检索结果-南通市图书馆

Autonomous Dual Active Power-frequency Control in Power System with Small-scale Photovoltaic Power Generation

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 941-953页

作者： Noha Harag Masaki Imanaka Muneaki Kurimoto Shigeyuki Sugimoto Hassan Bevrani Takeyoshi Kato Electrical Engineering Department of nagoya university NagoyaJapan university of Kurdistan SanandajIran Institute of Materials and Systems for Sustainability of nagoya university NagoyaJapan

Active power control of the photovoltaic(PV)power generation system is a promising solution to regulate frequency fluctuation in a power system with high penetration of renewable *** paper proposes an autonomous active power control of a small-scale PV system for supporting the inertial response of synchronous generators and power-frequency *** the proposed control approach,an effective grid frequency regulation scheme is realized using slow-and fast-frequency responses.A low-pass filter based frequency measurement is used for slow-frequency response,while direct frequency measurement is used for fast-frequency *** designed dual droop characteristic-based control is shaped to achieve a smooth transition between slow-and fast-frequency *** performance of the proposed control approach is demonstrated for serious disturbance scenarios,i.e.,considerable power-load imbalance and generation *** the powerload imbalance test scenario,the proposed control approach works properly within the normal frequency deviation region even when the frequency deviation exceeds that region *** the generation trip test,the frequency deviation is mitigated quickly,and the employed droop control is smoothly transferred from the slow-to fast-frequency responses.

关键词： Dual droop control fast-frequency response slow-frequency response inertial response power-frequency control regulation support

Usefulness of the Japanese version of Rapid Dementia Screening Test for mild cognitive impairment in older patients with cardiovascular disease:a cross-sectional study

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2021年第4期18卷 245-251页

作者： Takuji Adachi Yuki Tsunekawa Akihito Matsuoka Daisuke Tanimura Department of Integrated Health Sciences Nagoya University Graduate School of MedicineNagoyaJapan Department of Rehabilitation Nagoya Ekisaikai HospitalNagoyaJapan Department of Cardiology Nagoya Ekisaikai HospitalNagoyaJapan

BACKGROUND Cognitive decline is common among older patients with cardiovascular disease(CVD) and can decrease their self-management abilities. However, the instruments for identifying mild cognitive impairment(MCI) are not always feasible in clinical practice. Therefore, this study evaluated whether MCI could be detected using the Japanese version of the Rapid Dementia Screening Test(RDST-J), which is a simple screening tool for identifying cognitive *** This retrospective single-center study included patients who were ≥ 65 years old and hospitalized because of *** with a pre-hospitalization diagnosis of dementia were excluded. Each patient's cognitive function had been measured at discharge using the RDST-J and the Japanese version of the Montreal Cognitive Assessment(Mo CA-J), which is a standard tool for MCI screening. The correlation between the two scores was evaluated using Spearman's rank correlation coefficient. Receiver operating characteristic(ROC) analysis was also to evaluate whether the RDST-J could identify MCI, which was defined as a Mo CA-J score of ≤ 25 *** The study included 78 patients(mean age: 77.2 ± 8.9 years). The RDST-J and Mo CA-J scores were strongly correlated(r = 0.835, P < 0.001). The ROC analysis revealed that an RDST-J score of ≤ 9 points provided 75.4% sensitivity and 95.2% specificity for identifying MCI, with an area under the curve of 0.899(95% CI: 0.835-0.964). The same cut-off value was identified when excluding patients with a high probability of dementia(RDST-J score of ≤ 4 points).CONCLUSIONS The RDST-J may be a simple and effective tool for identifying MCI in older patients with CVD.

关键词： CVD MCI Usefulness of the Japanese version of Rapid Dementia Screening Test for mild cognitive impairment in older patients with cardiovascular disease:a cross-sectional study

Molecules with a TEMPO-based head group as high-performance organic friction modifiers

在线全文

学校读者我要写书评

暂无评论

Friction 2023年第2期11卷 316-332页

作者： Jinchi HOU Masaki TSUKAMOTO Seanghai HOR Xingyu CHEN Juntao YANG Hedong ZHANG Nobuaki KOGA Koji YASUDA Kenji FUKUZAWA Shintaro ITOH Naoki AZUMA Department of Complex Systems Science Graduate School of InformaticsNagoya UniversityNagoya 464-8601Japan Institute of Materials and Systems for Sustainability Nagoya UniversityNagoya 464-8601Japan Department of Micro-Nano Systems Engineering Graduate School of EngineeringNagoya UniversityNagoya 464-8603Japan

High-performance organic friction modifiers(OFMs)added to lubricating oils are crucial for reducing energy loss and carbon *** establish a new class of OFMs,we measured the friction and wear properties of N-(2,2,6,6-tetramethyl-1-oxyl-4-piperidinyl)dodecaneamide referred to as *** effect of its head group chemistry,which is characterized by a rigid six-membered ring sandwiched by an amide group and a terminal free oxygen radical,was also investigated with both experiments and quantum mechanical(QM)*** measurement results show that C12Amide-TEMPO outperforms the conventional OFMs of glyceryl monooleate(GMO)and stearic acid,particularly for load-carrying capacity,wear reduction,and stability of friction over *** friction and wear reduction effect of C12Amide-TEMPO is also greatly superior to those of C12Ester-TEMPO and C12Amino-TEMPO,in which ester and amino groups replace the amide group,highlighting the critical role of the amide *** QM calculation results suggest that,in contrast to C12Ester-TEMPO,C12Amino-TEMPO,and the conventional OFMs of GMO and stearic acid,C12Amide-TEMPO can form effective boundary films on iron oxide surfaces with a unique double-layer structure:a strong surface adsorption layer owing to the chemical interactions of the amide oxygen and free radical with iron oxide surfaces,and an upper layer owing to the interlayer hydrogen-bonding between the amide hydrogen and free radical or between the amide hydrogen and ***,the intralayer hydrogen-bonding in each of the two layers is also *** suggest that in addition to strong surface adsorption,the interlayer and intralayer hydrogen-bonding also increases the strength of the boundary films by enhancing the cohesion strength,thereby resulting in the high tribological performance of *** findings in this study are expected to provide new hints for the optimal molecular design of OFMs.

关键词： organic friction modifiers(OFMs) TEMPO friction and wear surface adsorption molecular reactivity boundary lubrication

Tracking Pedestrians Under Occlusion in Parking Space

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第3期44卷 2109-2127页

作者： Zhengshu Zhou Shunya Yamada Yousuke Watanabe Hiroaki Takada Graduate School of Informatics Nagoya UniversityNagoya464-8601Japan Institute of Innovation for Future Society Nagoya UniversityNagoyaAichiJapan

Many traffic accidents occur in parking *** of the serious safety risks is vehicle-pedestrian ***,with the increasing development of automatic driving and parking technology,parking safety has received significant attention from vehicle safety ***,pedestrian protection in parking lots still faces many *** example,the physical structure of a parking lot may be complex,and dead corners would occur when the vehicle density is *** lead to pedestrians’sudden appearance in the vehicle’s path from an unexpected position,resulting in collision accidents in the parking *** advocate that besides vehicular sensing data,high-precision digital map of the parking lot,pedestrians’smart device’s sensing data,and attribute information of pedestrians can be used to detect the position of pedestrians in the parking ***,this subject has not been studied and explored in existing *** this void,this paper proposes a pedestrian tracking framework integrating multiple information sources to provide pedestrian position and status information for vehicles and protect pedestrians in parking *** also evaluate the proposed method through real-world *** experimental results show that the proposed framework has its advantage in pedestrian attribute information extraction and positioning *** can also be used for pedestrian tracking in parking spaces.

关键词： Pedestrian positioning object tracking LiDAR attribute information sensor fusion trajectory prediction Kalmanfilter

Controllable fabrication of carbon aerogels

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2006年第z1期25卷 284-288页

作者： TANEMURA Sakae TANEMURA Masaki SUZUKI Kenzi Department of Environmental Technology & Urban Planning Nagoya Institute of Technology Showa-ku Nagoya 466-8555 Japan EcoTopia Science Institute Nagoya University Chikusa-ku Nagoya Japan

Nano-pore carbon aerogels were prepared by the sol-gel polymerization of resorcinol (1,3-dihydroxybenzene)(C6H4(OH)2) with formaldehyde (HCHO) in a slightly basic aqueous solution, followed by super-critical drying under liquid carbon dioxide as super-critical media and carbonization at 700 ℃ under N2 gas atmosphere. The key of the work is to fabricate carbon aerogels with controllable nano-pore structure, which means extremely high surface area and sharp pore size distribution. Aiming to investigate the effects of preparation conditions on the gelation process, the bulk density, and the physical and chemical structure of the resultant carbon aerogels, the molar ratio of R/C (resorcinol to catalyst) and the amount of distilled water were varied, consequently two different sets of samples, with series of R/C ratio and RF/W (Resorcinol-Formaldehyde to water, or the content of reactant) ratio, were prepared. The result of N2 adsorption/desorption experiment at 77 K shows that the pore sizes decreasing from 11.4 down to 2.2 nm with the increasing of the molar ratio of R/C from 100 to 400, and/or, the pore sizes decreasing from 3.8 down to 1.6 nm with the increasing of reactant content from 0.4 to 0.6.

关键词： resorcinol-formaldehyde aerogels carbon aerogels super-critical drying N2 adsorption/desorption

Study of older male drivers’driving stress compared with that of young male drivers

在线全文

学校读者我要写书评

暂无评论

Journal of Traffic and Transportation Engineering(English Edition) 2020年第4期7卷 467-481页

作者： Yannmq Zhao Toshiyuki Yamamoto Ryo Kanamori Department of Civil Engineering Nagoya UniversityNagoya 464-8603Japan Institute 0f Materials and Systems for Sustainability Nagoya UniuersityNagoya 464-8603Japan Institute of Innovation for Future Society Nagoya UniversityNagoya 464-8603Japan

In this study,older male drivers’stress while driving in straight links and while proceeding through intersections is *** area network(CAN),self-reported stress(SRS),and physiological data was collected in 22.4 km-long experimental trips among older and young ***,this study finds that older drivers reported much less stress than young ***,principal components(PCs)of the physiological data demonstrate that older drivers might underrate their driving stress in entire trips,except regarding turning at ***,following other vehicles reduced older drivers’driving stress because preceding vehicles might help them control driving speed,detect the path,and prevent road *** contrast,the similar condition increased the stress level of young *** results of random effects regression models confirm that age was the significant impact factor on SRS and physiological *** examining whether the stress at intersections could affect their driving behaviors,significant difference between two age groups was found neither in turning time nor in the driving *** study also confirms that physical and mental changes with aging can negatively affect older adults’*** the relationships among stress,speed,and accidents,we suggest the provision of more driver assistance systems,training,and education and improving intersection design for older drivers.

关键词： Driving behavior Driving stress Older driver Intersection Straight road

Length-Sorted Semiconducting Carbon Nanotubes for High-Mobility Thin Film Transistors

在线全文

学校读者我要写书评

暂无评论

Nano Research 2011年第10期4卷 963-970页

作者： Yasumitsu Miyata Kazunari Shiozawa Yuki Asada Yutaka Ohno Ryo Kitaura Takashi Mizutani Hisanori Shinohara Department of Chemistry and Institute for Advanced Research Nagoya University Nagoya 464-8602 Japan Department of Quantum Engineering Nagoya University Nagoya 464-8603 Japan

We have developed a process for chemical purification of carbon nanotubes for solution-processable thin-film transistors （TFTs） having high mobility. Films of the purified carbon nanotubes fabricated by simple drop coating showed carrier mobilities as high as 164 cm2V-1s -1 normalized transconductances of 0.78 Sm-1 and on/off current ratios of 10^6. Such high performance requires the preparation of a suspension of micrometer-long and highly purified semiconducting single-walled carbon nanotubes （SWCNTs）. Our purification process includes length and electronic-type selective trapping of SWCNTs using recycling gel filtration with a mixture of surfactants. The results provide an important milestone toward printed high-speed and large-area electronics with roll-to-roll and ink-jet device fabrication.

关键词： Single-walled carbon nanotubes separation thin-film transistors gel filtration dispersion optical absorption carrier mobility

Cell surface protein engineering for high-performance whole-cell catalysts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2017年第1期11卷 46-57页

作者： Hajime Nakatani Katsutoshi Hori Department of Biotechnology Graduate School of Engineering Nagoya University Nagoya 464-8603 Japan

Cell surface protein engineering facilitated by accumulation of information on genome and protein structure involves heterologous production and modifica- tion of cell surface proteins using genetic engineering, and is important for the development of high-performance whole-cell catalysts. In this field, cell surface display is a major technology by exposing target proteins, such as enzymes, on the cell surface using a cartier protein. The target proteins are fused to the carrier proteins that transport and tether them to the cell surface, as well as to a secretion signal. This paper reviews cell surface display systems for prokaryotic and eukaryotic cells from the perspective of carrier proteins, which determine the number of displayed molecules, and the localization, size, and direction （N- or C-terminal anchoring） of the passengers. We also discuss advanced methods for displaying multiple enzymes and a new method for the immobilization of whole-cell catalysts using adhesive surface proteins.

关键词： cell surface engineering surface display,whole-cell catalysts bioprocess

Biological properties of self-assembled nanofibers of elastin-like block polypeptides for tissue-engineered vascular grafts:platelet inhibition,endothelial cell activation and smooth muscle cell maintenance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2023年第1期10卷 386-395页

作者： Kazuki Natsume Jin Nakamura Kazuhide Sato Chikara Ohtsuki Ayae Sugawara-Narutaki Department of Materials Chemistry Graduate School of EngineeringNagoya UniversityNagoya 464-8603Japan Department of Biological Functions Engineering Graduate School of Life Science and Systems EngineeringKyushu Institute of TechnologyFukuoka 808-0196Japan Institute for Advanced Research Nagoya UniversityNagoya 464-8601Japan Department of Respiratory Medicine Graduate School of MedicineNagoya UniversityNagoya 466-8560Japan Department of Energy Engineering Graduate School of EngineeringNagoya UniversityNagoya 464-8603Japan

Strategic materials design is essential for the development of small-diameter,tissue-engineered vascular ***-assembled nanofibers of elastin-like polypeptides represent promising vascular graft components as they replicate the organized elastin structure of native blood ***,the bioactivity of nanofibers can be modified by the addition of functional peptide *** the present study,we describe the development of a novel nanofiber-forming elastin-like polypeptide(ELP)with an arginine-glutamic acid-aspartic acid-valine(REDV)*** biological characteristics of the REDV-modified ELP nanofibers relevant to applications in vascular grafting were compared to ELP without ligands for integrin,ELP with arginine-glycine-aspartic acid(RGD)sequence,collagen and cell culture *** them,REDV-modified ELP nanofibers met the preferred biological properties for vascular graft materials,i.e.(i)inhibition of platelet adhesion and activation,(ii)endothelial cell adhesion and proliferation and(iii)maintenance of smooth muscle cells in a contractile phenotype to prevent cell *** results indicate that REDV-modified ELP nanofibers represent promising candidates for the further development of small-diameter vascular grafts.

关键词： elastin-like polypeptide nanofiber platelet endothelial cell smooth muscle cell