大直径圆轴残余剪应力的计算

从受扭圆轴M—φ图的相互换算公式出发,利用Nadai公式,推导出大直径受扭圆轴经弹塑性状态后的残余剪应力计算公式,计算简便、准确,在理论上较好地解决了这一问题,并弥补了各种实测法的不足。     

ADSP2101FEL－ICE开发系统

本文介绍了一种数字信号处理器（ＡＤＳＰ－２１０１）的开发系统──ＡＤＳＰ２１０ＩＦＥＬ－ＩＣＥ。描述了它的基本功能和设计思想。     

从氰渣中浸取金、银试验研究

对采用高酸催化氧化浸出氰渣中的氧化铁,从浸铁渣中用常规氰化浸出金、银等贵金属进行了研究.氰渣高酸催化浸出时保持35%的矿浆浓度、加入1.3倍硫酸理论用量、在100℃下反应2.5h,铁的浸出率可达97.80%;浸铁渣常规氰化金、银的浸出率分别可达87%和80%.该方法可有效浸出回收氰渣中的金、银.     

三峡库区中咀坡大坝筑坝材料碾压试验

后溪河水电站中咀坡大坝为混凝土面板堆石坝,在填筑前进行了大型碾压试验。针对不同填筑区筑坝材料的铺料厚度、铺料方式、碾压遍数、碾压速度、加水量等施工参数进行碾压试验,在获得大量真实有效试验数据的基础上,运用数理统计和EXCEL图表分析法对试验数据进行了综合分析,据此确定合理的施工参数。通过对碾压试验资料的分析提出了合理的填筑施工参数及质量控制指标,并且该工程的碾压试验结果也可为同类工程建设参考。     

虚拟仪器设计中时间插补器的研究

本文首先简要介绍了虚拟仪器的定义和特点,然后根据积分电路原理和设计原则,设计了一种测试触发信号短时间间隔的新方法-时间插补器,通过对被测信号的控制,将被测时间转换,完成虚拟仪器中的部分设计任务.     

Enhanced π–π Interactions of Nonfullerene Acceptors by Volatilizable Solid Additives in Efficient Polymer Solar Cells

Fine‐tuning of the nanoscale morphologies of the active layers in polymer solar cells (PSCs) through various techniques plays a vital role in improving the photovoltaic performance. However, for emerging nonfullerene (NF) PSCs, the morphology optimization of the active‐layer films empirically follows the methods originally developed in fullerene‐based blends and lacks systematic studies. In this work, two solid additives with different volatilities, SA‐4 and SA‐7, are applied to investigate their influence on the morphologies and photovoltaic performances of NF‐PSCs. Although both solid additives effectively promote the molecular packing of the NF acceptors, due to the higher volatility of SA‐4, the devices processed with SA‐4 exhibit a power conversion efficiency of 13.5%, higher than that of the control devices, and the devices processed with SA‐7 exhibit poor performances. Through a series of detailed morphological analyses, it is found that the volatilization of SA‐4 after thermal annealing is beneficial for the self‐assembly packing of acceptors, while the residuals due to the incomplete volatilization of SA‐7 have a negative effect on the film morphology. The results delineate the feasibility of applying volatilizable solid additives and provide deeper insights into the working mechanism, establishing guidelines for further material design of solid additives.     

FAE武器威力评价方法探讨

FAE武器的威力评价方法应包括自身威力评价和毁伤效应评价两个方面,在对既有FAE武器威力评价方法发类评价的基础上,本文结合FAE武器爆炸场特性,综合该武器的各种爆炸作用形式,并兼顾科学与实用的原则,提出了FAE武器自身威力评价方法,研究表明,用FAE爆轰能和广义TNT当量两个指指来评价FAE自身威力能全面反映FAE武器爆炸场持性,适合于FAE武器间的威力对比以及FAE武器与HE武器的威力对比,该评价方法具有普遍性。     

Comparison of modified injection molding and conventional machining in biodegradable behavior of perforated cannulated magnesium hip stents

In this study,perforated cannulated magnesium(Mg)hip stents were fabricated via modified Mg injection molding and conventional machining,respectively.Additionally,the stent canal was filled with paraffin to simulate injection of biomaterials.The microstructure,mechanical performance,corrosion behavior,and biocompatibility were comparably studied.Scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS)showed higher affinity of interstitial element such as oxygen and carbon as consequences of routine molding process.After immersion in SBF,machining stents showed reduced degradation rate and increased deposition of calcium phosphate compared to molding stents.Corrosion resistance was improved via paraffin-filling.Consistently,the hemolysis and in vitro osteoblast cell culture models showed favourable biocompatibility in machining stents compared to molding ones,which was improved by paraffin-filling treatment as well.These results implied that the feasibility of the prepared machining stents as the potential in vivo orthopaedic application where slower degradation is required,which could be enhanced by designing canal-filling injection of biomaterials as well.     

提高水电供区供电质量的思考

本文通过调查了解,分析了小水电供区供电质量存在的问题,并结合安徽水电岳西有限责任公司所属电网实际情况提出一些解决方案。     

基于PSO-SVM模型的液压系统故障诊断

针对液压系统在使用中故障频率较高、诊断方法受各种因素影响以及诊断准确率较低等问题,提出一种新的基于PSO-SVM模型的液压系统故障诊断方法.该方法首先对采集的故障信号数据进行预处理,使用自适应噪声完备集合经验模态分解(Complete EEMD with Adaptive Noise,CEEMDAN)结合模糊熵的方法进...