体育照明中金属卤化物灯用电源装置（SPS）的技术要求

本文给出了体育照明中金卤灯用电源装置（SPS）的技术要求，解释和说明技术要求的原因，指出SPS的选用要点。     

监控量测在双洞连拱隧道中的研究与应用

结合具体工程实例，介绍了连拱结构的设计与施工，提出了施工监控实施方案，对量测数据进行了分析，成功地对双洞连拱隧道围岩的地质变化情况进行了动态预测，避免了重大事故的发生。     

无粘结环锚预应力衬砌锚具槽布置方式对比研究

无粘结环锚预应力衬砌锚具槽是整个预应力衬砌受力的关键部位,其位置的选择对于整个预应力衬砌受力和安全而言至关重要。结合引松供水工程有压输水隧洞无粘结预应力衬砌结构,采用等效荷载法和实体建模相结合的方法进行Flac3D三维建模,对锚具槽单排和双排布置时的衬砌关键部位受力情况进行了分析。计算结果表明:(1)无粘结环锚预应力衬砌的下半环因锚具槽的影响,会存在局部预应力缺失和分布不均,而单排锚具槽布置能减小衬砌预应力的不均匀性。(2)锚具槽及附近区域是预应力衬砌的薄弱区,衬砌拉应力区主要分布在锚具槽环向的临空面附近,衬砌受压最大区域分布在相邻锚具槽之间。(3)双排锚具槽布置型式抗超载能力优于单排锚具槽布置型式。     

关于节能照明开关的探讨

建筑照明存在的电能浪费，原因之一是由于照明开关功能单一、参数不易改变所致。分析了传统的翘板、声光控、人体感应（红外线）、定时和遥控开关性能，介绍一种新型节能照明开关，该开关综合了传统与节能模式的双重功效，可根据使用的不同要求设置开关时间。     

风积沙隧道安全施工技术方案

结合具体工程实例，阐述了隧道在西北区风积沙典型地质中安全施工的技术方案和工艺控制，对其开挖方法、支护措施及工序衔接问题进行了探讨分析，以期成功地解决风积沙地区成孔困难的问题。     

电子技术在绿色照明电路中的应用

近几年,随着科技的发展与进步,电子技术的发展逐渐的加快,各行各业对电子技术的应用也逐渐的趋于广泛。由于社会经济发展的加快,对能源的消耗逐渐的加剧,这也就促进了绿色照明技术的发展,其主要是对传统照明技术的创新,并在一定的程度上加剧了能源的节约。在绿色照明中加入信息技术也就是加速低碳社会的发展与进步。本文主要对电子技术在绿色照明电路中的应用进行分析,并对其发展的前景进行探索。     

浙江中控智能照明系统在罗定国际酒店的应用

本文主要介绍了浙江中控智能照明系统的特点及其在罗定国际酒店的应用，并在此基础上分析了应用该系统之后的收益。     

Considerations of rock dilation on modeling failure and deformation of hard rocks-a case study of the mine-by test tunnel in Canada

For the compressive stress-induced failure of tunnels at depth, rock fracturing process is often closely associated with the generation of surface parallel fractures in the initial stage, and shear failure is likely to occur in the final process during the formation of shear bands, breakouts or V-shaped notches close to the excavation boundaries. However, the perfectly elastoplastic, strain-softening and elasto-brittle-plastic models cannot reasonably describe the brittle failure of hard rock tunnels under high in-situ stress conditions. These approaches often underestimate the depth of failure and overestimate the lateral extent of failure near the excavation. Based on a practical case of the mine-by test tunnel at an underground research laboratory (URL) in Canada, the influence of rock mass dilation on the depth and extent of failure and deformation is investigated using a calibrated cohesion weakening and frictional strengthening (CWFS) model. It can be found that, when modeling brittle failure of rock masses, the calibrated CWFS model with a constant dilation angle can capture the depth and extent of stress-induced brittle failure in hard rocks at a low confinement if the stress path is correctly represented, as demonstrated by the failure shape observed in the tunnel. However, using a constant dilation angle cannot simulate the nonlinear deformation behavior near the excavation boundary accurately because the dependence of rock mass dilation on confinement and plastic shear strain is not considered. It is illustrated from the numerical simulations that the proposed plastic shear strain and confinement-dependent dilation angle model in combination with the calibrated CWFS model implemented in FLAC can reasonably reveal both rock mass failure and displacement distribution in vicinity of the excavation simultaneously. The simulation results are in good agreement with the field observations and displacement measurement data.     

关于照明设计与照明节能若干问题的探讨

本文拟就照明设计与照明节能方面的一些典型问题提出来进行分析、探讨。     

Internal pressure dynamics of a leaky building with a dominant opening

A simplified and computationally efficient model of internal pressure response of a building with a dominant opening and background leakage is presented based on certain simplifications shown to be adequate for all practical purposes. The presented model adequately linearized is used to develop closed form non-dimensional design solutions that can be used to estimate the ratio of internal to external pressure fluctuations and gust factors for a range of building volumes, opening sizes and porosity ratios. Experiments carried out with different combination of leakages in the presence of dominant openings of various sizes are used to justify the simplifications adopted in the derivation of the model and validate the model predictions. A performance analysis of the model carried out in conjunction with some approaches found in the literature on benchmarking data exhibits the relative advantage of the model in terms of accuracy, practical usage and computational expense.