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3,4-Dichlorotoluene Ammoxidation to 3,4-Dichlorobenzonitrile over VPO/SiO_2 Catalyst

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Wuhan University Journal of Natural Sciences 2002年第3期7卷 353-355页

作者： Huang Chi, Xiao Di, Xu hai\|xia, zheng qiong, Chen Yuan\|yin College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei. China College of Chemistry and Molecular Sciences Wuhan University Wuhan Hubei China

Ammoxidation of 3,4\|dichlorotoluene(DCT) to prepare 3,4\|dichlorobenzonitrile (DCBN) over silica supported vanadium phosphorus oxide catalysts has been studied. On the VPO/SiO 2 catalyst, the influence of the reaction temperature, the molar ratio of air/DCT, the molar ratio of NH 3 /DCT in the feed gas and the space velocity ( v s) on the conversion, yield and selectivity was observed. The most appropriate reaction condition is: reaction T =673 K, n (DCT)∶ n (NH 3 )∶ n (air)=1∶7∶30 and v s=250 h -1 . At this optimum reaction condition, the conversion of DCT is 97.8%; the molar yield of DCBN is 67.4%. It was found that the addition of element phosphorus can improve the yield of DCBN compared with VO/SiO 2 catalyst.

关键词： ammoxidation 3,4\|dichlorotoluene 3,4\|dichlorobenzonitrile VPO/SiO 2

CNKSR2 interactome analysis indicates its association with the centrosome/microtubule system

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Neural Regeneration Research 2025年第8期20卷 2420-2432页

作者： Lin Yin Yalan Xu Jie Mu Yu Leng Lei Ma Yu zheng Ruizhi Li Yin Wang Peifeng Li hai Zhu Dong Wang Jing Li Institute for Translational Medicine The Affiliated Hospital of Qingdao UniversityMedical CollegeQingdao UniversityQingdaoShandong ProvinceChina School of Basic Medicine Qingdao UniversityQingdaoShandong ProvinceChina College of Life Sciences and School of PharmacyMedical CollegeQingdao UniversityQingdaoShandong ProvinceChina Department of Urology Qingdao Municipal Hospital Affiliated to Qingdao UniversityQingdaoShandong ProvinceChina

The protein connector enhancer of kinase suppressor of Ras 2(CNKSR2),present in both the postsynaptic density and cytoplasm of neurons,is a scaffolding protein with several protein-binding *** of the CNKSR2 gene have been implicated in neurodevelopmental disorders,particularly intellectual disability,although the precise mechanism involved has not yet been fully *** has demonstrated that CNKSR2 plays a role in facilitating the localization of postsynaptic density protein complexes to the membrane,thereby influencing synaptic signaling and the morphogenesis of dendritic ***,the function of CNKSR2 in the cytoplasm remains to be *** this study,we used immunoprecipitation and high-resolution liquid chromatography-mass spectrometry to identify the interactors of *** a combination of bioinformatic analysis and cytological experiments,we found that the CNKSR2 interactors were significantly enriched in the proteome of the *** also showed that CNKSR2 interacted with the microtubule protein DYNC1H1 and with the centrosome marker *** colocalization analysis confirmed the centrosomal localization of *** we downregulated CNKSR2 expression in mouse neuroblastoma cells(Neuro 2A),we observed significant changes in the expression of numerous centrosomal *** manipulation also affected centrosome-related functions,including cell size and shape,cell proliferation,and ***,we found that CNKSR2 interactors were highly enriched in de novo variants associated with intellectual disability and autism spectrum *** findings establish a connection between CNKSR2 and the centrosome,and offer new insights into the underlying mechanisms of neurodevelopmental disorders.

关键词： autism spectrum disorder centrosome CNKSR2 intellectual disability interactome mass spectrometry microtubule neurodevelopmental disease protein complexes protein-protein interactions

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肌力定量检查方法研究进展

中国康复理论与实践 2017年第7期23卷 766-769页

作者：刘根林李建军周红俊康海琼郑樱郝春霞张缨卫波逯晓蕾袁媛首都医科大学康复医学院北京市100068 中国康复研究中心北京博爱医院北京市100068

由于徒手肌力检查不能定量反映肌力增强的训练效果,人们越来越多地开始应用等速仪器和手持测力计等工具进行肌力定量检查。本文简要回顾了临床常用肌力检查方法的发展历程,对各种肌力定量检查方法的优缺点进行了比较分析,在此基础上提... 详细信息

由于徒手肌力检查不能定量反映肌力增强的训练效果,人们越来越多地开始应用等速仪器和手持测力计等工具进行肌力定量检查。本文简要回顾了临床常用肌力检查方法的发展历程,对各种肌力定量检查方法的优缺点进行了比较分析,在此基础上提出了临床肌力检查的具体操作建议。

关键词：肌力定量检查等速仪器手持测力计测试康复综述

Transparently manipulating spin-orbit qubit via exact degenerate ground states

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Chinese Physics B 2020年第8期29卷 217-227页

作者： Kuo hai Wenhua Zhu qiong Chen Wenhua hai Department of Physics and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China

By investigating a harmonically confined and periodically driven particle system with spin-orbit coupling(SOC)and a specific controlled parameter,we demonstrate an exactly solvable two-level model with a complete set of spin-motion entangled Schrödinger kitten(or cat)*** the undriven case,application of a modulation resonance results in the exact stationary *** show a decoherence-averse effect of SOC and implement a transparent coherent control by exchanging positions of the probability-density wavepackets to create transitions between the different degenerate ground *** expected energy consisting of quantum and continuous parts is derived,and the energy deviations caused by the exchange operations are much less than the quantum *** results could be directly extended to a weakly coupled single-particle chain for transparently encoding spin-orbit qubits via the robust spin-motion entangled degenerate ground states.

关键词： transparent coherent control spin-orbit qubit exact degenerate ground state spin-orbit coupling spin-motion entanglement

Image De-occlusion via Event-enhanced Multi-modal Fusion Hybrid Network

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Machine Intelligence Research 2022年第4期19卷 307-318页

作者： Si-Qi Li Yue Gao qiong-hai Dai Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084China Institute for Brain and Cognitive Sciences Tsinghua UniversityBeijing 100084China Beijing Laboratory of Brain and Cognitive Intelligence Beijing Municipal Education CommissionTsinghua UniversityBeijing 100084China Key Laboratory for Information System Security School of SoftwareTsinghua UniversityBeijing 100084China Department of Automation Tsinghua UniversityBeijing 100084China

Seeing through dense occlusions and reconstructing scene images is an important but challenging *** framebased image de-occlusion methods may lead to fatal errors when facing extremely dense occlusions due to the lack of valid information available from the limited input occluded *** cameras are bio-inspired vision sensors that record the brightness changes at each pixel asynchronously with high temporal ***,synthesizing images solely from event streams is ill-posed since only the brightness changes are recorded in the event stream,and the initial brightness is *** this paper,we propose an event-enhanced multi-modal fusion hybrid network for image de-occlusion,which uses event streams to provide complete scene information and frames to provide color and texture *** event stream encoder based on the spiking neural network(SNN)is proposed to encode and denoise the event stream efficiently.A comparison loss is proposed to generate clearer *** results on a largescale event-based and frame-based image de-occlusion dataset demonstrate that our proposed method achieves state-of-the-art performance.

关键词： Event camera multi-modal fusion image de-occlusion spiking neural network(SNN) image reconstruction

Ultra-robust Metallosupramolecular Hydrogels with Unprecedented Self-recoverability using Asymmetrically Distributed Carboxyl-Fe3+Coordination Interactions

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Chinese Journal of Polymer Science 2023年第2期41卷 250-257页

作者： Zhao-Yang Yuan Zhen-Xing Cao Rui Wu Hui Li qiong-Jun Xu hai-Tao Wu Jing zheng Jin-Rong Wu State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu610065China

Recently,numerous mechanically robust synthetic hydrogels have been ***,unlike natural loading-bearing materials such as cartilages and muscles,most hydrogels have inherently contradictory requirements,obstructing the design of hydrogels with characteristics of robustness and rapid ***,we present a facile strategy for constructing mechanically robust and rapidly self-recoverable *** linear poly(acrylamide-co-itaconic acid)chains crosslink via coordination bonds and minimal chemical crosslinkers to form the hydrogel *** design endows the coordination interactions to be asymmetrically *** deformation,the coordination interactions exhibit a reversible dissociation-and-reorganization property,demonstrating a new mechanism for energy dissipation and stress ***,the hydrogels possess tensile strength up to 12.5 MPa and toughness up to 28.2 MJ/***,the inherent dynamic nature of the coordination bonds imparts these hydrogels with stretch rate-and temperature-dependent mechanical behavior as well as excellent self-recovery *** method employed in this study is universal and is applicable to other polymers with load-bearing yet rapid recovery *** study will facilitate diverse applications of most metallosupramolecular hydrogels.

关键词： Metallosupramolecular hydrogels Coordination interactions Self-recoverability

Design of Self‑Reconfigurable Multiarm Robot Mechanism Based on Deployable Kinematic Chains

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Chinese Journal of Mechanical Engineering 2020年第5期33卷 34-50页

作者： Fu‑Qun Zhao Sheng Guo hai‑Jun Su hai‑Bo Qu Ya‑qiong Chen School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China

As the structures of multiarm robots are serially arranged,the packaging and transportation of these robots are often *** ability of these robots to operate objects must also be *** this issue,this paper presents a type of multiarm robot that can be adequately folded into a designed *** robot can achieve different operation modes by combining different arms and ***,deployable kinematic chains(DKCs)are designed,which can be folded into a designated area and be used as an arm structure in the multiarm robot *** strategy of a platform for storing DKCs is *** on the restrictions in the storage area and the characteristics of parallel mechanisms,a class of DKCs,called base assembly library,is ***,an assembly method for the synthesis of the multiarm robot mechanism is proposed,which can be formed by the connection of a multiarm robot mechanism with an operation object based on a parallel mechanism *** formed parallel mechanism can achieve a reconfigurable characteristic when different DKCs connect to the operation *** this method,two types of multiarm robot mechanisms with four DKCs that can switch operation modes to perform different tasks through autonomous combination and release operation is *** obtained mechanisms have observable advantages when compared with the traditional mechanisms,including optimizing the occupied volume during transportation and using parallel mechanism theory to analyze the switching of operation modes.

关键词： Design Multiarm robot Deployable kinematic chain Parallel mechanism Motion set

Time allocation scheme in IEEE 802.15.3 TDMA mechanism

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第Z1期7卷 159-164页

作者： LIU Xin DAI qiong-hai WU Qiu-feng Department of Automation Tsinghua University Beijing 100084 China Department of Automation Tsinghua University Beijing 100084 China Department of Automation Tsinghua University Beijing 100084 China

In network with a shared channel in TDMA mechanism, it is a core issue to effectively allocate channel time to provide service guarantees for flows with QoS requirements. This paper proposes a simple and efficient time allocation scheme called MES-ESRPT (MCTA at the End of Superframe-Enhanced Shortest Remaining Processing Time) for delay-sensitive VBR traffic in accordance with IEEE 802.15.3 standard. In this algorithm, PNC (piconet coordinator) allocates one MCTA (Management Channel Time Allocation) for each stream which is the process of communication at the end of superframe. During the MCTA period, each transmitter should report current fragments number of the first MSDU (MAC Service Data Unit) and the fragments number of the remainder MSDUs to PNC. In the next superframe, PNC firstly allocates part CTAs (Channel Time Allocation) for each stream based on the remainder fragments number of the first MSDU by SRPT rule, then allocates remainder CTAs for each stream based on all fragments number of remainder MSDUs by the same SRPT rule. Simulation results showed that our proposed MES-ESRPT method achieves significantly better performance in QoS for multimedia streams compared to the existing schemes.

关键词： Shortest remaining processing time (SRPT), MAC layer, TDMA, Quality of Service (QoS)

Effects of primary microglia and astrocytes on neural stem cells in in vitro and in vivo models of ischemic stroke

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Neural Regeneration Research 2021年第9期16卷 1677-1685页

作者： Sheng-Jun Wen Xi-Min zheng Li-Fen Liu Na-Na Li hai-An Mao Liang Huang qiong-Lan Yuan Department of Neurology Shanghai Tongji HospitalTongji University School of MedicineShanghaiChina

Transplantation of neural stem cells(NSCs) can protect neurons in animal stroke models;however, their low rates of survival and neuronal differentiation limit their clinical application. Glial niches, an important location of neural stem cells, regulate survival, proliferation and differentiation of neural stem cells. However, the effects of activated glial cells on neural stem cells remain unclear. In the present study, we explored the effects of activated astrocytes and microglia on neural stem cells in vitro stroke models. We also investigated the effects of combined transplantation of neural stem cells and glial cells after stroke in rats. In a Transwell co-culture system, primary cultured astrocytes, microglia or mixed glial cells were exposed to glutamate or H_2O_2 and then seeded in the upper inserts, while primary neural stem cells were seeded in the lower uncoated wells and cultured for 7 days. Our results showed that microglia were conducive to neurosphere formation and had no effects on apoptosis within neurospheres, while astrocytes and mixed glial cells were conducive to neurosphere differentiation and reduced apoptosis within neurospheres, regardless of their pretreatment. In contrast, microglia and astrocytes induced neuronal differentiation of neural stem cells in differentiation medium, regardless of their pretreatment, with an exception of astrocytes pretreated with H_2O_2. Rat models of ischemic stroke were established by occlusion of the middle cerebral artery. Three days later, 5 × 10~5 neural stem cells with microglia or astrocytes were injected into the right lateral ventricle. Neural stem cell/astrocyte-treated rats displayed better improvement of neurological deficits than neural stem cell only-treated rats at 4 days after cell transplantation. Moreover, neural stem cell/microglia-, and neural stem cell/astrocyte-treated rats showed a significant decrease in ischemic volume compared with neural stem celltreated rats. These findings indicate

关键词： astrocytes glutamate microglia neural stem cells neurogenesis neurons peroxide repair stroke