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2-(2-吡啶)-苯并咪唑Zn(Ⅱ)、Ni(Ⅱ)配合物的合成及其与BSA相互作用研究

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化学研究与应用 2024年第5期36卷 997-1007页

作者：覃姣兰黄如川袁涛姚鹏飞甘永乐百色学院广西城市水环境重点实验室广西百色533000

2-(2-吡啶)-苯并咪唑(2-bd)与Zn(ClO_(4))_(2)·6H_(2)O和Ni(ClO_(4))_(2)·6H_(2)O在无水乙醇溶剂中反应得到[Zn(2-bd)_(3)](ClO_(4))_(2)·(H_(2)O)_(2)(简称:2-bd-Zn)和[Ni(2-bd),](ClO_(4))_(2):(H_(2)O)_(2)(简称:2-bd-Ni),两者均属于三斜晶系,空间群P-1。在生理条件下(pH=7.42),利用荧光光谱研究2-bd、2-bd-Zn和2-bd-Ni与牛血清白蛋白(BSA)相互作用。结果表明,在302K、308K、314K三个温度下,2-bd、2-bd-Zn和2-bd-Ni对BSA的猝灭常数K_(q)>10^(10),结合常数K随温度的升高而下降,表明化合物与BSA结合形成复合物,BSA荧光猝灭属于静态猝灭类型。2-bd-Zn和2-bd-Ni与BSA结合的K(10^(5)~10^(6))大于2-bd的K_(a)(10^(3)),大于许多文献报道的Ka值(10^(3)~10^(4)),表明配合物与BSA结合作用较强。2-bd、2-bd-Zn和2-bd-Ni随着浓度的增加,使BSA的紫外可见光谱出现增色现象,使BSA的荧光光谱和Δλ=60nm同步荧光光谱减色且红移,表明化合物改变BSA的微环境,其中2-bd-Zn的作用最明显。位点竞争实验表明,2-bd、2-bd-Zn和2-bd-Ni与BSA亚结构域ⅡA的位点I结合。计算焓变(ΔH)、熵变(ΔS)和吉布斯自由能变化(ΔG)表明,三者与BSA间的作用力主要是氢键和范德华力(ΔH<0、ΔS<0),结合是自发进行(ΔG<0)。

关键词：苯并咪唑金属配合物牛血清白蛋白光谱研究相互作用

High Efficient Blowing Technique for Large and Medium Converters

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Journal of Iron and Steel Research International 2010年第2期17卷 1-5页

作者： JIANG Xiao-fang YANG Wen-yuan WANG Ming-lin CHEN yuan-ping gan Yong Steelmaking Plant Baoshan Iron and Steel Co Ltd Shanghai 201900 China National EngineeringResearch Center of Continuous Casting Central Iron and Steel Research Institute Beijing 100081 China General Engineer Office Haixin Iron and Steel Co Wenxi 043801 Shanxi China

The high efficient blowing technique includes increasing oxygen supply intensity and optimizing slag forming. The oxygen supply intensity on 300 t converters of No. 1 steelmaking shop at Baosteel reaches 3.83 m^3/（t · min）, and at Taiyuan Steel, Lianyuan Steel, Pingxiang Steel and other steel plants, the oxygen supply intensity on medium converters is in the range of 4.0--4.4m^3/（t · min）. The productivity of converter can be increased by 8% -- 15% with adopting this technique. The whole technique, including design and manufacture of lance nozzle with reasonable pacnolontenue of outlets, technique of oxygen supply and slag forming, has been developed by CISRI to meet the need of technique transfer.

关键词： converter oxygen supply intensity oxygen blowing time efficient dephosphorization

结合Transformer与生成对抗网络的水下图像增强算法

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红外技术 2024年第9期46卷 975-983页

作者：袁红春张波程心上海海洋大学信息学院上海201306 上海海洋大学海洋生物资源与管理学院上海201306

由于水下环境的多样性和光在水中受到的散射及选择性吸收作用,采集到的水下图像通常会产生严重的质量退化问题,如颜色偏差、清晰度低和亮度低等,为解决以上问题,本文提出了一种基于Transformer和生成对抗网络的水下图像增强算法。以生... 详细信息

由于水下环境的多样性和光在水中受到的散射及选择性吸收作用,采集到的水下图像通常会产生严重的质量退化问题,如颜色偏差、清晰度低和亮度低等,为解决以上问题,本文提出了一种基于Transformer和生成对抗网络的水下图像增强算法。以生成对抗网络为基础架构,结合编码解码结构、基于空间自注意力机制的全局特征建模Transformer模块和通道级多尺度特征融合Transformer模块构建了Tgan(generative adversarial network with transformer)网络增强模型,重点关注水下图像衰减更严重的颜色通道和空间区域,有效增强了图像细节并解决了颜色偏差问题。此外,设计了一种结合RGB和LAB颜色空间的多项损失函数,约束网络增强模型的对抗训练。实验结果表明,与CLAHE(contrast limited adaptive histogram equalization)、UDCP(underwater dark channel prior)、UWCNN(underwater based on convolutional neural network)、FUnIE-gan(fast underwater image enhancement for improved visual perception)等典型水下图像增强算法相比,所提算法增强后的水下图像在清晰度、细节纹理和色彩表现等方面都有所提升,客观评价指标如峰值信噪比、结构相似性和水下图像质量度量的平均值分别提升了5.8%、1.8%和3.6%,有效地提升了水下图像的视觉感知效果。

关键词：图像处理水下图像增强 Transformer 生成对抗网络多项损失函数

Graphene surface plasmon polaritons transport on curved substrates

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Photonics Research 2015年第6期3卷 300-307页

作者： Ting-Hui Xiao Lin gan Zhi-yuan Li Laboratory of Optical Physics Institute of Physics Chinese Academy of Sciences

We theoretically investigate the transport property of graphene surface plasmon polaritons(GSPPs) on curved graphene substrates. The dispersion relationship, propagation length, and field confinement are calculated by an analytical method and compared with those on planar substrates. Based on our theory, the bend of graphene nearly does not affect the property of GSPPs except for an extremely small shift to the lower frequency for the same effective mode index. The field distributions and the eigenfrequencies of GSPPs on planar and cylindrical substrates are calculated by the finite element method, which validates our theoretical analysis. Moreover, three types of graphene-guided optical interconnections of GSPPs, namely, planar to curved graphene film, curved to planar graphene film, and curved to curved graphene film, are proposed and examined in detail. The theoretical results show that the GSPPs propagation on curved graphene substrates and interconnections will not induce any additional losses if the phase-matching condition is satisfied. Additionally, the extreme tiny size of curved graphene for interconnection at a certain spectra range is predicted by our theory and validated by the simulation of 90° turning of GSPPs. The bending effect on the property of GSPPs is systematically analyzed and identified. Our studies would be helpful to instruct design of plasmonic devices involving curved GSPPs, such as nanophotoniccircuits, flexible plasmonic, and biocompatible devices.

关键词： Graphene surface plasmon polaritons transport on curved substrates

Robust Multiparty Quantum Secret Key Sharing Over Two Collective-Noise Channels via Three-Photon Mixed States

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Communications in Theoretical Physics 2006年第4X期46卷 607-609页

作者： WANG Zhang-Yin yuan Hao GAO gan Shou-Hua School of Physics and Material Science Anhui University Hefei 230039 China

We present a robust （n, n）-threshold scheme for multiparty quantum secret sharing of key over two collectivenoise channels （i.e., the collective dephasing channel and the collective rotating channel） via three-photon mixed states, In our scheme, only if all the sharers collaborate together can they establish a joint key with the message sender and extract the secret message from the sender＇s encrypted message. This scheme can be implemented using only a Bell singlet, a one-qubit state and polarization identification of single photon, so it is completely feasible according to the present-day technique.

关键词： multiparty quantum secret key sharing collective-noise channel

Biodegradable Microspheres with Poly(N-isopropylacrylamide) Enriched Surface: Thermo-responsibility, Biodegradation and Drug Release

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Chinese Journal of Polymer Science 2015年第11期33卷 1598-1605页

作者： Yin yuan 孙培健 Xu-dong Shi Zhi-hua gan 王佛松 CAS Key Laboratory of Engineering Plastics Institute of Chemistry Chinese Academy of Sciences the Key Laboratory of Tobacco Chemistry Zhengzhou Tobacco Research Institute China National Tobacco Corporation State Key Laboratory of Organic-inorganic Composites Beijing Laboratory of Biomedical MaterialsCollege of Life Sciences and Technology

Microspheres with thermo-responsible surface were fabricated by PCL-b-PEO-b-PNIPAM triblock copolymers. Thermo-responsible morphological changes of PCL-b-PEO-b-PNIPAM microspheres immersed in aqueous solution at temperatures above the LCST（e.g. 37 ℃） were observed from porous surface structure to compact surface layer. Enzymatic degradation and in vitro drug release results showed that the thermo-responsible surface layer greatly influenced the degradation of microspheres as well as the drug release behavior from microspheres. With the copolymerization of PNIPAM block into PCL-b-PEO copolymers, the drug release could be well regulated by changing temperatures and microspheres composition, which revealed the great potentials of microspheres with thermo-responsible surface for controlled drug release.

关键词： Microspheres Poly(N-isopropylacrylamide) Thermo-sensitive Biodegradation

A Novel PoW Scheme Implemented by Probabilistic Signature for Blockchain

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Computer Systems Science & Engineering 2021年第11期39卷 265-274页

作者： Bo Mi yuan Weng Darong Huang Yang Liu Yuqing gan Institute of Information Science and Engineering Chongqing Jiaotong UniversityChongqing400074China Electrical and Electronics Engineering Department The University of SheffieldSheffieldS102TTUnited Kingdom

PoW(Proof of Work)plays a significant role in most blockchain systems to grant an accounting right over decentralized participants and ensure tamper *** hash functions are generally exploited for PoW due to their merits on summering,anti-collision,and irreversibility,they cannot certify that the bookkeeper is exactly the ***,such insistence may lead to abuse or even embezzlement of computing power for the benefit of malicious *** preserve the functionality of PoW but also bind the miners’signing keys with their works,we build a post-quantum PoW scheme by changing the approximate closest vector norm for probabilistic *** from the schemes based on hash functions,our scheme takes signing as the proof of work where signature verification is just the evidence of block *** also presented a method to adjust the difficulty of signing by modifying the probability of generating a correct *** performance of our scheme is also analyzed theoretically and experimentally,which implies its practicability and advantages.

关键词： Proof of work NTRUSign Burr distribution blockchain

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2型糖尿病肾脏病与TMAO的相关性研究

中国临床药理学与治疗学 2024年第6期29卷 661-670页

作者：王梦珂甘超袁玥邹婧怡王珍李淑云吕海宏兰州大学第一临床医学院甘肃兰州730000 兰州大学第一医院检验科甘肃兰州730000 兰州大学第一医院内分泌科甘肃兰州730000

目的:探讨氧化三甲胺(trimethylamine-N-oxide,TMAO)与2型糖尿病肾脏病(diabetic kid-neydisease,DKD)的相关性,为2型糖尿病肾脏病的临床早期诊断提供新的思路。方法:选取2023年1月至2023年5月兰州大学第一医院内分泌科住院的2型糖尿病... 详细信息

目的:探讨氧化三甲胺(trimethylamine-N-oxide,TMAO)与2型糖尿病肾脏病(diabetic kid-neydisease,DKD)的相关性,为2型糖尿病肾脏病的临床早期诊断提供新的思路。方法:选取2023年1月至2023年5月兰州大学第一医院内分泌科住院的2型糖尿病患者246例,将其分为糖尿病肾脏病组(DKD组)及非糖尿病肾脏病组(NDKD组),根据尿白蛋白/肌酐比(UACR)分为A1、A2、A3亚组,根据肾小球滤过率(eGFR)分为G1、G2、G3、G4-5亚组,并依据肾脏病改善全球预后组织(KDIGO)指南进行糖尿病肾脏病进展风险评估(低、中、高或极高风险)。收集患者的临床资料,通过酶联免疫法检测血TMAO水平,通过SPSS25.0软件进行统计学分析。结果:T2DM患者TMAO水平与UACR呈正相关(r=0.515,P<0.001),与eGFR呈负相关(r=-0.409,P<0.001)。高水平TMAO是DKD的独立危险因素,TMAO预测DKD最佳切点为5.37µmol/L,曲线下面积为0.745,特异性为58.3%,敏感性为83.8%。结论:TMAO与DKD发生发展密切相关,其对DKD具有一定的临床预测价值,TMAO可能成为糖尿病肾脏病早期诊断及治疗的潜在靶点。

关键词：氧化三甲胺 2型糖尿病糖尿病肾病肠道菌群代谢产物尿微量白蛋白

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Large eddy simulation of cloud cavitation and wake vortex cavitation around a trailing-truncated hydrofoil

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Journal of Hydrodynamics 2022年第5期34卷 893-903页

作者： Ting-yun Yin Giorgio Pavesi Ji Pei Shou-qi yuan Xing-cheng gan National Research Center of Pumps Jiangsu UniversityZhenjiang212013China Department of Industrial Engineering University of PaduaPaduaItaly Turbomachinery and Energy Systems Group University of PaduaPaduaItaly

The cavitation has received considerable attention for decades because of its negative influence on the performance and the safety of the hydraulic *** this study,a large eddy simulation is carried out to numerically investigate the unsteady cavitating flow around a trailing-truncated NACA 0009 hydrofoil for determining the underlying physical *** types of cavitation morphologies are identified:The large-scale bubble cluster and the von Kármán vortex cavity,named as the cloud cavitation and the wake vortex cavitation,*** is shown that the velocity profiles obtained over the hydrofoil suction surface are in good agreement with the experimental data,indicating the accuracy of the current *** dynamic evolution of the sheet/cloud cavity is also well reproduced,covering the sheet cavity breakup,the sheet/cloud transformation,and the collapse of the cloudy bubble *** wake-vortex cavitation is caused by the blunt geometry at the hydrofoil trailing edge,where pairs of vortex cavities are *** the cloud and vortex cavities significantly affect the lift oscillation,which makes it difficult to decompose the *** fundamental shedding mechanisms of the wake vortex cavitation are discussed based on the finite-time Lyapunov exponent ***,the suction-side bubble grows and squeezes the giant pressure bubble away from the trailing *** the pressure bubble detaches,a new counterclockwise vortex or a new bubble appears at the pressure side,thus lifting the ridge towards the suction trailing edge and generating a strong vortex eye that pinches off the trailing portion of the suction-side bubble.

关键词： Cloud cavitation wake vortex cavitation trailing-truncated hydrofoil large eddy simulation