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Synthesis and Self-assembling of Coumarin-based Low-molecular Weight Organogelators

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Chemical Research in Chinese Universities 2009年第2期25卷 178-182页

作者： CHEN Guo-jun xuE Peng-chong LU Ran SONG Dong-po BAO Chun-yan xu Ting-hua zhao Ying-ying College of Chemistry Jilin University Changchun 130012 P. R. China

Four coumarin derivatives（4a-4d） with different alkoxy chains were synthesized. It was found that compound 4d showed a better gelation ability than the other compounds, for example, it could self-assemble into organogels in various organic fluids via ultrasound treatment or heating-cooling process, whereas compound 4c could only gel in a few mixed solvents and compounds 4a, 4b could not form organogel. The results from fluorescent and FT-IR spectra indicate that π-π interaction had an effect on the formation of the organogels of compound 4d besides H-bonding and van der Waals interaction, which were the driving forces for the self-assembling of compound 4c in gel state. The gel of compound 4d in toluene could emit strong fluorescence under UV irradiation and the [2＋2] cyclo-addition was suggested by ^1H NMR and fluorescence spectroscopy. This light-sensitive organogel might find application in optical materials.

关键词： Coumarin Organogelator Self-assembling [2+2] Cyclo-addition

Investigation of all-optical regeneration based on self-phase modulation in microstructured fibers

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Optoelectronics Letters 2007年第1期3卷 18-21页

作者： WEI yan-fen xu Yong-zhao Zhang Xia HUANG Yong-qing REN Xiao-min Optical Communication Center Beijing University of Posts and Telecommunications Beijing 100876 China

All-optical regeneration based on self-phase modulation in microstructured fibers is studied. The effects of pulse peak power into the fiber, pulse width and filter parameters on the performance of the regenerator are investigated. The effects of normal dispersion and anomalous dispersion of the microstructured fiber on optical regeneration are compared. The nu- merical results show that optical regeneration can be achieved by using microstructured fibers with normal dispersion or anomalous dispersion, but the normal dispersion decreases the oscillatory structure in the broadened spectra and obtain a better regenerator transfer function. In order to achieve optical regeneration, the input peak power into the microstructured fiber and the filter parameters need to meet certain requirements. By optimizing those parameters, a better regeneration result can be obtained.

关键词：微结构光纤全光再生自相位调制滤波器参数

A novel tissue engineered nerve graft constructed with autologous vein and nerve microtissue repairs a longsegment sciatic nerve defect

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Neural Regeneration Research 2021年第1期16卷 143-149页

作者： Jing Wang Ya-Qiong Zhu Yu Wang Hong-Guang xu Wen-Jing xu Yue-Xiang Wang Xiao-Qing Cheng Qi Quan Yong-Qiang Hu Chang-Feng Lu yan-xu zhao Wen Jiang Chen Liu Liang Xiao Wei Lu Chen Zhu Ai-Yuan Wang Spine Research Center of Wannan Medical College Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution(Wannan Medical College)Department of Spine SurgeryYijishan HospitalThe First Affiliated Hospital of Wannan Medical CollegeWuhuAnhui ProvinceChina Department of Ultrasound Chinese PLA General HospitalBeijingChina Department of Orthopedic Surgery Key Laboratory of Musculoskeletal Trauma&War Injuries PLABeijing Key Lab of Regenerative Medicine in OrthopedicsChinese PLA General HospitalBeijingChina Medical College of Nankai University TianjinChina The Neural Regeneration Co-Innovation Center of Jiangsu Province NantongJiangsu ProvinceChina Department of Anesthesiology the Second Affiliated Hospital of Inner Mongolia Medical UniversityHuhhotInner Mongolia Autonomous RegionChina Department of Orthopedic Surgery Yan’an University Affiliated HospitalYan’anShaanxi ProvinceChina Department of Orthopedic Surgery the First Affiliated Hospital of Medical CollegeShihezi UniversityShiheziXinjiang Uygur Autonomous RegionChina Department of Orthopedic Surgery The First Peoples’Hospital of Yunnan ProvinceKunmingYunnan ProvinceChina Department of Orthopedic Surgery Anhui Provincial HospitalThe First Affiliated Hospital of University of Science and Technology of ChinaHeifeiAnhui ProvinceChina

Veins are easy to obtain,have low immunogenicity,and induce a relatively weak inflammatory ***,veins have the potential to be used as conduits for nerve ***,because of the presence of venous valves and the great elasticity of the venous wall,the vein is not conducive to nerve *** this study,a novel tissue engineered nerve graft was constructed by combining normal dissected nerve microtissue with an autologous vein graft for repairing 10-mm peripheral nerve defects in *** with rats given the vein graft alone,rats given the tissue engineered nerve graft had an improved sciatic static index,and a higher amplitude and shorter latency of compound muscle action ***,rats implanted with the microtissue graft had a higher density and thickness of myelinated nerve fibers and reduced gastrocnemius muscle atrophy compared with rats implanted with the vein ***,the tissue engineered nerve graft had a lower ability to repair the defect than autogenous nerve *** summary,although the tissue engineered nerve graft constructed with autologous vein and nerve microtissue is not as effective as autologous nerve transplantation for repairing long-segment sciatic nerve defects,it may nonetheless have therapeutic potential for the clinical repair of long sciatic nerve *** study was approved by the Experimental Animal Ethics Committee of Chinese PLA General Hospital(approval No.2016-x9-07)on September 7,2016.

关键词： in vivo injury motor neurological function peripheral nerve injury rat recovery regeneration repair

On the Problems and Strategies Addressed to the Development of Local Colleges

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科技视界 2014年第8期 168-168,186页

作者：闫昭旭湖北工程学院外国语学院湖北孝感432000

Local colleges are the main bodies of Chinese higher education. Their proper and sound development will do good to the development of local economy and society. Compared with famous and key universities, their development is in inferior state and there are lots of problems. This article analyses the problems during their development process, then it puts forward relevant strategies so as to provide reference for the development of local colleges.

关键词：英语学习学习方法阅读知识阅读材料

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利用高斯混合模型的多光谱图像模糊聚类分割

光学精密工程 2017年第2期25卷 509-518页

作者：李玉徐艳赵雪梅赵泉华辽宁工程技术大学测绘与地理科学学院遥感科学与应用研究所辽宁阜新123000

针对传统分割算法难以实现高分辨率多光谱图像分割的问题,本文提出一种利用高斯混合模型的多光谱图像模糊聚类分割算法。该算法采用高斯混合模型定义像素对类属的非相似性测度,由于该算法具有高精度拟合数据统计分布能力,故可以有效剔... 详细信息

针对传统分割算法难以实现高分辨率多光谱图像分割的问题,本文提出一种利用高斯混合模型的多光谱图像模糊聚类分割算法。该算法采用高斯混合模型定义像素对类属的非相似性测度,由于该算法具有高精度拟合数据统计分布能力,故可以有效剔除噪声对分割结果的影响。同时,引入隐马尔科夫随机场(Hidden Markov Random Field,HMRF)定义邻域作用的先验概率,并将其作为各高斯分量权值以及KL(Kullback-Leibler)信息中控制聚类尺度的参数,从而增强了算法对复杂场景遥感图像的鲁棒性,进一步提高了算法的分割精度。对模拟图像和高分辨多光谱图像分割结果进行了定性定量分析。实验结果表明:模拟图像的总精度达96.8%以上。这验证了本文算法在分割高分辨率多光谱图像时具有保留细节信息的能力,而且也证实了算法的有效性和可行性。该算法能够实现高分辨率多光谱图像的精确分割。

关键词：图像分割高分辨率多光谱图像非相似性测度高斯混合模型先验概率

Proteomic analysis of developing Cunninghamia lanceolata seeds

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Proteomic analysis of developing Cunninghamia lanceolata see...

新型安全防护三件套约束用具在躁动患者中的应用及效果评价

第六届全国林木遗传育种大会

作者： Zhen yan xu Shuping zhao Zhenzhou Wang Zhanjun Shi Jisen 南京林业大学林木遗传育种与生物技术省部共建重点实验室

＜正＞Embryogenesis of gymnosperm plant is a complex,dynamic and multistage *** this study,the Chinese fir seeds were analyzed at six stages spanning important developmental phases. The proteome profiles of seed samples were analyzed using 2-D difference gel electrophoresis （DIGE）.One hundred thirty-six protein spots differing in kinetics of appearance were subjected to LC-MS/MS and MALDI-TOE Mass spectrometry data were interpreted that identified 77 of them. Hierarchical cluster analysis of the 77 spots recognized three main developmental profiles. Functional annotation of the Chinese fir developing seed proteins revealed that PCD is a central process for seed development,which may be multiple programs to execute PCD process in Chinese fir *** were also identified involved in carbon metabolism,Met metabolism,energy production,protein storage,synthesis and stabilization,disease/defense,cytoskeleton protein and proteins related to embryo *** involved in carbon metabolism were higher expression at the early stages,which probably provide substrates for starch *** related to Met metabolism were accumulated at the later stages,which had key role in the building block for protein and polyamines and hormone ethylene and implicated seed development tending to mature. This study provides a reference map for seed development of Chinese fir and might serve as potential markers for specific stage of seed development.

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来源： cnki会议评论

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中国全科医学 2017年第20期20卷 2547-2550页

作者：徐艳赵蓓蔡丽江苏省连云港市第一人民医院神经内科 222002

目的探讨新型安全防护三件套约束用具在躁动患者中的应用效果。方法选取连云港市第一人民医院神经内科重症监护室收治的患者,其中2015年7—12月使用传统约束用具的躁动患者66例为对照组,2016年2—7月使用新型安全防护三件套约束用具的... 详细信息

目的探讨新型安全防护三件套约束用具在躁动患者中的应用效果。方法选取连云港市第一人民医院神经内科重症监护室收治的患者,其中2015年7—12月使用传统约束用具的躁动患者66例为对照组,2016年2—7月使用新型安全防护三件套约束用具的躁动患者61例为试验组,比较两组患者在约束期间非计划拔管发生率、皮肤损伤发生率、镇静药物使用率及家属对约束的满意率的差异。结果对照组留置导管总数为164根,非计划拔管18根(10.98%);试验组留置导管总数为179根,非计划拔管4根(2.23%);试验组非计划拔管发生率低于对照组(χ~2=10.894,P=0.001)。试验组皮肤损伤发生率[11.48%(7/61)]低于对照组[39.39%(26/66)](χ~2=12.848,P<0.001)。试验组镇静药物使用率[19.67%(12/61)]低于对照组[40.91%(27/66)](χ~2=6.719,P=0.012)。试验组家属满意率[85.25%(52/61)]高于对照组[40.91%(27/66)](χ~2=26.506,P<0.001)。结论新型安全防护三件套约束用具能够有效降低躁动患者非计划拔管发生率,减少皮肤损伤的发生,降低镇静药物使用率,提高家属对约束的满意率,值得在临床躁动患者中大力推广应用。

关键词：约束,身体的躁动防护服

基于风险传导BN模型的建筑施工安全预警仿真

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计算机仿真 2024年第1期41卷 527-531页

作者：徐艳召郭靳时长春工业大学人文信息学院吉林长春130122 吉林建筑大学土木工程学院吉林长春130119

为了实现建筑施工安全有效预警,提出多因素耦合的风险因素检测预警方法。通过问卷调查法收集风险指标,通过龙巴赫Alpha系数与巴特利特球形度指标相结合的方法建立风险评价体系。以建筑施工现场的风险传导特征为基础,运用DEMATEL方法分... 详细信息

为了实现建筑施工安全有效预警,提出多因素耦合的风险因素检测预警方法。通过问卷调查法收集风险指标,通过龙巴赫Alpha系数与巴特利特球形度指标相结合的方法建立风险评价体系。以建筑施工现场的风险传导特征为基础,运用DEMATEL方法分析影响建筑施工安全的多因素间耦合关系,并建立风险传导BN模型,通过对风险级别的分析判定,实现多因素耦合的建筑施工安全预警,降低事故发生概率。实验结果表明,所提方法在建筑施工安全预警中表现出良好的预警精度,在多因素耦合的情况下,其可以准确获得致使事故发生的主要因素。

关键词：问卷调查法龙巴赫系数风险传导模型建筑施工预警方法

同方期刊数据库

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Internet蠕虫的早期检测和响应机制

吉林大学学报（工学版） 2007年第4期37卷 854-859页

作者：魏达刘衍珩王健田大新许彦钊吉林大学计算机科学与技术学院

针对Kalman滤波器在检测蠕虫时具有对检测时间间隔敏感的不足,基于流行病学蠕虫传播模型,提出了一种具有多个检测时间间隔的Kalman滤波器蠕虫早期检测方法和蠕虫响应机制。实验模拟表明:该检测方法和响应机制能达到有效减缓蠕虫大范围... 详细信息

针对Kalman滤波器在检测蠕虫时具有对检测时间间隔敏感的不足,基于流行病学蠕虫传播模型,提出了一种具有多个检测时间间隔的Kalman滤波器蠕虫早期检测方法和蠕虫响应机制。实验模拟表明:该检测方法和响应机制能达到有效减缓蠕虫大范围快速传播的目的。

关键词：计算机系统结构蠕虫早期检测 Kalman滤波器蠕虫传播模型