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Initial nucleation of amorphous Si–B–C–N ceramics derived from polymer-precursors

Journal of Materials Science & Technology 2019年第12期35卷 2851-2858页

作者： ling-yan Li Hui gu Vesna Srot Peter van Aken Joachim Bill Materials Genome Institute School of Materials Science and EngineeringShanghai University99 Shangda RoadShanghai200444China Stuttgart Center for Electron Microscopy Max-Planck-lnstitute for Solid-State ResearchHeisen bergs trasse 370569StuttgartGermany Institute of Materials Science University of StuttgartHeisenbergstrasse 570569StuttgartGermany

Nucleation behavior of amorphous Si–B–C–N ceramics derived from boron-modified polyvinylsilazane procusors was systematically investigated by transmission electron microscopy(TEM) combined with spatially-resolved electron energy-loss spectroscopy(EELS) analysis. The ceramics were pyrolyzed at1000℃ followed by further annealing in N2, and SiC nano-crystallites start to emerge at 1200℃ and dominate at 1500℃. Observed by high-angle annular dark-field imaging, bright and dark clusters were revealed as universal nano-structured features in ceramic matrices before and after nucleation, and the growth of cluster size saturated before reaching 5 nm at 1400℃. EELS analysis demonstrated the gradual development of bonding structures successively into SiC, graphetic BNCxand Si3N4 phases, as well as a constant presence of unexpected oxygen in the matrices. Furthermore, EELS profiling revealed the bright SiC clusters and less bright Si3N4-like clusters at 1200–1400℃. Since the amorphous matrix has already phase separated into SiCN and carbon clusters, another phase separation of SiCN into SiC and Si3N4-like clusters might occur by annealing to accompany their nucleation and growth, albeit one crystallized and another remained in amorphous structure. Hinderance of the cluster growth and further crystallization was owing to the formation of BNCxlayers that developed between SiC and Si3N4-like clusters as well as from the excessive oxygen to form the stable SiO2.

关键词： Precursor derived ceramics Si–B–C–N Nucleation High-angle annular dark-field imaging Electron energy-loss spectroscopy

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Clickable,Oxidation-Responsive and Enzyme-Degradable Polypeptide:Synthesis,Characterization and Side Chain Modification

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Chinese Journal of Polymer Science 2022年第11期40卷 1360-1368页

作者： yan-Zhi Lu An-Qi gu Tian-Lun Shen Ji-Hong Sun Jun ling Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China Department of Radiology Sir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhou310016China

Modifications at polypeptide side chains have been found to affect conformational and properties,which is a vital strategy to prepare functional *** contribution describes the synthesis of homo and co-polypeptides containing unsaturated bonds and thioether moieties,poly(S-allylcysteine)(PAC).The pendant vinyl groups provide an active binding site which are able to be further modified with cysteine by thiol-ene click *** sulfoxide from thioether oxidation bestows the polypeptide water solubility and enzymatic catalytic *** selfassembly micelles of PEG-b-PAC are ruptured along with oxidation to release the Nile red ***,poly(S-allyl-cysteine sulfoxide),***,is the oxidation product of PAC which undergoes side chain cleavage catalyzed by alliinase *** polypeptides are biocompatible as confirmed by cell viability assays and may find applications in drug delivery,biosensing and nanoreactor.

关键词： Polypeptides Ring-opening polymerization Stimuli-responsive polymers N-carboxy anhydrides N-phenoxycarbonylα-amino acids

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Liposomes as versatile agents for the management of traumatic and nontraumatic central nervous system disorders:drug stability,targeting efficiency,and safety

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Neural Regeneration Research 2025年第7期20卷 1883-1899页

作者： Mingyu Zhang Chunyu Xiang Renrui Niu Xiaodong He Wenqi Luo Wanguo Liu Rui gu Department of Orthopedic Surgery China-Japan Union Hospital of Jilin UniversityChangchunJilin ProvinceChina

Various nanoparticle-based drug delivery systems for the treatment of neurological disorders have been widely ***,their inability to cross the blood–brain barrier hampers the clinical translation of these therapeutic *** are nanoparticles composed of lipid bilayers,which can effectively encapsulate drugs and improve drug delivery across the blood–brain barrier and into brain tissue through their targeting and ***,they can potentially treat traumatic and nontraumatic central nervous system *** this review,we outlined the common properties and preparation methods of liposomes,including thin-film hydration,reverse-phase evaporation,solvent injection techniques,detergent removal methods,and microfluidics ***,we comprehensively discussed the current applications of liposomes in central nervous system diseases,such as Alzheimer's disease,Parkinson's disease,Huntington's disease,amyotrophic lateral sclerosis,traumatic brain injury,spinal cord injury,and brain *** studies related to liposomes are still in the laboratory stage and have not yet entered clinical ***,their application as drug delivery systems in clinical practice faces challenges such as drug stability,targeting efficiency,and ***,we proposed development strategies related to liposomes to further promote their development in neurological disease research.

关键词： Alzheimer's disease amyotrophic lateral sclerosis brain tumors central nervous system Huntington's disease liposome drug delivery neurological disorders Parkinson's disease spinal cord injury traumatic brain injury

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Coherent Control of Photon Transmission in a Coupled-Resonator Waveguide Embedded in a Semiconductor Quantum Dot

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Chinese Physics Letters 2012年第10期29卷 58-61页

作者： gu ling-Ming School of Electrical Engineering&Information Anhui University of TechnologyMaanshan 243002

We theoretically investigate the single photon transport in a coupled resonator waveguide embedded in a semiconductor quantum dot with a V-type *** transmission and reflection amplitudes are obtained by using a discrete coordinates *** is shown that the photon transport properties can be controlled by the energy detuning between the two excited states of the V-type system,and the coupling strength between the photon and the V-type *** also compare the single photon transport properties in the waveguide with sinusoidal and linear dispersion relations.

关键词： waveguide tuning resonator

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Clinical application of simultaneous detection of cystatin C,cathepsin S,and IL-1 in classification of coronary artery disease

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The Journal of Biomedical Research 2017年第4期31卷 315-320页

作者： ling yan Shuang Ding Bing gu Ping Ma Medical Technology Institute of Xuzhou Medical College Xuzhou Jiangsu 221004 China Department of Laboratory Medicine the Affiliated Hospital of Xuzhou Medical College Xuzhou Jiangsu 221002 China

Cystatin C,cathepsin S,and IL-1 are three important biomarkers of *** studies emphasized the relationship between individual biomarkers in coronary artery disease（CAD） patients and severity of atherosclerostic lesions of the coronary arteries,while combined cystatin C,cathepsin S,and IL-1 have not been reported for clinical classification of *** aimed to establish a link between cystatin C,cathepsin S,IL-1 and CAD in this cohort *** 112 subjects were enrolled and divided into the stable angina pectoris group,the unstable angina pectoris group and the acute myocardial infarction（AMI） groups,and 50 healthy adults served as *** levels of the three biomarkers were detected by *** results showed that serum level of cystatin C（mg/L） was higher in CAD patients compared with those in the healthy controls（AMI *** angina pectoris *** angina pectoris ***：1.27±0.18 vs.1.09±0.19 vs.0.91±0.05 vs.0.78±0.07,all P〈0.01）.Cathepsin S（ng/mL） was also significantly different among the groups（AMI *** angina pectoris *** angina pectoris ***：67.30±8.36 vs.56.90±7.16 vs.49.8±2.72 vs.67.30±8.36,all P〈0.01）.IL-1（pg/mL） was significantly different among the groups as well（AMI *** angina pectoris *** angina pectoris ***：2.96±0.57 vs.2.46±0.24 vs.2.28±0.09 vs.2.02±0.13,all P〈0.01）.Spearman＇s correlation test revealed positive correlation between cystatin C,cathepsin S,IL-1 and Gensini score（r=0.451,0.491,0.397,respectively）.It is suggested that simultaneous detection of cystatin C,cathepsin S,and IL-1 in serum may be useful in clinical classification and assessment of severity of CAD.

关键词： cystatin C cathepsin S IL-1 coronary artery disease

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Significance of achieving carbon neutrality by 2060 on China's energy transition pathway: A multi-model comparison analysis

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Advances in Climate Change Research 2023年第1期14卷 32-42页

作者： ling-Si KONG Xian-Chun TAN Bai-He gu Hong-Shuo yan Institutes of Science and Development Chinese Academy of SciencesBeijing 100190China School of Public Policy and Management University of Chinese Academy of SciencesBeijing 100049China Center for Carbon Neutrality Strategy Institutes of Science and DevelopmentChinese Academy of SciencesBeijing 100190China

China has proposed to achieve carbon neutrality by *** previous studies have assessed net-zero emissions pathways in China,the diversity observed in these studies in terms of model construction and parameter setting has led to inconsistent conclusions on some key issues,such as energy *** study employs a multi-model comparison method to examine the significance of China's carbon neutrality target on its energy systems by assessing 67 carbon neutrality scenarios in China that are collected from the ADVANCE database,and identifying the differences between energy transition pathways under BEF60 scenarios(*** realising carbon neutrality by 2060)and AFT60 scenarios(*** realising carbon neutrality after 2060).Results show that China needs a larger deployment of low-carbon electricity,a higher electrification rate and more carbon sequestration amount under BEF60 scenarios than those under AFT60 ***,the magnitude of the difference between the two categories of scenarios varies significantly in terms of different outcome *** that present significant disparities include the deployment scale of solar power(increasing by 160%),the electrification rate of the building sector(increasing by 27%)and the carbon sequestration amount of biomass power with carbon capture and storage(increasing by 380%).In addition,this study selects six indicators to present the technological and economic characteristics of various energy systems of China at the point of net-zero *** the relationships between characteristics,this research identifies the common features among various net-zero energy systems.A great share of non-biomass renewable power generation is always associated with a relatively high per capita energy use,implying that high renewables penetration may relax restrictions on energy consumption,which should be addressed for China when making efforts to promote energy transition.

关键词： Carbon neutrality Multi-model comparison analysis Energy transition Technology option Common feature

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面向工业物联网的策略隐藏属性基加密方案

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现代电子技术 2025年第1期48卷 90-96页

作者：尹建标张言史培中古春生江苏理工学院计算机工程学院江苏常州213001

针对工业物联网中的生产和监管数据易泄露与数据获取中断的问题,提出支持策略隐藏的属性基加密方案。将属性信息分为属性名和属性值进行方案构造,属性值在构造过程中并未暴露并且上传到云服务器的访问策略仅由属性名构成,工业物联网设... 详细信息

针对工业物联网中的生产和监管数据易泄露与数据获取中断的问题,提出支持策略隐藏的属性基加密方案。将属性信息分为属性名和属性值进行方案构造,属性值在构造过程中并未暴露并且上传到云服务器的访问策略仅由属性名构成,工业物联网设备在获取生产信息时不会完整的访问策略,防止了不法分子对设备信息盗取进而导致访问策略及生产信息的泄露。同时,授权多个半可信云服务器,当某个半可信云服务器不能正常工作时可快速根据服务器密钥更新用户私钥,使得其他半可信云服务器接替其工作,保证物联网设备读取数据的连续性。此外,引入属性认证,在撤销过程中无需重更新密文,适用于产生大量数据的物联网环境的撤销。经过安全性分析和性能分析,该方案能抵抗选择明文攻击,且系统初始化、用户密钥生成、加密、解密都具有较高的运行效率。

关键词：工业物联网数据安全策略隐藏单点故障属性认证属性撤销

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Entanglement transfer from two-mode squeezed vacuum light to spatially separated mechanical oscillators via dissipative optomechanical coupling

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Science China(Physics,Mechanics & Astronomy) 2015年第5期58卷 52-59页

作者： yan yan gu WenJu LI GaoXiang Department of Physics Huazhong Normal University Institute of Quantum Optics and Information Photonics School of Physics and Optoelectronic Engineering Yangtze University

In this paper, we propose a scheme to generate an entangled state between two spatially separated movable mirrors by injecting the two-mode squeezed optical reservoir to the dissipative optomechanics, in which the movable mirrors can modulate the linewidth of the cavity modes. When the coupling between the mirrors and the corresponding cavity modes is weak, the two driven cavity fields can respectively behave as the squeezed-vacuum reservoir for the two movable mirrors by utilizing the effect of completely destructive interference of quantum noise. Thus the mechanical modes are prepared in a two-mode squeezed vacuum state. Moreover,when the coupling between the two mirrors and the cavities modes is strong, the entanglement between the two movable mirrors decreases because photonic excitation can preclude the completely destructive interference of quantum noise, but the movable mirrors are still entangled.

关键词： EPR mechanical entanglement double dissipative optomechanics efficient transfer of quantum correlations

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Flow around three rectangular cylinders arranged in connected and separated Y-shape

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Acta Mechanica Sinica 2005年第4期21卷 336-341页

作者： Zhifu gu yan Li Department of Mechanics and Engineering Science Peking UniversityBeijing 100871 China

Characteristics of cross flow around three rectangular cylinders with two aspect ratios of breadth to width arranged in connected and separated Y-shape at various angles of incident flow were studied by means of force measurement in a wind tunnel. Flow visualizations with smoke-wire technique for typical cases were also given. Different types of flow patterns were formed for individual models at different angles of incident flow. From the results of fluctuating velocity measurement in the wake, features of vibration were determined. It shows that as the wind blows along the lines of one limb or rectangular cylinder of the model, oscillation is weak, whereas when the wind blows along the bisector lines of two limbs or cylinders, strong vibration is observed. It is associated with the regular vortex shedding.

关键词： Rectangular cylinders. Vortex-induced vibration Flow visualization Y-shape

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Assessment tools of nursing work environment in magnet hospitals: A review

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International Journal of Nursing Sciences 2014年第4期1卷 437-440页

作者： Li-yan gu ling-Juan Zhang Nursing Department Changhai Hospital Affiliated to Second Military Medical UniversityShanghaiChina

In the 1990s,the American Nurses Association established a certification program called the Magnet Recognition Program through the American Nurses Credentialing Centre(ANCC)to complement the quality care provided to patients by *** the program was recognised,hospitals were identified as magnet hospitals[1].Some studies show that magnet hospitals provide a healthier working environment for nurses,accompanied by higher nurse satisfaction and better patient prognosis than non-magnet hospitals[2e5].The nursing work environment is the sum of various elements that directly or indirectly affect the patient care system[6].Improving the nursing work environment is a focal point and challenge for nursing ***,administrators in magnet hospitals usually apply a variety of assessment tools for effective evaluation of the nursing work environment to maintain and improve the health of the environment.

关键词： Evaluation studies Magnet hospitals Nursing work environment Literature review

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