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RuCo alloy nanoparticles embedded within N-doped porous two-dimensional carbon nanosheets:a high-performance hydrogen evolution reaction catalyst

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Tungsten 2024年第1期6卷 114-123页

作者： Jin-Hui Wang Shao-Wei Yang Fu-Bin Ma Yi-Ke Zhao Shi-Nuo Zhao Zheng-yu Xiong Dong Cai Hai-Dong Shen Kai Zhu qiu-yu zhang yue-Ling Cao Tian-Shuai Wang He-Peng zhang Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China Xi’an Key Laboratory of Functional Organic Porous Materials School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710129China School of Power and Energy Northwestern Polytechnical UniversityXi’an 710129China Chongqing Science and Technology Innovation Center of Northwestern Polytechnical University Chongqing 401135China

Developing cost-effective electrocatalysts with high activity and stability especially at high current density is of great significance for the large-scale commercial application of electrochemical water splitting to hydrogen production but still remains ***,we report an effective confinement pyrolysis strategy to fabricate embedded ruthenium-cobalt nanoclusters supported on N-doped porous two-dimensional carbon nanosheets(RuCo@CN).Markedly,the embedded structure can effectively prevent the migration,agglomeration,and leaching of nanoparticles,thus endowing the RuCo@CN catalyst with high *** be exact,high stability with up to 650 h can be achieved at high current density(-500 and-1000 mA·cm^(-2)).Besides,the RuCo@CN catalysts also exhibit highly reactive with low overpotentials of only 11mV at-10 mA·cm^(-2).Density functional theory calculations reveal that the introduction of cobalt reduces the decomposition barrier of H_(2)O for RuCo@CN alloy,thus promoting hydrogen evolution reaction.

关键词： Hydrogen evolution reaction Confinement pyrolysis strategy Mosaic structure Stability

Emerging Molecular Targets for the Management of Cancer Pain

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Neuroscience Bulletin 2020年第10期36卷 1225-1228页

作者： Hai-Yan Sheng yu-qiu zhang Department of Pathophysiology School of Basic Medical SciencesXinxiang Medical UniversityXinxiang 453003China State Key Laboratory of Medical Neurobiology and Ministry of Education Frontiers Center for Brain Science Department of Translational NeuroscienceJing*an District Centre Hospital of ShanghaiInstitutes of Brain ScienceInstitute of Integrative MedicineFudan UniversityShanghai 200032China

Pain is a common symptom in cancer patients,even long after the treatment has been *** 39.3%-66.4%of patients with cancer experience moderate to severe pain,especially those with advanced *** experience of pain severely affects the quality of life,including eating,sleeping,thinking,working,and even continuing *** the improvement of cancer treatment and the prolongation of survival time,safe and effective pain management has become a major problem encountered by many clinicians.

关键词： Pain cancer pain

Role of the Anterior Cingulate Cortex in Translational Pain Research

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Neuroscience Bulletin 2021年第3期37卷 405-422页

作者： Xiao Xiao Ming Ding yu-qiu zhang Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence Ministry of EducationInstitute of Science and Technology for Brain-Inspired IntelligenceBehavioral and Cognitive Neuroscience CenterFudan UniversityShanghai 200433China State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science Department of Translational NeuroscienceJing’an District Centre Hospital of ShanghaiInstitutes of Brain ScienceInstitute of Integrative MedicineFudan UniversityShanghai 200032China

As the most common symptomatic reason to seek medical consultation,pain is a complex experience that has been classified into different categories and *** pain processing,noxious stimuli may activate the anterior cingulate cortex(ACC).But the function of ACC in the different pain conditions is not well *** this review,we elaborate the commonalities and differences from accumulated evidence by a variety of pain assays for physiological pain and pathological pain including inflammatory pain,neuropathic pain,and cancer pain in the ACC,and discuss the cellular receptors and signaling molecules from animal *** further summarize the ACC as a new central neuromodulation target for invasive and non-invasive stimulation techniques in clinical pain *** comprehensive understanding of pain processing in the ACC may lead to bridging the gap in translational research between basic and clinical studies and to develop new therapies.

关键词： Anterior cingulate cortex Deep brain stimulation Transcranial magnetic stimulation Transcranial direct current stimulation Pathological pain Inflammatory pain Neuropathic pain Cancer pain

Modeling of unsupervised knowledge graph of events based on mutual information among neighbor domains and sparse representation

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Defence Technology（防务技术） 2022年第12期18卷 2150-2159页

作者： Jing-Tao Sun Jing-Ming Li qiu-yu zhang School of Computer Science and Technology Xi'an University of Posts and TelecommunicationsXi'anShaanxi710121China Shaanxi Key Laboratory of Network Data Analysis and Intelligent Processing Xi'an University of Posts and TelecommunicationsXi'anShaanxi710121China School of Management Science and Engineering Anhui University of Finance and EconomicsBengbuAnhui230030China School of Computer and Communication Lanzhou University of TechnologyLanzhouGansu730050China

Text event mining,as an indispensable method of text mining processing,has attracted the extensive attention of researchers.A modeling method for knowledge graph of events based on mutual information among neighbor domains and sparse representation is proposed in this paper,***,UKGE-MS can improve the existing text mining technology's ability of understanding and discovering high-dimensional unmarked information,and solves the problems of traditional unsupervised feature selection methods,which only focus on selecting features from a global perspective and ignoring the impact of local connection of ***,considering the influence of local information of samples in feature correlation evaluation,a feature clustering algorithm based on average neighborhood mutual information is proposed,and the feature clusters with certain event correlation are obtained;Secondly,an unsupervised feature selection method based on the high-order correlation of multi-dimensional statistical data is designed by combining the dimension reduction advantage of local linear embedding algorithm and the feature selection ability of sparse representation,so as to enhance the generalization ability of the selected feature ***,the events knowledge graph is constructed by means of sparse representation and l1 *** experiments are carried out on five real datasets and synthetic datasets,and the UKGE-MS are compared with five corresponding *** experimental results show that UKGE-MS is better than the traditional method in event clustering and feature selection,and has some advantages over other methods in text event recognition and discovery.

关键词： Text event mining Knowledge graph of events Mutual information among neighbor domains Sparse representation

Involvement of microglia and interleukin-18 in the induction of long-term potentiation of spinal nociceptive responses induced by tetanic sciatic stimulation

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Neuroscience Bulletin 2012年第1期28卷 49-60页

作者： yu-Xia Chu yu-qiu zhang Zhi-Qi Zhao Institute of Neurobiology Institutes of Brain Science and State Key Laboratory of Medical Neurobiology Fudan University Shanghai 200032 China College of Medicine Jiaxmg University Jiaxing Zhejiang 314001 China

Objective The present study aimed to investigate the potential roles of spinal microglia and downstream molecules in the induction of spinal long-term potentiation （LTP） and mechanical allodynia by tetanic stimulation of the sciatic nerve （TSS）. Methods Spinal LTP was induced in adult male Sprague-Dawley rats by tetanic stimulation of the sciatic nerve （0.5 ms, 100 Hz, 40 V, 10 trains of 2-s duration at l 0-s intervals）. Mechanical allodynia was determined using von Frey hairs. Immunohistochemical staining and Western blot were used to detect changes in glial expression of inter- leukin-18 （IL-l 8） and IL-18 receptor （IL-18R）. Results TSS induced LTP of C-fiber-evoked field potentials in the spinal cord. Intrathecal administration of the microglial inhibitor minocycline （200 ~tg/20 gL） 1 h before TSS completely blocked the induction of spinal LTP. Furthermore, after intrathecal injection of minocycline （200 ~tg/20 ~tL） by lumbar puncture 1 h before TSS, administration of minocycline for 7 consecutive days （once per day） partly inhibited bilateral allodynia. Immunohistochemistry showed that minocycline inhibited the sequential activation of microglia and astrocytes, and IL- 18 was predominantly colocalized with the microglial marker Iba-1 in the spinal superficial dorsal horn. Western blot revealed that repeated intrathecal injection of minocyctine significantly inhibited the increased expression of IL-18 and IL- 18Rs in microglia induced by TSS. Conclusion The IL-18 signaling pathway in microglia is involved in TSS-induced spinal LTP and mechanical allodynia.

关键词： long-term potentiation allodynia glia interleukin-18

An Efficient Encrypted Speech Retrieval Based on Unsupervised Hashing and B+ Tree Dynamic Index

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Computers, Materials & Continua 2023年第7期76卷 107-128页

作者： qiu-yu zhang yu-gui Jia Fang-Peng Li Le-Tian Fan School of Computer and Communication Lanzhou University of TechnologyLanzhou730050China

Existing speech retrieval systems are frequently confronted with expanding volumes of speech *** dynamic updating strategy applied to construct the index can timely process to add or remove unnecessary speech data to meet users’real-time retrieval *** study proposes an efficient method for retrieving encryption speech,using unsupervised deep hashing and B+ tree dynamic index,which avoid privacy leak-age of speech data and enhance the accuracy and efficiency of *** cloud’s encryption speech library is constructed by using the multi-threaded Dijk-Gentry-Halevi-Vaikuntanathan(DGHV)Fully Homomorphic Encryption(FHE)technique,which encrypts the original *** addition,this research employs Residual Neural Network18-Gated Recurrent Unit(ResNet18-GRU),which is used to learn the compact binary hash codes,store binary hash codes in the designed B+tree index table,and create a mapping relation of one to one between the binary hash codes and the corresponding encrypted *** B+tree index technology is applied to achieve dynamic index updating of the B+tree index table,thereby satisfying users’needs for real-time *** experimental results on THCHS-30 and TIMIT showed that the retrieval accuracy of the proposed method is more than 95.84%compared to the existing unsupervised hashing *** retrieval efficiency is greatly *** to the method of using hash index tables,and the speech data’s security is effectively guaranteed.

关键词： Encrypted speech retrieval unsupervised deep hashing learning to hash B+tree dynamic index DGHV fully homomorphic encryption

Opposite Sex Contact and Isolation: A Novel Depression/Anxiety Model

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Neuroscience Bulletin 2016年第1期32卷 92-98页

作者： Liu Yang Li-Jun Shi Bei Tang qiu-Qin Han Jin yu Gen-Cheng Wu yu-qiu zhang Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Institute of Neurobiology Institutes of Brain Science and State Key Laboratory of Medical NeurobiologyCollaborative Innovation Center for Brain Science Liver Cancer Institute Zhongshan Hospital Shanghai Medical College Fudan University Department of Integrative Medicine and Neurobiology Shanghai Medical College Fudan University

To mimic human mood disorders, traditional chronic stresses and social defeat stress have been developed and widely applied. However, these active stresses do not mimic the emotional flaws induced by stresses, and their input levels vary greatly. Also, emotional stresses resulting from social unobtainability remain largely elusive due to the lack of useful animal models. In this study, we developed a mouse model named ‘‘opposite sex contact and isolation’’(OSCI) and found that OSCI induced significant social avoidance, anhedonia, and anxiety. These behavioral defects developed differently after 7 days of OSCI. The social avoidance behavior was self-curable while anxiety gradually worsened but was alleviated by re-pairing with the same female partner. Corresponding to the behavior changes, the plasma corticosterone and phosphorylated c AMP response element binding protein levels were decreased in the nucleus accumbens of the mice that experienced isolation. Together,this study has developed a novel strategy for depression/anxiety modeling and shows that OSCI may be a useful tool for studying the lovelorn/lovesick type of depression.

关键词： Social isolation Depression Anxiety Opposite sex contact Social stress Lovelorn

Macroporous magnetic poly(GMA-EGDMA-DVB) microspheres supported palladium complex as an efficient catalyst for Heck reaction

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Chinese Chemical Letters 2010年第9期21卷 1062-1066页

作者： Ding Zhong yuan qiu yu zhang Jin Bo Dou Department of Applied Chemistry School of ScienceNorthwestern Polytechnical UniversityXi’an 710129China

Macroporous magnetic poly(GMA-EGDMA-DVB) microspheres synthesized by suspension polymerization were used as supports for palladium *** results showed the novel magnetic catalyst can promote Heck reaction of aryl halides with acrylic acid efficiently without an inert *** addition,the novel catalyst can be conveniently recovered by applying an external magnet and reused at least five times without significant loss of its activity.

关键词： Macroporous magnetic microspheres Heterogeneous catalyst Heck reaction Palladium Suspension polymerization

Secure Content Based Image Retrieval Scheme Based on Deep Hashing and Searchable Encryption

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Computers, Materials & Continua 2023年第6期75卷 6161-6184页

作者： Zhen Wang qiu-yu zhang Ling-tao Meng Yi-lin Liu School of Computer and Communication Lanzhou University of TechnologyLanzhou730050China

To solve the problem that the existing ciphertext domain image retrieval system is challenging to balance security,retrieval efficiency,and retrieval *** research suggests a searchable encryption and deep hashing-based secure image retrieval technique that extracts more expressive image features and constructs a secure,searchable encryption ***,a deep learning framework based on residual network and transfer learn-ing model is designed to extract more representative image deep ***,the central similarity is used to quantify and construct the deep hash sequence of *** Paillier homomorphic encryption encrypts the deep hash sequence to build a high-security and low-complexity searchable ***,according to the additive homomorphic property of Paillier homomorphic encryption,a similarity measurement method suitable for com-puting in the retrieval system’s security is ensured by the encrypted *** experimental results,which were obtained on Web Image Database from the National University of Singapore(NUS-WIDE),Microsoft Common Objects in Context(MS COCO),and ImageNet data sets,demonstrate the system’s robust security and precise retrieval,the proposed scheme can achieve efficient image retrieval without revealing user *** retrieval accuracy is improved by at least 37%compared to traditional hashing *** the same time,the retrieval time is saved by at least 9.7%compared to the latest deep hashing schemes.

关键词： Content-based image retrieval deep supervised hashing central similarity quantification searchable encryption Paillier homomorphic encryption