平面变胞机构及其结构分析

首先定义了变胞机构和变胞运动副的概念,提出了5种类型的变胞运动副,并对它们的特性和原理进行了详细的研究;通过变胞机构中自由度变化分析,提出了变胞机构中变胞运动链的概念,研究了变胞机构的结构组成原理和变胞机构的结构分解步骤,为变胞机构构态变换和机构的综合打下了坚实的基础.     

一种圆柱壳体圆孔切割机构变胞特性分析

提出了一种新型的变胞切割机构,应用于机械设备尤其是舰艇圆柱壳体表面的孔切割.通过变胞切割机构的拓扑结构的变化,使机构自由度发生改变,以适应在切割过程中切割圆孔直口、在所开孔上切割变角度坡口,以及在直口切割和坡口切割之间进行切割状态转化的要求.在对其进行机构原理和2个构态下的自由度分析的基础上,应用拓扑结构图论和邻接矩阵分析了变胞切割机构在2个构态下的各个构件间的连接状态.建立了变胞方程和变胞矩阵,用以分析和描述整个变胞过程.理论分析结果说明了该机构的有效性和实用性。     

福建煤变质的因素和类型

从煤岩学角度并结合福建省的地质、构造条件，阐述了影响福建省煤变质的因素和类型，研究表明，福建煤的变质应属多元、叠加的结果。     

Coesite eclogite facies metamorphic tectonite: Evidence for ultrahigh pressure deformation

An ultrahigh pressure ductile shear mélange crops out on the beach of Yangkou Bay near Qingdao City. The mélange is composed of weakly deformed blocks in a highly ductilly flow mylonites. Ultrahigh pressure metamorphic (UHPM) tectonite includes strongly deformed eclogite and mylonitized eclogite. Coesite occurs in the tectonite as both interstitial mineral and inclusions in garnet and omphacite, indicating that the deformation took place in the stability field of coesite (800—850℃, >30 GPa) in the upper mantle. Coesite is rounded or short prismatic grains with undulatory extinction, and often fractured, suggesting brittle deformation. Garnet is also characterized by brittle fractures and sometimes necked and slightly elongated. Omphacite is elongated, with long axis preferred orientation. Undulatory extinction, subgrains and dynamically recrystallized grains suggest plastic flow of omphacite. Ultrahigh pressure metamorphic tectonite was probably formed in the ductile shear zone during the early stage of exhumation of the ultrahigh pressure metamorphic rocks. Its kinematic indicators point to the transport direction of the UHPM slab during the early stage of exhumation.     

Call in question and discussion: Are there sandwiched low-grade metamorphic slabs within UHP metamorphic rocks in the Dabieshan terrane

Some geologists reported their discovery of sandwiched low-grade metamorphic slabs within UHP metamorphic Complexes in Changpu, Yuexi County, Anhui Province. They also suggested that some coesite-bearing eclogites are igneous veins, which intruded low-grade metamorphic slabs and other related rocks. Moreover they further called in question to UHP metamorphic process and continental collision tectonism in the Dabieshan terrane. Based on our recent study, so-called low-grade metamorphic slabs are strongly deformed fabric, fine-grained and tectonic recrystallized mylonites and tectonites. Their protolith rocks are garnet-bearing orthogneiss, eclogite and marble, as well as a few amounts of strongly deformed acid and basic veins. Their metamorphic, geochemical and geochronological characteristics are also identical with UHPM rocks and regional country orthogneisses. Therefore we conclude that there are not low-grade metamorphic slabs sand wiched with UHP metamorphic rocks in the Dabieshan terrane.     

桐柏围山城地区变质岩形成的温压条件

文章基于变质岩中的矿物共生组合和前进变质作用中的特征矿物,论述了桐柏围山城变质地体中发育的铁铝榴石+黑云母、蓝晶石+十字石和矽线石变质带与绿帘石角闪岩相及角闪岩相变质作用,并据矿物地质温压计和氧同位素地质温度计,估算了其形成时温压条件是500—650℃,500—700MPa。     

山西大同六亩地一带石墨成矿地质特征

本文论述了大同六亩地一带石墨地质特征,从固定CO_2,CaO和MgO的分析对比,论证了碳质来源于碳酸盐岩石,并提出构造、岩相对成矿的控制作用。得出石墨矿床属混合岩化区域变质型的结论。     

河南洛阳康山变质杂岩内黑云母击象及其成因探讨

黑云母击象是快速变形的产物,因此它的出现可以指示自然快速变形的存在。作者通过对河南洛阳康山变质杂岩内黑云母击象特征和形成环境详细研究,认为该变质杂岩内黑云母击象是在地表以下一定深度隐爆作用产生的脆性破裂。     

金沙江变质杂岩的岩石学特征及其地质意义

介绍了云南东川金沙江变质杂岩的地质背景，较详细地分析了变质杂岩的岩石学、岩石化学特征，鉴定出钠长黑云片岩、浅变质火山岩的原岩为细碧质凝灰岩，可与下元古界河口群变钠质火山岩系对比，是昆阳群地层的基底变质岩系，它的出露可能是地壳多层次伸展滑脱的结果，为进一步探讨该区的地质构造演化提供了事实基础．     

A huge oceanic-type UHP metamorphic belt in southwestern Tianshan, China: Peak metamorphic age and P-T path

Recent progress in the study of the UHP metamorphic belt in southwestern Tianshan, China, is summarized in this paper. This about 80-kin-long and over 10-km-wide UHP belt has been recognized by the discovery of coesite, coesite pseudomorphs and other UHP minerals. It is the largest oceanic-type UHP metamorphic belt reported so far. It has formed due to northward subduc- tion of the Tianshan Paleo-Ocean. U-Pb dating of metamorphic rims of zircons from a coesite-bearing garnet-phengite schist yields a peak UHP metamorphic ages of 320±3.7 Ma. Combined with ages of 233-226 Ma obtained from rims of zircons from retrograded eclogites, a long retrograde metamorphic evolution （〉70 Ma） has been revealed. According to phase equilibria mod- eling, the P-T paths of both coesite-bearing eclogites and garnet-phengite schists are characterized by thermal relaxation, i.e., the metamorphic temperature peak lags behind the pressure peak, indicating that the UHP rocks experienced slow and long heating and decompression during exhumation in the subduction channel. On the basis of the field observation that a small amount of eclogite lenses is wrapped in large volumes of metapelites, and the similar P-T paths of both rock types, we propose that the ex- humation of the UHP eclogites from southwestern Tianshan, China, may have resulted from the exhumation of large volumes of low-density metapelites, which carried the denser eclogites to the Earth＇s surface.     

与不动点和多项式有关的亚纯函数导数的零点

主要研究了亚纯函数的K阶导数的不动点和小函数问题.证明了如果f(z)是个超越的亚纯函数,k是个正整数且f(z)的零点至少是k+1重,极点至少为2重, 那么f^(k)(z)有无穷多个不动点.     

变质核杂岩特征及小秦岭地区变质杂岩成因讨论

目的为确定小秦岭地区发育的变质杂岩体是否属于变质核杂岩。方法总结前人归纳的变质核杂岩特征,与小秦岭地区发育的太华杂岩特征进行对比,再通过对小秦岭地区燕山期后褶皱、南北两侧发育的断裂进行分析和构造演化史研究。结果小秦岭地区的构造特征与变质核杂岩特征不符。结论小秦岭地区的太华杂岩解释为经历了从南向北的铲状逆冲推覆和后期抬升块断剥露的变质杂岩更为合理。     

旋量理论的变胞机构全构态动力学模型

为丰富和发展机构学理论,通过引入切断铰,将空间串并联机构的运动学分析问题转化为开链机构和局部闭链机构的运动学分析子问题,基于旋量理论建立切断铰空间机构的运动学和动力学模型。采用旋量理论和Kane方法对五杆两自由度闭链变胞机构的广义主动力和广义惯性力进行了计算,并建立切割变胞机构的全构态动力学方程。该方法为变胞机构的动力学建模提供了参考依据。     

岩浆岩与变质岩野外识别方法探讨

岩石根据成因可分为岩浆岩、沉积岩和变质岩三大类,其中,地壳中沉积岩含量最少。对岩浆岩和变质岩的野外识别与描述的方法进行了探讨,分别给出了其识别标志、步骤、方法和描述内容。     

ASBR-SBR法处理改性淀粉废水

介绍ASBR-SBR法处理改性淀粉废水的工程实例,通过对系统运行结果的分析,表明ASBR-SBR法处理此类废水切实可行且效果好,CODcr,BOD5,SS等指标均可达到广东省地方标准《水污染物排放限值》(44／26-2001)一级排放标准,且具有运行费用低、结构紧凑、自动化程度高等优点。     

桃林铅锌矿断裂变质带的地质特征研究

详细的野外观察和室内研究表明,桃林断裂变质带中存在有糜棱岩和碎裂岩两个系列的断裂变质岩,并具分带性,说明该带经历了韧性和脆性两个不同机制的变形阶段。笔者认为该断裂变质带早期为一韧性剪切带,晚期叠加了脆性断层。