惩戒解雇事由研究

《劳动合同法》第39条对惩戒解雇的规定在实际应用中出较多问题.理论上,如何合理界定归于雇员的原因,使用人单位的自由用工权与劳动者的劳动权达到平衡,是惩戒解雇事由需要重点解决的问题.我国应从劳动法的视角建构起用人单位惩戒解雇的法律规则,并完善相关的权利救济制度,使用人单位的自由用工权与劳动者的劳动权达到平衡.     

建筑电气与智能化专业的建筑消防与安防课程的研究与实践

本文探讨了建筑消防与安防课程的建设问题.在天津城市建设学院建筑类院校的背景下,在建筑电气与智能化的专业属性下,从教学内容的更新、教学体系的优化,以及教学方法的改革等不同方面,对该课程的建设进行了分析和研究.     

Effect of straw mixing amount on mechanical properties of admixture-adding hollow block

The bonding mechanism between straw and concrete was analyzed through testing the compressive strength and flexural strength of hollow block, with different straw amount and different dosage and types of admixtures. The test results show that the mechanical properties of hollow blocks reduced after adding straws, and the more straws was added, the more hollow block density decreased. But adding Al₂(SO₄)₃ and CaCl₂ could improve the dense degree between rice straw and concrete. And when the proportion of straw mixing amount was 10%, the flexural strength of the early strength agent (2% Al₂(SO₄)₃, CaCl₂) added hollow block reached as maximal as 3.1 MPa, while the compressive strength was 9.1 MPa, consisting with the strength grade of common concrete hollow block MU7.5.     

Mechanical properties of deep-buried marble material under loading and unloading tests

The mechanical properties are essentially different when rock material is subjected to loading or unloading conditions. In this study, loading and unloading tests with various confining pressures are conducted to investigate the mechanical properties of marble material samples taken from the deep diversion tunnels of Jinping II Hydropower Station. The stress-strain relationship, failure characteristics and strength criterion are compared and analyzed based on the experiment results. The results show: in the loading and unloading test, peak strength, lateral strain, axial strain and plastic deformation increase significantly as the confining pressure increases. Lateral strain increased significantly and obvious lateral dilatancy can be observed to the change of confining pressure; The fracture mode is mainly the single shear fracture for the triaxial compression test and post-peak test, angle between the failure surface and the ends of the rock material becomes smaller as the confining pressure increases. Hoek-Brown strength criterion reflects the strength characteristics of marble material under two different unloading conditions, and has some supplementary effects to the rock material of mechanical field.     

软硬相隔土层中超深地下连续墙的施工技术

超深地下连续墙的施工技术在我国已有很大的发展,但是超深地下连续墙在软土条件下的施工还不是很成熟.以天津滨海新区于家堡地区某深基坑实际工程为例,对其特殊地质条件下超深地下连续墙的施工技术进行了分析和总结,得出的施工技术和处理措施能够解决该地区类似工程的施工问题.     

微梁无耗散弛豫动态过程分析及仿真

为探讨微机电系统中梁结构无耗散弛豫动力学特性,基于Euler-Bernoulli梁方程,引入两端绞紧梁边界条件,推导梁挠度无耗散弛豫理论表达式,并给出梁挠度振幅分布以及弛豫周期内挠度动态Maple算例。对微梁无耗散弛豫过程进行有限元仿真,结果表明,弛豫仿真周期与理论计算相符,梁挠度振幅仿真分布与算例有差异,大挠度弛豫振幅与初始挠度仿真比值与理论相差较大。     

天兴洲大桥南汊主桥主桁断面型式的研究

介绍了在天兴洲长江大桥初步设计过程中对南汉主桥主桁断面型式提出的6种方案，并且从结构受力、施工难易等方面比较了这6种方案的优缺点，最后确定了主桁断面的实施方案——三主桁断面型式.     

某铀矿床碱法地浸溶浸液配方探讨

结合某铀矿床碱法地浸室内试验，进行了氧化剂的种类、质量分数和溶浸剂的种类、质量分数选择试验，研究了反应时间、矿石粒度对铀浸出率的影响。结果表明，碳酸（碳酸氢）钠盐或铵盐是良好的溶浸剂，铀浸出率可达到70％～80％；加入质量分数为0．1％的双氧水和质量分数为0.02％的高锰酸钾，铀浸出率明显提高，可满足铀浸出需求。     

三维人脸库数据还原处理

利用北京工业大学多媒体与智能软件技术实验室创建的中国人彩色三维人脸数据库中所提供的三维人脸数据，还原到规格化前的三维人脸数据，并建立了几何图与纹理图的双向映射关系．这一研究对于后续研究时的三维人脸数据操作具有重要意义．     

XML中的主动规则的模型及其可终止性分析

在对XML数据模型主动机制研究的基础上，结合规则实例提出了一种新的分析规则终止性的静态判定算法。此算法基于触发环的概念，首先对触发环中每一个被修改的节点产生一个递归等式，然后通过展开递归等式并检验其可满足性，就可以分析规则集的可终止性，这样不仅可以得到更高的精确度及更小的复杂度，而且可以得到有效的判定主动规则可终止性的条件。