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| 1 | AXL is a candidate receptor for SARS-CoV-2 that promotes infection of pulmonary and bronchial epithelial cells显示文摘The current coronavirus disease 2019(COVID-19)pandemic presents a global public health challenge.The viral pathogen responsible,severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),binds to the host receptor ACE2 through its spike(S)glycoprotein,which mediates membrane fusion and viral entry.Although the role of ACE2 as a receptor for SARS-CoV-2 is clear,studies have shown that ACE2 expression is extremely low in various human tissues,especially in the respiratory tract.Thus,other host receptors and/or co-receptors that promote the entry of SARS-CoV-2 into cells of the respiratory system may exist.In this study,we found that the tyrosine-protein kinase receptor UFO(AXL)specifically interacts with the N-terminal domain of SARS-CoV-2 S.Using both a SARS-CoV-2 virus pseudotype and authentic SARS-CoV-2,we found that overexpression of AXL in HEK293T cells promotes SARS-CoV-2 entry as efficiently as overexpression of ACE2,while knocking out AXL significantly reduces SARS-CoV-2 infection in HI 299 pulmonary cells and in human primary lung epithelial cells.Soluble human recombinant AXL blocks SARS-CoV-2 infection in cells expressing high levels of AXL.The AXL expression level is well correlated with SARS-CoV-2 S level in bronchoalveolar lavage fluid cells from COVID-19 patients.Taken together,our findings suggest that AXL is a novel candidate receptor for SARS-CoV-2 which may play an important role in promoting viral infection of the human respiratory system and indicate that it is a potential target for future clinical intervention strategies. | Shuai Wang Zongyang Qiu Yingnan Hou Xiya Deng Wei Xu Tingting Zheng Peihan Wu Shaofang Xie Weixiang Bian Chong Zhang Zewei Sun Kunpeng Liu Chao Shan Aifu Lin Shibo Jiang Youhua Xie Qiang Zhou Lu Lu Jing Huang Xu Li | 2021 | Cell Research2021，31，2： | 39 |
| 2 | Rural vitalization in China:A perspective of land consolidation显示文摘The core objective of rural vitalization is to systemically establish a coupling pattern of various rural development elements including population,land and industry.As one of the prerequisites,land resources is required to be optimally allocated via land consolidation.Con seque ntly,la nd con solidati on con tributes greatly to population agglomeration,industrial developme nt and resources support under the con text of combati ng rural decline.Based on the key eleme nts affecting rural development,this paper elaborates the con no tation of rural vitalization and land consolidation in the new era as well as their relationships.Furthermore,the paper analyzes the alternative paths for achieving rural vitalization via land consolidation,and discusses the future directions of land consolidation and rural vitalization.The conclusions are drawn as follows:(1)To cope with the loss and decline of the intrinsic elements in rural areas,rural vitalization is a development strategy aimed at realizing economic,political,cultural and ecological rejuvenation in rural area by reshaping socio?economic morphology and spatial pattern in rural territory.(2)From the perspective of rural vitalization,land consolidation is endowed with new connotation,which should not only target at activating the key elements of rural development,but also place emphasis on coordimating material space and spirit core as well as integrating the restructuring of the physical space and the rural gov?ernance system.(3)Land consolidation should be compatible with regional natural conditions and the current stage of socio-economic development.According to the principle of regional planning and classification strategy,the appropriate models and paths should be adopted to promote the benign interactions of population,land and industry based on engineering techniques and ecological means.(4)Under the background of national strategy of rural vitaliza?tion,it is n ecessary to reshape the value orientati on of la nd con solidation based on a scie tific understanding of urban-rural relations and rural territorial functions,coordinate land consolidation planning and rural vitalization planning under the unified spatial planning system,and explore the new model combining land consolidation and multifunctional agriculture. | LONG Hualou ZHANG Yingnan TU Shuangshuang | 2019 | Journal of Geographical Sciences2019，29，4： | 33 |
| 3 | The willow genome and divergent evolution from poplar after the common genome duplication显示文摘 | Xiaogang Dai Quanjun Hu Qingle Cai Kai Feng Ning Ye Gerald A Tuskan Richard Milne Yingnan Chen Zhibing Wan Zefu Wang Wenchun Luo Kun Wang Dongshi Wan Mingxiu Wang Jun Wang Jianquan Liu Tongming Yin | 2014 | Cell Research2014，24，10： | 28 |
| 4 | Bayesian Reliability Modeling and Assessment Solution for NC Machine Tools under Small-sample Data显示文摘Although Markov chain Monte Carlo(MCMC) algorithms are accurate, many factors may cause instability when they are utilized in reliability analysis; such instability makes these algorithms unsuitable for widespread engineering applications. Thus, a reliability modeling and assessment solution aimed at small-sample data of numerical control(NC) machine tools is proposed on the basis of Bayes theories. An expert-judgment process of fusing multi-source prior information is developed to obtain the Weibull parameters' prior distributions and reduce the subjective bias of usual expert-judgment methods. The grid approximation method is applied to two-parameter Weibull distribution to derive the formulas for the parameters' posterior distributions and solve the calculation difficulty of high-dimensional integration. The method is then applied to the real data of a type of NC machine tool to implement a reliability assessment and obtain the mean time between failures(MTBF). The relative error of the proposed method is 5.8020×10-4 compared with the MTBF obtained by the MCMC algorithm. This result indicates that the proposed method is as accurate as MCMC. The newly developed solution for reliability modeling and assessment of NC machine tools under small-sample data is easy, practical, and highly suitable for widespread application in the engineering field; in addition, the solution does not reduce accuracy. | YANG Zhaojun KAN Yingnan CHEN Fei XU Binbin CHEN Chuanhai YANG Chuangui | 2015 | Chinese Journal of Mechanical Engineering2015，28，6： | 16 |
| 5 | Anticancer effect of two diterpenoid compounds isolated from Annona glabra Linn显示文摘AIM: To study the inhibitory effect of two diterpenoid compounds isolated from Annona glabra Linn (Cunabic acid and ent-kauran-19-al-17-oic acid) on the proliferation of Human Liver Cancer (HLC) cell line SMMC-7721 and its mechanism. METHODS: Inhibition of cell proliferation was measured by MTT assay. The morphological changes of SMMC-7721 cells were observed under inverted phase-contrast microscope, fluorescent microscope, transmission electron microscope (TEM), and scanning electron microscope (SEM). Flow cytometer (FCM) was used to calculate the cell apoptotic rate, and immunohistochemical staining was used to observe the regulation of gene expression. RESULTS: The proliferation of SMMC-7721 cells was obviously inhibited after being treated with Cunabic acid at the concentration >5 μmol/L and ent-kauran-19-al-17-oic acid >10 μmol/L. The biggest inhibitory effect was 81.05 % when treated with Cunabic acid at the concentration of 25 μmol/L. The effect had a linear relationship with concentration. The result indicated that drug-treated cells exhibit typical morphological changes of apoptosis, including condensed chromatin and a reduction in volume. Sub-G0/G1 peak was found by FCM analysis and the cell cycle was arrested at G0/G1 stage. The apoptotic rates of the cells treated by Cunabic acid and ent-kauran-19-al-17-oic acid were 43.31 % and 24.95 %, respectively. It was visualized by immunohis- tochemical staining that the drugs down-regulated the gene expression of bcl-2 gene and up-regulated that of bax gene. CONCLUSION: The two diterpenoid compounds isolated from Annona glabra Linn, Cunabic acid and ent- kauran-19-al-17-oic acid can obviously inhibit the proliferation of HLC cell line SMMC-7721. The mechanism is correlated with the induction of cell apoptosis by down-regulating the gene expression of bcl-2 gene and up- regulating that of bax gene. | Yong-hongZHAN Hai-yanPENG Guo-haoXIA Ming-yanWANG YingnAN | 2004 | Acta Pharmacologica Sinica2004，25，7： | 16 |
| 6 | Development of land use transitions research in China显示文摘With the introduction of the concept of land use transition into China,related researches have been carried out extensively in the past two decades,which enrich the knowledge of land system science.This paper describes the development of research on land use transitions in China from the perspectives of conceptual connotations,theoretical model,research methods,and research progress and prospects.With the in-depth investigation of land use transitions,the concept and connotations of land use morphology are developed and encapsulated as two kinds,i.e.,dominant morphology and recessive morphology.The dominant morphology refers to the land use structure of a certain region over a certain period of time,with features such as the quantity and spatial pattern of land use types.While the recessive morphology includes the land use features in the aspects of quality,property rights,management mode,input,output and function.Accordingly,the concept of land use transition is further developed,and the theoretical model of regional land use transitions is established.Thereafter,three innovative integrated approaches to study land use transitions are put forward,i.e.,multidisciplinary research framework for recessive land use transition,transect and horizontal comparison.To date,there have been 62 Ph.D.and 166 M.S.dissertations on the topic of'land use transition'in China.During 2002–2019,the National Natural Science Foundation of China has funded 48 research programs on the theme of'land use transition'.As such,the Chinese scholars have adapted the concept derived from western literature to the situations and experiences in China. | LONG Hualou QU Yi TU Shuangshuang ZHANG Yingnan JIANG Yanfeng | 2020 | Journal of Geographical Sciences2020，30，7： | 15 |
| 7 | PREPARATIOPREPARATION OF 1-OCTENE BY ETHYLENE TETRAMERIZATION WITH HIGH SELECTIVITY显示文摘Two novel PNP ligands have been synthesized and characterized by 1H-NMR, elemen- tal analysis, and mass spectra. In combination with Cr(Ⅲ ) and cocatalyst MAO, they generate active catalytic systems that tetramerize ethylene with both high catalytic activity and high selectivity to produce 1-octene. The results show that these catalyst sys- tems are able to catalyze ethylene tetramerization, with high catalytic activity up to 0.89×106 g/mol Cr.h, and the selectivity of C8 in products is 72.52%, and the percentage of 1-olefins in the C8 cut is 97.87%. | JIANG Tao CHEN Hongxia NING Yingnan CHEN Wei | 2006 | Chinese Science Bulletin2006，51，5： | 13 |
| 8 | Ethylene tetramerization with a highly active and long-lifetime trinuclear diphenylphosphinoamine/Cr(III)/MAO catalyst显示文摘The synthesis and characterization of a novel trinuclear diphosphinoamine ligand 2 are reported. The ligand combined with Cr(III), activated with methylaluminoxane, lead to highly active and long-lifetime catalytic systems for the tetramerization of ethylene to form 1-octene. The effects of reaction temperature, reaction pressure, molar ratio of Al/Cr and bis(diphenylphosphino)amine/Cr on the catalytic activity and product selectivity were studied. Compared with its mononuclear analogue 1, ligand 2 showed a higher catalytic activity and longer lifetime for ethylene tetramerization in the presence of methylaluminoxane as cocatalyst. High molecular weight polyethylene was generated as a by-product with extremely broad molecular weight distributions. | JIANG Tao TAO YiQing GAO XiangLu MAO GuoLiang CHEN HongXia CAO ChenGang NING YingNan | 2012 | Chinese Science Bulletin2012，57，13： | 12 |
| 9 | Synthesis of a novel triple-site diphosphinoamine (PNP) ligand and its applications in ethylene tetramerization显示文摘A novel triple-site diphosphinoamine (PNP) ligand was synthesized and characterized. In combination with Cr(III) and methylaluminoxane (MAO), it generated active catalytic systems for ethylene tetramerization toward 1-octene with high catalytic activity and long lifetime. The effects of reaction temperature, molar ratio of Al/Cr and molar ratio of ligand/Cr on catalytic activity and selectivity to 1-octene were studied with reaction kinetics of the catalytic system for ethylene tetramerization described. At the Al/Cr molar ratio of 100, the catalytic activity is up to 2.29×106 g·mol-1 (Cr)·h-1 and the selectivity to 1-octene is 49.65 wt%. | MAO GuoLiang NING YingNan HU WenBo LI ShanMing SONG XianFeng NIU Bo JIANG Tao | 2008 | Chinese Science Bulletin2008，53，22： | 11 |
| 10 | Study the ethanol SI/HCCI combustion mode transition by using the fast thermal management system显示文摘In this paper the ethanol homogeneous charge compression ignition (HCCI) is achieved in a modified single cylinder engine by means of a self-developed fast thermal management system (FTMS), and the ethanol SI/HCCI operation regions are defined. It can be concluded that the thermal efficiency is higher and the NOx emission is lower in the HCCI operation region. In addition, the maximum NOx emission drops by 98%. The ethanol SI/HCCI combustion mode transition is conducted in different conditions near the SI/HCCI operation boundaries. It is likely to realize the transition by the utilization of FTMS. However, it is impossible to complete the transition within one operating cycle under current operation conditions. There are fluctuations in engine speed and brake mean effective pressure during the transition process. In order to reduce the fluctuations during the transition, the initial work concerning the effects of the spark ignition on the transition smoothness is carried out and the investigation indicates that the engine speed and brake mean effective pressure fluctuations cannot be eradicated only through spark ignition. Therefore, the control strategies combined with other factors should be further optimized. | PENG YaPing TAN ManZhi GUO Liang LIU FaFa LI Hua GUO YingNan | 2007 | Chinese Science Bulletin2007，52，19： | 8 |
| 11 | Diode-pumped power scalable Kerr-lens mode-locked Yb:CYA laser显示文摘Stable 68 fs pulses with the average power of 1.5 W is directly generated from a multimode diode-pumped Kerr-lens mode-locked Yb:CYA laser by separating the gain medium and Kerr medium. The repetition rate is about 50 MHz, resulting in a single pulse energy of 30 n J and a peak power of 0.44 MW. To the best of our knowledge, this is the highest single pulse energy ever produced from a mode-locked Yb:CYA oscillator. Our experimental results show that Yb:CYA crystal is an excellent candidate for multiwatt, sub-100 fs pulse generation in diode-pumped all-solid-state lasers. It is believed that the output power can be scalable to multi-W while the pulse duration is maintained with this simple method. | WENLONG TIAN YINGNAN PENG ZIYUE ZHANG ZIJIAO YU JIANGFENG ZHU XIAODONG XU ZHIYI WEI | 2018 | Photonics Research2018，6，2： | 8 |
| 12 | Numerical study on non-uniform heat transfer deterioration of supercritical RP-3 aviation kerosene in a horizontal tube显示文摘The convective heat transfer of supercritical-pressure RP-3(Rocket Propellant 3)aviation kerosene in a horizontal circular tube has been numerically studied,focusing mainly on the non-uniform heat transfer deterioration along the circumferential direction.The governing equations of mass,momentum and energy have been solved using the pressure-based segregated solver based on the finite volume method.The re-normalization group(RNG)k-εturbulence model with an enhanced wall treatment was selected.Considering the heat conduction in the solid wall,the mechanism of heat transfer deterioration and the buoyancy effect on deteriorated heat transfer were discussed.The evolution of secondary flow was analyzed.Effects of the outer-wall heat flux,mass flux,pressure and tube thermal conductivity on heat transfer were investigated.Moreover,the buoyancy criterion and the heat transfer correlation were obtained.Results indicate that the poor flow performance of near-wall fluid causes the pseudo-film boiling,further leads to the heat transfer deterioration.The strong buoyancy has an effect of enhancing the heat transfer at the bottom of tube,and weakening the heat transfer at the top of tube,which results in the non-uniform inner-wall temperature and heat flux distributions.Decreasing the ratio of outer-wall heat flux and mass flux,increasing the pressure could weaken the heat transfer difference along the circumferential direction,while the effect of thermal conductivity of tube on the circumferential parameters distributions is more complicated.When the buoyancy criterion of(Grq/Grth)max≤0.8 is satisfied,the effect of buoyancy could be ignored.The new correlations work well for non-uniform heat transfer predictions. | Yanhong Wang Yingnan Lu Sufen Li Ming Dong | 2020 | Chinese Journal of Chemical Engineering2020，28，6： | 7 |
| 13 | The Arabidopsis Anaphase-Promoting Complex/Cyclosome Subunit 1 is Critical for Both Female Gametogenesis and Embryogenesis显示文摘Anaphase-promoting complex/cyclosome (APC/C), a multisubunit E3 ligase, plays a critical role in cell cycle control, but the functional characterization of each subunit has not yet been completed. To investigate the function of APC1 in Arabidopsis, we analyzed four mutant alleles of APC1, and found that mutation in APC1 resulted in significantly reduced plant fertility, accumulation of cyclin B, and disrupted auxin distribution in embryos. The three mutant alleles apc1-1, apc1-2 and apc1-3 shared variable defects in female gametogenesis including degradation, abnormal nuclear number, and disrupted polarity of nuclei in the embryo sac as well as in embryogenesis, in which embryos were arrested at multiple stages. All of these defects are similar to those previously identified in apc4. The mutant apc1-4, in which the T-DNA was inserted after the transmembrane domain at the C-terminus, showed much more severe phenotypes; that is, most of the ovules were arrested at the one-nucleate female gametophyte stage (stage FG1). In the apc1 apc4 double mutants, the fertility was further reduced by one-third in apc1-1/+ apc4-1/+, and in some cases no ovules even survived in siliques of apc1-4/+ apc4-1/+. Our data thus suggest that APC1, an essential component of APC/C, plays a synergistic role with APC4 both in female gametogenesis and in embryogenesis. | Yanbing Wang Yingnan Hou Hongya Gu Dingming Kang Zhang-Liang Chen Jingjing Liu Li-Jia Qu | 2013 | Journal of Integrative Plant Biology2013，55，1： | 7 |
| 14 | Benefit of everolimus as a monotherapy for a refractory breast cancer patient bearing multiple genetic mutations in the PI3K/AKT/mTOR signaling pathway显示文摘A postmenopausal patient with a diagnosis of estrogen receptor(ER)(+), progesterone receptor(PR)(+), and human epidermal growth factor receptor-2(HER2)(-) breast cancer was reported. The patient refused surgery and was resistant to conventional chemotherapy regimens. Computed tomography and the circulating tumor cell test indicated that the patient's tumor burden increased rapidly even after several chemotherapy sessions. Multiple genetic aberrances in the phosphatidylinositol3-kinases(PI3 K) signaling pathway were detected via next-generation sequencing(NGS)-based liquid biopsy, including a p. G1007 R missense mutation in exon 21 of PIK3 CA(33.61%), a p.L70 fs frameshift mutation in exon 3 of phosphatase and tension homolog deleted on chromosome ten(PTEN)(49.14%), and a p. D1542 Y missense mutation in exon 32 of mammalian target of rapamycin(m TOR)(1.66%). Therefore, only the m TOR inhibitor everolimus was administered to the patient. Partial remission(PR) was observed after 2 months, and sustained stable disease(SD) was observed after a year and a half. Subsequent sequencing showed that the mutation ratio of PIK3 CA decreased to 4.17%, and that the PTEN and m TOR mutations disappeared, which revealed the significant curative effect of everolimus. We report the first case of successful monotherapy treatment using everolimus in a patient with advanced breast cancer bearing mutations in genes involved in the PI3 K/ARK/m TOR signaling pathway. The success of this case highlights the invaluable clinical contribution of NGS-based liquid biopsy, as it successfully provided an optimal therapeutic target for the patient with advanced breast cancer. | Yehui Shi Wenwen Zhang Yingnan Ye Yanan Cheng Lei Han Pengpeng Liu Weipeng Zhao Zhongsheng Tong Jinpu Yu | 2018 | Cancer Biology & Medicine2018，15，3： | 6 |
| 15 | Development of a large-scale remote sensing ecological index in arid areas and its application in the Aral Sea Basin显示文摘The Aral Sea Basin in Central Asia is an important geographical environment unit in the center of Eurasia.It is of great significance to the ecological protection and sustainable development of Central Asia to carry out dynamic monitoring and effective evaluation of the eco-environmental quality of the Aral Sea Basin.In this study,the arid remote sensing ecological index(ARSEI)for large-scale arid areas was developed,which coupled the information of the greenness index,the salinity index,the humidity index,the heat index,and the land degradation index of arid areas.The ARSEI was used to monitor and evaluate the eco-environmental quality of the Aral Sea Basin from 2000 to 2019.The results show that the greenness index,the humidity index and the land degradation index had a positive impact on the quality of the ecological environment in the Aral Sea Basin,while the salinity index and the heat index exerted a negative impact on the quality of the ecological environment.The eco-environmental quality of the Aral Sea Basin demonstrated a trend of initial improvement,followed by deterioration,and finally further improvement.The spatial variation of these changes was significant.From 2000 to 2019,grassland and wasteland(saline alkali land and sandy land)in the central and western parts of the basin had the worst ecological environment quality.The areas with poor ecological environment quality are mainly distributed in rivers,wetlands,and cultivated land around lakes.During the period from 2000 to 2019,except for the surrounding areas of the Aral Sea,the ecological environment quality in other areas of the Aral Sea Basin has been improved in general.The correlation coefficients between the change in the eco-environmental quality and the heat index and between the change in the eco-environmental quality and the humidity index were–0.593 and 0.524,respectively.Climate conditions and human activities have led to different combinations of heat and humidity changes in the eco-environmental quality of the Aral Sea Basin.However,human activities had a greater impact.The ARSEI can quantitatively and intuitively reflect the scale and causes of large-scale and long-time period changes of the eco-environmental quality in arid areas;it is very suitable for the study of the eco-environmental quality in arid areas. | WANG Jie LIU Dongwei MA Jiali CHENG Yingnan WANG Lixin | 2021 | Journal of Arid Land2021，13，1： | 5 |
| 16 | A Novel Video Reversible Data Hiding Algorithm Using Motion Vector for H.264/AVC显示文摘A novel reversible data hiding algorithm for H.264/AVC videos is proposed.Histogram Shifting(HS) of motion vector values is used efficiently in reversible data hiding to embed data.By designating a specific decoded reference frame,the distortion accumulation effects due to modification of the motion vectors is overcome.All the extracted information can be recovered without loss of the original compressed video carrier.The experimental results show that the proposed algorithm is simple,has higher capacity and invisibility than other existing schemes,and can adjust the relationship between capacity and invisibility according to embedded load. | Ke Niu Xiaoyuan Yang Yingnan Zhang | 2017 | Tsinghua Science and Technology2017，22，5： | 5 |
| 17 | Ce-modified AlZr pillared clays supported-transition metals for catalytic combustion of chlorobenzene显示文摘In this article, we provided a one-step hydrothermal method to prepare composite AlZr pillaring agents,and synthesized AlZr-pillared clays(AlZr-PILC) via ion exchange. Compared with conventional methods,our method successfully shortened synthetic routes and greatly reduced consumption of the materials.Then, AlZr-PILC-supported manganese and cerium oxide catalysts were obtained by impregnation method. The compositions and properties of these catalysts were characterized by some technical means.The energy dispersive X-ray spectroscopy clearly shows the existence of Mn, Ce, and O, which indicates the successful loading of the active components on the surface of AlZr-PILC. Meanwhile, the results of Xray diffraction(XRD) and N_2 adsorption experiments demonstrate that the synthesized AlZr-PILC outperforms the raw clays(Na-mmt) and mononuclear AI-PILC in the catalytic combustion of chlorobenzene. XRD and high-re solution transmission electron microscopy also proves that the high activity of them is related to the high dispersion of the oxides and the exposure of more active sites. H_2-temperature-programmed reduction shows that cerium can promote the redox cycles of the manganese system through the strong interactions between MnO_2, CeO_2 and AlZr-PILC. In particular, MnCe(9:1)/AlZr-PILC shows the best catalytic activity in the catalytic combustion of chlorobenzene. | Binbin Feng Yingxi Wei Yingnan Qiu Shufeng Zuo Na Ye | 2018 | Journal of Rare Earths2018，36，11： | 4 |
| 18 | Study of the correlations between main shocks and aftershocks and aftershock synthesis method显示文摘To consider the infl uence of aftershocks in engineering design, the correlations between main shocks and aftershocks should be examined, and an aftershock simulation method with main shock ground motions needs to be developed. In this study, the data on the sequences of main shock–aftershock ground motions and other related parameters were collected. Using these data, correlations between the magnitude, frequency, duration and energy of the main shock–aftershock ground motions were investigated. The results showed that the magnitude of the aftershock can be larger than that of the main shock. The shapes of the Fourier amplitude spectra of main shocks and aftershocks were similar;however, the predominant frequency and high-frequency components of the aftershock tended to be larger. Considering the magnitude diff erence between the main shock and the aftershock, the correlation of durations was explored. Additionally, a new concept, the duration ratio, was defi ned to describe the concentration of seismic energy release, and main shock energy was strongly positively correlated with the energy attenuated during the main shock–aftershock sequence. Finally, based on these results regarding correlation, an aftershock synthesis using recorded main shock ground motions was constructed with the trigonometric series method for seismic design, and some examples are given to analyze the rationality of this synthetic method. | Zhang Yingnan Zhi Xudong Fan Feng | 2019 | Earthquake Engineering and Engineering Vibration2019，18，4： | 4 |
| 19 | Novel Video Steganography Algorithm Based on Secret Sharing and Error-Correcting Code for H.264/AVC显示文摘In this paper, we analyze the video steganography technique, which is used to ensure national security and the confidentiality of the information of governmental agencies and enterprises. Videos may be used to transmit secrets and conduct covert communication. As such, we present an algorithm based on a secret sharing scheme and an Error-Correcting Code(ECC), which combines Grey Relational Analysis(GRA) with a partition mode in video compression standard H.264/AVC. First, we process secret information by secret sharing, and then use an ECC to process the obtained information. Moreover, we choose the Discrete Cosine Transform(DCT) blocks using GRA, and then use rules to hide the pretreated information in DCT coefficients of the video frames. Experimental results indicate that our algorithm has good invisibility, better robustness, good anti-steganalysis ability, and little influence on the bit rate of the video carrier. In addition, the bit error rate is low after attacks such as noise, filtering,or frame loss in the simulation environment. | Yingnan Zhang Minqing Zhang Xiaoyuan Yang Duntao Guo Longfei Liu | 2017 | Tsinghua Science and Technology2017，22，2： | 4 |
| 20 | Probing the fractional topological charge of a vortex light beam by using dynamic angular double slits显示文摘Vortex beams with fractional topological charge(FTC) have many special characteristics and novel applications.However, one of the obstacles for their application is the difficulty of precisely determining the FTC of fractional vortex beams. We find that when a vortex beam with an FTC illuminates a dynamic angular double slit(ADS), the far-field interference patterns that include the information of the FTC of the beam at the angular bisector direction of the ADS vary periodically. Based on this property, a simple dynamic ADS device and data fitting method can be used to precisely measure the FTC of a vortex light beam with an error of less than 5%. | Jing Zhu Pei Zhang Dongzhi Fu Dongxu Chen Ruifeng Liu Yingnan Zhou Hong Gao Fuli Li | 2016 | Photonics Research2016，4，5： | 4 |
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