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Enhanced efficiency and stability in Sn-based perovskite solar cells with secondary crystallization growth

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Journal of Energy Chemistry 2021年第3期30卷 414-421页

作者： Zhixin Jin Bin-Bin Yu Min liao Di Liu Jingwei Xiu Zheng Zhang Efrat Lifshitz Jiang Tang Haisheng Song Zhubing He Department of Materials Science and Engineering Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation(FSSEG)Southern University of Science and TechnologyNo.1088Xueyuan Rd.Shenzhen 518055GuangdongChina Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyLuoyu Road 1037Wuhan 430074HubeiChina Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055GuangdongChina Schulich Faculty of Chemistry Russell Berrie Nanotechnology Institute Solid State InstituteTechnion Haifa32000Israel

The conversion efficiencies reported for Tin(Sn)halide-based perovskite solar cells(PSCs)fall a large gap behind those of lead halide-based PSCs,mainly because of poor film quality of the *** we report an efficient strategy based on a simple secondary crystallization growth(SCG)technique to improve film quality for tin halide-based PSCs by applying a series of functional amine chlorides on the perovskite *** were discovered to enhance the film crystallinity and suppress the oxidation of Sn^(2+)remarkably,hence reduce trap state density and non-irradiative recombination in the absorber ***,the SCG film holds the band levels matching better with carrier transport layers and herein favoring charge extraction at the device ***,a champion device efficiency of 8.07% was achieved alo ng with significant enhancements in VOC and JSC,in contrast to 5.35% of the control device ***,the SCG film-based devices also exhibit superior stability comparing with the control *** work explicitly paves a novel and general strategy for developing high performance lead-free PSCs.

关键词： Tin based perovskite solar cells Secondary crystallization growth Amine chloride Non-irradiative recombination Energy band levels matching

基于EnKF融合地球物理数据刻画含水层非均质性

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水科学进展 2018年第1期29卷 40-49页

作者：康学远施小清邓亚平廖凯华吴吉春南京大学地球科学与工程学院表生地球化学教育部重点实验室中国科学院南京地理与湖泊研究所中国科学院流域地理学重点实验室

含水层非均质性的刻画是模拟地下水中污染物运移的关键。以渗透系数为研究对象,构建了综合集合卡尔曼滤波方法、有效电阻率模型与地下水运移模型的同化框架,通过融合地球物理观测数据与污染物浓度观测数据来推估渗透系数的空间分布。基... 详细信息

含水层非均质性的刻画是模拟地下水中污染物运移的关键。以渗透系数为研究对象,构建了综合集合卡尔曼滤波方法、有效电阻率模型与地下水运移模型的同化框架,通过融合地球物理观测数据与污染物浓度观测数据来推估渗透系数的空间分布。基于理想算例,验证了该同化框架刻画含水层非均质渗透系数场的有效性,并针对不同初始参数信息与观测类型对比了耦合与非耦合水文地球物理方法的适用性。研究结果表明:基于集合卡尔曼滤波方法同化多种类型的观测数据,可有效地推估非均质参数空间分布。当初始信息较准确时,耦合方法的参数推估精度更高;初始信息存在偏差时,非耦合方法有更好的同化效果。由于非耦合方法计算成本较低且对初始信息缺失时适用性更强,在实际应用中可先基于非耦合方法初步估计参数,再利用耦合方法进一步提高参数推估精度。融合多种类型观测数据可有效提高参数推估效果。

关键词：水文地球物理集合卡尔曼滤波参数估计地下水-水文地球物理模型耦合渗透系数

考虑N-K故障下系统频率稳定性的储能电站优化规划

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智慧电力 2022年第6期50卷 8-13页

作者：谢学渊廖长风詹世军李勇陈杰国网湖南综合能源服务有限公司湖南长沙410001 湖南大学湖南长沙410082 湖南迪泰尔综合能源规划设计有限公司湖南长沙410001

风电、光伏等新能源通过逆变器并入电网,不具有惯量支撑能力,因此大规模新能源接入电网会降低系统的惯量水平。在N-K故障下,系统可能因惯量水平过低而频率失稳,导致电源脱网,给系统造成严重经济损失。针对此问题,提出一种考虑N-K故障下... 详细信息

风电、光伏等新能源通过逆变器并入电网,不具有惯量支撑能力,因此大规模新能源接入电网会降低系统的惯量水平。在N-K故障下,系统可能因惯量水平过低而频率失稳,导致电源脱网,给系统造成严重经济损失。针对此问题,提出一种考虑N-K故障下系统频率稳定性的储能电站优化规划方法。首先,分析系统惯量与系统频率变化的关系,给出系统惯量需求约束。其次,充分考虑储能电站在系统中调频、调峰及潮流调度等应用场景,以储能电站建设成本及极端故障下切负荷成本最小为目标函数,构建储能电站定容选址优化模型。最后,以IEEE 39节点系统为仿真算例。仿真结果表明,基于所提方法的定容选址规划方案能够有效提升系统频率稳定性,缓解系统在极端故障下的大面积停电问题。

关键词：频率稳定性惯量储能电站优化规划

Study on RNAi-based herbicide for Mikania micrantha

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Synthetic and Systems Biotechnology 2021年第4期6卷 437-445页

作者： Jiantao Mai Lingling liao Rongsong Ling Xiaolong Guo Jingying Lin Beixin Mo Weizhao Chen Yu Yu Guangdong Provincial Key Laboratory for Plant Epigenetics Longhua Bioindustry and Innovation Research InstituteCollege of Life Sciences and OceanographyShenzhen University1066 Xueyuan AvenueShenzhen518000PR China Institute for Advanced Study Shenzhen University3688 Nanhai AvenueShenzhen518000PR China College of Materials Science and Engineering Shenzhen University1066 Xueyuan AvenueShenzhen518000PR China Shenzhen Key Laboratory for Microbial Gene Engineering College of Life Sciences and OceanographyShenzhen UniversityShenzhen518060PR China

The invasive plant Mikania micrantha Kunth(***)from South America poses a significant threat to the stability and biodiversity of ***,an effective and economical method to control *** is still *** interference(RNAi)has been widely studied and applied in agriculture for trait ***-induced gene silencing(SIGS)can produce RNAi silencing effects without introducing heritable modifications to the plant genome and is becoming a novel nontransformation strategy for plant *** this study,the genes encoding chlorophyll a/b-binding proteins were selected as targets of RNAi,based on high-throughput sequencing of *** transcriptome and bioinformatic analyses of sequence *** types of RNAi molecules,double-stranded RNA,RNAi nanomicrosphere,and short hairpin RNA(shRNA),with their corresponding short interfering RNA sequences were designed and synthesized for SIGS vector construction,from which each RNAi molecule was transcribed and extracted to be sprayed on *** *** water-treated control leaves remained green,leaves treated with RNAi molecules turned yellow and eventually *** real-time PCR showed that the expression levels of target genes were significantly reduced in the RNAi-treated groups compared with those of the control,suggesting that all three types of RNAi herbicides effectively silenced the endogenous target genes,which are essential for the growth of *** also found that shRNA showed better silencing efficiency than the other two *** together,our study successfully designed three types of RNAi-based herbicides that specifically silenced endogenous target genes and controlled the growth of ***,we identified a gene family encoding chlorophyll a/b-binding proteins that is important for the growth and development of *** and could serve as potential targets for controlling the spread of ***.

关键词： Invasive plant Mikania micrantha RNA interference Spray-induced gene silencing Chlorophyll a/b-binding protein Nucleic acid bioherbicide

Paleoproterozoic Nb-enriched meta-gabbros in the Quanji Massif,NW China:Implications for assembly of the Columbia supercontinent

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Geoscience Frontiers 2018年第2期9卷 577-590页

作者： Fan-Xi liao Neng-Song Chen M.Santosh Qin-Yan Wang Song-Lin Gong Chuan He Hassan Abdelsalam Mustafa Institute of Geophysics and Geomatics China University of GeosciencesWuhan 430074China School of Earth Sciences China University of GeosciencesWuhan 430074China International Research Center for Geology and Resources along the Silk Roads China University of GeosciencesWuhan 430074China State Key Lab of Geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China Centre for Tectonics Resources and ExplorationDepartment of Earth SciencesUniversity of AdelaideSA 5005Australia School of Earth Sciences and Resources China University of Geosciences Beijing29 Xueyuan RoadBeijing 100083China School of Earth Sciences Zhejiang UniversityHangzhou310027China Three Gorges Geological Hazards Research Center Ministry of EducationChina University of GeosciencesWuhan 430074China Faculty of Science University of KordofanEL ObeidP.O 160Sudan

Diverse models have been proposed for the role of the Tarim Craton within the Paleoproterozoic Columbia supercontinent assembly. Here we report a suite of-1.71 Ga Nb-enriched meta-gabbro lenses in the eastern Quanji Massif, within the Tarim Craton in NW China. The meta-gabbroic rocks have Nb contents of 11.5-16.4 ppm with Nb/La ratios varying from 0.84 to 1.02((Nb/La)_N = 0.81-0.98) and Nb/U ratios from 38.0 to 47.2. They show low SiO_2(45.1-48.5 wt.%) and MgO(5.96-6.81 wt.%) and Mg#(Mg# = Mg/(Mg + Fe) = 43.5-47.7), high FeO^t(13.0-15.7 wt.%) and moderate Ti02(1.70-2.51 wt.%).with tholeiitic affinities. These rocks possess low fractionated REE patterns without obvious Eu anomalies(Eu/Eu~* = 0.87-1.02). Their primitive mantle-normalized elements patterns display significant Zr-Hf troughs, positive Nb anomalies, weak negative Ti and P anomalies, and high contents of Rb and Ba,resembling Nb-enriched basalts generated in arc-related tectonic settings. Their arc-like geochemical signatures together with whole rock εNd(t) values of 0.4-2.1 and corresponding old T_(DM)(2.22-2.37 Ga)as well as(^(143)Nd/^(144)Nd)_t and(^(87)Sr/^(86)Sr)t(t = 1712 Ma) values of 0.5104-0.5105 and 0.7030-0.7058,respectively, suggest that their precursor magma originated from mantle wedge peridotite metasomatised by subduction-derived melts. The results from our study reveal subduction along the eastern periphery of the Tarim Craton and marginal outgrowth continuing to ~1.7 Ga within the Columbia supercontinent.

关键词： Nb-enriched gabbros Geochemistry Quanji Massif Tarim Craton Columbia supercontinent

颈淋巴结清除术前不同剂量131I对甲状腺癌患者唾液腺功能和生活质量的影响及作用机制研究

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癌症进展 2019年第18期17卷 2147-2150页

作者：樊雪缘杨绮周凡廖杰宜宾市第二人民医院核医学科

目的颈淋巴结清除术前不同剂量131I对甲状腺癌患者唾液腺功能和生活质量的影响及作用机制研究。方法采用随机数字表法将64例TC患者分为低剂量组和高剂量组,各32例。所有患者在颈淋巴结清除术前,均给予不同剂量的131I治疗。比较两组患者... 详细信息

目的颈淋巴结清除术前不同剂量131I对甲状腺癌患者唾液腺功能和生活质量的影响及作用机制研究。方法采用随机数字表法将64例TC患者分为低剂量组和高剂量组,各32例。所有患者在颈淋巴结清除术前,均给予不同剂量的131I治疗。比较两组患者的唾液腺功能、生活质量;从两组患者的TC组织中提取细胞并分为低剂量亚组和高剂量亚组,比较两亚组的细胞周期和细胞凋亡率。结果治疗后,两组患者的唾液pH值较治疗前升高,静态唾液流率和动态唾液流率均较治疗前下降,差异均有统计学意义(P﹤0.05)。治疗后,低剂量组患者的唾液pH值低于高剂量组,静态唾液流率和动态唾液流率均高于高剂量组,差异均有统计学意义(P﹤0.05)。治疗后,两组患者的健康调查简表(SF-36)各维度评分均高于本组治疗前,差异均有统计学意义(P﹤0.05);低剂量组患者SF-36量表各维度评分均高于高剂量组,差异均有统计学意义(P﹤0.05)。低剂量亚组的G0/G1期细胞数和细胞凋亡率均明显低于高剂量亚组;S期和G2/M期细胞数均明显高于高剂量亚组,差异均有统计学意义(P﹤0.01)。结论术前1.1~3.7GBq治疗剂量的131I可减轻TC患者唾液腺功能损害,提高生活质量,值得临床借鉴。

关键词： 131I 颈淋巴结清除术甲状腺癌唾液腺功能生活质量

Assessing performance of augmented reality-based neurosurgical training

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Visual Computing for Industry,Biomedicine,and Art 2019年第1期2卷 45-54页

作者： Wei-Xin Si Xiang-Yun liao Yin-Ling Qian Hai-Tao Sun Xiang-Dong Chen Qiong Wang Pheng Ann Heng Guangdong Provincial Key Laboratory of Computer Vision and Virtual Reality Technology Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences1068 Xueyuan AvenueShenzhen University TownShenzhen 518055China Department of Neurosurgery Zhujiang HospitalSouthern Medical UniversityGuangzhou 510282China E.N.T.department of Shenzhen University General Hospital Shenzhen 518055China Department of Computer Science and Engineering the Chinese University of Hong KongHong KongChina

This paper presents a novel augmented reality(AR)-based neurosurgical training simulator which provides a very natural way for surgeons to learn neurosurgical *** simulation with bimanual haptic interaction is integrated in this work to provide a simulated environment for users to achieve holographic guidance for pre-operative *** achieve the AR guidance,the simulator should precisely overlay the 3D anatomical information of the hidden target organs in the patients in real *** this regard,the patient-specific anatomy structures are reconstructed from segmented brain magnetic resonance *** propose a registration method for precise mapping of the virtual and real *** addition,the simulator provides bimanual haptic interaction in a holographic environment to mimic real brain tumor *** this study,we conduct AR-based guidance validation and a user study on the developed simulator,which demonstrate the high accuracy of our AR-based neurosurgery simulator,as well as the AR guidance mode’s potential to improve neurosurgery by simplifying the operation,reducing the difficulty of the operation,shortening the operation time,and increasing the precision of the operation.

关键词： Augmented reality Personalized virtual operative anatomy Neurosurgical training

酒石酸对黏粒矿物上酸性磷酸酶吸附及活性的影响

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土壤学报 2007年第5期44卷 867-872页

作者：赵振华黄巧云廖丽霞夏立玲李学垣河海大学水文水资源与水利工程科学国家重点实验室南京210098 华中农业大学资源与环境学院武汉430070 华南理工大学资源科学与造纸工程学院广州510641 南京工业职业技术学院南京210016

采用平衡批处理法，研究了模拟根系分泌物——酒石酸溶液的浓度（0～80mmol L^-1）、pH（2．5～7．0）对酸性磷酸酶在针铁矿、高岭石及黄棕壤和砖红壤胶体（〈2μm）上的吸附及比活性影响。结果表明，当酒石酸浓度由0mmolL^-1（作为对... 详细信息

采用平衡批处理法，研究了模拟根系分泌物——酒石酸溶液的浓度（0～80mmol L^-1）、pH（2．5～7．0）对酸性磷酸酶在针铁矿、高岭石及黄棕壤和砖红壤胶体（〈2μm）上的吸附及比活性影响。结果表明，当酒石酸浓度由0mmolL^-1（作为对照）升高至80mmolL^-1时，酸性磷酸酶在供试土壤胶体和矿物表面的吸附量先急剧降低（0～5mmolL^-1之间），后逐渐达到平衡；以羟基化表面为主的针铁矿对酸性磷酸酶的吸附百分率受酒石酸浓度的影响最大，吸附百分率从对照的96．2％降至80mmolL^-1酒石酸浓度时的33．7％，其他以层状铝硅酸盐矿物为主的供试土壤胶体和高岭石则受影响较小，吸附百分率从对照的76．3％～60．6％降至80mmolL^-1酒石酸浓度时的56．2％～41．6％。酸性磷酸酶在酒石酸体系中的最大吸附pH点均在该酶的等电点酸侧，这可能与酒石酸对矿物表面的电荷性质改变有关；酒石酸体系中，针铁矿上酸性磷酸酶的比活性远高于其它供试土壤胶体，该酶的最适比活性点随胶体类型的不同而无变化或有所高移。

关键词：酒石酸磷酸酶土壤胶体矿物吸附活性

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江苏富硒土壤元素地球化学特征及主要来源

中国地质 2020年第6期47卷 1813-1825页

作者：廖启林崔晓丹黄顺生黄标任静华顾雪元范健徐宏婷江苏省地质调查研究院江苏南京210018 中国科学院南京土壤研究所江苏南京210008 南京大学环境学院江苏南京210023

有关生态地球化学调查工程的成果应用已经受到高度关注。本文以江苏区域生态地球化学调查工程所获取的土壤、岩石等元素含量数据为基础,探讨了富硒土壤的分布特点、元素地球化学特征、物质来源与成因类型。研究结果显示:(1)全省富硒土壤... 详细信息

有关生态地球化学调查工程的成果应用已经受到高度关注。本文以江苏区域生态地球化学调查工程所获取的土壤、岩石等元素含量数据为基础,探讨了富硒土壤的分布特点、元素地球化学特征、物质来源与成因类型。研究结果显示:(1)全省富硒土壤的Se含量一般介于0.3~15 mg/kg,同时伴有S、TOC、Zn、Sb、Cd、Pb、As、Cr、Ni、Fe等相对富集;(2)富硒土壤可分为原岩风化残积型、煤矸石风化迁移型、湖相沉积型、粉煤灰型、污染叠加型、多金属矿化伴生型等6个成因类型,以产于苏南酸性土壤环境的原岩风化残积型富硒土壤利用价值最高,该类富硒土壤也是天然富硒农产品的主要产地;(3)富硒土壤物质来源具有多源复合性,表现为先天性物质来源(自然)、后天性物质来源(人为)及复合性物质来源(自然与人为叠加)等3种形式;(4)在先天性物质来源所形成的富硒土壤中,Se与S、TOC等呈显著正相关性,且Cd、Zn、Pb、As等未超标,富硒土壤厚度不受耕作层限制、深度可超过2 m。

关键词：富硒土壤元素地球化学来源生态地球化学地质调查工程南京江苏