1200kt/a乙烯改扩建工程管网改造项目方案探讨

1200kt/a乙烯改扩建工程是大庆石化公司"十一五"发展的重点工程。文中以该工程的工艺及热力管网改造项目为例,从工程概况、材料计划、施工方案编制、过程经营、成本控制、风险防范等方面,探讨了管网改造项目的实施方案。     

Residential energy efficiency retrofits: How program design affects participation and outcomes

Better methods of characterizing and addressing heterogeneity in preferences and decision making are needed to stimulate reductions in household greenhouse gas emissions. Four residential energy efficiency programs were delivered consecutively in the Region of Waterloo, Canada, between 1999 and 2011, and each offered a unique combination of information, financial reward structure, and price. A natural quasi-experimental intervention design was employed to assess differences in outcomes across these program structures. Participation at the initial (evaluation by an energy advisor) and follow-up (verification of retrofit) stages, and the material characteristics (e.g., energy performance) were measured and compared between the groups of houses included in each program at each stage. The programs appealed to people with different types of material concerns; each phase of the program was associated with houses with a different mix of material characteristics and depths of recommended and achieved changes. While a performance-based reward attracted fewer houses at each stage than a larger list-based reward, older houses with poorer energy performance were included at each stage. The findings support experimentation with program designs to target sub-populations of housing stock; future program designs should experiment more carefully and with larger performance-based rewards and test parallels with potential carbon market structures.     

再造同感 记日本气仙沼“共有之家”

文章解读了赵扬设计的日本气仙沼"共有之家",该项目是第六届劳力士"创艺推荐资助计划"的一部分。作者指出这座建筑为日本"3·11"海啸灾后重建的"共有之家"项目提供了设计典范,建造了一个向气仙沼海港的渔民开放的共有社区场所。作者通过家之共有、建之共有、情之共有三部分解读了项目的概念、建造和使用。     

PLC在全自动太阳能制绒清洗设备中的应用

随着太阳能行业的高速发展,设备的自动化已成为太阳能硅片清洗设备的发展趋势。以全自动太阳能制绒清洗设备工艺流程为基础,介绍了欧姆龙PLC在全自动硅片清洗设备中的应用过程。     

援津巴布韦高清电视转播车视音频系统介绍

本文介绍了我国援助津巴布韦国家电视台高清电视转播车视音频系统的设备选型、系统设计思路。津巴布韦国家电视台目前主要采用标清和模拟系统设备,我国援助的高清转播车,实现了高清、标清的充分兼容,系统可扩展,实用、灵活、安全性。视频系统具有强大的备份功能,包括切换台和矩阵的相互备份,主备调音台的应急备份及录像机的应急备份等。     

Architecture Takes Time

Though condensed between the stages of design and completion, the conventional process of designing a building is time consuming, involving various stakeholders, planning processes and a wide team of consultants and contractors. What happens, though, if the time period of an architect's involvement is expanded? How might a more process-orientated approach shift the role of the architect? Tobias Armborst, Daniel D'Oca and Georgeen Theodore , principals of Interboro Partners in New York, describe how they have developed projects that have sought opportunities in expanding the timescale and remit of traditional practice.     

广播电台应急广播制播业务分析

本文对应急广播制播的背景和现状进行了介绍,分析了目前现有的制播业务体系,并对电台音频节目制作的主要技术规范和要求进行了说明;对应急广播信息的概念、事件类型、事件级别、信息来源、信息格式和信息展现进行了多角度分析,提出了广播电台应急广播制播业务体系,重点讨论了应急广播制播的业务架构、支持库、技术架构、业务功能以及安全要求等。     

无线传感器网络节点图像采集存储设计

为了监测和跟踪监控区域内的目标对象,提出了一种基于无线传感器网络节点的设计方案。随着高清图像传输速度越来越快、存储容量不断增大,使得每个节点的数据存储速率成为关键。以FPGA、DSP为控制核心,利用双片选交替双平面技术对混合编帧后的数据进行存储,实现了一种对图像的高速采集,并解决了数据存储速率的问题。通过对系统采集回的数据进行科学分析和图像还原,结果表明该设计能够可靠、有效的实现对图像信息的采集与存储。     

谈我省煤炭专网通信及信息网络系统改造

通过对我省煤炭专网通信与信息系统应用现状及存在问题的分析,论述了建立综合信息网络系统的必要性和可能性,并初步阐述了综合信息网络系统建设应遵循的规划目标和原则。     

Buffer Management Issues in the Implementation of Fast Interprocess Communication

This paper presents our experience with building a cross-domain object invocation mechanism that is conscious about memory usage. Cross-domain object invocation issues are very similar to cross-domain procedure call issues. Although the cross-domain procedure call performance issues have been discussed widely, there is very little reference to issues regarding space. It is a typical example of a case where the issues arising in practice are more complicated than the ones described in the reference literature. Our mechanism is discussed in terms of the Spring modular operating system, but the same principles are applicable to other operating systems. The Spring system is a distributed computing environment running on a networked collection of computers. Each individual Spring system is based around a microkernel known as the nucleus. The nucleus is structured to support fast and secure cross address-space object invocations. Most of the traditional operating system services are provided by servers running as user-mode domains. In a system such as Spring, fast, secure, and space-efficient cross-domain invocation is extremely important. Argument buffers are used to pass data from one process to another. For fast cross address-space procedure calls the maximum size of this buffer should accommodate a small number of page frames. In typical contemporary architectures this size varies between 5 and 10K. In a system such as Spring, where there is a large number of active calls, this size leads to excessive memory usage. Earlier measurements have shown that at run-time the marshalled form of the arguments of most of the calls is less than a hundred bytes. Copying page size objects is the only notable exception. Our implementation uses small 128 byte buffers by default. A very fast mechanism is used to extend the small buffer for calls with marshaled arguments that do not fit in the small buffer. Therefore, it is very space efficient and does not affect the overall system performance. Measurements from our implementation that support these claims are presented.