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Search Results: 1 - 10 of 107242 matches for " 路晓崇 "
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烘烤过程中烘烤环境对烤烟外观特征的影响
Influence of curing environment on tobacco appearance characteristics during curing process

宋朝鹏,,,
- , 2017,
Abstract: 【目的】了解烤烟烘烤过程中烘烤环境对烟叶外观特征变化的影响,为烟叶精准化烘烤的实现提供理论依据。【方法】利用色差仪提取烟叶的颜色特征值,用Matlab2015b获取烟叶纹理特征值,然后对烘烤过程中烟叶颜色特征指标和纹理特征指标的变化进行分析,并运用典型相关分析法对烘烤过程中烘烤环境指标(温度、叶温、水汽压差、相对湿度、风速、风压)与颜色指标(明度、红度、黄度、饱和度、色相角)、纹理指标(能量、熵、惯性矩、相关度)的关系进行分析。【结果】随着烘烤的进行,烟叶颜色特征值的变化均呈上升趋势,且正反面变化规律相似;烟叶纹理特征值中纹理能量和相关度不断减小,纹理熵和惯性矩不断增加,且在42~46 ℃变化幅度较大;叶温对烟叶颜色的色相角和正面黄度有较大影响;烤房温度主要对烟叶颜色的明度、饱和度、色相角和黄度有较大影响,而相对湿度对烟叶颜色的红度有较大影响,但是温度和相对湿度均对烟叶纹理的能量、相关度和熵有较大影响,风压对烟叶纹理惯性矩有较大影响,而其他环境指标对烟叶颜色和形态纹理变化的影响较小。【结论】不同的烘烤环境指标对烟叶颜色和纹理的变化有不同程度影响,可依据研究结果及烟叶特色适当调控烟叶的颜色与形态变化。
【Objective】This study investigated the influence of curing environment on tobacco morphology during curing process to provide theoretical basis for realization of precise curing. 【Method】The chromatic instrument was used to obtain color feature and Matlab2015b was used to obtain texture feature,and the canonical correlation was conducted to analyze the relationship between curing environment variables (temperature,leaf temperature,vapor pressure difference,relative humidity,wind speed,and wind pressure) with color features (lightness,redness,yellowness,saturation,and hue angle) and texture features (energy,entropy,moment of inertia,and correlation degree).【Result】The change of tobacco color feature values showed an upward trend, and the morphology features of front and back had a similar trend. The tobacco texture energy and correlation degree decreased,while entropy and moment of inertia increased,and the changes were more substantial at 42-46 ℃.The leaf temperature had great effect on hue angle and yellowness of front,the temperature in curing barn affected lightness,saturation,hue angle and yellowness.Relative humidity had great influence on redness, and both temperature and relative humidity had great influence on texture energy,correlation degree, and entropy of tobacco.Wind pressure had high relationship with texture inertia,but other variables had minor effect on color and texture.【Conclusion】Different curing environmental variables had different effects on color and texture of tobacco leaves.
烤烟散叶插签烘烤过程中叶间隙风速的变化
Change of wind speed in leaves gap of lose-leaf bulk curing with leaf-holding needle during curing process

,宋朝鹏,,
- , 2017,
Abstract: 【目的】了解烟叶密集烘烤过程中叶间隙风速的变化,为实现烤烟的精准烘烤提供参考。【方法】采用风速仪对中棚烟叶8个位点的叶间隙风速进行实时监测,同时记录烤房的干湿球温度,并于烘烤开始后每隔4 h取样1次,测定烟叶叶片与叶脉的含水率。【结果】烘烤过程中8个位点叶间隙风速差异较大,其中6号位点的风速始终处于较低水平;不同烘烤阶段各位点风速的变化比较复杂,大部分位点表现为先降后升的趋势;烟叶变黄阶段、定色阶段、干筋阶段烟叶间隙风速变化的主导因素分别为湿球温度与叶片含水率、烟叶主脉含水率与干球温度及主脉含水率。【结论】不同烘烤阶段影响叶间隙风速变化的因素并不相同,烘烤过程中可以有目的地调整烤房温湿度,并通过改善烟叶形态变化控制叶间隙风速的变化。
【Objective】This study investigated the changes of wind in tobacco leaves gap in bulk curing process to provide reference for accurate curing.【Method】The leaves gap wind at 8 loci in middle layer was monitored using anemometer in bulk curing process,and wet and dry bulb temperatures were recorded.Samples were taken every 4 h since the beginning of curing for water contents of leaf blade and main veins.【Result】There were large differences in leaves gap wind among the 8 loci during curing process.The wind speed of 6th loci was always at low level.The change of wind speed was complex at different curing stages with the tendency of increasing first before decreasing at most loci.Wet bulb temperature and moisture content of leaves were the dominant factors for the change of wind speed in yellowing stage.Moisture content of main vein and dry bulb temperature were the dominant factors in the color setting stage.Moisture content of main vein was the dominant factor in the killing out stage.【Conclusion】The influence factors were different in different curing stages.The wind speed of leaves gap could be controlled by adjusting the temperature and humidity of the curing barn
烤烟散叶插签烘烤过程中叶温的变化
,宋朝鹏?,娄元菲
西北农林科技大学学报(自然科学版) , 2014,
Abstract: 【目的】研究烤烟散叶插签烘烤过程中叶温的变化情况,完善散叶烘烤工艺,以推动散叶密集烘烤的落实与推广。【方法】运用叶温测定仪与温湿度自控仪,测定烟叶在散叶插签烘烤过程中的叶温、干球温度、湿球温度和相对湿度,探讨烘烤过程中叶温变化的影响因素。【结果】散叶插签烘烤过程中叶温的变化分为4个阶段:预热阶段、叶温平稳阶段、缓慢升温阶段、快速升温阶段。在叶温变化的不同阶段主要影响因素不同,预热阶段的主要影响因素是干球温度;叶温平稳阶段的主要影响因素以干球温度为主,以湿球温度与相对湿度为辅;缓慢升温阶段的主要影响因素是湿度;快速升温阶段的主要影响因素是温度。【结论】散叶密集烘烤过程中叶温的变化代表了叶片的真实烘烤状态,对研究散叶烘烤过程中烟叶物质转化和烟叶质量形成有一定意义,有助于进一步完善散叶烘烤工艺。
烟叶烘烤过程中流水线烤房的空气介质分析
Analysis of air medium in pipelined flue-cured tobacco curing barn during curing process

宋朝鹏,武劲草,,
- , 2017,
Abstract: 【目的】了解流水线烤房烘烤介质中温度、相对湿度以及风速的变化,明确各参数之间的影响。【方法】以8隧道30 m流水线烤烟烤房为研究对象,测定烘烤过程中的温度、相对湿度和风速。【结果】1)流水线烤房烘烤过程中变黄期时间为40~47 h,定色期时间为43~48 h,干筋期时间45~52 h。2)在烤烟烘烤过程中,流水线烤房的Ⅰ区、Ⅱ区与Ⅵ区4路烟叶的温度无显著性差异,Ⅲ区~Ⅴ区4路烟叶表现为两侧温度大于中间温度;各区段4路烟叶的相对湿度有相对较大差异;整个烘烤过程叶间隙风速的变化趋势比较复杂,总体表现为C路烟叶的叶间隙风速最小,两侧烟叶的风速保持在较高水平;但各路烟的烘烤环境均能满足烘烤需求,且烤后烟的品质差异不大。3)各区段流水线烤房内的风速对温湿度的变化有不同程度影响。4)与普通密集烤房相比,流水线烤房能够提高烟叶品质,降低光滑烟的比例。【结论】流水线烤房能够很好地满足当前烟叶生产的需求,进一步提高烟叶生产的经济效益。
【Objective】This study investigated the environment temperature,humidity and wind changes in the line curing barn and the interactions between parameters. 【Method】A 30 m pipeline tunnel drying room was selected to measure temperature,humidity,and wind speed during curing process.【Result】1) In the curing process,yellowing stage was 40-47 h,color fixing time was 43-48 h,and the drying time was 45-52 h.2) There was no significant difference in temperature between the 4 ways of tobacco in Ⅰ zone,Ⅱ zone and Ⅵ zone,but the bilateral temperature of Ⅲ zone-Ⅴzone was greater than middle temperature.The relative humidity of 4 ways had relatively larger difference while the change of wind speed was complex in the whole curing process.The wind speed between tobacco leaves of C way was the minimum while on sides of leaves was high.The curing environment of all 4 ways could meet the curing requirements,and there was small difference in tobacco quality.3) The wind speed of pipeline curing barn had different influences on temperature and humidity.4) Compared with the ordinary bulk curing barn,the pipelined flue cured tobacco curing barn could improve tobacco quality,and the proportion of solid and stiff tobacco was decreased.【Conclusion】The pipelined flue cured tobacco curing barn could meet the demand of tobacco curing, and improve the economic benefit of tobacco production.
诱导胚胎干细胞向角膜上皮细胞分化的实验研究
王智,葛坚,黄冰,高前应,刘炳乾,王凌华,喻瓴,范志刚,,刘敬波
中国科学 生命科学 , 2005,
Abstract: 探索胚胎干细胞在表层角膜缘基质诱导下向角膜上皮细胞分化的可能性. 体外培养带GFP标记的 ES-D3细胞, 并利用视黄酸进行预诱导, 然后将预诱导后的细胞接种在表层角膜缘基质上, 细胞融合形成单层后, 随机分为3组进行研究 第1组传代后直接进行检测; 第2组在气-液界面上培养10天, 然后植入裸鼠皮下以进行体内诱导; 第3组作为对照组, 不给予GFP-ES-D3细胞特殊诱导条件, 细胞自由分化. 诱导分化的细胞植入裸鼠皮下体2周后没有畸胎瘤形成. 诱导分化的细胞呈现上皮样外观, 体内诱导组和体外诱导组免疫组织化学染色均检测到CK3, P63和PCNA表达阳性, 电子显微镜检查可见两组细胞表面都有微绒毛和细胞间紧密连接形成. 实验对照组部分细胞脱落和死亡, 大部分表现神经样细胞的树突样外观, 小部分未死亡的贴壁细胞呈多态性, 这些结果表明胚胎干细胞在特定条件下经表层角膜基质诱导能够分化为角膜上皮细胞. 胚胎干细胞诱导分化有可能为眼表重建和组织工程化角膜的构建提供上皮种子细胞.
Honey adulteration detection using liquid chromatography/ elemental analysis-isotope ratio mass spectrometry
液相色谱/元素分析-同位素比值质谱联用法鉴定蜂蜜掺假

FEI Xiaoqing,WU Bin,SHEN Chongyu,DING Tao,LI Lihua,LU Ying,
,吴斌,,丁涛,李丽花,

色谱 , 2011,
Abstract: A new method for honey adulteration detection using liquid chromatography/elemental analysis-isotope ratio mass spectrometry (LC/EA-IRMS) was developed. Based on the individual δ13C values detected for 38 authentic honey samples, the limits for the authentic honey samples were proposed: the δ13C difference between protein and honey (Δδ13CP-H) should be higher or equal to than ~0.95‰, the δ13C difference between fructose and glucose (Δδ13CF-G) should be from ~0.64‰ to 0.53‰, and the maximum difference of δ13C values between all the components (Δδ13Cmax) should be lower than 2.09‰. Based on the above criteria, the 58 positive samples spiked with C4 or C3 plant sugar syrup were confirmed by LC/EA-IRMS method from 150 commercial honey samples, while only 7 samples spiked with C4 plant sugar syrup were confirmed by the official EA-IRMS method. The proposed method represents a significant improvement in comparing with the official EA-IRMS method.
诱导胚胎干细胞向角膜上皮细胞分化的实验研究
王智,葛坚,黄冰,高前应,刘炳乾,王凌华,喻瓴,范志刚,,刘敬波
中国科学 生命科学 , 2005,
Abstract: 探索胚胎干细胞在表层角膜缘基质诱导下向角膜上皮细胞分化的可能性.体外培养带GFP标记的ES-D3细胞,并利用视黄酸进行预诱导,然后将预诱导后的细胞接种在表层角膜缘基质上,细胞融合形成单层后,随机分为3组进行研究:第1组传代后直接进行检测;第2组在气-液界面上培养10天,然后植入裸鼠皮下以进行体内诱导;第3组作为对照组,不给予GFP-ES-D3细胞特殊诱导条件,细胞自由分化.诱导分化的细胞植入裸鼠皮下体2周后没有畸胎瘤形成.诱导分化的细胞呈现上皮样外观,体内诱导组和体外诱导组免疫组织化学染色均检测到CK3,P63和PCNA表达阳性,电子显微镜检查可见两组细胞表面都有微绒毛和细胞间紧密连接形成.实验对照组部分细胞脱落和死亡,大部分表现神经样细胞的树突样外观,小部分未死亡的贴壁细胞呈多态性,这些结果表明胚胎干细胞在特定条件下经表层角膜基质诱导能够分化为角膜上皮细胞.胚胎干细胞诱导分化有可能为眼表重建和组织工程化角膜的构建提供上皮种子细胞.
对中国社会分层的理论研究——关于分层指标的理论背景和制度背景的阐述
,
社会学研究 , 1989,
Abstract: 在我国社会主义初级阶段存在不存在社会成员在社会地位上的垂直分化?如果存在,它的状况及形成条件是什么?如何评价这种分化?在此基础上是否存在社会成员的利益分化并形成利益集团?所有这一切对于我国的改革和发展有什么影响?回答这些问题,对于认识社会主义初级阶段的性质与特点,特别是对于认识现阶段的社会结构具有重要意义。为此我们曾于1987年在沈阳和北京两地作过实证调查,本文即是我们在实证研究过程中的一些理论思考。
1947—2006年东半球陆地干旱化特征——基于SPEI数据的分析
,
中国沙漠 , 2012,
Abstract: 利用1947—2006年逐月全球陆地高分辨率(0.5°×0.5°)标准化降水蒸散指数SPEI(StandardizedPrecipitationEvapotranspirationIndex)资料,分析了过去60a东半球(40°S—80°N,20°W—180°E)陆地的干旱化趋势和变率、干旱面积变化、干旱事件的持续性和周期性以及可能的变化成因等。结果显示,东半球80%的陆地上目前处于干旱化进程中,其中北非及中蒙边界等地干旱化趋势最为显著。干旱变率最大地区出现在非洲北部、中国青藏高原、中国西北东部及中蒙边界一带、俄罗斯中北部以及东北部。北非、中蒙边界中段及中国青藏高原地区也是持续性异常干旱事件出现频次最高的地区。基于功率谱的周期分析则显示,东半球大部分地区第一显著周期为1.5~3a左右,中亚部分地区存在准4a周期振荡,而北非地区存在准12a周期的年代际变化。SPEI距平场的经验正交函数(EOF)分析第一模态反映了东半球陆地大部分地区干旱化总体上具有一致性,对应的时间函数与全球陆地气温距平相关系数高达0.81,表明全球变暖与东半球干旱化趋势有着紧密联系;第二模态对应的时间函数与超前8个月的南方涛动指数(SOI)的相关系数为0.60,因而大尺度的干旱周期性振荡受ENSO活动影响显著。
As(Ⅲ)对活性污泥处理城市污水影响的动态模拟研究

环境科学学报 , 1995,
Abstract: 采用MLSS为1000mg/L,停留时间为10h的动态模拟实验,研究了As(Ⅲ)对活性污泥处理城市污水的某些影响。其结果:用10ppm、50ppmAs(⒄)处理后,氢酶活性抑制率分别为5.4%和14.4%,BOD5去除的抑制率分别为4.3%和10.5%,氨基酸总量的抑制率分别为3.41%和6.12%。
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