超声色带焊接机机械与电路设计

针对目前国内色带生产企业普遍采用电阻丝焊接的落后情况，在消化吸收世界先进技术的基础上，研制了具有高度自动化水平的超声波色带焊接机，经工厂五年多的实际应用，产品性能稳定可靠，整机和配件价格仅为进口同类产品的1/3。     

带状镁基牺牲阳极及其应用

采用挤压技术开发了一种带状镁基牺牲阳极产品，已经投入市场，镁带阳性特殊的形状和性能使其在阴极保护工程中有独特的应用，这些应用包括；长输管道，穿越管段，大型贮罐罐底，防雷击用的接地网以及复合阳极中的短期阳极等。     

一种改进的Ribbon snake遥感图像道路网自动生成算法

针对树木或高大建筑物遮挡以及噪声等因素造成道路提取结果不完整的现象,根据道路的几何特征,在Snake模型中加入道路宽度信息,构造Ribbon Snake模型。为了克服模型对内部参数依赖性较大、容易受到复杂背景干扰影响的不足,采用B样条曲线对道路的平滑性进行约束,与Ribbon Snake相结合建立道路提取算法,通过调节控制点的数目增强曲线的灵活性。从改进的B样条Ribbon Snake的道路网分割结果可以看出,分割的结果更加平滑,精度更高,对噪声具有更好的鲁棒性。     

基于MODIS遥感影像的云南山地气温垂直直减率场

常规气象观测站点获取气温直减率的缺点是代表性不足、同步性差、易受瞬时微气候变化的影响。提出了一种地表瞬时温度场获取气温垂直直减率场的微格局窗口差分方法,即使用气温场和数字高程模型,将气温垂直直减率看作是气温场关于海拔的一阶导数,用窗口像元栅格差分计算法近似代替一阶导数运算。对云南全区域和典型地貌区域上的直减率场空间格局进行目视解译和定量分析。结果表明:云南全境气温垂直直减率微格局变异大,随山体、盆地、湖泊、谷地等地物的走向,因微地形因子与大气环流间的复杂关系而垂直直减率表现出一定规则的变化,其中与垂直高差较大的山体的响应关系最为明显。垂直直减率随山体的高低起伏具有显著的分布特征,特别是深切的山体往往有两个呈条带状的直减率密集变化区,一处位于沟谷底部区域向山体坡面过渡带上,另一处位于山体中上部向山体顶部的过渡带上。城市周边与较大的水体周边也存在直减率急剧变化的分布带。本方法突破了传统站点观测方法的局限性,对探讨微格局气温垂直变化规律具有重要的意义。     

扁平绕带式压力容器钢带合理缠绕倾角的研究

通过大量扁平绕带式压力容器的爆破试验分析，结合压力容器安全使用的设计要求，提出扁平绕带式压力容器钢带的合理缠绕倾角范围，以保证该容器既安全又经济     

DEM simulation for optimal design of powder mixing in a ribbon mixer

A ribbon mixer is often employed in powder mixing in a wide range of engineering fields. The structure of the ribbon mixer is extremely complicated. This structure makes it difficult to understand the mixing mechanism by experimental approaches due to problems related to accurate sampling. At present, the mixing mechanism in the ribbon mixer is empirically identified as convection, despite a lack of precise assessment. Additionally, experimental investigations to find the optimal design of the ribbon mixer have not been sufficiently conducted because of its prohibitive cost. As such, there is a lack of sufficient discussion concerning the design for better mixing in the ribbon mixer. Numerical technologies represent a promising approach for solving the aforementioned problems. Significant improvements in computer hardware have enabled numerical models such as the discrete element method (DEM) to be positively employed in powder mixing. In the current study, an identification approach is developed for convective mixing, and besides, the study explores an effective parameter for better mixing in the ribbon mixer using the DEM. A swept volume measurement approach due to paddle movement is newly developed to identify the main mixing mechanism as convection. Sensitivity analyses are performed to find an effective parameter for better mixing. Through the sensitive analyses, the blade width is indicated as an important factor for achieving better mixing. Moreover, this study shows that the relationship between the swept volume and mixing index remains, even if the paddle width changes. Thus, the swept volume measurement method is revealed as useful for identifying the mechanism as convection in the ribbon mixer. Thus, not only novel finding regarding the blade width for better mixing but also the development of an approach for identifying convective mixing in the ribbon mixer is presented herein. Incidentally, convection being the dominant mechanism is consistent with the novel finding regarding blade width achieving better mixing.     

Big-data analysis of phase-formation rules in high-entropy alloys

Big-data analysis of phase-formation rules of high-entropy alloys (HEAs) was conducted and a phase for-mation rule from a dynamic view was deduced.It was indicated in literatures that cooling rate has a strong influence on the phase formation of HEAs.Higher cooling rate may promote the generation of amorphous phase, and accordingly suppress the formation of intermetallics.Meanwhile, it was also shown that cool-ing rate had little impact on the formation of solid-solution phase.To demonstrate this rule, a series of Fe-CoNi(AlSiB)x HEAs ribbons were fabricated by a melt-spinning technique, and the microstructure, me-chanical, and magnetic properties were also investigated.The results show that all ribbons exhibit disor-dered solid-solution structure.The addition of boron changes the alloy from ductility to brittleness, but without evident change of magnetic properties.The alloy in the nominal composition of FeCoNi(AlSi)0.2 has the best combination of mechanical and magnetic properties.A distinct feature of HEAs in magnetiza-tion was noticed and explained.     

用带状牺牲阳极对埋地钢管实施阴极保护时的电位和电流分布

用带状牺牲阳极对埋地长输钢管实施阴极保护时,沿着轴线方向的电位分布一定是均匀的。本文通过有限元法计算,进一步研究沿着管道圆周上的电位和电流分布的规律。结果表明,在研究的参数范围以内,沿着管道圆周的电位分布也是相当均匀的。土壤电阻率越低,电位极化值越大,但所需的保护电流也增大。防护性能好的涂层总是有利于阴极保护。阳极距离和管道外径对电位和电流分布没有什么影响。这些结果可以供工程上参考,同时说明用带状牺牲阳极对埋地长输钢管实施阴极保护是十分理想的。     

Current collecting channels in RGS silicon solar cells—are they useful?

Ribbon growth on substrate (RGS) silicon could be the crystalline silicon material for PV of the future. The extremely fast production technique avoiding any material losses due to sawing drastically reduces the wafering costs. On the other hand, one has to deal with more crystal defects (grain boundaries, dislocations, impurities), which especially limit the diffusion length and normally result in small short-circuit current densities J_sc. The charge carrier collection probability can be increased by a macroscopic V-texture of the surface, but even more effective would be a 3-dimensional emitter structure within the whole bulk cell volume. This was observed in some RGS solar cells showing minority carrier lifetimes of only around 0.4 μs after cell processing, but J_sc of above 34 mA/cm². In these cells, the whole bulk volume collects current despite the small diffusion lengths. This behaviour was investigated using spatially resolved lifetime and internal quantum efficiency mappings, capacitance measurements and a special EBIC technique, where the electron beam hits the backside of the wedge-shaped solar cell. From our results, we conclude that the collecting structures may be caused by inversion in combination with a high O content. Cells with large areas of collecting channels exhibit lower fill factors, but nearly no loss in open-circuit voltage as compared to the standard RGS cells. For both types of cells, confirmed record efficiencies of 12.5% have been obtained.     

Coagel Prepared from Aqueous Octyl β‐d‐Galactoside Solution

Structuring of semi‐crystalline networks in water systems is significant for a variety of industrial applications. In the present work, we investigated the coagel formation from aqueous octyl β‐d ‐galactoside (C₈‐β‐Gal) solutions and characterized the crystal structure and crystallite network in the prepared coagel. Differential scanning calorimetry (DSC) confirmed that the Krafft boundary temperature (T_K) is 32–35 °C for C₈‐β‐Gal concentrations below 30 wt% and a knee of the Krafft boundary exists around 2.5 wt% C₈‐β‐Gal concentrations. The addition of NaCl increased T_K slightly because of the salting‐out effect. Powder X‐ray diffraction (PXRD) analysis, field‐emission scanning electron microscopy (FE‐SEM) and atomic force microscopy (AFM) observations revealed that the coagel is comprised of the three dimensional bundled semi‐crystalline network consisting of a “ribbon crystal phase” of hemihydrate crystals. Moreover, the excellent ability of C₈‐β‐Gal to form a macroscopically homogeneous coagel was demonstrated by the comparison with other representative mono‐alkylated glycoside’ systems containing octyl a‐d ‐glucoside or dodecyl β‐d ‐glucoside. Persistence of the liquid phase without liquid–liquid phase separation prior to and during the coagel formation was a key factor for the preparation. A novel coagel was obtained from a principal synthetic galactoside.