基于投影匹配的钢坯端面字符快速识别方法

由于高温及复杂光照的干扰等成像环境的影响,钢坯端面字符自动识别存在很多困难,其实时自动识别难度大。现存的字符识别方法难以适应实际生产现场的需求。文章提出了一种基于投影匹配的快速识别方法,通过将图象二值化后进行垂直投影,直接将一维投影结果进行模板匹配,降低运算维数。大量的现场实验证明,该方法可有效的减少识别时间,提高生产效率,字符的拒识率和误识率较低,可满足生产线的实时要求。     

基于SSH架构的社区卫生管理系统设计与实现

针对传统社区卫生管理系统开发的不足,基于J2EE企业级应用开发平台,整合Struts、Spring和Hibernate（SSH）开源框架技术,提出了一种多层社区卫生管理信息系统模型,实践表明,该整合框架在构建复杂业务系统中提高了开发效率和系统的可维护性,同时增强了系统的可扩展性。     

大气湍流图像像素偏差机理分析

对大气湍流导致图像畸变和像素偏差的因素进行了深入分析,对大气湍流状态下激光发射远距离光束的光束漂移均方值进行仿真,分析光束漂移均方值曲线,为后续对图像畸变、像素偏差校正及克服湍流影响提供有效的理论依据。     

工程图学课中的能力培养与实体建模技术

论述了工程图学引入"融入式"教学的必要性,提出在工程图学课程体系中融入实体建模技术的基本思路.     

多星侦察移动目标：一种基于潜在区域的求解策略

针对面向移动目标侦察的多星联合调度,提出了一种新颖的求解策略:将移动目标问题转变为区域目标问题,即在多星联合侦察的框架内利用电子侦察引导信息构建移动目标的潜在区域,基于约束满足问题(CSP)描述方法以最大覆盖率为目标建立了面向潜在区域目标的多星联合调度模型,并提出了相应的禁忌搜索算法。通过基于潜在区域的求解策略,可以优化星载遥感器的侦察方案,指导移动目标侦察任务的执行。     

佛手凉果加工过程中功能性成分与抗氧化性分析

佛手凉果是具有功能特性的岭南特色凉果品种,探究佛手凉果制作过程中功能性成分及其体外抗氧化活性变化规律,可为佛手凉果产业工艺优化与改良提供依据。结果表明,加工提高了佛手中总酸、多糖、黄酮和膳食纤维含量,导致多酚含量下降。制作过程中,1,1－二苯基－2－三硝基苯(DPPH)自由基、2,20 -联氮- 2 -三硝基苯肼(ABTS)自由基清除能力和铁离子还原抗氧化能力(Ferric Reducing Antioxidant Power, FRAP)呈现先下降后上升的趋势,效果分别是新鲜佛手的1.35倍、1.57倍和2.16倍。总黄酮与FRAP之间呈现极显著相关性(P＜0.01);与DPPH、ABTS呈显著相关性(P＜0.05);有机酸、总多糖分别与ABTS和FRAP之间相关性(P＜0.05)。为此,在佛手凉果的制作过程中,糖制和干燥工艺对功能性成分的转化与浓缩起关键作用,可作为工艺优化的重点。     

Boosted Photocurrent via Heating BiFeo3 Thin Film for UV Photodetector at Wide Temperature Range

The current research on ferroelectric photovoltaic materials is concentrated on enhancing the output photocurrent. As solar cells operate at high temperatures, it is crucial to take into account the effect of increasing temperatures on ferroelectric photovoltaics. In this study, an LNO (lanthanum nickelate, LaNiO₃)/BFO (bismuth ferrate, BiFeO₃)/ITO (indium tin oxide) device is constructed on a mica substrate by sol–gel method. The device achieves output photocurrent enhancement at a wide temperature range (33–183 °C), with the largest photocurrent enhancement at 130 °C, which is 178% relative to room temperature, and the output power is also increased by 9.88 times. At the same time, compared with BFO bulk, it is found that the performance of BFO film is always higher than that of bulk in the test temperature range, and the output photocurrent of BFO film at room temperature is 104 times higher than that of bulk. This article investigates the effect of high temperatures on ferroelectric photovoltaics and also provides a strategy for enhancing the photovoltaic performance of ferroelectric films, providing guidance for future applications of ferroelectric films in flexible solar cells and other applications.     

The Edge Effects Boosting Hydrogen Evolution Performance of Platinum/Transition Bimetallic Phosphide Hybrid Electrocatalysts

Platinum (Pt) is regarded as a promising electrocatalyst for hydrogen evolution reaction (HER). However, its application in an alkaline medium is limited by the activation energy of water dissociation, diffusion of H⁺, and desorption of H*. Moreover, the formation of effective structures with a low Pt usage amount is still a challenge. Herein, guided by the simulation discovery that the edge effect can boost local electric field (LEF) of the electrocatalysts for faster proton diffusion, platinum nanocrystals on the edge of transition metal phosphide nanosheets are fabricated. The unique heterostructure with ultralow Pt amount delivered an outstanding HER performance in an alkaline medium with a small overpotential of 44.5 mV and excellent stability for 80 h at the current density of −10 mA cm⁻². The mass activity of as-prepared electrocatalyst is 2.77 A mg⁻¹_Pt, which is 15 times higher than that of commercial Pt/C electrocatalysts (0.18 A mg⁻¹_Pt). The density function theory calculation revealed the efficient water dissociation, fast adsorption, and desorption of protons with hybrid structure. The study provides an innovative strategy to design unique nanostructures for boosting HER performances via achieving both synergistic effects from hybrid components and enhanced LEF from the structural edge effect.