新场须四下亚段沉积相精细描述

根据高分辨层序地层学和沉积特征,新场须四下亚段可划分为TX48、TX49、TX410三套砂组。主要为辫状河三角洲相的粗碎屑沉积,其中砾岩、砂砾岩属超致密储层,砂岩主要为致密储层,天然气产出须裂缝沟通,砂岩为储集空间的主要提供者但不发育裂缝,而砾岩发育。因此,用分流河道和水下分流河道微相难以描述有利储集体,需细化微相。根据沉积构造、岩性组合、电性等识别标志,将其分为砾质、砂砾质以及砂质(水下)分流河道微相、河口坝、远砂坝沉积微相。通过地球物理技术的精细刻画,揭示研究区北部、中部储层沉积微相以三角洲平原砾质、砂砾质以及砂质分流河道为主,而往南以三角洲前缘亚相的河口坝、远砂坝沉积微相为主,细化了储层的空间展布规律,可为后续的储层储集性能的研究及储层评价提供有力支撑。     

浅谈歌唱中“松”与“紧”的把握

歌唱中“松”与“紧”的把握是歌唱整个过程的关键,在吐字、音色、呼吸、声带发音、演唱中的情绪以及心理素质等方面均存在“松”与“紧”的对比调节问题。本文着重从歌唱中的呼吸、咬字、音色调节、演唱情绪等方面做以探讨。     

关于有限平坦表现模

将有限表现模限制在平坦维数≤1,得到有限平坦表现模及其性质,利用有限平坦表现模类给出了其Ext-正交模即FFP-内射模,刻画了右F-凝聚环与右F-正则环。在环的几乎优越扩张S≥R下,证明了S为右F-凝聚环当且仅当R为右F-凝聚环,S为右F-正则环当且仅当R为右F-正则环。     

科学发展观视野下大学生就业问题思考

自20世纪90年代末高等教育由精英教育转入大众化教育以来,高校毕业生走上了自主择业之路,就业形势日趋严峻。导致大学生就业难的因素比较复杂,既有社会和学校的原因,也有学生本身的原因。要破解高校学生就业难的困局,必须以科学发展观为指导,强化政府相关职能,科学设置招生专业,加强学生能力的培养,转变学生就业观念,积极做好就业信息服务,促进招生就业良性循环。     

试谈触探法检测水泥粉喷桩的几个问题

在实践的基础上评价了目前水泥粉喷桩检测工作中儿种方法的优缺点．指出了触探法检测水泥粉喷桩的工作方法、技术要点及其优越性。     

外加束缚在连续下蹲跳至力竭过程中对下肢肌肉活动的影响

目的：运用表面肌电技术探讨外加紧身束缚在连续下蹲跳至力竭过程中对下肢主要发力肌肉活动的影响及其可能的内在机制.方法：随机抽取成年健康男性受试者12名,利用梯度压缩式紧身运动长裤使下肢分别在4种不同紧身束缚压下完成全力连续下蹲跳至力竭运动测试;对一侧下肢肌群均方根肌电图（RMS）和中心品频率（CF）肌电指标作信号处理后,采用单因素方差分析进行实验数据的统计和比较.结果：（1）无外加紧身束缚时,下肢肌RMS整体随蹲跳次数的增加呈现出先增大后减小的趋势,CF仅在疲劳后期有一定程度的降低;（2）外加轻度紧身束缚对下肢肌RMS及CF的整体变化特征无显著影响;（3）外加中度紧身束缚在疲劳末期使下肢肌RMS减小幅度降低,CF的降低趋势及程度减弱;（4）外加高度紧身束缚在疲劳末期使下肢肌RMS减小幅度上升,CF的降低程度增加.结论：连续下蹲跳至力竭过程中,外加轻度紧身束缚对下肢肌肉活动无明显影响;外加中度紧身束缚有利于维持力竭前肌力的输出功率和动作电位的传导速率,对下肢肌肉疲劳后期的活动有积极影响;而外加高度紧身束缚则在一定程度上会加速下肢肌肉疲劳后期的力竭进程.     

Headteacher as a Pedagogical Leader: a Comparative Study of Headteachers in Sweden and England

ABSTRACT

This is a comparative study, drawing on data obtained from interviews conducted with headteachers, that compares the roles of Swedish and British headteachers as pedagogical leaders. For its analytical framework the study uses the qualitative research approach known as phenomenography and, in the context of the guiding legal documents related to education, examines the study's findings as frame factors and as tight and loosely coupled systems. Based on interviews with the study's subjects (five Swedish and five English headteachers), discernible differences were noted between Swedish and English headteachers in their roles as pedagogical leaders. Both groups are responsible for the administration and management of the school but, compared to the Swedish headteachers, their English counterparts have greater personal responsibility for the school's overall performance and are more focused on providing leadership in teaching and learning. In contrast, the Swedish headteachers had a greater separation of the two roles, with the headteacher taking responsibility for administration and leaving responsibility for teaching and learning to the teachers.     

北部湾经济区工程管理专业人才培养研究——基于高校服务地方经济发展视角

探索北部湾经济发展新形势下,对工程管理专业应用型人才的新要求,分析传统的人才培养模式与当前社会需求之间的差距,分析其产生原因。寻求最佳解决途径。     

Transport properties on La0.7Sr0.3MnO3/Al2O3/Fe tunnel junctions

Manganese oxide La_0.7Sr_0.3MnO₃ produced on (001) LaAlO₃ substrate by means of sol-gel spincoating method was used as the base electrode of LaSrMnO/Al₂O₃/Fe tunnel junctions. The I-V characteristic in the high bias region of this system was shown to be similar to that of the conventional tunnel junctions. Anomalous temperature dependence of tunneling resistance was observed to be a positive temperature coefficient of resistance. This phenomenon was attributed to the high voltage applied and was simply elucidated from the density states vs. energy diagram. Project(199031) supported by the Science Foundation of Zhejiang Province.     

当代环境伦理学研究综述

环境伦理学是一门应用伦理学的新兴学科。章概述了近年来我国学在这一领域的研究进展,内容涉及环境伦理学的研究对象、自然的价值、自然的权利、“人类中心主义”和“非人类中心主义”的争论、环境伦理与国际公正、环境伦理学的原则和规范。