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Assessment of the Mechanical Properties of Carbon-Fiber Heating Cables in Snow and Ice Melting Applications

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Fluid Dynamics & Materials Processing 2023年第9期19卷 2267-2288页

作者： zhiyong Yang Jiacheng zhang Henglin Xiao zhi Chen Tian Bao Yin Liu School of Civil Engineering and Environment Hubei University of TechnologyWuhan430068China Xiangyang Industrial Institute of Hubei University of Technology Xiangyang441100China

The use of carbon-ﬁber heating cables(CFHC)to achieve effective melting of snow and ice deposited on roads is a method used *** this study,tensile and compressive tests have been conducted to analyze the mechan-ical properties of the CFHC and assess whether the maximum tensile and compressive strengths can meet the pavement design speciﬁ*** order to study the aging produced by multiple cycles of heating and cooling,in particular,the CFHC was repeatedly heated in a cold chamber with an ambient temperature ranging between-20℃ and+40℃.Moreover,to evaluate how the strength of the pavement is affected by its presence,the CFHC was embedded at different depths and concrete blocks with different curing ages were subjected to relevant com-pression and splitting tensile *** simulations based on the ANSYS software have also been performed and compared with the outcomes of the static loading *** results show that the CFHC embedded in the concrete does not affect the compressive splitting tensile strengths of the ***,the CFHC meets the conditions required for continued use in road ice melting applications.

关键词： Carbon fiber cable snow and ice melting concrete pavement compressive strength splitting tensile strength

An Anti-Physical Attack Scheme of ARX Lightweight Algorithms for IoT Applications

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Computer Systems Science & Engineering 2023年第7期46卷 389-402页

作者： Qiang zhi Xiang Jiang Hangying zhang Zhengshu Zhou Jianguo Ren Tong Huang School of Computer Science and Technology Jiangsu Normal UniversityXuzhou221116China State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua UniversityBeijing100084China Graduate School of Informatics Nagoya UniversityNagoya4648601Japan College of Chemical Engineering Nanjing Tech UniversityNanjing211816China

The lightweight encryption algorithm based on Add-Rotation-XOR(ARX)operation has attracted much attention due to its high software affinity and fast operation ***,lacking an effective defense scheme for physical attacks limits the applications of the ARX *** critical challenge is how to weaken the direct dependence between the physical information and the secret key of the algorithm at a low *** study attempts to explore how to improve its physical security in practical application scenarios by analyzing the masking countermeasures of ARX algorithms and the leakage ***,we specify a hierarchical security framework by quantitatively evaluating the indicators based on side-channel ***,optimize the masking algorithm to achieve a trade-off balance by leveraging the software-based local masking strategies and non-full-round masking ***,refactor the assembly instruction to improve the leaks by exploring the leakage cause at assembly *** illustrate the feasibility of the proposed scheme,we further conducted a case study by designing a software-based masking method for *** experimental results show that the proposed method can effectively weaken the impact of physical attacks.

关键词： IoT security lightweight encryption anti-physical attack ARX algorithms

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一种多角度零件加工夹具的设计

南方农机 2024年第5期55卷 153-156页

作者：张天坤郭崇斌孙旭阳支铁山西安交通工程学院陕西西安710300

【目的】设计一种可以实现一次装夹多位置、多角度加工的可调节式专用机床夹具,提高机床加工的自动化程度,进而提高企业生产效率。【方法】以卧式镗床加工套筒零件左右端面工序为例,设计专用卧式镗床夹具,可实现工件定位夹紧后的多角度... 详细信息

【目的】设计一种可以实现一次装夹多位置、多角度加工的可调节式专用机床夹具,提高机床加工的自动化程度,进而提高企业生产效率。【方法】以卧式镗床加工套筒零件左右端面工序为例,设计专用卧式镗床夹具,可实现工件定位夹紧后的多角度旋转。在加工完一个端面后,无需重新装夹定位,可通过手摇杆、轴承等部件带动工件旋转至另一端面进行钻孔加工。同时,所设计夹具设计了由夹具头、手摇杆、轴承等部件组成的多角度调节机构,由电机、偏心轮以及滑轨组成的沿机床主轴垂直方向角度可调的角度微调节机构,通过上述各机构使得刀具在加工零件时可实现一次装夹多位置、多角度加工。【结果】显著缩短了加工过程中的辅助工时,进而提高了生产效率。

关键词：夹具设计专用夹具工艺分析

Gold nanoparticles/carbon nanotubes composite microspheres for catalytic reduction of 4-nitrophenol

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Chinese Chemical Letters 2016年第6期27卷 843-846页

作者： Sheng Liu Xiao-Lin Zhou Meng-Meng zhang Xuan Lu Yu-Jun Qin Pu zhang zhi-Xin Guo Department of Chemistry Renmin University of China

The layer-by-layer assembly of polyethyleneimine and carbon nanotubes is carried out through the electrostatic interactions on colloidal polystyrene templates. The successful spherical growth of polyethyleneimine/carbon nanotube multilayers could be investigated by SEM. The subsequent in situ preparation and deposition of gold nanoparticles on the core–shell composites could yield novel microsphere complexes, which are characterized by SEM, TEM, EDX and XRD. The functional hierarchical microspheres with gold nanoparticles exhibit good catalytic activity in the reaction of reducing 4-nitrophenol to 4-aminophenol.

关键词： Carbon nanotubes Gold nanoparticles Microsphere Catalytic activity

Simultaneous determination of seven prohibited substances in cosmetic products by liquid chromatography-tandem mass spectrometry

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Chinese Chemical Letters 2013年第6期24卷 509-511页

作者： Cai-Sheng Wu Ying Jin Jin-Lan zhang Yan Ren zhi-Xin Jia Institute of Materia Medica Chinese Academy of Medical Sciences & Peking Union Medical College

In this paper,we developed and validated a simple,sensitive,and selective high-performance liquid chromatography-tandem mass spectrometry（HPLC-MS/MS） method to identify and measure the following prohibited substances that may be found in cosmetic products：minoxidil,hydrocortisone, spironolactone,estrone,canrenone,triamcinolone acetonide and *** separation was performed on a Waters Symmetry C18（100 mm×2.1 mm,3.5μm particle size） with a gradient elution system composed of 0.2%（v/v） formic acid aqueous solution and methanol containing 0.2%（v/v） formic acid at a flow rate of 0.3 mL/*** substances were detected using a triple quadrupole mass spectrometer in the multiple reaction monitoring mode with an electrospray ionization *** of the calibration curves showed good linearity（r 〉 0.999） within the tested concentration *** limit of detection was 〈25 *** relative standard deviations for intraday precision for each of the prohibited substances were 〈3.5%at two concentration levels（2μg/g,10μg/g）. The relative recovery rate for each of the prohibited substances ranged from 91.8%to 111%at three concentration levels（0.1μg/g,2μg/g,10μg/g）,including the limit of *** conclusion,we have developed and validated a method that can identify seven prohibited substances in cosmetic products.

关键词： High-performance liquid chromatographytandem mass spectrometry(HPLC-MS/MS) Cosmetic products Prohibited substances Minoxidil Steroids

F-box only protein 2 exacerbates non-alcoholic fatty liver disease by targeting the hydroxyl CoA dehydrogenase alpha subunit

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World Journal of Gastroenterology 2023年第28期29卷 4433-4450页

作者： zhi Liu Ning-Yuan Chen Zhao zhang Sai Zhou San-Yuan Hu Department of General Surgery Qilu Hospital of Shandong UniversityJinan 250012Shandong ProvinceChina Department of General Surgery Shandong Provincial Qian Foshan HospitalShandong UniversityJinan 250014Shandong ProvinceChina Department of General Surgery Shandong First Medical University&Shandong Academy of Medical SciencesJinan 250117Shandong ProvinceChina

BACKGROUND Non-alcoholic fatty liver disease(NAFLD)is a major health burden with an increasing global ***,the unavailability of knowledge underlying NAFLD pathogenesis inhibits effective preventive and therapeutic *** To explore the molecular mechanism of *** Whole genome sequencing(WGS)analysis was performed on liver tissues from patients with NAFLD(n=6)and patients with normal metabolic conditions(n=6)to identify the target genes.A NAFLD C57BL6/J mouse model induced by 16 wk of high-fat diet feeding and a hepatocyte-specific F-box only protein 2(FBXO2)overexpression mouse model were used for in vivo *** transfection,co-immunoprecipitation-based mass spectrometry assays,and ubiquitination in HepG2 cells and HEK293T cells were used for in vitro *** A total of 30982 genes were detected in WGS analysis,with 649 up-regulated and 178 *** of FBXO2,an E3 ligase,was upregulated in the liver tissues of patients with ***-specific FBXO2 overexpression facilitated NAFLD-associated phenotypes in *** of FBXO2 aggravated odium oleate(OA)-induced lipid accumulation in HepG2 cells,resulting in an abnormal expression of genes related to lipid metabolism,such as fatty acid synthase,peroxisome proliferator-activated receptor alpha,and so *** contrast,knocking down FBXO2 in HepG2 cells significantly alleviated the OA-induced lipid accumulation and aberrant expression of lipid metabolism *** hydroxyl CoA dehydrogenase alpha subunit(HADHA),a protein involved in oxidative stress,was a target of FBXO2-mediated ***2 directly bound to HADHA and facilitated its proteasomal degradation in HepG2 and HEK293T *** with HADHA alleviated lipid accumulation caused by FBXO2 overexpression in HepG2 *** FBXO2 exacerbates lipid accumulation by targeting HADHA and is a potential therapeutic target for NAFLD。

关键词： F-box only protein 2 Nonalcoholic fatty liver disease The hydroxyl CoA dehydrogenase alpha subunit Liver steatosis Ubiquitination Lipid accumulation

Steering quantum nonlocalities of quantum dot system suffering from decoherence

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Chinese Physics B 2022年第9期31卷 185-195页

作者： Huan Yang Ling-Ling Xing zhi-Yong Ding Gang zhang Liu Ye School of Electrical and Photoelectronic Engineering West Anhui UniversityLu'an 237012China Key Laboratory of Functional Materials and Devices for Informatics of Anhui Higher Education Institutes Fuyang Normal UniversityFuyang 236037China School of Physics and Optoelectronics Engineering Anhui UniversityHefei 230601China

The important applications of quantum dot system are to implement logic operations and achieve universal quantum computing based on different quantum ***,we characterize the quantum steering,Bell nonlocality,and nonlocal advantage of quantum coherence(NAQC)of quantum dot system suffering nonunital and unital *** results reveal that quantum steering,Bell nonlocality,and NAQC can display the traits of dissipation,enhancement,and *** can achieve the detections of quantum steering,Bell nonlocality,and NAQC of quantum dot system in different *** these quantum nonlocalities,NAQC is the most fragile,and it is most easily influenced by different system ***,considering quantum dot system coupling with amplitude damping channel and phase damping channel,these quantum nonlocalities degenerate with the enlargement of the channel parameters t andΓ.Remarkably,measurement reversal can effectively control and enhance quantum steering,Bell nonlocality,and NAQC of quantum dot system suffering from decoherence,especially in the scenarios of the amplitude damping channel and strong operation strength.

关键词： quantum nonlocalities quantum dot system decoherence steering

Non-decoloured In-gel Digestion of Coomassie Blue-stained Proteins

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Chemical Research in Chinese Universities 2003年第4期19卷 399-403页

作者： zhang Guo-an BAO Hui-min FAN Hui-zhi YANG Peng-yuan Department of Chemistry Fudan UniversityShanghai 200433P.R.China

A simplified method is presented for tryptic digestion of Coomassie brilliant blue(CBB)-stained proteins in polyacrylamide gels. Compared with conventional methods, the proposed method does not require a removal of the dye before digestion, and is thus faster and saves a lot of labor. The resulted digest can be analyzed by either RPLC/ESIMS or MALDI MS for identification of the protein in a conventional way. Model studies with bovine serum albumin(BSA) showed that 50 ng of the protein could be routinely identified. The simplified procedure displays a tendency to produce more incompletely cleaved peptides, which is favorable for improving the sequence coverage.

关键词： In-gel digestion Polyacrylamide gel electrophoresis Coomassie brilliant blue Mass spectrometry

532 nm响应增强的AlGaAs光电阴极

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物理学报 2024年第11期73卷 368-376页

作者：王东智张益军李诗曼童泽昊唐嵩石峰焦岗成程宏昌富容国钱芸生曾玉刚南京理工大学电子工程与光电技术学院南京210094 微光夜视技术重点实验室西安710065 中国科学院长春光学精密机械与物理研究所长春130033

AlGaAs光电阴极具有响应速度快和光谱响应范围可调的特性,可被应用于水下光通信领域.为了解决AlGaAs发射层较低的光吸收限制其量子效率提高的问题,利用分布式布拉格反射镜(DBR)结构对特定波长光的反射作用,将透过光重新反射回发射层进... 详细信息

AlGaAs光电阴极具有响应速度快和光谱响应范围可调的特性,可被应用于水下光通信领域.为了解决AlGaAs发射层较低的光吸收限制其量子效率提高的问题,利用分布式布拉格反射镜(DBR)结构对特定波长光的反射作用,将透过光重新反射回发射层进一步提高吸收率,从而增强阴极在532 nm波长处的响应能力.通过求解一维连续性方程,建立了具有DBR结构的AlGaAs光电阴极光谱响应模型.采用时域有限差分法,分析了DBR结构中子层周期对数、子层材料以及发射层、缓冲层厚度对发射层吸收率的影响,对比了有无DBR结构AlGaAs光电阴极的光吸收分布.结果表明,周期对数为20、子层材料为Al_(0.7)Ga_(0.3)As/AlAs的DBR结构对532 nm光的反射效果最优.基于该DBR结构,发射层和缓冲层厚度分别为495 nm和50 nm时,发射层对532 nm光具有最佳吸收率.通过对外延生长的AlGaAs光电阴极进行激活实验,结果表明具有DBR结构的AlGaAs光电阴极在532 nm波长处的光谱响应率相比无DBR结构的AlGaAs光电阴极光谱响应率提升了约1倍.

关键词： AlGaAs光电阴极分布式布拉格反射镜光谱响应光吸收