带有非局部源项的发展方程全局解的不存在性

通过试验函数法,本文讨论了具有形如‖u‖p或‖ Du‖p的非局部源项的发展方程全局解的不存在性.     

微乳液介质中5''-硝基水杨基荧光酮光度法测定微量锰

研究了在混合微乳液介质中 ,Mn(Ⅱ) - 5’ -硝基水杨基荧光酮 (5’ -NSF)的显色反应 ,在pH =9.5～ 10 .5的硼砂缓冲体系中 ,Mn(Ⅱ)与 5’ -NSF形成 1∶2的紫红色配合物 ,ε548=1.4 4× 10 5L·mol- 1 ·mL- 1 ,锰质量浓度在 0～ 0 .2 8mg·L- 1 范围内服从比尔定律。该方法用于岩石矿物及水中微量锰的测定 ,结果满意     

关于旅游产业中几种关系的探讨

总结归纳了旅游业中普遍存在的几种关系,介绍了这些关系的内涵、特征,最后提出协调几种关系的几点建议。     

秋水仙素诱导青虾次级卵母细胞二倍体初探

以青虾卵巢为材料，采用秋水仙素诱导多倍体次级卵母细胞．经滴片试验，确立此实验最佳滴片高度为1．5cm，通过设置5个秋水仙素浓度(0．08～0．40mg／mL)及3个作用时间(6～24h)，观察发生染色体加倍的细胞相对数目．实验结果表明：在使用秋水仙素的浓度为0．08～0．40mg／mL，处理6～24h时都可以获得多倍体卵细胞．在秋水仙素浓度是0．32mg／mL，处理6h可得到最高二倍体突变率(32．58％)．还测试了0．32mg／mL COM作用6h时ATPase活性与生理盐水对照组的变化，结果显示COM会在一定程度上影响细胞的新陈代谢．但是50％左右的成活率表明，这种诱导突变的方法仍具有一定的应用价值．     

PDE-Based Medial Axis Extraction and Shape Manipulation of Arbitrary Meshes

Shape skeletonization （i.e., medial axis extraction） is powerful in many visual computing applications, such as pattern recognition, object segmentation, registration, and animation. In this paper, the authors expand the use of diffusion equations combined with distance field information to approximate medial axes of arbitrary 3D differential properties. It offers an alternative solids represented by polygonal meshes based on their but natural way for medial axis extraction for commonly used 3D polygonal models. By solving the PDE along time axis, this system can not only quickly extract diffusion-based medial axes of input meshes, but also allow users to visualize the extraction process at each time step. In addition, the proposed model provides users a set of manipulation toolkits to sculpt extracted medial axes, then use diffusion-based techniques to recover corresponding deformed shapes according to the original input datasets. This skeleton-based shape manipulation offers a fast and easy way for animation and deformation of complicated mesh objects.     

心理契约组织行为与和谐社会

通过对心理契约含义与特征的介绍,阐述了心理契约组织行为对构建和谐社会的积极作用与反作用,同时在观念、制度、管理方式上对建立和谐社会的平衡心理契约提出了建议.     

一类多步Runge-Kutta方法的保单调性

在对步长作了一定的限制下研究了一类多步Runge-Kutta方法的保单调性,并得到了此类多步Runge-Kutta方法的保单调的充分条件,最后给出了试验方程y′=λ(t)y的情况.     

广义IMBq方程的各向异性有限元方法

研究了广义IMBq方程的各向异性有限元方法,在不需要传统的Ritz投影的情况下,得到了半离散格式下的误差估计.     

Systemic Intervention in a University Department: Reflections on Arrested Action Research

This paper reflects on my experience as an insider researcher attempting to use critical systems ideas and practices to promote quality improvement in a university engineering department. Reflection is a key part of learning. This paper is intended to contribute to critically, self-reflective learning for the community of systems practitioners. These reflections on my questions about participation, ethics, politics of process, and the choices and actions resulting from them may help others to formulate their own. The complexity of systems practice places substantial demands on the researcher, particularly in the case of insider, practitioner research. Nevertheless, the exploration of critical systems approaches to critique boundaries and structure ‘problems’ in the core aspects of higher education in locally meaningful ways should continue. While demanding, it still can work to promote learning about authentic quality.     

浅谈吕梁三泉焦化工业园区区域定位研究

文章以科学发展观为指导,以做大、做强、做优特色园区为目标,以实现高效、稳健、科学发展为前提,分析并提出了吕梁三泉焦化工业园区的发展定位.