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数字化穿支皮瓣标本的设计与制作

解剖学杂志 2018年第3期41卷 330-331,F0003页

作者：郭东铭谢巍谭建国曹宇辉姚婕邓南星周小兵南华大学人体形态中心衡阳421001

随着数字化技术的迅速发展，数字化穿支皮瓣标本的设计与制作已逐渐成为临床皮瓣设计的重要辅助手段。传统的标本剥制技术耗时长、破坏性大，标本不能重复使用，难以显示皮肤微血管立体构筑。Saint-Cyr等于2009年对不同部位的多个单穿... 详细信息

随着数字化技术的迅速发展，数字化穿支皮瓣标本的设计与制作已逐渐成为临床皮瓣设计的重要辅助手段。传统的标本剥制技术耗时长、破坏性大，标本不能重复使用，难以显示皮肤微血管立体构筑。Saint-Cyr等于2009年对不同部位的多个单穿支进行了选择性血管造影，并利用CT自配软件首次绘制出3D可视化皮瓣。而随着三维数字化技术在人体解剖学研究中的广泛应用陪，唐茂林等、周小兵等将造影剂氧化铅与明胶、羧甲基纤维素（carboxymethylcellulose，CMC）制成混合填充剂进行人体血管灌注，通过CT数据重建血管三维图像，成功地将数字化图像处理技术引入到全身动脉三维可视化研究。然而，该方法在皮肤血管灌注显示上仍然存在不足。本研究结合明胶一氧化铅灌注技术的优点，采用多点分部灌注，选择羧甲基纤维素／氧化铅水凝胶及乳胶一羧甲基纤维素／氧化铅混合造影填充剂分量行全身动脉造影，经X线摄影、CT扫描采集数据，利用Mimics软件制做动脉穿支皮瓣的三维重建，为临床外科皮瓣的设计提供可靠的科研数据。

关键词：数字化技术穿支皮瓣皮瓣设计标本制作 Mimics软件选择性血管造影羧甲基纤维素

Accurate Evaluation of Cooling System Capability of Three-phase IGBT-based Inverter

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Chinese Journal of Electrical Engineering 2021年第1期7卷 73-78页

作者： Dan Zheng Puqi Ning Xiaoguang Chai Wei Sun Zhijie Qiu yuhui Kang Han cao Tao Fan Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

In this paper,an offline evaluation method for the cooling capability of three-phase insulated-gate bipolar transistor(IGBT)inverters is presented,which can better emulate real working *** a properly designed sudden-stop control sequence,the conventional junction temperature monitoring method at a low current is used to calculate the junction temperature before the sudden stop of an *** can solve the challenging switching loss calculation issue in conventional ***,the feasibility,control sequence,and electrical behaviors of the proposed method are validated through experimental tests.

关键词： Junction temperature monitoring IGBT conduction voltage

第32届中国化学奥林匹克(决赛)试题解析(三)

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大学化学 2019年第6期34卷 92-102页

作者：曹宇辉董浩然傅裕霍培昊刘静嘉杨可心余子迪北京大学化学与分子工程学院

第7题题目7-1某些物质吸收光后,电子从基态跃迁至激发态,而由激发态跃迁回基态时,以产生荧光的形式将能量释放出。研究发现,在λmax=645nm的光激发下,化合物1几乎不产生荧光,但是化合物1与甲醛反应生成的化合物2能产生很强的荧光。据此... 详细信息

第7题题目7-1某些物质吸收光后,电子从基态跃迁至激发态,而由激发态跃迁回基态时,以产生荧光的形式将能量释放出。研究发现,在λmax=645nm的光激发下,化合物1几乎不产生荧光,但是化合物1与甲醛反应生成的化合物2能产生很强的荧光。据此,化合物1能够高选择性识别甲醛。

关键词：试题解析奥林匹克化学中国选择性识别化合物能量释放激发态

Space-Air-Ground Integrated Network (SAGIN) for 6G: Requirements, Architecture and Challenges

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China Communications 2022年第2期19卷 90-108页

作者： Huanxi Cui Jun Zhang yuhui Geng Zhenyu Xiao Tao Sun Ning Zhang Jiajia Liu Qihui Wu Xianbin cao School of Electronic and Information Engineering Beijing Key Laboratory for Network-Based Cooperative Air application ManagementBeihang UniversityBeijing 100191China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China China Mobile Research Institute Beijing 100053China Department of Electrical and Computer Engineering University of WindsorONCanadaN9B 3P4 National Engineering Laboratory for Integrated Aero-Space-Ground-Ocean Big Data Application Technology the School of CybersecurityNorthwestern Polytechnical UniversityXi’anShaanxi710072China College of Electronics and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210007China

As the fifth-generation(5G)mobile communication network may not meet the requirements of emerging technologies and applications,including ubiquitous coverage,industrial internet of things(IIoT),ubiquitous artificial intelligence(AI),digital twins(DT),etc.,this paper aims to explore a novel space-air-ground integrated network(SAGIN)architecture to support these new requirements for the sixth-generation(6G)mobile communication network in a flexible,low-latency and efficient ***,we first review the evolution of the mobile communication network,followed by the application and technology requirements of *** the current 5G non-terrestrial network(NTN)architecture in supporting the new requirements is deeply *** that,we proposes a new flexible,low-latency and flat SAGIN architecture,and presents corresponding use ***,the future research directions are discussed.

关键词： 6G AI DT SAGIN NTN Network architecture

第32届中国化学奥林匹克(决赛)试题解析(二)

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大学化学 2019年第5期34卷 94-100页

作者：曹宇辉董浩然傅裕霍培昊刘静嘉杨可心余子迪北京大学化学与分子工程学院

第5题题目NO氢化还原反应为:2NO(g)+2H2(g)===N2(g)+2H2O(g)实验得到了起始反应速率的一组数据如下:5-1根据以上实验结果,求出反应物的反应级数(取整数),并计算反应的平均速率常数。

关键词：化学奥林匹克(决赛) 试题解析

U(VI) adsorption behavior onto polypyrrole coated 3R-MoS2 nanosheets prepared with the molten salt electrolysis method

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International Journal of Minerals,Metallurgy and Materials 2022年第3期29卷 479-489页

作者： yuhui Liu Meng Tang Shuang Zhang Yuling Lin Yingcai Wang Youqun Wang Ying Dai Xiaohong cao Zhibin Zhang Yunhai Liu State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013China

To improve the separation capacity of uranium in aqueous solutions, 3R-MoS2 nanosheets were prepared with molten salt electro- lysis and further modified with polypyrrole (PPy) to synthesize a hybrid nanoadsorbent (PPy/3R-MoS2). The preparation conditions of PPy/3R- MoS2 were investigated and the obtained nanosheets were characterized with scanning electron microscope (SEM), high resolution transmis- sion electron microscope (HRTEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectro- scopy (XPS). The results showed that PPy/3R-MoS2 exhibited enhanced adsorption capacity toward U(VI) compared to pure 3R-MoS2 and PPy;the maximum adsorption was 200.4 mg/g. The adsorption mechanism was elucidated with XPS and FTIR: (1) negatively charged PPy/3R-MoS2 nanosheets attracted by an electrostatic interaction;(2) exposed C, N, Mo, and S atoms complexed with U(VI) through co- ordination;(3) Mo in the complex partly reduced the adsorbed U(VI) to U(IV), which further regenerated the adsorption point and continu- ously adsorbed U(VI). The design of the PPy/3R-MoS2 composite with a high adsorption capacity and chemical stability provides a new direc- tion for the removal of radionuclide.

关键词： molten salt electrolysis 3R-MoS2 nanosheets polypyrrole modification adsorption uranium

第32届中国化学奥林匹克(决赛)试题解析(一)

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大学化学 2019年第4期34卷 84-92页

作者：曹宇辉董浩然傅裕霍培昊刘静嘉杨可心余子迪北京大学化学与分子工程学院北京100871

详细介绍和评析了第32届中国化学奥林匹克决赛试题,提供了解题思路、计算过程,并提供了有关参考文章。

关键词：化学竞赛试题分析

Leveraging nano-engineered mesenchymal stem cells for intramedullary spinal cord tumor treatment

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Chinese Chemical Letters 2023年第5期34卷 449-455页

作者： Lu Tang Mengying Xie Jing Li Yijun Mei Yuqi cao Qiaqia Xiao Haijuan Dong yuhui Zhang Wei Wang Department of Pharmaceutics State Key Laboratory of Natural MedicinesSchool of PharmacyChina Pharmaceutical UniversityNanjing 210009China NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients China Pharmaceutical UniversityNanjing 210009China The Public Laboratory Platform China Pharmaceutical UniversityNanjing 210009China Department of Spine Surgery Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200127China

Intramedullary spinal cord tumor(IMSCT)is comparatively rare malignant tumor in the central nervous system and is very difficult accessible by conventional chemotherapy ***,there are very limited researches for IMSCT treatment using *** fill this gap,we originally reported a targeted strategy by leveraging nano-engineered mesenchymal stem cells(MSCs)for synergistic antiIMSCT *** this study,two mode drugs paclitaxel(PTX)and metformin(MET)were co-loaded in maleimide-modified poly(lactic-co-glycolicacid)(PLGA-MAL)nanoparticles,which were further conjugated onto MSCs surface via the thioether bond formed between PLGA-MAL and MSCs without affecting the migration ability of *** to the excellent tumor tropism and penetrability of MSCs and good biodegradability of PLGA,the designed drug delivery platform could accurately target IMSCT sites to exert long-term synergistic antitumor efficacy,exhibiting promising research value for alternative IMSCT management beyond surgery.

关键词： Mesenchymal stem cell Intramedullary spinal cord tumor Metformin Nanosystem Targeted drug delivery

Synergy of photocatalytic reduction and adsorption for boosting uranium removal with PMo_(12)/UiO-66 heterojunction

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Chinese Chemical Letters 2022年第7期33卷 3577-3580页

作者： Zhibin Zhang Zifan Li Zhimin Dong Fengtao Yu Yingcai Wang Youqun Wang Xiaohong cao yuhui Liu Yunhai Liu Jiangxi Province Key Laboratory of Synthetic Chemistry East China University of TechnologyNanchang 330013China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China

In this work,we proposed a new U(Ⅵ)removal strategy combining adsorption and photocatalytic reduction by the PMo_(12)/UiO-66 *** PMo_(12)has been encapsulated in the cavities of Ui O-66 by a one-step hydrothermal method,and the PMo_(12)/UiO-66 exhibited high adsorption capacity and photocatalytic *** maximal theoretical sorption capacity of U(Ⅵ)on 15%PMo_(12)/UiO-66 reached225.36 mg/g and the photoreduction rate of 15%PMo_(12)/UiO-66 is about thirty times as much as *** the light irradiation,the photogenerated electrons rapidly transport from UiO-66 to PMo_(12),and the photo-generated electrons could efficiently reduce the pre-enriched U(Ⅵ)to U(IV).This work provides new insights into remediation of the radioactive environment.

关键词： UiO-66 PMo12 Uranium Adsorption Photocatalytic reduction