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| 1 | Correlation of burial organic carbon and paleoproductivity in the Mesoproterozoic Hongshuizhuang Formation, northern North China显示文摘In general, total organic carbon (TOC) is directly used as a proxy for paleoproductivity, however, it is not only affected by paleoproductivity, but also controlled by redox conditions and terrigenous detrital matter influx. Major and trace elements were analysed with the purpose of investigating the redox potential and paleoproductivity during deposition of the Hongshuizhuang Formation. In the present study, C-S relationship, V/Cr ratio and Mo concentration indicate that the dolomites were deposited in oxic environments, however, most of the black shales were accumulated in euxinic environments. P/Ti values in the Hongshuizhuang samples can be compared with those in the Japanese Ubara Permian-Triassic section which were regarded to be deposited under a moderate to high paleoproductivity. Ba/Al values are slightly lower than that of the laminated sediments from the continental margins of Central California (CCAL) which were thought to be accumulated under a high paleoproductivity. These results indicate that the paleoproductivity was moderate to high during deposition of the Hongshuizhuang Formation. Burial organic carbon shows positive correlations with V/Cr and Mo, but shows only weakly or no correlation with P/Ti and Ba/Al, respectively, suggesting that although the paleoproductivity was moderate to high during deposition of the Hongshuizhuang Formation, its organic-rich sediments were predominantly controlled by redox conditions and had no direct relationship with paleoproductivity. | LUO QingYong ZHONG NingNing ZHU Lei WANG YanNian QIN Jing QI Lin ZHANG Yi MA Yong | 2013 | Chinese Science Bulletin2013，58，11： | 17 |
| 2 | Immunocytochemical Study of Cells in the Vitreous of Proliferative Vitreoretretinopathy显示文摘Purpose: To identify the cellular components of vitreous samples obtained during vit-rectomy for proliferative vitreoretinopathy(PVR).Methods: With the use of three intermediate filament (IF) proteins, vimentin, glialfibrillary acidic protein (GFAP), and cytokeratin (CK), cytocentrifuge slides of 14fresh vitreous aspirates were detected with immunohistochemical technique.Results: All the specimens contained epithelial-like proliferative cells with or withoutpigment and some membrane-like pieces. Immunocytochemical staining showed that76.0-90.0% cells stained for CK, 17.4-29.6% cells expressed GFAP, and 80.1-91.0% cells were positive for vimentin.Conclusions : Majority of cells in the vitreous samples originated from retinal pigmentepithelial cells (RPE) and glial cells in PVR. Expression of IF proteins may be determinedby tissue of origin and local microenvironment. Eye Science 1999 ; 15; 13 - 16. | Bing Liu, Yannian Hui, Jixian Ma, Haiyang DuDepartment of Ophthalmology, Xijing Hospital, The Fourth Military Medical University, Xian 710032 , China | 1999 | 眼科学报1999，15，1： | 7 |
| 3 | DISTRIBUTED OPTICAL FIBER SENSOR FOR LONG-DISTANCE OIL PIPELINE HEALTH显示文摘为监视 long-distanceoil 管道健康的一个充分分布式的光纤维传感器(DOFS ) 基于光时间领域反射计(OTDR ) 被建议。一个聪明、敏感的光纤维电报沿着充当一个传感器的管道被安装。当暴露了到油并且在纤维内导致了另外的弯曲损失时,电报胀大的实验表演,和用有期刊坚硬的瘦皮肤涂的纤维的光变细对油漏引起的变丑和颤动敏感,捣弄,或机械影响。另外的变细发生了的 Theregion 被 DOFS 基于 OTDR 检测并且定位,管道事故的类型根据一光力量米收到的播送光力量的特征被识别。DOFS 的另一个原型基于一向前调制 travelingfrequency 连续波浪(FMCW ) 也被建议监视管道。DOFS 的优点和劣势基于 OTDR 和 FMCW 被讨论。实验证明 DOFS 能够经常与估计的精确在实时检测并且定位远油管道漏和损坏在十公里上的米。 | WANG Yannian JIANG Zhuangde CHEN Xiaonan ZHAO Yulong | 2006 | Chinese Journal of Mechanical Engineering2006，19，1： | 3 |
| 4 | Thermodynamic Behavior Research Analysis of Twin-roll Casting Lead Alloy Strip Process显示文摘The thermodynamic behavior of twin-roll casting(TRC) lead alloy strip process directly affects the forming of the lead strip, the quality of the lead strip and the production efficiency. However, there is little research on the thermodynamics of lead alloy strip at home and abroad. The TRC lead process is studied in four parameters: the pouring temperature of molten lead,the depth of molten pool, the roll casting speed, and the rolling thickness of continuous casting. Firstly, the thermodynamic model for TRC lead process is built.Secondly, the thermodynamic behavior of the TRC process is simulated with the use of Fluent. Through the thermodynamics research and analysis, the process parameters of cast rolling lead strip can be obtained: the pouring temperature of molten lead: 360–400 °C, the depth of molten pool: 250–300 mm, the roll casting speed: 2.5–3 m/min, the rolling thickness: 8–9 mm.Based on the above process parameters, the optimal parameters(the pouring temperature of molten lead:375–390 °C, the depth of molten pool: 285–300 mm, the roll casting speed: 2.75–3 m/min, the rolling thickness:8.5–9 mm) can be gained with the use of the orthogonal experiment. Finally, the engineering test of TRC lead alloy strip is carried out and the test proves the thermodynamic model is scientific, necessary and correct. In this paper, a detailed study on the thermodynamic behavior of lead alloy strip is carried out and the process parameters of lead strip forming are obtained through the research, which provide an effective theoretical guide for TRC lead alloy strip process. | Chengcan JIANG Yannian RUI | 2017 | Chinese Journal of Mechanical Engineering2017，30，2： | 2 |
| 5 | Method of adaptive PLL bandwidth adjustment without phase slipping显示文摘In a system based on the phase lock loop(PLL), a trade-off must be made between the tracking precision and the dynamic performance if constant parameters are adopted. To overcome this drawback, a new method called no phase slipping adaptive bandwidth(NPS-AB) is proposed, which can adjust the loop bandwidth adaptively for different working conditions. As a result, both the tracking precision and the dynamic performance can be achieved concurrently. NPS-AB has two features to keep the loop stable: one is the capability of quick response to dynamics; the other is a series of additional constraints when the bandwidth is switched. Compared with other methods, there is no phase slipping during the adjustment process for NPS-AB. The phase integer ambiguity can be avoided and the phase value is kept valid. It is meaningful for carrier ranging systems. Simulation results show that NPS-AB can deal with sudden dynamics and keep the pseudo-range value stable in the entire dynamic process. | Yannian Lou Chaojie Zhang Xiaojun Jin Zhonghe Jin | 2014 | Journal of Systems Engineering and Electronics2014，25，6： | 2 |
| 6 | Expression of CD18 on the neutrophils of patients with diabetic retinopathy显示文摘 | Huping Song Lili Wang Yannian Hui | 2007 | Graefe’s Archive for Clinical and Experimental Ophthalmology2007，，1： | 1 |
| 7 | Studies on Antioxidant Activity and Chemical Constituents of Artemisia halodendron 显示文摘 | Yannian Wang Jun Yin Yanjiang Qiao | 2007 | J of Asian traditional Medicines2007，2，1： | 1 |
| 8 | Microphysical Properties of Convective Clouds in Summer over the Tibetan Plateau from SNPP/VIIRS Satellite Data显示文摘The Tibetan Plateau (TP) plays an important role in formation and development of the East Asian atmospheric circulation, climate variability, and disastrous weathers in China. Among the many topics on TP meteorology, it is critical to understand the microphysical characteristics of clouds over the TP;however, observations of the cloud microphysics in this area are insufficient mainly due to sparse stations and limited cloud physical data. The Visible Infrared Imaging Radiometer Suite (VⅡRS), onboard the Suomi National Polar-orbiting Partnership (SNPP) satellite, has an improved imaging spectroradiometer with 17 channels of 750-m moderate resolution and 5 channels of 375-m image resolution. The high-resolution instrument has an advantage for observing the small or initial convective clouds. Based on the methodologies that we proposed before for retrieving cloud microphysical properties from SNPP, an automated mapping software package named Automatic Mapping of Convective Clouds (AMCC) has been developed at the scale of satellite swath. The properties of convective clouds are retrieved by AMCC and their values are averaged over 0.33°×0.33° grids based on the SNPP/VⅡRS satellite data over the TP during the summers of 2013-17. The results show that:(1) the temperature of lifting condensation level (TLCL) at Naqu meteorological station and the cloud base temperature (Tb) retrieved from VⅡRS are linearly correlated, with a correlation coefficient of 0.87 and standard deviation (STD) of 3.0℃;(2) convective clouds over the TP have the following macro-and microphysical properties. First, the cloud base temperature (Tb) is about -5℃, the cloud base height above the ground (Hb) ranges between 1800 and 2200 m, and the cloud water content is low. Second, the cloud condensation nuclei concentration (NCCN) is between 200 and 400 mg-1 with 0.7% in maximum supersaturation (Smax);consequently, the condensation growth of water cloud droplet with less NCCN and higher Smax is fast. Third, because the precipitation initiation depth (D14) varies within 1500-2000 m and 500-1000 m at the Yarlung Zangbo River basin and southern Tibet, respectively, the clouds over these areas are more prone to precipitation. Fourth, mean height of the cloud top above sea level (Htop) is between 10 and 13 km, but the cloud depth (Dcld) is rather small, which is about 5000 m in southern TP and gradually reduces to 2500 m in northern TP. Fifth, the glaciation temperature (Tg) ranges from -30℃ in central and southern TP to -25℃ in northern TP, which, combined with the warmer Tg and the Tb less than 0℃, leads to the domination of ice process in the clouds;(3) the macro-and microphysical properties of convective clouds over the TP explain why rainfall there is frequent and lasts over a short time with small amount and large rain drops. | Zhiguo YUE Xing YU Guihua LIU Jin DAI Yannian ZHU Xiaohong XU Ying HUI Chuang CHEN | 2019 | Journal of Meteorological Research2019，33，3： | 1 |
| 9 | Expression of CD18 on the neutrophils of patients with diabetic retinopathy显示文摘 | Huping Song Lili Wang Yannian Hui | 2007 | Graefe’s Archive for Clinical and Experimental Ophthalmology2007，，1： | 1 |
| 10 | Swing-up con- trol based on virtual composite links for n-link underaetuated robot with passive first joint 显示文摘 | Xin Xin Jin-Hua She Taiga Yamasaki Yannian Liu | 2009 | Automatiea2009，45，3： | 1 |
| 11 | Experimental study on the fracture toughness of Q460C the high - strength construction steel at low temperature 显示文摘 | Wang Yuanqing Lin Yun Zhang Yannian Shi Yongjiu and Chen Hang | 2011 | Applied Mechanics and Materials2011，7178，： | 1 |
| 12 | The Microphysical Characteristics of Wintertime Cold Clouds in North China显示文摘The microphysical characteristics of wintertime cold clouds in North China were investigated from 22 aircraft observation flights from 2014 to 2017,2020,and 2021.The clouds were generated by mesoscale weather systems with little orographic component.Over the mixed-phase temperature range(–40℃to 0℃),the average fraction of liquid,mixedphase,and ice cloud was 4.9%,23.3%,and 71.8%,respectively,and the probability distribution of ice mass fraction was a half-U-shape,suggesting that ice cloud was the primary cloud type.The wintertime mixed-phase clouds in North China were characterized by large cloud droplet number concentration,small liquid water content(LWC),and small effective diameter of cloud droplets.The main reason for larger cloud droplet number concentration and smaller effective diameter of cloud droplets was the heavy pollution in winter in North China,while for smaller LWC was the lower temperature during flights and the difference in air mass type.With the temperature increasing,cloud droplet number concentration,LWC,and the size of ice particles increased,but ice number concentration and effective diameter of cloud droplets decreased,similar to other mid-latitude regions,indicating the similarity in the temperature dependence of cloud properties of mixed-phase clouds.The variation of the cloud properties and ice habit at different temperatures indicated the operation of the aggregation and riming processes,which were commonly present in the wintertime mixed-phase clouds.This study fills a gap in the aircraft observation of wintertime cold clouds in North China. | Xuexu WU Minghuai WANG Delong ZHAO Daniel ROSENFELD Yannian ZHU Yuanmou DU Wei ZHOU Ping TIAN Jiujiang SHENG Fei WANG Deping DING | 2022 | Advances in Atmospheric Sciences2022，39，12： | 1 |
| 13 | Restraining DC magnetic bias in PS-PWM full bridge inverter of plasma power显示文摘 | J1ANG XIAOMEI RUI YANNIAN CHEN GUOQIANG | 2010 | Intelligent System Design and Engineering Application2010，2010，2： | 1 |
| 14 | Mechanism of Spine Motion About Contact Time in Quadruped Running显示文摘The current research of quadruped robot focuses on the quadruped robot with spine motion. Contact time is a very important part of system performance. However, the mechanism of spine motion about contact time has not been clearly elucidated. In this paper, the e ect of spine motion on contact time is studied deeply from dynamic view.Firstly, a simplified model of the quadruped robot with spine joint is set up, its dynamic equations are derivated, and a method that can generate passive periodic locomotion is proposed. Secondly, according to the vertical spring oscillator model, the two-dimension planar locomotion of the simplified model is regarded as a special vibration in the vertical direction, and the approximate formula of calculating contact time is obtained. Finally, the approximate formula of calculating contact time is verified by the simulation results of passive periodic locomotion, and the e ect of spine motion on contact time is deeply discussed based on the approximate formula of calculating contact time. The discussion proves that spine motion indeed has little e ect on contact time, but spine motion can slightly reduce body pith movement and regulate the leg sti ness in leg contact phase. This research proposes an e ective research method which can be used to study the motion mechanism of the quadruped robot with spine motion,and the mechanism of spine motion about contact time is clearly elucidated which is helpful to set the parameters of mechanical structure and study control algorithm about the quadruped robot with spine motion. | Qi Liu Yannian Bao Wei Yu Jianming Zhang Chao Li Xinru Xie | 2019 | Chinese Journal of Mechanical Engineering2019，32，2： | 0 |
| 15 | Inhibition of Retinal Microvascular Endothelial Cells Migration and Tube Formation by Pericytes through Down-regulating Flk-1 mRNA显示文摘 | Yingli Wang Yannian Hui Bin Guo Xu Hou Jixian Ma | 2006 | Journal of US-China Medical Science2006，3，3： | 0 |
| 16 | Reversibly immortalized keratinocytes(iKera)facilitate re-epithelization and skin wound healing:Potential applications in cell-based skin tissue engineering显示文摘Skin injury is repaired through a multi-phase wound healing process of tissue granulation and re-epithelialization.Any failure in the healing process may lead to chronic non-healing wounds or abnormal scar formation.Although significant progress has been made in developing novel scaffolds and/or cell-based therapeutic strategies to promote wound healing,effective management of large chronic skin wounds remains a clinical challenge.Keratinocytes are critical to re-epithelialization and wound healing.Here,we investigated whether exogenous keratinocytes,in combination with a citrate-based scaffold,enhanced skin wound healing.We first established reversibly immortalized mouse keratinocytes(iKera),and confirmed that the iKera cells expressed keratinocyte markers,and were responsive to UVB treatment,and were non-tumorigenic.In a proof-of-principle experiment,we demonstrated that iKera cells embedded in citrate-based scaffold PPCN provided more effective re-epithelialization and cutaneous wound healing than that of either PPCN or iKera cells alone,in a mouse skin wound model.Thus,these results demonstrate that iKera cells may serve as a valuable skin epithelial source when,combining with appropriate biocompatible scaffolds,to investigate cutaneous wound healing and skin regeneration. | Jiamin Zhong Hao Wang Ke Yang Huifeng Wang Chongwen Duan Na Ni Liqin An Yetao Luo Piao Zhao Yannian Gou Shiyan Sheng Deyao Shi Connie Chen William Wagstaff b Bryce Hendren-Santiago b Rex C.Haydon b Hue H.Luu b Russell R.Reid Sherwin HHo Guillermo A.Ameer Le Shen Tong-Chuan He Jiaming Fan | 2022 | Bioactive Materials2022，7，3： | 0 |
| 17 | EFFECT OF DROUGHT ON AGRICULTURE AND ITS COUNTERMEASURES | Chen Yannian(Meteorological Institute of Agriculture,Chinese Academy of Agriculture,Beijing 100081) | 1995 | Natural Disaster Reduction in China1995，，2： | 0 |
| 18 | Al-50 wt%Si Alloy by Spark Plasma Sintering(SPS)for Electronic Packaging Materials显示文摘A hypereutectic Al-50 wt%Si alloy for electronic packaging was prepared by spark plasma sintering(SPS)technology using gas-atomized Al-50 wt%Si powder.The effect of sintering parameters on alloy phase composition,microstructure,thermal performance and the tensile strength at different temperatures was investigated.The experimental results show that the alloy can obey the diffraction peaks of silicon and aluminum without other peaks appearing.The primary silicon in the prepared alloy can be evenly distributed in the aluminum matrix.The coefficient of thermal expansion(CTE)and thermal conductivity(TC)of the alloy will improve with the increase of sintering temperature,but they will decrease after sintering for a long time,which is caused by the large difference of coefficient of thermal expansion between silicon and aluminum.The tensile properties of the alloy at room temperature will increase with the increase of sintering temperature,but higher test temperatures will inhibit the tensile properties except the elongation.The morphology and fracture mode of the tensile fracture are also analyzed to determine the good bonding strength of the alloy. | 高冲 牛立斌 MA Jun AN Yujiao HU Yuyang YANG Lei CHEN Guofang WANG Yannian | 2022 | Journal of Wuhan University of Technology(Materials Science)2022，37，3： | 0 |
| 19 | SV40 large T antigen-induced immortalization reprograms mouse cardiomyocyte progenitors with mesenchymal stem cell characteristics and osteogenic potential显示文摘While progenitor cell-based cardiomyocyte regeneration holds great promise of repairing an injured heart,primary cardiomyogenic progenitors(CPs)have a limited life span in culture,hampering the use of CPs for in vitro and in vivo studies.We previously isolated primary CPs from mouse E15.5 fetal heart,and reversibly immortalized them with SV40 large T antigen(SV40 LTA),resulting in immortalized CPs(iCPs),which maintain long-term proliferation and ex-press cardiomyogenic markers and retain differentiation potential under appropriate differentiation conditions. | Yichun Yu Jiamin Zhong Connie Chen Yannian Gou Guozhi Zhao Piao Zhao Yonghui Wang Wei Zeng Annie Wang William D.Wagstaff Jr Rex C.Haydon Tong-Chuan He Russell R.Reid Michael J.Lee Hue H.Luu Jiaming Fan | 2023 | Genes & Diseases2023，10，4： | 0 |
| 20 | Folk Arts Breathes New Life显示文摘The 2nd China National Puppet and Shadow Play competition was held in guangzhou in September 2003. Some one thousand performers from 29 troupes across the country including those from Taiwan and Hong Kong attended this grand event jointly hosted by the Ministry of Culture and Guangzhou Muniipal Government. | Text and Photo by Li Yannian | 2004 | China & The World Cultural Exchange2004，70，1： | 0 |
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