Results 11 to 20 of about 606 (139)
Advanced characterization of coal microstructure before and after liquid nitrogen cold soaking [PDF]
, 2023 With the development of coal seam fracturing technology, promote the gas extraction by liquid nitrogen cold soaking fracturing coal has attracted widespread attention. In order to study the effect of liquid nitrogen cold soaking on the microstructures of
Dengke WANG, Shumin LIU, Xuelong LI
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Shuitu Baochi Xuebao, 2021 为揭示冻融循环作用对棕壤抗剪强度的影响，采集沈阳地区5 cm和25 cm 2个深度原状棕壤（分别为H5和H25）为研究对象，通过室内冻融循环模拟和土壤直剪试验，研究冻融循环次数和土壤含水率对土壤抗剪强度的影响。结果表明：（1）土样含水率越高，初次冻融作用的破坏效果越强，1次冻融循环后，含水率为25%的H5和H25土样黏聚力分别下降50.00%和25.87%；含水率35%的H5和H25土样黏聚力分别下降75.61%和50.77%。15次冻融循环后，含水率10%的H5和H25土样黏聚力分别增加74.36 ...
朱龙祥 +5 more
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Effect of L-Arginine or L-Lysine on the Quality of Duck Meat Patties during Freeze-thaw Cycles [PDF]
In this study, the effects of L-arginine or L-lysine on the quality of duck meat patties during repeated freeze-thaw cycles were studied to provide a theoretical basis for the application of L-arginine or L-lysine as cryoprotectant in meat products.
Mengmeng LI, Shufeng HE, Yangying SUN
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Shuitu Baochi Xuebao, 2020 冻融是影响高寒地区土壤结构的重要物理因素，以青海湖流域高寒草甸作为研究对象，通过野外采集原状土柱、室内冻融循环模拟、CT扫描和图像解译等方法，研究冻融循环对高寒草甸冻胀丘和丘间地的土壤大孔隙结构特征的影响。结果表明，随着冻融循环次数的增加，高寒草甸冻胀丘和丘间地土壤大孔隙度均呈现"减小—增加—减小"的趋势，冻融循环对土壤大孔隙度的降低主要在第1次冻融循环内形成的，且大孔隙的平均等效直径、平均体积、平均分枝长度、分枝密度和节点密度的变化规律与大孔隙度变化规律基本一致 ...
赵云朵, 胡霞
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Shuitu Baochi Xuebao, 2021 为了探明冻融过程对东北典型黑土耕层氮（N）生物有效性的影响，试验利用室内模拟方法，探究了不同冻结温度、土壤容重、含水量、冻融循环次数影响下耕层土壤剖面速效氮（AN）的时空分布规律。结果表明，经冻融循环后，土壤AN含量随土层深度增加呈现波动性下降；冻结温度越低，AN随土层深度增加下降的波动性越大，AN峰值、AN土柱平均值越低；冻结温度-15℃时整个土柱AN平均值比-10℃降低9.3%~44.6%；容重增高，AN含量降低，AN/TN值升高，土壤容重1.1 g/cm3时整个土柱AN平均值比容重1.0 g ...
谷际岐 +6 more
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Effect of Freezing-thawing Cycle on the Quality of Prefabricated Mushroom Soup [PDF]
To investigate the influence of freezing-thawing cycle on the quality of prefabricated mushroom soup, the differences in the basic indicators of mushroom soup including microbial quantity, color, soluble protein, reducing sugar, and total phenolic ...
De YANG, Qi LU, Shujing XUE
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Dispersivity of modified polyester fibers in concrete and its influence on the durability of concrete [PDF]
, 2016 Modified polyester fiber reinforced concrete with different additions was prepared. The dispersivity of modified polyester fibers in concrete by five different mixing methods was studied by an image processing method.
CHEN Jian-qiang +3 more
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, 2019 在季节性冻土地区,沥青路面反复经历冻融循环作用,极易出现开裂、坑槽、拥包等病害,其中以横向开裂最为显著。沥青的黏弹性能和骨料的级配特征是影响沥青混合料抗冻融能力的关键因素。目前,大量研究集中在沥青低温性能评价和沥青混合料低温性能研究方面,忽视了骨料级配在冻融前后的差异。该文通过现场调查和室内试验,分析了骨料级配与沥青混合料开裂情况的相关性。研究结果表明:在沥青满足设计要求的情况下,粗集料含量越少(级配曲线越靠近上限值),沥青路面的低温开裂越严重 ...
侯亚丽, 林铭彬, 马宏岩
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Study on energy dynamic change law in the process of water-contained coal caused by liquid nitrogen freezing [PDF]
, 2023 To study the energy dynamic change law of moisture-contained coal in the process of liquid nitrogen freezing, a self-developed acoustic emission (AE) experimental system for the whole process of liquid nitrogen frozen coal was utilized to analyze the ...
Botao LI +6 more
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TACE with Ar-He Cryosurgery Combined Minimal Invasive Technique for the Treatment of Primary NSCLC in 139 Cases [PDF]
, 2010 Background and objective TACE, Ar-He target cryosurgery and radioactive seeds implantation are the mainly micro-invasive methods in the treatment of lung cancer.
Dongmei LI +5 more
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