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Science Bulletin 2010年第20期55卷 2118-2121页

作者： ZHOU AiFeng,SUN HuiLing,CHEN FaHu ,ZHAO Yan,AN ChengBang,DONG GuangHui,WANG ZongLi & CHEN JianHui center for Arid environment and Paleoclimate research,Key Laboratory of Western China’s environmental System(Ministry of education),Lanzhou 730000,China center for Arid environment and Paleoclimate research Key Laboratory of Western China’s Environmental System (Ministry of Education) Lanzhou China

According to a core from Tianchi Lake,Liupan Mountain in Loess Plateau sediment,fossil pollen assemblages,magnetic susceptibility(MS)and color scale were measured based on reliable Abies leaf macrofossils radiocarbon *** recovered a very good high-resolution mid-late Holocene climate change achieve for the transition area of the East Asia monsoon region and northwest arid *** results show that the basic climate background was in agreement with the records from cave records in monsoon regions in eastern ***,it shows more detailed records in abrupt climate change.

关键词： high resolution mid-late Holocene Tianchi Lake

Preparation of Gd_2O_3:Eu^(3+) downconversion luminescent material and its application in dye-sensitized solar cells

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Chinese Science Bulletin 2011年第28期56卷 3114-3118页

作者： LI QingBei LIN JianMing WU JiHuai LAN Zhang WANG JiangLi WANG Yue PENG FuGuo HUANG MiaoLiang XIAO YaoMing Engineering research center of environment-Friendly Functional Materials of the Ministry of education the Key Laboratory for FunctionalMaterials of Fujian Higher Education Institute of Material Physical Chemistry Huaqiao University Quanzhou 362021 China

Gd_2O_3 :Eu^(3+) downconversion luminescent powder was prepared using the homogeneous precipitation method. Its optical properties were analyzed and it was introduced into a dye-sensitized solar cell (DSSC). As a luminescence medium, Gd_2O_3 :Eu^(3+) improved light harvesting via conversion luminescence and increased the photocurrent of the DSSC. As a p-type dopant insulating rare earth oxides form an energy barrier, and the Gd_2O_3 :Eu^(3+) elevated the energy level of the oxide film and increased the photovoltage. The photoelectric conversion efficiency for a DSSC with Gd_2O_3 :Eu^(3+) doping (6 : 100) reached 7.01%, which was 17.4% higher than the photoelectrical conversion efficiency of a DSSC without Gd 2 O 3 :Eu 3+ doping.

关键词：染料敏化太阳能电池氧化钆下变频欧盟发光材料制备光电转换效率应用

Applications of Raman spectroscopy in two-dimensional materials

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Journal of Innovative Optical Health Sciences 2020年第5期3卷 42-62页

作者： Pengkun Yin Qingyu Lin Yixiang Duan College of Life Sciences research center of Analytical Instrumentation Key Laboratory of Bio-resource and Eco-environment Ministry of education Sichuan University 610064 ChengduP.R.China

At present,two-dimensional(2D)materials have shown great application potential in numerous fields based on their physical chemical and electronic *** spectroscopy and de-rivative techniques are effective tools for characterizing 2D *** spectroscopy conveys lots of knowledge on 2D materials,including layer number,doping type,strain and interlayer *** review summarized advanced applications of Raman spectroscopy in 2D *** challenges and possible applied directions of Raman spectroscopy to 2D materials are discussed in detail.

关键词： Raman spectroscopy and derivative techniques monolayer materials nondestructive characterization

Particulate matter emission by an isolated rotating wheel

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Building Simulation 2021年第4期14卷 1163-1173页

作者： Jinwei Song Hua Qian Dongliang Zhao Weixue Jiang Xiaohong Zheng School of Energy and environment Southeast UniversityNanjingChina Engineering research center of Building Equipment Energyand EnvironmentMinistry of EducationBeijingChina College of Electrical Energy and Power EngineeringYangzhou UniversityYangzhouChina Jiangsu Provincial Key Laboratory of Solar Energy Science and Technology School of Energy and EnvironmentSoutheast UniversityNanjing210096China

Particulate matter emission from rotating wheels, which imparts a force to the contact surface and causes strong air currents, is one of the important pollutant sources on the road. This study investigates the particulate matter emission by measuring mass and size distributions of particulate matter near an isolated rotating wheel in a deliberately designed setup. Five rotating speeds from 0.7 m/s to 1.5 m/s are conducted to test its impact on the emission of particulate matter. Mass of particulate matter is measured at twenty-six sampling points around the rotating wheel under different experimental conditions. Experimental results show that the farther away from the wheel, the less of particulate matters deposited on the sampling points in general. Moreover, the emission factor increases from 0.12 g/vkt to 0.24 g/vkt when the rotating speed of the wheel increases from 0.7 m/s to 1.5 m/s. The number and proportion of PM2.5 and PM10 on different sampling points are also measured. The results show that the position of the highest number of PM2.5 and PM10 tends to move to a further and higher sampling point with the increasing of the speed. Moreover, the number proportions of PM2.5 and PM10 on the sampling points range from 19% to 97% and 61% to 100% at different speeds, respectively. This study is believed to be helpful to estimate particulate matter emission and make effective control strategies on targeted pollution.

关键词： particulate matter emission rotating wheel speed

Multiple evidences indicate no relationship between prehistoric disasters in Lajia site and outburst flood in upper Yellow River valley, China

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Science China Earth Sciences 2018年第4期61卷 441-449页

作者： DONG GuangHui ZHANG FanYu LIU FengWen ZHANG DongJu ZHOU AiFeng YANG YiShi WANG GongHui MOE Key Laboratory of Western China's environmental Systems(Ministry of education) College of Earth and Environmental SciencesLanzhou University Key Laboratory of Mechanics on Disaster and environment in Western China (Ministry of education) Department of Geological EngineeringLanzhou University research center on Landslides Disaster Prevention Research InstituteKyoto University

All around the world, ancient legends exist about the Great Flood, and the influence of the Great Flood in human evolutionary history is a hotly debated topic. In China, the legend of the prehistoric Great Flood and Yu the Great's flood control has a long history and is considered to be closely linked to the establishment of the Xia Dynasty. However, there is a lack of solid scientific evidence. Against this issue, some scholars have proposed that an earthquake around 1920 BCE in the Guanting Basin along the upper reaches of the Yellow River led to the creation of a lake by damming in the Jishi Gorge and that the outburst of water from that lake led to the massive flood in the Yellow River region. These studies provided new scientific evidence for the Chinese legend. In this paper, we date skeletal samples embedded in earthquake sand blasting from the Lajia site, analyze remains from natural disasters(such as earthquakes and floods) and also archaeological remains. In addition, we compared the skeletal samples dating with that of sediments from the dammed-up lake. Our results are inconsistent with those of previous scholars. The earthquake at the Lajia site occurred no earlier than 1800 BCE, and the dammed-up lake in Jishi Gorge had disappeared by 3600 BCE. Thus, the formation and outburst of the dammed lake, the sudden death of ancient humans at the Lajia site and the ancient earthquake were independent events occurring at different times. In addition, the massive flood in the upper reaches of the Yellow River did not actually happen. Thus, we argue against and invalidate the hypothesis that the massive flood was related to Yu the Great's flood control and the establishment of the Xia Dynasty.

关键词： Guanting Basin Qijia culture Lajia site Earthquake Outburst flood The establishment of the Xia dynasty

Effects of a Remotely Sensed Land Cover Dataset with High Spatial Resolution on the Simulation of Secondary Air Pollutants over China Using the Nested-grid GEOS-Chem Chemical Transport Model

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Advances in Atmospheric Sciences 2014年第1期31卷 179-187页

作者： LI Mingwei WANG Yuxuan JU Weimin Ministry of education Key Laboratory for Earth System Modeling Center for Earth System Science Institute for Global Change Studies Tsinghua University School of environment Tsinghua University International Institute for Earth System Science Nanjing University

A number of remotely sensed land cover datasets with spatial resolutions ~〈 1 km have recently become available or are in the process of being mapped. The application of these higher resolution and more up-to-date land cover datasets in chemical transport models （CTMs） is expected to improve the simulation of dry deposition and biogenic emissions of non-methane volatile organic compounds （NMVOCs）, which affect ozone and other secondary air pollutants. In the present study, we updated the land cover dataset in the nested-grid GEOS-Chem CTM with the 1 km resolution GLC2000 land cover map and examined the resulting changes in the simulation of surface ozone and sulfate over China in July 2007. Through affecting the dry deposition velocities of ozone and its precursors, using GLC2000 in the dry deposition module can decrease the simulated surface ozone by 3% （up to 6 ppb） over China. Simulated surface sulfate shows an increase of 3% in northwestern China and a decrease of 1% in northern China. Applying GLC2000 in the biogenic emissions of the NMVOC module can lead to a 0.5--4.5 ppb increase in simulated surface ozone over East China, mainly driven by the larger cove~：age of broadleaf trees in East China in the GLC2000 dataset. Our study quantifies the large sensitivity to land cover dataset~ with different spatial resolutions and time periods of simulated secondary air pollutants over China, supporting ongoing research efforts to produce high resolution and dynamically updated land cover datasets over China, as well as for the globe.

关键词： land cover dry deposition biogenic emissions ozone sulfate

Optimization of the pulse width and injection time in a double-pass laser amplifier

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High Power Laser Science and Engineering 2018年第4期6卷 91-97页

作者： Daewoong Park Jihoon Jeong Tae Jun Yu Department of Advanced Green Energy and environment Handong Global University global Institute of Laser Technology Global Green Research and Development CenterHandong Global University

We have optimized the input pulse width and injection time to achieve the highest possible output pulse energy in a double-pass laser amplifier using two Nd:YAG rods. For this purpose, we have extended the Frantz–Nodvik equation by simultaneously including both spontaneous emission and pump energy variation. The effective pump energy of the flash lamp was 8.84 J for each gain medium. The energy of 1 J could be amplified to an output energy of 12.17 J with the maximum achieved extraction efficiency of 63.18% when an input pulse having a pulse width of 168 μs is sent 10 μs after the absorbed pump energy becomes the maximum value.

关键词： Frantz–Nodvik equation input pulse optimization pulse overlap pump energy variation spontaneous emission

Flexible solar cells based on PCBM/P3HT heterojunction

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Frontiers of Optoelectronics 2011年第1期4卷 108-113页

作者： Gentian YUE Jihuai WU Yaoming XIAO Jianming LIN Miaoliang HUANG Engineering research center of environment-Friendly Functional Materials Ministry of Education Institute of Materials Physical ChemistryHuaqiao University

[6,6]-phenyl-C61-butyric acid methyl ester（PCBM）/poly（3-hexylthiophene）(P3HT) heterojunction has not only the absorption in ultraviolet light for PCBM,but also the absorption in visible light for P3HT, which widens the incident light harvest range, improving the photoelectrical response of hybrid solar cell *** conducting polymers blend heterojunction consisting of C60derivatives PCBM and P3HT as charge carrier transferring medium to replace I3–/I–redox electrolyte and dye, a novel flexible solar cell was fabricated in this *** influence of PCBM/P3HT mass ratio on the photovoltaic performance of the solar cell was also *** a simulated solar irradiation of 100 mW·cm–2, the flexible solar cell achieved a light-to-electric energy conversion efficiency of 1.04%, an open circuit voltage of 0.86 V, short circuit current density of 2.6 mA·cm–2and fill factor（FF） of 0.46.

关键词： flexible solar cell heterojunction [6 6]-phenyl-C61-butyric acid methyl ester (PCBM) poly (3-hexylthiophene) (P3HT)

A Differential Optical Absorption Spectroscopy Method for X_(CO_2) Retrieval from Ground-Based Fourier Transform Spectrometers Measurements of the Direct Solar Beam

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Advances in Atmospheric Sciences 2015年第8期32卷 1119-1128页

作者： HUO Yanfeng DUAN Minzheng TIAN Wenshou MIN Qilong Key Laboratory for Semi-Arid Climate Change of the Ministry of education College of Atmospheric Sciences Lanzhou University Key Laboratory of Middle Atmosphere and global environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Wuhan University Atmospheric Science research center State University of New York

A differential optical absorption spectroscopy （DOAS）-like algorithm is developed to retrieve the column-averaged dry- air mole fraction of carbon dioxide from ground-based hyper-spectral measurements of the direct solar beam. Different to the spectral fitting method, which minimizes the difference between the observed and simulated spectra, the ratios of multiple channel-pairs--one weak and one strong absorption channel--are used to retrieve Xc02 from measurements of the shortwave infrared （SWIR） band. Based on sensitivity tests, a super channel-pair is carefully selected to reduce the effects of solar lines, water vapor, air temperature, pressure, instrument noise, and frequency shift on retrieval errors. The new algorithm reduces computational cost and the retrievals are le^s sensitive to temperature and H20 uncertainty than the spectral fitting method. Multi-day Total Carbon Column Observing Network （TCCON） measurements under clear-sky conditions at two sites （Tsukuba and Bremen） are used to derive Xc02 for the algorithm evaluation and validation. The DOAS-like results agree very well with those of the TCCON algorithm after correction of an airmass-dependent bias.

关键词： CO2 Retrieval ground-based measurement hyper-spectrum shortwave infrared band

The characterization of protein lactylation in relation to cardiac metabolic reprogramming in neonatal mouse hearts

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Journal of Genetics and Genomics 2024年第7期51卷 735-748页

作者： Tongyu Zhang Yingxi Zhu Xiaochen Wang Danyang Chong Haiquan Wang Dandan Bu Mengfei Zhao Lei Fang Chaojun Li Ministry of education Key Laboratory of Model Animals for Disease Study Model Animal Research CenterMedical School of Nanjing UniversityNational Resource Center for Mutant MiceNanjingJiangsu 210093China State Key Laboratory of Reproductive Medicine and Offspring Health China International Joint Research Center on Environment and Human HealthCenter for Global HealthSchool of Public HealthGusu SchoolNanjing Medical UniversityNanjingJiangsu 211166China

In mammals,the neonatal heart can regenerate upon injury within a short time after birth,while adults lose this *** reprogramming has been demonstrated to be critical for cardiomyocyte proliferation in the neonatal ***,we reveal that cardiac metabolic reprogramming could be regulated by altering global protein *** performing 4D label-free proteomics and lysine lactylation(Kla)omics analyses in mouse hearts at postnatal days 1,5,and 7,2297 Kla sites from 980 proteins are identified,among which 1262 Kla sites from 409 proteins are *** clustering analysis reveals that the proteins with altered Kla sites are mainly involved in metabolic *** expression and Kla levels of proteins in glycolysis show a positive correlation while a negative correlation in fatty acid ***,we verify the Kla levels of several differentially modified proteins,including ACAT1,ACADL,ACADVL,PFKM,PKM,and ***,our study reports a comprehensive Kla map in the neonatal mouse heart,which will help to understand the regulatory network of metabolic reprogramming and cardiac regeneration.

关键词： Lactylation Metabolicrep rogramming Postnatal heart regeneration Cell proliferation