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Spatial Identification of Housing Vacancy in China

Chinese Geographical Science 2021年第2期31卷 359-375页

作者： pan Jinghu dong Leilei College of Geography and Environmental Sciences Northwest Normal UniversityLanzhou 730070China Northwest Institute of Eco-Environment and Resources Lanzhou 730000China

The housing vacancy rate(HVR)is an important index in assessing the healthiness of residential real estate *** China,it is hardly to take advantage of the basic data of real estate information due to the opaque of those *** this paper,the HVR is estimated to two *** the grid level,urban area ratio was calculated by nighttime images after eliminating outliers of nighttime images and night light intensity of non-residential pixels in mixed pixels by a proposed modified optimal threshold method,and built-up areas in each pixel were extracted from the land-cover ***,the HVR is calculated by comparing the light intensity of specific grid with the light intensity of full occupancy rate *** the administrative scale,the GCI(‘ghost city’index)is constructed by calculating the ratio of the total light radiation intensity of a city to the total construction land area of the *** overall spatial differentiation pattern of the vacant houses in the national prefecture level administrative regions is *** following conclusions were drawn:vacant housing is rare in certain eastern coastal cities and regions in China with relatively fast economic *** based on exhausted resources,some mountainous cities,and cities with relatively backward economic development more typically showed high levels of housing *** GCI of prefecture-level administrative units gradually declined from north to south,whereas the east-west distribution showed a parabolic *** city level decreased,the GCI registered a gradual upward ***’s urban housing vacancy can be divided into five categories:industry or resources driven,government planned,epitaxy expansionary,environmental constraint and speculative activate by combining the spatial distribution of housing vacancy with the factors of natural environment,social economic development level,and population density into consideration.

关键词： housing vacancy rate(HVR) spatial identification nighttime light spatial pattern ghost city China

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Design of a Low-Power 20Gb/s 1:4 Demultiplexer in 0.18μm CMOS

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Chinese Journal of Electronics 2015年第1期24卷 71-75页

作者： pan Min feng Jun Institute of RF & OE-ICs Southeast University School of Computer and Information Hefei University of Technology

A low-power multi-phase clock 20Gb/s1:4 Demultiplexer(DEMUX) without inductors is designed in 0.18μm Complementary metal oxide semiconductor(CMOS) process. The 1:4 DEMUX includes two 1:2DEMUX cells, one 1/2 frequency divider cell, some data and clock buffers. A dynamic CMOS logic latch is used in the 1:2 DEMUX cell and a single clock dynamic-loading latch is used in the 1/2 frequency divider cell. These two kinds of logical structures not only reduce power dissipation and area, but also have an output rail-to-rail level. The rail-to-rail level can offer high noise margin and implement seamless connection without logic level conversion in system integration. The test results show that when the data rate of the input pseudorandom is 20Gb/s and the sequence length is 231-1, this 1:4 DEMUX can work well at a supply voltage of 2V. The output swing is 450 m V with external 50 Ohm load and the die size is 0.475×0.475mm2. The chip power dissipation is 86 m W, when four pads connect with a four-channel oscillograph.

关键词： Demultiplexer Low power Dynamic CMOS logic latch Single clock dynamic-loading latch.

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抗生素骨水泥治疗创伤性胫骨骨髓炎的临床疗效分析

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中国骨与关节损伤杂志 2015年第4期30卷 371-373页

作者：章晓云陈跃平龙飞攀康杰董盼锋饶毅袁振中广西中医药大学附属瑞康医院骨科广西南宁530011

目的探讨抗生素骨水泥治疗创伤性胫骨骨髓炎的临床疗效。方法自2008-07-2013-01诊治23例创伤性胫骨慢性骨髓炎,所有患者均一期彻底清创及清除病灶、自制抗生素骨水泥置入病灶区、根据创面情况行一期闭合或VSD技术封闭创面,使用VSD者7~1... 详细信息

目的探讨抗生素骨水泥治疗创伤性胫骨骨髓炎的临床疗效。方法自2008-07-2013-01诊治23例创伤性胫骨慢性骨髓炎,所有患者均一期彻底清创及清除病灶、自制抗生素骨水泥置入病灶区、根据创面情况行一期闭合或VSD技术封闭创面,使用VSD者7~10 d后再次清创,视创面情况更换自制抗生素骨水泥链珠及VSD,或行创面游离植皮、组织瓣转移附加钢板内固定,同期行骨移植术。结果本组治疗后感染均得到控制,植皮成活,皮肤弹性可,无复发。5例一期缝合伤口者,4例伤口一期愈合,1例皮缘变黑坏死,经换药、康复新局部外用后愈合。13例采用皮瓣移植,5例行创面邮票植皮,创面均愈合良好,创面愈合时间平均31.6（14~167）d。23例术后均获得平均28.6（18~60）个月随访,骨折端均获得骨性愈合,骨折愈合时间平均9.2个月。结论一期病灶彻底清除、髓腔或者局部植入万古霉素骨水泥、应用VSD负压封闭引流技术,二期结合皮瓣移植或邮票植皮技术闭合创面结合使用全身敏感抗生素,在治疗创伤性骨髓炎方面可获得较好的临床效果。

关键词：创伤性骨髓炎胫骨抗生素骨水泥封闭负压引流技术

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Vision-based aerial image mosaicking algorithm with object detection

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Journal of Systems Engineering and Electronics 2022年第2期33卷 259-268页

作者： HAN Jun LI Weixing feng Kai pan feng School of Automation Beijing Institute of TechnologyBeijing 100081China

Aerial image sequence mosaicking is one of the chal-lenging research fields in computer *** obtain large-scale orthophoto maps with object detection information,we propose a vision-based image mosaicking algorithm without any extra location *** to object detection results,we define a complexity factor to describe the importance of each input ima-ge and dynamically optimize the feature extraction *** feature points extraction and matching processes are mainly guided by the speeded-up robust features(SURF)and the grid motion statistic(GMS)algorithm respectively.A robust refer-ence frame selection method is proposed to eliminate the trans-formation distortion by searching for the center area based on ***,the sparse Levenberg-Marquardt(LM)al-gorithm and the heavy occluded frames removal method are ap-plied to reduce accumulated errors and further improve the mo-saicking *** proposed algorithm is performed by using multithreading and graphics processing unit(GPU)accel-eration on several aerial image *** experiment results demonstrate that our algorithm outperforms most of the existing aerial image mosaicking methods in visual quality while guaranteeing a high calculation speed.

关键词： image mosaicking object detection grid motion statistic(GMS) mapping

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Facile synthesis and superior photocatalytic and electrocatalytic performances of porous B-doped g-C_3N_4 nanosheets

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Journal of Materials Science & Technology 2018年第12期34卷 2515-2520页

作者： Qian Yan Gui-Fang Huang dong-feng Li Ming Zhang An-Lian pan Wei-Qing Huang Department of Applied Physics School of Physics and ElectronicsHunan University

As a low-cost visible-light-driven metal-free catalyst, graphitic carbon nitride(g-CN) has attracted increasing attention due to its wide applications for solar energy conversion, environmental purification,and organic photosynthesis. In particular, the catalytic performance of g-CNcan be easily modulated by modifying morphology, doping, and copolymerization. Simultaneous optimization, however, has little been achieved. Herein, a facile one-pot strategy is developed to synthesize porous B-doped g-CNnanosheets by using HBOand urea as the precursor during thermal polymerization. The resultant B-doped g-CNnanosheets retain the original framework of bulk g-CN, while induce prominently enhanced visible light harvesting and narrowing band gap by 0.32 eV compared to pure g-CN. Moreover, the adsorption capacity and photodegradation kinetics of methylene blue(MB) under visible light irradiation over B-doped g-CNnanosheets can be improved by 20.5 and 17 times, respectively. The synthesized porous B-doped g-CNnanosheets also exhibit higher activities than pure g-CNas bifunctional electrocatalyst for both oxygen evolution reaction(OER) and oxygen reduction reaction(ORR). The enhanced catalyst performance of porous B-doped g-CNnanosheets stems from the strong synergistic effect originating from the larger exposed active sites generated by the exfoliation of g-CNinto nanosheets and the porous structure, as well as the better conductivity owing to B-doping. This work provides a simple, effective, and robust method for the synthesis of g-CN-based nanomaterial with superior properties to meet the needs of various applications.

关键词： B-doped g-C_3N_4 nanosheets Photocatalysts Electrocatalysts

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Cytotoxic effect of specific T cells from mice with experimental autoimmune uveitis on murine photoreceptor cells

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International Journal of Ophthalmology(English edition) 2020年第8期13卷 1180-1186页

作者： Zheng-feng Liu feng Zhang Da-dong Guo Xue-Mei pan Hong-Sheng Bi Medical School of Ophthalmology&Optometry Shandong University of Traditional Chinese MedicineJinan250355Shandong ProvinceChina Shandong Provincial Hospital Affiliated to Shandong University Jinan250021Shandong ProvinceChina Shandong Maternity&Child Health Care Hospital Jinan 250014Shandong ProvinceChina Affiliated Eye Hospital of Shandong University of Traditional Chinese Medicine Jinan250002Shandong ProvinceChina Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases in Universities of ShandongEye Institute of Shandong University of Traditional Chinese MedicineJinan 250002Shandong ProvinceChina

AIM:To investigate the cytotoxic effect of specific T cells from mice with experimental autoimmune uveitis(EAU)as well as their secreted interferon(IFN)-γand interleukin(IL)-17A on murine photoreceptor(661 W)***:An EAU model was established in female mice by injection of interphotoreceptor retinoid binding protein(IRBP)emulsion supplemented with complete Freund’s adjuvant(CFA)and Mycobacterium tuberculosis(TB).On day 12 after induction of EAU,specific T cells from spleen and lymph node tissues were isolated and cultured for 4 d and the levels of IFN-γand IL-17A in the supernatants were determined by enzyme-linked immunosorbent assays(ELISAs).T cells and their supernatants were added to 661 W cells to observe the alteration of cell morphology;IFN-γand IL-17A were separately added to 661 W cells to observe the effect of IFN-γand IL-17A on cell ***:The levels of IFN-γand IL-17A in the T cell supernatants were 1568.64±38.79 pg/m L and 1456.57±46.98 pg/mL,*** supernatants apparently inhibited 661 W cell proliferation(P<0.05).T cells could also attach to the surface of 661 W cells,and IFN-γshowed a more serious cytotoxic effect on 661 W cells than IL-17A,inhibiting cell proliferation(P<0.01).CONCLUSION:IFN-γand IL-17A from T cells of EAU mice model can exert cytotoxic effects on murine photoreceptor cell proliferation,and IFN-γshows more serious cytotoxic effects on murine photoreceptor cells than IL-17A.

关键词： T cell murine photoreceptor cell IFN-γ IL-17A experimental autoimmune uveitis mouse

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Modeling and simulation of pinhole channels

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The Journal of China Universities of Posts and Telecommunications 2010年第2期17卷 67-71页

作者： WEI Ming-dong ZHANG Yun-feng ZHANG Ye-rong pan Zi-yi School of Eleca:onic Science and Engineering Nanjing University of Posts and Teleenmmtmications Nanjing 210003 China Jiangsu Posts and Telecommunications Planning and Designing Institute Co. Ltd Nanjing 210006 China

This article presents a general pinhole channel reference model based on the cause of pinhole effect. On the base of this reference model, a deterministic simulation model is developed by keeping the difference of correlation properties between reference and simulation model as smaller as possible. The correlation properties include temporal autocorrelation fimction （ACF）, two-dimensional （2-D） space cross-correlation function （CCF） and frequency correlation function （FCF）. The results show that although pinhole channel has good correlation properties, the channel capacity is very low because of the low rank of channel transform matrix.

关键词： pinhole channel modeling channel simulation deterministic simulation models

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Recent Highlights of Chinese Herbs in Treatment of Allergic Disease：Acting via Mitogen-activated Protein Kinase Signal Pathway

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Chinese Journal of Integrative Medicine 2017年第8期23卷 570-573页

作者： HE Xu-feng pan Wei-dong YAO Yi-li ZHANG Hui-min Department of Dermatol-ogy Shuguang HospitalShanghai University of Traditional Chinese Medicine Shanghai 201203 China

The histamine receptor antagonists in the treatment of allergic disease have *** treatments of Chinese herbs have some curative effects on allergic skin *** research indicates that the mitogen-activated protein kinase（MAPK）signaling pathway might be equally important in allergic *** was found that the inhibition of MAPK signaling pathways might relieve allergy symptoms,and some herbs can inhibit the MAPK pathway,which yields anti-allergy *** medicines（CMs）have immense potential in the development of treatments for allergic disease.

关键词： Chinese medicines allergic disease mitogen-activated protein kinase signalpathway

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Simultaneously Regulating Uniform Zn^(2+) Flux and Electron Conduction by MOF/rGO Interlayers for High‑Performance Zn Anodes

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Nano-Micro Letters 2021年第5期13卷 34-44页

作者： Ziqi Wang Liubing dong Weiyuan Huang Hao Jia Qinghe Zhao Yidi Wang Bin Fei feng pan Department of Materials Science and Engineering College of Chemistry and Materials ScienceJinan UniversityGuangzhou 510632People’s Republic of China School of Advanced Materials Peking University Shenzhen Graduate SchoolShenzhen 518055People’s Republic of China Nano Center Institute of Textiles and ClothingHong Kong Polytechnic UniversityHunghomKowloonHong Kong 999077People’s Republic of China

Owing to the merits of low cost,high safety and environmental benignity,rechargeable aqueous Zn-based batteries(ZBs)have gained tremendous attention in recent ***,the poor reversibility of Zn anodes that originates from dendrite growth,surface passivation and corrosion,severely hinders the further development of *** tackle these issues,here we report a Janus separator based on a Zn-ion conductive metal-organic framework(MOF)and reduced graphene oxide(rGO),which is able to regulate uniform Zn2+flux and electron conduction simultaneously during battery *** by the MOF/rGO bifunctional interlayers,the Zn anodes demonstrate stable plating/stripping behavior(over 500 h at 1 mA cm^(−2)),high Coulombic efficiency(99.2%at 2 mA cm^(−2) after 100 cycles)and reduced redox ***,it is also found that the Zn corrosion can be effectively retarded through diminishing the potential discrepancy on Zn *** a separator engineering also saliently promotes the overall performance of Zn|MnO2 full cells,which deliver nearly 100%capacity retention after 2000 cycles at 4 A g^(−1) and high power density over 10 kW kg^(−1).This work provides a feasible route to the high-performance Zn anodes for ZBs.

关键词： Zn-based battery Zn anode Janus separator Metal-organic framework Reduced graphene oxide

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Diverse functions of sox9 in liver development and homeostasis and hepatobiliary diseases

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Genes & Diseases 2024年第4期11卷 170-187页

作者： Taiyu Shang Tianyi Jiang Xiaowen Cui Yufei pan Xiaofan feng Liwei dong Hongyang Wang School of Life Sciences Institute of Metabolism and Integrative BiologyFudan UniversityShanghai 200438China National Center for Liver Cancer The Naval Medical UniversityShanghai 201805China International Cooperation Laboratory on Signal Transduction Eastern Hepatobiliary Surgery InstituteThe Second Military Medical UniversityShanghai 200438China Laboratory of Signaling Regulation and Targeting Therapy of Liver Cancer Second Military Medical University&Ministryof EducationShanghai 200438China

The liver is the central organ for digestion and detoxification and has unique metabolic and regenerative *** hepatobiliary system originates from the foregut endoderm,in which cells undergo multiple events of cell proliferation,migration,and differentiation to form the liver parenchyma and ductal system under the hierarchical regulation of transcription *** on liver development and diseases have revealed that SRY-related high-mobility group box 9(SOx9)plays an important role in liver embryogenesis and the progression of hepatobiliary ***9 is not only a master regulator of cell fate determination and tissue morphogenesis,but also regulates various biological features of cancer,including cancer stemness,invasion,and drug resistance,making Sox9 a potential biomarker for tumor prognosis and *** review systematically summarizes the latest findings of sox9 in hepatobiliary development,homeostasis,and *** also highlight the value of sox9 as a novel biomarker and potential target for the clinical treatment of major liverdiseases.

关键词： Biliary system Cancer Homeostasis Liver diseases SOX9

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