水工隧洞土洞段稳定性分析及支护效果研究

水工隧洞围岩的应力分布及变形特征对保证其长期稳定性具有关键的作用。该文以中部引黄施工支洞为例进行实态建模,通过利用有限差分程序FLAC3D进行分析计算。研究结果表明,未加强支护前,锁脚锚杆所受的压应力已超过锚杆的抗压强度,拱脚处应力集中现象明显;变形主要集中在拱顶、底板部位;加强支护后,钢拱架变形、钢拱架轴力和锚杆最大拉应力都得到减小。支护效果稳定且能够满足施工及后期运行要求。     

高冰镍硫酸浸出液萃取净化工艺流程的经济分析和最优化

本文以我国水法冶金的实际应用课题为对象,用系统分析的手法对高冰镍硫酸浸出液以5709和P507为萃取剂的两种萃取净化流程作了技术经济分析和比较.本文基于工艺实验建立的萃取与反萃模型,作为过程模拟和设计的基础.最后确定出该流程的最优操作参数和各单元操作的费用估算.     

Spatio‐temporal geometry fusion for multiple hybrid cameras using moving least squares surfaces

Multi‐view reconstruction aims at computing the geometry of a scene observed by a set of cameras. Accurate 3D reconstruction of dynamic scenes is a key component for a large variety of applications, ranging from special effects to telepresence and medical imaging. In this paper we propose a method based on Moving Least Squares surfaces which robustly and efficiently reconstructs dynamic scenes captured by a calibrated set of hybrid color+depth cameras. Our reconstruction provides spatio‐temporal consistency and seamlessly fuses color and geometric information. We illustrate our approach on a variety of real sequences and demonstrate that it favorably compares to state‐of‐the‐art methods.     

我国立德粉生产需求现状及发展趋势

叙述了我国立德粉生产、消费、出口及市场现状,指出了立德粉行业的发展趋势。     

A New Derivation of the Cubature Kalman Filters

This paper investigates the cubature Kalman filtering (CKF) for nonlinear dynamic systems. This third‐degree rule based filter employs a spherical‐radial cubature rule to numerically compute the integrals encountered in nonlinear filtering problems, thereby removing the requirements of explicitly computing the Jacobians. The cubature rule, however, requires computing the intractable integrals over a high‐dimensional spherical region for multidimensional applications. Moreover, the cubature formula that has been used to construct the spherical cubature formula has some demerits, most notably its inconvenient properties in computation and low estimation accuracy. Aimed at these issues, a general class of CKFs that uses only cubature rules is derived in this paper. It can be shown that the conventional CKF is a special case of the proposed algorithm. The paper also includes higher‐degree CKFs, especially two representative types of the fifth‐degree CKFs. Performance of the proposed algorithms is demonstrated via two target tracking problems. The experimental results, presented herein, illustrate the superior performance of higher‐degree CKFs to conventional nonlinear filters.     

新型无机抗菌剂碱式次氯酸镁的研制与应用

本文研究了国内尚属空白的碱式次氯酸镁（BMH）的制备方法，并对BMH的理化性质和杀菌效果进行了初步研究。     

Preparation and properties of polyamines. Part I. Polymers containing dinitro substituted aromatic groups

Relatively high molecular weight polyamines with aromatic nitro groups in the repeat units were prepared by the reactions of aliphatic diamines, and 1,5-difluoro-2,4-dinitrobenzene, at elevated temperatures in diphenyl sulfone. The physical characteristics, including solubility, thermal stability, and viscosity of the resulting polyamines were found to be strongly dependent on the aliphatic chain length of the diamines used. All polymers exhibited exceptional solvent resistance. Except for strong acids with bulky counter-ions, including sulfuric, perchloric, and nitric acids, the polymers were found to be insoluble in all common organic solvents at room temperature.     

透明型光学用胶粘剂的新进展

1加拿大树胶和甲醇胶。该胶在可见光区透光率93％，折光率1．52～1．54，使用方便。但其缺点是粘接强度低、耐温性能差，二战后，其用量已明显减少。二战期间得到大量应用的光学胶是甲醇胶，其粘接强度有所提高，耐寒性较好，缺点是弹性差、收缩率大。可通过改性使其性能有所好转。2＃佛控类胶。这类胶是在含双键的不饱和烯烃类单体中加入引发剂制得，通常收缩率较大。在这类胶中加入一定量的聚苯乙烯可改善其收缩性；用甲基丙烯酸甲酯作改性剂还可使耐热性和粘接力得到提高。3有机硅类胶粘剂。特点是无色透明、耐温性好、耐水、耐油；但通…     

明代早期祭红釉显微结构与工艺的研究

收集了明代早期 (永乐、宣德、成化 )不同年代的祭红釉瓷残片。用扫描电镜、透射电镜、能谱仪、电子衍射、荧光X射线光谱分析、光学显微镜等系统地研究了它们的显微结构 ,用体视显微镜、分光光度计等观察、测定了它们的呈色状况 ,详细探讨了明代祭红釉之间的差别 ,分析了它们的生产工艺与化学组成、显微结构之间的关系。     

RLE图像压缩算法优化研究与应用

该文对比了传统的RLE（游程编码）算法,通过对RLE压缩编码的分析,得出RLE压缩算法存在很大的优化空间,并实现了优化后的RLE图像压缩算法,且着重介绍了这种算法的优缺点和优化方向。