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黄土各向异性强度特性的真三轴试验研究
邵生,许萍,王强,
岩石工程学报 , 2014,
Abstract: 黄土水平面内沉积结构及其发育的竖向裂隙构造使其具有明显的各向异性特征。通过黄土竖直裂隙向及其正交方向作用三维主应力状态几何空间八面体平面上3个空间域的真三轴试验,揭示了各空间域不同中主应力比值应力路径的剪切应力应变变化规律及抗剪强度变化规律。表明黄土竖向裂隙向作用大主应力的抗剪应力均大于水平面内正交两向作用大主应力的抗剪应力;中主应力增强作用能够诱导黄土的各向异性结构性;横观各向同性或者各向异性黄土八面体面上的强度破坏面随着平均球应力增大均呈椭圆、圆和曲边三角形变化,椭圆形破坏面可分别由轴对称压缩空间滑动面强度准则或轴对称挤伸空间滑动面强度准则近似地描述。
结构性黄土的剪切带及强度特性的真三轴试验研究
邵生,陈菲,,陆嫄
岩土力学 , 2015,
Abstract: 采用西安理工大学自主研发的真三轴仪,对西安白鹿原黄土进行了不同中主应力比值、不同固结围压的试验研究,探讨了黄土剪切带形成与峰值强度、中主应变与大主应变关系曲线、体应变与大主应变关系曲线特征点之间的联系以及子午平面、平面上的强度变化规律。分析了真三轴应力条件下黄土强度变形规律和试样剪切带破坏模式和黄土在复杂应力状态下剪切带形成的判断依据和原因,研究表明,真三轴压缩原状黄土具有明显的剪切带,围压和中主应力比值较小时表现为软化,围压和中主应力比值较大时则表现为硬化;中主应变、体应变与大主应变关系曲线较为一致的转折点反映了土变形性状发生变化;与中主应变方向一致的剪切带两侧土结构块体产生相对滑移,剪切带开始形成和发展;土应变曲线的转折点可以作为土固结结构内剪切带形成的判断依据;子午平面上强度线呈线性变化规律,平面上呈曲边三角形非线性变化规律,并且与-smp强度准则较为接近。不同应力条件下剪切带变化复杂的破坏模式与黄土原生的结构特征和加载共同作用的变化有密切联系。
灌浆期不同光强对水稻不同粒位籽粒品质的影响
董明辉,,,陈培峰,,乔中英
中国生态农业学报 , 2013,
Abstract: 为探讨灌浆期光照强度对水稻籽粒品质的影响及在不同品种类型和粒间差异,揭示弱光下水稻籽粒充实不良和米质变劣的生理机制,本文以代表性的超级稻品种"扬两优6号"和"武运粳23"为材料,以穗中部不同粒位籽粒为研究对象,以自然光强为对照,设置3种弱光处理(光强分别为对照的71%、55%和40%),研究了灌浆期不同光照强度对稻米品质的影响。结果表明:1)灌浆期光照强度对稻米品质影响较大,光强减弱稻米品质变劣,光照对米质形成的影响因光照强度大小、品种类型和籽粒着生位置不同而存在差异,同枝梗上迟开花籽粒稳定性较差,早开花籽粒稳定性较好。2)随光照强度降低,整精米率和直链淀粉含量降低,垩白度增加,不同光强下一次枝梗籽粒变化幅度大于二次枝梗籽粒;光强越弱,崩解值越低,消减值和粗蛋白含量越高,稻米蒸煮食味品质变差。3)生产上应因品种类型合理安排播期,通过栽培措施改善稻株受光条件,减轻光照不足对稻米品质形成的影响。
连续玻纤增强聚丙烯熔融浸渍过程降黏研究
李莹,曹敏华,信春玲,任峰,,何亚东
- , 2018, DOI: 10.13543/j.bhxbzr.2018.01.005
Abstract: 将不同配比的高黏度聚丙烯与低黏度聚丙烯共混制备高低黏度树脂混配基体,旋转流变测试结果显示低黏度聚丙烯的加入显著降低了共混体系的黏度。以高低黏度聚丙烯共混物为热塑树脂基体,采用熔融浸渍方法制备连续玻纤增强聚丙烯热塑预浸带。研究发现随着低黏度聚丙烯含量的增加,热塑树脂基体的加工性能明显提高,预浸带制品的孔隙率及纤维断裂率逐渐降低。将各组预浸带模压成型后进行力学测试,结果显示低黏度聚丙烯的加入使层压板层间剪切强度、弯曲强度、拉伸强度均出现小幅度下降,而对冲击强度基本无影响。结合加工性能及力学性能,低黏度聚丙烯质量分数10%时共混物的综合性能最佳。
Abstract:Different percentages of high viscosity polypropylene were blended with low viscosity polypropylene. Rotational rheological tests showed that the addition of low viscosity polypropylene significantly reduced the viscosity of high viscosity polypropylene. Continuous glass fiber reinforced polypropylene thermoplastic prepregs were prepared by the melt impregnation method using high and low viscosity polypropylene blends as the thermoplastic resin matrix. It was found that the processing performance of the thermoplastic resin matrix was improved by increasing the content of low viscosity polypropylene, whilst the porosity and fiber breaking rate of the prepreg decreased. Each group of prepregs was molded and mechanically tested. The results show that the addition of low viscosity polypropylene causes the interlaminar shear strength, flexural strength and tensile strength to decrease slightly, but has no effect on the impact strength. In terms of the combined processing performance and mechanical properties, adding 10% low viscosity polypropylene was found to give the best overall performance.
初探青少年情绪智力对消极情感的作用机制
How Emotional Intelligence Decrease Adolescences’ Negative Affect: A Pilot Study
 [PDF]


Advances in Psychology (AP) , 2016, DOI: 10.12677/AP.2016.63029
Abstract:
目的:考察独处能力在情绪智力与消极情感之间的中介作用。方法:采用情绪智力量表、独处能力量表、消极情感量表调查了310高中生。结果:1) 情绪智力、独处能力均与消极情感呈显著负相关,情绪智力与独处能力呈显著正相关。2) 情绪智力与独处能力均能显著地负向预测消极情感,且情绪智力通过独处能力的完全中介作用对消极情感产生间接的影响。
The present study investigated the relationship between emotional intelligence (EI) and negative affect (NA) among senior high school students. 310 participants were examined by Emotional In-telligence Scale, Solitary Coping Scale, and Negative Affect Scale. The result showed that 1) EI and Solitude both negatively related NA. 2) Further, Solitude played as a mediating role between the relationship of EI and NA.
地理信息系统支持下的煤岩煤质资料分析
,张建华
煤田地质与勘探 , 1996,
Abstract: 以内蒙古自治区乌达矿区为例,介绍了地理信息系统在煤岩煤质资料分析中应用的可能性、基本原理、方法、优势及其展望。在分析中使用了该系统的软件和dBASEⅣ,以科学的、系统的方式连接各类地质资料,从而提供了一种利用这些信息的简单方便的方法。
河流多年平均基流分割及其变化分析
Annual Average Baseflow Separation of River Runoff and Its Change Tendency
 [PDF]

曾华瞻, , 傅梦嫣
Journal of Water Resources Research (JWRR) , 2014, DOI: 10.12677/JWRR.2014.31009
Abstract: 1970~2008年广西北部湾经济区入海河流南流江和钦江的实测月径流量资料为分析对象,采用数字滤波法和最小平滑法对两条河流的总径流过程线进行了平均基流分割。结果表明,数字滤波法滤波3次得出的基流分割结果与最小平滑法得出的结果较为接近。南流江和钦江的年际总径流量变化起伏较大,年平均基流量变化稳定,两条河流的总径流和基流都表现出下降的趋势。
 Based on the measured monthly runoff data of Nanliu River and Qin River in Beibu Gulf Eco- nomic Zone in 1970-2008, the digital filtering method and smoothed minima method are used to separate the average baseflow. The results show that the baseflow calculated by the digital filtering method filtering 3 times are similar with that calculated by the smoothed minima method. The total runoffs of Nanliu River and Qin River have large temporal variation. The baseflow changes of two rivers are stable. And the total runoff and baseflow of two rivers appear a decline tendency.
Research on cultivated land extraction based on MODIS NDVI time series matching analysis——a case in middle part of Zhejiang
基于MODIS NDVI时间序列谱匹配的耕地信息提取研究——以浙中地区为例

WANG Hong-shuo,HUANG Jing-feng,XU Jun-feng,PENG Dai-liang,
王红说
,黄敬峰,,

浙江大学学报(农业与生命科学版) , 2008,
Abstract: MODIS NDVI data and time series matching method were used to extract the area of cultivated land with similar phenology.Time series of sample pixels from cultivated land were selected as standard time series spectrum,and the others were treated as testing time series spectrum to fix cultivated land according to t-test of matching coefficient.When matching position m=0,the matching accuracy at 10% t test level, with the correlation coefficient 0.60,was the highest of all levels;while the matching accuracy got from unsupervised classification of RMSE appraisal map, with higher correlation coefficient 0.79,was better than that of t-test method.The results indicate that cultivated land information extraction based on time series matching method was feasible and the matching accuracy could be used to reflect the consistent information about the phenologies of crop in study area.
Effect of light intensity on grain quality of rice at different spike positions during grain-filling stage
灌浆期不同光强对水稻不同粒位籽粒品质的影响

DONG Ming-Hui,HUI Feng,GU Jun-Rong,CHEN Pei-Feng,YANG Dai-Feng,QIAO Zhong-Ying,
董明辉
,,,陈培峰,,乔中英

中国生态农业学报 , 2013,
Abstract: Light intensity is an important ecological factor that greatly influences rice grain formation and quality. This study discussed the effects of light intensity on rice quality at grain-filling stage and the differences in variety types and spikelets at different panicle positions. To do this, two pot-grown super rice cultivars, "Yangliangyou 6" (indica) and "Wuyunjing 23" (japonica), were subjected to three light intensity treatments (71%, 55% and 40% of normal light intensity respectively) at post-anthesis grain-filling stage, with normal outdoor growth as the control. The study aimed to throw more light on the physiological mechanisms of rice grain formation to lay the theoretical basis for improved rice quality. The results suggested that light intensity during grain-filling greatly influenced rice quality. Compared with the control, rice grain quality under the three treatments worsened with the weakening of light intensity. Grain quality response to light intensity varied with light intensity degrees, variety genotypes and grain positions on rice panicles. While grain quality on spikelets with late flower formation was poorly stability, that on spikelets with early flower formation was relatively stable. Milled rice and rice amylose content decreased and chalkiness increased with the weakening of light intensity. Amplitude change in grains on primary tillers was relatively larger than in grain on secondary tillers. Also the weaker the light intensity, the lower was the breakdown value, the higher were the setback value and crud protein content, and the worse were the rice cooking and eating qualities. Reasonable sowing times based on variety type and scientific cultivation practices for improved light conditions and rice growth likely mitigated any negative impacts of low light intensity on rice quality.
胶体毛细管多孔薄层物料的干燥静力学
,马克承
化工学报 , 1995,
Abstract: 针对胶体毛细管多孔薄层物料干燥静力学问题,用非平衡热力学关联了多层吸附和毛细管凝聚现象,提出了新的数学模型,可在较宽的相对湿度范围内描述吸着等温线.当相对湿度较低时,本模型转化为BET公式.
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