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Science China Technological Sciences 2025年第1期 82-84页

作者： meng XIANG Kai DENG Tianyu WANG Jinpeng LIU Xue DONG Teli XI fei LIU Xiaopeng SHAO School of Optoelectronic Engineering Xidian University Xi'an Key Laboratory of Computational Imaging National Key Laboratory of Infrared Detection Technologies

High-resolution imaging through randomly dynamic scattered fields and highly scattered walls is an extensively sought-after capability with potential applications in various fields such as underwater imaging, biomedical imaging, and seeing through fog. Numerous methods have been proposed to unscramble object information from degraded scattered images, resulting in considerable improvements in image contrast in degraded scenarios [1].

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河道沿岸土体崩塌阻塞水流的影响研究

价值工程 2018年第27期37卷 257-259页

作者：贠元璐李晓梦尹飞翔黄河勘测规划设计有限公司郑州450003

本文利用CCHE-2D数值模型软件仿真探讨A溪遭到崩塌土石阻塞后,在不同重现期的来水及来砂量下,对河道左岸生态环境的影响。经模型软件检定及验证后,进行崩塌土石阻塞河道程度的情境模拟。

关键词：不同阻塞程度 CCHE-2D 情境模拟

miRNA-21-5p is an important contributor to the promotion of injured peripheral nerve regeneration using hypoxia-pretreated bone marrow-derived neural crest cells

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Neural Regeneration Research 2025年第1期20卷 277-290页

作者： meng Cong Jing-Jing Hu Yan Yu Xiao-Li Li Xiao-Ting Sun Li-Ting Wang Xia Wu Ling-Jie Zhu Xiao-Jia Yang Qian-Ru He fei Ding Hai-Yan Shi School of Medicine Nantong UniversityNantongJiangsu ProvinceChina Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education and Coinnovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina Department of Physiology Jiangsu Health Vocational CollegeNanjingJiangsu ProvinceChina Department of Pathology Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina

Our previous study found that rat bone marrow–derived neural crest cells(acting as Schwann cell progenitors)have the potential to promote long-distance nerve ***-based therapy can enhance peripheral nerve repair and regeneration through paracrine bioactive factors and intercellular ***,the complex contributions of various types of soluble cytokines and extracellular vesicle cargos to the secretome remain *** investigate the role of the secretome and extracellular vesicles in repairing damaged peripheral nerves,we collected conditioned culture medium from hypoxia-pretreated neural crest cells,and found that it significantly promoted the repair of sensory neurons damaged by oxygen-glucose *** mRNA expression of trophic factors was highly expressed in hypoxia-pretreated neural crest *** performed RNA sequencing and bioinformatics analysis and found that miR-21-5p was enriched in hypoxia-pretreated extracellular vesicles of neural crest ***,to further clarify the role of hypoxia-pretreated neural crest cell extracellular vesicles rich in miR-21-5p in axonal growth and regeneration of sensory neurons,we used a microfluidic axonal dissociation model of sensory neurons in vitro,and found that hypoxia-pretreated neural crest cell extracellular vesicles promoted axonal growth and regeneration of sensory neurons,which was greatly dependent on loaded ***,we constructed a miR-21-5p-loaded neural conduit to repair the sciatic nerve defect in rats and found that the motor and sensory functions of injured rat hind limb,as well as muscle tissue morphology of the hind limbs,were obviously *** findings suggest that hypoxia-pretreated neural crest extracellular vesicles are natural nanoparticles rich in ***-21-5p is one of the main contributors to promoting nerve regeneration by the neural crest cell *** helps to explain the mechanism of action of the secretome and e

关键词： axotomy cell-free therapy conditioned medium extracellular vesicles hypoxic preconditioning microRNA oxygen-glucose deprivation peripheral nerve injury Schwann cell precursors

Design of a Microwave Filter Based on a Novel Negative Coupling Structure with Conical Through-Hole

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China Communications 2022年第2期19卷 148-157页

作者： Shunliang meng fei Liang Wenzhong Lu Zihang Lin Yuhao yin Rong Zhang School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan430074China Wenzhou Advanced Manufacturing Institute Huazhong University of Science and TechnologyWenzhou325000China

This article introduces the design theory of ceramic waveguide filter and proposes a new type of negative coupling structure with a conical throughhole,which has fine-adjustment of negative coupling without significantly increasing the insertion loss of the *** on this,the article proposes an eightcavity ceramic waveguide filter design for 5G base *** also presents a detailed discussion on the influence of the cross-coupling slot lengths L2 and L4 on the transmission zeros positions during the filter optimization process and the relevant change *** the proposed optimized filter,the observed performance indicators include the center frequency of 3.5 GHz,working bandwidth of 200 MHz,an insertion loss of≤2.0 dB,return loss of≥19 dB,and out-of-band nearend suppression and out-of-band far-end suppression of≥39 dB and≥63 dB,*** test performance results obtained for the sample,with structural parameters as per the simulation model,were in good agreement with the simulation results.

关键词： ceramic waveguide filter negative coupling structure out-of-band suppression characteristics cross-coupling slot

Experimental study on mix proportion optimization of anti-calcium dissolution shotcrete for tunnels based on response surface methodology

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Underground Space 2024年第2期15卷 203-220页

作者： Chongming Tian Yueping Tong Junyuan Zhang fei Ye Guifeng Song yin Jiang meng Zhao School of Highway Chang’an UniversityXi’an 710064China Yunnan Laman Expressway Co. Ltd.Yunnan Xishuangbanna 666300China Hebei Traffic Planning Design Institute Shijiazhuang 050035China

Aiming at the issue of crystallization and blockage of drainage system due to the massive calcium loss from the tunnel shotcrete,a selfdesigned tunnel seepage crystallization modelling system was *** system was produced in conjunction with the initial tunnel support shotcrete construction and drainage pipe installation,and is capable of simulating both the seepage process of groundwater in the shotcrete and the process of crystallization in the drainage *** on three different mechanisms of anti-crystallization,which include absorbing free calcium,reducing the porosity and increasing hydrophobicity,antialkali agent,nano-calcium carbonate,and silane were selected to test,***,the suitable dosing ranges of these three external admixtures for resisting calcium loss in shotcrete were determined by single factor tests,which were 7%–11%,4%–8%,and 0.3%–0.5%,***,the response surface method was employed to evaluate the interaction of antialkali agent,nano-calcium carbonate and silane on calcium loss in shotcrete,and to establish the relationship between them,and thus to determine the admixture ratio that can effectively reduce calcium loss crystallization in shotcrete,with the optimal admixture amounts of antialkali agent being 9.242%,nano-calcium carbonate 4.889%and silane 0.366%.Lastly,the reliability of the model test results was verified by the microscopic analysis,and the results showed that the total amount of calcium dissolution in the optimized group could be reduced by 75%compared with the blank control group,and was basically consistent with that derived from the response surface regression model,validating the high accuracy of the buildup response surface regression *** present study can provide some ideas and references for reducing the seepage crystallization behavior of groundwater in the initial tunnel support shotcrete.

关键词： Tunnel engineering Calcium loss Crystallization blockage Model test Response surface methodology Interaction effect

Analysis of parental strain DNA fragments existing in GEMs-Fhhh

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Journal of Environmental Sciences 2003年第5期15卷 590-594页

作者： HAOChun-bo YANJun QUmeng-meng WANGDong CHENGShu-pei GUJi-dong QIUWan-fei WANGyin-yin TheNationalKeyLaboratoryofPollutionControlandResourceReuse SchoolofEnvironmentalScienceNanjingUniversityNanjing210093China DepartmentofEcology&Biodiversity TheUniversityofHongKongPokfulamRoadHongKongChina

There were 6 target DNA fragments of the three parental strains existing in the cell of GEMs(genetically engineered microorganism strain) Fhhh measured in this research by PCR(polymerase chain reaction). The determination showed that GEMs Fhhh contained all the 6 target DNA fragments, mnp 1, mnp 2、 lip 1、 lip 2, FLO 1 and 16S rDNA, and had the molecular genetic stability. Meanwhile the PCR production of each parental strain could only had its target DNA fragments and was different from each other. It may illustrate that the technique of the inter kingdom protoplast fusion for the construction of GEMs Fhhh through the process of intercellular gene recombination could be used as a reliable bioengineering technique to create the specific functional stain for the pollution control.

关键词： GEMs protoplast fusion target gene DNA fragment PCR pollution control

KNOWLEDGE-SCIENTIFIC EVALUATION OF COMMUNITY SERVICE SYSTEMS

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Journal of Systems Science and Systems Engineering 2016年第3期25卷 287-302页

作者： fei meng Yoshiteru Nakamori School of Knowledge Science Japan Advanced lnstitute of Science and Technology Ishikawa Japan

This paper proposes a knowledge-scientific approach to evaluation of community service systems from the viewpoints of knowledge creation, consciousness reform, and value co-creation. A concrete example of the commtmity service system treated here is an education program for old men to find their reason for living after the retirement. After introducing this program and the traditional evaluation methods for such a program, the paper emphasizes the necessity of developing new evaluation methods for such a community service system based on knowledge science. The paper proposes a new evaluation framework and reports an actual evaluation result using the interview data from participants in that program.

关键词： Service system program evaluation knowledge creation consciousness reform value co-creation knowledge science.

Modified micro-mechanics based multiscale model for progressive failure prediction of 2D twill woven composites

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Chinese Journal of Aeronautics 2020年第7期33卷 2070-2087页

作者： meng WANG Peiwei ZHANG Qingguo fei fei GUO Institute of Aerospace Machinery and Dynamics Southeast UniversityNanjing 211189China Department of Engineering Mechanics Southeast UniversityNanjing 211189China

To consider fiber random distribution at the microscale for the multiscale model based on the micro-mechanics failure(MMF)theory,clustering method is used for the extraction of amplification *** the clustering method is a kind of unsupervised machine learning method,the elements with similar mechanical behavior under external loading can be included in a cluster automatically at the *** this modification,the fiber random distribution model can be used for multiscale damage analysis in the framework of MMF *** validate the modified multiscale analysis method,progressive damage analysis of a kind of 2D twill woven composites is conducted based on different microscale *** stress values for microscale models with fiber hexagonal and random distribution patterns are compared *** higher stress concentration is generated in the fiber random distribution model due to the smaller inter-fiber distance especially under longitudinal shear *** obtained cluster distribution results exhibit the characters of the stress distribution in the two microscale ***,tensile and compressive responses of the 2D twill woven composite are predicted with the modified multiscale analysis method and accuracy of the method is verified through comparison with published experimental *** the simulation results,it can be found that the matrix damage initiation from the model based on the fiber random distribution model is premature compared with that from the model based on the fiber hexagonal distribution ***,under tensile loading,the damage all initiates from the fill tows and propagates to the wrap ***,under compressive loading,the matrix damage initiates from the wrap tows in the model based on the fiber random distribution model.

关键词： 2D twill woven composites Clustering analysis Fiber distribution patterns Micro-mechanics failure theory Multiscale damage model

ABDKS:attribute-based encryption with dynamic keyword search in fog computing

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Frontiers of Computer Science 2021年第5期15卷 187-195页

作者： fei meng Leixiao CHENG Mingqiang WANG School of Mathematics Shandong UniversityJinan 250100China Key Laboratory of Cryptologic Technology and Information Security Ministry of EducationJinan 250100China School of Mathematical Sciences Fudan UniversityShanghai 200433China

Attribute-based encryption with keyword search(ABKS)achieves both fine-grained access control and keyword ***,in the previous ABKS schemes,the search algorithm requires that each keyword to be identical between the target keyword set and the ciphertext keyword set,otherwise the algorithm does not output any search result,which is not conducive to ***,the previous ABKS schemes are vulnerable to what we call a peer-decryption attack,that is,the ciphertext may be eavesdropped and decrypted by an adversary who has sufficient authorities but no information about the ciphertext *** this paper,we provide a new system in fog computing,the ciphertext-policy attribute-based encryption with dynamic keyword search(ABDKS).In ABDKS,the search algorithm requires only one keyword to be identical between the two keyword sets and outputs the corresponding correlation which reflects the number of the same keywords in those two *** addition,our ABDKS is resistant to peer-decryption attack,since the decryption requires not only sufficient authority but also at least one keyword of the *** that,the ABDKS shifts most computational overheads from resource constrained users to fog *** security analysis shows that the ABDKS can resist Chosen-Plaintext Attack(CPA)and Chosen-Keyword Attack(CKA).

关键词： access control attribute-based encryption keyword search fog computing outsourcing