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Regulation and application of supramolecular gel with circularly polarized luminescence

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Science China Chemistry 2024年第6期67卷 1865-1880页

作者： shen song Yulong Shi Liangliang Zhu Bingbing Yue School of Materials and Chemistry&Institute of Bismuth and Rhenium University of Shanghai for Science and TechnologyShanghai200093China State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai200438China

Supermolecular gel is a three-dimensional network structure assembled by small molecules or polymers in solvents through noncovalent *** emergence of system complexity occurs spontaneously during the molecular self-assembly process.A multitude of chiral molecular self-assembly systems have been engineered,facilitating the achievement of circularly polarized luminescence(CPL)through the amalgamation of chiral entities with *** bonding,π-πstacking,and noncovalent forces,such as host-guest interactions and Van der Waals'forces,confer upon supramolecular gels the capacity to react to diverse *** to the flexibility of supramolecular assembly,the CPL properties of supramolecular gels have rich controllability and can be used in various *** this review,we summarized the examples of CPL-active supramolecular gel assembly,and further summarized the assembly environment factors and external ***,the versatility of CPL applications in supramolecular gels is demonstrated,ranging from optical devices,information encryption,biosensing and chemical sensing,and other practical *** conclusion,the study provides insights into the multicultural factors influencing CPL in supramolecular gels,describes their applications in various domains,and presents future perspectives in the field.

关键词： supramolecular gels circularly polarized luminescence self-assembly chirality stimuli-response

Diffusion behavior and distribution regulation of MgO in MgO-bearing pellets

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International Journal of Minerals,Metallurgy and Materials 2016年第9期23卷 1011-1018页

作者： Qiang-jian Gao Yan-song shen Guo Wei Xin Jiang Feng-man shen School of Metallurgy Northeastern University School of Chemical Engineering University of New South Wales

In this paper, the diffusion behavior between MgO and Fe2O3（the main iron oxide in pellets） is investigated using a diffusion couple method. In addition, the distribution regulation of MgO in MgO-bearing pellets is analyzed via pelletizing experiments. The results illustrate that MgO is prone to diffuse into Fe2O3 in the form of solid solution; the diffusion rate considered here is 13.64 μm·min^（-1）. Most MgO content distributes in the iron phase instead of the slag phase. The MF phase {（Mg（1-x）Fex）O·Fe2O3, x ≤ 1} is generated in the MgO-bearing pellets. However, the distribution of MgO in the radial direction of the pellets is inconsistent. The solid solution portion of MgO in the MF phase is larger in the outer layer of the pellets than in the inner layer. In this work, the approximate chemical composition of the MF phase in the outer layer of the pellets is {（Mg（0.35-0.77）·Fe（0.65-0.23）） O·Fe2O3} and in the inner layer is {（Mg（0.13-0.45）·Fe（0.87-0.55））O·Fe2O3}.

关键词： magnesia iron oxide ore pellets diffusion distribution

Fabrication and Magnetic Property of One-dimensional SrTiO_3/SrFe_(12)O_(19) Composite Nanofibers by Electrospinning

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Journal of Materials Science & Technology 2011年第11期27卷 996-1000页

作者： Qingrong Liang Xiangqian shen Fuzhan song Mingquan Liu School of Material Science and Engineering Jiangsu University Zhenjiang 212013 China

The composite nanofibers of SrTiO3/SrFel2O19 with a molar ratio of 1：1 and diameter about 120 nm were prepared by electrospinning. Effects of calcination temperature on the formation, crystallite size, morphology and magnetic property were studied by infrared spectroscopy, X-ray diffraction, scanning electron microscopy and vibrating sample magnetometer. The binary phase of strontium ferrite and titanate was formed after being calcined at 900℃ for 2 h and the composite nanofibers were fabricated from nanograins of SrTiO3 about 24 nm and SrFel2O19 around 33 nm. The crystallite sizes for the nanofibers increase with increasing calcination temperature and the addition of SrTiO3 has an obvious suppression effect on SrFel2O19 grain growth. The specific saturation magnetization and remanence tend to increase with the crystallite size. With increasing calcination temperature from 900 to 1050℃, the coercivity increases initially, achieving a maximum value of 520.2 kA.m^-1 at 950℃, and then shows a reduction tendency.

关键词： Composite nanofibers Strontium ferrite Strontium titanate Electrospinning Magnetic property

GO molecular function coding based protein subcellular localization prediction

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Chinese Science Bulletin 2007年第16期52卷 2240-2245页

作者： shen JinCheng song Zhang SUN ZhiRong MOE Key Laboratory of Bioinformatics/Department of Biology Tsinghua University Beijing 100084 China

Subcellular localization is an important feature of proteins which is closely correlated to their function. In this work,we tried to develop a new coding method of using those location predictive molecular function terms of protein as the input for the prediction of subcellular localization. Combined with the amino acid pair composition of the sequence,this coding system is proved to be efficient for support vector machine (SVM) and to have satisfied performance when tested on the RH dataset. Meanwhile,the model also shows robustness against N-terminal uncertainties in sequences.

关键词：蛋白质细胞内定位氨基酸支持向量机

Tracking Control of Hypersonic Vehicle with Input Saturation Based on Adaptive Back-Stepping Method 36

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Tracking Control of Hypersonic Vehicle with Input Saturation...

Nanomedicine-mediated ubiquitination inhibition boosts antitumor immune response via activation of dendritic cells

第36届中国控制会议

作者： SUN Jing-guang song shen-min Department of Control Science and Engineering Harbin Institute of Technology

ISBN: (纸本)9781538629185

This thesis studies the tracking control problem of hypersonic vehicle subject to model parameter uncertainties, external disturbance and input saturation. Firstly, the feedback linearization for longitudinal model of hypersonic vehicle is reasonably decomposed into subsystems that include velocity and altitude subsystem. Secondly, the auxiliary system is introduced to design the anti-saturation adaptive back-stepping controller using dynamic surface control（DSC） technique and compensating signals, which not only avoids the explosion of complexity in the back-stepping design, but also removes the effect of the error caused by the first-order filter. Finally, Lyapunov theory is used to prove the stability of the designed controller strictly, and the numerical simulation of the longitudinal model of the hypersonic vehicle is carried out, which further confirms the robustness and effectiveness of the designed control scheme.

关键词： hypersonic vehicle back-stepping method tracking control input saturation

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Nano Research 2021年第11期14卷 3900-3906页

作者： Jilong Wang Mengwen Huang Senbiao Chen Yingli Luo song shen Xiaojiao Du School of Biomedical Sciences and Engineering South China University of TechnologyGuangzhou International CampusGuangzhou510006China Institutes for Life Sciences School of MedicineSouth China University of TechnologyGuangzhou510006China National Engineering Research Center for Tissue Restoration and Reconstruction South China University of TechnologyGuangzhou510006China Key Laboratory of Biomedical Engineering of Guangdong Province South China University of TechnologyGuangzhou510006China Bioland Laboratory Guangzhou Regenerative Medicine and Health Guangdong LaboratoryGuangzhou510005China Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education South China University of TechnologyGuangzhou510006China Innovation Center for Tissue Restoration and Reconstruction South China University of TechnologyGuangzhou510006China

Tumor immunotherapy as a promising method for tumor treatment received tremendous attention. However, the problem of low clinical response rate still needs to be solved, especially in the poorly immunogenic tumors. The enhancement of tumor antigens presentation can effectively activate dendritic cells (DCs) and improve the tumor immunotherapy. In this work, TAK-243 as an inhibitor of the ubiquitin activating enzyme (UAE), was fabricated into cationic lipid-assisted nanoparticle (CLANTAK-243). The obtained CLANTAK-243 could act as an effective tumor immunotherapy enhancer to promote the maturation of DCs as well as antigen presentation, which obviously stimulated the T cells activation and proliferation. Such CLANTAK-243 injected intravenously could well trigger immune response to tumor cells in vivo. Importantly, mice treated with CLANTAK-243 could obtain a long immune memory effect to protect themselves from re-challenged tumor cells. Therefore, this work presented an effective immunotherapy strategy for poorly immunogenic tumor.

关键词： drug delivery cancer immunotherapy ubiquitin activating enzyme(UAE) inhibitor antigen presentation dendritic cell(DC)maturation

Investigation of combined degrader for proton facility based on BDSIM/FLUKA Monte Carlo methods

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Nuclear Science and Techniques 2022年第2期33卷 30-39页

作者： Man-Fen Han Jin-Xing Zheng Xian-Hu Zeng Jun-song shen Hefei Institutes of Physical Science Chinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China

The significant advantage of proton therapy over other particle-based techniques is in the unique physical characteristics of the Bragg *** can achieve a highly conformal dose distribution and maximize the probability of tumor control by varying the irradiation *** proton facilities use cyclotrons for fixed energy beam extraction and are equipped with degrader and collimator systems for energy modulation and emittance ***,interactions between charged particles and degrader materials inevitably cause beam loss and divergence and deteriorate beam performance,which present great challenges for downstream transport and clinical *** this work,we investigate a method of energy reduction by combining boron carbide and graphite in a degrader to obtain greater beam transmission at lower *** results demonstrate that the beam size and emittance at the exit of the combined degrader diverge less than those of multi-wedge one in the energy range of 70-160 ***,the transmission efficiency after the first dipole also shows improvements of 36.26%at 70 MeV and 70.55%at 110 *** a component with a high activity level,the degrader causes additional ambient radiation during *** induced radiation even remains several hours after system *** of material activation and induced radiation based on 1 h irradiation with a 400 nA beam current shows that the combined degrader has a definite advantage in shielding despite producing more secondary *** radioactivity and average ambient dose equivalent are reduced by 50%compared with the multiwedge degrader at the important cooling time of 1 *** 12 h and 24 h of cooling,the radiation levels of degraders decrease slightly due to the presence of long half-life residual *** average dose generated from the multi-wedge degrader is still 1.25 times higher than that of the combined one.

关键词： Proton therapy Degrader Boron carbide Transmission efficiency Radionuclide Ambient dose equivalent

Automatic microseismic events detection using morphological multiscale top-hat transformation

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Petroleum Science 2022年第5期19卷 2027-2045页

作者： Guo-Jun Shang Wei-Lin Huang Li-Kun Yuan Jin-song shen Fei Gao Li-song Zhao State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum-BeijingBeijing102249China Department of Automation China University of Petroleum-BeijingBeijing102249China Hebei Coal Research Institute Company Ltd. Jizhong Energy GroupXingtaiHebei 054000China

The occurrence of microseismic is not random but is related to the physical properties of the underground *** to the low intensity and the influence of noise,microseismic eventually lead to poor signal-to-noise *** proposed a method for automatic detection of microseismic events by adoption of multiscale top-hat *** method is based on the difference between the signal and noise in the multiscale top-hat transform section and achieves the detection on a specific *** microseismic data are decomposed into different scales by multiscale morphology top-hat transformation *** the potential microseismic events could be detected by picking up the peak value in the multiscale top-hat section,and the characteristic profile obtains the start point with a specific threshold ***,the synthetic data experiences demonstrate the advantages of this method under strong and weak noisy conditions,and the filed data example also shows its reliability and adaptability.

关键词： Microseismic events detection Multiscale morphology Top-hat transformation

Classification of plant functional types based on the nutrition traits： a case study on alpine meadow community in the Zoigê Plateau

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Journal of Mountain Science 2017年第10期14卷 2003-2012页

作者： shen song-tao ZHANG Shu-jie FAN Min WANG Qing School of Environment and Resource Southwest University of Science and Technology Mianyang 621010 China

The ecological concept of Plant Functional Types（PFTs）, which refers to the assemblage of plants with certain functional traits, has been introduced for the study of plant responses to the environment change and human disturbance. Taking the alpine meadow community in the Zoigê Plateau as a study case, this paper classified PFTs in terms of plant nutrition traits. The sequential results are as follows.（1） The main herbages in the Zoigê Plateau included 16 species in 5 families. Among the five families, Cyperaceae vegetation accounted for 81.37%of herbage area in total, while the remaining 4families occupied less than 20%. As for the species,Kobresia setchwanensis Hand.-Maizz. was dominant,accounting for 48.74% of the total area; while the remaining 51.26% was comprised of Polygonum viviparum L., Anaphalis fiavescens Hand.-Mazz.,Stipa aliena Keng and other species.（2） By using the Principal Component Analysis（PCA）, the assessment of herbages nutrition was carried out based on the comprehensive multi-index evaluation *** viviparum L. had the highest nutritional value score（1.43）, and Stipa aliena Keng had the lowest（-1.40）. Nutritional value of herbage species had a significantly positive correlation with altitude（P＆lt;0.01） in the Zoigê Plateau.（3） Based on the nutritional values, herbages in the Zoigê Plateau could be grouped into 3 nutrition PFTs（high, medium and low） by using the Natural Breaks（Jenks） method.

关键词： Plant functional types Nutritional value Forage resource management the Zoigê Plateau