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Two-terminal self-rectifying optoelectronic synaptic devices with largest-dynamic-range updates

APPLIED MATERIALS TODAY 2023年 30卷

作者： Huang, Wen Hang, Pengjie Xia, xuwen Li, Bin Li, Biao Kan, Chenxia zhang, Huixing Zhu, Chen Wang, Chenhao Zhu, Xiaodong Yang, Deren Pi, Xiaodong Yu, Xuegong Li, Xing'ao Nanjing Univ Posts & Telecommun New Energy Technol Engn Lab Jiangsu Provence 9 Weiyuan Rd Nanjing 210023 Peoples R China Nanjing Univ Posts & Telecommun Sch Sci 9 Weiyuan Rd Nanjing 210023 Peoples R China Zhejiang Univ State Key Lab Silicon Mat Hangzhou 310027 Peoples R China Nanjing Univ Posts & Telecommun Coll Elect & Opt Engn Nanjing 210023 Peoples R China Nanjing Univ Posts & Telecommun Coll Microelect Nanjing 210023 Peoples R China Zhejiang Univ Sci & Technol Sch Sci Hangzhou 310027 Peoples R China

Two-terminal optoelectronic synaptic devices have attracted increasing attention owing to their simplicity of structures, which facilitate the device integration in neuromorphic computing systems. However, synaptic-weight updates and self-rectifying properties in two-terminal optoelectronic synaptic devices are inferior. Here, we fabricate two-terminal optoelectronic synaptic devices in accordance with the hybrid structure of optically active layers MAPbI(3) and electron transport layers (ETLs) SnO2 in an n-i-p planar system, where MAPbI3 and SnO2 are used for generating and trapping carriers, respectively. Synaptic functionalities such as excitatory post-synaptic current (EPSC), paired-pulse facilitation (PPF), spike-number dependent plasticity (SNDP), and spike-rate dependent plasticity (SRDP) are all successfully mimicked without external bias. These synaptic devices possess self-rectifying properties with a highest ratio of similar to 0.3 x 10(3) and their synaptic weight exhibits largest-dynamic-range updates of 14.3 within 14 seconds among the reported two-terminal optoelectronic synaptic devices. Furthermore, the spike-number tunability of EPSC in the synaptic devices leads to the realization of straight running of agrimotor driverless technology. Results dramatically promote the development of two-terminal optoelectronic synaptic devices in neuromorphic computing.

关键词： Two-terminal optoelectronic synaptic devices SnO2 MAPbI(3) Self-rectifying Synaptic-weight updates

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体素内不相干运动的扩散加权像在肾病中的研究进展

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中华介入放射学电子杂志 2019年第2期7卷 155-159页

作者：黄晓霞叶裕丰张徐雯黄晨冯惠岗黄益陈汉威暨南大学第一附属医院(华侨医院)放射影像科广州510632 番禺中心医院放射影像科广州510000 番禺中心医院微创介入科广州510000

传统扩散加权成像(DWI)对脑部及腹腔脏器病变具有诊断功能,对肾脏等具有丰富微循环组织的病变诊断仍有局限性。体素内不相干运动的扩散加权像(IVIM-DWI)通过分离作用弥补了DWI的不足,对肾功能的评估和慢性肾病及肿瘤性肾病的诊断起影像... 详细信息

传统扩散加权成像(DWI)对脑部及腹腔脏器病变具有诊断功能,对肾脏等具有丰富微循环组织的病变诊断仍有局限性。体素内不相干运动的扩散加权像(IVIM-DWI)通过分离作用弥补了DWI的不足,对肾功能的评估和慢性肾病及肿瘤性肾病的诊断起影像支持作用。本文就IVIM-DWI在临床上的运用及其原理进行详细的阐述。

关键词：体素内不相干运动的扩散加权像肾病肾功能试验影像学综述

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《竖向分布钢筋不连接装配整体式混凝土剪力墙结构技术规程》(T/CECS 795—2021)介绍

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建筑结构 2023年第5期53卷 1-6,35页

作者：顾祥林肖绪文亓立刚张士前杨起廖显东李厂同济大学土木工程学院建筑工程系上海200092 中国建筑股份有限公司北京100029 中国建筑第八工程局有限公司上海200112

重点介绍了中国工程建设标准化协会标准《竖向分布钢筋不连接装配整体式混凝土剪力墙结构技术规程》(T/CECS 795—2021)编制的基本情况,阐述了该技术规程的特色和主要内容。该技术规程中对竖向分布钢筋不连接装配整体式剪力墙结构(SGBL... 详细信息

重点介绍了中国工程建设标准化协会标准《竖向分布钢筋不连接装配整体式混凝土剪力墙结构技术规程》(T/CECS 795—2021)编制的基本情况,阐述了该技术规程的特色和主要内容。该技术规程中对竖向分布钢筋不连接装配整体式剪力墙结构(SGBL装配整体式剪力墙结构)给出了准确定义。从理论、技术、软件三个角度总结了SGBL装配整体式剪力墙结构的先进性和科学性,阐述了该结构的可协同性及可操作性,详细解释了SGBL装配整体式剪力墙结构的结构构成、构件设计、连接与构造措施等,并对所涉及的构件生产、施工和验收流程作了详细说明,突出强调了坐浆施工及边缘构件施工相关的操作要求,为广大工程人员更好理解该技术规程提供参考。

关键词： SGBL装配整体式剪力墙技术规程竖向分布钢筋不连接坐浆

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Sequentially Triggered Bacterial Outer Membrane Vesicles for Macrophage Metabolism Modulation and Tumor Metastasis Suppression

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ACS NANO 2021年第8期15卷 13826-13838页

作者： Guo, Qin Li, xuwen Zhou, Wenxi Chu, Yongchao Chen, Qinjun zhang, Yiwen Li, Chao Chen, Hongyi Liu, Peixin Zhao, Zhenhao Wang, Yu Zhou, Zheng Luo, Yifan Li, Chufeng You, Haoyu Song, Haolin Su, Boyu zhang, Tongyu Sun, Tao Jiang, Chen Fudan Univ Sch Pharm Dept Pharmaceut Key Lab Smart Drug DeliveryMinist EducState Key Shanghai 201203 Peoples R China

Metabolic interactions between different cell types in the tumor microenvironment (TME) often result in reprogramming of the metabolism to be totally different from their normal physiological processes in order to support tumor growth. Many studies have attempted to inhibit tumor growth and activate tumor immunity by regulating the metabolism of tumors and other cells in TME. However, metabolic inhibitors often suffer from the heterogeneity of tumors, since the favorable metabolic regulation of malignant cells and other cells in TME is often inconsistent with each other. Therefore, we reported the design of a pH-sensitive drug delivery system that targets different cells in TME successively. Outer membrane vesicles (OMVs) derived from Gram-negative bacteria were applied to coload paclitaxel (PTX) and regulated in development and DNA damage response 1 (Redd1)-siRNA and regulate tumor metabolism microenvironment and suppress tumor growth. Our siRNA@M-/PTX-CA-OMVs could first release PTX triggered by the tumor pH (pH 6.8). Then the rest of it would be taken in by M2 macrophages to increase their level of glycolysis. Great potential was observed in TAM repolarization, tumor suppression, tumor immune activation, and TME remolding in the triple-negative breast cancer model. The application of the OMV provided an insight for establishing a codelivery platform for chemical drugs and genetic medicines.

关键词： bacterial OMVs pH sensitive TAM polarization immune therapy cancer treatment

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HKUST-1负载磷钨酸选择性合成乙二醇单叔丁基醚

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精细化工 2022年第7期39卷 1411-1418页

作者：马德亮蒙旭雯汤吉海张竹修崔咪芬乔旭南京工业大学化工学院江苏南京211800 南京工业大学材料化学工程国家重点实验室江苏南京211800

采用一锅法制备了HKUST-1负载磷钨酸(HPW)(HPW@HKUST-1),采用XRD、SEM、EDS、BET、ICP、吡啶红外(Py-IR)、酸碱滴定对其进行了表征。评价了HPW@HKUST-1作为催化剂用于异丁烯(IB)与乙二醇(EG)选择性醚化合成乙二醇单叔丁基醚(EGME)的催... 详细信息

采用一锅法制备了HKUST-1负载磷钨酸(HPW)(HPW@HKUST-1),采用XRD、SEM、EDS、BET、ICP、吡啶红外(Py-IR)、酸碱滴定对其进行了表征。评价了HPW@HKUST-1作为催化剂用于异丁烯(IB)与乙二醇(EG)选择性醚化合成乙二醇单叔丁基醚(EGME)的催化性能。结果表明,HPW负载量的提高增加了催化剂Bronsted酸活性位点,有利于提高反应物转化率,同时HPW负载量与催化剂平均孔径呈负相关性,平均孔径减小有利于提高EGME选择性。HPW负载量为10%(以HKUST-1物质的量为基准,下同)的HPW@HKUST-1催化剂活性较优,其催化IB和EG合成EGME最优的反应条件为:反应温度100℃,n(IB)/n(EG)=6,催化剂用量为EG质量(11.13 g)的10%,反应时间4 h。在该反应条件下,EG转化率为97%,EGME选择性为85%。此外,该催化剂具有良好的循环稳定性,使用5次后,EG转化率为91%,EGME选择性为78%。

关键词： HKUST-1 负载磷钨酸选择性醚化乙二醇单叔丁基醚催化技术

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再生与原生混凝土结构构件统一设计理论的基础问题（英文）

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Engineering 2023年第10期 188-197页

作者： Jianzhuang Xiao Kaijian zhang Tao Ding Qingtian zhang xuwen Xiao Department of Structural Engineering Tongji University College of Civil Engineering and Architecture Guangxi University College of Civil Engineering Fuzhou University

In the past 20 years, recycled aggregate concrete(RAC), as a type of low-carbon concrete, has become a worldwide focus of research. However, the design methodology for RAC structural components remains a challenge. Consequently, demands for a unified design of natural aggregate concrete(NAC) and RAC components have been presented. Accordingly, this study analyses the necessity of a unified design theory and provides an in-depth demonstration of the strength determination, compressive constitutive relationship, and design method of concrete components. The coefficient of variation of RAC strength is found to be generally higher than that of NAC strength. The compressive and tensile strengths of RAC can be defined and determined using the same method as that used for NAC. The uniaxial compressive constitutive relationship between NAC and RAC has a unified mathematical expression. However, the elastic modulus of RAC decreases, and its brittleness exhibits an increasing trend compared with that of ***, to unify the design formulae of RAC and NAC components for bearing capacity, modification factors for RAC components are proposed considering safety and reliability. Additionally, the feasibility of the proposed unified time-dependent design theory is demonstrated in terms of conceptual design and structural measures considering the effects of strength degradation and reinforcement corrosion. It is believed that this study enriches and develops the basic theory of concrete structures.

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先天性心脏病患儿术后1年营养不良影响因素分析

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中华儿科杂志 2023年第5期61卷 440-445页

作者：李莉娟胡春梅龚婷张琳芳李晓维肖旭文崔彦芹广州市妇女儿童医疗中心心脏重症监护室广州510623

目的探讨先天性心脏病(先心病)患儿术后1年持续营养不良的影响因素。方法回顾性队列研究。选取2018年2月至2019年1月广州市妇女儿童医疗中心收治的年龄1岁以下、诊断为先心病且行手术治疗的共502例患儿为研究对象,回顾性分析患儿年龄、... 详细信息

目的探讨先天性心脏病(先心病)患儿术后1年持续营养不良的影响因素。方法回顾性队列研究。选取2018年2月至2019年1月广州市妇女儿童医疗中心收治的年龄1岁以下、诊断为先心病且行手术治疗的共502例患儿为研究对象,回顾性分析患儿年龄、性别、胎龄、出生体重、出生身长、父母身高、父母体重、父母文化程度、家庭收入等基本资料以及先心病类型、手术和麻醉方式、体外循环时间,术后机械通气时间、重症监护病房(ICU)停留时间和总住院时间等资料,并通过问卷调查的方式随访患儿的膳食营养情况。术后1年年龄的体重(WAZ)≤-2定义为营养不良组,WAZ>-2非营养不良组,采用χ^(2)检验、t检验或秩和检验比较两组患儿围术期指标及辅食添加情况,采用Logistic回归分析患儿营养不良的影响因素。结果 502例患儿中男301例、女201例,入组年龄4.1(2.0,6.8)月龄。营养不良组90例,非营养不良组412例。营养不良组患儿出生时身长及体重均低于非营养不良组,差异均有统计学意义[(47.8±3.8)比(49.3±2.5)cm,(2.7±0.6)比(3.0±0.5)kg,均P<0.001]。营养不良组患儿父亲高中及以上文化程度的比例和家庭人均月收入5 000元及以上的比例均低于非营养不良组,差异均有统计学意义[18.9%(17/90)比30.8%(127/412),18.9%(17/90)比33.7%(139/412),均P<0.05]。营养不良组患儿复杂先心病占比更高,差异有统计学意义[62.2%(56/90)比47.3%(195/412),P<0.05]。营养不良组患儿术后机械通气时间、术后ICU停留时间、术后住院时间、总ICU停留时间及总住院时间均明显长于非营养不良组,差异均有统计学意义(均P<0.05)。营养不良组患儿术后1年蛋类及鱼肉类的添加频次≥2次/周的比例明显低于非营养不良组,差异均有统计学意义(均P<0.05)。Logistic回归多因素分析显示母亲产时体重<50 kg(OR=0.95,95%CI 0.91~0.99)、术前WAZ≤-2(OR=6.04,95%CI 3.13~11.65)、先心病复杂程度高(OR=2.23,95%CI 1.22~4.06)、术后住院时间>14 d(OR=2.61,95%CI 1.30~5.26)、术后1年每天添加食物种类<4种(OR=2.57,95%CI 1.39~4.76)、术后1年食用鱼肉频次<2次/周(OR=2.11,95%CI 1.13~3.93)的患儿术后1年营养不良发生风险明显增加。结论母亲产时体重、患儿术前营养状况、先心病复杂程度、术后住院时间、每天添加辅食种类及食用鱼肉频次是先心病患儿术后1年营养不良的影响因素。

关键词：心脏病婴儿营养不良心脏外科手术

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牦牛奶中不同酪蛋白的提取及其功能特性分析

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现代食品 2024年第4期30卷 194-196页

作者：周静张鑫陈旭雯付帅王练西昌新希望三牧乳业有限公司四川西昌615000

本研究利用SDS-PAGE电泳法,对提取的酪蛋白进行纯度分析,测定了不同酪蛋白组分在不同pH下的溶解性、乳化性和发泡性。结果显示,不同的pH会对酪蛋白组分的功能特性产生显著影响。因此,本研究结果可以为牦牛奶产品的加工与开发提供重要参考。

关键词：牦牛奶酪蛋白提取功能特性 SDS-PAGE

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Network topology and machine learning analyses reveal microstructural white matter changes underlying Chinese medicine Dengzhan Shengmai treatment on patients with vascular cognitive impairment

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PHARMACOLOGICAL RESEARCH 2020年 156卷 104773-104773页

作者： Lu, Hui zhang, Junying Liang, Ying Qiao, Yanan Yang, Caishui He, xuwen Wang, Wenxiao Zhao, Shaokun Wei, Dongfeng Li, He Cheng, Weidong zhang, Zhanjun Southern Med Univ Sch Tradit Chinese Med Guangzhou 510515 Guangdong Peoples R China China Acad Chinese Med Sci Inst Basic Res Clin Med Beijing 100700 Peoples R China Beijing Normal Univ State Key Lab Cognit Neurosci & Learning 19 Xinjiekouwai St Beijing 100875 Peoples R China Beijing Normal Univ IDG McGovern Inst Brain Res Beijing 100875 Peoples R China Capital Med Univ Sch Biomed Engn Beijing 100069 Peoples R China China Japan Friendship Hosp Beijing 100029 Peoples R China Beijing Normal Univ BABRI Ctr Beijing 100875 Peoples R China

With the increasing incidence of cerebrovascular diseases and dementia, considerable efforts have been made to develop effective treatments on vascular cognitive impairment (VCI), among which accumulating practice-based evidence has shown great potential of the traditional Chinese medicine (TCM). Current randomized double-blind controlled trial has been designed to evaluate the 6-month treatment effects of Dengzhan Shengmai (DZSM) capsules, one TCM herbal preparations on VCI, and to explore the underlying neural mechanisms with graph theory-based analysis and machine learning method based on diffusion tensor imaging (DTI) data. A total of 82 VCI patients were recruited and randomly assigned to drug (45 with DZSM) and placebo (37 with placebo) groups, and neuropsychological and neuroimaging data were acquired at baseline and after 6-month treatment. After treatment, compared to the placebo group, the drug groups showed significantly improved performance in Alzheimer's Disease Assessment Scale-Cognitive subscale (ADAS-cog) score (p < 0.001) and the other cognitive domains. And with the reconstruction of white matter structural network, there were more streamlines connecting the left thalamus and right hippocampus in the drug groups (p < 0.001 uncorrected), with decreasing nodal efficiency of the right olfactory associated with slower decline in the general cognition (r = 0.364, p = 0.048). Moreover, support vector machine classification analyses revealed significant white matter network alterations after treatment in the drug groups (accuracy of baseline vs. 6-month later, 68.18 %). Taking together, the present study showed significant efficacy of DZSM treatment on VCI, which might result from white matter microstructure alterations and the topological changes in brain structural network.

关键词： Vascular cognitive impairment Traditional Chinese medicine Dengzhan Shengmai capsule Diffusion tensor imaging Structural brain network Graph theory analysis

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Structure Characterization and Model Construction of Indonesian Brown Coal

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ENERGY & FUELS 2016年第5期30卷 3809-3814页

作者： Lin, Hua-lin Li, Ke-jian zhang, xuwen Wang, Hongxue Shanghai Inst Technol Shanghai 201418 Peoples R China China Shenhua Coal Liquid & Chem Corp Ltd Shanghai Res Inst Shanghai 201108 Peoples R China

Indonesian brown coal is analyzed using C-13 cross-polarization/magic angle spinning nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction (XRD) to obtain the information and parameters of the coal structural unit. A macromolecular structural model of Indonesian brown coal was constructed on the basis of the structural parameters and elemental analysis results. The C-13 chemical shift of this model was calculated using the ACD/C-13 NMR predictor. The results indicate that the aromaticity of Indonesian brown coal is 0.3412, and the structures of aromatic carbon are mainly types of naphthalene and benzene. The ratio of bridge carbon/surrounding carbon is 0.0696. Oxygen in the structural model mainly exists in the form of phenolic hydroxyl oxygen, carboxyl oxygen, and ether oxygen, of which phenolic hydroxyl oxygen and carboxyl oxygen are the most prominent. Nitrogen atom exists in the form of pyridine and pyrrole. The peak of XRD spectra at 20-30 degrees is broad with a strong gamma width. The calculated chemical shift spectrogram of the model is highly consistent with that of the experimental results. The structural formula calculated for Indonesian brown coal is C190H170O50N2. This information will be the basis of making use of Indonesian brown coal.

关键词： Chemical structure Oxygen Coal Hydrocarbons Aromatic compounds

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