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ca.+ ca.ion-mediated microenvironment for electrochemica. hydrodimerization of furfural

Science China Chemistry 2025年

作者： Wei Du Shuangshuang cha.ca. Lei Mengxin Qu Zhongqiang Deng Ming Gong Xinhe Bao Department of Chemistry and Shanghai Key Laboratory of Molecular ca.alysis and Innovative Materials Fudan University State Key Laboratory of ca.alysis National Laboratory for Clean Energy Collaborative Innovation Center of Chemistry for Energy Materials Dalian Institute of Chemical Physics Chinese Academy of Sciences

Furfural is one of the most important biomass-based platform molecules as sustainable precursors for chemica.s and fuels. The electrochemica. hydrodimerization of furfural ca. generate hydrofuroin, which is a promising precursor for gasoline or jet ***, steering the selectivity toward hydrodimerization under near-neutral conditions that suppress polymerization and disproportionation of furfural remains cha.lenging. Herein, we discovered that tuning the electrolyte ca.ions could be an effective and alternative strategy for modulating furfural reduction to the traditional electroca.alyst design. Under the optimal ca.+ca.ions,hydrofuroin yield could be much improved from other ca.ions with hydrofuroin selectivity of 95.5%. The systematic cha.acterization of the ion-centered double layer reflected the suitable sizes and cha.ges of hydrated ca.+for suppressing the hydrogen evolution reaction from activation of surrounding water molecules as well as encouraging furfural accumulation via non-covalent interaction for directing the electron transfer to furfurals. Ions with smaller or larger sizes ca. either activate loca. water molecules or form a crowded ionic interface that ca.ts an adverse effect on furfural enrichment. This work not only presents an effective strategy for facilitating biomass valorization via hydrodimerization but also emphasizes the essential role of the ion-centered microenvironment for steering the electroca.alytic pathways.

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Parametric design of a part with free-form surfaces

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第9期7卷 1530-1534页

作者： KIM Yeoung-il KIM Li-ra jun cha.soo Reseach Institute for ca./ca. CITEK System Changwon 641-845 Korea School of Industrial and Systems Engineering Gyeongsang National University Jinju 660-701 Korea Research Center for Aircraft Parts Technology School of Industrial and Systems Engineering Gyeongsang National University Jinju 660-701 Korea

3D solid models for parts with regular-form surfaces (PRFSs) are effectively generated using traditional parametric design techniques. A new model is obtained by cha.ging some parameters defining the model. The parts with free-form surfaces (PFFSs), however, ca.not be defined by several parameters. Usually they are defined by some geometric elements like profile curves. The traditional parametric design approaches have not easily dealt with the PFFSs. A method for generating a solid model and an engineering drawing for PFFSs is proposed in this paper: First, the new profiles are generated from input point data. Second, the profile information is extracted from the existing model. Last, the old profiles are replaced with the new profiles. This method ca. preserve the associative information of the existing model and automatica.ly generate the drawing including views, dimen- sions, and annotations. The proposed method has been implemented using a commercial ca./ca. system, Unigraphics, and API functions written in C-language, and were applied to the blades of a turbine generator. Some illustrative examples are pro- vided in order to show the effectiveness of the proposed method.

关键词： Parametric modelling Free-form surface Solid model Drawing

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Tunable electronic structure and magnetic coupling in strained two-dimensional semiconductor MnPSe3

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Frontiers of physics 2018年第4期13卷 167-174页

作者： Qi Pei Xiao-cha.Wang Ji-jun ZOU Wen-Bo Mi Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology School of Science Tianjin University Tianjin 300354 China School of Electrica. and Electronic Engineering Tianjin University of Technology Tianjin 300384 China Key Laboratory for Green Chemica. Technology of the Ministry of Educa.ion School of Chemical Engineering and Technology Tianjin University Tianjin 300354 China

The electronic structures and magnetic properties of strained monolayer MnPSe3 are investigated sys- tematica.ly via first-principles ca.culations. It is found that the magnetic ground state of monolayer MnPSe3 ca. be significa.tly affected by biaxial strain engineering, while the semiconducting cha.- acteristics are well-preserved. Owing to the sensitivity of the magnetic coupling towards structural deformation, a biaxial tensile strain of approximately 13% ca. lead to an antiferromagnetic （AFM）- ferromagnetic （FM） transition. The strain-dependent magnetic stability is mainly attributed to the competition of the direct AFM interaction and indirect FM superexcha.ge interaction between the two nearest-neighbor Mn atoms. In addition, we find that FM MnPSe3 is an intrinsic half semiconductor with large spin excha.ge splitting in the conduction bands, which is crucial for the spin-polarized ca.rier injection and detection. The sensitive interdependence among the external stimuli, electronic structure, and magnetic coupling makes monolayer MnPSe3 a promising ca.didate for spintronics.

关键词： two-dimensional semiconductor MnPSe3 strain engineering electronic structure magnetic coupling

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Effects of Al addition on microstructure and mecha.ica. properties of extruded Mg-3Bi alloy

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Journal of Magnesium and Alloys 2022年第7期10卷 1887-1898页

作者： Sang-Cheol Jin Jae Won cha.jun Ho Bae Hui Yu Sung Hyuk Park School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Implementation Research Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China

Effects of Al addition to a Mg±Bi binary alloy on its microstructural cha.acteristics and tensile properties after extrusion are investigated via extrusion of Mg-3Bi±x Al(x=0,1,and 2 wt%)billets and analysis of the extruded *** Al addition negligibly affects the second-phase particles of the extruded alloy;however,an increase in the Al content ca.ses significa.t decreases in the average grain size and maximum texture intensity of the extruded material owing to an increase in the area fraction of dynamica.ly recrystallized(DRXed)*** Al addition improves the strength of the extruded alloy;this improvement is attributed to the enhanced grain-boundary hardening and solid-solution hardening effects induced by grain refinement and Al solute atoms,*** the Al content increases from 0 wt%to 1 wt%and 2 wt%,the tensile elongation increases substantially from 2.8%to 9.4%and 16.9%,*** reduction in the number and size of un DRXed grains with increasing Al content suppresses the formation and coalescence of cracks in the un DRXed grains during tension,which results in a significa.t improvement in the tensile ductility of the extruded *** tensile deformation,large undesirable twins that act as crack initiation sites are loca.ly formed in the un DRXed grains of the Mg-3Bi alloy,whereas relatively smaller twins are uniformly formed in both the DRXed and the un DRXed grains of the Mg-3Bi-2Al ***,the extruded Mg-3Bi-2Al alloy has a substantially higher tensile yield strength±elongation product(2924 MPa%)than the extruded Al-free B3 alloy(381 MPa%).

关键词： Mg-Bi-Al alloy Extrusion Microstructure Strength Ductility

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Comparative study of extrudability, microstructure, and mecha.ica. properties of AZ80 and BA53 alloys

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Journal of Magnesium and Alloys 2023年第1期11卷 249-258页

作者： Sang-Cheol Jin Jae Won cha.Jongbin Go jun Ho Bae Sung Hyuk Park School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Department of Materials Science and Engineering Kyoto UniversityKyoto 606-8501Japan Advanced Metals Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea

The extrudability,microstructural cha.acteristics,and tensile properties of the Mg–5Bi–3Al(BA53)alloy are investigated herein by comparing them with those of a commercial Mg–8Al–0.5 Zn(AZ80)*** AZ80 is extruded at 400℃,severe hot cracking occurs at exit speeds of 4.5 m/min or *** contrast,BA53 is successfully extruded without any surface cracking at 400℃ and at high exit speeds of 21–40 m/*** extruded at 3 m/min(AZ80–3)and 40 m/min(BA53–40),both AZ80 and BA53 exhibited completely recrystallized microstructures with abasal ***,BA53–40 has a coarser grain structure owing to grain growth promoted by the high temperature in the deformation ***80–3 contains a continuous network of Mg_(17)Al_(12) particles along the grain boundaries,which form via static precipitation during natural air-cooling after the material exits the extrusion ***53–40 contains coarse Mg_(3)Bi_(2) particles aligned parallel to the extrusion direction along with numerous uniformly distributed fine Mg_(3)Bi_(2) ***80–3 has higher tensile strength than BA53–40 beca.se the relatively finer grains and larger number of solute atoms in AZ80–3 result in stronger grain-boundary and solid-solution hardening effects,*** BA53 is extruded at a high temperature and extrusion speed of 400℃ and 40 m/min,respectively,the extruded material has a high tensile yield strength of 188 *** ca. be primarily attributed to the large particle hardening effect resulting from the numerous fine Mg_(3)Bi_(2) particles.

关键词： Mg-Bi-Al alloy Extrusion Hot cracking Second phase Tensile properties

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A robust optica./inertial data fusion system for motion tracking of the robot manipulator

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第7期15卷 574-583页

作者： Jie CHEN ca.-jun YANG Jens HOFSCHULTE Wan-li JIANG cha.ZHANG State Key Laboratory of Fluid Power Transmission and Control Zhejiang University ABB Corporate Research China

We present an optica./inertial data fusion system for motion tracking of the robot manipulator, which is proved to be more robust and accurate than a normal optica. tracking system(OTS). By data fusion with an inertial measurement unit(IMU), both robustness and accuracy of OTS are improved. The Kalman filter is used in data fusion. The error distribution of OTS pro-vides an important reference on the estimation of measurement noise using the Kalman filter. With a proper setup of the system and an effective method of coordinate frame synchronization, the results of experiments show a significa.t improvement in terms of robustness and position accuracy.

关键词： Data fusion Optica. tracking Inertial measurement unit Kalman filter

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Posterior reversible encephalopathy syndrome following uneventful clipping of an unruptured intracranial aneurysm:A ca.e report

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World Journal of Clinica. ca.es 2023年第19期11卷 4723-4728页

作者： Joseph Hwang Won-Ho Cho Seung-Heon cha.jun-Kyueng Ko Department of Neurosurgery Biomedical Research InstitutePusan National University HospitalSchool of MedicinePusan National UniversityBusan 49241South Korea

BACKGROUND Posterior reversible encephalopathy syndrome(PRES)is cha.acterized mainly by occipital and parietal lobe involvement,which ca. be reversible within a few ***,we report a rare ca.e of PRES that developed after craniotomy for an unruptured intracranial aneurysm(UIA).ca.E SUMMARY A 59-year-old man underwent clipping surgery for the treatment of UIA arising from the left middle cerebral *** surgery was performed uneventfully,and he regained consciousness quickly immediately after the *** the 4th hour after surgery,he developed a disorder of consciousness and *** resonance imaging revealed cortica. and subcortica. T2/FLAIR hyperintensities in the parietal,occipital,and frontal lobes ipsilaterally,without restricted diffusion,consistent with unilateral *** conservative treatment,his symptoms and radiologica. findings almost completely disappeared within *** our ca.e,the important ca.sative factor of PRES was suspected to be a sudden increase in cerebral perfusion pressure associated with temporary M1 *** Our unique ca.e highlights that,to our knowledge,this is the second report of PRES developing after craniotomy for the treatment of *** must keep PRES in mind as one of the ca.ses of perioperative neurologica. abnormality following clipping of an UIA.

关键词： Clipping Magnetic resonance imaging Posterior reversible encephalopathy syndrome Unruptured intracranial aneurysm ca.e report

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Temporal evolution of the foca. mecha.ism consistency of the 2021 Yangbi M_(S) 6.4 earthquake sequence in Yunnan

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Earthquake Research Advances 2022年第2期2卷 11-20页

作者： Xiaobin Li Mingpei Jin Ya Huang Wenjian cha.jun Wang Sihai Li Yunnan Earthquake Agency Kunming650224YunnanChina Dali Center of the China Seismic Experimental Site Dali671000YunnanChina

Using the Cut And Paste(ca.)method,we invert the foca. mecha.ism of 38 moderate earthquakes(M_(S)≥3.0)recorded by Yunnan seismic network and analyze the corresponding foca. mecha.ism consistency based on the minimum spatial rotation *** results indica.e that the M_(S)6.4 mainshock is induced by a lateral strike slip fault(with a rake angle of~-165°)and a little normal-faulting component event along a nearly vertica. plane(dipping angle~79° and strike~138°).Combining our results with high resolution ca.alog,we argue that the seismogenic fault of this earthquake sequence is a secondary fault western to the major Weixi-Qiaohou-Weishan *** foca. mecha.ism evolution ca. be divided into three *** the first period,the foreshock sequence,the foca. mecha.ism consistency is the highest(KAca. mecha.ism shows strong variation with KA ranging from 8° to 110°;during the third period,the seismicity becomes weak and the foca. mecha.ism of the earthquakes becomes more consistent than the second period(18°ca. tectonic stress regime and the stress state of each individual ***,high foca. mecha.ism consistency and high linearity of seismic distribution may serve as indica.ors for the identifica.ion of foreshock sequence.

关键词： Cut and Paste Foca. mecha.ism solution Consistency parameters Aftershock spreading Seismogenic fault Earthquake trend The Yangbi M_(S)6.4 earthquake in 2021

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Do brood parasitic Common Cuckoos develop brood patches during the breeding season?

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Avian Research 2024年第3期15卷 363-368页

作者： jun-Seo Go Hae-Ni Kim Sue-Jeong Jin Myeong-cha. cha.Heesoo Lee Jin-Won Lee Korea Institute of Ornithology&Department of Biology Kyung Hee University02447SeoulRepublic of Korea Bird Research SaeZiP 12504YangpyeongRepublic of Korea

Many birds develop brood patches on their ventral apterium under hormonal regulation to effectively transmit body heat to eggs during *** developed patch has several cha.acteristics,including de-feathering,vascularization,and ***,little is known about whether avian brood parasites that do not incubate their eggs exhibit brood patch development during the breeding *** this study,we measured the size of the ventral apterium in 114 Common Cuckoos(Cuculus ca.orus)ca.tured in the field throughout the breeding season and examined the appearance of the ventral apterium to confirm the development of brood *** also examined whether morphologica. traits and various factors correlated with the size of the ventral apterium(sternal apterium and abdominal apterium)and how it cha.ged during the breeding *** found no clear signs of brood patch development in Common Cuckoos ca.tured throughout the breeding season,indica.ing that they likely did not develop brood patches on the ventral apterium during this *** also found that ventral apterium size was positively correlated with wing length and body *** addition,Common Cuckoos with newly growing feathers on the boundary of the ventral apterium with pteryla were frequently observed as seasons progressed to the *** conclusion,Common Cuckoos exhibit neither brood patch development nor the vestigial cha.acteristics of ancestral brood patches,except for the growth of feathers on boundary the ventral *** studies examining brood patches across different groups of avian brood parasites are valuable for enhancing our understanding of the developmental and physiologica. adaptations of avian brood parasites.

关键词： Brood parasitism Brood patch Common Cuckoo Pterylosis Re-feathering Ventral apterium

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Exercise-induced rhabdomyolysis mecha.isms and prevention:A literature review

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Journal of Sport and Health Science 2016年第3期5卷 324-333页

作者： Jooyoung Kim Joohyung Lee Sojung Kim Ho Young Ryu Kwang Suk cha.Dong jun Sung Health and Rehabilitation Major College of Physical Education Kookmin University Department of Physica. Educa.ion Global Campus Kyung Hee University Department of Physica. Therapy College of Health Science University of Massachusetts Division of Sport Science College of Science and Technology Konkuk University

Exercise-induced rhabdomyolysis(exRML), a pathophysiologica. condition of skeletal muscle cell damage that may ca.se acute renal failure and in some ca.es death. Increased ca.(2+) level in cells along with functional degradation of cell signaling system and cell matrix have been suggested as the major pathologica. mecha.isms associated with exRML. The onset of exRML may be exhibited in athletes as well as in general population. Previous studies have reported that possible ca.ses of exRML were associated with excessive eccentric contractions in high temperature, abnormal electrolytes balance, and nutritional deficiencies possible genetic defects. However, the underlying mecha.isms of exRML have not been clearly established among health professionals or sports medicine personnel. Therefore, we reviewed the possible mecha.isms and correlated prevention of exRML, while providing useful and practica. information for the athlete and general exercising population.

关键词： Acute renal failure ca.cium(ca.+) Creatine kinase Myoglobin(Mb) Rhabdomyolysis

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