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基于Hoek-Brown强度折减法的边坡稳定性图表法研究
边坡工程 岩质边坡 安全系数 强度折减 Hoek-Brown准则 稳定性图表
2018/4/23
边坡稳定性图表为初步评价边坡的稳定性提供一种简单但却行之有效的途径。采用Hoek-Brown有限元强度折减法，提出一套求解Hoek-Brown准则下岩质边坡安全系数的稳定性图表。首先根据Hoek-Brown准则下岩体的正应力与剪切应力的关系，推导关于瞬时内摩擦角 和瞬时黏聚力 的一种显示表达公式，进而实现基于Hoek-Brown准则的有限元强度折减法在数值计算中的实施。算例分析表明，该方法获得的边...
改进的Hoek-Brown准则可以降低高围压下HB准则过高预测岩石三轴强度的偏差值。然而，该准则在实际应用中仍然存在局限：通过应用大量岩石三轴试验数据验证了该准则中岩石临界状态围压等于单轴抗压强度这个观点并不具有普适性，并得出该准则在围压高于岩石单轴抗压强度时对其预测的三轴强度与试验强度存在较大的偏差，而且该偏差随着围压的增大而增加。为克服改进的HB准则这个应用局限，通过应用岩石临界状态及岩石临界...
Tea catechin and caffeine activate brown adipose tissue and increase cold-induced thermogenic capacity in humans
catechin brown adipose tissue energy expenditure old-induced thermogenesis healthy humans
2018/11/13
Background: The thermogenic effects of green tea catechin have been repeatedly reported, but their mechanisms are poorly understood.
为克服基于Hoek-Brown强度准则的屈服面数值奇异问题，提出新的棱角处屈服面圆化方法，在此基础上，借助ABAQUS二次开发平台，采用FORTRAN语言编制理想弹塑性模型子程序，应力更新算法为完全隐式的向后欧拉积分算法； 提出基于Hoek-Brown准则的有限元强度折减技术，并将其嵌入到圆化后的屈服函数中，探讨了强度折减技术应用于Mohr-Coulomb强度准则和Hoek-Brown非线性强度准...
Extraction, Fractionation, and Chemical Characterisation of Fucoidans from the Brown Seaweed Sargassum pallidum
brown seaweed Sargassum pallidum fucoidan extraction cytotoxic activity
2016/12/9
The fucoidans were obtained by extraction with water and gradient precipitation with different concentrations of ethanol. The main structural characterisations and bioactivities were achieved. Four fr...
Hoek-Brown强度准则在岩石及岩体工程中得到了广泛的应用,而目前基于该准则建立起的弹塑性本构模型在理论上还存在着一些不足;考虑到不同围压条件下的岩石材料塑性形变发展特征,提出了基于分段隐式修正塑性势的塑性流动法则,解决了其它基于广义H-B准则所建立的本构模型中塑性流动方向不连续及需额外引入参数等问题;采用基于误差控制的改进欧拉中点积分算法,对该本构模型进行了数值实现并给出了单积分点层次的结果...
Using Basalt Flour and Brown Algae to Improve Biological Properties of Soil Contaminated with Cadmium
cadmium fertilizing substances microorganisms
2015/7/28
In order to achieve homeostasis of soil, the potential of alleviating substances (two innovative: basalt flour and
brown algae extract against two classic compounds: barley straw and compost) were a...
Diffusion Tensor Tractography Demonstration of Partially Injured Spinal Cord Tracts in a Patient with Posttraumatic Brown Sequard Syndrome
Diffusion tractography Spinal trauma Magnetic resonance imaging
2015/7/10
Diffusion tractography is a new imaging technique to display the traumatic region for valuable preoperative information with prognostic significance. We present a case of 54 year male with quadripares...
Color naming and sunlight:Commentary on Lindsey and Brown (2002)
Color naming and sunlight Lindsey Brown
2015/6/24
Lindsey and Brown (2002) (L&B) propose an intriguing explanation for the existence and geographical distribution of languages that lack a distinct word for the color blue. Many such languages include ...
Evaluation of semen quality of endangered Caspian brown trout (Salmo trutta caspius) in different times of spermiation during the spawning season
sperm motility spermiation spawning season Caspian brown trout
2015/6/8
Sperm motility and sperm production as well as organic and inorganic components present in the seminal plasma were measured at different time periods of spermiation during the spawning season in order...
A comparison of Holstein Friesian, Brown Swiss and Eastern Anatolian Red cattle slaughtered in Turkey for carcass conformation and fatness in SEUROP system
SEUROP classification conformation fleshiness
2015/6/5
The study was conducted to compare the carcass conformation and fatness of common slaughter cattle breeds in Turkey. A total of 878 carcasses from pure Holstein Friesian (HF, n = 381), pure Brown Swis...
Carcass and meat quality in Brown fattened young bulls: effect of rearing method and slaughter weight
Brown cattle carcass composition meat colour sensory evaluation
2015/6/2
Three groups of Brown fattened young bulls were studied, comparing the effects of rearing method (suckled vs. bucket reared) and of slaughter weight (400 vs. 480 kg). Suckled animals had higher fatnes...
Effects of Supplementing Brown Seaweed By-products in the Diet of Holstein Cows during Transition on Ruminal Fermentation, Growth Performance and Endocrine Responses
Brown Seaweed By-products Growth Performance Fermentation Blood metabolites Holstein Cows
2016/5/18
This study was conducted to examine the effects of supplementing brown seaweed by-products (BSB) in the diet of ruminants on ruminal fermentation characteristics, growth performance, endocrine respons...
Effect of γ-Aminobutyric Acid-producing Lactobacillus Strain on Laying Performance, Egg Quality and Serum Enzyme Activity in Hy-Line Brown Hens under Heat Stress
γ-Aminobutyric Acid Lactobacillus Heat Stress Laying Performance Egg Quality
2016/5/18
Heat-stress remains a costly issue for animal production, especially for poultry as they lack sweat glands, and alleviating heat-stress is necessary for ensuring animal production in hot environment. ...
Parasite load of European brown hares in Austria and the Czech Republic
Lepus europaeus gastrointestinal parasites lungworms coccidia body weight
2015/4/15
The parasite load of brown hares (Lepus europaeus) is of great interest to hunting ground managers and veterinarians. We compared the prevalence and intensity of parasitic infections in 362 hares from...