ICFR: An effective incremental collaborative filtering based recommendation architecture for personalized websites

World Wide Web - To solve the problem that users’ retrieval intentions are seldom considered by personalized websites, we propose an improved incremental collaborative filtering (CF)-based...     

PWR堆芯燃料组件非线性梁模型研究

为描述燃料组件的非线性特性，采用有限元方法建立燃料组件横向梁模型，并引入迟滞模型，用于模拟燃料组件横向变形时的非线性效应。计算结果表明:该非线性梁模型能够更准确地获得组件的弯曲变形和受力，有助于开展燃料组件事故分析。      

Low-complexity transmit antenna selection algorithm formassive MIMO

Massive multiple input multiple output (MIMO) systems can increase capacity and reliability greatly. However,extremely high hardware costs and computational complexity lead to the demand for reasonable antenna selection.Aiming at the problem that the traditional antenna selection algorithm based on maximizing sum capacity has largecomplexity and worse bit error rate (BER) performance, a two-step selection algorithm is proposed, which selectsa part of the antennas based on the norm-based antenna selection (NBS) firstly, and then selects the antenna basedon maximizing capacity via convex optimization. The simulation results show that the improved algorithm has betterBER performance than the traditional algorithms. At the same time, it reduces computational complexity greatly.     

四明山煤矿9102综采工作面沿空留巷技术研究

为研究薄煤层综采工作面沿空留巷技术，以四明山煤矿9102综采工作面为工程背景，对工作面及留巷段进行支护设计并进行了效果检验。结果表明：通过使用110工法进行沿空留巷能够减小采空区顶板压力，通过锚索应力计监测发现，煤壁后10 m位置处锚索应力最大，为220 MPa，推过后锚索受力急剧下降，并在其后30 m处达到80 MPa并保持稳定；同时发现距煤壁220 m后的巷道顶板变形量基本保持不变，最大下沉量为265 mm；距煤壁100 m位置两帮最大移近量最大为330 mm。使用该工艺后能够满足生产要求.     

Dissimilar Metal Joining of 304 Stainless Steel to SMA490BW Steel Using the Filler Metal Powders with a High-Entropy Design

Metals and Materials International - High-entropy alloys having excellent properties are particularly suitable for the application as the filler metals in welding. In the present study,...