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Search Results: 1 - 10 of 84588 matches for " 黄银娣 "
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应用激光全息术对柴油雾化机理和喷雾特性的研究

南京林业大学学报(自然科学版) , 1997, DOI: 10.3969/j.jssn.1000-2006.1997.04.005
Abstract: <正>经各种条件下的全息照片的定性分析和采用计算机数字图像处理的定量分析,得出了喷雾场的粒子分布情况不同于传统观点所认为的分布情况,并基于液体破碎理论进行了雾化机理的分析;讨论了喷射时间、气缸背压、喷射压力、喷油嘴结构对喷雾特性的影响。
汽车发动机异响模糊诊断
闵永军,,万茂松,?先
南京林业大学学报(自然科学版) , 1998, DOI: 10.3969/j.jssn.1000-2006.1998.02.005
Abstract: <正>论述了基于模糊数学理论的汽车发动机异响模糊诊断方法,提出了模糊诊断数学模型、模糊关系矩阵的建立方法及模糊推理诊断过程。据此建立的汽车故障诊断专家系统,提高了对发动机异响故障诊断的准确性和可信度。
Diagnostic Application of Machinery Equipment Condition-Based Maintenance (CBM)
机械设备预维修诊断方法举例

XU Zhen,HUANG Yin-Di,
徐振
,

计算机系统应用 , 2011,
Abstract: This paper introduced the concept of CBM and illuminated two diagnostic applications of machinery equipment CBM.One is Expert System Diagnostic,and the other one is Numerical Feature State Recognition Method.It compared the two methods.In the end,it showed some example of CBM diagnostic system.
Core Techniques of Condition-Based Maintenance Development
设备预维修诊断系统技术

XU Zhen,HUANG Yin-Di,
徐振
,

计算机系统应用 , 2011,
Abstract: This paper first introduced the characteristic, composition and the function of every CBM module. Then through investigating the situation of CBM study at home and aboard, it got the core techniques of CBM development--Data Processing and Fault Diagnosis Algorithm. In the end it gave a model of the usage of CBM, in order to analyze and study the exploitation process of the modules.
黄芪皂苷抗实验性肝损伤作用
,沈建平,朱树华,大贶,丁勇,张晓林
药学学报 , 1992,
Abstract: 两种黄芪苷asi和sk能对抗d-半乳糖胺,醋氨酚引起的肝损伤。表现为减轻肝毒引起的病变,sgpt降低,肝mda下降,gsh升高;且三项指标变化呈明显相关。从离体大鼠肝细胞制备法也证明asi和sk在0.75μmol/l~0.18nmol/l浓度范围内,可对抗ccl4引起的gpt升高。给小鼠连续灌服asi12,50mg/kg或sk6,20mg/kg能提高肝微粒体细胞色素p—450活性。此结果表明,黄芪苷是黄芪抗肝毒损伤的有效成分。其机理除抗生物氧化外,尚与代谢调节作用有关。
新型表面活性剂柠檬酸单酯的溶液性能研究及其在凝胶油中的应用

- , 2018, DOI: 10.13982/j.mfst.1673-9078.2018.05.017
Abstract: 凝胶油不仅在功能食品中得到广泛应用,而且在药物制剂、化妆品领域也有重要应用前景。本文通过直接酯化法合成了两种柠檬酸单酯,并对其作为凝胶因子性能进行了研究。利用表面张力仪、电导率仪以及动态光散射仪等方法对两种柠檬酸酯的溶液聚集行为和胶束形成热力学进行了分析。结果表明,25 ℃下,柠檬酸月桂醇单酯和柠檬酸异癸醇单酯的临界胶束浓度分别为3.30 mmol/L和6.40 mmol/L。同时,研究了离子强度对胶束形成过程的影响,结果表明,无机盐不仅影响胶束聚集数,而且使得柠檬酸异癸醇单酯的胶束尺寸降低约100 nm,柠檬酸月桂醇单酯的胶束尺寸降低约200 nm。凝胶油性能研究结果表明,最低凝胶浓度为7%,溶胶-凝胶转变温度为45~53 ℃之间,两种柠檬酸酯均能与植物油形成凝胶。生物相容性研究结果表明,两种柠檬酸酯在浓度为200 mg/L时对微生物生长没有显著影响,具有良好的生物相容性。
Oleogel is not only widely used in functional foods, but also has important application prospects in the fields of pharmaceutical preparations and cosmetics. Two citric acid monoesters were synthesized by direct esterification, and their properties of gel were studied in this paper. The solution aggregation behavior and micellar thermodynamics of these two citric acid monoesters were analyzed by surface tension meter, conductivity meter and dynamic light scattering instrument, and the results showed that the critical micelle concentrations of lauryl citric acid monoester and isodecyl citric acid monoester at 25 oC were 3.30 mmol/L and 6.40 mmol/L, respectively. In addition, the effects of ionic strength on the formation of micelles were also studied, and the results showed that inorganic salts not only affected the aggregation number of micelles, but also reduced the micelle size of isodecyl citric acid monoester and lauryl citric acid monoester by about 10 nm and 200 nm. The studies of oleogel properties indicated that both of the two citric acid monoesters could form the gel with vegetable oil. The minimum concentration was 7% and the temperatures of the sol-gel transition were all between 45~53 oC. Also, the results of biocompatibility studies showed that the two citric acid monoesters had no significant effect on the growth of microorganisms at a concentration of 200 mg/L, indicating that the citric acid monoesters had good biocompatibility.
基于KPCA和FCM的HJ-1A星遥感数据分类
白杨,
国土资源遥感 , 2013, DOI: 10.6046/gtzyyg.2013.01.13
Abstract: 为提高对环境与灾害监测预报小卫星1A(HJ-1A)星遥感数据分类的精度,首先将HJ-1A星HSI高光谱数据和CCD多光谱数据进行GS(Gram-Schmidt)融合,然后利用主成分分析法(principalcomponentanalysis,PCA)和核主成分分析法(kernelPCA,KPCA)分别对融合后的高光谱图像进行降维处理。KPCA降维时采用高斯、线性和多项式3种核函数,根据特征提取效果评价结果,选择累积贡献率较大的多项式核函数。最后,分别对融合后的高光谱图像、PCA主成分图像和基于多项式核函数的KPCA主成分图像进行模糊C均值分类。实验结果表明,KPCA对融合后高光谱图像的特征提取得到了较好的效果,同时提高了分类精度和效率。
遥感图像分割的迭代上下文融合小波域HMT模型
韩冰,,戈乐乐
测绘学报 , 2013,
Abstract:
美托洛尔光学异构体在犬体内的药动学-药效学结合模型
印晓星,
药学学报 , 1997,
Abstract: 用麻醉犬研究美托洛尔(met)光学异构体药动学—药效学结合模型。结果表明,ig(+)-met或(-)-met后,其药动学符合二室模型,药动学参数vd/f,cls/f和auc在两种met之间有显著性差异。(+)-met和(-)-met的效应和血药浓度关系呈逆时针滞后环。引入效应室理论后,药效和效应室浓度之间的关系符合sigmoid-emax模型。应用capp软件进行模型拟合,血药浓度的预测值和药效的预测值皆与其实测值较为接近。(+)-met抑制vmax,dp/dtmax及hr效应的ce50分别是(-)-met的3.7,6.8,6.3倍,证实(-)-met对犬心脏的抑制作用强于(+)-met。
石英晶体微天平在口腔医学研究中的应用
Application of quartz crystal microbalance in stomatological research

,滕伟()
- , 2018, DOI: 10.7518/gjkq.2018.06.019
Abstract: 摘要:
石英晶体微天平(QCM)是一种高精度、实时测量的传感器,利用压电效应的原理检测痕量的变化。由于它能够检测到纳克级的质量变化,目前在分子生物学、疾病诊断和治疗、药物分析、有机化学、环境污染监测、食品卫生监督等领域得到了广泛的应用。本文主要阐述了QCM的工作原理以及其在口腔医学研究中的应用进展,包括QCM在聚电解质膜及涂层改性、蛋白吸附、种植体抗菌性、唾液、牙菌斑形成等方面的研究应用。
Abstract:
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