亚铜离子氨浸法的发展前景展望

亚铜离子氨浸法作为大洋多金属结核处理方法之一，一直被认为是一个很有前途的冶金处理工艺，是催化化学还原技术在冶金生产中的具体应用，具有流程简单，能耗低，浸出选择性好，产品结构灵活，市场适应能力强，浸出试剂腐蚀性与毒性小，环境污染小等优点。     

3^n阶矩阵乘法的分块算法

针对３＾ｎ阶矩阵的乘法运行，给出了一种分块算法，其乘法运行量比常规的矩阵乘法计算方法和补零的基－２算法都有所减少。     

注水站微机数据采集与控制系统

用工控机组成了油田注水站数据采集系统．给出了系统的组成及测量方法，并讨论了系统的可靠性等问题．     

喷丸对连杆疲劳强度的影响

本文阐述了喷丸强化提高连杆表面质量和疲劳寿命。经喷丸处理,其试片弧高度迟到0.7mm时,疲劳极限提高了19%,达到440MPa,连杆实物疲劳强度试验结果表明,喷丸复盖率影响强化效果,文中还叙述了喷丸强化层应力分布的X射线应力测定工作。     

浸胶工艺对Nomex蜂窝性能的影响

本文研究了浸胶工艺对Ｎｏｍｅｘ蜂窝性能的影响，分析探讨了提高Ｎｏｍｅｘ蜂窝性能及外观质量的途径。研究结果表明：采取新的浸胶工艺制作的Ｎｏｍｅｘ蜂窝，各项性能全面达到法国宇航材料标准。     

GaAs FET辐射退化研究

低噪声ＧａＡｓ ＦＥＴ和功率ＧａＡｓ ＦＥＴ经中子辐射都未发生致命性的通或断失效，直流偏置伏态下，其失效模式仅仅表现为源漏饱和电流ＩＤＳＳ的退化降低，据此提出了ＩＤＳＳ退化失效与快中子注量φｎ之间的解析关键式ｌｎｙ＝ａ＋ｂｌｎφ。     

Efficient Skyline and Top-k Retrieval in Subspaces

Skyline and top-k queries are two popular operations for preference retrieval. In practice, applications that require these operations usually provide numerous candidate attributes, whereas, depending on their interests, users may issue queries regarding different subsets of the dimensions. The existing algorithms are inadequate for subspace skyline/top-k search because they have at least one of the following defects: 1) they require scanning the entire database at least once, 2) they are optimized for one subspace but incur significant overhead for other subspaces, or 3) they demand expensive maintenance cost or space consumption. In this paper, we propose a technique SUBSKY, which settles both types of queries by using purely relational technologies. The core of SUBSKY is a transformation that converts multidimensional data to one-dimensional (1D) values. These values are indexed by a simple B-tree, which allows us to answer subspace queries by accessing a fraction of the database. SUBSKY entails low maintenance overhead, which equals the cost of updating a traditional B-tree. Extensive experiments with real data confirm that our technique outperforms alternative solutions significantly in both efficiency and scalability.     

大力发展循环经济实现企业可持续发展

莱钢始建于1970年1月,现控股莱钢股份、鲁银投资两个上市公司及齐鲁证券等25个子公司。莱钢是中国冶金行业首批通过ISO9002质量管理体系、ISO14001环境管理体系和OHSAS18001职业安全健康管理体系国家认证的企业。2005年,莱钢被国家发改委确定为国家第一批循环经济试点单位。     

Selective Regional Correlation for Pattern Recognition

In this paper, a novel correlation-based pattern classifier that relies on the analysis of time-frequency decomposition of a template and signals is proposed. Significant improvements in resolution and accuracy are obtained using this new classifier when compared to a conventional correlation-based one. The short-time Fourier transform, continuous wavelet transform, and S-transform are considered in the time-frequency decomposition process. To evaluate the performance of the proposed scheme, numerical studies are performed on a set of synthetic test signals, and excellent results have been obtained. This paper also presents an illustrative example where two types of heart sounds are classified. The classification error percentage for the heart sounds using the new classifier is only 6.670% as compared to 56.67% when a general correlation-based classifier is used     

Real-time homogenous translucent material editing

This paper presents a novel method for real-time homogenous translucent material editing under fixed illumination. We consider the complete analytic BSSRDF model proposed by Jensen et al. [ [JMLH01] ], including both multiple scattering and single scattering. Our method allows the user to adjust the analytic parameters of BSSRDF and provides high-quality, real-time rendering feedback. Inspired by recently developed Precomputed Radiance Transfer (PRT) techniques, we approximate both the multiple scattering diffuse reflectance function and the single scattering exponential attenuation function in the analytic model using basis functions, so that re-computing the outgoing radiance at each vertex as parameters change reduces to simple dot products. In addition, using a non-uniform piecewise polynomial basis, we are able to achieve smaller approximation error than using bases adopted in previous PRT-based works, such as spherical harmonics and wavelets. Using hardware acceleration, we demonstrate that our system generates images comparable to [ [JMLH01] ]at real-time frame-rates.