead of treatment cessation. The results of this study show that highly sensitive ddPCR methods can be used for the monitoring of emergent epidermal growth factor somatic variant mutations in circulation.

关键词： Epidermal growth factor non-small cell lung cancer C797S drug resistance

English for Business Studies /

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于纯电动汽车的精简型无级变速器速比设计和成本分析

2008年

作者： Carolyn walker with paul Harvey.

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

汽车技术 2015年第6期 1-6页

作者：阮嘉赓张农 paul walker 方煜宏悉尼科技大学

电动汽车当前阶段的首要设计目标是获得与传统汽车相近的驾驶性能和续驶里程,且制造成本要控制在合理范围。为实现这一目标,提出了一种精简型无级变速机构,并对采用了固定速比减速器和精简型无级变速器的两种纯电动汽车的驾驶性能和能... 详细信息

电动汽车当前阶段的首要设计目标是获得与传统汽车相近的驾驶性能和续驶里程,且制造成本要控制在合理范围。为实现这一目标,提出了一种精简型无级变速机构,并对采用了固定速比减速器和精简型无级变速器的两种纯电动汽车的驾驶性能和能源利用率进行对比。结果表明,相比于固定速比减速器,精简型无级变速器提高了电机的工作效率且减少了电能消耗,同时整车制造成本和使用费用也有所降低。

关键词：纯电动汽车无级变速器成本分析

Harpoon-shift a New Conception to Implement Gearshift in Transmission

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Harpoon-shift a New Conception to Implement Gearshift in Tra...