Fisher discrimination based low rank matrix recovery for face recognition

In this paper, we consider the issue of computing low rank (LR) recovery of matrices with sparse errors. Based on the success of low rank matrix recovery in statistical learning, computer vision and signal processing, a novel low rank matrix recovery algorithm with Fisher discrimination regularization (FDLR) is proposed. Standard low rank matrix recovery algorithm decomposes the original matrix into a set of representative basis with a corresponding sparse error for modeling the raw data. Motivated by the Fisher criterion, the proposed FDLR executes low rank matrix recovery in a supervised manner, i.e., taking the with-class scatter and between-class scatter into account when the whole label information are available. The paper shows that the formulated model can be solved by the augmented Lagrange multipliers and provides additional discriminating power over the standard low rank recovery models. The representative bases learned by the proposed method are encouraged to be closer within the same class, and as far as possible between different classes. Meanwhile, the sparse error recovered by FDLR is not discarded as usual, but treated as a feedback in the following classification tasks. Numerical simulations demonstrate that the proposed algorithm achieves the state of the art results.     

Subcarrier allocation in multi-hop orthogonal frequency division multiple access wireless networks

Orthogonal frequency division multiplexing (OFDM) has been widely considered as a key technique for next generation mobile communication systems. Meanwhile, relaying technologies can improve users’ quality of service, increase network capacity and enlarge cellular coverage at a low cost. In this paper, we focus on subcarrier allocation and utilization in multi-hop OFDM access (OFDMA) wireless networks, and propose two efficient subcarrier allocation schemes aiming to increase network throughput and subcarrier utilization. The first scheme selects suitable links for data transmission from base stations to terminals at the beginning. Then, interference-free links are included into the same group for network resource reuse. For the purpose of global optimization, we propose a Tabu-based searching algorithm as the second subcarrier allocation scheme. Simulation results demonstrate that our proposed algorithms outperform other schemes in both network throughput and subcarrier utilization.     

Transport property measurements in sheared granular flows

Experiments were performed in a shear cell device under four different solid fractions. The glass spheres with a mean diameter of 3 mm were used as granular materials. The motions of the granular materials were recorded by a high-speed camera. By using image processing technology and a particle tracking method, the average and fluctuation velocities in the streamwise and the transverse directions could be successfully measured and analyzed. Three bi-directional stress gages were used to measure the normal and shear stresses along the upper boundary. The effective viscosity of the granular material flow can be calculated. By tracking the movements of particles continually, the curves of the mean-square diffusive displacements versus time were plotted and were used to determine the self-diffusion coefficients from the slopes of the curves. The fluctuations and the self-diffusion coefficients in the streamwise direction were much higher than those in the transverse direction. The fluctuations were found to increase with the solid fraction, but the diffusion coefficients were greater in a more dilute flow system.     

3600煤气发生炉系统优化设计

分析了传统 36 0 0造气工艺流程存在的缺点 ,针对邯钢集团化肥公司的实际情况并配合 12 2 0工程的顺利实施 ,决定采用设备紧凑、发气量大、工艺设备较先进的 36 0 0煤气发生炉系统。在该系统的设计中 ,除了采用新型高效旋风除尘器和联合热管锅炉回收器外 ,还充分吸收了近年来我国造气技术涌现出来的先进技术装备     

离子自拆分法合成D-(一)-对羟基苯甘氨酸

研究了用离子自拆分方法拆分外消旋对羟基苯甘氨酸(DL-HPG)而合成D-(—)-对羟基苯甘氨酸(D-HPG)。采用正交试验确定了最佳反应条件:在丙酮和水的混合溶剂中,等物质的量的DL-HPG和硫酸在60℃下加入D-HPG,搅拌反应15min左右,降温过滤得到D-HPG的硫酸盐,水解即可得到D-HPG(光学纯度99％),一次性总收率达到20％。适于工业生产。     

露天开采下盘无台阶采矿法

新桥硫矿首次在国内推行露天开采下盘无台阶采矿新工艺,该工艺具有剥岩少、基建快、出矿早、采矿工程延深快等特点。由于该工艺具有独特的靠帮方式和端部过渡方式,需严格控制底盘因爆破而导致的岩体滑动。该工艺的实施已取得了显著的经济效益。     

Sparse Localized Decomposition of Deformation Gradients

Sparse localized decomposition is a useful technique to extract meaningful deformation components out of a training set of mesh data. However, existing methods cannot capture large rotational motion in the given mesh dataset. In this paper we present a new decomposition technique based on deformation gradients. Given a mesh dataset, the deformation gradient field is extracted, and decomposed into two groups: rotation field and stretching field, through polar decomposition. These two groups of deformation information are further processed through the sparse localized decomposition into the desired components. These sparse localized components can be linearly combined to form a meaningful deformation gradient field, and can be used to reconstruct the mesh through a least squares optimization step. Our experiments show that the proposed method addresses the rotation problem associated with traditional deformation decomposition techniques, making it suitable to handle not only stretched deformations, but also articulated motions that involve large rotations.     

UHMWPE瓷机滤板的研制

通过对超高分子量聚乙烯(UHMWPE)特性的分析，指出用其制作瓷机滤板的可能性，并针对UHMWPE的成型加工性能及瓷机滤板的结构特点，确定了压制、烧结成型的工艺方案，阐述了瓷机滤板压制、烧结成型工艺务件，压缩模具结构，模具工作过程，以及成型过程中使用的加热与冷却装置及加热与冷却油路设计，介绍了压制、烧结成型工艺要点和UHMWPE瓷机滤板的应用情况。     

酸化水解-活性污泥-生物接触氧化工艺处理有机污水

介绍了采用酸化水解——活性污泥——生物接触氧化工艺处理含有山梨醇、甘露醇、蔗糖、醋酸乙烯、甲基纤维素的有机污水。该工艺具有出水水质稳定，操作简单、管理方便，能耗低等优点，是处理该类有机污水的有效方法。