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基于少模长周期光纤叠栅的模式转换器

物理学报 2019年第5期68卷 141-147页

作者：薛艳茹田朋飞金娃赵能靳云毕卫红燕山大学信息科学与工程学院河北省特种光纤与光纤传感重点实验室秦皇岛066004 河北科技师范学院机电工程学院秦皇岛066004 河北建材职业技术学院机电工程系秦皇岛066004

本文提出一种在同一段少模光纤上写入两个不同周期Λ1和Λ2的长周期光纤光栅构成叠栅的方法,实现了纤芯基模LP_(01)向高阶纤芯模LP_(11)模式转换的宽带宽的新型的全光纤模式转换器.利用有限元法和耦合模理论建立了模式转换器的理论分析... 详细信息

本文提出一种在同一段少模光纤上写入两个不同周期Λ1和Λ2的长周期光纤光栅构成叠栅的方法,实现了纤芯基模LP_(01)向高阶纤芯模LP_(11)模式转换的宽带宽的新型的全光纤模式转换器.利用有限元法和耦合模理论建立了模式转换器的理论分析模型.数值仿真分析了叠栅中两个子光栅周期间隔、光栅长度、耦合系数等光栅参数对模式转换器的影响.仿真分析和实验结果表明,通过改变两个子光栅的周期间隔来改变两个损耗峰的位置,形成一个损耗峰,从而可以实现宽带宽的模式转换器,其10dB带宽约是单栅的2倍.与传统的模式转换器相比,该转换器带宽宽、转换效率高,尺寸小、抗干扰能力强,可以在模分复用系统和光通信中得到广泛的应用.

关键词：长周期光纤叠栅少模光纤模式转换器耦合系数

Effects of Qingre Huoxue Jiedu Formula on Nerve growth Factor-Induced Psoriasis

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Chinese Journal of Integrative Medicine 2022年第3期28卷 236-242页

作者： wa.g Jun-hui JIANg Ying-juan LI Min wa.g Ning CUI Bing-nan LIU wa-li Dermatology Department Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing(100053)China Dermatology Department Dongfang HospitalBeijing University of Chinese MedicineBeijing(100078)China Laboratory of Molecular Biology Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing(100053)China

Objective:To elucidate the mechanisms of 4 effective components from a Chinese medicine formula,namely Qingre Huoxue Jiedu Formula(QHJ heat-and toxin-clearing and blood-activating formula),in the treatment of nerve growth factor(NgF)-induced ***:Keratinocyte proliferation and T cell proliferation models were developed using *** NgF solution(NgF+DMEM,100 ng/mL)was added to all induced groups and treated groups and were cultured for 24 h,while a solution with NTRK1 antagonist(K252 a+DEME,300 nmol/L)was added and cultured for 1 *** models were used to evaluate the effects of the treatment with each of the 4 components of QHJ,namely shikonin,paeonol,astilbin and ursolic *** apoptosis and proliferation were measured by flow cytometry analysis and CCK8 assay,*** mRNA expression levels of Bax,Bcl-xl,and NgF receptor(NgFR)were assessed by quantitative real-time PCR(qRT-PCR)and Western blot analysis,***:(1)All QHJ-treated groups showed significantly increased cell apoptosis and inhibition of cell proliferation compared with the NgF-induced groups(Pgnificantly enhanced cell apoptosis and inhibition of cell proliferation compared with cells treated with QHJ only(Pgroups showed higher protein expression levels of Bax,Bcl-xl compared with other groups(Pgnificantly increased the protein expression levels of Bax,Bcl-xl and NgFR compared with those treated with QHJ only(all Pght be through enhancing cell apoptosis and inhibition of cell proliferation,and upregulating the expression level of Bax,Bcl-xl and NgFR.

关键词： psoriasis inflammatory dermatosis nerve growth factor keratinocyte Chinese medicine formula

基于少模光纤长周期光栅叠栅的折射率传感特性

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光子学报 2018年第1期47卷 93-99页

作者：刘强毕卫红付兴虎薛艳茹付广伟金娃燕山大学信息科学与工程学院河北省特种光纤与光纤传感重点实验室河北秦皇岛066004

为了克服折射率测量过程中温度交叉敏感的影响,提出并制备了一种少模光纤长周期光栅传感器.该传感器利用CO_2激光器在少模光纤上先写入周期为654μm、长度为30mm的长周期光栅,然后用旋转平台将光纤旋转180°,再写入相同长度周期为819μ... 详细信息

为了克服折射率测量过程中温度交叉敏感的影响,提出并制备了一种少模光纤长周期光栅传感器.该传感器利用CO_2激光器在少模光纤上先写入周期为654μm、长度为30mm的长周期光栅,然后用旋转平台将光纤旋转180°,再写入相同长度周期为819μm的长周期光栅制作而成,其传输光谱在1 487.2nm和1 533.0nm处出现两个由不同模式耦合形成的谐振峰,通过监测两个谐振峰差值的变化减少温度串扰,实现折射率的测量.实验结果表明:两个谐振峰差值在折射率1.333 3~1.376 6范围内的灵敏度为143nm/RIU,在温度20~70℃范围内的灵敏度为-0.002 5nm/℃,温度灵敏度远低于折射率灵敏度,具有对温度不敏感的特性.与传统光纤传感器相比,该传感器具有温度干扰小,折射率灵敏度高等优势,并且尺寸较小、结构紧凑,可在工业、水利、医学等领域广泛应用.

关键词：少模光纤长周期光纤光栅折射率传感温度交叉敏感

geology and mineralization of the Bayan Obo supergiant carbonatite-type REE-Nb-Fe deposit in Inner Mongolia, China: A review

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China geology 2023年第4期6卷 716-750,I0004,I0005页

作者： Yi-ke Li Chang-hui Ke hong-quan She Deng-hong wa.g Cheng Xu An-jian wa.g Rui-ping Li Zi-dong Peng Ze-ying Zhu Kui-feng Yang wei Chen Jian-wei Zi Wen-lei Song Yong-gang Zhao Li Zhang hong Yu Bin guo Sheng-quan Zhou Xing-yu Yuan Jing-yao Liu MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking UniversityBeijing 100871China Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China John de Laeter Centre Curtin UniversityBentleyWA 6102Australia State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China Bayan Obo Iron Mine Baotou Steel(Group)Co.Ltd.Inner MongoliaBaotou 014080China

The Bayan Obo supergiant carbonatite-related rare-earth-element-niobium-iron(REE-Nb-Fe) endogenetic deposit(thereafter as the Bayan Obo deposit), located at 150 km north of Baotou City in the Inner Mongolia Autonomous Region, is the largest rare-earth element(REE) resource in the world. Tectonically,this deposit is situated on the northern margin of the North China Craton and adjacent to the Xing’anMongolian orogenic belt to the south. The main strata within the mining area include the Neoarchean Se’ertengshan group and the Mesoproterozoic Bayan Obo group. generally, the rare earth, niobium, and iron mineralization within the deposit are intrinsically related to the dolomite carbonatites and the extensive alteration of the country rocks caused by the carbonatite magma intrusion. The alteration of country rocks can be categorized into three types: contact metasomatism(anti-skarn and skarn alteration), fenitization,and hornfelsic alternation. As indicated by previous studies and summarized in this review, the multielement mineralization at Bayan Obo is closely associated with the metasomatic replacement of siliceous country rocks by carbonatite magmatic-hydrothermal fluids. The metasomatic process is comparable to the conventional skarnification that formed due to the intrusion of intermediate-acid magmatic rocks into limestone strata. However, the migration pattern of Si O2, Ca O, and Mg O in this novel metasomatic process is opposite to the skarn alteration. Accordingly, this review delineates, for the first time, an antiskarn metallogenic model for the Bayan Obo deposit, revealing the enigmatic relationship between the carbonatite magmatic-hydrothermal processes and the related iron and rare earth ***, this study also contributes to a better understanding of the REE-Nd-Fe metallogenetic processes and the related fluorite mineralization at the Bayan Obo deposit.

关键词： Rare earth elements Niobium ore Iron ore Fluorite ore Igneous carbonatite Fenitization Metasomatism Anti-skarn Bayan Obo

Sodium fluoride sacrificing layer concept enables high-efficiency and stable methylammonium lead iodide perovskite solar cells

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Journal of Materials Science & Technology 2022年第18期113卷 138-146页

作者： Huimin Xiang Pengyun Liu wei wa.g Ran Ran wei Zhou Zongping Shao College of Chemical Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 210009China wa School of Mines:Minerals Energy and Chemical Engineering(WASM-MECE)Curtin UniversityPerthWA 6845Australia

As next-generation photovoltaic devices,methylammonium lead iodide(MAPbI_(3))-based organic-inorganic halide perovskite solar cells(PSCs)have received considerable attention because of their cost effectiveness and high ***,their practical applications are retarded due to severe instability under moisture,thermal and sunlight conditions,which are closely related to the insufficient perovskite film quality and high photocatalytic activity of defective TiO_(2) electron-transporting layer(ETL)to accelerate the perovskite ***,remarkably enhanced power conversion efficiency(PCE)and stability of MAPbI_(3)-based PSCs is reached through the use of a new sodium fluoride(NaF)sacrificing layer,which,introduced between the perovskite layer and ETL,is sacrificed during cell fabrication by penetrating into the perovskite layer,improving the perovskite film quality,while partial NaF is incorporated into the mesoporous TiO_(2) ETL during NaF layer fabrication to passivate TiO_(2) and construct a well-matched energy level *** a result,the optimized PSC generates a high PCE of 20.9%,which is 17%higher than that of the pristine cell(17.9%),and outstanding performance stability due to remarkably enhanced moisture,thermal and sunlight *** study highlights a simple and effective approach to boost the PCE and durability of MAPbI 3-based PSCs simultaneously,accelerating the commercialization of this technology.

关键词： Perovskite solar cells Sodium fluoride sacrificing layer Defect passivation Stability

Development of a human rotavirus induced diarrhea model in Chinese mini-pigs

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World Journal of gastroenterology 2016年第31期22卷 7135-7145页

作者： Jin-tao Li Jing wei hong-xia guo Jiang-bo Han Nan Ye Hai-Yang He tian-tian Yu Yu-zhang Wu Institute of Tropical Medicine Third Military Medical University Institute of Immunology PLA Third Military Medical University School of Life Science Southwest University

AIM: to establish a new animal model for the research of human rotavirus(HRV) infection, its pathogenesis and immunity and evaluation of potential ***: 5-d, 30-d and 60-d-old Chinese mini-pigs, guizhou and bamma, were inoculated with a single oral dose of attenuated strain wa, g1, g3 of HRV, and PbS(control), respectively, and fecal samples of pigs from 0 to 7 d post infection(DPI) were collected individually. Enzyme linked immunosorbent assay was used to detect HRV antigen in feces. the HRV was tested by real-time PCR(Rt-PCR). the sections of the intestinal tissue were stained with hematoxylin and eosin to observe the morphologic variation by microscopy. Immunofluorescence was used to determine the HRV in intestinal tissue. HRV particles in cells of the ileum were observed by electron ***: When inoculated with HRV, mini-pigs younger than 30 d developed diarrhea in an agedependent manner and shed HRV antigen of the sameinoculum, as demonstrated by Rt- *** changes were observed in HRV inoculated mini-pigs including small intestinal cell tumefaction and necrosis. HRV that was distributed in the small intestine was restricted to the top part of the villi on the internal wall of the ileum, which was observed by immunofluorescence and transmission electron microscopy. Virus particles were observed in golgi like follicles in HRV-infected neonatal minipigs. guizhou mini-pigs were more sensitive to HRV than bamma with respect to RV antigen shedding and clinical ***: these results indicate that we have established a mini-pig model of HRV induced diarrhea. Our findings are useful for the understanding of the pathogenic mechanisms of HRV infection.

关键词： Human rotavirus Animal model Chinese mini-pigs Diarrhea Intestine

Beyond two-dimension: One-and zero-dimensional halide perovskites as new-generation passivators for high-performance perovskite solar cells

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Journal of Energy Chemistry 2023年第8期83卷 189-208,I0007页

作者： Yuanyuan Zhao Huimin Xiang Ran Ran wei Zhou wei wa.g Zongping Shao State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009JiangsuChina wa School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerthWA 6845Australia

Perovskite solar cells(PSCs) as a rising star in the photovoltaic field have received rapidly increasing attention recently due to the boosting power conversion efficiencies(PCEs) from 3.8% to 25.7% in the last13 years. Nevertheless, the conventional PSCs with three-dimensional(3D) halide perovskites as light absorbers suffer from inferior PCEs and poor durability under sunlight, high-temperature and humid conditions due to the high defect amount and structural instability of 3D perovskites, respectively. To tackle these crucial issues, lower-dimensional halide perovskites including zero-dimensional(0D), onedimensional(1D), and two-dimensional(2D) perovskites have been employed as efficient passivators to boost the PCEs and durability of 3D-PSCs due to the high structural stability and superior resistance against moisture, heat and sunlight. Therefore, in order to achieve better understanding about the advantages and superiorities of combining low-dimensional perovskites with their 3D counterparts in improving the PCEs and durability of 3D-PSCs, the recent advances in the development and fabrication of mixeddimensional PSCs with 1D/0D perovskites as passivators are summarized and discussed in the *** superiority of 1D/0D perovskites as passivators over 2D counterparts, the passivation mechanism and the methods of 1D/0D perovskites are also presented and discussed. Furthermore, the rules to choose1D/0D perovskites or relevant spacer cations are also emphasized. On this basis, several specific strategies to design and fabricate mixed-dimensional PSCs with 1D/0D perovskites are presented and ***, the crucial challenges and future research directions of mixed-dimensional PSCs with 1D/0D perovskites as passivators are also proposed and discussed. This review will provide some useful insights for the future development of high-efficiency and durable mixed-dimensional PSCs.

关键词： Perovskite solar cells Mixed-dimensional Passivators Stability Power conversion efficiency

A bilateral cyano molecule serving as an effective additive enables high-efficiency and stable perovskite solar cells

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Journal of Energy Chemistry 2021年第11期30卷 243-251,I0006页

作者： Pengyun Liu Huimin Xiang wei wa.g Ran Ran wei Zhou Zongping Shao wa School of Mines:Minerals Energy and Chemical Engineering(WASM-MECE)Curtin UniversityPerthWA 6845Australia College of Chemical Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 210009JiangsuChina

The existence of defects in perovskite films is a major obstacle that prevents perovskite solar cells (PSCs) from high efficiency and long-term stability. A variety of additives have been introduced into perovskite films for reducing the number of defects. Lewis base-based additive engineering has been considered as an effective way to eliminate defects, especially the defects caused by the uncoordinated Pb^(2+). In this work, for the first time, a bilateral cyano molecule (succinonitrile, SN) which is a commonly used plasticizer in solid electrolyte of solid-state lithium batteries was selected as an additive to modify organic–inorganic hybrid perovskite films in PSCs. SN is featured with two cyano groups (–C≡N) distributing at both terminals of the carbon chain, providing two cross-linking points to interact with perovskites crystals via coordinating with uncoordinated Pb2+ and forming hydrogen bonds with –NH2 groups in perovskite. It was found that the addition of SN into perovskite precursor solution could effectively reduce defects, particularly inhibit the appearance of Pb0 and thus suppress trap-assisted nonradiative charge carrier recombination. As a result, the efficiency of CH_(3)NH_(3)PbI_(3)(Cl) (MAPbI_(3)(Cl))-based PSCs was improved from 18.4% to 20._(3)% with enhanced long-term stability at N2 and humid air atmosphere. This work provides a facile and effective strategy to enhance the PCE and stability of PSCs simultaneously, facilitating the commercialization of PSCs.

关键词： Perovskite solar cells Succinonitrile additive Cyano groups Defect engineering Suppressed charge recombination

公益性:民办高校发展的现实观照——兼论高等教育的产业属性

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山西大学学报(哲学社会科学版) 2009年第3期32卷 95-100页

作者：米红李小娃厦门大学教育研究院

公益性是高等教育的基本属性,是民办高教得以合理存在并发展的基石。但是,民办高等教育的发展过程以及民办高校的运行过程是公益性和产业性相互作用的过程,其中公益性是民办高教得以存在并发展的核心要求,而产业性存在的价值最终诉诸对... 详细信息

公益性是高等教育的基本属性,是民办高教得以合理存在并发展的基石。但是,民办高等教育的发展过程以及民办高校的运行过程是公益性和产业性相互作用的过程,其中公益性是民办高教得以存在并发展的核心要求,而产业性存在的价值最终诉诸对民办高教所应具有的公益性的维护。民办高教发展过程中出现的公益性危机主要是民办高教制度建设不完善的表现,完善现代大学制度建设是维护民办高教公益性的必然选择。

关键词：民办高校公益性产业性现代大学制度