廊坊市南水北调配套水厂以上输水管道工程土工试验指标分析

本文主要阐述了廊坊市南水北调配套水厂以上输水管道工程土工试验指标,并对其进行了详细地分析。     

风景区及其边缘城镇统筹发展研究——以重庆统景为例

立足资源、面向市场、强化差异性竞争成为中国西部城镇重要发展途径.风景区边缘城镇由于毗邻稀缺的风景名胜资源的区位优势,迫切希望依托风景区带动地方全面发展,事实上却存在开发与保护冲突、景镇建设脱节的现象,其核心矛盾在于景区与城镇定位不明、资源配置不利、产业发展脱节.基于可持续发展理念提出景镇统筹发展思路,其核心包括生态环境保护优先、产业经济统筹发展、空间景观整体塑造、社会生活和谐共荣.最后以重庆统景规划为例,构建以空间、风貌、旅游、地产四大板块为基础的景镇统筹发展整体框架,实现生态安全保障、经济高度发展、三大效益高度统一的发展目标.     

上海三菱电梯智能制造技术应用点滴

1 装备制造业发展形势 制造业是国民经济的物质基础、国家安全的重要保障、国民经济高速增长的发动机及国家竞争力的主要体现。回顾世界制造业的发展历史,在19世纪末初步形成的制造业,主要生产方式是机械化加上电气化的批量生产。20世纪上半叶,以机械技术和机电自动化技术为基础的制造业的生产得到空前发展,以大批量生产为主的机械制造业成为制造活动的主体。近30年来,     

超高层钢结构转换层施工技术

广州珠江新城J2-2地块项目超高层钢结构转换层施工技术,采取厂内实体卧拼和计算机模拟预拼互验规则;优化后,可直接采用计算机模拟验收。桁架层超重构件吊装、定位、焊接等关键施工工段,采取相应的施工措施,保证施工质量及精度。为超高层钢结构转换层施工积累了宝贵的经验。     

特色工作室之我见

1工作室组织架构 罗文兵工作室成立于2005年,经过近10年的磨砺及传承,逐步发展成为一支专业技能强、组织架构完备、综合素质高的设计团队。2014年云南省设计院经过集团化改革,以罗文兵工作室为核心成立了云南省设计院集团第十二建筑设计有限公司,由罗文兵任董事长。     

南宁市城市风貌标识设计探讨

风貌标识是形成城市特色、构成城市风貌的重要载体,特别是风貌标识与城市空间结构和风貌规划结构相吻合时,"点—线—面"的系统布置将会更好地强化城市的识别性。风貌标识将在城市发展建设中发挥越来越重要的宣传、教育、旅游指引和人文关怀等方面作用。在进行城市风貌标识的规划设计过程中,要全面了解和分析城市的风貌特色,包括地理环境、气候条件、地域文化、民俗民情和建筑风格等因素,根据城市结构功能的整体特点进行综合分析,确定风貌标识的空间分布结构、色彩基底、基本内容和基本样式等。     

工程质量监督委托执法法律关系及法定程序研究

随着《建筑法》和《建设工程质量管理条例》以及住建部5号令的陆续颁布和实施,建筑业相关法律、法规不断出台和日益完善,为建筑工程质量管理监督提供了较为充分的法律依据。建设工程管理具有专业和技术性强、监管周期长、涉及到的知识面广等特点,为此,政府建设主管部门不可能专门组建一个庞大的监督执法队伍,对建设工程质量实施亲历所为的日常管理,因此,委托执法模式是现阶段一种比较恰当的执法方式。对照相关法律、法规,探析工程质量监督的委托执法行为的法律关系,以及法律构成要件,明晰委托执法的法定程序,这对做好工程质量监督委托执法工作是十分有益的。     

Kinetic modeling of simultaneous polycondensation and free radical polymerization for polyurethane/poly(methyl methacrylate) interpenetrating polymer network

A comprehensive kinetic Monte Carlo algorithm has been developed to investigate the formation process of a polyurethane/poly(methyl methacrylate) (PU/PMMA) interpenetrating polymer network (IPN), in which a component independent strategy is proposed to perform the simulation of simultaneous polycondensation and free radical polymerization. An empiric diffusion model based on the mass fraction of polymer is used to quantify the effect of diffusional limitations on MMA polymerization. Results show that the presence of acrylic monomers has little impact on the formation rate of PU, but the presence of the PU network can accelerate the polymerization of MMA. In addition, the effects of component mass ratio, acrylic cross-linker concentration, and [NCO]/[OH] ratio on the IPN formation kinetics are investigated based on the kinetic model. It is believed that the as-developed modeling strategy can be extended to other IPN systems and provide a better understanding of the interactions between chemically independent networks.     

Enhanced sound absorption properties of porous ceramics modified by graphene oxide films

Under the condition of constant thickness, improving the low-frequency sound absorption performance of conventional sound-absorbing materials is a challenging research topic. To address this issue, a new reduced graphene oxide/polyvinyl alcohol (RGO/PVA) porous composite ceramic was fabricated using freeze-drying and optimized by redesigning the internal connecting pores of porous ceramic matrixes with a reticular microstructure using RGO and PVA. The as-prepared porous structure showed significant enhancement in the low-frequency sound absorption band compared with pristine porous ceramics. In addition, the hybrid porous ceramics exhibited low thermal conductivity. These favorable properties indicate that the hybrid sound-absorbing ceramics have potential application prospects for noise reduction in the fields of construction and electrical and mechanical devices.     

Post-processor development for a turning and milling composite machine tool

The accomplishment of a turning and five-axis milling in only one setup is extremely useful and is possible on a turning and milling composite machine tool. In this work, we present a control algorithm and develop a post-processor for this machine, which has six linear and three rotary axes. To calculate a generalized kinematics model, coordinate systems are established by analyzing the basic kinematic chain relation of the turning and milling composite machine tool. The two vectors, which control the motions of the cutter contact workpiece, are simultaneously transformed to provide the algorithms of the rotary angles and motion coordinate. A special post-processor written in JAVA language is developed according to the proposed algorithm. To evaluate the effectiveness and accuracy of the developed post-processor, a specimen (blade) is used in the cutting simulation and real machining experiment. Experimental results showed the effectiveness and accuracy of the proposed algorithm. Furthermore, Compatibility is improved by adding new functions such as change of target machine, cutter location data change, workpiece origin offset, and cutting feed rate control.