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Search Results: 1 - 10 of 38739 matches for " 袁嘉琪 "
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三门核电厂氢气风险控制措施研究
Hydrogen Risk Control Measures for Sanmen NPP
 [PDF]


Nuclear Science and Technology (NST) , 2014, DOI: 10.12677/NST.2014.23009
Abstract:

安全壳冷却失效导致严重事故后安全壳处于严重威胁状态,超压风险和氢气风险并存。结合电厂严重事故管理导则,研究安全壳严重威胁状态下的氢气风险控制。根据严重事故管理导则在安全壳严重威胁状态下执行SCG-2“恢复安全壳冷却”和SCG-3“控制安全壳氢气风险”中的严重事故管理措施。研究发现在降低安全壳压力的同时破坏了安全壳内的惰化环境,导致较高的氢气风险,如不采取减少氢气装量的措施,则无法真正消除氢气风险。
 Failure of containment cooling induces inert containment environment after initial event and results in coexistence of containment overpressure challenge and hydrogen challenge, which is a containment severe challenge status. After Fukushima accident, assessment of hydrogen risk under containment severe challenge status according to Sanmen SAMG in operation is needed. Effect of SCG-2 and SCG-3 from SAMG is investigated; the result shows that establishing of containment cooling does depressurize the containment but steam inert is break and high hydrogen risk is observed. The preferred means in SAMG does not reduce hydrogen inventory, and thus do not mitigate hydrogen risk fundamentally.

新疆托里蛇绿岩型金矿床中黄铁矿的研究
甘源明,周美付,冯延玲,戎合,
地球学报 , 1987,
Abstract: 在金的伴生矿物中,黄铁矿在托里金矿床中是非常丰富的矿物。它不仅在数量上占优势,而且在本矿床中黄铁矿还以部分自然金的载体出现在矿化带中,所以对黄铁矿进行较为详细的研究是有实际意义的。另外,本矿床为一新型的金矿床——蛇绿岩型金矿,就其黄铁矿来说,无论是矿物学的特点或是地球化学特点都具有本类型矿床的独特性质,例如本黄铁矿中有CO/Ni<1、Au/Ag>1的特点。再者,托里金矿有两个成矿带,而黄铁矿在这两个成矿带中又有不同的特点,这是由于这两个成矿带不同的成矿环境所造成的。
干旱地区高耐盐植物国际会议简报

植物生态学报 植物生态学报 , 1991,
Abstract:
危害橡胶木的真菌和昆虫

林业科学研究 , 2001,
Abstract: 橡胶树[Hevea brasiliensis(H.B.K)Muell-Arg.]是一种具有很高经济价值的树种,全世界99%的天然橡胶是由它生产出来的。橡胶树原产于南美洲亚马逊河流域的热带丛林,Wickham1876年首次将它引入远东地区,随着引种栽培技术的不断进步,目前世界许多热带地区都有它的分布。橡胶树的经济价值不仅仅在于它基本保障了世界天然橡胶的市场供应,而且由于橡胶木自身具有颜色纹理美观、易于加工、供应充足且价格相对低廉等特点,近20多年来,橡胶木加工业发展迅速。国外新近研究选育出的橡胶树品系具有良好的第二特性,适于木材生产和加工,它们的更新期有些从过去的25~35a缩短到15~20a,在重视环保问题的今天,橡胶木的利用越来越受到青睐。
传播的人群生态动力学模型

生态学报 , 2006,
Abstract: 研究了hiv传播的动力学模型,描述了流行性传染病区域的人群传播规律,特别是利用摄动理论对艾滋病的传播动力学非线性方程作了定量、定性的讨论。
木材生物防腐研究的现状与展望

世界林业研究 , 2004,
Abstract: 介绍了木材生物防腐的基本概念及其应用现状,并对其今后的研究与应用技术的开发前景进行了展望.
烹饪方法对兔排油脂氧化和挥发性呈味物的作用研究

- , 2015, DOI: 10.13982/j.mfst.1673-9078.2015.10.041
Abstract: 本文对比研究了煎、炸、微波和烤4种中式烹饪方式处理的兔排脂质氧化程度和挥发性呈味物的异同与联系。烹饪导致兔排油脂氧化,以微波和烤制样品的TBARs值升高最为显著(P<0.05),分别达到1.31 mg MDA/kg样品和1.23 mg MDA/kg样品。烹制兔排样品中共检测出56种挥发性化合物,不同烹制方式导致兔排中各挥发性化合物含量存在一定差异;烤兔排的总挥发性化合物含量最高。新鲜兔排挥发性化合物的主成分是酯类,而醛类是烹饪样品中挥发性化合物的主成分,在煎制、油炸、微波和烤制兔排样品中醛类化合物分别占据总挥发性化合物的54.31%、53.21%、59.99%和65.19%。兔排油脂氧化指数TBARs值与挥发性化合物中总酯类含量呈线性负向相关,与总醛类、总呋喃类及总挥发性化合物含量呈正相关,其中与己醛的相关系数高达0.793,说明油脂氧化产物是烹制兔排挥发性化合物的主成分物来源。
Rabbit chops were treated by four different cooking methods: shallow-frying, deep-frying, microwaving, and roasting. The lipid oxidation and volatile compound profiles of the cooked chops were compared. The lipid oxidation caused by cooking of rabbit chops was the most significant after microwaving and roasting (P < 0.05), as measured by thiobarbituric acid reactive substance assay (TBARS) to quantify malondialdehyde (MDA). The TBARS values were 1.31 mg MDA/kg sample and 1.23 mg MDA/kg sample, respectively. A total of 56 volatile compounds were detected in the cooked rabbit chops. The amounts of the volatile compounds varied in rabbit chops cooked by different methods. The roasted rabbit chops had the highest total volatile compound content. The dominant volatile compounds in fresh rabbit chops were esters, while the main volatile compound in cooked rabbit chops was aldehyde. The percentages of aldehydes in all volatile compounds after shallow-frying, deep-frying, microwaving, and roasting were 54.31%, 53.21%, 59.99% and 65.19%, respectively. The lipid oxidation index, thiobarbituric acid reactive substance value, and the total ester content showed a negative correlation, while the contents of total aldehydes, total furans, and total volatile compounds showed positive correlation. The correlation coefficient with aldehyde was 0.793. These results indicate that the lipid oxidation products were the main contents of volatile compounds in cooked rabbit chops.
基于EOF的雅鲁藏布江流域干湿季降水变化的时空分异研究
Analyzing Spatial and Temporal Distribution of Precipitation at Wet or Dry Season in Yarlung Zangbo River Basin Using Empirical Orthogonal Function
 [PDF]

王熊飞, 陈思思,
Open Journal of Soil and Water Conservation (OJSWC) , 2014, DOI: 10.12677/OJSWC.2014.24004
Abstract:
根据2000年~2010年雅鲁藏布江流域的15个气象站点的月值降水数据,采用经验正交函数分解法(EOF),分别计算出雅鲁藏布江流域干湿季降水的时空分布特征和时间系数序列。结果表明:应用EOF方法可以很好地揭示降水场的时空分布特征,且对雅鲁藏布江流域而言前4种模态揭示了四种分布场,干季降水的累计贡献率达99.84%,湿季降水的累计贡献率达89.81%。雅鲁藏布江流域干湿季降水的主要空间分布特征是“东–西差异分布”,即表现出西部偏少东部偏多的特点,尤其是在喜马拉雅山脉最东端的米林宽谷地带降水最为丰富,分析其原因是季风气候和印度洋的暖湿气流对东部影响较大,西部由于海拔高,水汽很难到达,因此西部降水较东部少。
According to the monthly precipitation data of 15 meteorological stations in the Yarlung Zangbo river basin during the period from 2000 to 2010, and using the method of empirical orthogonal function (EOF), we respectively calculated the spatial and temporal distribution characteristics of precipitation in wet and dry season and the time-coefficient series. The results showed that the EOF method was capable of revealing the spatial and temporal distributions of precipitation field for the Yarlung Zangbo river basin, with the first four EOFs reflecting the four vector distribution fields; furthermore, we can know that the cumulative contribution rate of precipitation is 99.84% at dry season and 89.81% at wet season. The main space distribution characteristic of dry or wet season precipitation is different distribution from west to east in Yarlung Zangbo river valley. It shows that the precipitation in western district is more than that in eastern district, such as Milin wide valley in the eastern end of Himalayas, which is one of most abundant precipitation areas, because it is influenced by the monsoon climate and the warm moist air flow from the eastern Indian Ocean. However, due to the high altitude, the water vapor is hard to reach the west area. So the precipitation of west area is relatively less compared to the east.
新型眼部给药系统及其体内外评价方法的研究进展
Research Progress of a New Ocular Drug Delivery System and Its in Vivo and in Vitro Evaluation Methods
 [PDF]

, 易芳莲, 栾立标
Pharmacy Information (PI) , 2016, DOI: 10.12677/PI.2016.53009
Abstract:
目的:介绍眼部给药系统及其体内评价方法的进展。结果:通过查阅总结近年来眼部给药系统及其体内评价方法的国内外文献报道,总结发现近年来新型眼部给药系统有凝胶系统、胶粒系统、环糊精包合物等,其体外评价方法主要为体外释放实验,其体内评价方法主要包括眼部滞留时间和药动学研究。结论:新型眼部给药系统及其体内外评价方法都有较大的进展,虽然还存在一定的不足,但均具有很好的发展前景。
Purpose: The purpose is to introduce the progress of ocular drug delivery system and its in vivo and in vitro evaluation methods. Results: Through looking up and summarizing the domestic and foreign literature about ocular drug delivery system in recent years, we find that new ocular drug delivery system is usually about gel system, colloidal particle system, entrapped cyclodextrin complex, etc. Its in vitro evaluation method is mainly in vitro drug release experiment, and the in vivo evaluation methods mainly include ocular residence time and pharmacokinetic study. Conclusion: New type of ocular drug delivery system and its in vivo and in vitro evaluation method are improved. Though there is a certain amount of shortage, they have a very good development prospect.
民勤土地利用格局时空变化研究
, 石培基
中国沙漠 , 2013, DOI: 10.7522/j.issn.1000-694X.2013.00130
Abstract: 应用1987年和2010年两期TM遥感数据,在GIS技术的支撑下,解译提取民勤县土地利用类型空间分布信息,用FRAGSTATS3.3软件计算斑块类型和景观两个层次的7个景观格局指数,分析民勤县土地利用类型空间转化特点和质心转移趋势。结果表明:(1)23年间,民勤县土地利用类型转换明显,戈壁、耕地面积增加,草地面积减少,林地部分退化。(2)土地类型多样性和均匀度减小、聚集度增加,表明人类活动对民勤县土地利用影响大,土地利用结构受个别土地类型影响程度加深、稳定性下降。(3)民勤县土地利用质心整体向西南方向偏移,沙漠、耕地质心向西南方向偏移明显,沙进人退的趋势显著。
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