合理选择锻造工艺降低锻件制造成本

150 MN水压机柱塞锻件重70.67 t。在保证钢锭质量的前提下,选取93 t钢锭(钢锭利用率75.9%),通过KD锻造方法的压实作用,成功地生产出合格的柱塞锻件。     

大开口高承载网格加筋壳的设计与工艺

本文采用有限元法计算了承受高轴压和外压作用下的大开口复合材料纵横密加筋壳的稳定性，得出不同铺层角度、不同受力工况下的大开口圆柱壳的临界载荷，并采用1：1试验件进行试验验证，将计算值与实验值进行了比较；对大开口复合材料纵横密加筋壳的缠绕工艺进行了研究，解决了大开口网格加筋壳开口补强的一次成型技术和密筋及开口部分的多丝嘴、无增量、非线性机械化缠绕成型工艺技术。     

Subspace Methods with Local Refinements for Eigenvalue Computation Using Low-Rank Tensor-Train Format

Computing a few eigenpairs from large-scale symmetric eigenvalue problems is far beyond the tractability of classic eigensolvers when the storage of the eigenvectors in the classical way is impossible. We consider a tractable case in which both the coefficient matrix and its eigenvectors can be represented in the low-rank tensor train formats. We propose a subspace optimization method combined with some suitable truncation steps to the given low-rank Tensor Train formats. Its performance can be further improved if the alternating minimization method is used to refine the intermediate solutions locally. Preliminary numerical experiments show that our algorithm is competitive to the state-of-the-art methods on problems arising from the discretization of the stationary Schrödinger equation.     

PC-based微控器构建的新型计算机测控网络

由PC－based可编程微型控制器构成新型的计算机测控网络，具有各站点可在PC机上编程，可脱机独立运行的特点，文章论述如何构建PC－based计算机测控网络，及其实现方法与编程技术，并给出一个已成功应用于实际的基于RS－485总线和PC－based多站点测控网络方案。     

氰酸酯复合材料缠绕成型工艺的研究

以液态双酚A型氰酸酯(CE)为树脂基体,碳纤维T-700为增强纤维,缠绕制备了氰酸酯基复合材料(CF/CE)。结果表明:抽真空处理可以有效控制CF/CE的含胶量并降低孔隙率,CF/CE的Tg为241.9℃,孔隙率为1.22%时剪切强度可达101.98MPa。     

Enhanced Anticorrosion and Antifouling Properties of Lubricant-Infused Pyramidal Polydimethylsiloxane Coating

Although slippery liquid-infused porous surfaces (SLIPSs) have been extensively studied for anticorrosion and antifouling applications, their durability and stability restrict their practicality. Herein, a technique is presented for fabricating SLIPS with dual-protection. First, a polydimethylsiloxane (PDMS) coating with a pyramidal morphology is fabricated through mold-based lithographic techniques. The mold is prepared by applying a texturing process to a monocrystalline silicon wafer of the type used to produce solar cells. Once infused with lubricant, the SLIPS is prepared and has a water-contact angle of 112°, on an inclined surface, water droplets slide easily off its surface. Due to the excellent chemical stability and low superficiality of the lubricant layer, the SLIPS offers excellent antifouling and anticorrosion properties. In a static marine environment, the SLIPS has an extremely low coverage fraction of algae. After being immersed in a 3.5% NaCl solution for 400 days, |Z|_0.01 Hz ≈ 10¹¹ Ω, and the phase angle at high frequency is approximately −90°. SLIPSs based on the PDMS coating provide dual protection (anticorrosion and antifouling), showing that this design approach produces SLIPSs with excellent potential for applications in marine environments.     

毛坯调质工艺在加氢反应器锻件生产中的应用

主要介绍了毛坯调质热处理工艺在 Cr-Mo钢材料加氢反应器锻件生产中的应用。检测结果表明 :经毛坯调质热处理的锻件 ,其各种性能指标均合格、稳定 ,调质热处理可有效缩短锻件的生产周期、降低锻件的实际生产成本     

基于SOM-RBF神经网络的COD软测量方法

污水处理是一个复杂的非线性过程,化学需氧量（chemical oxygen demand,COD）是评价污水处理效果的关键指标之一。COD的传统测量方法耗时长、成本高,基于传统神经网络的软测量方法提高了COD参数的测量速度但精度较差。针对这些问题,设计一种结合自组织特征映射 (self-organizing map, SOM)和径向基函数(radial basis function, RBF)神经网络的COD参数软测量方法。该方法利用SOM网络聚类数据样本,根据所得聚类结果确定RBF网络的隐层节点数及节点的数据中心,综合提高RBF网络的收敛速度和拟合精度。利用污水处理厂部分水样数据建立COD软测量模型,模型仿真和硬件在线测试结果表明,相对于传统的BP、RBF等网络,基于SOM-RBF神经网络的COD软测量方法测量时间短、预测精度较高,具有较为广阔的应用前景。     

扁挤压筒应力的光弹性与有限元分析

针对扁挤压筒内应力的解析法求解非常困难，且很难有精确理论解的特点，用光弹性实验方法确定挤压力的作用方式，以此作为有限元计算的边界条件，对扁挤压筒内部应力场进行分析计算。结果表明，实验分析与数值模拟结果吻合较好。采用光弹性和有限元相结合的分析方法，提高了计算的精度，也为挤压模具的优化设计提供了新的途径。     

基于优化理论的藻类生长模型及在水华预测中的应用

在对水华产生机理分析和研究的基础上,建立了用于藻类生长模型,研究了有约束条件的非线性极小值问题求取最优参数估计值的方法。结合实验数据对模型中涉及的参数,运用多参数同时估计法进行估计并验证。仿真与实验结果表明了该模型能够较好地描述水华从产生到爆发过程的变化规律,为水华的预警及治理提供参考依据。