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Development of Steel Slag-Based Solidification/Stabilization Materials for High Moisture Content Soil 被引量:2
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作者 Yu Jia Sudong Hua +3 位作者 Liying Qian Xiaojian Ren Jie Zuo Yanfang Zhang 《Journal of Renewable Materials》 SCIE EI 2022年第3期735-749,共15页
To solve the problems of high moisture content,high viscosity,and poor engineering mechanical properties of soil,this paper using with steel slag(SS)and desulfurization ash(DS)as initial raw materials,realizing the co... To solve the problems of high moisture content,high viscosity,and poor engineering mechanical properties of soil,this paper using with steel slag(SS)and desulfurization ash(DS)as initial raw materials,realizing the coop-erative treatment of solid waste and solidification of silt soil.The synergistic utilization of SS and DS can reduce the production cost of curing agent and promote its own consumption.According to blended cement of various SS contents and inspected compressive strength performances,the most suitable raw materials ratio was selected.The best formula for this curing agent is cement:steel slag=3:7 with 5%DS,and its 28-day compressive strength can reach 30 MPa.The experiment shows that the effect of DS and Na_(2)SO_(4) reagent with the same quality on early compressive strength improvement of cement and SS system is not much different.In this study,the mineral composition and microstructure of different gel system blocks were characterized by XRD,SEM and EDX,and a large number of webbed structures were found in the SEM test,which was not seen in previous studies.Besides,unconfined compressive strength(UCS),water resistance,and toxic characteristic leaching procedure(TCLP)were used to evaluate silt solidified soil properties.The results demonstrated that the solidified silt could meet not only the standard of general subgrade;but also has a partial stabilization effect of heavy metal ions. 展开更多
关键词 Steel slag desulfurization ash high moisture content soil synergistic effect STRENGTH stabilized soil
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A Cloud Framework for High Spatial Resolution Soil Moisture Mapping from Radar and Optical Satellite Imageries
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作者 GUO Tianhao ZHENG Jia +8 位作者 WANG Chunmei TAO Zui ZHENG Xingming WANG Qi LI Lei FENG Zhuangzhuang WANG Xigang LI Xinbiao KE Liwei 《Chinese Geographical Science》 SCIE CSCD 2023年第4期649-663,共15页
Soil moisture plays an important role in crop yield estimation,irrigation management,etc.Remote sensing technology has potential for large-scale and high spatial soil moisture mapping.However,offline remote sensing da... Soil moisture plays an important role in crop yield estimation,irrigation management,etc.Remote sensing technology has potential for large-scale and high spatial soil moisture mapping.However,offline remote sensing data processing is time-consuming and resource-intensive,and significantly hampers the efficiency and timeliness of soil moisture mapping.Due to the high-speed computing capabilities of remote sensing cloud platforms,a High Spatial Resolution Soil Moisture Estimation Framework(HSRSMEF)based on the Google Earth Engine(GEE)platform was developed in this study.The functions of the HSRSMEF include research area and input datasets customization,radar speckle noise filtering,optical-radar image spatio-temporal matching,soil moisture retrieving,soil moisture visualization and exporting.This paper tested the performance of HSRSMEF by combining Sentinel-1,Sentinel-2 images and insitu soil moisture data in the central farmland area of Jilin Province,China.Reconstructed Normalized Difference Vegetation Index(NDVI)based on the Savitzky-Golay algorithm conforms to the crop growth cycle,and its correlation with the original NDVI is about 0.99(P<0.001).The soil moisture accuracy of the random forest model(R 2=0.942,RMSE=0.013 m3/m3)is better than that of the water cloud model(R 2=0.334,RMSE=0.091 m3/m3).HSRSMEF transfers time-consuming offline operations to cloud computing platforms,achieving rapid and simplified high spatial resolution soil moisture mapping. 展开更多
关键词 soil moisture(SM) Google Earth Engine(GEE) Cloud Computing Platform high Spatial Resolution Soil moisture Estimation Framework(HSRSMEF) remote sensing Sentienl-1 Sentinel-2 Northeast China
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The Response of Anomalous Vertically Integrated Moisture Flux Patterns Related to Drought and Flood in Southern China to Sea Surface Temperature Anomaly 被引量:3
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作者 董娜 徐祥德 +4 位作者 蔡雯悦 王春竹 赵润泽 魏凤英 孙婵 《Journal of Tropical Meteorology》 SCIE 2023年第2期179-190,共12页
With the extreme drought(flood)event in southern China from July to August in 2022(1999)as the research object,based on the comprehensive diagnosis and composite analysis on the anomalous drought and flood years from ... With the extreme drought(flood)event in southern China from July to August in 2022(1999)as the research object,based on the comprehensive diagnosis and composite analysis on the anomalous drought and flood years from July to August in 1961-2022,it is found that there are significant differences in the characteristics of the vertically integrated moisture flux(VIMF)anomaly circulation pattern and the VIMF convergence(VIMFC)anomaly in southern China in drought and flood years,and the VIMFC,a physical quantity,can be regarded as an indicative physical factor for the"strong signal"of drought and flood in southern China.Specifically,in drought years,the VIMF anomaly in southern China is an anticyclonic circulation pattern and the divergence characteristics of the VIMFC are prominent,while those are opposite in flood years.Based on the SST anomaly in the typical draught year of 2022 in southern China and the SST deviation distribution characteristics of abnormal draught and flood years from 1961 to 2022,five SST high impact areas(i.e.,the North Pacific Ocean,Northwest Pacific Ocean,Southwest Pacific Ocean,Indian Ocean,and East Pacific Ocean)are selected via the correlation analysis of VIMFC and the global SST in the preceding months(May and June)and in the study period(July and August)in 1961-2022,and their contributions to drought and flood in southern China are quantified.Our study reveals not only the persistent anomalous variation of SST in the Pacific and the Indian Ocean but also its impact on the pattern of moisture transport.Furthermore,it can be discovered from the positive and negative phase fitting of SST that the SST composite flow field in high impact areas can exhibit two types of anomalous moisture transport structures that are opposite to each other,namely an anticyclonic(cyclonic)circulation pattern anomaly in southern China and the coastal areas of east China.These two types of opposite anomalous moisture transport structures can not only drive the formation of drought(flood)in southern China but also exert its influence on the persistent development of the extreme weather. 展开更多
关键词 drought in southern China in 2022 VIMFC anomaly high impact areas of SST anomaly anomalous moisture transport circulation pattern typical drought and flood years
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Moisture effect on compressive behavior of concrete under dynamic loading 被引量:3
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作者 周继凯 丁宁 《Journal of Central South University》 SCIE EI CAS 2014年第12期4714-4722,共9页
The effect of moisture content upon compressive mechanical behavior of concrete under impact loading was studied. The axial rapid compressive loading tests of over 50 specimens with five different saturations were exe... The effect of moisture content upon compressive mechanical behavior of concrete under impact loading was studied. The axial rapid compressive loading tests of over 50 specimens with five different saturations were executed. The technique "split Hopkinson pressure bar"(SHPB) was used. The impact velocity was 10 m/s with corresponding strain rate of 50 s-1. The compressive behavior of materials was measured in terms of stress-strain curves, dynamic compressive strength, dynamic increase factor(DIF) and critical strain at a maximum stress. The data obtained from test indicate that both ascending and descending portions of stress-stain curves are affected by moisture content. However, the effect is noted to be more significant in ascending portion of the stress-strain curves. Dynamic compressive strength is higher at lower moisture content and weaker at higher moisture content.Furthermore, under nearly saturated condition, an increase in compressive strength can be found. The effect of moisture content on the average DIF of concrete is not significant. The critical compressive strain of concrete does not change with moisture content. 展开更多
关键词 concrete split Hopkinson pressure bar high strain rate compressive behavior moisture content
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Effects of high temperature and high relative humidity drying on moisture distribution,starch microstructure and cooking characteristics of extruded whole buckwheat noodles
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作者 Linghan Meng Xuyang Sun +1 位作者 Yan Zhang Xiaozhi Tang 《Journal of Future Foods》 2024年第2期159-166,共8页
Drying is a key step in starch noodle production.The effects of high temperature(60,70,80°C)and high relative humidity(65%,75%,85%)drying(HTHD)on the moisture distribution,starch microstructure and cooking charac... Drying is a key step in starch noodle production.The effects of high temperature(60,70,80°C)and high relative humidity(65%,75%,85%)drying(HTHD)on the moisture distribution,starch microstructure and cooking characteristics of extruded whole buckwheat noodles were investigated.Compared to the conventional hot-air drying(CHAD)at 40°C,the increase in drying temperature(60–80°C)and the decrease in relative humidity(85%–65%)significantly improved drying efficiency of the extruded noodles.By adjusting drying temperature and relative humidity,the rate of moisture migration in noodles and phase transition of starch could be appropriately controlled.The optimum drying parameters(T70H75,70°C drying temperature and 75%relative humidity)showed smooth and dense network structure,resulting in the lowest cooking loss(6.61%),broken rate(0%),highest hardness(1695.17 g)and springiness(0.92).However,the total flavonoid content(TFC)and the total phenolic content(TPC)reduced by 6.81%–28.50%and 7.19%–53.23%in contrast to CHAD,and the color of buckwheat noodles became darker through HTHD.These findings showed the potential of HTHD for increasing drying efficiency and improving buckwheat noodle quality.The appropriate drying parameters could maintain a balanced relationship between moisture migration in noodles and phase transition of starch,which resulted in better cooking quality for extruded whole buckwheat noodles.Such a study is valuable for regulating the process conditions of buckwheat-based foods and promoting its commercial utilization. 展开更多
关键词 Extruded whole buckwheat noodle high temperature and high relative humidity drying moisture distribution Starch microstructure Cooking characteristics
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Effect of variety and seed dressing on emergence of high-oleic peanut under low temperature and high soil humidity conditions 被引量:1
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作者 Chuantang Wang Zhiwei Wang +4 位作者 Ying Wei Yueyi Tang Feifei Wang Hongwei Han Yan Sun 《Oil Crop Science》 CSCD 2021年第4期164-168,共5页
Low temperature coupled with high soil moisture during sowing to emergence generally results in poor peanut stand,thereby posing a non-negligible threat to peanut production in north and northeast China.Five high-olei... Low temperature coupled with high soil moisture during sowing to emergence generally results in poor peanut stand,thereby posing a non-negligible threat to peanut production in north and northeast China.Five high-oleic(HO)peanut cultivars and 4 seed dressing treatments capable of controlling several diseases and insect pests along with untreated checks were used to find the best combinations to cope with the dual stresses during sowing to emergence period.High broad-sense hereditability estimates of seedling emergence indicated great potential for genetic improvement of this trait.Analysis of variance in the split-plot experiment showed that the main effects of variety and seed dressing and their interaction on seedling emergence were significant.Seed dressing treatments increased seedling emergence percentage by 2.09–35.00 percent points.Four of the 5 HO peanut cultivars yielded satisfactory results.For Huayu 665,Huayu 668 and Huayu 965,Huweisanbao may be the best option;for Huayu 962,Weilidan was highly acceptable.These combinations will be evaluated further in multiple environments before large-scale extension. 展开更多
关键词 GROUNDNUT high oleate Seed-coating Split-plot design Emergence percentage Chill stress high soil moisture
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Spatial variability in carbon dioxide exchange processes within wet sedge meadows in the Canadian High Arctic
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作者 Claire M.WRIGHT Amy C.BLASER +1 位作者 Paul M.TREITZ Neal A.SCOTT 《Advances in Polar Science》 CSCD 2021年第1期1-19,共19页
Wet sedge meadows are the most productive plant communities in the High Arctic.However,the controls on carbon dioxide(CO_(2))exchange processes within wet sedge communities-and the scale at which they operate-are poor... Wet sedge meadows are the most productive plant communities in the High Arctic.However,the controls on carbon dioxide(CO_(2))exchange processes within wet sedge communities-and the scale at which they operate-are poorly understood.Here,the factors controlling CO_(2)exchange of wet sedge meadows experiencing different moisture regimes are examined.Environmental data are used to create predictive models of CO_(2)exchange on multiple temporal scales.Automated chamber systems recorded CO_(2)fluxes at 30-minute intervals at wet sedge sites in the Canadian High Arctic from June to August in 2014 and 2015.Static chambers were also deployed over a larger spatial extent in 2014.Our results show that wet sedge communities were strong CO_(2)sinks during the growing season(−7.67 to−44.36 g C·m^(−2)).CO_(2)exchange rates in wetter and drier areas within wet sedge meadows differed significantly(Wilcoxon,p<0.001),suggesting that soil moisture regimes within vegetation types influence net CO_(2)balance.Random Forest models explained a significant amount of the variability in CO_(2)flux rates over time(R2=0.46 to 0.90).The models showed that the drivers of CO_(2)exchange in these communities vary temporally.Variable moisture regimes indirectly influenced CO_(2)fluxes given that they exhibit different vegetation and temperature-response characteristics.We suggest that the response of a single vegetation type to environmental changes may vary depending on microenvironment variability within that community. 展开更多
关键词 high Arctic carbon dioxide exchange wet sedge soil moisture
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THE CALCULATING EQUATIONS OF THE THERMOPHYSICAL PARAMETERS OF THE MOIST AIR AT HIGH TEMPERATURE
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作者 张静波 刘刚 《Journal of China Textile University(English Edition)》 EI CAS 1997年第1期62-67,共6页
By using compression factors of real gas and the Vilia equations and considering the variation of the thermophysical parameters of the mois air with its temperature, this paper develops the calculating equations of th... By using compression factors of real gas and the Vilia equations and considering the variation of the thermophysical parameters of the mois air with its temperature, this paper develops the calculating equations of the thermophysical para leters of the moist air at high temperature ranging from 100℃- 200℃. It is convenient to calculate the thermophysical parameters and the thermophysical processes of the moist air at high temperature. 展开更多
关键词 enthalpy-moisture DIAGRAM t high temperature thermophysical parameters the moist air
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以牛肉为基准高水分组织化植物蛋白的工艺优化 被引量:1
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作者 安红周 孙嘉瑜 +3 位作者 王莉芬 任静文 金慧 黄泽华 《河南工业大学学报(自然科学版)》 CAS 北大核心 2024年第3期26-33,共8页
为探究高水分组织化植物蛋白(HMTVP)模拟块状熟牛肉的最佳工艺,以大豆分离蛋白、小麦淀粉、谷朊粉、豆粕为原料进行高水分挤压,并基于熟牛肉的应变率和质构特性对HMTVP原料配方和双螺杆挤压工艺参数进行单因素分析及响应面优化。结果表... 为探究高水分组织化植物蛋白(HMTVP)模拟块状熟牛肉的最佳工艺,以大豆分离蛋白、小麦淀粉、谷朊粉、豆粕为原料进行高水分挤压,并基于熟牛肉的应变率和质构特性对HMTVP原料配方和双螺杆挤压工艺参数进行单因素分析及响应面优化。结果表明:大豆分离蛋白能提升HMTVP的硬度和咀嚼度,淀粉和进水量会降低HMTVP的硬度,喂料量在一定范围能提升HMTVP硬度;在大豆分离蛋白含量32.79%、小麦淀粉含量15.83%、谷朊粉含量24.43%、豆粕含量42.78%,进水量3.4 L/h,喂料量2.8 kg/h条件下,HMTVP的硬度为12.75 kg、咀嚼度为8.27 kg、应变率为0.92×10^(-4),实际水分含量为58.62%,与五级熟度牛肉的质构特性相近;并且在此挤压配方及工艺下制备的HMTVP感官评分较高。HMTVP具有模拟动物肉的巨大潜力,为其在食品工业中的广泛应用提供了有力的参考依据。 展开更多
关键词 高水分组织化植物蛋白 工艺优化 仿牛肉 质构特性 挤压
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谷氨酰胺转氨酶对无麸质高水分组织蛋白品质的影响
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作者 安红周 杨嘉菲 +4 位作者 朱雪庆 孟雪艳 郭益廷 李盘欣 罗琼 《中国粮油学报》 CAS CSCD 北大核心 2024年第7期102-109,共8页
为了提高无麸质高水分组织蛋白的品质特性,本研究将不同梯度含量的谷氨酰胺转氨酶加入大米蛋白与玉米醇溶蛋白混料中进行挤压实验以进行品质改善,并对组织蛋白进行理化特性的测定与分析。高水分组织蛋白中水分的主要存在形式是不易流动... 为了提高无麸质高水分组织蛋白的品质特性,本研究将不同梯度含量的谷氨酰胺转氨酶加入大米蛋白与玉米醇溶蛋白混料中进行挤压实验以进行品质改善,并对组织蛋白进行理化特性的测定与分析。高水分组织蛋白中水分的主要存在形式是不易流动水,低场核磁共振结果表明,谷氨酰胺转氨酶的添加可以促进产品中的结合水转换为不易流动水;随着酶添加量增加,储能模量与损耗模量增大,蛋白结构更趋于稳定。组织蛋白的持水性能与持油性能得到改善,硬度及咀嚼性显著增高(P<0.05),组织化度呈现先增高后降低的趋势,且酶质量分数为0.5%时,产品组织化度达到最大值1.58。谷氨酰胺转氨酶可以显著影响高水分组织蛋白的品质,添加质量分数0.2%~0.5%的谷氨酰胺转氨酶能促进产品形成丰富的纤维结构,使产品具有更好的品质。 展开更多
关键词 高水分组织蛋白 无麸质 谷氨酰胺转氨酶
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雄安新区建筑地基处理实践与探讨
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作者 李启民 熊宏愿 +1 位作者 傅鑫谊 吴泽宗 《建筑技术》 2024年第S01期162-165,共4页
以雄安新区起步区建筑地基处理工程为例,分析了场地的工程地质和水文地质条件,分别介绍了某多层建筑和某高层建筑的地基处理以及基坑支护的设计与施工情况。通过复合地基静荷载试验和单桩静荷载试验,探讨了复合地基承载力和单桩承载力... 以雄安新区起步区建筑地基处理工程为例,分析了场地的工程地质和水文地质条件,分别介绍了某多层建筑和某高层建筑的地基处理以及基坑支护的设计与施工情况。通过复合地基静荷载试验和单桩静荷载试验,探讨了复合地基承载力和单桩承载力。从技术与经济两个方面分析比较了高含水率场地CFG复合地基处理方案与灌注桩基础方案优劣。本研究可为下一阶段雄安新区的全面建设提供理论支持和经验借鉴。 展开更多
关键词 高含水率 CFG桩 复合地基 基坑支护 荷载试验
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不同磷酸盐对高水分挤压前后蛋白流变特性的影响研究
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作者 安红周 全鹏飞 +3 位作者 郭益廷 黄山 李盘欣 黄亚男 《中国粮油学报》 CAS CSCD 北大核心 2024年第9期81-88,共8页
为探究不同磷酸盐对物料在高水分挤压过程中流变行为的影响,进而分析物料中大分子的变性以及结构重新形成的机理,本研究以大豆分离蛋白、谷朊粉、小麦淀粉为原料,考察3种磷酸盐(NaH_(2)PO_(4)、Na_(2)HPO_(4)、Na_(3)PO_(4))对高水分挤... 为探究不同磷酸盐对物料在高水分挤压过程中流变行为的影响,进而分析物料中大分子的变性以及结构重新形成的机理,本研究以大豆分离蛋白、谷朊粉、小麦淀粉为原料,考察3种磷酸盐(NaH_(2)PO_(4)、Na_(2)HPO_(4)、Na_(3)PO_(4))对高水分挤压原料流变学特性以及产品冻干粉流变学特性和粒径的影响。结果显示:3种磷酸盐都提高了原料粉在室温下(25℃)的流动性,其中NaH_(2)PO_(4)提高了样品G′、G″,Na_(2)HPO_(4)、Na_(3)PO_(4)反之。3种磷酸盐都降低了冻干粉在室温下的G′、G″、表观黏度,并减弱了剪切稀化效应,其中Na_(3)PO_(4)大幅提高了样品tanδ值。在温度扫描中,磷酸盐降低了原料粉和冻干粉在受热凝胶化后的结构强度,其中Na_(3)PO_(4)提高了样品在降温阶段的流动性,NaH_(2)PO_(4)、Na_(2)HPO_(4)反之。相应的,Na_(3)PO_(4)使样品的粒径曲线右移,NaH_(2)PO_(4)、Na_(2)HPO_(4)反之。添加磷酸盐能显著影响物料在挤压过程中的流动行为,从而改变挤压产品品质。 展开更多
关键词 磷酸盐 高水分挤压 流变特性 粒径
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体育服饰用超细纤维合成革针刺非织造基布的力学性能表征
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作者 李艳平 周雨龙 《中国皮革》 CAS 2024年第8期98-102,共5页
为有效解决开纤处理后海岛超细纤维针刺非织造基布致密性低且针刺痕迹等一系列问题,以促使其在体育服饰用超细纤维合成革中广泛应用,本文基于针刺法将高收缩聚酯纤维掺入海岛超细纤维合成革非织造基布,以制备生成了超细纤维合成革针刺... 为有效解决开纤处理后海岛超细纤维针刺非织造基布致密性低且针刺痕迹等一系列问题,以促使其在体育服饰用超细纤维合成革中广泛应用,本文基于针刺法将高收缩聚酯纤维掺入海岛超细纤维合成革非织造基布,以制备生成了超细纤维合成革针刺非织造基布,并对其力学性能进行了测试表征。结果发现,随着高收缩聚酯纤维掺入量增加,超细纤维合成革针刺非织造基布断裂强度与撕裂强度皆逐渐增大;透湿性与吸湿性先降低后升高;热收缩率逐步增高;耐磨性逐渐提升,且基布均匀度较好;弯曲长度与弯曲刚度皆逐渐增大,柔软度随之降低;以针刺非织造基布为原料制成的体育服饰用超细纤维合成革表面平整且光滑,底面平整且粗糙度适中,致密性较好,且断裂强度、撕裂强度、透湿性与吸水性均表现优异。 展开更多
关键词 超细纤维合成革 高收缩聚酯纤维 针刺 非织造基布 透湿性
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巴东组泥岩重塑土湿胀特性宏细观跨尺度研究
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作者 赵二平 张聪 +3 位作者 章涵 李森 蒋尚家 车德龙 《铁道建筑》 北大核心 2024年第7期143-148,共6页
针对泥岩地区高速铁路路基上拱问题,以郑万高速铁路沿线巴东组泥岩风化土为研究对象,开展不同初始含水率、干密度、上覆荷载及干湿循环次数条件下泥岩重塑土湿胀特性宏细观试验。基于多因素从宏细观角度对泥岩膨胀性进行了试验验证,对... 针对泥岩地区高速铁路路基上拱问题,以郑万高速铁路沿线巴东组泥岩风化土为研究对象,开展不同初始含水率、干密度、上覆荷载及干湿循环次数条件下泥岩重塑土湿胀特性宏细观试验。基于多因素从宏细观角度对泥岩膨胀性进行了试验验证,对维护膨胀土区域工程稳定性有一定借鉴作用。结果表明:泥岩重塑土无荷膨胀率随着初始含水率的增加线性减小,随着初始干密度的增加呈指数增长;上覆荷载作用抑制了泥岩重塑土的膨胀变形;干湿循环作用下,泥岩重塑土膨胀率及吸水量均随干湿循环次数的增多而总体上先增加后减小,强度劣化,泥岩内部结构由致密变为疏松,矿物颗粒吸水膨胀,试样内部大尺寸孔隙逐渐形成。 展开更多
关键词 高速铁路路基 泥岩 重塑土 干湿循环 湿胀特性 分形维数
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超细颗粒悬浮状疏浚土真空预压加固特性研究
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作者 胡小波 《水运工程》 2024年第6期204-210,共7页
浙江省乐清湾地区疏浚土具有高孔隙比、高黏粒含量、高含水率、高触变性、抗剪强度低及排水缓慢的特性,工程性质差,加固困难。依托乐清湾北港区吹填区真空预压工程,设置4个3000 m^(2)的真空预压试验区,研究相同真空度下不同塑料排水板... 浙江省乐清湾地区疏浚土具有高孔隙比、高黏粒含量、高含水率、高触变性、抗剪强度低及排水缓慢的特性,工程性质差,加固困难。依托乐清湾北港区吹填区真空预压工程,设置4个3000 m^(2)的真空预压试验区,研究相同真空度下不同塑料排水板间距、型号加固效果的差异,通过膜下真空度、表层沉降、孔隙水压力等监测数据以及土体含水率、十字板抗剪强度的检测结果对加固效果进行分析,同时结合含水率、十字板抗剪强度等检测数据,对无结构疏浚土的物理力学指标离散性进行分析。结果表明,采用真空预压加固超细颗粒无结构疏浚土时,对于浅层加固,A与B型排水板没有明显差别,塑料排水板间距小于100 cm时加固效果提升不明显;无结构疏浚土加固后力学指标较离散而含水率指标较稳定,建议采用含水率作为验收指标;建议无结构疏浚土采用土的三相组成推算其压缩比和沉降量。 展开更多
关键词 高含水率 强度变异 疏浚土 真空预压
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高水分组织化植物蛋白的拆丝工艺优化及其力学指标相关性研究
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作者 安红周 马润豪 +3 位作者 杜艳 薛义博 李盘欣 黄亚男 《河南工业大学学报(自然科学版)》 北大核心 2024年第6期28-36,共9页
为了探索组织蛋白的品质评价方法与反映纤维强弱的力学指标,采用食品搅拌机对高水分组织化植物蛋白进行拆丝处理。首先借助单因素试验探究食品搅拌机的拆丝时间、刀具转速和刀刃宽度对高水分组织化植物蛋白纤维断裂强度的影响;在此基础... 为了探索组织蛋白的品质评价方法与反映纤维强弱的力学指标,采用食品搅拌机对高水分组织化植物蛋白进行拆丝处理。首先借助单因素试验探究食品搅拌机的拆丝时间、刀具转速和刀刃宽度对高水分组织化植物蛋白纤维断裂强度的影响;在此基础上,利用响应面试验优化高水分组织化植物蛋白的拆丝工艺;使用优化后的拆丝工艺对不同淀粉含量的高水分组织化植物蛋白进行拆丝,测量其纤维断裂强度、拉伸特性、组织化度和质构特性等力学指标,并进行相关性分析。试验结果表明:当拆丝时间为240 s、刀具转速为10500 r/min、刀刃宽度为30 mm(搓粉模头)时,拆丝效果最好,纤维最为纤细,此时纤维断裂强度为0.70 N,与预测值0.70 N一致;相关性分析表明纤维断裂强度与拉伸特性、组织化度和质构特性都呈极显著负相关。优化后的拆丝工艺具有普适性,且纤维断裂强度作为一种力学指标可以表示高水分组织化植物蛋白纤维的强弱。 展开更多
关键词 高水分组织化植物蛋白 拆丝工艺 力学特性 纤维断裂强度
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高水分小麦热风干燥后品质的变化 被引量:2
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作者 樊梦珂 陈鹏枭 +5 位作者 刘烨 朱文学 蒋萌蒙 张玉荣 王晓弯 吴建章 《食品与机械》 CSCD 北大核心 2024年第2期139-145,191,共8页
目的:研究干燥工艺对高水分小麦品质的影响。方法:从外观品质、营养品质、加工品质3个维度探究不同干燥工艺下小麦品质变化规律。选取色泽、湿面筋含量、干燥速率3个指标作为响应值,结合响应面分析方法预测高水分小麦的最佳干燥工艺。结... 目的:研究干燥工艺对高水分小麦品质的影响。方法:从外观品质、营养品质、加工品质3个维度探究不同干燥工艺下小麦品质变化规律。选取色泽、湿面筋含量、干燥速率3个指标作为响应值,结合响应面分析方法预测高水分小麦的最佳干燥工艺。结果:干燥温度是主要的影响因素。随着干燥温度的升高,小麦色泽加深,粗蛋白含量和湿面筋含量下降,面团的吸水率、形成时间及稳定时间上升,弱化度下降,粉质指数上升,小麦表皮由凸起的小矩形变为凹陷的小坑状,内部淀粉颗粒由光滑的圆形或椭圆形变为粗糙的不规则状。高水分小麦的最佳干燥工艺条件为干燥温度45℃,风速0.94 m/s,缓苏时间30.4 min,此时色泽L*值为58.811、湿面筋含量为27.292%,干燥速率为8.146×10^(-2)%/min,综合评分为0.613。结论:热风干燥工艺的优化在保证干燥效率的基础上一定程度改善了小麦干燥后的品质。 展开更多
关键词 高水分小麦 热风干燥 干燥效率
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添加蔗糖对高水分苜蓿青贮中真菌菌群多样性的影响 被引量:1
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作者 李荣荣 胡明 +1 位作者 魏睿 徐春城 《中国草地学报》 CSCD 北大核心 2024年第1期143-148,共6页
通过宏基因组测序研究了高水分苜蓿单独青贮(对照组)和添加蔗糖(蔗糖组)青贮中真菌菌群多样性。结果表明:与对照组相比,蔗糖添加剂显著增加了乳酸含量(P<0.05),显著降低了乙酸、丁酸和氨态氮含量以及好氧细菌数量(P<0.05)。子囊... 通过宏基因组测序研究了高水分苜蓿单独青贮(对照组)和添加蔗糖(蔗糖组)青贮中真菌菌群多样性。结果表明:与对照组相比,蔗糖添加剂显著增加了乳酸含量(P<0.05),显著降低了乙酸、丁酸和氨态氮含量以及好氧细菌数量(P<0.05)。子囊菌门是苜蓿原料和两组青贮中相对丰度最大的真菌门,担子菌门次之;莫氏黑粉菌属和链格孢属是苜蓿原料上的优势真菌属,而白僵菌属是两组青贮中最丰富的属,曲霉属和青霉属的相对丰度较低。与对照组相比,蔗糖组中白僵菌属、曲霉属和青霉属的相对丰度分别下降了24.59%、1.49%和0.22%。南极莫氏黑粉菌和互隔交链孢霉是苜蓿原料上最丰富的真菌种,而球孢白僵菌主导两组青贮中真菌菌群,黄曲霉相对丰度较低。球孢白僵菌和黄曲霉的相对丰度与乳酸含量呈反比,与氨态氮、丁酸和乙酸含量成正比。综上所述,蔗糖添加剂组发酵品质良好,南极莫氏黑粉菌主导苜蓿原料上的真菌菌群,而球孢白僵菌主导高水分青贮中真菌菌群,添加蔗糖能够在一定程度上抑制球孢白僵菌的繁殖。 展开更多
关键词 宏基因组 高水分 苜蓿青贮 真菌菌群 多样性
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植物蛋白复配对植物肉品质的影响 被引量:1
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作者 尹思睿 冯娇 +1 位作者 杨晓宇 李良 《轻工学报》 CAS 北大核心 2024年第5期18-28,共11页
以大豆分离蛋白(SPI)、豌豆蛋白(PP)和鹰嘴豆蛋白(CP)为主要基料,谷朊粉(WG)为辅料,研究不同植物蛋白复配及配比对植物肉品质特性(感官评分、质构特性、组织化度和微观结构)的影响。结果表明:WG的添加会影响植物肉的感官评分,对于SPI基... 以大豆分离蛋白(SPI)、豌豆蛋白(PP)和鹰嘴豆蛋白(CP)为主要基料,谷朊粉(WG)为辅料,研究不同植物蛋白复配及配比对植物肉品质特性(感官评分、质构特性、组织化度和微观结构)的影响。结果表明:WG的添加会影响植物肉的感官评分,对于SPI基植物肉,当WG质量分数为40%时,植物肉的感官评分最高((68.68±0.85)分),对于SPI/WG体系,PP的添加会增加植物肉的硬度,CP的添加则会降低植物肉的组织化度;对于PP基植物肉,当WG质量分数为10%时,植物肉的感官评分最高((75.80±0.76)分),对于PP/WG体系,随着SPI或CP质量分数的增加,植物肉的组织化度下降;对于CP基植物肉,当WG质量分数为30%时,植物肉的感官评分最高((73.60±0.42)分),对于CP/WG体系,PP或SPI的添加可显著降低植物肉的硬度;三元蛋白复配植物肉中,PP/CP/WG(80∶10∶10)共混体系植物肉的感官评分((77.30±0.57)分)、硬度((25.78±0.61)kg)和咀嚼度((4.66±0.16)kg)均最高。因此,复配不同植物蛋白是改善植物肉纤维结构和组织化的有效方法。 展开更多
关键词 植物蛋白 植物肉 高水分挤压 品质特性
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谷朊粉对豌豆植物蛋白肉产品特性的影响 被引量:2
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作者 赵玉茹 杨进洁 +2 位作者 边文洁 赵祥忠 王晨莹 《食品研究与开发》 CAS 2024年第2期1-6,共6页
以豌豆蛋白为原料,添加不同比例的谷朊粉,在相同条件下采用高水分(60%~80%)挤压技术制备植物蛋白肉,研究不同谷朊粉含量对产品理化性质和结构特性的影响。结果表明,随着谷朊粉含量的增加,植物蛋白肉的硬度和咀嚼度先升高后降低,弹性显... 以豌豆蛋白为原料,添加不同比例的谷朊粉,在相同条件下采用高水分(60%~80%)挤压技术制备植物蛋白肉,研究不同谷朊粉含量对产品理化性质和结构特性的影响。结果表明,随着谷朊粉含量的增加,植物蛋白肉的硬度和咀嚼度先升高后降低,弹性显著升高(P<0.05),颜色逐渐变浅,溶液的黏度增加。植物蛋白肉的复水率随着谷朊粉的增加先升高后降低,内部孔隙数量明显增加且分布变得均匀。谷朊粉的加入使植物蛋白肉的二级结构含量发生变化,无规则卷曲向β-折叠进行转化,有序结构的含量先增加后减少。综上,谷朊粉的加入能够显著改善植物蛋白肉的理化性质和结构特性,改善拉丝效果及纤维结构,提高与真肉的类似度。 展开更多
关键词 豌豆蛋白 谷朊粉 高水分挤压 植物蛋白肉 纤维结构
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