Groundwater storage and depletion trends in the Loess areas of China     

Aidi Huo  Jianbing Peng  Xunhong Chen  Lin Deng  Guoliang Wang  Yuxiang Cheng 《Environmental Earth Sciences》2016,75(16):1167

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New models to predict rock failure by linking the volume dilatant point with the peak stress point     

Guoliang.?LIEmail author  Siqing.?QIN  Pei.?LI  Miaomiao.?WANG  Xiaowa.?WU 《Arabian Journal of Geosciences》2016,9(14):647

The rock mass failure process can be divided into several distinct deformation stages: the compaction stage, elastic stage, stable failure stage, accelerated failure stage, and post-peak stage. Although each stage has been well studied, the relationship among the stages has not been established. Here, we establish two models which are the Strain model Q and Energy density model S by using the renormalization group theory and investigate the mechanical relationship between the volume dilatant point and peak stress point on the rock stress-strain curve. Our models show that the strain ratio (ε _f /ε _c ) and energy ratio (E _f /E _c ) at the volume dilatant point and peak stress point are solely functions of the shape parameter m. To verify our models, we further studied the failure process of rock specimens through several uniaxial compression experiments and found that the relationship between ε _f /ε _c or E _f /E _c and m shares a notably similar pattern to that from our theoretical model. However, the ε _f /ε _c and E _f /E _c values in our experiments are slightly smaller than those predicted by the models. In brief, we demonstrate that our models can be used to predict the failure process of the laboratory-scale hard brittle rock samples.  相似文献   

白垩纪以来太平洋上地幔组成和温度变化   总被引：1，自引：0，他引：1  

张国良 《海洋学报(英文版)》2016,35(4):19-25

The geological evolution of the Earth during the mid-Cretaceous were shown to be anomalous, e.g., the pause of the geomagnetic field, the global sea level rise, and increased intra-plate volcanic activities, which could be attributed to deep mantle processes. As the anomalous volcanic activities occurred mainly in the Cretaceous Pacific, here we use basalt chemical compositions from the oceanic drilling(DSDP/ODP/IODP) sites to investigate their mantle sources and melting conditions. Based on locations relative to the Pacific plateaus, we classified these sites as oceanic plateau basalts, normal mid-ocean ridge basalts, and near-plateau seafloor basalts. This study shows that those normal mid-ocean ridge basalts formed during mid-Cretaceous are broadly similar in average Na8, La/Sm and Sm/Yb ratios and Sr-Nd isotopic compositions to modern Pacific spreading ridge(the East Pacific Rise). The Ontong Java plateau(125–90 Ma) basalts have distinctly lower Na8 and143Nd/144 Nd, and higher La/Sm and 87Sr/86 Sr than normal seafloor basalts, whereas those for the near-plateau seafloor basalts are similar to the plateau basalts, indicating influences from the Ontong Java mantle source. The super mantle plume activity that might have formed the Ontong Java plateau influenced the mantle source of the simultaneously formed large areas of seafloor basalts. Based on the chemical data from normal seafloor basalts, I propose that the mantle compositions and melting conditions of the normal mid-ocean ridges during the Cretaceous are similar to the fast spreading East Pacific Rise. Slight variations of mid-Cretaceous normal seafloor basalts in melting conditions could be related to the local mantle source and spreading rate.  相似文献   

皱纹盘鲍肠上皮组织立克次体超微结构与细胞病理学研究   总被引：1，自引：0，他引：1  

姜明  刘云  陶逎蓉  范瑞青  姜国良 《中国海洋大学学报(自然科学版)》2002,32(6):914-918

利用电镜技术对患病濒死皱纹盘鲍 (H aliotis Discus hanna Ino)进行病原体检测和病理观察 ,在肠上皮组织中发现大量立克次体。研究表明 ,皱纹盘鲍肠上皮细胞中的立克次体分为增殖型立克次体和静止型立克次体 2种类型。立克次体以皱纹盘鲍肠上皮细胞为感染的靶细胞 ,造成细胞微绒毛全部或部分破坏 ,细胞功能丧失 ,是造成养殖皱纹盘鲍病害发生和死亡的主要病原体。  相似文献   

Community diversity of bacteria in digestive tract of mud snail (Bullacta exarata Philippi) and its rearing shoal   总被引：3，自引：0，他引：3  

Wang Guoliang  Zheng Tianlun  Lu Tongxi  Wang Yinong  Yu Hong  Jin Shan 《海洋学报(英文版)》2002,21(4):529-534

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｍｕｄｓｎａｉｌＢｕｌｌａｃｔａｅｘａｒａｔａＰｈｉｌｉｐｐｉｉｓｄｅｌｉｃｉｏｕｓａｎｄｎｕｔｒｉｔｉｏｕｓ ,ａｎｄｗｅｌｌ ａｃｃｅｐｔｅｄｂｙｐｅｏｐｌｅ,ｅｓｐｅｃｉａｌｌｙｉｎＺｈｅｊｉａｎｇＰｒｏｖｉｎｃｅ ,Ｃｈｉｎａ ,ｋｎｏｗｎａｓａｎｅｃｏｎｏｍｉｃａｌｌｙｉｍｐｏｒｔａｎｔｍａｒｉｃｕｌ ｔｕｒａｌｓｈｅｌｌｆｉｓｈｓｐｅｃｉｅｓ .Ｉｔｈａｓａｔｔｒａｃｔｅｄｃｏｎｓｉｄｅｒａｂｌｅｍａｒｉｃｕｌｔｕｒｅｉｎｔｅｒｅｓｔａｌｏｎｇｔｈｅｃｏａｓｔｏｆ…  相似文献   

Investigation on the Performance of Articulated Buoys     

Feng Bojun  Huang Guoliang Liu Tianwei Associale Professor  Shanghai Jiao Tong University  Shanghai Engineer  Shanghai Jiao Tong University  Shanghai 《中国海洋工程》1995,(4)

Articulated buoys become more and more popular by the marine management departments as a new type of aids to navigation, for they possess an excellent hydrodynamic performance with small static heel angle in wind and current and small rolling in wave and accurate position. The structure of articulated buoys and calculation method of their hydrodynamic performance are introduced in this paper. A scries of experiments has been conducted in the State Key Laboratory of Ocean Engineering of China and useful results achieved for providing a design optimization basis.  相似文献   

大亚湾丽叶鲹的年龄、生长和个体生殖力     

陈万青  姜国良 《台湾海峡》1990,(3)

本文以耳石作依据对大亚湾丽叶鲹的年龄和生长进行了研究。报道了其年轮特征、年龄组成、体长与体重的分布;给出了丽叶鲹的体长与体重、体长与耳石长的关系和生长方程;采用重量法求得了180尾雌鱼的怀卵量,并计算了其绝对生殖力和相对生殖力及其与体长和体重的关系;分析了卵径分布、性成熟系数的月变化及幼鱼的生长情况。  相似文献   

青岛沿岸鸥类越冬习性的初步研究     

刘云  姜国良  杨栋 《海洋湖沼通报》2001,(4):56-60

有六种鸥类在青岛沿岸越冬，即红嘴鸥，黑尾鸥，银鸥，灰翅鸥，棕头鸥及灰背鸥。红嘴鸥和黑尾鸥是优势种，其群落多样性及均匀性指数均较低；鸥类日活动受潮汐的涨落，浮游生物的昼夜垂直迁移的影响较大。  相似文献   

铰接式浮标性能研究     

冯伯俊  黄国樑  刘天威  龚骅 《海洋工程》1994,(4)

铰接式浮标作为一种新型助航标志越来越受到海监部门的欢迎。铰接式浮标具有良好的水动力性能，在风流中静倾角及在波浪中摇摆角都较小，而且定位准确。本文对铰接式浮标的结构及其水动力性能计算方法作了介绍，并在国家重点实验室──海洋工程实验室作了系列试验，得出一些有益的结果，为优化设计提供了依据。  相似文献   

A Potential Strain Indicator for Brittle Failure Prediction of Low-porosity Rock: Part I—Experimental Studies Based on the Uniaxial Compression Test     

Lei Xue  Meng Qi  Siqing Qin  Guoliang Li  Pei Li  Miaomiao Wang 《Rock Mechanics and Rock Engineering》2015,48(5):1763-1772

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