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Search Results: 1 - 10 of 80379 matches for " 朱彦菲 "
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新疆铁克里克西段都维吐卫岩体年代学、岩石地球化学特征及地质意义
刘鑫,志新,,李平,靳刘圆,陈邦学
西北地质 , 2015,
Abstract: 出露于新疆塔里木南缘铁克里克地区西段的都维吐卫花岗岩体, 侵入赫罗斯坦岩群(Pt1H)黑云二长片麻岩中, 与库浪那古岩群(Pt2K)和大同西岩体呈断层接触, 东部多被博查特塔格组(Jxbc)不整合覆盖。通过地球化学分析, 显示岩体具高Si、高Al、高K, 贫Na、低Ga、低P、低Ti和贫Mg的特征, 铝饱和指数(A/CNK)为1.38~1.43, CIPW标准刚玉分子大于1%, 属高钾钙碱性过铝质花岗岩。在稀土元素方面显示, 轻稀土元素(LREE)富集、重稀土元素(HREE)亏损, 轻重稀土元素分馏明显, Eu出现中等负异常(δEu=0.59~0.82);在微量元素方面, 明显富集大离子亲石元素Rb、Ba、Th和K, 亏损高场强元素Nb、Ta、Ti。岩体LA-ICP-MS锆石U-Pb同位素定年获得年龄为(1 909±47)Ma, 属于古元古代花岗岩。综合分析认为该岩体是造山晚期-同碰撞环境下形成的, 与加厚地壳引起的地壳重熔有关, 推断西昆仑造山带强烈的陆内造山活动应在古元古代已经开始了;结合赫罗斯坦岩群(Pt1H)中角闪斜长片麻岩中锆石年龄记录, 推断2 000~1 800Ma塔里木陆块存在Columbia超大陆聚合事件。
塔里木西南缘高Ba-Sr花岗岩体的地球化学特征及地质意义
李平,志新,,靳刘圆
地质论评 , 2015,
Abstract:
响应面优化3-AT-R树脂的制备及对水中汞离子的吸附 Optimization of 3-AT-R Resin Preparation via Response Surface Methodology and its Mercury Ion Adsorption in Water
熊春华,蔡晓敏,徐银荣,敏亮,吴舒怡,饶明,
- , 2018,
Abstract: 通过响应面分析法优化制备螯合树脂,提高其转化率,探究反应条件之间的交互作用。将螯合树脂作为吸附材料对水中汞离子进行实验研究,考察吸附pH、共存离子、吸附温度对饱和吸附容量的影响,利用红外光谱(FTIR)和热重分析仪(TGA)进行表征。研究表明螯合树脂对汞离子的最佳吸附pH=6.0,308 K下饱和吸附量为382.5 mg·g-1。吸附为化学吸附,过程遵循二级动力学模型。2 mol·L-1盐酸溶液进行解吸,解吸率达到100%。吸附和解吸实验表明3-AT-R螯合树脂对汞离子的吸附具有高选择性、高吸附性、高洗脱率。
东昆仑西段巴什康阔勒辉长岩地球化学特征及其构造意义
Geochemical Characteristics and Tectonic Significance of Gabbro from Bashikangkuole in West Part of Eastern Kunlun,China

郑勇,杨有生,陈邦学,
ZHENG Yong
,YANG Yousheng,CHEN Bangxue,ZHU Yanfei

- , 2016,
Abstract: 摘要: 通过主微量元素特征研究,MgO、FeO含量分别介于 578%~123%和516%~104%,Al2O3含量介于142%~2156%,整体含量较高。TiO2含量相对较高,介于018%~132%,平均为077%,与岛弧拉斑玄武岩的084%较为接近,K2O含量偏低,介于005%~053%,平均为02%,与洋中脊拉斑玄武岩02%一致;轻稀土元素富集,重稀土元素亏损;富集大离子亲石元素(K除外),高场强元素Ti、P等轻微富集,而Nb、Zr亏损,结合构造环境判别认为形成环境为弧后盆地。利用锆石UPb测年,获得两组年龄,其中上交点206Pb/238U表面年龄加权平均值(501±1) Ma(MSWD=025),为寒武世晚期,代表原岩结晶年龄;下交点206Pb/238U表面年龄加权平均值(451±2) Ma(MSWD=0084),为晚奥陶世早期,代表变质年龄。结合主量和微量元素特征、构造环境以及同位素年龄,认为洋壳俯冲始于晚寒武世之前,且在晚奥陶世已开始发生碰撞。
Abstract: Major and trace element analysis were conducted in this study. The rocks have MgO contents between 578% and 123%, FeO contents between 516% and 104%, Al2O3 contents between 142% and 2156%, which is relatively high in all. The TiO2 contents of the samples range from 018% to 132% (average=077%), which is relatively high and similar to those of the island arc tholeiitic basalts (TiO2=084%). However, the rocks show relatively low contents of K2O (005%-053% with an average of 02%), consistent with those of the ocean ridge tholeiitic basalt (K2O=02%). The REE patterns are characterized by an enrichment of LREEs and a depletion of HREEs. The trace element spidergram shows enrichments for LILEs (except K), Ti and P, and depletions for Nb and Zr. It is suggested that the rocks formed in island Backarc basin. Zircon UPb dating was taken and two groups of age were obtained. The upper intercept age of (501±1) Ma (MSWD=025) indicates the crystallization age of the original rock during the Late Cambrian. The lower intercept age of (451±2) Ma (MSWD=0084) suggests the age of the metamorphism during the early stage of Late Ordovician. Combined with the result of major and trace element and zircon UPb dating, it is concluded that the subduction of oceanic crust began from the Late Cambrian and the subsequent collision happened no later than the Late Ordovician
两种含氯消毒副产物对草履虫急性毒性效应初探
Initial Study on Acute Toxicity of Two Chlorination Disinfection by-Products (CDBPs) against Paramecium Caudatum
 [PDF]

李晓珊,,, 王能红, 唐天乐
Water pollution and treatment (WPT) , 2015, DOI: 10.12677/WPT.2015.33008
Abstract:
氯化消毒是我国普遍采用的城市污水消毒措施,然而,氯化消毒的同时,氯与水中的有机物发生反应生成一系列的卤代烃类化合物,即氯化消毒副产物。经研究证实大部分氯化消毒副产物具有致癌、致突变、生殖毒性效应。为研究消毒废水中一些副产物的毒性,本研究采用消毒废水中的有害副产物三氯甲烷(CHCl3)和三溴甲烷(CHBr3)为毒物材料,以草履虫为受试生物,对其种群进行单一急性毒性和联合毒性实验,探究CHCl3和CHBr3对草履虫的急性毒性和联合毒性。实验结果表明,两种毒物单独作用时,随着浓度增大,毒性作用也增大,CHCl3的1 h半致死浓度(LC50)为1585.27 μg/L,CHBr3的1 h半致死浓度(LC50)为656.37 μg/L,两种毒物共同作用时表现为协同作用。由于草履虫对两种毒物毒性较为敏感,其可作为CHCl3和CHBr3的毒性评价生物。
Chlorination is widely applied to disinfect drinking water in China. However, a series of chlori-nated disinfection by-products (CDBPs) are formed when chlorine reacts with organic matters in water health. Many CDBPs can cause health hazards for human, for example, cancers and mutagenic and reproductive toxicity. For the study of disinfection by-products in some wastewater toxicity, this study used the harmful by-products, chloroform (CHCl3) and methyl bromide (CHBr3) in disinfection wastewater, as poison materials. In single acute toxicity test and joint toxicity test, the acute toxicity and joint toxicity of CHCl3 and CHBr3 to paramecium were studied. The results show that, when the two toxicants work separately, toxic effects increase along with the increasing concentration. The median lethal concentration (LC50) of CHCl3 in 1 h was 1585.27 μg/L and that of CHBr3 was 656.37 μg/L, and it showed a synergistic effect when combining two poisons. Since paramecium is sensitive to the toxicity of the two poisons, it can be used to evaluate the toxicity of CHCl3 and CHBr3.
基于共链网络分析的国内电子商务网站竞争力探析
,
图书情报工作 , 2012,
Abstract: ?指出共链分析已在商务网站评价、竞争情报分析、商业信息挖掘等领域有广泛应用。综合运用共链分析与社会网络分析的方法,对国内市场份额排名前50位的电子商务网站的企业竞争态势与竞争关系及地位进行综合分析,并对企业间潜在竞争关系挖掘进行初步探索,以期能对竞争情报方法论研究和国内电子商务市场的发展提供一定的启示和参考。研究发现,共链网络中节点的程度中心性与企业实际的市场份额之间存在显著的相关关系,且竞争关系多存在于不同组织下业务类型相似的企业实体,而有些互补服务的企业之间则是合作关系的存在,这一发现或许能为未来电子商务市场发展战略规划与制定提供一定的指导和帮助。
入境宁波的热带气旋活动特征的气候统计及其年代际变化
Characteristics of Tropical Cyclone Landfall in Ningbo: Climatological Statistics and Decadal Variability
 [PDF]

,, 许士斌
Climate Change Research Letters (CCRL) , 2016, DOI: 10.12677/CCRL.2016.52016
Abstract:
本文利用中国气象局热带气旋(TC)资料中心最佳路径数据集,对入境宁波的TC进行统计,从1949到2014年共有71个TC入境宁波,通过合成分析和显著性检验发现:TC源地强东风引导气流的存在和西风带的南北位置是影响TC路径的重要原因。在1990s中后期以来的全球变暖减缓阶段,入境宁波的TC频数在9~10月份显著增多。1990s中后期之后,整个太平洋海表面温度(SST)呈现出太平洋年代际涛动(PDO)的负位相和赤道太平洋的类拉尼娜型海温分布,Walker环流增强,调制了西太副高的加强和西伸,使得西北太平洋TC移动路径偏西,登陆我国海岸线中段的TC频数增多,造成了在9~10月份入境宁波的TC频数增多。就TC生成而言,1990s年代中期之后西北太平洋TC源地西部垂直风切变的减弱和相对湿度的增加可能造成了TC生成的增加,而较东位置则与之相反。
Based on the Best Track Dataset from China Meteorological Administration during 1949-2014, there were 71 tropical cyclones (TCs) during the period landfall in Ningbo. According to composited analysis and t-test, the area which TC genesis with strong east-wind and the location of westerlies play an important role in TC moving. During the autumn season (September and October) of global warming hiatus epoch after the mid-to-end of 1990s, the TC number of moving to Ningbo was increased significantly. The reason may be associated with the Pacific decadal oscillation became into its negative phase. Since the sea surface temperature showing a La Nina-like pattern, which enhanced Walker Circulation and further modulated western Pacific subtropical high (WPSH), the WPSH extended westward and intensified, causing TC moving favorite to western region and favorite landing at Chinese mainland. The genesis of TC over the western North Pacific also appears interdecadal shift indicated by genesis potential index of TC. The decreasing of vertical wind shear and increasing of relative humidity play a dominant role in TC genesis increasing.
美国财政赤字状况及其可持续性分析:基于蓬齐博弈与非蓬齐博弈的分析
,
中央财经大学学报 , 2014,
Abstract: ?2012年,作为全球经济霸主的美国面临着陷入“财政悬崖”的危机。危机虽已暂时解决,却再次为赤字状况频频告急的美国政府敲响了警钟,揭示了当前美国财政所面临的严重收支矛盾。有鉴于此,本文以探讨美国的财政赤字状况及财政可持续性为目的,详细总结了美国财政收支规模和结构的历史走势及现状,并分析其政策、体制等方面的成因,然后在现有的关于财政可持续性研究成果的基础上,通过建立满足非蓬齐博弈条件的跨时预算约束理论模型,并根据历史数据对美国财政可持续性进行协整检验,最后以美国为鉴,反思我国财政运行面临的相关风险。
农民工身份的建构与转变:基于承认的视角
Theconstruction and change of migrant workers' identity: On the perspective of recognition

包先康,
- , 2016, DOI: 10.11835/j.issn.1008-5831.2016.06.003
Abstract: 以户籍制度为标志的城乡二元社会经济结构使社会形成了“农民-工人”相分离的主导的身份模式。改革开放以来,随着经济和社会结构的双重转型,农民与工人两种不同的身份实现了过去人们难以想象的奇异结合,“农民工”这一特殊身份的建构是错误承认的结果,因而农民工身份的转变需要合理的承认来实现。
Urban and rural dual social economic structure which is signed by the household registration system, makes the society forms the dominant mode of the "peasants-workers" separation of the identity. Since the reform and opening, with the transformation of social and economic structure, the peasants and workers who own two different identities realize a singular combination that is hard to imagine in the past. The construction of special status roots in misrecognition. If we want to change the peasants-workers' status, we must apply with the strategy of rational-recognition.
基于感性工学的家庭服务机器人外形设计研究

包装工程 , 2015,
Abstract: 目的 将消费者对于家庭服务机器人外形的感性认知进行系统量化, 归纳出一般规律, 并进一步将消费者的感性需求转化为新产品的设计要素。方法 运用感性工学中的语义差异法和层次分析法对现有产品进行分析, 得出 “亲和关爱” 要求下的技术特征, 并基于机器人现有的功能需求和机械结构提出新的设计方案。结论 开辟了一条用理性方法解决感性问题的新途径。
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