Design of large-angle distortion-free and spot adjustable LED spot array projector based on microlens array and eyepiece

The spot array projector has long been a challenging and intriguing research focus in the fields of projection and lighting applications. In the current literature, there is a lack of a comprehensive and detailed presentation on the design and analysis method for a spot array generator based on the structure of imaging eyepiece and MLA. We present a novel design and optimization method for a large-angle, distortion-free and spot adjustable LED spot array projector that is composed of an eyepiece, two microlens arrays (MLAs), and a micro-LED array (MLEDA). The eyepiece system is optimized using imaging optical methods to project sub-beams to the target plane with a large angle. The sub-lens of condenser MLA is also optimized using imaging optical methods to refocus the collimating beam and match the numerical aperture (NA) with the eyepiece, and the sub-lens of the collimating MLA is acquired by using simulated annealing (SA) global illumination optics optimization method to achieve collimation and far-field homogenization. The predistortion MLEDA and the MLAs are proposed and implemented by the radial basis function (RBF) interpolation method, which correct the large-angle distortion introduced by the eyepiece. Both near-field and far-field applications can be realized by the proposed system. In the near-field applications, different spot geometries at the near-field target plane can be achieved. In the far-field applications, the power matching of the MLEDA is used to improve far-field uniformity of spot array. Moreover, the predefined-geometry arrangement spot array can be realized in both near and far fields. Two design examples with full field of view (FOV) projection of 80° and 100° are provided to validate the proposed method. Overall, the proposed system offers a promising solution for various applications requiring target identification or 3D calibration.     

新建城市区域防洪方案探讨

新建城市区域是城市的重要组成部分,新建城市的防洪是城市防洪规划面临的新课题。在分析杭州市良渚组团区域防洪问题的基础上,明确新建城市区域防洪规划的基本原则,选取合理的防洪标准,通过对拟定防洪方案的对比分析,确定了经济合理、技术可行的防洪体系建设方案,并提出通过建立有效的技术及管理体系等措施。     

基于粒子群算法的室内环境节能优化控制

目前建筑室内环境节能优化控制大多侧重于室内空调、照明等各分系统的独立优化控制,但从能量消耗角度来考虑,如何兼顾各个系统的耗能,使整体耗能最小是最节能的。针对这一问题,提出了一种基于粒子群算法的节能综合控制,通过寻找窗帘开启的最优角度,调节高精度电动窗帘满足室内光环境需求,降低照明能耗,同时将日射得热引起的空调冷负荷降到最低,使整体效能最佳,从而提高系统的效率。实验结果表明,该控制方案综合考虑了照明能耗和空调能耗的合理分配,能为建筑物整体能耗节约了大约30%的能耗。     

改进的超波束形成算法探讨及性能研究

为进一步提高超波束形成(Hyper Beam Forming,HBF)算法的性能,在传统的HBF基础上提出一种改进的HBF(Improved Hyper Beam Forming,Im-HBF)算法。将基于半阵指向性函数高阶运算修正到基于全阵指向性函数的高阶运算。仿真结果表明,Im-HBF算法具有更窄的主瓣,并且对端射来波信号栅瓣抑制能力更强,进一步提高了对目标的检测能力。同时,Im-HBF算法对指数n具有更为广泛的适用性,当指数n2时也能获得优于常规波束形成(Conventional Beam forming,CBF)的波束性能。     

某路槽滑坍事故及整体稳定分析

本文介绍了某路槽工程概况、滑坍状况及滑坍以后地质勘察揭示的水文、地质情况和滑体形状。还就带撑地下连续墙支挡结构进行了整体稳定性理论分析，理论分析与工程实际相符     

钢铁企业开发非传统水资源的工程实践

提出了将城市生活污水深度处理后用于钢铁工业的思路,介绍了城市污水深度处理方案的选择和工艺处理流程的确定,积极开发非传统水资源。     

HACCP system – hazard analysis and assessment,based on ISO 22000:2005 methodology

Food Safety is a fundamental public health concern, and achieving a safe supply poses major challenges for organisations involved in the food chain. A vide number of food borne hazards, both familiar and new, pose risks to health and obstructions to international trade in foods. These hazards must be properly analysed, assessed and managed to meet growing and increasingly complex sets of global food chain. Proper implementation of food hygiene principles across the food chain in conjunction with Hazard Analysis and Critical Control Point System will ensure food safety. To achieve this, a procedure for hazard analysis and assessment based on ISO 22000:2005 methodology has been developed. The hazard assessment, selection and assessment of control measures, Operational prerequisite programme Plan and HACCP Plan have been summarized in comprehensive tables.     

符合尼玛标准的防爆超高效三相异步电动机研制

简要介绍了研制的符合尼玛标准的防爆超高效三相异步电动机的主要技术参数与结构设计特点.该电机采用优质硅钢片与退火工艺降低铁耗、低谐波绕组降低铜耗、特殊转子表面加工和酸洗工艺降低杂耗等.同时介绍了UL的防爆规范.     

氮丙啶类交联剂的合成及其在水性涂料中的应用

水性涂料正在逐渐取代溶剂型涂料，交联剂在水性涂料中的作用不可或缺。在合成一系列氮丙啶类交联剂的基础上，通过应用性实验对它们的性能进行了考察。     

不同表面处理的TPO防水卷材上覆材料性能影响研究

因市场与建筑造型的需求,设计和施工时对TPO防水卷材提出了表面覆真石漆和装饰砂浆的要求。通过对织物增强型TPO防水卷材表面进行打磨、涂刷界面处理剂等方式处理后,在其表面喷涂真石漆和装饰砂浆,标准养护后进行拉拔、弯折、浸泡等试验,从而判断各方案的使用价值及实际防水装饰效果。试验表明,织物增强型TPO防水卷材表面打磨处理后再覆真石漆或装饰砂浆,在非浸水环境下满足使用要求,但浸水后上覆的真石漆或装饰砂浆容易脱落,不满足实际应用要求。