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Synergistic Effect of Dual-Doped Carbon on MO_(2)C Nanocrystals Facilitates Alkaline Hydrogen Evolution

Nano-Micro Letters 2023年第10期15卷 101-111页

作者： Min Zhou Xiaoli Jiang weijie kong Hangfei Li Fei Lu Xin Zhou Yagang Zhang School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731People’s Republic of China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054People’s Republic of China College of Physical Science and Technology Yangzhou UniversityYangzhou 225002People’s Republic of China Department of Chemical Engineering Polytechnique MontrealMontrealQC H3C 3A7Canada

Molybdenum carbide(MO_(2)C)materials are promising electrocatalysts with potential applications in hydrogen evolution reaction(HER)due to low cost and Pt-like electronic structures.Nevertheless,their HER activity is usually hindered by the strong hydrogen binding energy.Moreover,the lack of water-cleaving site's makes it difficult for the catalysts to work in alkaline solutions.Here,we designed and synthesized a B and N dual-doped carbon layer that encapsulated on MO_(2)C nanocrystals(MO_(2)C@BNC)for accelerating HER under alkaline condition.The electronic interactions between the MO_(2)C nanocrystals and the multiple-doped carbon layer endow a near-zero H adsorption Gibbs free energy on the defective C atoms over the carbon shell.Meanwhile,the introduced B atoms afford optimal H_2O adsorption sites for the water-cleaving step.Accordingly,the dual-doped MO_(2)C catalyst with synergistic effect of non-metal sites delivers superior HER performances of a low overpotential(99 mV@10 mA cm^(-2))and a small Tafel slope(58.1 mV dec^(-1))in 1 M KOH solution.Furthermore,it presents a remarkable activity that outperforming the commercial 10%Pt/C catalyst at large current density,demonstrating its applicability in industrial water splitting.This study provides a reasonable design strategy towards noble-metal-free HER catalysts with high activity.

关键词： Molybdenum carbide Hydrogen evolution reaction Dual-doped Synergistic effect Superior performances

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Interplay of laser power and pore characteristics in selective laser melting of ZK60 magnesium alloys:A study based on in-situ monitoring and image analysis

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Journal of Magnesium and Alloys 2024年第4期12卷 1346-1366页

作者： weijie Xie Hau-Chung Man Chi-Wai Chan Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong KongChina School of Mechanical and Aerospace Engineering Queen’s UniversityBelfast BT95AHUK Research Institute for Advanced Manufacturing The Hong Kong Polytechnic UniversityHong KongChina

This study offers significant insights into the multi-physics phenomena of the SLM process and the subsequent porosity characteristics of ZK60 Magnesium(Mg)alloys.High-speed in-situ monitoring was employed to visualise process signals in real-time,elucidating the dynamics of melt pools and vapour plumes under varying laser power conditions specifically between 40 W and 60 W.Detailed morphological analysis was performed using Scanning-Electron Microscopy(SEM),demonstrating a critical correlation between laser power and pore formation.Lower laser power led to increased pore coverage,whereas a denser structure was observed at higher laser power.This laser power influence on porosity was further confirmed via Optical Microscopy(OM)conducted on both top and cross-sectional surfaces of the samples.An increase in laser power resulted in a decrease in pore coverage and pore size,potentially leading to a denser printed part of Mg alloy.X-ray Computed Tomography(XCT)augmented these findings by providing a 3D volumetric representation of the sample internal structure,revealing an inverse relationship between laser power and overall pore volume.Lower laser power appeared to favour the formation of interconnected pores,while a reduction in interconnected pores and an increase in isolated pores were observed at higher power.The interplay between melt pool size,vapour plume effects,and laser power was found to significantly influence the resulting porosity,indicating a need for effective management of these factors to optimise the SLM process of Mg alloys.

关键词： Selective laser melting(SLM) Magnesium(Mg)alloys Biodegradable implants Porosity In-situ monitoring

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Defatted Hickory Meal Hydrolysate's Impact on Memory Impairment Induced by D-Galactose in Mice

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Food Science and Human Wellness 2024年

作者： Fanping Qin Ruiling Liu Qi kong Hangjun Chen Xiangjun Fang Huizhi Chen weijie Wu Haiyan Gao State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products Key Laboratory of Post-Harvest Vegetable Preservation and Processing (Co-construction by Ministry and Province) Ministry of Agriculture and Rural Affairs Key Laboratory of Light Industry Fruit and Vegetable Preservation and Processing Institute of Food Science Zhejiang Academy of Agricultural Sciences

Defatted hickory meal (DHM)， a by-product of hickory oil production， is a protein source rich in essential amino acids. In this study， the functional properties of DHM hydrolysate (DHMH) were assessed using in vitro and in vivo assays in context to its antioxidant and memory-enhancing effects. To induce memory impairment， D-galactose (D-gal) was administered to mice at a dose of 120 mg/kg body weight per day， and DHMH was orally administered at doses of 300， 600， and 1000 mg/kg body weight per day for 8 weeks. DHMH treatment led to improved memory performance in D-gal-induced memory-impaired mice， as observed in the Morris water maze test. Furthermore， DHMH mitigated the accumulation of amyloid beta 1-42 triggered by D-gal exposure. Notably， high-dose DHMH significantly reduced the elevation of pro-inflammatory markers， including tumor necrosis factor alpha， interleukin 1β， and interleukin 6. Additionally， DHMH prevented the decline in total superoxide dismutase activity， glutathione peroxidase activity， and glutathione levels， while reducing malondialdehyde content in D-gal-induced mice， indicative of its antioxidant properties. Moreover， DHMH treatment effectively prevented histological alterations in neurons within the hippocampal CA1 area induced by D-gal. Collectively， our findings suggest that DHMH may counteract memory dysfunctions resulting from oxidative stress injury in the brain， positioning it as a potential candidate for use as a functional food.

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High area-capacity Mg batteries enabled by sulfur/copper integrated cathode design

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Journal of Energy Chemistry 2022年第9期31卷 370-378,I0011页

作者： Zhenfang Zhou Aobing Du weijie kong Zhuang Chen Zhonghua Zhang Bingbing Chen Yitao He Shanmu Dong Zhenjiang Li Guicun Li Guanglei Cui College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101ShandongChina Department of Energy Science and Engineering Nanjing Tech UniversityNanjing 211816JiangsuChina Department of Physics Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

Rechargeable Mg batteries potentially display lower cost and competitive energy density compared with their Li-ion counterparts.However,the practical implementation of high area-capacity cathodes still remains a formidably challenging task.This work presents the sulfur/copper integrated cathodes fabricated by the conventional blade-coating process and slurry-dipping method.The sulfur/copper foil integrated cathodes deliver a high area-capacity of 2.6 mAh cm^(-2)after 40 cycles,while the sulfur/copperfoam integrated cathode exhibits an ultrahigh area-capacity of 35.4 mAh cm^(-2),corresponding to 743.1 Wh L^(-1)at the electrode level(1.5 times higher than the LiCoO_(2)-graphite system).The in-situ formed copper sulfide intermediates with sufficient cation defects can act as functional intermediates to regulate the sulfur electrochemistry during the first discharge process.The subsequent cycles are operated by the reversible displacement reaction between Mg-ions and copper sulfide active substances.In particular,the copper ions prefer to extrude along the[001]direction in copper sulfides lattice and simultaneously the rock-salt MgS crystals are generated.Besides,the nonuniform surface topography of the cycled Mgmetal anode,caused by the spatial inhomogeneity in current distribution,is demonstrated to lead to the battery performance degradation for high area-capacity Mg batteries.

关键词： Magnesium batteries Sulfur cathode Displacement reaction Copper sulfides

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Clinical Significance of METTL Family Molecules in Hepatocellular Carcinoma

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Journal of Pharmacy and Pharmacology 2022年第6期10卷 173-189页

作者： weijie kong Fuping Li Wenqi Zhang Shaanxi University of Chinese Medicine Xianyang 712046Shaanxi ProvinceChina

Objective:to search for hepatocellular carcinoma(HCC)in tumor subdivision from different aspects,such as transcripts,proteins,gene mutations,protein interactions,signal pathways and functions.To explore the correlation between METTL1-6 protein family and hepatocellular carcinoma(HCC),and to determine whether METTL family proteins are valuable as potential biomarkers for tumor progression and prognosis of HCC.Methods:We try to use data collection technique to extract the data needed in medical analysis.The correlation between the MRNA expression level of METTL family proteins and the prognosis of HCC patients was obtained from TCGA data.METTL data and clinical data of protein METTL family in tissue samples of HCC patients were obtained from Kaplan-Meier Plotter database for correlation analysis.The immunohistochemical data of METTL family protein 1,2A,2B,3,4,5,6 in normal liver tissue and HCC tissue were obtained from TIMER database.The protein network of METTL proteome was obtained by using STRING database,and the heat map enrichment analysis of proteome interaction between KEGG and GO was done by software.Results:6 of the 7 METTL protein members were highly expressed in HCC tissues,and were positively correlated with the grade and clinical analysis of HCC tumors.

关键词： METTL hepatocellular carcinoma tumor progression prognosis data collection big data

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风机独立变桨减载模型预测控制研究

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电工技术 2024年第4期 17-21页

作者：孔维杰秦斌王欣湖南工业大学电气与信息工程学院湖南株洲412000

针对风力发电机组在额定风速以上运行时承受的不平衡载荷波动问题,提出了一种基于状态空间模型的独立变桨模型预测控制策略。首先基于风机仿真软件FAST对风电机组非线性系统线性化;然后将建立的线性时不变(LTI)模型与非线性风机系统对... 详细信息

针对风力发电机组在额定风速以上运行时承受的不平衡载荷波动问题,提出了一种基于状态空间模型的独立变桨模型预测控制策略。首先基于风机仿真软件FAST对风电机组非线性系统线性化;然后将建立的线性时不变(LTI)模型与非线性风机系统对比验证预测模型的拟合度;最后建立FAST-MATLAB联合仿真的NREL5MW风机模型,在湍流风模式下进行仿真。所提出的控制策略与传统PI控制策略相比,在稳定功率的前提下有效地减少了不平衡载荷,提高了风电机组运行稳定性。

关键词：风电机组模型预测控制功率波动独立变桨不平衡载荷

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高能量Pilon骨折治疗原则研究进展

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国际骨科学杂志 2024年第1期45卷 1-4页

作者：李晗孔维杰郝海虎山西医科大学第三医院(山西白求恩医院、山西医学科学院、同济山西医院)骨科山西太原030032

Pilon骨折指距骨撞击胫骨远端关节面形成的损伤,大部分为高能量垂直暴力所致,常造成胫骨远端干骺端及负重面的粉碎性骨折,且易合并严重的软组织损伤,由于存在骨与软组织的双重障碍,成为临床医生面临的难题。目前对于高能量Pilon骨折临... 详细信息

Pilon骨折指距骨撞击胫骨远端关节面形成的损伤,大部分为高能量垂直暴力所致,常造成胫骨远端干骺端及负重面的粉碎性骨折,且易合并严重的软组织损伤,由于存在骨与软组织的双重障碍,成为临床医生面临的难题。目前对于高能量Pilon骨折临床医生多采取分期治疗,但由于骨折的复杂性及患者个体的差异性,学者们对于其诊治方案并未形成统一认识。该文就高能量Pilon骨折分期治疗的发展及治疗原则进行综述,以期为临床医生制定个体化治疗方案提供参考依据,改善诊疗效果。

关键词： Pilon骨折创伤手术入路

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跗骨窦入路治疗跟骨关节内骨折研究进展

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国际骨科学杂志 2024年第3期45卷 162-165页

作者：孔维杰李晗郝海虎山西医科大学第三医院(山西白求恩医院、山西医学科学院、同济山西医院)骨科山西太原030032

跟骨骨折是跗骨骨折中最常见的类型,通常由垂直的高能量损伤引起,在跟骨骨折中跟骨关节内骨折更为常见。跗骨窦入路是跟骨骨折治疗的微创手术入路,该入路自被提出以来,越来越受关注。通过跗骨窦入路可以直接暴露跟骨关节,从而减小手术创... 详细信息

跟骨骨折是跗骨骨折中最常见的类型,通常由垂直的高能量损伤引起,在跟骨骨折中跟骨关节内骨折更为常见。跗骨窦入路是跟骨骨折治疗的微创手术入路,该入路自被提出以来,越来越受关注。通过跗骨窦入路可以直接暴露跟骨关节,从而减小手术创伤,降低术后并发症风险。尽管此入路有许多优点,但关于最佳手术时机存在一些争议。此外,在有限的手术切口下复位跟骨关节面可能会具有一定难度。手术治疗跟骨关节内骨折时,还需考虑内固定方法,不同类型的内固定方法各有利弊。该文就近年来跗骨窦入路治疗跟骨关节内骨折研究进展进行综述。

关键词：跗骨窦入路跟骨骨折手术时机复位技巧内固定类型

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Bright, photostable and long-circulating NIR-Ⅱ nanoparticles for whole-process monitoring and evaluation of renal transplantation

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National Science Review 2024年第2期11卷 207-220页

作者： Rongyuan Zhang Ping Shen Yu Xiong Tianjing Wu Gang Wang Yucheng Wang Liping Zhang Han Yang Wei He Jian Du Xuedong Wei Siwei Zhang Zijie Qiu weijie Zhang Zheng Zhao Ben Zhong Tang Clinical Translational Research Center of Aggregation-Induced Emission The Second Affiliated HospitalSchool of MedicineSchool of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen) Center for AIE Research Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and Engineering Shenzhen University School of Chemistry Xiangtan University HKUST-Shenzhen Research Institute Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science and Technology Department of Urology The First Affiliated Hospital of Soochow University AIE Institute

Kidney transplantation is the gold standard for the treatment of end-stage renal diseases(ESRDs). However,the scarcity of donor kidneys has caused more and more ESRD patients to be stuck on the waiting list for transplant surgery. Improving the survival rate for renal grafts is an alternative solution to the shortage of donor kidneys. Therefore, real-time monitoring of the surgical process is crucial to the success of kidney transplantation, but efficient methods and techniques are lacking. Herein, a fluorescence technology based on bright, photostable and long-circulating aggregation-induced emission(AIE) active NIR-II nano-contrast agent DIPT-ICF nanoparticles for the whole-process monitoring and evaluation of renal transplantation has been reported. In the aggregated state, DIPT-ICF exhibits superior photophysical properties compared with the commercial dyes IR-26 and IR-1061. Besides, the long-circulating characteristic of the AIE nano-contrast agent helps to achieve renal angiography in kidney retrieval surgery,donor kidney quality evaluation, diagnosing vascular and ureteral complications, and assessment of renal graft reperfusion beyond renovascular reconstruction, which considerably outperforms the clinically approved indocyanine green(ICG).

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MalFSM: Feature Subset Selection Method for Malware Family Classification

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Chinese Journal of Electronics 2023年第1期32卷 26-38页

作者： kong Zixiao XUE Jingfeng WANG Yong ZHANG Qian HAN weijie ZHU Yufen School of Computer Science and Technology Beijing Institute of Technology School of Space Information Space Engineering University

Malware detection has been a hot spot in cyberspace security and academic research. We investigate the correlation between the opcode features of malicious samples and perform feature extraction, selection and fusion by filtering redundant features, thus alleviating the dimensional disaster problem and achieving efficient identification of malware families for proper classification. Malware authors use obfuscation technology to generate a large number of malware variants, which imposes a heavy analysis burden on security researchers and consumes a lot of resources in both time and space. To this end, we propose the MalFSM framework. Through the feature selection method, we reduce the 735 opcode features contained in the Kaggle dataset to 16, and then fuse on metadata features(count of file lines and file size)for a total of 18 features, and find that the machine learning classification is efficient and high accuracy. We analyzed the correlation between the opcode features of malicious samples and interpreted the selected features. Our comprehensive experiments show that the highest classification accuracy of MalFSM can reach up to 98.6% and the classification time is only 7.76 s on the Kaggle malware dataset of Microsoft.

关键词： Malware classification Machine learning Feature selection Feature correlation

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