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Environmental Science and Ecotechnology 2020年第2期2卷 40-47页

作者： Ziqian Zhu Yang Yang anran fang Yu Lou Guojun Xie Nanqi Ren Defeng Xing State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China

Heterotrophic nitrification-aerobic denitrification(HNAD)is essential in diverse nitrogen-transforming *** HNAD is modulated by quorum sensing(QS)systems is still *** QS system in Pseudomonas aeruginosa manipulates colony ***,we described the influence of the Pseudomonas quinolone signal(PQS)and N-acyl-L-homoserine lactone(AHL)on *** HNAD of *** was inhibited by the oversecretion of ***-or PQS-deficient *** mutants had a higher ability for nitrogen *** inhibited heterotrophic nitrification mainly via controlling the activity of nitrite oxidoreductase(NXR)and the depressed aerobic denitrification by regulating the catalytic abilities of nitric oxide reductase(NOR),nitrite reductase(NIR),and nitrate reductase(NAR).The addition of citrate as the sole carbon source increased the nitrogen removal efficiency compared with other carbon ***,as the sole nitrogen source,could be used entirely with only the moderate concentration of PQS *** and PQS controlled both nitrification and denitrification,suggesting that QS plays an important role in nitrogen cycle under aerobic conditions.

关键词： Heterotrophic nitrification-aerobic denitrification Quorum sensing Pseudomonas aeruginosa Nitrogen cycle Wastewater treatment

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异常值和未知观测噪声鲁棒的卡尔曼滤波器

系统工程与电子技术 2021年第3期43卷 593-602页

作者：方安然李旦张建秋复旦大学电磁波信息科学教育部重点实验室上海200433 复旦大学电子工程系上海200433

给出了对异常值和未知分布的观测噪声鲁棒的卡尔曼滤波器。分析表明当以Huber损失函数替代推导卡尔曼滤波器最大后验准则中观测误差的l2范数时,就构造了一个新的准则。由于Huber损失函数可同时描述l1和l2范数,因此由这个新准则推导的卡... 详细信息

给出了对异常值和未知分布的观测噪声鲁棒的卡尔曼滤波器。分析表明当以Huber损失函数替代推导卡尔曼滤波器最大后验准则中观测误差的l2范数时,就构造了一个新的准则。由于Huber损失函数可同时描述l1和l2范数,因此由这个新准则推导的卡尔曼滤波器,在具有传统卡尔曼滤波器性质的同时,也有了l1范数对异常值鲁棒的特性。而当含异常值的观测噪声统计分布未知时,利用含未知参数的高斯混合模型描述其分布以及变分贝叶斯推理,提出了对异常值和未知统计分布观测噪声鲁棒的卡尔曼滤波器。仿真和实验在验证了分析结果正确的同时,也表明提出算法的性能优于现有文献报道鲁棒类的卡尔曼滤波器。

关键词：卡尔曼滤波器 Huber损失函数高斯混合分布期望最大化算法变分贝叶斯

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异常值和未知观测噪声鲁棒的非线性滤波器

航空学报 2021年第7期42卷 525-538页

作者：方安然李旦张建秋复旦大学智慧网络系统研究中心上海200433 复旦大学电子工程系上海200433 上海市空间智能控制技术重点实验室上海201101

针对含异常观测值的非线性系统滤波问题,以Huber损失函数替代推导滤波器最大后验准则中观测误差的l2范数,构造出了一种新的优化准则函数,从而给出了一种对异常值鲁棒的非线性后验线性化滤波器。分析表明:由于Huber损失函数兼具l1和l2范... 详细信息

针对含异常观测值的非线性系统滤波问题,以Huber损失函数替代推导滤波器最大后验准则中观测误差的l2范数,构造出了一种新的优化准则函数,从而给出了一种对异常值鲁棒的非线性后验线性化滤波器。分析表明:由于Huber损失函数兼具l1和l2范数的性质,从而使得由这个新准则推导出的滤波器,不仅具有l2范数的低误差拟合性,也具备l1范数对异常值的鲁棒性。而当观测噪声的分布未知时,通过引入箱线图法检测异常值,并对噪声统计分布的参数进行估计,进一步提出了对异常值和未知观测噪声分布鲁棒的非线性后验线性化滤波器。仿真实验验证了分析结果的有效性,并表明本文算法的性能优于现有文献报道的非线性滤波算法。

关键词：鲁棒滤波 Huber函数箱线图卡尔曼滤波非线性滤波

L-半胱氨酸对自养脱氮EGSB反应器启动过程的影响

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给水排水 2020年第S02期46卷 242-248页

作者：房安然冯堃邢德峰哈尔滨工业大学环境学院哈尔滨150090 哈尔滨工业大学城市水资源与水环境国家重点实验室哈尔滨150090

低碳氮比污水脱氮是城市污水处理的主要难题之一。自养脱氮技术由于不需要有机碳源和能耗低等优势,成为近年来污水处理研究的热点。本研究以EGSB反应器构建了自养脱氮工艺系统,解析了L-半胱氨酸对自养脱氮反应器的启动速度、脱氮效率和... 详细信息

低碳氮比污水脱氮是城市污水处理的主要难题之一。自养脱氮技术由于不需要有机碳源和能耗低等优势,成为近年来污水处理研究的热点。本研究以EGSB反应器构建了自养脱氮工艺系统,解析了L-半胱氨酸对自养脱氮反应器的启动速度、脱氮效率和微生物群落结构等的影响。试验结果显示,以活性污泥作为接种物经过120d的启动过程,EGSB反应器的氨氮去除率达95.4%,亚硝酸盐去除率可达79.7%,总氮去除率可达72.7%。L-半胱氨酸的添加加快了反应器对高浓度N进水的适应速度,同时L-半胱氨酸有利于维持反应器处于较低溶解氧水平。Illumina Hiseq测序结果显示两个EGSB反应器中的主要优势菌属是不同类型的氮转化细菌,未添加L-半胱氨酸的反应器AnS1中以反硝化菌Rhodanobacter为主,而添加了L-半胱氨酸的反应器AnS2中以自养型菌属Nitrospira为主。本研究表明L-半胱氨酸有利于自养脱氮反应器的启动和氮转化微生物的富集。

关键词：自养型脱氮厌氧氨氧化高通量测序 L-半胱氨酸污水脱氮

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胞外多糖产生菌的筛选鉴定及其促生改土作用

微生物学通报 2023年第5期50卷 1941-1957页

作者：李慧芬方安然冯海霞黄剑赵明珠周波青岛尚德生物技术有限公司山东青岛266111 青岛红樱桃生物技术有限公司山东青岛266111 泰安市土壤肥料工作站山东泰安271018 山东农业大学生命科学学院山东泰安271018

【背景】一些微生物具有较强的产胞外多糖潜力,在改良盐碱土壤、促进作物生长方面潜力巨大。【目的】筛选耐盐碱且产胞外多糖的微生物,为开发具有盐碱土壤改良效果的菌剂提供菌种资源。【方法】从滨海盐碱植物根际土中筛选可在盐碱土壤... 详细信息

【背景】一些微生物具有较强的产胞外多糖潜力,在改良盐碱土壤、促进作物生长方面潜力巨大。【目的】筛选耐盐碱且产胞外多糖的微生物,为开发具有盐碱土壤改良效果的菌剂提供菌种资源。【方法】从滨海盐碱植物根际土中筛选可在盐碱土壤中增殖、产胞外多糖、解有机磷和钾等能力的微生物菌株,并通过形态、生理生化、基于16S rRNA基因序列和gyrB基因的分子鉴定确定菌株类别,分析该菌株的生长、产胞外多糖特性受盐碱胁迫的影响,考察该菌对盐碱土壤不同粒径团聚体比例的影响,并结合盐碱土壤番茄种植试验考察对植物生长指标和土壤指标的影响。【结果】从727株滨海盐碱土壤菌株中筛选出一株产胞外多糖、具有较强盐碱土壤增殖能力且能解有机磷和钾的芽孢杆菌GBW HF-98,确定该菌为枯草芽孢杆菌沙漠亚种(Bacillus subtilis ***)。该菌可耐受pH值达10.0和NaCl浓度达110 g/L,在改善轻和中盐度土壤中不同粒径团聚体比例的效果较为显著。该菌的高剂量浓度T2组,在中度盐碱土壤的番茄种植试验中,与对照相比显著增加了壮苗指数、根干重、全株干重、茎粗和株高等指标,增幅分别为33.8%、59.3%、37.2%、12.3%和15.6%(P<0.05);显著降低pH、全盐含量和土壤容重,降幅分别为8.9%、27.9%和17.9%;显著提升土壤速效磷和速效钾指标,增幅分别为36.0%和17.4%(P<0.05)。【结论】GBW HF-98菌株具有较强的胞外多糖产生能力,在中度盐碱土壤中促进番茄生长和改良土壤的效果显著,可用于盐碱土壤改良菌剂的研制。

关键词：耐盐碱胞外多糖土中增殖解磷解钾土壤改良

Heterostructured bimetallic phosphide nanowire arrays with latticetorsion interfaces for efficient overall water splitting

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Journal of Energy Chemistry 2023年第2期77卷 420-427,I0011页

作者： Hua Zhang Hongyi Li Yintang Zhou fang Tan Ruijie Dai Xijun Liu Guangzhi Hu Laiming Jiang anran Chen Renbing Wu School of Materials and Energy Institute for Ecological Research and Pollution Control of Plateau LakesSchool of Ecology and Environmental ScienceYunnan UniversityKunming 650091YunnanChina Department of Materials Science Fudan UniversityShanghai 200433China Guangzhou Panyu Polytechnic Guangzhou 511483GuangdongChina National Engineering Research Center for Marine Aquaculture Marine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316004ZhejiangChina MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004GuangxiChina Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationSichuan UniversityChengdu 610065SichuanChina

Designing cost-effective and high-efficiency electrocatalysts is critical to the water splitting performance during hydrogen ***,we have developed Fe_(2)P-Co_(2)P heterostructure nanowire arrays with excellent lattice torsions and grain boundaries for highly efficient water *** to the microstructural investigations and theoretical calculations,the lattice torsion interface not only contributes to the exposure of more active sites but also effectively tunes the adsorption energy of hydrogen/oxygen intermediates via the accumulation of charge *** a result,the Fe_(2)P-Co_(2)P heterostructure nanowire array exhibits exceptional bifunctional catalytic activity with overpotentials of 65 and 198 mV at 10 mA cm^(-2) for hydrogen and oxygen evolution reactions,***,the Fe_(2)P-Co_(2)P/NF-assembled electrolyzer can deliver 10 mA cm^(-2) at an ultralow voltage of1.51 V while resulting in a high solar-to-hydrogen conversion efficiency of 19.8%in the solar-driven water electrolysis cell.

关键词： Transition metal phosphide Lattice torsion Heterogeneous interfaces Water splitting Theoretical calculation

Atomistic Surface Passivation of CH_(3)NH_(3)PbI_(3) Perovskite Single Crystals for Highly Sensitive Coplanar-Structure X-Ray Detectors

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Research 2020年第1期2020卷 956-965页

作者： Yilong Song Liqi Li Weihui Bi Mingwei Hao Yifei Kang anran Wang Zisheng Wang Hanming Li Xiaohui Li Yanjun fang Deren Yang Qingfeng Dong State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Organic-inorganic halide perovskites(OIHPs)are recognized as the promising next-generation X-ray detection ***,the device performance is largely limited by the ion migration issue of ***,we reported a simple atomistic surface passivation strategy with methylammonium iodide(MAI)to remarkably increase the ion migration activation energy of CH_(3)NH_(3)PbI_(3)single *** amount of MAI deposited on the crystal surface is finely regulated by a self-assemble process to effectively suppress the metallic lead defects,while not introducing extra mobile ions,which results in significantly improved dark current stability of the coplanar-structure devices under a large electric field of 100Vmm^(-1).The X-ray detectors hence exhibit a record-high sensitivity above 700,000μC Gy^(-1)_(air) cm^(-2)under continuum X-ray irradiation with energy up to 50 keV,which enables an ultralow X-ray detection limit down to 1.5 nGy_(air)s^(-1).Our findings will allow for the dramatically reduced X-ray exposure of human bodies in medical imaging applications.

关键词： Highly planar hence

Detector-grade perovskite single-crystal wafers via stress-free gel-confined solution growth targeting high-resolution ionizing radiation

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Light(Science & Applications) 2023年第5期12卷 754-765页

作者： Yilong Song Lixiang Wang Yongqiang Shi Weihui Bi Jianwu Chen Mingwei Hao anran Wang Xueying Yang Yuan Sun Fan Yu Liansheng Li Yanjun fang Deren Yang Qingfeng Dong State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Beijing Institute of Control Engineering Beijing 100190China Science and Technology on Space Intelligent Control Laboratory Beijing 100190China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030024China

Solution-processed organic‒inorganic halide perovskite(OIHP)single crystals(SCs)have demonstrated great potential in ionizing radiation detection due to their outstanding charge transport properties and low-cost ***,the energy resolution(ER)and stability of OIHP detectors still lag far behind those of melt-grown inorganic perovskite and commercial CdZnTe counterparts due to the absence of detector-grade high-quality OIHP ***,we reveal that the crystallinity and uniformity of OIHP SCs are drastically improved by relieving interfacial stress with a facial gel-confined solution growth strategy,thus enabling the direct preparation of large-area detector-grade SC wafers up to 4 cm with drastically suppressed electronic and ionic *** resultant radiation detectors show both a small dark current below 1 nA and excellent baseline stability of 4.0×10^(-8) nA cm^(-1) s^(-1) V^(-1),which are rarely realized in OIHP ***,a record high ER of 4.9% at 59.5 keV is achieved under a standard 241Am gamma-ray source with an ultralow operating bias of 5 V,representing the best gamma-ray spectroscopy performance among all solution-processed semiconductor radiation detectors ever reported.

关键词： resolution confined stress

Aromatization over nanosized Ga-containing ZSM-5 zeolites prepared by different methods:Effect of acidity of active Ga species on the catalytic performance

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Journal of Energy Chemistry 2017年第4期26卷 768-775页

作者： Yujun fang Xiaofang Su Xuefeng Bai Wei Wu Gaoliang Wang Linfei Xiao anran Yu National Center for International Research on Catalytic technology Key Laboratory of Chemical Engineering Process&Technology for High-efficiency ConversionCollege of Heilongjiang ProvinceSchool of Chemistry and Material SciencesHeilongjiang UniversityHarbin 150080HeilongjiangChina

Nanosized Ga-containing ZSM-5 zeolites were prepared via isomorphous substitution and impregnation followed by characterized using various techniques. The catalytic performance of the zeolites for the aromatization of 1-hexene was investigated. The results indicate that isomorphous substitution promotes the incorporation of Ga heteroatoms into the framework along with the formation of extra-framework GaO;species（[GaO;]a） that have stronger interactions with the negative potential of the framework. In addition, based on the Py-IR results and catalytic performance, the [GaO;]aspecies with stronger Lewis acid sites produced a better synergism with moderate Br?nsted acid sites and thus improved the selectivity to aromatic compounds. However, the impregnation results in the formation of Ga;O;phase and small amounts of GaO;species that are mainly located on the external surface（[GaO;];）, which contribute to weaker Lewis acid sites due to weaker interactions with the zeolite framework. During 1-hexene aromatization, the nanosized Ga isomorphously substituted ZSM-5 zeolite samples（Gax-NZ5） exhibited better catalytic performance compared to the impregnated samples, and the highest aromatic yield（i.e.,65.4 wt%） was achieved over the Ga4.2-NZ5 sample, which contained with the highest Ga content.

关键词： Nanosized ZSM-5 zeolite Isomorphous substitution Impregnation Active gallium species Aromatization

Epidemiological and Clinical Features of Patients with Scrub Typhus—Guangzhou City,Guangdong Province,China,2012–2018

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China CDC weekly 2021年第51期3卷 1079-1083,I0001-I0006页

作者： Yuehong Wei Xiugang Guan Shixia Zhou anran Zhang Qingbin Lu Ziwei Zhou Jinjin Chen Haiyang Zhang Yang Ji Baogui Jiang Yang Yang Zhicong Yang Hao Li Liqun fang Wei Liu Guangzhou Center for Disease Control and Prevention GuangzhouGuangdongChina State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and EpidemiologyBeijingChina School of Public Health Anhui Medical UniversityHefeiAnhuiChina School of Public Health Cheeloo College of MedicineShandong UniversityJinanShandongChina Department of Laboratorial Science and Technology School of Public HealthPeking UniversityBeijingChina Department of Biostatistics College of Public Health and Health Professionsand Emerging Pathogens InstituteUniversity of FloridaFloridaUSA

Summary What is already known about this topic?Scrub typhus(ST)causes public health challenges in the“tsutsugamushi triangle”in the Asia-Pacific area greater than 13 million square kilometers,affecting an estimated one million people each *** is added by this report?A retrospective study based on 4,501 hospitalized patients with ST in Guangzhou City,China,described the epidemiological and clinical characteristics,laboratory findings of ST.

关键词： Guangzhou triangle Guangdong