检索结果-南通市图书馆

Side-Chain Type Ferrocene Macrocycles

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Precision Chemistry 2024年第4期2卷 143-150页

作者： Bin Lan Jindong Xu Lingyun Zhu Xinyu Chen Hideya Kono Peihan Wang Xin Zuo Jianfeng Yan Akiko Yagi Yongshen Zheng Songhua Chen Yaofeng Yuan kenichiro Itami Yuanming Li Key Laboratory of Molecule Synthesis and Function Discovery(Fujian Province University) College of ChemistryFuzhou UniversityFuzhou 350108China Institute of Transformative Bio-Molecules(WPI-ITbM) Nagoya UniversityNagoya 464-8602Japan School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China Institute of Transformative Bio-Molecules(WPIITbM) Nagoya UniversityNagoya 464-8602Japan College of Chemistry and Material Science Longyan UniversityLongyan 364012China

A class of side-chain type ferrocene macrocycles with a radially conjugated system is introduced in this *** stereo configurations of these ferrocene rings were determined through single-crystal X-ray diffraction ***,in the solid state,the ferrocene rings exhibit a distinctive herringbone stacking pattern imposed by a ferrocene-to-ring host−guest *** UV−vis absorption spectroscopy,electrochemical measurements,and theoretical calculations,valuable insights into the electronic properties of these rings were *** addition,the single crystal of macrocycle A_(2)B demonstrates a second-order nonlinear optical *** a class of organometallic nanorings,this work holds great potential for further exploration in the fields of organometallic chemistry,molecular electronics,and host−guest chemistry.

关键词： Ferrocene Conjugated Macrocycles Organometallic Macrocycles Second-Order Nonlinear Optical Nanoring

Zircon within chromitite requires revision of the tectonic history of the Eoarchean Itsaq Gneiss complex,Greenland

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geoscience Frontiers 2023年第6期14卷 273-285页

作者： Hikaru sawada Tomoaki Morishita Adrien Vezinet Richard Stern kenichiro Tani Ikuya Nishio Kanta Takahashi D.Graham Pearson Kristoffer Szilas Department of Earth System Science University of ToyamaToyamaJapan X-Star Japan Agency for Marine-Earth Science and Technology(JAMSTEC)KanagawaJapan Faculty of Geosciences and Civil Engineering Kanazawa UniversityKanazawaJapan Lamont-Doherty Earth Observatory Columbia UniversityPalisadesUSA Volcanoes and Earth’s Interior Research Center JAMSTECKanagawaJapan Department of Earth and Atmospheric Sciences University of AlbertaEdmontonCanada Canadian Centre for Isotopic Microanalysis University of AlbertaEdmontonCanada National Museum of Nature and Science TsukubaJapan Department of Geosciences and Natural Resource Management University of CopenhagenCopenhagenDenmark

The Ujaragssuit Nunat layered(UNL)unit in the Itsaq Gneiss Complex,west Greenland,has been consid-ered to contain one of the oldest chromitites on Earth based on~ca.4.1 Ga Hadean whole rock Pt-Os model ages and ca.3.81 Ga zircon U-Pb age of the surrounding *** study obtained zircon from the chromitite within this unit as well as granitoid sheets that intruded into the UNL ***-situ U-Pb-Hf-O isotope measurements were made on the *** from both the chromitite and the intrusive granitoids show concordant U-Pb ages of ca.2.97-2.95 *** contrast,Hf and 0 isotopic anal-yses indicate that zircons in the chromitites have a different origin from those in the intrusive *** from granitoids yielded Th/U ratios higher than 0.2,initial Hf isotope ratios of 0.2805-0.2807(i.e,initial:Hf value of-11 to-5),andδ^(18)O values of mostly 6.0‰-7.0‰,which are typical for felsic igneous rocks in Archean continental *** least altered zircons from a chromitite exhibited initial Hf isotope ratios of 0.28078-0.28084(i.e.,initial:Hf value of-1.1 to-0.4),close the chondritic value at ca.3.0 Ga and the depleted mantle at ca.3.2 *** zircons also haveδ^(18)O values of 4.2‰6.1‰which correspond to typical mantle *** other chromitite zircons yielded Th/U ratios lower than 0.1,and Hf and 0 isotopic compositions ranging between the least altered zircons and the intrusive granitoid *** results indicate that the zircons in the chromitites crystallized before or during the 2.97-2.95 Ga granitoid intrusion and most of the zircons were altered by subsequent ***,the present results suggest that zircons in the chromitites originally had depleted Hf iso-topic compositions at ca.3.2-3.0 *** can be explained by two different models of the evolution of the UNL *** is that if the UNL unit was formed at>3.81 Ga as previously thought,with the zircons in the chromitites subsequently being precipitated by ca.3.2-2.95 G

关键词： Archean Itsaq gneiss complex Ultramafic rock Metasomatism

Minimally invasive surgeries for insertional Achilles tendinopathy:A commentary review

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 Orthopedics 2023年第6期14卷 369-378页

作者： kenichiro Nakajima Center for Foot and Ankle Surgery Department of Orthopedic SurgeryYashioCentral General HospitalYashio-shi 340-0814SaitamaJapan

Studies of minimally invasive surgery for insertional Achilles tendinopathy are *** establish this surgery,the following techniques must be minimally invasive:Exostosis resection at the Achilles tendon insertion,debridement of degenerated Achilles tendon,reattachment using anchors or augmentation using flexor hallucis longus(FHL)tendon transfer,and excision of the posterosuperior calcaneal *** on these four perspectives were reviewed to establish minimally invasive surgery for insertional Achilles *** for exostosis resection were demonstrated in one case study,where blunt dissection around the exostosis was performed,and the exostosis was resected using an abrasion burr under fluoroscopic *** for debridement of degenerated Achilles tendon were demonstrated in the same case study,where the space left after resection of the exostosis was used as an endoscopic working space,and the degenerated Achilles tendon and intra-tendinous calcification were debrided *** tendon reattachment techniques using suture anchors have been demonstrated in several ***,there are no studies on FHL tendon transfer techniques for Achilles tendon *** contrast,endoscopic posterosuperior calcaneal prominence resection is already ***,studies on ultrasound-guided surgeries and percutaneous dorsal wedge calcaneal osteotomy as minimally invasive surgery were reviewed.

关键词： Achilles tendon Endoscopy Fluoroscopy Osteotomy Ultrasonography Tendinopathy Surgery

Stochastic model predictive braking control for heavy-duty commercial vehicles during uncertain brake pressure and road profile conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Control Theory and Technology 2022年第2期20卷 248-262页

作者： Ryota Nakahara Kazuma Sekiguchi kenichiro Nonaka Masahiro Takasugi Hiroki Hasebe Kenichi Matsubara Graduate School of Integrative Science and Engineering Tokyo City UniversityTamazutsumiSetagaya-kuTokyo 1588557Japan Nabtesco Automotive Co. Ltd.HirakawachoChiyoda-kuTokyo 1020093Japan

When heavy-duty commercial vehicles(HDCVs)must engage in emergency braking,uncertain conditions such as the brake pressure and road profile variations will inevitably affect braking *** minimize these uncertainties,we propose a combined longitudinal and lateral controller method based on stochastic model predictive control(SMPC)that is achieved via Chebyshev–Cantelli *** our method,SMPC calculates braking control inputs based on a finite time prediction that is achieved by solving stochastic programming elements,including chance *** accomplish this,SMPC explicitly describes the probabilistic uncertainties to be used when designing a robust control *** main contribution of this paper is the proposal of a braking control formulation that is robust against probabilistic friction circle uncertainty *** specifically,the use of Chebyshev–Cantelli inequality suppresses road profile influences,which have characteristics that are different from the Gaussian distribution,thereby improving both braking robustness and control performance against statistical ***,since the Kalman filtering(KF)algorithm is used to obtain the expectation and covariance used for calculating deterministic transformed chance constraints,the SMPC is reformulated as a KF embedded deterministic ***,the effectiveness of our proposed method is verified via a MATLAB/Simulink and TruckSim co-simulation.

关键词： Heavy-duty commercial vehicle Brake system Stochastic model predictive control Road profile

Carbon Nanobelts:Brief History and Perspective

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Precision Chemistry 2023年第9期1卷 516-523页

作者： Daiki Imoto Akiko Yagi kenichiro Itami Department of Chemistry Graduate School of ScienceNagoya UniversityNagoya 464-8602Japan Institute of Transformative Bio-Molecules(WPI-ITbM) Nagoya UniversityNagoya 464-8602Japan

Carbon nanotubes(CNTs)are an emerging nanomaterial because of their outstanding performance in various *** recent years,the segment molecules of CNTs,referred to as carbon nanorings(CNRs)or carbon nanobelts(CNBs),have gained attention for their unique structures and properties,as well as their potential as seed molecules for the precise synthesis of *** are rigid and thick segments of CNTs whose synthesis has been addressed by scientists fascinated by the uniqueness of CNBs long before the discovery of *** 60 years of efforts by synthetic chemists all over the world,the synthesis of the first CNB,(6,6)CNB,was achieved by our group in *** this milestone,diverse types of nanobelts have been synthesized through various synthetic routes,thereby demonstrating their photophysical,magnetic,and redox properties derived from rigid belt *** applications of CNBs have also been introduced *** formation of the host−guest complex,transformation to three-dimensional molecules,and measurement of conductivity have been reported for *** paper summarizes the brief history and perspective of *** synthetic campaigns and aggressive application of CNBs would create novel and groundbreaking scenes in materials science.

关键词： carbon nanobelt carbon nanoring carbon nanotube cycloparaphenylene aromatic compounds organic synthesis

Practical BRDF reconstruction using reliable geometric regions from multi-view stereo

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computational Visual Media 2019年第4期5卷 325-336页

作者： Taishi Ono Hiroyuki Kubo kenichiro Tanaka Takuya Funatomi Yasuhiro Mukaigawa Nara Institute of Science and Technology IkomaNara 630-0192Japan

In this paper,we present a practical method for reconstructing the bidirectional reflectance distribution function(BRDF)from multiple images of a real object composed of a homogeneous *** key idea is that the BRDF can be sampled after geometry estimation using multi-view stereo(MVS)*** contribution is selection of reliable samples of lighting,surface normal,and viewing directions for robustness against estimation errors of *** method is quantitatively evaluated using synthesized images and its effectiveness is shown via real-world experiments.

关键词： BRDF reconstruction multi-view stereo(MVS) photogrammetry rendering

Visualization of flashback in a premixed burner with swirling flow

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

Science China(Technological Sciences) 2010年第1期53卷 40-45页

作者： Satoshi TANIMURA Masaharu KOMIYAMA kenichiro TAKEISHI Yuji IWASAKI Kiyonobu NAKAYAMA Mitsubishi Heavy Industries Ltd.2-1-1ShinhamaArai-choTakasagoHyogo676-0871Japan Department of Mechanical Engineering Osaka University2-1YamadaokaSuitaOsaka565-0871Japan

In this study,the measurement object is a flame propagating in a premixed burner with swirling flow in order to investigate unsteady flame behavior in a gas turbine *** flashback,the flame propagating upstream was visualized with a high-speed ***,we established the technique to measure the instantaneous flow fields of unburned fuel-air mixture in a swirling premixed burner using particle image velocimetry(PIV).As a result,the characteristics of flame behavior propagating upstream were *** it was found that a low velocity region existed in the vicinity of the flame *** relationship between low velocity region and flame behavior was discussed in detail.

关键词： gas turbine lean premixed combustion flashback particle image velocimetry

Global standardization of laparoscopic liver resection and challenges for the future

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

Hepatobiliary Surgery and Nutrition 2019年第4期8卷 386-388页

作者： kenichiro Araki Norifumi Harimoto Ken Shirabe Division of Hepatobiliary and Pancreatic Surgery Department of General Surgical Science Gunma University Graduate School of Medicine Gunma Japan

Hepatobiliary Surgery and Nutrition recently published a review by X Cai that describes the current status and future of laparoscopic liver resection (LLR) in China. The advent of LLR has led to significant changes in the field of liver surgery, with numerous reports outlining how this procedure offers a better, less invasive approach for the treatment of liver disease. Two international consensus conferences regarding LLR—held in 2008 (Louisville, USA) and 2014 (Morioka, Japan)—highlighted the efficacy and safety of LLR, and discussed the surgical indications, technique, standardizations, and precautions that should be considered when performing LLR (1,2). Delegates deliberated whether open liver resection (OLR) should remain the current standard procedure for liver disease, and the importance of LLR within this arena. There was agreement that minor LLR offers sufficient safety and benefit to be considered standard practice, but major resection requires further investigation. The most recent guidelines from the European meeting on LLR, held in 2017 in Southampton, UK (3), integrate the available evidence and expert knowledge on LLR, taking into consideration relevant stakeholders' opinions and complying with international methodology standards across five domains (indications, patients and complex diseases, procedures, techniques, and implementation). The guidelines emphasize the importance of a team-oriented approach and the need to recruit experts in OLR and laparoscopic surgery within a specialist center.

关键词： resection Surgery standardization

To develop a quantitative method for predicting shrinkage porosity in squeeze casting

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Foundry 2009年第1期6卷 53-56页

作者： Shaomin Li kenichiro Mine Shinji Sanakanishi Koichi Anzai Ahresty Corporation Toyohashi Japan Tohoku University Sendai Japan

In order to secure high strength and high elongation of suspension parts,it is critical to predict shrinkage porosity quantitatively.A new simulation method for quantitative prediction of shrinkage porosity when replenishing molten metal has been proposed for squeeze casting *** examine the accuracy of the calculation model,the proposed method was applied to a plate model.

关键词：定量预测方法挤压铸造缩松高伸长率铸造工艺模拟方法计算模型高强度