检索结果-南通市图书馆

Machine learning super-resolution of laboratory CT images in all-solid-state batteries using synchrotron radiation CT as training data

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy and AI 2023年第4期14卷 612-619页

作者： M.Kodama A.takeuchi M.Uesugi S.Hirai Tokyo Institute of Technology 2-12-1 OokayamaMeguro-kuTokyo 152-8550Japan Japan Synchrotron Radiation Research Institute(JASRI/SPring-8) 1-1-1 KoutoSayoHyogo 679-5198Japan

High-performance all-solid-state lithium-ion batteries require observation,control,and optimization of the electrode structure.X-ray computational tomography(CT)is an effective nondestructive method for observing the electrode structure in three ***,the limited availability of synchrotron radiation CT,which offers high-resolution imaging with a high signal-to-noise ratio,makes it difficult to conduct experiments and restricts the use of X-ray CT in battery ***,laboratory CT systems are widely available,but they use X-rays emitted from a metal target,resulting in lower image quality and resolution compared with synchrotron radiation *** study explores a method for achieving comparable resolution in laboratory CT images of all-solid-state batteries to that of synchrotron radiation *** method involves using the synchrotron radiation CT images as training data for machine learning *** results demonstrate that,by employing an appropriate machine learning algorithm and activation function,along with a sufficiently deep network,the image quality of laboratory CT becomes equivalent to that of synchrotron radiation CT.

关键词： All-solid-state lithium-ion battery X-ray CT Laboratory CT Synchrotron radiation CT Super-resolution Machine learning

Heavy Metal-Polluted Aerosols Collected at a Rural Site,Northwest China

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 Earth Science 2017年第3期28卷 535-544页

作者： Xiaoyu Zhang Zhongqin Li Nozomu takeuchi Feiteng Wang Shengjie Wang Xiaoni You Ping Zhou State Key Laboratory of Cryospheric Sciences Cold and Arid Regions Environment and Engineering Research InstituteTianshan Glaciological StationChinese Academy of SciencesLanzhou 730000China Department of Earth Sciences Graduate School of ScieneeChiba UniversityChiba 263-8522Japan College of Geography and Environment Science Northwest Normal UniversityLanzhou 730000China Tianshui Normal University Tianshui 741001China

Daily samples of aerosol（n=27） were collected from September 21 st to October 4th, 2013 in Fukang（44.17°N, 88.45°E, 475 m a.s.l.）, Xinjiang, Northwest China. The enrichment factors（EFc） of selected 49 elements showed that the aerosols had extremely high concentrations of heavy metals, probably indicating their anthropogenic origins. Morphology of individual aerosol particles was determined by scanning electron microscopy and energy-dispersive X-ray microanalysis. Based on morphology and elemental composition, the particles were clustered into three dominant types：（Ⅰ） crustal originated particles： Si/Al-rich particles（36%） and Si/Fe-rich particles（24%）;（Ⅱ） mixed source particles; and（Ⅲ） pollution derived particles： Pb-rich particles（10%）. The backward trajectories were calculated using the HYSPLIT model, and the results indicated the different anthropogenic sources for heavy metals in Fukang aerosols. Air mass from north was identified as the most polluted source when compared to south and west.

关键词： heavy metal pollution aerosols Central Asia

Phenology and classification of abandoned agricultural land based on ALOS-1 and 2 PALSAR multi-temporal measurements

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

International Journal of Digital Earth 2017年第2期10卷 155-174页

作者： Noryusdiana Mohamad Yusoff Farrah Melissa Muharam Wataru takeuchi Soni Darmawan Muhamad Hafiz Abd Razak Department of Agriculture Technology Faculty of AgricultureUniversiti Putra MalaysiaSerdangMalaysia Malaysian Remote Sensing Agency Kuala LumpurMalaysia Institute of Plantation Studies Universiti Putra MalaysiaSelangorMalaysia Institute of Industrial Science University of TokyoMeguro-kuJapan Institut Teknologi Nasional(ITENAS) West JavaIndonesia FELCRA Berhad Kuala LumpurMalaysia

Agricultural crop abandonment negatively impacts local economy and environment since land,as a resource for agriculture,is not optimally *** take necessary actions to rehabilitate abandoned agricultural lands,the identification of the spatial distribution of these lands must be *** optical images had previously illustrated potentials in the identification of agricultural land abandonment,tropical areas often suffer cloud coverage problem that limits the availability of the ***,this study was conducted to investigate the potential of ALOS-1 and 2(Advanced Land Observing Satellite-1 and 2)PALSAR(Phased Array L-band Synthetic Aperture Radar)images for the identification and classification of abandoned agricultural crop areas,namely paddy,rubber and oil palm *** crop phenology for paddy and rubber was identified from ALOS-1 PALSAR;nonetheless,oil palm did not demonstrate any useful phenology for discriminating between the abandoned *** accuracy obtained for these abandoned lands of paddy,rubber and oil palm was 93.33%±0.06%,78%±2.32%and 63.33%±1.88%,*** study confirmed that the understanding of crop phenology in relation to image date selection is essential to obtain high accuracy for classifying abandoned and non-abandoned agricultural *** finding also portrayed that PALSAR offers a huge advantage for application of vegetation in tropical areas.

关键词： Classification land abandonment agriculture ALOS PALSAR synthetic aperture radar

Flight simulation from takeoff to yawing of eVTOL airplane with coaxial propellers by fluid-rigid body interaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Aerodynamics 2023年第1期5卷 29-43页

作者： Ritsuka Gomi Ayato Takii Masashi Yamakawa Shinichi Asao Seiichi takeuchi Momoha Nishimura Department of Mechanical Engineering Kyoto Institute of TechnologyKyotoJapan Department of Mechanical Engineering College of Industrial TechnologyHyogoJapan

In this study,we adopt a coupled fluid-rigid body simulation using the moving computational domain method and multi-axis sliding mesh method for the takeoff,hovering,and yawing flight of an electric vertical takeoff and landing aircraft(eVTOL).The aircraft model has four pairs of coaxial propellers,and the computational domain is divided into three domains to move the aircraft and eight propeller domains to rotate the *** a result,we clarify the behavior and aerodynamic force of the aircraft when the input values are determined by the automatic *** results in the flow field also show that the downwash spreads in a crisscross pattern on the ground,the wind reaches different ranges on the ground depending on the flight altitude,and that the coaxial propeller causes an asymmetry in the velocity field during ***-quently,we conclude that this method is effective for the flight simulation of an eVTOL.

关键词： Computational fluid dynamics Moving grid Coupled simulation Flying car eVTOL

Association of anastomotic leakage with long-term oncologic outcomes of patients with esophagogastric junction cancer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2022年第1期14卷 46-55页

作者： Masashi takeuchi Hirofumi Kawakubo Satoru Matsuda Shuhei Mayanagi Tomoyuki Irino Jun Okui Kazumasa Fukuda Rieko Nakamura Norihito Wada Hiroya takeuchi Yuko Kitagawa Department of Surgery Keio University School of MedicineTokyo 160-8582Japan Department of Preventive Medicine and Public Health Keio University School of MedicineTokyo 160-8582Japan Department of Surgery Hamamatsu University School of MedicineShizuoka 431-3192Japan

BACKGROUND Despite improvements in surgical procedures and peri-operative patients management,the postoperative complications in esophagogastric junction(EGJ)cancer remain high because of technical *** studies have indicated the negative influence of postoperative infectious complications on long-term survival after gastrointestinal ***,no study has shown the association between postoperative complications and long-term survival of patients with EGJ *** To elucidate influence of postoperative complications on the long-term outcomes of patients with EGJ *** A total of 122 patients who underwent surgery for EGJ cancer at the Keio University were included in this *** examined the association between complications and long-term oncologic *** In all patients,the 3-year overall survival(OS)rate was 71.9%,and the recurrencefree survival(RFS)rate was 67.5%.Compared with patients without anastomotic leakage,those with anastomotic leakage had poor median OS(8 mo vs not reached,P=0.028)and median RFS(5 mo vs not reached,P=0.055).Among patients with cervical anastomosis,there were not significant differences between patients with and without anastomotic ***,among patients who underwent intrathoracic anastomosis,patients with anastomotic leakage had significantly worse OS(P=0.002)and RFS(P=0.005).CONCLUSION Anastomotic leakage was significantly associated with long-term oncologic outcomes of patients with EGJ cancer,especially those who underwent intrathoracic *** anastomosis with subtotal esophagectomy may be an option for the patients who are at high risk for anastomotic leakage.

关键词： Esophagogastric junction cancer Complication Long-term outcome

PPARα activator irbesartan suppresses the proliferation of endometrial carcinoma cells via SREBP1 and ARID1A

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Oncology Research 2023年第3期31卷 239-253页

作者： YU LU TSUTOMU MIYAMOTO HODAKA takeuchi FUMI TSUNODA NAOKI TANAKA TANRI SHIOZAWA Department of Obstetrics and Gynecology School of MedicineShinshu UniversityMatsumoto390-8621Japan Department of Global Medical Research Promotion School of MedicineShinshu University GraduateMatsumotoNagano390-8621Japan International Relations Office School of MedicineShinshu UniversityMatsumotoNagano390-8621Japan Research Center for Social Systems Shinshu UniversityMatsumotoNagano390-8621Japan

Endometrial carcinoma(EMC)is associated with obesity;however,the underlying mechanisms have not yet been *** proliferator-activated receptor alpha(PPARα)is a nuclear receptor that is involved in lipid,glucose,and energy ***αreportedly functions as a tumor suppressor through its effects on lipid metabolism;however,the involvement of PPARαin the development of EMC remains *** present study demonstrated that the immunohistochemical expression of nuclear PPARαwas lower in EMC than in normal endometrial tissues,suggesting the tumor suppressive nature of PPARα.A treatment with the PPARαactivator,irbesartan,inhibited the EMC cell lines,Ishikawa and HEC1A,by down-regulating sterol regulatory element-binding protein 1(SREBP1)and fatty acid synthase(FAS)and up-regulating the tumor suppressor genes p21 and p27,antioxidant enzymes,and AT-rich interaction domain 1A(ARID1A).These results indicate the potential of the activation of PPARαas a novel therapeutic approach against EMC.

关键词： Peroxisome proliferator-activated receptor alpha Sterol regulatory element-binding protein 1 Antioxidant Migration

Clinical impact of chemotherapy to improve tumor microenvironment of pancreatic cancer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2016年第11期8卷 786-792页

作者： Takahiro Tsuchikawa Shintaro takeuchi Toru Nakamura Toshiaki Shichinohe Satoshi Hirano Department of Gastro-enterological Surgery Ⅱ Hokkaido University Graduate School of Medicine

A perioperative multimodal strategy including combination chemotherapy and radiotherapy, in addition to surgical resection, has been acknowledged to improve patient prognosis. However chemotherapy has not been actively applied as an immunomodulating modality because of concerns about various immunosuppressive effects. It has recently been shown that certain chemotherapeutic agents could modify tumor microenvironment and host immune responses through several underlying mechanisms such as immunogenic cell death, local T-cell infiltration and also the eradication of immune-suppressing regulatory cells such as regulatory T cells(Tregs) and myeloid-derived suppressor cells. With the better understanding of the cell components in the tumor microenvironment and the effect of chemotherapy to improve tumor microenvironment, it has been gradually clear that the chemotherapeutic agents is two-edged sword to have both immune promoting and suppressing effects. The cellular components of the tumor microenvironment include infiltrating T lymphocytes, dendritic cells, regulatory T cells, tumor associated macrophages, myeloid derived suppressor cells and cancer associated fibroblasts. Based on the better understanding of tumor microenvironment following chemotherapy, the treatment protocol could be modified as personalized medicine and the prognosis of pancreas cancer would be more improved utilizing multimodal chemotherapy. Here we review the recent advances of chemotherapy to improve tumor microenvironment of pancreatic cancer, introducing the unique feature of tumor microenvironment of pancreatic cancer, interaction between anti-cancer reagents and these constituting cells and future prospects.

关键词： Pancreas cancer Microenvironment Chemotherapy Immune cells Immunomodulation

Adhesion Force Measurements of Polymer Particles by Detachment Field Method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

仪器仪表学报 2004年第S3期 62-66页

作者： Masashi Nagayama ,Nobuyasu Sakurai,Tatsuaki Wada,Manabu takeuchi Department of Electrical and Electronic Engineering Ibaraki University Hitachi 316-8511 Japan Department of Electrical and Electronic Engineering Ibaraki University Hitachi 316-8511 Japan Department of Electrical and Electronic Engineering Ibaraki University Hitachi 316-8511 Japan Department of Electrical and Electronic Engineering Ibaraki University Hitachi 316-8511 Japan

The adhesion force distributions of polymer particles to aluminum substrates were measured by the detachment field method. Polymer particles with conducting surface treatment were used for the measurements. Further the conventional detachment field method was modified to be applicable to the adhesion force measurements of a single particle. The adhesion force of the polymer particles increased with an increase in relative humidity. The surface roughness of the substrate influenced the adhesion forces of particles significantly. The influence of the CF4 plasma treatment of the polymer particles and thin layer coating of the substrate surface on the adhesion forces of the polymer particles was also studied, and factors affecting adhesion forces of polymer particles are discussed.

关键词： Toner Adhesion force van der Waals force

In-silico clearing approach for deep refractive index tomography by partial reconstruction and wave-backpropagation

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2023年第5期12卷 877-893页

作者： Osamu Yasuhiko Kozo takeuchi Central Research Laboratory Hamamatsu Photonics K.K5000 HirakuchiHamakita-kuHamamatsu 434-8601 ShizuokaJapan

Refractive index(RI)is considered to be a fundamental physical and biophysical parameter in biological imaging,as it governs light-matter interactions and light propagation while reflecting cellular *** tomography enables volumetric visualization of RI distribution,allowing biologically relevant analysis of a ***,multiple scattering(MS)and sample-induced aberration(SIA)caused by the inhomogeneity in RI distribution of a thick sample make its visualization *** paper proposes a deep RI tomographic approach to overcome MS and SIA and allow the enhanced reconstruction of thick samples compared to that enabled by conventional linear-model-based RI *** proposed approach consists of partial RI reconstruction using multiple holograms acquired with angular diversity and their backpropagation using the reconstructed partial RI map,which unambiguously reconstructs the next partial *** this operation efficiently reconstructs the entire RI tomogram while suppressing MS and *** visualized a multicellular spheroid of diameter 140μm within minutes of reconstruction,thereby demonstrating the enhanced deep visualization capability and computational efficiency of the proposed method compared to those of conventional RI ***,we quantified the high-RI structures and morphological changes inside multicellular spheroids,indicating that the proposed method can retrieve biologically relevant information from the RI *** from the excellent biological interpretability of RI distributions,the label-free deep visualization capability of the proposed method facilitates a noninvasive understanding of the architecture and time-course morphological changes of thick multicellular specimens.

关键词： properties refractive overcome