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A Study on the Impact of Chemical Structure on the Evolution of Aggregate Structure in Fiber-shaped High Density Polyethylene Vitrimer

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Chinese Journal of Polymer Science 2024年第10期42卷 1557-1565,I0013页

作者： Bing Wang yuan-Chu Gao Hai Wang Hui Niu State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian116024China

Vitrimers have emerged as a prominent research area in the field of polymer *** of the studies have focused on synthesizing polymers with versatile dynamic crosslinking structures,while the impact of chemical structure on aggregate structure of vitrimers,particularly during polymer processing,remains insufficiently *** present study employed commercial maleic anhydride-grafted-high density polyethylene(M-g-HDPE)as the matrix and hexanediol as the crosslinker to facilely obtain fiber-shaped HDPE vitrimers through a reaction extrusion and post-drawing *** chemical structure characterization,morphology observation,thermal and mechanical properties investigation,as well as aggregate structure analysis,this work revealed the influence of dynamic bonds on the formation of aggregate structures during fiber-shaped vitrimers processing.A small amount of dynamic bonds in HDPE restricts the motion of PE chain during melt-extruding and post-drawing,resulting in a lower orientation of the PE ***,lamellar growth and fibril formation during post-drawing at high temperature are enhanced to some extent due to the competition between dynamic bond and chain *** uneven morphology of fibershaped HDPE vitrimers can be attributed to the stronger elastic effect brought by dynamic bonding,which plays a more dominant role in determining the mechanical properties of fiber-shaped vitrimers compared to aggregate *** Vitrimers have emerged as a prominent research area in the field of polymer *** of the studies have focused on synthesizing polymers with versatile dynamic crosslinking structures,while the impact of chemical structure on aggregate structure of vitrimers,particularly during polymer processing,remains insufficiently *** present study employed commercial maleic anhydride-grafted-high density polyethylene(M-g-HDPE)as the matrix and hexanediol as the crosslinker to facilely obtain fiber-shap

关键词： High density polyethylene vitrimer Fiber-shaped Aggregate structures Transesterification reaction

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乳腺颗粒细胞瘤临床病理观察并文献复习

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中国组织化学与细胞化学杂志 2017年第6期26卷 589-592页

作者：徐励袁静萍袁修学武汉大学人民医院病理科武汉430060 武汉科技大学基础医学院武汉430065

目的探讨乳腺颗粒细胞瘤(granular cell tumor of the breast,GCTB)的临床病理学特征、诊断、鉴别诊断、治疗与预后。方法应用光学显微镜及免疫组织化学方法分析1例GCTB病例的临床病理特点及免疫表型,并复习相关文献。结果患者女性,31岁... 详细信息

目的探讨乳腺颗粒细胞瘤(granular cell tumor of the breast,GCTB)的临床病理学特征、诊断、鉴别诊断、治疗与预后。方法应用光学显微镜及免疫组织化学方法分析1例GCTB病例的临床病理特点及免疫表型,并复习相关文献。结果患者女性,31岁,无明显诱因出现左乳无痛性肿块10天。术中快速冰冻切片镜下见瘤细胞体积大,成巢状或条索状排列,其间有纤维脂肪组织分隔,似浸润性生长,与乳腺癌极为相似,但胞质内可见丰富的嗜酸性颗粒,罕见核分裂象和核异型性,快速冰冻切片诊断为左乳良性病变。冰冻后石蜡切片镜下见瘤细胞间边界不清,呈实性巢片状排列,瘤细胞呈圆形、椭圆形或多边形,胞核小,圆形或卵圆形,核仁明显,胞质粗颗粒状、嗜酸性,未见明显核分裂象及核异型性。免疫组织化学显示肿瘤细胞S-100阳性,CD68阳性,广谱细胞角蛋白(Pan Cytokeratin,PCK)阴性,Ki-67增殖指数约3%。结合组织学特征及免疫组织化学诊断为乳腺颗粒细胞瘤。结论乳腺颗粒细胞瘤是一种罕见的软组织肿瘤,虽然极少数具有恶性倾向,但是从临床特征、影像学检查上都极易误诊为乳腺癌,加大了诊断难度。依据临床病理组织学特点及免疫组织化学可准确诊断。

关键词：乳腺颗粒细胞瘤鉴别诊断免疫组织化学

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Dual-curvilinear beam enabled tunable manipulation of high-and low-refractive-index particles

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Photonics Research 2024年第7期12卷 1427-1436页

作者： ZHENG yuan CHENCHEN ZHANG yuan GAO WENXIANG YAN XIAN LONG ZHI-CHENG REN XI-LIN WANG JIANPING DING HUI-TIAN WANG National Laboratory of Solid State Microstructures and School of Physics Nanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China Collaborative Innovation Center of Solid-State Lighting and Energy-Saving Electronics Nanjing 210093China

We present an innovative approach for the simultaneous agile manipulation of high-refractive-index(HRI) and low-refractive-index(LRI) particles. Our method involves introducing a dual-curvilinear optical vortex beam(DC-OVB) generated by superimposing a pair of curved beams: HRI and LRI particles are controlled by the bright curve and the dark channel between the two curves, respectively. The proposed DC-OVB provides customizable motion paths and velocities for both LRI and HRI particles. Each curve of the DC-OVB can support a distinct orbital flow density(OFD), enabling the application of torques to HRI and LRI particles, guiding them to orbit along specified trajectories and prompting them to execute various curvilinear motions simultaneously,including curvilinear movement, revolution, and rotation.

关键词： tunable refractive beam

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Enhancing whole yeast genome rearrangements through multiple LoxPsym sequences

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Science China(Life Sciences) 2024年第9期67卷 2045-2047页

作者： Bing-Zhi Li Ying-Jin yuan Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(Ministry of Education) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Frontiers Research Institute for Synthetic Biology Tianjin UniversityTianjin 300072China

Genomic rearrangements play a significant role in disease,evolution,and tumorigenesis(Mani and Chinnaiyan,2010).While single nucleotide polymorphisms(SNPs)and small insertions/deletions contribute substantially to gen... 详细信息

关键词： insertion sequences

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Energy-Efficient Driving Strategy for High-Speed Trains with Considering the Checkpoints

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Chinese Journal of Electronics 2024年第3期33卷 847-858页

作者： Zixuan ZHANG yuan CAO Shuai SU State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University School of Electronic and Information Engineering Beijing Jiaotong University National Engineering Research Center of Rail Transportation Operation and Control System Beijing Jiaotong University Frontiers Science Center for Smart High-speed Railway System Beijing Jiaotong University

With rising energy prices and concerns about environmental issues,energy-efficient driving strategies(EEDS) for high-speed trains have received a substantial amount of *** particular,energy-saving schemes play a huge role in reducing the energy and operating costs of *** article studies the EEDS of high-speed trains at a given time.A well-posed model is formulated,in which the constraints of the checkpoints,in addition to the speed limits,vehicle dynamics,and discrete control throttle,are first *** a given control sequence,the Karush-Kuhn-Tucker(KKT) conditions are used to obtain the necessary conditions for an *** to several key equations of the necessary conditions,the checkpoint constraints are *** case studies are conducted based on the data of the Beijing-Shanghai high-speed line to illustrate the effectiveness of the proposed approach.

关键词： Energy consumption Costs Simulation Mathematical models Energy efficiency Vehicle dynamics Optimization

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不同种质资源南瓜苗期耐低钾性鉴定及筛选

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植物生理学报 2023年第1期59卷 231-245页

作者：李新峥李道涵申长卫袁敬平刘振威河南科技学院园艺园林学院河南新乡453003 河南科技学院资源与环境学院河南新乡453003

为明确不同种质资源南瓜苗期耐低钾特性,筛选耐低钾南瓜种质资源。本研究以39个南瓜种质资源为材料,采用水培法,分析适钾(6.0 mmol·L^(-1)K^(+))和低钾(0.1 mmol·L^(-1)K^(+))处理下南瓜苗期的12个生长指标和耐低钾系数,并利用多元分... 详细信息

为明确不同种质资源南瓜苗期耐低钾特性,筛选耐低钾南瓜种质资源。本研究以39个南瓜种质资源为材料,采用水培法,分析适钾(6.0 mmol·L^(-1)K^(+))和低钾(0.1 mmol·L^(-1)K^(+))处理下南瓜苗期的12个生长指标和耐低钾系数,并利用多元分析方法对不同南瓜种质资源耐低钾能力进行综合评价。结果表明:除根系干重和根冠比外,不同种质资源南瓜的其他指标变异系数较大。通过主成分分析将12个指标转化成3个相互独立的综合指标,其累计贡献率达91.12%。利用南瓜苗期性状指标和主成分分析结果将地上部鲜重和根系钾积累量作为南瓜苗期耐低钾性评价指标,并基于热图的分层聚类将不同南瓜种质资源分为3类。采用隶属函数分析和聚类分析将39个南瓜种质资源进一步划分为4个类群:耐低钾型、中等耐低钾型、偏弱耐低钾型和低钾敏感型,分别占总南瓜种质资源的5.13%、33.33%、23.08%和38.46%。综合分析来看,TMG0091和CM0091为耐低钾型南瓜, 14个品种为低钾敏感型南瓜。

关键词：南瓜耐低钾性种质资源苗期主成分分析

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肝脏软组织软骨瘤1例

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中华病理学杂志 2022年第2期51卷 147-149页

作者：王梦萍夏良兵严丹丹袁静萍吕鸣武汉大学人民医院病理科武汉430060 湖北省监利县人民医院病理科荆州433300 湖北省英山县人民医院消化内科黄冈438700

软组织软骨瘤(STC)是一种由分化成熟的透明软骨组织组成的良性肿瘤。大多发生于手足部位的浅表软组织内,位于肝脏者极为罕见。本文报道1例肝脏STC,镜下观察该例患者肿瘤组织为分化良好的软骨组织,软骨细胞细胞核小而扁平,未见病理性核... 详细信息

软组织软骨瘤(STC)是一种由分化成熟的透明软骨组织组成的良性肿瘤。大多发生于手足部位的浅表软组织内,位于肝脏者极为罕见。本文报道1例肝脏STC,镜下观察该例患者肿瘤组织为分化良好的软骨组织,软骨细胞细胞核小而扁平,未见病理性核分裂象,肿瘤周围可见由纤维结缔组织形成的假包膜,可见炎性细胞浸润。免疫组织化学表型:S-100蛋白广泛阳性,CD34阴性,Ki-67阳性指数<1%。STC临床表现不明显,依据临床病理组织学特征及免疫组织化学表型可确诊,局部手术切除为其首选治疗方式。

关键词：纤维结缔组织透明软骨阳性指数病理性核分裂炎性细胞浸润免疫组织化学假包膜软骨组织

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An Efficient Radar Detection Method of Maneuvering Small Targets

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Journal of Beijing Institute of Technology 2024年第1期33卷 1-8页

作者： Hongchi Zhang yuan Feng Shengheng Liu School of Information and Electronics Beijing Institute of Technology and Beijing Key Laboratory of Fractional Signals and SystemsBeijing 100081China School of Information Science and Engineering Southeast UniversityNanjing 210096China

Detection of maneuvering small targets has always been an important yet challenging task for radar signal *** primary reason is that target variable motions within coherent processing interval generate energy migrations across multiple resolution bins,which severely deteriorate the parameter estimation performance.A coarse-to-fine strategy for the detection of maneuvering small targets is *** of small points segmented coherently is performed first,and then an optimal inter-segment integration is utilized to derive the coarse estimation of the chirp *** fractional Fourier transform(FrFT)is then employed to refine the coarse estimation at a significantly reduced computational *** results verify the proposed scheme that achieves an efficient and reliable maneuvering target detection with-16dB input signal-to-noise ratio(SNR),while requires no exact a priori knowledge on the motion parameters.

关键词： small target chirp sparse fractional Fourier transform(FrFT)

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Stem Cell Transplantation Represents a New Strategy for the Treatment of Epilepsy

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Neuroscience Bulletin 2024年第5期40卷 673-676页

作者： yuan Zhou Yi Wang Lin Yang Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province School of Pharmaceutical Sciences and First Affiliated HospitalZhejiang Chinese Medical UniversityHangzhou310053China Zhejiang Rehabilitation Medical Center Department The Third Affiliated HospitalZhejiang Chinese Medical UniversityHangzhou310013China

Epilepsy is a neurological disorder characterized by faulty neuronal synchronization and repeated *** balance between glutamatergic excitatory neurons and gammaaminobutyric acid inhibitory neurons is critical for opti... 详细信息

关键词： epilepsy Transplantation Strategy

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6G New Multiple Access Technology

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China Communications 2024年第1期21卷 I0002-I0005页

作者： Yifei yuan Yongpeng Wu Lei Wang Zhifeng yuan Wei Bai yuanwei Liu Tsinghua University in China Carnegie Mellon University USA Wuhan University WuhanChina Southeast University NanjingChina Carleton University OttawaONCanada Nanjing University of Post and Telecommunications Shanghai Jiaotong University ShanghaiChina the School of Electronic Engineering and Computer Science Queen Mary University of London

As a basic technology at physical layer of mobile communications,non-orthogonal multiple access has been attracting wide attention across the academia and the *** the standardization of the fifth-generation(5G)of mobile communications,3GPP conducted preliminary study on non-orthogonal multiple access without reaching the consensus to standardize the technology.

关键词： technology Access attracting

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