|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Periodicity and Stability in Periodic n-Species Lotka-Volterra Competition System with Feedback Controls and Deviating Arguments显示文摘By using the method of coincidence degree and Lyapunov functional, a set of easily applicable criteria are established for the global existence and global asymptotic stability of strictly positive(componentwise)periodic solution of a periodic n-species Lotka-Volterra competition system with feedback controls and several deviating arguments.The problem considered in this paper is in many aspects more general and incorporate as special cases various problems which have been studied extensively in the literature.Moreover,our new criteria,which improve and generalize some well known results, can be easily checked. | MengFAN KeWANG PatriciaJ.Y.WONG RaviP.AGARWAL | 2003 | Acta Mathematica Sinica,English Series2003，19，4： | 17 |
| 2 | Architectural proteins for the formation and maintenance of the 3D genome显示文摘Eukaryotic genomes are densely packaged into hierarchical three-dimensional(3D) structures that contain information about gene regulation and many other biological processes. With the development of imaging and sequencing-based technologies, 3D genome studies have revealed that the high-order chromatin structure is composed of hierarchical levels, including chromosome territories, A/B compartments, topologically associated domains, and chromatin loops. However, how this chromatin architecture is formed and maintained is not completely clear. In this review, we introduce experimental methods to investigate the 3D genome, review major architectural proteins that regulate 3D chromatin organization in mammalian cells, such as CTCF(CCCTC-binding factor), cohesin, lamins, and transcription factors, and discuss relevant mechanisms such as phase separation. | Mengfan Li Jingbo Gan Yuao Sun Zihan Xu Junsheng Yang Yujie Sun Cheng Li | 2020 | Science China(Life Sciences)2020，63，6： | 7 |
| 3 | X-ray pulsar-based navigation using pulse phase and Doppler frequency measurements显示文摘In order to eliminate the impact of the Doppler effects caused by the motion of the spacecraft on the X-ray pulsar-based navigation, an innovative navigation method using the pulse phase and Doppler frequency measurements of the X-ray pulsars is proposed. Given the initial estimate of the spacecraft's state,the real-time photon arrival model is established at the spacecraft with respect to the spacecraft's position and velocity predicted by the orbit dynamic model and their estimation errors. On this basis, a maximum likelihood estimation algorithm directly using the observed photon event timestamps is developed to extract a single pair of pulse phase and Doppler frequency measurements caused by the spacecraft's state estimation error. Since the phase estimation error increases as the observation time increases, we propose a new measurement updating scheme of referring the measurements to the middle time of an observation interval. By using the ground-based simulation system of X-ray pulsar signals, a series of photon-level simulations are performed. The results testify to the feasibility and real-timeliness of the proposed navigation method, and show that the incorporation of the Doppler measurement as well as the pulse phase into the navigation filter can improve the navigation accuracy. | XUE MengFan LI XiaoPing FU LingZhong FANG HaiYan SUN HaiFeng SHEN LiRong | 2015 | Science China Chemistry2015，58，12： | 5 |
| 4 | Ultracompact dual-mode waveguide crossing based on subwavelength multimode-interference couplers显示文摘We propose and experimentally demonstrate a novel ultracompact dual-mode waveguide crossing based on subwavelength multimode-interference couplers for a densely integrated on-chip mode-division multiplexing system.By engineering the lateral-cladding material index and manipulating phase profiles of light at the nanoscale using an improved inverse design method, a subwavelength structure could theoretically realize the identical beat length for both TE_0 and TE1, which can reduce the scale of the device greatly. The fabricated device occupied a footprint of only 4.8 μm× 4.8 μm. The measured insertion losses and crosstalks were less than 0.6 d B and-24 d B from 1530 nm to 1590 nm for both TE0 and TE1 modes, respectively. Furthermore, our scheme could also be expandedto design waveguide crossings that support more modes. | WEIJIE CHANG LULUZI LU XINSHU REN DONGYU LI ZEPENG PAN MENGFAN CHENG DEMING LIU MINMING ZHANG | 2018 | Photonics Research2018，6，7： | 4 |
| 5 | Denoising of X-ray pulsar observed profile using biorthogonal lifting wavelet transform显示文摘In X-ray pulsar-based navigation, strong X-ray background noise leads to a low signal-to-noise ratio(SNR) of the observed profile, which consequently makes it very difficult to obtain an accurate pulse phase that directly determines the navigation precision. This signifies the necessity of denoising of the observed profile. Considering that the ultimate goal of denoising is to enhance the pulse phase estimation, a profile denoising algorithm is proposed by fusing the biorthogonal lifting wavelet transform of the linear phase characteristic with the thresholding technique. The statistical properties of X-ray background noise after epoch folding are studied. Then a wavelet-scale dependent threshold is introduced to overcome correlations between wavelet coefficients. Moreover, a modified hyperbola shrinking function is presented to remove the impulsive oscillations of the observed profile. The results of numerical simulations and real data experiments indicate that the proposed method can effectively improve SNR of the observed profile and pulse phase estimation accuracy, especially in short observation durations. And it also outperforms the Donoho thresholding strategy normally used in combination with the orthogonal discrete wavelet transform. | Mengfan Xue Xiaoping Li Yanming Liu Haiyan Fang Haifeng Sun Lirong Shen | 2016 | Journal of Systems Engineering and Electronics2016，27，3： | 3 |
| 6 | Reconstruction methodology for rational secret sharing based on mechanism design显示文摘Rational secret sharing[1]is the intersection of game theory[2]and traditional secret sharing[3].In rational secret sharing,the players are selfish and always behave in accordance with profit maximization.What this implies,primarily,is that rational players prefer obtaining the secret rather than not obtaining it and,secondarily,that players prefer as few other players as possible obtaining the secret.Motivated by selfishness,rational players either keep silent or send incorrect shares during the reconstruction phase,thereby the | Hai LIU Xinghua LI Jianfeng MA Mengfan XU Jingjing GUO | 2017 | Science China(Information Sciences)2017，60，8： | 3 |
| 7 | Identification of sources,characteristics and photochemical transformations of dissolved organic matter with EEM-PARAFAC in the Wei River of China显示文摘Dissolved organic matter(DOM)in rivers is a critical regulator of the cycling and toxicity of pollutants and the behavior of DOM is a key indicator for the health of the environment.We investigated the sources and characteristics of DOM in surface water and sediment samples of the Wei River,China.Dissolved organic carbon(DOC)concentration and ultraviolet absorbance at 254 nm(UV254)increased in the surface water and were decreased in the sediment downstream,indicating that the source of DOM in the water differed from the sediment.Parallel factor(PARAFAC)analysis of the excitation-emission matrices(EEM)revealed the presence of terrestrial humus-like,microbial humus-like and tryptophan-like proteins in the surface water,whereas the sediment contained UVA humic-like,UVC humic-like and fulvic-like in the sediment.The DOM in the surface water and sediment were mainly derived from microbial metabolic activity and the surrounding soil.Surface water DOM displayed greater photodegradation potential than sediment DOM.PARAFAC analysis indicated that the terrestrial humic-like substance in the water and the fulvic-like component in the sediment decomposed more rapidly.These data describe the characteristics of DOM in the Wei River and are crucial to understanding the fluctuations in environmental patterns. | Yuanyuan Luo Yangyang Zhang Mengfan Lang Xuetao Guo Tianjiao Xia Tiecheng Wang Hanzhong Jia Lingyan Zhu | 2021 | Frontiers of Environmental Science & Engineering2021，15，5： | 2 |
| 8 | How defects influence the photoluminescence of TMDCs显示文摘Two-dimensional(2D)transition metal dichalcogenide(TMDC)monolayers,a class of ultrathin materials with a direct bandgap and high exciton binding energies,provide an ideal platform to study the photoluminescence(PL)of light-emitting devices.Atomically thin TMDCs usually contain various defects,which enrich the lattice structure and give rise to many intriguing properties.As the influences of defects can be either detrimental or beneficial,a comprehensive understanding of the internal mechanisms underlying defect behaviour is required for PL tailoring.Herein,recent advances in the defect influences on PL emission are summarized and discussed.Fundamental mechanisms are the focus of this review,such as radiative/nonradiative recombination kinetics and band structure modification.Both challenges and opportunities are present in the field of defect manipulation,and the exploration of mechanisms is expected tofacilitate the applications of 2D TMDCs in the future. | Mengfan Zhou Wenhui Wang Junpeng Lu Zhenhua Ni | 2021 | Nano Research2021，14，1： | 2 |
| 9 | High-speed optical secure communication with an external noise source and an internal time-delayed feedback loop显示文摘We propose and experimentally demonstrate a novel physical layer encryption scheme for high-speed optical communication. A 10 Gb/s on-off keying signal is secretly transmitted over 100 km standard single-mode fiber.The intensity-modulated message is secured by the encryption mechanism, which is composed of an external noise source and an internal time-delayed feedback loop. The external noise serves as an entropy source with sufficient randomness. The feedback loop structure in the transmitter introduces a time-domain encryption key space, and a corresponding open-loop configuration at the receiver side is used for synchronization and decryption.Experiment results show the effectiveness of the proposed scheme. For a legitimate terminal, bit error rate below10-8 can be obtained. Decryption degradations with the mismatch of different hardware parameters are researched. The time delay in the feedback loop provides a sensitive encryption key. For other hardware parameters,the system is robust enough for synchronization. Meanwhile, the time-delay signature of the loop is able to be well concealed by the external noise. Moreover, the proposed scheme can support density wavelength division multiplexing transmission with a relatively simple structure. This work also provides a new concept to establish optical secure communication by combining a time-delayed feedback chaotic system and random noise. | YUDI FU MENGFAN CHENG XINGXING JIANG QUAN YU LINBOJIE HUANG LEI DENG DEMING LIU | 2019 | Photonics Research2019，7，11： | 2 |
| 10 | Different effect of glutamine on macrophage tumor necrosis factor-alpha release and heat shock protein 72 expression in vitro and in vivo显示文摘巨噬细胞在败血起一个重要作用。然而, macrophage/monocyte-mediate cytokines 版本上的夫酸安(Gln ) 的调节效果仍然是争论的。因此,我们在巨噬细胞肿瘤坏死因素(TNF ) 上调查了 Gln 的效果 - 版本和热吃惊蛋白质(HSP ) 在 vivo 并且在 vitro 的 72 表示。从我们的学习的数据显示 HSP72 表示的增加在在 lipopolysaccharide (LPS ) 以后的 Gln 4 h 的 8 公里是重要的刺激并且在 24 h 变得独立于 Gln 集中,而 TNF- 版本在 Gln 上是剂量依赖者和时间依赖者。热应力(HS ) 与 non-HS 组相比导致了更多的 HSP72 和更少 TNF- 生产。然而,在有 HS 的房间 pretreated 的 TNF- 的生产与增加 Gln 的集中被增加。有为 1 h 的 Gln 然后为 4 h 的 0.5 公里 Gln 的各种各样的集中的处理在 HSP72 表示,然而并非在 TNF- 生产导致了增加。在败血模型老鼠, Gln 处理导致了在 HSP72 表示的显著地更低的细胞内部的 TNF- 水平和老鼠腹巨噬细胞的增加。我们的结果证明 Gln 直接以一种剂量依赖者方式增加刺激 LPS 的 RAW264.7 巨噬细胞的 TNF- 版本,并且也减少在败血模型的老鼠腹巨噬细胞 TNF- 版本。一起拿,我们的数据建议可以有 Gln 在败血期间在巨噬细胞除 HSP72 表示以外由调制 cytokine 生产的更另外的小径。 | Mengfan Liang Xuemin Wang Yuan Yuan Quanhong Zhou Chuanyao Tong Wei Jiang | 2009 | Acta Biochimica et Biophysica Sinica2009，41，2： | 2 |
| 11 | Screening for thyroid dysfunction during the second trimester of pregnancy显示文摘 | Wei Qian Lijun Zhang Mi Han Shuzin Khor Jun Tao Mengfan Song Jianxia Fan | 2013 | Gynecological Endocrinology2013，，12： | 1 |
| 12 | Quantum-safe cryptography:crossroads of coding theory and cryptography显示文摘We present an overview of quantum-safe cryptography(QSC)with a focus on post-quantum cryptography(PQC)and information-theoretic security.From a cryptographic point of view,lattice and code-based schemes are among the most promising PQC solutions.Both approaches are based on the hardness of decoding problems of linear codes with different metrics.From an information-theoretic point of view,lattices and linear codes can be constructed to achieve certain secrecy quantities for wiretap channels as is intrinsically classical-and quantum-safe.Historically,coding theory and cryptography are intimately connected since Shannon’s pioneering studies but have somehow diverged later.QSC offers an opportunity to rebuild the synergy of the two areas,hopefully leading to further development beyond the NIST PQC standardization process.In this paper,we provide a survey of lattice and code designs that are believed to be quantum-safe in the area of cryptography or coding theory.The interplay and similarities between the two areas are discussed.We also conclude our understandings and prospects of future research after NIST PQC standardisation. | Jiabo WANG Ling LIU Shanxiang LYU Zheng WANG Mengfan ZHENG Fuchun LIN Zhao CHEN Liuguo YIN Xiaofu WU Cong LING | 2022 | Science China(Information Sciences)2022，65，1： | 1 |
| 13 | Backbone fractal di- mension and fractal hybrid orbital of protein structure显示文摘 | Xin Peng Wei Qi Mengfan Wang | 2013 | Com- mun Nonlinear Sci Numer Simulat2013，18，： | 1 |
| 14 | A combined algorithm of K-means and MTRL for multi-class classification显示文摘The basic idea of multi-class classification is a disassembly method,which is to decompose a multi-class classification task into several binary classification tasks.In order to improve the accuracy of multi-class classification in the case of insufficient samples,this paper proposes a multi-class classification method combining K-means and multi-task relationship learning(MTRL).The method first uses the split method of One vs.Rest to disassemble the multi-class classification task into binary classification tasks.K-means is used to down sample the dataset of each task,which can prevent over-fitting of the model while reducing training costs.Finally,the sampled dataset is applied to the MTRL,and multiple binary classifiers are trained together.With the help of MTRL,this method can utilize the inter-task association to train the model,and achieve the purpose of improving the classification accuracy of each binary classifier.The effectiveness of the proposed approach is demonstrated by experimental results on the Iris dataset,Wine dataset,Multiple Features dataset,Wireless Indoor Localization dataset and Avila dataset. | XUE Mengfan HAN Lei PENG Dongliang | 2019 | Journal of Systems Engineering and Electronics2019，30，5： | 1 |
| 15 | Preparation and properties of konjac glucomannan oetenyl succinate modified by microwave method显示文摘 | MengFan - bing ZhengLian - ji WangYong - hong | 2014 | Food Hydrocolloids2014，38，： | 1 |
| 16 | Fine-mapping and validation of the genomic region underpinning pear red skin colour显示文摘Red skin colour is an important target trait in various pear breeding programmes.In this study,the genetic control of red skin colour was investigated in an interspecific population derived using the descendants of the red sport European pear cultivar‘Max Red Bartlett’(MRB)and the red-blushed Chinese pear cultivar‘Huobali’.Approximately 550 seedlings from nine families were phenotyped for red skin over-colour coverage(Ocolcov)and the intensity of red over-colour(Ocolint)on a 0–9 scale,and genotyped using genotyping-by-sequencing.Genome-wide association analyses were conducted using 7500 high-quality single nucleotide polymorphisms(SNPs).Genomic regions on linkage groups(LG)4 and 5 were found to be associated,and the best SNP(S578_25116)on LG4 accounted for~15%of phenotypic variation in Ocolcov and Ocolint.The association of S578_25116 with Ocolcov and Ocolint was successfully validated in a sample of~200 European and Asian pear accessions.The association with red skin at locus S578_25116 was not present in Asian pear accessions,suggesting its close proximity to the MRB’s Cardinal gene.Several putative candidate genes,including MYB transcription factors(PCP027962 and PCP027967),were identified in the quantitative trait locus region on LG4 and await functional validation. | Satish Kumar Chris Kirk Cecilia Hong Deng Claudia Wiedow Mengfan Qin Richard Espley Jun Wu Lester Brewer | 2019 | Horticulture Research2019，6，1： | 1 |
| 17 | 显示文摘 | MENGFan ZHUMing-feng ZHANGZi-xiang etal(孟凡 朱明峰 张自翔 等) | | 江西中医学院学报0，，： | 1 |
| 18 | Secure OFDM-PON system based on chaos and fractional Fourier transform techniques显示文摘 | Deng Lei Cheng Mengfan Wang Xiaolong | 2014 | Journal of Lightwave Technology2014，32，15： | 1 |
| 19 | Metabolic regulation mechanism of Aconiti Radix Cocta extract in rats based on ^(1)H-NMR metabonomics显示文摘Objective:To establish a metabonomics research technique based on the combination of^(1)H-NMR and multivariate statistical analysis,so as to explore the metabolic regulation mechanism of Aconiti Radix Cocta extract(ARCE)in rat tissues and serum.Methods:SD rats were randomly divided into blank group,female group and male group.The^(1)H-NMR technique was used to collect the information of rat tissues and serum samples in each group.The principal component analysis(PCA),partial least squares discriminant analysis(PLS-DA)and other methods were used for data pattern recognition,so as to screen out potential differential metabolites and metabolic pathways,and then network analysis and KEGG database were used to analyze the relationship between metabolites,metabolic pathways and diseases.Results:The external features and^(1)H-NMR analysis showed that the sex of rats had no obvious effect on the drug action.A total of 15 potential differential metabolites and six metabolic pathways were screened out through data pattern recognition.Through network analysis and KEGG pathway analysis,three target diseases closely related to differential metabolites were found,and the metabolic pathway related to lung cancer was the central carbon metabolism of cancer.Conclusion:This study shows that Aconiti Radix Cocta(ARC)may regulate the energy metabolism of the body by influencing arginine synthesis,so as to play the roles of anti-inflammation,analgesia,anti-tumor and immune regulation. | Wenfang Jin Jianli Bi Sheng Xu Mengfan Rao Qi Wang Yan Yuan Baolei Fan | 2022 | Chinese Herbal Medicines2022，14，4： | 1 |
| 20 | Stretchable polymer composites with ultrahigh piezoelectric performance显示文摘Flexible piezoelectric materials capable of withstanding large deformation play key roles in flexible electronics.Ferroelectric ceramics with a high piezoelectric coefficient are inherently brittle,whereas polar polymers exhibit a low piezoelectric coefficient.Here we report a highly stretchable/compressible piezoelectric composite composed of ferroelectric ceramic skeleton,elastomer matrix and relaxor ferroelectric-based hybrid at the ceramic/matrix interface as dielectric transition layers,exhibiting a giant piezoelectric coefficient of 250 picometers per volt,high electromechanical coupling factor keff of 65%,ultralow acoustic impedance of 3MRyl and high cyclic stability under 50%compression strain.The superior flexibility and piezoelectric properties are attributed to the electric polarization and mechanical load transfer paths formed by the ceramic skeleton,and dielectric mismatch mitigation between ceramic fillers and elastomer matrix by the dielectric transition layer.The synergistic fusion of ultrahigh piezoelectric properties and superior flexibility in these polymer composites is expected to drive emerging applications in flexible smart electronics. | Tongxiang Tang Zhonghui Shen Jian Wang Shiqi Xu Jiaxi Jiang Jiahui Chang Mengfan Guo Youjun Fan Yao Xiao Zhihao Dong Houbing Huang Xiaoyan Li Yihui Zhang Danyang Wang Long-Qing Chen Ke Wang Shujun Zhang Ce-Wen Nan Yang Shen | 2023 | National Science Review2023，10，8： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员