摘要：This paper describes a novel finite element thermal analysis model for an AIGalnP-LED micro-array device. We also conduct a transient analysis for the internal temperature field distribution of a 5x5 array device when a 3x3 unit is driven by pulse current. In addition, for broader applications, a simplified thermal analysis model is introduced and its accuracy is verified. The internal temperature field distribution of 100xl00 units is calculated using the simplified model. The temperature at the device center reaches 360.6 ℃ after 1.5 s. In order to solve the heat dissipation problem of the device, an optimized heat dissipation structure is designed, and the effects of the number and size of the heat dissipation fins on the thermal characteristics of the device are analyzed.

摘要：目的 建立一种基于实时荧光重组酶聚合酶扩增（recombinant polymerase amplification,RPA）技术快速检测创伤弧菌的方法。方法 根据编码创伤弧菌溶血素vvhA基因的保守序列设计RPA引物，通过琼脂糖凝胶电泳筛选出最佳引物；根据筛选出的引物设计实时荧光探针，并建立实时荧光RPA检测体系。通过检测金黄色葡萄球菌、粪肠球菌、铜绿假单胞菌、河流弧菌、溶藻弧菌等10种其他菌种评价检测体系的特异性；通过检测梯度稀释的创伤弧菌基因组DNA评价检测体系的灵敏度。用qPCR试剂盒平行检测10例模拟临床样本，验证检测体系的性能。结果 基于创伤弧菌vvhA基因保守序列建立起实时荧光RPA检测体系，该体系对金黄色葡萄球菌等10种其他菌种基因组DNA均无交叉反应。检测创伤弧菌的灵敏度为1×10～2 CFU/mL；检测模拟临床样本结果与qPCR方法的结果一致，准确率和检出率均为100%。结论 本研究建立的实时荧光RPA检测创伤弧菌方法灵敏度高、特异性强，操作简单快速，为创伤弧菌的现场快速检测提供一种新途径。

摘要：TiO2 pigments are typically coated with inert layers to suppress the photocatalytic activity and improve the weatherability. However, the traditional inert layers have a lower refractive index compared to TiO2, and therefore reduce the lightening power of TiO2. In the present work, a uniform, amorphous, 2.9-nm-thick TiO2 protective layer was deposited onto the surface of anatase TiO2 pigments according to pulsed chemical vapor deposition at room temperature, with Ti Cl4 as titanium precursor. Amorphous TiO2 coating layers exhibited poor photocatalytic activity, leading to a boosted weatherability. Similarly, this coating method is also effective for TiO2 coating with amorphous SiO2 and SnO2 layers. However, the lightening power of amorphous TiO2 layer is higher than those of amorphous SiO2 and SnO2 layers. According to the measurements of photoluminescence lifetime, surface photocurrent density, charge-transfer resistance, and electron spin resonance spectroscopy, it is revealed that the amorphous layer can prevent the migration of photogenerated electrons and holes onto the surface, decreasing the densities of surface electron and hole, and thereby suppress the photocatalytic activity.

摘要：文章对电流连续工作模式(CCM)下LCC谐振变换器的工作模态进行了分析,在此基础上采用基波近似法对LCC谐振拓扑进行了简化,推导出LCC谐振变换器的基波纯阻性和基波容性等效电路,建立了与开关频率、负载及变换器增益有关的数学模型.结合模型,提出了宽范围输入输出电压LCC谐振拓扑的设计方法,基于此方法结合一套电源设计指标设计了一组谐振参数.通过仿真验证了所设计的LCC谐振变换器在宽范围输入输出电压条件下可实现全负载范围的软开关,满足设计指标,证明了模型和设计方法具有较高精准度和良好应用价值.

摘要：为了提高热设计的设计效率,基于热传导、流体换热、流体力学理论,对典型强迫风冷散热系统进行精确建模,对精确模型进行简化方法的研究.使用该简化热模型,可以对强迫风冷散热系统进行快速、准确的设计.采用该简化热模型设计的380 V/50 kVar SiC-MOSFET静止无功补偿器(SVG)的工业化样机,散热器表面温升误差为4.1℃(满载条件),满足工程化设计的要求.

摘要：提出了一种考虑组件保形要求的组件布局-结构拓扑的多组件结构系统布局优化设计方法。在传统的多组件结构系统布局优化设计基础上,定义了组件设备的弹性应变能函数并用其定量衡量组件设备的弹性变形程度,在多组件结构系统布局优化过程中,采用组件设备的弹性应变能函数作为其保形设计约束,以实现抑制承载组件变形的设计目的。解析了组件设备保形设计约束对结构拓扑及组件布局设计变量的灵敏度,研究了组件保形设计约束与结构系统整体刚度之间的消长关系,分析了组件保形约束对组件布局及支撑结构材料拓扑分布的影响,在考虑组件保形设计约束的挂架系统布局优化模型中引入了系统的质心位置约束并完成了其解析灵敏度求解。通过数值算例,实现了考虑组件保形、材料用量分数、质心位置约束的多组件结构系统布局优化设计。数值算例的计算结果表明,引入组件保形约束的多组件结构系统布局优化设计方法能够有效抑制传力路径上参与承载的组件设备的弹性变形,实现组件设备的保形设计。

摘要：Taking advantage of the new standard HTML5,we designed an online tool called a browser/server-based glaucoma image database builder(BGIDB)for the demarcation of the optic disk and cup’s ellipse-like *** B-spline interpolation algorithm is used,and a specially designed algorithm is proposed for classifying the disease grade according to the disc damage likelihood scale criterion,which is correlated strongly with the glaucoma process by *** tool exhibits the best performance with a low overlapping error of 4.34%for the optic disk demarcation and 8.31%for the optic cup *** also has preferable time-consuming as compared to other tools and is a cross-platform *** tool has already been utilized in building the ophthalmic image database in the cooperation of Center for Ophthalmic Imaging Research and The Second Xiangya Hospital.

摘要：分析了基于多级微反射镜的傅里叶变换红外光谱仪(FTIR—Fourier transform infrared spectrome-ter)中扩展光源对光谱复原的影响,计算了干涉强度与光源立体角之间的关系。分析表明,扩展光源存在的立体角导致系统的相干长度变短,光谱分辨率降低。当扩展光源的立体角小于0.001时,系统的分辨率接近理论设计值。减小光源尺寸会降低系统的光通量。因此,需要在设计中结合系统信噪比的要求,选取合适尺寸的扩展光源。

摘要：针对伪码连续波跟踪测量雷达,提出了一种信号捕获参数设计方法.该方法利用快速傅里叶变换(FFT)捕获算法将接收信号和本地再生信号的时域相关运算转换成频域的频谱相乘运算,从而大大减少捕获时间,并引入非相参积累以提高对弱信号的检测能力,通过Tong判决算法保证系统总的虚警概率满足要求.在给定的技术指标下对非相参积累次数和Tong判决算法进行了参数设计.仿真结果表明,所提出的信号捕获参数设计方法可以满足低信噪比下预定的检测概率和虚警概率要求.

摘要：为保证涡轮流道型线设计结果的光滑性,发展了一种先反设计初始流道,再进行光滑流道优化的轴流涡轮一维优化设计方法。设计方法针对涡轮中径处气动参数计算,求解一维流动控制方程,采用能量损失和速度损失系数模型,考虑冷气掺混和变比热影响;并结合了遗传算法,以提升等熵效率为目标,对流道几何、级功率分配和速度三角形参数进行优化。利用设计方法对两台文献涡轮进行了验证设计,对一台四级涡轮进行了优化设计。通过分析结果可知,设计方法可以有效设计光滑涡轮流道并提升等熵效率;流量、膨胀比和等熵效率计算较为准确,级载荷系数和流量系数分布计算较为可靠;叶排出口气流角误差绝对值的平均值在3.2°以内,马赫数误差绝对值的平均值在0.054以内;叶排损失随级数变化趋势基本准确。