不同虾种间肌肉组织蛋白质的比较

采用薄层等电聚焦凝胶电泳方法对罗氏沼虾（Macrobrachium rosenbergii)、绿须虾（Aristeus virilis)、长毛对虾（Penaeus penicillatus)、日本对（P.japonicus)、斑节对虾（P.monodon)和周氏新对虾（Metapenaeus joyneri）的肌肉组织蛋白质进行分离，检测各蛋白质组份及其等电点。根据蛋白质区带的共享度计算共相互间的遗传距离指数，然后用聚类方法处理数据，构建系统树，分析其间的差异程度，最后确定6种虾的亲缘关系。结果表明，每种虾可获得6－11条 蛋白质区带，等电点范围在4－6．95之间。虾类肌肉组织蛋白质组份及其电泳行为，可为虾类在分类学上的定位提供生化依据。     

一类模糊变换及其应用(英文)

本文定义了从X到Y的模糊变换σ_(g·f)和从Y到X的模糊变换σ_(g·f)~(-1)。当g(λ)=λ时这种变换便是查德提出的变换,即扩展原理。此外,还讨论了此变换的性质;指出其在代数系的同态,尤其是群同态方面的应用。并给出有关变换的唯一确定性定理。     

基于邻近图的点群层次聚类方法的研究

空间聚类是点状空间目标群在地图综合中必须解决的问题。分析点群的几种常用邻近图的特征及其层次关系,并基于原始的点集合生成的DT构建相应的GG,UG,MST和NNG,然后在所选择的密度适应性约束、距离适应性约束和偏差适应性约束这三种条件下,利用所生成的邻近图进行了点群的层次聚类。研究并改进现有的点状空间目标群的无监督层次聚类方法,并通过实例验证该算法的可行性。     

内蒙古狼山西段色尔腾山岩群地球化学特征及构造环境判别

狼山地区色尔腾山岩群的研究对探讨华北板块北缘西段晚太古代的构造演化及指导该区铁、铜等矿产勘查具有重要意义。通过对尚德—明路一带色尔腾山岩群的地球化学特征及构造环境研究发现,研究区色尔腾山岩群岩石中富钠贫钾,轻稀土富集,Eu略微亏损;总体富集微量元素;原岩建造为泥质碎屑岩—中基性火山岩和碳酸盐岩建造特点,形成环境为滨海相—浅海相,伴随有小规模的岛弧型火山喷发,晚太古代古蒙古洋开始闭合;同时较厚的碳酸盐岩的沉积说明尚德—明路一带海水较深,不利于含铁、铜的物质沉积。     

豫西偃师南部铝土矿地质特征及控矿地质条件

偃师南部铝土矿床产于中奥陶统侵蚀面之上的石炭系本溪组中,分布于早古生代沁阳-开封坳陷与嵩山隆起过渡地带,构造环境相对稳定,沉积间断时间长,沉积相为滨海-泻湖相,风化及淋滤作用对铝土成矿物质来源及后期铝土矿品位提高起着重要作用.     

Fresh thing for freshman: Exploring a blended method on teaching the history of geographic thought

It is necessary for undergraduates majoring in geography to learn the history of geographic thought. Although there are different cultural and educational backgrounds between China and the West, teaching methods such as text teaching, students’ presentations and group learning are suitable for most of teachers and students even from different countries and regions. The blended method is helpful to popularize history of geographic thought and improve the level of teaching and learning. Owing to lack of the class on the history of geographic thought in countries like China, the authors try to explore a blended method for the first-year geography undergraduates and to assess the effects of this teaching based on some questionnaires. The students have different benefits and responses to this class. A special group consisting of one teacher and several undergraduates does the research and coauthors the paper through making questionnaire, interviewing and analyzing materials from 67 freshmen majoring in human geography and geography science (teacher-training) in China. For the undergraduates especially from the countries like China, it is well worth making the history of geographic thought become a necessary and interesting class.     

唯一强Clean群环

环称为唯一强clean是指每一个元素都可唯一的表示为可交换的幂等元与单位元的和.主要讨论唯一强clean群环的结构,证明了如果群G是局部有限群,则群环RG是唯一强clean环当且仅当环R是唯一强clean环,群G是2-群.     

Dissolution kinetics of selected natural minerals relevant to potential CO2-injection sites − Part 1: A review

This publication provides a literature review on experimental studies of dissolution kinetics of mainly carbonates and feldspar group minerals, i.e. most common minerals at potential CO₂-injection and/or storage sites. Geochemical interaction processes between injected CO₂ and coexisting phases, namely reservoir and cap rock minerals and formation fluids close to the CO₂-injection site can be simulated by flow-through or mixed flow reactors, while processes far from the injection site and long-term processes after termination actual CO₂-injection can be mimicked by batch reactors. At sufficient small stirring rates or fluid flow rates as well as low solute concentrations flow-through reactors are also able to simulate processes far from the injection site. The experimental parameter temperature not only intensifies the dissolution process, the dominant dissolution mechanisms are also influenced by temperature. The dissolution mechanisms change from incongruent and surface controlled mechanisms at lower temperatures to congruent and transport controlled mechanisms at higher temperatures. The CO₂ partial pressure has only a second order influence on dissolution behavior compared to the influence of pH-value and ionic strength of the CO₂-bearing brine. Minerals exposed to CO₂-bearing brines at elevated temperatures and pressures are subject of alteration, leading to severe changes of reactive surfaces and potential precipitation of secondary minerals.Computational simulations of mineral reactions at potential CO₂ storage sites have therefore to include not only the time-resolved changes of dissolution behavior and hence kinetics of mineral dissolution, but also the influence of secondary minerals on the interaction of the minerals with CO₂-enriched brines.     

江西南部震旦—寒武纪寻乌岩组变沉积岩地球化学特征及构造意义

寻乌岩组变沉积岩发育在江西南部新元古代—早古生代南城—寻乌盆地内,时代为震旦—寒武纪。寻乌岩组的Si O2含量变化较大,除1个含量较低的样品外,平均为63.01%,具有相对较高的K2O、Al2O3及(TFe O+Mg O)值,较低的Na2O、Ca O。相容元素含量与后太古代澳大利亚页岩(PAAS)十分接近,高于中国东部上地壳,与其较高的(TFe O+Mg O)特征相吻合,说明源区具有一定数量的中基性组分。稀土元素总量高于上地壳及PAAS,但其球粒陨石标准化配分模式与典型的上地壳及PAAS相似,表现为明显向右倾斜,轻稀土富集,重稀土平坦,铕负异常显著,铈负异常不明显。岩石地球化学特征显示其原岩属于一种中等成熟度的陆源碎屑岩,物源主要为被改造的上地壳长英质和花岗质物源区,少部分物源为中基性火山岩。高场强元素及稀土元素等不活动元素地球化学特征表明其沉积环境为浅海—半深海,其构造环境属于发育有裂谷系的被动大陆边缘,该认识从沉积岩地球化学方面为华南早古生代构造属性提供了新资料。     

On the understanding of cyclic interaction mechanisms in an energy pile group

Integrating ground heat exchanger elements into concrete piles is now considered as an efficient energy solution for heating/cooling of buildings. In addition to the static load of buildings, the concrete piles also undergo a cycle of thermal deformation. In the case of single energy pile, calculation methods already exist and permit to perform a proper geotechnical design. In the case of energy pile group, the thermo‐mechanical interactions within the group are more complex. Very few experimental results on the energy pile group are available so that numerical analysis can be an interesting way to provide complementary results about their behavior. This paper deals with a numerical analysis including a comparison between a single energy pile and an energy pile group with different boundary conditions at the pile head. In order to take into account the stress reversal induced by the thermal expansions and contractions, a cyclic elastoplastic constitutive model is introduced at the soil–pile interface. The analysis aims to give some insights about the long‐term cyclic interaction mechanisms in the energy pile group. Based on this qualitative study, some guidance can be brought for the design of energy piles in the case where group effects should be considered. Copyright © 2015 John Wiley & Sons, Ltd.