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Preparation of Exfoliated Low-density Polyethylene/Montmorillonite Nanocomposites Through Melt Extrusion

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Chemical Research in Chinese Universities 2006年第3期22卷 383-387页

作者： YANG hong-mei SONG Yi-hu xu Bo ZHENG Qiang Department of Polymer Science ＆ Engineering Key Laboratory of Macromolecule Synthesis and Functionalization of MOE Zhejiang University Hangzhou 310027 P. R. China

The effects of ethylene vinyl acetate copelymer （EVA） as a compatibilizer on the dispersion of organically modified montmorillonite（org-MMT） into low-density polyethylene（LDPE） during melt extrusion compounding were studied. The X-ray diffraction patterns reveal that as compared with LDPE, EVA can intercalate more easily into the interlay gallery of org-MMT when the composites contain a low org-MMT content. Exfoliated LDPE/org-MMT nanocompesites in the presence of an EVA compatibilizer could be prepared by using a two-step melt compounding technique with a twin-screw extruder.

关键词： Polyethylene Montmorillonite Nanocompesite Intercalation Exfoliation

Local Density of States Modulated by Strain in Marginally Twisted Bilayer Graphene

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Chinese Physics Letters 2022年第4期39卷 61-66页

作者： Jia-Jun Ma Zhen-Yu Wang Shui-Gang xu Yu-Xiang gao Yu-Yang Zhang Qing Dai Xiao Lin Shi-xuan Du Jindong Ren hong-Jun gao Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesChinese Academy of SciencesBeijing 100190China Key Laboratory for Quantum Materials of Zhejiang Province School of ScienceWestlake UniversityHangzhou 310024China Institute of Natural Sciences Westlake Institute for Advanced StudyHangzhou 310024China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China CAS Key Laboratory of Nanophotonic Materials and Devices CAS Key Laboratory of Standardization and Measurement for Nano-technologyNational Center for Nanoscience and TechnologyBeijing 100190China

In marginally twisted bilayer graphene,the Moirépattern consists of the maximized AB(BA)stacking regions,minimized AA stacking regions and triangular networks of domain *** we realize the strain-modulated electronic structures of marginally twisted bilayer graphene by scanning tunneling microscopy/spectroscopy and density functional theory(DFT)*** experimental data show four peaks near the Fermi energy at the AA *** calculations indicate that the two new peaks closer to the Fermi level may originate from the intrinsic heterostrain and the electric field implemented by back gate is likely to account for the observed shift of the four ***,the d I/d V map across Moirépatterns with different strain strengths exhibits a distinct appearance of the helical edge states.

关键词： twisted Fermi stacking

Modeling Garment Seam from a Single Image

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Journal of Computer Science & Technology 2018年第3期33卷 463-474页

作者： Chen-xu Zhang Xiao-Wu Chen hong-Yu Wu Bin Zhou State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing 100191 China

We propose an automatic garment seam modeling framework to create a garment model with the seam structure from a single image. In order to achieve this, a marked seam image database and parametric seam models have been set up. Given a real seam image, we first identify the type of the seam image based on our marked semn image database and the seam parameters are parsed automatically by our sewing thread estimation method. Second the seam initial model is generated through the pre-defined parametric seam models. A garment model with the seam structure is finally obtained based on the seam position infrmation which users have marked on the garment. Moreover. we verify the effectiveness of our method with numerous experiments.

关键词： image-based 3D modeling garment modeling garment seam

超声诊断胰腺占位性病变漏误诊原因及对策分析

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中华医学超声杂志（电子版） 2024年第5期21卷 517-521页

作者：高琼孙终霞张戈王敏徐子杭张佳藤蒋天安浙江大学医学院附属第一医院超声医学科浙江杭州310000 浙江大学癌症研究院浙江杭州310000

目的分析胰腺占位性病变超声漏误诊原因及对策。方法回顾性分析2021年1月至12月浙江大学医学院附属第一医院进行手术或穿刺胰腺占位性病变患者术前常规超声报告,以病理结果作为金标准,将病灶分为合格组(包括超声诊断与病理结果完全符合... 详细信息

目的分析胰腺占位性病变超声漏误诊原因及对策。方法回顾性分析2021年1月至12月浙江大学医学院附属第一医院进行手术或穿刺胰腺占位性病变患者术前常规超声报告,以病理结果作为金标准,将病灶分为合格组(包括超声诊断与病理结果完全符合以及超声仅提示“占位”或“建议进一步检查”的病例)、漏诊组(超声未发现胰腺占位,其他影像学检查诊断并进行穿刺或手术的病例)和误诊组(超声诊断胰腺占位,但不符合病理诊断的病例)。收集3组患者一般临床资料和影像学资料,采用t检验或χ^(2)检验比较合格组与漏诊组、误诊组年龄、性别、病灶最大径、病灶部位、超声操作医师年资和病理良恶性的差异。通过对超声科医师进行理论及操作培训同时建立会诊制度提高超声诊断符合率,统计2021年1月至12月超声诊断符合率,并采用χ^(2)检验比较上述措施实施前后(2021年上半年和下半年)超声诊断符合率的差异。结果纳入489例胰腺占位性病变(良性/恶性:99/390,男/女:259/230)。合格组428例,漏诊组26例,误诊组35例。漏诊组患者年龄大于合格组[(65.62±7.52)岁vs(60.49±12.70)岁],病灶最大径小于合格组[(2.69±1.03)cm vs(3.49±1.74)cm],诊断医师高年资医师占比低于合格组(15/26 vs 342/428),差异具有统计学意义(t=-2.033,P=0.043;t=2.316,P=0.021;χ^(2)=7.199,P=0.007);漏诊组与合格组患者性别、病灶部位及病理良恶性比较,差异均无统计学意义(P均>0.05)。漏诊组中18例病灶位于胰头部(其中11例位于钩突部),8例位于体尾部(其中6例位于尾部);5例病灶由于腹腔气体干扰显示不清晰。误诊组与合格组间患者年龄、性别、病灶部位、最大径、病理良恶性及诊断医师年资差异均无统计学意义(P均>0.05)。2021年1月至12月超声诊断胰腺占位性病变符合率分别为86.54%、86.96%、94.59%、88.89%、85.71%、68.42%、83.93%、92.86%、86.84%、94.12%、92.86%、93.02%。2021年下半年超声诊断符合率高于上半年(89.87%vs 85.50%),差异无统计学意义(P>0.05)。结论常规超声诊断胰腺占位性病变有局限性,患者年龄、病灶大小、病灶部位、医师年资都可能造成漏误诊,可以通过加强对医师的培训及完善会诊制度并结合其他检查来提高超声诊断符合率。

关键词：超声胰腺质量控制

High-Sensitive Glucose Biosensor Based on Ionic Liquid Doped Polyaniline/Prussian Blue Composite Film

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Chinese Journal of Chemical Physics 2015年第6期28卷 -页

作者： Yao Yao Shou-guo Wu Hai-hong xu Li-wen Wang Department of Chemistry University of Science and Technology of China Hefei 230026 China Clinical Laboratory Hefei Third People's Hospital Hefei 230022 China

The Prussian blue/ionic liquid-polyaniline/multiwall carbon nanotubes (PB/IL-PANI/MWNTs) composite film was fabricated by using cyclic voltammetry. The ion liquid acting as a lubricating agent, could enhance the electron delocalization degree and reduce the structural defects of the polyaniline. The surface morphology of the composite film revealed that the PB nanoparticles have smaller size than that in pure PB film. Due to the introduction of ion liquid, the PB/IL-PANI/MWNTs composite film showed wonderful synergistic effect which can remarkably enhance sensitivity, expand linear range and broaden acidic adaptability for hydrogen peroxide detection. The composite film demonstrated good stability in neutral solution contrast to pure PB film, with a linear range from 2.5 µmol/L to 0.5 mmol/L and a high sensitivity of 736.8 µA·(mmol/L)−1·cm−2 for H2O2 detection. Based on the composite film, an amperometric glucose biosensor was then fabricated by immobilizing glucose oxidase. Under the optimal conditions, the biosensor also exhibits excellent response to glucose with the linear range from 12.5 µmol/L to 1.75 mmol/L and a high sensitivity of 94.79 µA·(mmol/L)−1·cm−2 for H2O2. The detection limit was estimated 1.1 µmol/L. The resulting biosensor was applied to detect the blood sugar in human serum samples without any pretreatment, and the results were comparatively in agreement with the clinical assay.

关键词： Hydrogen peroxide Prussian blue Ionic liquid Glucose biosensor

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液压挖掘机液能回收再利用节能装置测控系统

液压与气动 2024年第1期48卷 100-107页

作者：王金凤周连佺蒋红旗杨成徐添江苏师范大学机电工程学院江苏徐州221116

液压挖掘机动臂下降重力势能和回转制动动能均以节流和溢流的形式转化为了油液的热能,严重影响整机能效,亟需提高液压挖掘机液压系统的效率。针对这一问题,提出了基于三腔蓄能器的挖掘机液能回收再利用的节能装置方案,可以回收挖掘机动... 详细信息

液压挖掘机动臂下降重力势能和回转制动动能均以节流和溢流的形式转化为了油液的热能,严重影响整机能效,亟需提高液压挖掘机液压系统的效率。针对这一问题,提出了基于三腔蓄能器的挖掘机液能回收再利用的节能装置方案,可以回收挖掘机动臂势能和回转制动动能,用于驱动动臂举升。首先,介绍了节能装置的工作原理。其次,设计并开发了节能装置的测控系统,采用CoDeSys编写了下位机控制器程序,直接控制节能装置的动作实现能量回收和再利用;运用C#语言开发了上位机程序进行节能装置电控系统和液压系统的模拟调试和数据监控,并实现了节能装置的远程无线通讯功能。试验结果表明:该测控系统实现了对插装阀开闭和比例节流阀开度的快速、精准控制;达到了对节能装置远程控制和数据实时采集的目标;节能装置的动臂势能回收效率为84.9%,动臂节能效率为52.8%,回转制动工况下的动能回收效率为41.1%。

关键词：节能装置测控系统能量回收再利用三腔蓄能器

Regularity of the Attractor for 3-D Complex Ginzburg-Landau Equation

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Acta Mathematicae Applicatae Sinica 2011年第2期27卷 289-302页

作者： Dong-long Li Bo-ling Guo xu-hong Liu Guangxi University of Technology Liuzhou 545006 China Institute of Applied Physics and Computational Mathematics Beijing 100088 China

In this paper, the existence of global attractor for 3-D complex Ginzburg Landau equation is considered. By a decomposition of solution operator, it is shown that the global attractor .Ai in Hi（Ω） is actually equal... 详细信息

关键词： Ginzburg-Landau equation regularity of global attractor

Study on Information Diffusion Analysis in Social Networks and Its Applications

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International Journal of Automation and computing 2018年第4期15卷 377-401页

作者： Biao Chang Tong xu Qi Liu En-hong Chen Anhui Province Key Laboratory of Big Data Analysis and Application School of Computer ScienceUniversity of Science and Technology of China

Due to the prevalence of social network services, more and more attentions are paid to explore how information diffuses and users affect each other in these networks, which has a wide range of applications, such as viral marketing, reposting prediction and social recommendation. Therefore, in this paper, we review the recent advances on information diffusion analysis in social networks and its applications. Specifically, we first shed light on several popular models to describe the information diffusion process in social networks, which enables three practical applications, i.e., influence evaluation, influence maximization and information source detection. Then, we discuss how to evaluate the authority and influence based on network structures. After that, current solutions to influence maximiza- tion and information source detection are discussed in detail, respectively. Finally, some possible research directions of information diffu- sion analysis are listed for further study.

关键词： Information diffusion influence evaluation influence maximization information source detection social network.

Effects of Photodynamic Therapy on Nav1.7 Expression in Spinal Dorsal Root Ganglion Neurons

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Current Medical Science 2022年第6期42卷 1267-1272页

作者： Dong-xu ZOU Xiao-zhen LI hong CAI Medical School of Chinese PLA Beijing100853China Department of Dermatology Air Force Medical CenterPLABeijing100142China

Objective The aim of this study was to examine the effects of photodynamic therapy(PDT)on the expression of Nav1.7 in spinal dorsal root ganglion(DRG)*** The primary DRG neurons from newborn SD rats were *** cells were identified by neuron-specific enolase immunofluorescence *** neurons were divided into four groups:control group,photosensitizer group,laser group,and PDT *** cell viability was detected by a cell counting kit-8(CCK8)***-PCR and Western blotting were used to determine the mRNA and protein expression levels of Nav1.7 in DRG *** The purity of the cultured primary DRG neurons was greater than 90%.Compared with the control group,no significant change was found in the cell viability of the photosensitizer group,while the viability in the laser group and the PDT group was significantly *** mRNA and protein expression levels of Nav1.7 were significantly greater in the laser group and the PDT group than in the control *** the same time,the mRNA and protein expression levels of Nav1.7 were greater in the laser group than in the PDT *** Both laser and PDT could upregulate the expression of Nav1.7 in DRG neurons,and the promoting effect might be related to the pain induced by clinical *** study provides a research basis for the use of laser and PDT to treat pain.A better understanding of the relationship between Nav1.7 and PDT can help clinicians better manage PDT-related pain.

关键词： photodynamic therapy pain dorsal root ganglion Nav1.7 laser