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空心板栗状MAPbI_(3)/TiO_(2)的制备及可见光下降解甲苯研究

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云南大学学报（自然科学版） 2024年第1期46卷 143-150页

作者：李荡张杨董玮李远勋顾怀章党铭铭凯里学院理学院贵州凯里556011 湖南有色金属职业技术学院资源环境系湖南株洲412000

首先,以TiCl_(4)为钛源,采用水热法制备空心板栗状TiO_(2)载体.然后,再以PbI_(2)及MAI(MA=CH_(3)NH_(3)^(+))为前驱体,采用溶液法在空心板栗状TiO_(2)上一步构筑MAPbI_(3)薄膜,形成空心板栗状MAPbI_(3)/TiO_(2)复合光催化剂.以甲苯为目标降解物,考察板栗状MAPbI_(3)/TiO_(2)在可见光下的催化降解性能,并对材料的能级结构进行分析,揭示材料的降解机理.结果表明:钙钛矿型MAPbI_(3)薄膜的组成及形貌与PbI_(2)和MAI投料比密切相关,随着投料比的增加,薄膜的成分由MAPbI_(3)和MAI两相变为纯MAPbI_(3),再转变MAPbI_(3)和PbI_(2)两相.能级匹配、结构特殊的板栗状MAPbI_(3)/TiO_(2)不仅可以降低光生电子和空穴的复合率,还能有效地将光生电子和空穴分别转移至MAPbI_(3)的导带及TiO_(2)价带,促进活性粒子·O_(2)^(-)和·OH的生成,因此在甲苯的降解中表现更优的性能.在可见光的照射下,MAPbI_(3)/TiO_(2)对甲苯的降解率在90 min内可高达98%.

关键词：空心板栗状 MAPbI_(3)/TiO_(2) 甲苯可见光反应机理

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模糊超图相似性测度及其在决策中的应用

计算机仿真 2024年第2期41卷 373-379,429页

作者：党明聪耿生玲青海师范大学计算机科学与技术学院青海西宁810016 藏语智能信息处理及应用国家重点实验室青海西宁810008 青海省人民政府-北京师范大学高原科学与可持续发展研究院青海西宁810016

相似性度量在模糊环境中起着重要作用。通过距离测度进行相似性判断的方法通常利用两个模糊系统间的欧几里得距离,明科夫斯基距离和曼哈顿距离进行测度。引入一种新的基于欧几里得距离求解模糊集距离相似性测度的方法,通过分析将此方法... 详细信息

相似性度量在模糊环境中起着重要作用。通过距离测度进行相似性判断的方法通常利用两个模糊系统间的欧几里得距离,明科夫斯基距离和曼哈顿距离进行测度。引入一种新的基于欧几里得距离求解模糊集距离相似性测度的方法,通过分析将此方法推广至模糊超图。并提出了三种与模糊集和模糊超图相关的算法。使用此算法可以应对不同类型的决策分析。为了检验上述方法的效率与可靠性,利用多个实例进行验证,证明了所提出新的距离相似性测度方法的合理性和有效性。

关键词：相似性模糊集模糊超图距离相似性测度拟合函数

Reaction mechanism of lanthanum nitrate-doped Mo–La material during solid–liquid spray doping processing

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Rare Metals 2015年第11期34卷 814-817页

作者： Peng-Fa Feng Qin-Li Yang Xiao-ming dang Sha Xi Ya-Qi Wang Jinduicheng Molybdenum Co. Ltd

At three critical temperatures which were obtained by thermo-gravimetry-differential thermal analysis–differential scanning calorimetry（TG/DTG/DSC）curves of lanthanum nitrate crystal, the air thermal decomposition experiments and solid–liquid spray doping simulation procedures of lanthanum nitrate crystal were carried out, and their products were analyzed by X-ray diffraction（XRD）. Meanwhile, the spray doping processing of Mo O2–50 wt% La（NO3）3composite powder was undergone with lanthanum nitrate solution as the dopant,and doped Mo O2powder was analyzed by XRD. The results demonstrate that during the traditional solid–liquid spray doping processing, lanthanum nitrate, in the form of either crystal or aqueous solution, would be converted into La（NO3）3á4H2O by the dehydration reaction, rather than be decomposed to La2O3and NO or NO2. Therefore, it is inferred that the oxynitride gas produced from the process is attributed to the decomposition of residual HNO3in lanthanum nitrate crystal. The source of HNO3is supported by the chemical composition of lanthanum nitrate crystal.

关键词： Solid–liquid spray doping processing Mo O2 Lanthan

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天南星和虎掌南星胆汁炮制前后毒性对比研究

中药药理与临床 2024年第3期40卷 83-91,48页

作者：武旭钟恋王晶邹婷杨凯雷晗丹党明贺素容张桥卫培峰赵重博陕西中医药大学陕西省中药饮片工程技术研究中心咸阳712046 陕西省中药炮制技术传承基地咸阳712046 四川省药品检验研究院成都611137 陕西中医药大学第二附属医院咸阳712046 西安大兴医院西安710000

目的:探讨胆汁制天南星和虎掌南星前后的急性毒性、刺激性和燥性效应变化。方法:将132只小鼠随机分组后进行急性毒性试验;39只家兔随机分组后进行兔眼刺激试验;104只大鼠随机分组进行燥性试验。以小鼠中毒表现、兔眼刺激评分和大鼠的饮... 详细信息

目的:探讨胆汁制天南星和虎掌南星前后的急性毒性、刺激性和燥性效应变化。方法:将132只小鼠随机分组后进行急性毒性试验;39只家兔随机分组后进行兔眼刺激试验;104只大鼠随机分组进行燥性试验。以小鼠中毒表现、兔眼刺激评分和大鼠的饮水量、排尿指数、大便含水率和颌下腺、肾脏、结肠的病理变化以及水通道蛋白5(Aquaporin5,AQP5)、AQP2、AQP3的表达、血浆粘度、血清中环磷腺苷/环磷酸鸟苷(adenosine cyclic 3’,5’-hydrogen phosphate/current good manufacture practices,cAMP/cGMP)、三磷酸腺苷酶(ATPase,Na^(+)-K^(+)-ATP酶)、血浆中的肌酐(Cr)和尿素氮(BUN)含量等指标进行考察。结果:天南星和虎掌南星胆汁炮制前后的水煎液对小鼠灌胃无毒性,小鼠最大耐受量生品均为108 g/kg,炮制品均为75.6 g/kg。胆汁炮制后对家兔眼刺激的作用显著减弱(P<0.05);天南星和虎掌南星对正常大鼠结肠、颌下腺、肾脏有明显损伤作用;显著升高血浆中Cr和BUN的含量(P<0.05或P<0.01),胆汁炮制后对正常大鼠结肠、颌下腺、肾脏组织损伤作用较弱。天南星和虎掌南星可使正常大鼠血液中cAMP/cGMP、Na^(+)-K^(+)-ATP酶含量和肾脏、结肠、颌下腺组织中水通道蛋白(AQP2、AQP3、AQP5)表达异常(P<0.05或P<0.01),使正常大鼠出现水液代谢紊乱、血液黏度增加、排尿指数增加、排便量减少、大便干结(P<0.05或P<0.01),各胆汁制南星组大鼠相应的指标考察中发现与生品相比其作用较弱。结论:胆汁炮制可使天南星和虎掌南星刺激性和燥性减弱,本研究可为天南星的“炮制缓燥”和“炮制减毒”提供科学依据。

关键词：天南星虎掌南星牛胆汁胆南星燥性毒性

Fluctuations in the rate of autopsy in China

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Chinese Medical Journal 2011年第20期124卷 3403-3407页

作者： ZHU ming-hua YU dang-hui Department of Pathology Changhai Hospital Second MilitaryMedical University Shanghai 200433 China

Autopsy has played a unique role in the progression of clinical medicine, medical education, epidemiology, and public health. However, the autopsy rate has been decreasing during the past several decades worldwide, and its necessity is frequently argued. Autopsy-based research in China, a country with the world＇s largest population, is very important for studying the spectrum and epidemiology of diseases as well as for discovering new diseases. This article summarizes the brief history of autopsy in China and analyzes the cause of its decline in recent decades by reviewing previously published papers, review articles, self-collected materials, and private correspondence. Since the first officially permitted autopsy in 1913, China witnessed the highest autopsy rate between 1950 and 1970, and since then the autopsy rate began to decline as it in other parts of the world. The main reasons for the reduction in autopsy rates in China include negligence by hospital administrators and relevant government authorities, unmotivated clinicians, helpless pathologists, unenforceable regulations and laws, and local cultures and customs.

关键词： autopsy health policy pathology

乡村振兴背景下乡村三生空间环境改善策略研究——以利辛县西潘楼镇刘营村为例

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皖西学院学报 2024年第2期40卷 98-103,114页

作者：姚玉敏朱雅婷关振党名韩旭阳喻淑琳安徽建筑大学建筑与规划学院安徽合肥230601

村庄作为我国乡村政治、经济与社会活动的基本空间单元,与三生空间有着密不可分的联系,在全面实施乡村振兴的重大战略背景下,对利辛县西潘楼镇刘营村三生空间进行分析,提取出村内存在的生产、生活、生态问题,采用定性与定量相结合的研... 详细信息

村庄作为我国乡村政治、经济与社会活动的基本空间单元,与三生空间有着密不可分的联系,在全面实施乡村振兴的重大战略背景下,对利辛县西潘楼镇刘营村三生空间进行分析,提取出村内存在的生产、生活、生态问题,采用定性与定量相结合的研究方法,分析其产生原因并结合现状问题从风景园林专业角度提出可行的解决策略,以期促进村庄内三生空间的融合,为未来乡村规划体系构建提供参考依据。

关键词：三生空间乡村振兴乡村景观国土空间规划优化策略

Microcosm study on fate and dynamics of mangrove tannins during leaf litter leaching

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Ecological Processes 2023年第1期12卷 520-533页

作者： Hai-Chao Zhou Hui-Xing Kang Jian Wei Chang-Jun Gao Muzammil Hussain Yi-Jian Fu ming-dang Li Feng-Lan Li Steven Jing-Liang Xu Fred Wang-Fat Lee ming-Guo Jiang Yi-Bing Wang Xiao-Xia Chen Nora Fung-Yee Tam Tao Lang Greater Bay Area Coastal Mangrove Wetland Research&Development Centre MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay AreaCollege of Life Sciences and OceanographyShenzhen UniversityShenzhen 518060China Institute of Ecology College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of Ministry of EducationPeking UniversityBeijing 100091China Guangdong Provincial Key Laboratory of Silviculture Protection and UtilizationGuangdong Academy of ForestryGuangzhou 510520China School of Science and Technology The Hong Kong Metropolitan UniversityKowloonHong Kong 999077SARChina Guangxi Key Laboratory for Polysaccharide Materials and Modifications School of Marine Sciences and BiotechnologyGuangxi Minzu UniversityNanning 530008China State Key Laboratory of Marine Pollution City University of Hong KongKowloonHong Kong 999077SARChina

Background Mangrove tannins can participate in wetland biogeochemical ***,their fate and dynamics during leaf litter leaching have yet to be elucidated in coastal aquatic *** By using a simulated microcosm experiment,changes in leaf litter mass and tannin compounds,including total phenolics(TP),extractable condensed tannins(ECT),and bound condensed tannins(BCT),were examined in the litters and leachates of four common mangrove species:Kandelia obovata(Ko),Aegiceras corniculatum(Ac),Sonneratia apetala(Sa),and Avicennia marina(Am).Results Leaching caused a notable decline in litter mass,TP,and ECT in the leaf litter of Ko,Ac,Sa,and Am,while BCT increased significantly in Ko and *** in foliar TP was higher than in leaf litter mass,and loss in foliar ECT was higher than in TP of Ko and Ac,but Sa showed the opposite *** temporal changes of TP and ECT concentrations in leachates followed a similar trend,with an initial increase followed by a *** dynamics in Ko and Ac leachates correlated with their TP concentrations,while in Sa leachate,the peak ECT occurred 72 h later than its TP *** leachate ECT concentrations were highest in Ac,followed by Ko,and significantly lower in *** peak TP and ECT proportions in leachates accounted for 9.2-23.9%and 7.7-9.4%of the total decreases in foliar TP and ECT,*** During the leaching process,tannins’fate was species-specific,while the dynamics were almost similar.

关键词： Mangrove tannins Leaf litter decomposition Leaching Total phenolics Condensed tannins

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Sequentially bridged MXene platelets for strong high‐temperature EM‐IR bi‐stealth sheets

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SmartMat 2024年第1期5卷 121-134页

作者： Yushan Yang Kaicong Chen Yipeng Chen Chao Wang Baokang dang Yingying Li ming Liu Qingfeng Sun College of Chemistry and Materials Engineering Zhejiang A&F UniversityHangzhouChina Guangxi Fenglin Wood Industry Group Co.Ltd NanningChina

Combination of flexible multifunctional stealth technology properties such as electromagnetic(EM)and infrared(IR)stealth is crucial to the development of aerospace,military,and electronic fields,but the synthesis technology still has a significant ***,we have successfully designed and synthesized highly flexible MXene@cellulose lamellae/borate ion(MXCB)sheets with strong high‐temperature EM‐IR bi‐stealth through sequential bridging of hydrogen and covalent *** resultant MXCB sheets display high conductivity and good mechanical features such as flexibility,stretchability,fatigue resistance,and ultrasonic *** sheets have a high tensile strength of 795 ***,MXCB sheets with different thicknesses indicate exceptional high‐temperature thermal‐camouflage *** reduces the radiation temperature of the target object(>300°C)to 100°*** conductivity of MXCB sheet with 3μm thickness is 6108 S/cm and the EM interference(EMI)shielding value is 39.74 *** normalized surface‐specific EMI SE absolute shielding effectiveness(SSE/t)is as high as 39312.78 dB·cm2/g,which remained 99.39%even after 10,000 times repeated *** multifunctional ultrathin MXCB sheets can be arranged by vacuum‐assisted induction to develop EM‐IR bi‐stealth sheet.

关键词： cellulose lamellae EM‐IR bi‐stealth mechanically strong MXene platelets transition metal carbides

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陕西六报的农民工报道框架分析

西北大学学报（哲学社会科学版） 2016年第6期46卷 163-169页

作者：党明辉南京大学新闻传播学院江苏南京210093 西北大学新闻传播学院陕西西安710069

以2013—2014年两年之间陕西六家报纸关于农民工主题的共计2166篇新闻报道为研究对象,进行了计算机辅助文本分析,完成了陕西媒体关于农民工报道的时间演化规律分析,高频词汇统计分析。对以上两项计算机辅助文本统计的结果进行了话语框... 详细信息

以2013—2014年两年之间陕西六家报纸关于农民工主题的共计2166篇新闻报道为研究对象,进行了计算机辅助文本分析,完成了陕西媒体关于农民工报道的时间演化规律分析,高频词汇统计分析。对以上两项计算机辅助文本统计的结果进行了话语框架分析,研究发现以"排斥性""对抗性"为主要特征的农民工"他者"化话语框架得到有效控制,但以"差异性"为主要特征的农民工"他者"化话语框架依然存在;农民工的"生活世界殖民化"特征鲜明,大众媒介建构了"工具"化的农民工框架。

关键词：农民工新市民话语框架他者生活世界殖民化