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| 1 | Progresses on microwave remote sensing of land surface parameters显示文摘Highly accurate observations at various scales on the land surface are urgently needed for the studies of many areas,such as hydrology,meteorology,and agriculture.With the rapid development of remote sensing techniques,remote sensing has had the capacity of monitoring many factors of the Earth's land surface.Especially,the space-borne microwave remote sensing systems have been widely used in the quantitative monitoring of global snow,soil moisture,and vegetation parameters with their all-weather,all-time observation capabilities and their sensitivities to the characteristics of land surface factors.Based on the electromagnetic theories and microwave radiative transfer equations,researchers have achieved great successes in the microwave remote sensing studies for different sensors in recent years.This article has systematically reviewed the progresses on five research areas including microwave theoretical modeling,microwave inversion on soil moisture,snow,vegetation and land surface temperatures.Through the further enrichment of remote sensing datasets and the development of remote sensing theories and inversion techniques,remote sensing including microwave remote sensing will play a more important role in the studies and applications of the Earth systems. | SHI JianCheng DU Yang DU JinYang JIANG LingMei CHAI LinNa MAO KeBiao XU Peng NI WenJian XIONG Chuan LIU Qiang LIU ChenZhou GUO Peng CUI Qian LI YunQing CHEN Jing WANG AnQi LUO HeJia WANG YinHui | 2012 | Science China Earth Sciences2012，55，7： | 24 |
| 2 | Mechanical wear debris feature,detection,and diagnosis:A review显示文摘Mechanical debris is an important product of friction wear, which is also a crucial approach to know the running status of a machine. Many studies have been conducted on mechanical debris in related fields such as tribology, instrument, and diagnosis. This paper presents a comprehensive review of these studies, which summarizes wear mechanisms(e.g., abrasive wear, fatigue wear, and adhesive wear) and debris features(e.g., concentration(number), size, morphology, and composition), analyzes detection methods principles(e.g., offline: spectrograph and ferrograph, and online: optical method, inductive method, resistive-capacitive method, and acoustic method),reviews developments of online inductive methods, and investigates the progress of debris-based diagnosis. Finally, several notable problems are discussed for further studies. | Wei HONG Wenjian CAI Shaoping WANG Mileta M.TOMOVIC | 2018 | Chinese Journal of Aeronautics2018，31，5： | 19 |
| 3 | Comparison of simple discectomy and instrumented posterior lumbar interbody fusion for treatment of lumbar disc herniation combined with Modic endplate changes显示文摘 | Cao Peng Chen Zhe Zheng Yuehuan Wang Yuren Jiang Leisheng Yang Yaoqi Zhuang Chengyu Liang Yu Zheng Tao Gong Yaocheng Zhang Xingkai Wu Wenjian Qiu Shijing | 2014 | Chinese Medical Journal2014，，15： | 15 |
| 4 | Zscan4 promotes genomic stability during reprogramming and dramatically improves the quality of iPS cells as demonstrated by tetraploid complementation显示文摘用 Yamanaka 因素产生的导致的 pluripotent 茎(iPS ) 细胞在自体同源的细胞治疗为使用有大潜力。然而, genomic 畸形充分在人的 iPS 房间,和房间不是的大多数老鼠 iPS 存在 pluripotent 由 tetraploid 互补试金评估了 TCA ) ;这很可能与 DNA 损坏反应(DDR ) 被联系在 Yamanaka 因素导致的早 reprogramming 发生了。相反,原子转移忠实地装改编体的房间进胚胎的茎(ES ) 满足 TCA 的房间。我们因此假设了涉及导致卵母细胞的 reprogramming 的因素可以在 reprogramming 期间稳定体的染色体,并且改进结果的 iPS 房间的质量。测试这个假设,我们在 iPS 期间为能减少的因素屏蔽了 DDR 信号房间正式就职。我们决定了那 Zscan4,在有 Yamanaka 因素的联合,不是仅仅显著地减少了 DDR 而且显著地支持了 iPS 房间产生的效率。Zscan4 的包括稳定了 genomic DNA,导致 p53 downregulation。而且, Zscan4 也提高了象通过 telomere 感染以后的 3 天一样早变长的 telomere 基于再结合的机制。作为结果,与 Zscan4 的增加产生的 iPS 房间比古典 iPS 房间展出了更长的 telomeres。惊人地,超过 50% iPS 房间线(11/19 ) 经由这生产了 “ Zscan4 protocol”产生了由 TCA 决定了的实时熊的 all-iPS 房间老鼠,与为用古典 Yamanaka 因素生产的线的 1/12 相比。我们的调查结果提供在 reprogramming 期间维持 genomic 稳定性支持的第一示范高质量的 iPS 房间的产生。 | Jing Jiang Wenjian Lv Xiaoying Ye Lingbo Wang Man Zhang Hui Yang Maja Okuka Chikai Zhou Xuan Zhang Lin Liu Jinsong Li | 2013 | Cell Research2013，23，1： | 14 |
| 5 | 暖通空调系统优化控制与能量管理的现状及发展趋势显示文摘分析了暖通空调优化能量消耗的特点,介绍了暖通空调控制系统基础控制器参数整定、工作点优化和能量管理的现状。根据暖通空调系统的未来需求和相关技术的发展,提出了其控制技术的发展方向。 | 李树江 秦军 刘畅 张晓青 Wenjian Cai | 2007 | 暖通空调2007，37，4： | 14 |
| 6 | Variations of oceanic fronts and their influence on the fishing grounds of Ommastrephes bartramii in the Northwest Pacific显示文摘Two predominant currents, the warm Kuroshio Current and the cold Oyashio Current, meet in the Northwest Pacific Ocean. The dynamics of physical oceanographic structures in this region, including frontal zones and meandering eddies, result in a highly productive habitat that serves as a favorable feeding ground for various commercially important species. Neon flying squid, Ommastrephes bartramii, is an important oceanic squid, which is widely distributed in the North Pacific Ocean. Based on the catch data collected by Chinese squid jigging fleets and relevant environmental data, including sea surface temperature(SST) and fronts(represented by gradients of SST and thermocline) during 1998–2009, the variations of oceanic fronts and their influence on the fishing grounds of O. bartramii were evaluated, and the differences in distribution of fishing grounds of O. bartramii in 2000 and 2002 were compared by describing the differences in vertical temperature between 0–300 m. It was found that the preferred horizontal temperature gradient of SST for O. bartramii tended to be centered at 0.01–0.02°C/nm, which attracted nearly 80% of the total fishing effort, and the preferred horizontal temperature gradients at the 50 m and 105 m layers were mainly located at 0.01–0.03°C/nm, which accounted for more than 70% of the total fishing effort during August–October. The preferred vertical temperature gradient within the 0–50 m layer for O. bartramii tended to be centered at 0.15–0.25°C/m during August and September and at 0.10–0.15°C/m in October, implying that the mixed surface layer was distributed at depths of 0–50 m. It was concluded that the vertical temperature gradient was more important than the horizontal temperature gradient in playing a role in forming the fishing ground. The results improved our understanding of the spatial dynamics of the O. bartramii fishery. | CHEN Xinjun TIAN Siquan GUAN Wenjian | 2014 | Acta Oceanologica Sinica2014，33，4： | 12 |
| 7 | A critical review on the health promoting effects of mushrooms nutraceuticals显示文摘Extensive elucidations focusing on the efficient health promoting properties and high nutritional values of mushrooms have been expanded dynamically from the past few decades.Due to its high quality of proteins,polysaccharides,unsaturated fatty acids,mineral substances,triterpenes sterols and secondary metabolites,mushrooms have always been appreciated for their vital role in protecting and curing various health problems,such as immunodeficiency,cancer,inflammation,hypertension,hyperlipidemia,hypercholesterolemia and obesity.Moreover,investigations in recent years have revealed the correlations between the health-promoting benefits and gut microbiota regulating effects induced by the mushrooms intake.Researches on the immense role in the nutritional and health benefits displayed by mushrooms have become an emergent task to study.The present article overviewed and compiled the latest information correlated to the health benefits and underlying functional mechanisms of mushroom nutraceuticals,and concluded that the supplementation of mushrooms as a dietary composition could become a natural adjuvant for the prevention and treatment of several health diseases. | Gaoxing Ma Wenjian Yang Liyan Zhao Fei Pei Donglu Fang Qiuhui Hu | 2018 | Food Science and Human Wellness2018，7，2： | 10 |
| 8 | Recognition of climatic effects of land use/land cover change under global warming显示文摘Greenhouse gas emissions and land use/land cover change(LUCC)are two human activities notably affecting climate change.Will temperature and precipitation increase significantly during global warming resulting in more pronounced LUCC climatic effects?Considering the interannual forcing of these two factors,the NCAR Community Atmosphere Model(CAM4.0)was used in this study to investigate the importance of climatological background to LUCC impacts.Experiments based on the difference in the background climate,the greenhouse gas concentrations in 1850 and in the present age indicate contrary changes in climate sensitivity through estimations of the radiative forcing associated with LUCC,which are 0.54°C/(W/m2)and 0.26°C/(W/m2),respectively.Therefore,the background climate appears to play an important role in the regional impact of LUCC,especially at higher latitudes.In addition,global warming predominantly influences snow-albedo feedback in the mid-latitudes,thus determining the impact of LUCC,whereas the regional difference in precipitation caused by global warming is responsible for the differing climate response to LUCC in the tropics and subtropics. | HUA WenJian CHEN HaiShan | 2013 | Chinese Science Bulletin2013，58，31： | 10 |
| 9 | Chaotic laser synchronization and its application in optical fiber secure communication显示文摘In this paper, optical fiber chaotic secure communication is proposed by coupling chaotic laser synchronous system with optical fiber propagation channel. Feedback synchronous system of chaotic semiconductor lasers is presented and synchronous error and decoding formulae are demonstrated. Synchronization between two chaotic laser systems with distributed feedback semiconductor lasers at wavelength of 1.31 μm is simulatively achieved with almost zero synchronous error. Parameter mismatch, synchronous transient response and noise effect on the system are studied. Robustness of synchronization and anti-perturbation can increase by increasing the feedback coefficient of the system. Influence of group-velocity-dispersion and self-phase modulation of optical fiber on chaotic laser signal and synchronization are analyzed, and it is found that group-velocity-dispersion affects pulse shape, synchronization and decodin gand limits optical fiber propagation distances, and self-phase modulation does not affect pulse shape, while its product of nonlinear phase shift can affect synchronization and decoding, and restrict propagation distances of optical fiber chaotic communication system and hence the maximum optical power formula is educed. Injecting parameter modulation and amplitude modulation are numerically simulated in long-haul optical fiber secure communication systems. | YAN Senlin CHI Zeying CHEN Wenjian Schoof of Electronic Engineering and Photoelectronic Technology, Nanjing University of Science and Technology, Nanjing 210094, China | 2004 | Science in China(Series F)2004，47，3： | 10 |
| 10 | Carbon and oxygen isotopes analyses for the Sinian carbonates in the Helan Mountain, North China显示文摘We conducted detailed studies of the Sinian carbonates from the Helan Mountain,Ningxia by both field investigation and laboratory analyses of carbon and oxygen isotopes.The carbon isotopic compositions of the Sinian Zhengmuguan Formation shows variations with regularity in the five studied sections,theδ13C values all gradually decrease from bottom to top,with a total range from 4.51‰to 0.11‰,and the biggest negative excursion reaches up to 6.88‰.In addition,abundant macro-body fossils were also found from the Tuerkeng Formation in this study,similar to those found from the Dengying Formation in the South China Block.This observation firmly constrained the age for the Zhengmuguan and Tuerkeng formations to the Sinian period.Here we interpreted that the Zhengmuguan Formation formed during a glacial period when the extremely cold climate substantially decreased the amount of burial of organic matter in the ocean and thus led to the general negativeδ13C excursion.The increasingδ13C values in the Tuerkeng Formation dolomites imply the ending of the glacial period in the Zhengmuguan epoch,biological recovery and increase of organic matter burial in the ocean occurred during this period.Comparing our obtained carbon and oxygen isotopes of the Zhengmuguan and Tuerkeng formations with those of coeval carbonate successions from other places all over the world,the Zhengmuguang-aged glacial deposits might be deposited after the Gaskiers glaciation.This study provides important information for paleo-ocean,paleogeographic and biological evolution in the North China Block during the Ediacaran period and adds new carbon and oxygen isotopes data for the global Sinian carbon-oxygen isotopes dataset. | YANG Jie ZENG ZuoXun CAI XiongFei LI ZhiYong LI TianBin MENG Fang HE WenJian | 2013 | Chinese Science Bulletin2013，58，32： | 8 |
| 11 | Effects of Jisuikang on hemorheology and inflammatory factors in rats following spinal cord injury显示文摘BACKGROUND:Trauma can damage the spinal cord or cauda equina to different degrees. Previous studies have verified that traditional Chinese medicine has effects on spinal cord injury via a variety of pathways. OBJECTIVE:To observe changes in hemorheology and inflammatory factors in spinal cord injury rats following treatment with the Chinese medicine Jisuikang,to verify the dose-dependent effect of Jisuikang,and to compare its effects with the effects of prednisone. DESIGN,TIME AND SETTING: A randomized study was performed at the Research Institute of Orthopedics,and Experimental Center of First Clinical Medical College,Nanjing University of Traditional Chinese Medicine,China from September 2007 to March 2008. MATERIALS: Jisuikang powdered extract,composed of milkvetch root (30g),Chinese angelica (12g),red peony root (12g),earthworm (10g),szechwan lovage rhizome (10g),peach seed (10g) and safflower (10g),was provided by the Experimental Center,First Clinical Medical College,Nanjing University of Traditional Chinese medicine. Each gram of powdered extract was equivalent to 6.47 g crude drug. METHODS: A total of 72 Sprague Dawley rats were randomly assigned into 6 groups (n = 12). Rat models of spinal cord injury were established using the occlusion method. Rats in the model group were treated with distilled water. Rats in the 25 g/kg,12.5 g/kg,and 6.25 g/kg Jisuikang groups were given 25 g/kg,12.5 g/kg,or 6.25 g/kg Jisuikang by gavage,for 14 days. Rats in the prednisone group received 0.06 g/kg prednisone by gavage,for 7 days. Rats in the normal group were given the same volume of distilled water. The volume of administration was 15 mL/kg. MAIN OUTCOME MEASURES: Rat serum interleukin-10,tumor necrosis factor-α (TNF-α),nitric oxide,nitric oxide synthase levels,malondialdehyde content,superoxide dismutase activity and whole blood viscosity were measured in each group. Spinal cord around the site of the model was collected. Half the spinal cord was used for histopathologic examination. The other half was used for measurement of nitric oxide and NOS levels,malondialdehyde contents,and superoxide dismutase activity. RESULTS: Superoxide dismutase activity was higher in the 25 g/kg Jisuikang group than in the model group. Malondialdehyde contents,nitric oxide and NOS levels were lower in the 25 g/kg and 12.5 g/kg Jisuikang groups compared with the model group. Whole blood viscosity was lower in the 25 g/kg and 12.5 g/kg Jisuikang groups compared with the model group (P < 0.05-0.01). Serum TNF-αcontent was lower in each Jisuikang group compared with the model group (P < 0.05-0.01). Serum interleukin-10 levels were greater in the prednisone group and each Jisuikang group compared with the model group (P < 0.01). Mild hemorrhage and necrosis in the rat spinal cord,and unclear neural cell swelling were seen in the 25 g/kg Jisuikang group. Severe hemorrhage and necrosis in the rat spinal cord,and distinct neural cell swelling were seen in the 12.5 g/kg Jisuikang group. Edema in the white matter was found in the 6.25 g/kg Jisuikang group. Pathological changes in the prednisone group were identical to the 25 g/kg and 12.5 g/kg Jisuikang groups. CONCLUSION: Jisuikang inhibits nitric oxide synthase expression,reduces nitric oxide and TNF-α levels,decreases malondialdehyde content,increases interleukin-10 levels and superoxide dismutase activity,improves indices of hemorheology,and prevents secondary changes in spinal cord injury,resulting in relieving pathological changes in spinal cord tissue. The outcome was significant in the 25 g/kg Jisuikang group compared with the 12.5 g/kg Jisuikang group. | Yong Ma Jianzhong Zhou Wengui Yang Wenjian Sun Shaojian Yin Shijie Sun | 2008 | Neural Regeneration Research2008，3，11： | 8 |
| 12 | Effects of future land use change on the regional climate in China显示文摘Land use and land cover change(LUCC)is one of the important human forcing on climate.However,it is difficult to infer how LUCC will affect climate in the future from the effects of previous LUCC on regional climates in the past.Thus,based on the land cover data recommended by the Coupled Model Intercomparison Project Phase 5(CMIP5),a regional climate model(Reg CM4)was used to investigate the climate effects of future land use change over China.Two 15-year simulations(2036–2050),one with the current land use data and the other with future land cover scenario(2050)were conducted.It is noted that future LUCC in China is mainly characterized by the transition from the grassland to the forest.Results suggest that the magnitudes and ranges of the changes in temperature and precipitation caused by future LUCC show evident seasonality,which are more prominent in summer and autumn.Significant response of climate to future LUCC mainly happens in Northeast China,North China,the Hetao Area,Eastern Qinghai-Tibetan Plateau and South China.Further investigation shows that future LUCC can also produce significant impacts on the atmospheric circulation.LUCC results in abnormal southwesterly wind over extensive areas from the Indian peninsula to the coasts of the South China Sea and South China through the Bay of Bengal.Furthermore,Indian tropical southwest monsoons and South Sea southwest monsoons will both be strong,and the abnormal water vapor convergence from the South China Sea and the Indian Ocean will result in more precipitation in South China. | HUA WenJian CHEN HaiShan LI Xing | 2015 | Science China Earth Sciences2015，58，10： | 8 |
| 13 | Ultra-sensitive graphene strain sensor for sound signal acquisition and recognition显示文摘为健全信号获得和识别的一个便携、高精确的传感器从编织的特殊设计的 graphene 的薄电影被制作织物(GWF ) 。在被拉长之上,随机的裂缝的高密度出现在网络,它减少当前的小径,从而增加电阻。因此,这部电影能对人的喉咙作为一个紧张传感器起作用以便测量通过肌肉运动,一个声音是否被生产的讲话。超离频敏感允许由提取声波的签名特征的快速、低频率的讲话采样的实现。在这研究, 26 封英语信,典型汉字和音调的代表性的信号,甚至短语和句子被测试,揭示在电阻的明显、典型的变化。而且, graphene 传感器的电阻变化与预告录下的声音完美地反应了。由把人工智能与数字信号处理相结合,我们期望以后,这个 graphene 传感器将能成功地达成复杂声学的系统和听觉的数据的大数量。 | Yan Wang Tingting Yang Junchao Lao Rujing Zhang Yangyang Zhang Miao Zhu Xiao Li Xiaobei Zang Kunlin Wang Wenjian YU Hu Jin Li Wang Hongwei Zhu | 2015 | Nano Research2015，8，5： | 8 |
| 14 | Resveratrol reduces intracellular reactive oxygen species levels by inducing autophagy through the AMPK-mTOR pathway显示文摘Oxidative stress induced by free fatty acid aggravates endothelial injury,which leads to diabeti cardiovascular complications.Reduction of intracellular oxidative stress may attenuate these pathogeni processes.The dietary polyphenol resveratrol reportedly exerts potential protective effects against endothelia injury.This study determined whether resveratrol can reduce the palmitic acid (PA)-induced generation o reactive oxygen species (ROS)and further explored the underlying molecular mechanisms.We found tha resveratrol significantly reduced the PA-induced endothelial ROS levels in human aortic endothelial cells Resveratrol also induced endothelial cell autophagy,which mediated the effect of resveratrol on ROS reduction Resveratrol stimulated autophagy via the AMP-activated protein kinase (AMPK)-mTOR pathway.Taketogether,these data suggest that resveratrol prevents PA-induced intracellular ROS by autophagy regulation via the AMPK-mTOR pathway.Thus,the induction of autophagy by resveratrol may provide a novel therapeuti candidate for cardioprotection in metabolic syndrome. | Jun Song Yeping Huang Wenjian Zheng Jing Yan Min Cheng Ruxing Zhao Li Chen Cheng Hu Weiping Jia | 2018 | Frontiers of Medicine2018，12，6： | 7 |
| 15 | Radar Target Recognition Algorithm Based on RCS Observation Sequence——Set-Valued Identification Method显示文摘This paper studies the problem of radar target recognition based on radar cross section(RCS)observation sequence.First,the authors compute the discrete wavelet transform of RCS observation sequence and extract a valid statistical feature vector containing five components.These five components represent five different features of the radar target.Second,the authors establish a set-valued model to represent the relation between the feature vector and the authenticity of the radar target.By set-valued identification method,the authors can estimate the system parameter,based on which the recognition criteria is given.In order to illustrate the efficiency of the proposed recognition method,extensive simulations are given finally assuming that the true target is a cone frustum and the RCS of the false target is normally distributed.The results show that the set-valued identification method has a higher recognition rate than the traditional fuzzy classification method and evidential reasoning method. | WANG Ting BI Wenjian ZHAO Yanlong XUE Wenchao | 2016 | Journal of Systems Science & Complexity2016，29，3： | 7 |
| 16 | Hotspots of the sensitivity of the land surface hydrological cycle to climate change显示文摘Due to the shortage of the global observational data of the terrestrial hydrological variables,the understanding of how surface hydrological processes respond to climate change is still limited.In this study,the Community Land Model(CLM4.0)with high resolution atmospheric forcing data is selected to simulate the global surface hydrological quantities during the period 1948–2006and to investigate the spatial features of these quantities in response to climate change at the regional scales.The sensitivities of evaporation and runoff with respect to the dominant climate change factors(e.g.temperature and precipitation)derived from the concept of climate elasticity are introduced.Results show that evaporation has a declining trend with a rate of 0.7 mm per decade,while runoff shows a weak increasing trend of 0.15 mm per decade over the global land surface.Analyses of the hotspots in the hydrological cycle indicate that the spatial distributions for evaporation and runoff are similar over many areas in central Asia,Australia,and southern South America,but differ largely in high latitudes.It is also found that,the evaporation hotspots in arid regions are mainly associated with the changes in precipitation.Our sensitive analysis suggests that the hydrological quantities show a rather complicated spatial dependency of response of the water cycle to the different climate factors(temperature and precipitation). | HUA WenJian CHEN HaiShan ZHU SiGuang SUN ShanLei YU Miao ZHOU LiMing | 2013 | Chinese Science Bulletin2013，58，30： | 7 |
| 17 | Experimental Study on Wear and Spalling Behaviors of Railway Wheel显示文摘The current researches of the wear and spalling behaviors of wheel/rail materials focus on the field investigation rather than the mechanism.However,it is necessary and significant for clarifying the mechanism and relationship between the wear and spalling damage of railway wheel to test and reproduce the wheel damages in laboratory.The objective of this paper is to investigate the wear and spalling damage behaviors of railway wheel using a JD-1 wheel/rail simulation facility,which consists of a small wheel serving as rolling stock wheel,and a larger wheel serving as rail.The damage process of wheel roller is explored in terms of the creep ratio,axle load,and carbon content by means of various microscopic examinations.The experimental results show that the wear volume growth of wheel roller is proved to be proportional to the increase of the creep ratio and normal load between simulating wheel and rail.The increase of carbon content of wheel material causes a linear reduction in the wear volume.The microscopic examinations indicate that the rolling wear mechanism transfers from abrasive wear to adhesive and fatigue wear with an increase of tangential friction force,which results in the initiation of fatigue crack,and then aggravates spalling damage on the wheel roller surface.The surface hardness of material depends strongly upon its carbon content.The decrease of the carbon content of wheel material may alleviate spalling damage,but can cause a significant growth in the wear volume of wheel roller.Therefore,there is a competitive relationship between the wear and spalling damage of wheel material.This research proposes an important measure for alleviating or preventing the wear and spalling damage of railway wheel material. | WANG Wenjian GUO Jun LIU Qiyue | 2013 | Chinese Journal of Mechanical Engineering2013，26，6： | 7 |
| 18 | A model for accurately calculating hyper-spectral, middle-shortwave infrared radiative transfer for remote sensing显示文摘Although the calculation of radiative transfer in the middle-shortwave infrared band is important in the field of optical remote sensing, studies in this area of research are rare in China. Both solar reflection and atmospheric emission should be considered when calculating radiative transfer in the middle-shortwave infrared band. This paper presents a new radiative transfer model based on the doubling and adding method. The new model uses approximate calculations of direct solar reflection,multiple scattering, and thermal emissions for a finitely thin atmospheric layer and considers both the solar and thermal sources of radiation. To verify its accuracy, the calculation results produced by the model for four typical scenarios(single layer at night,multi-layer aerosols, double-layer with ice and water clouds, and multi-layer with clouds and aerosols) were compared with those of the DISORT model. With the exception of a few channels, the absolute deviation between the two models was less than2×10^(-6) K. For the same calculation, the computation speed of the new model was approximately two to three times faster than that of the DISORT model. Sensitivity studies were performed to evaluate the error resulting from using simplified calculation methods in the new model. The results obtained in this study indicated that atmospheric thermal emission made a significant contribution to the measured radiance in the strong-absorption band(2230–2400 cm^(-1)), whereas solar radiation could be neglected in this region. However, neglecting solar radiation in the window region(2400–2580 cm^(-1)) introduced error on the order of dozens of K. Employing the average-layer temperature method simplified the calculation of thermal radiation but caused a larger error in the strong-absorption band than in the window region. In the doubling and adding method, the calculation error decreased as the value used for minimum optical thickness decreased. Under the condition of satisfying the requirement of calculation precision, we can consider using the layer-average temperature radiation method and selecting a relative larger minimum optical thickness value to improve the calculation efficiency. The new radiative calculation model proposed herein can be used in the simulation, inversion, and assimilation of middle-shortwave infrared measurements by hyper-spectral satellite instruments. | BAI WenGuang ZHANG Peng ZHANG WenJian MA Gang QI ChengLi | 2018 | Science China Earth Sciences2018，61，3： | 6 |
| 19 | Geochronology and geochemistry of Permo-Triassic sandstones in eastern Jilin Province(NE China): Implications for final closure of the Paleo-Asian Ocean显示文摘In the eastern part of the Central Asian Orogenic Belt(CAOB) in northeastern(NE) China, scattered outcrops of molasse deposits mark the ending of an orogeny and are crucial for understanding the evolution of the Paleo-Asian Ocean(PAO). However, the timing of tectonic events and the relationships among these strata remain controversial. To better constrain these geologic events, a comprehensive study of the detrital zircon U-Pb geochronology and geochemistry of the sandstones of the Kaishantun(KST) Formation and Kedao(KD) Group in eastern Jilin Province, NE China, was conducted. The KST Formation is traditionally considered a molasse deposit. The sandstones display low CIA, PIA and high ICV values and low Th/U and Rb/Sr ratios, which suggest that the rocks were derived from an immature intermediate-felsic igneous source and experienced a simple sedimentary recycling history with relatively weak chemical weathering. LA-ICP-MS U-Pb dating of detrital zircons from two samples of the KST Formation yields ages of 748-252 Ma, suggesting that the KST Formation was deposited between 254.5 Ma and 252 Ma in Late Permian. The zircons were mainly derived from the continental northern part of the North China Craton(NCC). In contrast, the U-Pb dating of detrital zircons from five samples of the KD Group yields ages of 2611-230 Ma, suggesting that the KD samples were deposited in the Early to Middle Triassic(ca. 248-233 Ma). The detrital zircon ages for the KD samples can be divided into groups with peaks at 2.5 Ga, 1.8 Ga, 800-1000 Ma, 500 Ma and 440-360 Ma, which suggest that the samples were derived from bidirectional provenances in the Jiamusi-Khanka Block and the NCC. These new data,combined with previously published results, suggest that at least three orogenic events occurred in central-eastern Jilin Province during the Early Permian(270-262 Ma), Early Triassic(254-248 Ma) and Middle-Late Triassic(242-227 Ma). The final closure of the PAO occurred during 242-227 Ma in the Middle-Late Triassic along the Changchun-Yanji suture zone. The detrital zircon geochronological data clearly record plate convergence and the scissor-like closure of the PAO in the eastern CAOB. | Qingxiang Du Zuozhen Han Xiaoli Shen Chao Han Zhigang Song Lihua Gao Mei Han Wenjian Zhong | 2019 | Geoscience Frontiers2019，10，2： | 6 |
| 20 | 基于制冷剂R141B的喷射器混合模型及其实验验证显示文摘建立了一个简单且有效的喷射器混合模型。首先利用热力学、流体力学原理导出一个计算喷射器引射系数的基本方程;然后用一个二维函数来近似引射流的速度分布,对导出的基本方程进行简化;最后通过数值研究和集总参数法得到了一个喷射器混合模型。与现有的模型进行比较,新模型非常简单,只有一个方程且只含3个常系数,因此该模型可以用于喷射器的实时控制与优化。文中还介绍了辨识这3个常系数的方法。最后建立了一个基于制冷剂R141B的喷射制冷系统,实验验证结果表明新模型能精确地预测喷射器的性能。 | 祝银海 厉彦忠 鱼剑琳 CAI Wenjian | 2008 | 化工学报2008，59，9： | 6 |
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