光导管照明系统设计及工程应用

从天然采光的理念着手,介绍了光导管照明系统的概念,对系统中各部件的构成作了简要说明,并对光导管系统与传统照明的节能进行了分析比较。结合某工程现场要求,提出光导管照明系统设计思路和方案,并实际投入应用,随后对不同时段及不同天气条件下光导管照明效果进行测评及分析。结合工程实际状况及局限性,对工程上光导管系统设计及广泛应用提出建议,以期为同行提供参考。     

LED路灯照度测试系统设计与研究

着重介绍了一套低功耗、高性价比的小型化LED路灯照度测试系统的设计思路,该系统由基于LabVIEW的主控平台、SQL后台数据库、智能测试小车,以及小车上的各种传感系统和照度采集系统组成,可自动对LED路灯照度进行较精准的采集、精细化计算分析,并依照相关国家标准自动对测试结果进行量化评估.系统的设计形成了有效便捷的测试理论和方法,并可将测试和评估结果以数据分析报表形式直观易识地呈现,数据分析报表支持实时网络查询与共享功能.该系统产生的评估结果将为城市LED路灯改造工程提供全面的、客观科学的依据.     

真空玻璃平板光伏构件光学物理性能检测与应用

本文首先介绍了真空玻璃平板光伏构件,然后根据相关标准测试该种构件的光学物理性能,最后分析该种构件在全国各气候分区的应用适宜性。     

新型组合钢板剪力墙单元的抗剪承载力

提出一种适用于钢框架结构体系的新型组合钢板剪力墙形式。对4种宽厚比的纯钢板和1种组合钢板剪力墙单元的静力加载试验的结果表明：宽厚比决定了钢板初始抗侧性能和屈曲模态;小宽厚比钢板对边界约束条件较为敏感;预制墙板对提高剪力墙单元抗剪承载力和提高屈曲荷载有一定帮助,但是对钢板抗侧性能的贡献不大。通过数值模拟增加影响参数,对新型组合钢板剪力墙单元进行了理论分析。最后给出了三边固接一边弹性约束的钢板及组合钢板剪力墙单元的抗剪承载力计算公式,并依据成品预制墙板的规格尺寸给出了组合钢板剪力墙适用的预制墙板最小厚度选择方法。     

隔热涂料在轻质油品储罐上的应用

本文主要介绍了凉凉隔热胶和ＨＤ控温漆具有良好的隔热性能和较好的反幅射的性能,能有效地改善罐壁温升和传热。使用这两种涂料后,即使在夏天日照时,罐壁温度也在４５℃以下,这样就可停用液化气,丙烯等球罐的喷淋水,并减少轻质油品拱顶罐的油气排放。     

利用光束变换元件实现彩虹全息图的边缘照明

在分析原有各种边光照明方法是基础上提出一种利用全息光束变换元件实现全处图边缘照明的新途径,该法优点是不需要厚重玻璃衬板,光能利用率高,重现像亮,易于把全息图制成平面一体化构架,便于携带。     

物体表面色的双光束平行检测

介绍了一种用于物体表面色检测的双光束多通道系统,采用脉冲光源模拟标准Ｄ６５有,由ＳＰＤ对颜色进行光谱的平探测,经过精密的光谱定标和光度定标,并结合软件功能,实现了物体色的快速精测量。     

Impact of UV radiation on activity of linear furanocoumarins andBacillus thuringiensis var.Kurstaki againstSpodoptera exigua: Implications for tritrophic interactions

Acidic fogs with a pH of 2.0 and duration of 2 hr did not reduce the efficacy ofBacillus thuringiensis var.Kurstaki (Berliner). Therefore, the impact of UV radiation was investigated on the interactions between (1) levels of the antibacterial linear furanocoumarins psoralen, bergapten, and xanthotoxin inApium graveolens (L.) occurring following a 2.0 pH acidic fog episode, (2) the noctuidSpodoptera exigua (Hübner), and (3) a sublethal dosage of the microbial pathogenB. thuringiensis var.Kurstaki. Mean time to pupation in the absence of UV radiation (survival was too low to conduct this analysis for insects exposed to UV) was significantly extended by the addition of either psoralens orB. thuringiensis. Larvae developing on diets containingB. thuringiensis plus psoralens required nearly 40% longer to pupate than controls, but their effects were additive as the interaction was not significant. Although the mean times to adult emergence were significantly different, time spent in the pupal stage did not vary significantly between treatments, indicating that increases in larval developmental time were responsible for the observed decrease in developmental rate. Mean time to mortality, a weighted average time of death, was not significantly affected by any of the treatments. In a 2 × 2 × 2 factorial analysis, all main effects (linear furanocoumarins.B. thuringiensis, UV radiation) reduced survival significantly, as did the three-way interaction. Thus, antagonistic interactions with psoralens that would reduce the effectiveness ofB. thuringiensis in the field were not observed. When pairs of main effects were nested within the two levels (presence and absence) of the third factor, several two-way interactions were found. Interestingly, the activity ofB. thuringiensis and the psoralens, individually or in combination, was enhanced by exposure to UV radiation. Implications of this research are discussed for both natural and agricultural ecosystems.Lepidoptera: Noctuidae.     

Scaling laws and polystyrene networks: a quasi-elastic light scattering study

Randomly crosslinked networks with a range of crosslink densities were prepared by γ-irradiation. Quasielastic light scattering measurements were made on the gels swollen to equilibrium in cyclohexane at 308, 318 and 333 K. The longitudinal osmotic modulus M_os was obtained from the intensity of the dynamically scattered light, and the cooperative diffusion coefficient D_c calculated from the relaxation rate of the autocorrelation function. The concentration dependence of these parameters at the theta temperature was found to be consistent with the scaling predictions, but at higher temperatures where excluded volume conditions prevail, deviations from scaling behaviour were observed. These discrepancies are probably caused by defects in the network structure.     

A study of the static and dynamic properties of side-chain liquid crystalline polymers in low molar mass mesogens

The static and dynamic properties of solutions of a side chain polysiloxane liquid crystal polymer have been studied in a cyanobiphenyl nematic host as a function of concentration and temperature. Refractive index measurements were carried out on aligned samples and the data used to determine the macroscopic order parameter, S, using Haller's method. Photon correlation spectroscopy has been used to measure ($\text{k}{}_{22}\text{γ}{}_1$) for the pure nematic solvent and the solutions. From these measurements it appears that the static properties vary slowly and linearly with increasing polymer concentration whilst the dynamic or viscoelastic properties change markedly. This change has been attributed to γ₁, the twist viscosity, and the results have been discussed in terms of the function of the siloxane polymer backbone.