新形势下增强高职院校思政课教学效果的着力点

高职院校生源质量下降,课堂教学师生恶性互动现象突出。切实增强高职院校思政课教学效果,对于教师而言,更新教学理念是前提,设计好教学内容是重点,创新教学方法和手段是关键。     

承钢1780线精轧机的减速机螺栓断裂分析

介绍了对承钢1780生产线F1精轧机减速机输入轴固定螺栓和F3精轧机减速机地脚螺栓断裂的断口形貌.对其最大承受力和直径进行了计算,对其微观组织进行了分析,找到了这两起螺栓断裂失效的原因,给出了相应的解决措施.     

A numerical‐indicator‐based method for design of distributed wastewater treatment systems with multiple contaminants

In the design of distributed wastewater treatment systems with multiple contaminants, it is very important to minimize unnecessary stream mixing to reduce total treatment flow rate as much as possible. A new numerical indicator, total mixing influence potential (TMIP), to reflect the influence of the stream mixing caused by performing a process on the total treatment flow rate of a distributed wastewater system is introduced. In design procedure, the TMIP value is calculated based on pinch principle. The process with the smallest TMIP value will be performed first. The results of a few literature examples show that designs with very low (even minimum) total treatment flow rates can be obtained with the method proposed. In addition, the method proposed is simple and of clear engineering insight. The calculation effort does not increase significantly when the number of streams, contaminants, and/or treatment units increases. © 2015 American Institute of Chemical Engineers AIChE J, 61: 3223–3231, 2015     

Adaptive noise cancellation based on EMD in water-supply pipeline leak detection

In water-supply pipeline leak detection and location, both the leak signals and blurred noises are closely related to the pipeline states and surroundings and most of the conventional noise-cancellation methods have to depend on the empirical parameters of either signals or noises. EMD (Empirical Mode Decomposition) is an adaptive signal decomposition method and is exclusive of base functions. A signal is decomposed into several IMFs (Intrinsic Mode Functions) in EMD, then the noise in a signal can be cancelled through removing uncorrelated IMFs. The existing EMD noise cancellation methods need to know the characteristics of either the wanted signal or the noise for rebuilding the noise-removed signal. However the characteristics of leak signals and noises are not fixed in various pipeline conditions, so the existing EMD noise cancellation methods can’t be directly applied in water-supply pipeline leak detection. This paper proposes an adaptive noise cancellation method based on EMD, in which the IMFs that don’t or less contain the components related to the leak can be removed through the cross-correlation between the IMFs and another signal collected at the either side of a suspect leak. In simulation analysis, the adaptive noise cancellation method can increase the SNRs (Signal to Noise Ratios) of leak signals as high as 16 dB. In processing practical pipeline vibro-acoustic signals, with the proposed method the peak of adaptive time delay estimate of leak signals, which determines the location of a leakage, becomes more distinguished, and thus the error of leakage location is improved.     

胀断连杆用非调质钢C70S6BY产品研发

C70S6BY非调质热轧圆钢经过80 t顶底复吹转炉-LF+VD精炼-240 mm×240 mm方坯连铸-Φ60 mm圆钢连轧-缓冷-精整、探伤工艺生产。采用碱度4~8 Al₂O₃-CaO-SiO₂渣系,LF精炼45~60 min;LF离站［S］≤0.010%,［O］ ≤0.001%;VD后硫合金化,［S］控制在0.063%～0.065%。VD出钢前喂入含镁包芯线100~150 m,Mg收得率在11%~17%,镁硫含量比值约为1.56%。中间包钢水过热度15~30 ℃,铸坯拉速0.9 m/min。经正火后,试验钢抗拉强度和屈服强度达957 MPa和563 MPa;伸长率和断面收缩率达12%和21%。镁改质处理后,硫化物夹杂长宽比1~2占比达到55%以上。     

旋风分离器内气相旋转流不稳定性的实验研究

旋风分离器内气相旋转流具有较强的不稳定性,其表现形式是旋转流的旋转中心围绕几何中心的偏心摆动,导致流场的瞬时速度随时间发生脉动变化。这种旋流的不稳定特性难以用时均流场参数进行描述,需要用动态流场参数描述,为此采用热线风速仪测量了?300 mm旋风分离器内瞬时切向速度随时间的变化。实验结果表明瞬时切向速度是由气体湍流形成的高频脉动和旋转流偏心摆动形成的低频脉动两部分叠加构成,据此探讨了旋转流摆动形成的机制。瞬时切向速度的低频脉动来源于刚性涡的偏心摆动,脉动幅值与偏心距成正比。通过瞬时切向速度频域建立了旋转流的摆动频率与入口速度、筒体直径和排气管直径的计算模型。     

混凝沉淀法处理萤石浮选废水工程

研制了一种萤石浮选废水高效混凝剂并投入应用。从萤石浮选废水处理的一个成功实例，分析、总结了混凝沉淀法处理萤石浮选废水的可行性。该法实现了萤石浮选废水的100％回用，做到了废水的零排放，保护了周围环境，同时还节约了水资源。     

承钢钒钛矿“100％外配焦粉烧结”工艺的应用研究

承钢烧结厂采用“100％外配焦粉烧结”，提高了钒钛矿强度和烧结机生产率，降低了固体燃耗。     

树立“以人为本”的理念完善图书馆服务体系

知识经济是以人的知识为基础，以人的智力为资源的经济，“以人为本”是现代图书馆管理的核心，“尊重人才、重视人才、鼓励创新”成为现代图书馆管理的基本理念。树立“以人为本”的理念是社会主义精神文明建设的需要，是新形式下图书馆的服务宗旨，图书馆要实现“以人为本”的管理体制，努力完善各项服务。     

高校消防安全现状及火灾预防对策

近年来,我国的高等教育事业迅速发展,由于高校的法制教育、消防安全教育以及消防基础设施未能同步发展,高校火灾事故屡有发生,损失惨重.针对当前各高校在消防方面普遍存在的问题和隐患进行了剖析.同时针对高校的特点,就如何在高校加强和改进消防工作,提出了具体的防范措施与对策.