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Novel 1,2,3-triazole-based compounds： Iodo effect on their gelation behavior and cation response

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Frontiers of Chemical Science and Engineering 2018年第2期12卷 252-261页

作者： Yaodong Huang Shuxue Liu Zhuofeng Xie Zipei Sun wei chai wei Jiang Key Laboratory of Systems Bioengineering (Ministry of Education) School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China

Two new series of 1,2,3-triazole derivatives, with and without iodo substitution, were synthesized and their gelation properties were measured. It was found that the iodo substitution at position 5 of triazole ring could greatly enhance the gelation ability. Scanning electron microscopy and X-ray diffraction reveal that the structures of the organogels from iodo and hydrogenous gelators are totally different, lodo gels are selectively responsive to the stimuli of Hg2＋, whereas hydrogenous gels can respond to Hg2＋ and Cu2＋. Moreover, the reversible gel-sol transition of hydrogenous gels can be controlled by redox reaction or tuned with suitable chemicals. The single crystal analysis of reference compound （C2） suggests that there are intermolecular and intramolecular non-classical hydrogen bonding interactions but no π-π interaction in hydrogenous gelator. The great difference between the two series of compounds results from the iodo effect and implies the existence of halogen bonding interaction in the iodo compounds.

关键词： organogelator assembly halogen bonding 1,2,3-triazole derivatives self-cation response

Effect of SiO_2 addition on the dielectric properties and microstructure of BaTiO_3-based ceramics in reducing sintering

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International Journal of Minerals,Metallurgy and Materials 2009年第1期16卷 124-127页

作者： Ying-chieh Lee wei-hua Lu Su-hei Wang chai-wei Lin Department of Material Engineering Pingtung University of Technology ＆ Science China Taipei Electronic Ceramics Research Center Yageo Kaohsiung 811 China Taipei

The effect of SiO2 doping on the sintering behavior, microstructure, and dielectric properties of BaTiO3-based ceramics has been investigated. Silica was added to the BaTiO3-based powder prepared by the solid state method with 0.075mol%, 0.15mol%, and 0.3mol%, respectively. The SiO2-doped BaTiO3-based ceramic with high density and uniform grain size were obtained, which were sintered in reducing atmosphere. A scanning electron microscope, X-ray diffraction, and LCR meter were used to determine the microstructure as well as the dielectric properties. SiO2 can form a liquid phase belonging to the ternary system of BaO-TiO2-SiO2, leading to the formation of BaTiO3 ceramics with high density at a lower sintering temperature. The SiO2-doped BaTiO3-based ceramics can be sintered to a theoretical density higher than 95% at 1220℃ with a soaking time of 2 h. The dielectric constants of the sample with 0.15mol% SiO2 addition sintered at 1220℃ is about 9000. Doping with a small amount of silica can improve the sintering and dielectric properties of BaTiO3-based ceramics.

关键词： barium titanate multilayer ceramic capacitor (MLCC) reducing atmosphere dielectric properties

Extreme Value Estimation of Beaufort Sea Ice Dynamics Driven by Global Wind Effects

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China Ocean Engineering 2022年第4期36卷 532-541页

作者： Chana Sinsabvarodom Arvid Næss Bernt J.Leira wei chai Department of Marine Technology Norwegian University of Science and TechnologyTrondheim 7491Norway Department of Mathematical Sciences Norwegian University of Science and TechnologyTrondheim 7491Norway School of Naval Architecture Ocean and Energy Power EngineeringWuhan University of TechnologyWuhan 430070China

The purpose of the present study is to investigate the extreme values of the ice drift speed,which are also considered in the light of the magnitude of the simultaneous wind *** relationship between wind speed and ice drift speed is *** long-term ice drift data is collected by using local subsurface measurements based on acoustic Doppler current profilers(ADCP)in the Beaufort Sea during the period of ***-looking sonars(ULS)are deployed in order to observe the ice thickness as well as to identify events that correspond to open water *** relationship between the ice drift speed and the wind speed is also *** is found that the magnitude of the average ice drift speed is approximately 2.5%of the wind speed during the winter *** of the extreme values of the ice drift speed is studied by application of the average conditional exceedance rate(ACER)*** is found that the extreme ice drift speed during the ice melt season(*** summer season)is approximately20%-30%higher than that during the ice growth season(*** winter season).The extreme ice drift speed can be effectively estimated based on the 2.5%wind ***,the extreme ice drift speed can be obtained based on the extreme values of 2.5%of the wind speed based on multiplying with an amplification factor which varies in the range from 1.7 to 2.0 during the growth season,corresponding to increasing return periods of 10,25,50 and 100years.

关键词： ice drift extreme wind speed extreme ice-drift speed

Analysis of Sub-Synchronous Oscillation of Virtual Synchronous Generator and Research on Suppression Strategy in Weak Grid

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Energy Engineering 2023年第11期120卷 2683-2705页

作者： Chongyang Zhao wei chai Beibei Rui Lin Chen Jianbi Power Plant of National Energy Group Zhenjiang21200China

At present,the direct drive permanent magnet synchronous generator(DD-PMSG)grid connected system based on virtual synchronous generator(VSG)control will experience power oscillation at sub synchronous *** mechanism and characteristics of this new type of sub-synchronous interaction(SSI)are not yet clear,and the system cannot recover to steady state solely based on the characteristics of VSG *** when connected to a weak current network,oscillations are more pronounced,affecting the stability of the *** severe cases,the systemmay trigger shutdown protection and be disconnected from the *** research has only analyzed the oscillation mechanism under this phenomenon and has not proposed corresponding control *** article proposes aVSM control strategy based on the VSG control algorithm,which balances the dq axis component of voltage and current,and improves the voltage and current loop of VSG control to reduce the impact of sub-synchronous oscillation(SSO)on the power *** MATLAB/Simulink,a simulation model of the proposed control strategy was built to verify its correctness and effectiveness.

关键词： PMSG VSG subsynchronous oscillation impedance modelling

Wastewater treatment control method based on a rule adaptive recurrent fuzzy neural network

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International Journal of Intelligent Computing and Cybernetics 2017年第2期10卷 94-110页

作者： Junfei Qiao Gaitang Han Honggui Han wei chai Faculty of Information Technology Beijing University of TechnologyBeijingChina Beijing Key Laboratory of Computational Intelligence and Intelligent System Beijing University of TechnologyBeijingChina

Purpose-The purpose of this paper is to present an on-line modeling and controlling scheme based on the dynamic recurrent neural network for wastewater treatment ***/methodology/approach-A control strategy based on rule adaptive recurrent neural network(RARFNN)is proposed in this paper to control the dissolved oxygen(DO)concentration and nitrate nitrogen(SNo)*** structure of the RARFNN is self-organized by a rule adaptive algorithm,and the rule adaptive algorithm considers the overall information processing ability of neural ***,a stability analysis method is given to prove the convergence of the proposed ***-By application in the control problem of wastewater treatment process(WWTP),results show that the proposed control method achieves better performance compared to other ***/value-The proposed on-line modeling and controlling method uses the RARFNN to model and control the dynamic *** RARFNN can adjust its structure and parameters according to the changes of biochemical reactions and pollutant ***,the rule adaptive mechanism considers the overall information processing ability judgment of the neural network,which can ensure that the neural network contains the information of the biochemical reactions.

关键词： Information processing ability Recurrent fuzzy neural network Rule adaptive Wastewater treatment

Organogelators based on p-alkoxylbenzamide and their self-assembling properties

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Frontiers of Chemical Science and Engineering 2015年第4期9卷 488-493页

作者： Yan Zhai wei chai Wenwen Cao Zipei Sun Yaodong Huang Key Laboratory of Systems Bioengineering Ministry of Education School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

A series of p-alkoxylbenzamides featuring a long alkyl chain have been synthesized and are readily to form stable gels in a variety of organic solvents. Their selfassembly properties and structure-property relationship were investigated by scanning electron microscopy, X-ray diffraction, IH nuclear magnetic resonance, and Fourier transform infrared spectroscopy. The gels formed were multi-responsive to environmental stimuli such as temperature and fluoride anion. The results show that a combination of hydrogen bonding, n-n stacking and van der Waals interaction result in the aggregation of palkoxylbenzamides to form three-dimension networks, depending on the length of the long alkyl chain.

关键词： p-alkoxylbenzamide organogelator self-assembly gelation

Synaptic remodeling in mouse motor cortex after spinal cord injury

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Neural Regeneration Research 2021年第4期16卷 744-749页

作者： Ke-Xue Zhang Jia-Jia Zhao wei chai Ji-Ying Chen Department of Pediatric Surgery Chinese PLA General HospitalBeijingChina Department of Anesthesiology Shunyi District HospitalBeijingChina Department of Orthopedics Chinese PLA General HospitalBeijingChina

Spinal cord injury dramatically blocks information exchange between the central nervous system and the peripheral nervous *** resulting fate of synapses in the motor cortex has not been well *** explore synaptic reorganization in the motor cortex after spinal cord injury,we established mouse models of T12 spinal cord hemi-section and then monitored the postsynaptic dendritic spines and presynaptic axonal boutons of pyramidal neurons in the hindlimb area of the motor cortex in *** results showed that spinal cord hemisection led to the remodeling of dendritic spines bilaterally in the motor cortex and the main remodeling regions changed over *** made previously stable spines unstable and eliminated spines more unlikely to be *** was a significant increase in new spines in the contralateral motor ***,the low survival rate of the new spines demonstrated that new spines were still *** of presynaptic axonal boutons found no significant *** results suggest the existence of synapse remodeling in motor cortex after spinal cord hemi-section and that spinal cord hemi-section affected postsynaptic dendritic spines rather than presynaptic axonal *** study was approved by the Ethics Committee of Chinese PLA General Hospital,China(approval No.201504168S)on April 16,2015.

关键词： central nervous system plasticity recovery regeneration repair spinal cord injury synapses

AN UNUSUAL BILATERAL VAGAL PARAGANGLIOMAS: ONE CASE STUDY

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Chinese Medical Sciences Journal 2006年第3期21卷 197-200页

作者： Hai-hong Chen Liang chai wei Pan Department of Otorhinolaryngology the First Affiliated Hospital College of Medicine Zhejiang University Hangzhou 310003

VAGAL paraganglioma （VP） is an uncommon neoplasm originating from neural crest paraganglion cells located along the vagus nerve, repre-senting less than 5 % of all paragangliomas of the head and neck Despite improve... 详细信息

关键词： bilateral vagal paragangliomas treatment

Novel PLCZ1 mutation caused polyspermy during in vitro fertilization

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Asian Journal of Andrology 2024年第4期26卷 389-395页

作者： Ke-Ya Tong wei-wei Liu Li-wei Sun Dong-Yun Liu Ye-Zhou Xiang Chong Li Lu-wei chai Ke Chen Guo-Ning Huang Jing-Yu Li Chongqing Key Laboratory of Human Embryo Engineering Center for Reproductive MedicineWomen and Children’s Hospital of Chongqing Medical UniversityChongqing 400012China Chongqing Clinical Research Center for Reproductive Medicine Center for Reproductive MedicineChongqing Health Center for Women and ChildrenChongqing 400012China.

Failure of oocyte activation,including polyspermy and defects in pronuclear(PN)formation,triggers early embryonic developmental *** studies have shown that phospholipase C zeta 1(PLCZ1)mutations cause failure of PN formation following intracytoplasmic sperm injection(ICSI);however,whether PLCZ1 mutation is associated with polyspermy during in vitro fertilization(IVF)remains ***-exome sequencing(WES)was performed to identify candidate mutations in couples with primary *** sequencing was used to validate the *** PLCZ1-mutated sperm were injected into human and mouse oocytes to explore whether PN formation was *** oocyte activation(AOA)after ICSI was performed to overcome the failure of oocyte *** identified three PLCZ1 mutations in three patients who experienced polyspermy during IVF cycles,including a novel missense mutation c.1154C>T,*** formation failure was observed during the ICSI ***,injection of multiple PLCZ1-mutated sperm induced PN formation,suggesting that the Ca2+oscillations induced by the sperm exceeded the necessary threshold for PN *** after ICSI enabled normal fertilization,and all patients achieved successful *** findings expand the mutational spectrum of PLCZ1 and suggest an important role for PLCZ1 in terms of blocking ***,this study may benefit genetic diagnoses in cases of abnormal fertilization and provide potential appropriate therapeutic measures for these patients with sperm-derived polyspermy.

关键词： AOA PLCZ1 polyspermy pronuclear formation