A semi-smoothing augmented Lagrange multiplier algorithm for low-rank Toeplitz matrix completion

Abstract The smoothing augmented Lagrange multiplier (SALM) algorithm is a generalization of the augmented Lagrange multiplier algorithm for completing a Toeplitz matrix, which saves computational cost of the singular value decomposition (SVD) and approximates well the solution. However, the communication of numerous data is computationally demanding at each iteration step. In this paper, we propose an accelerated scheme to the SALM algorithm for the Toeplitz matrix completion (TMC), which will reduce the extra load coming from data communication under reasonable smoothing. It has resulted in a semi-smoothing augmented Lagrange multiplier (SSALM) algorithm. Meanwhile, we demonstrate the convergence theory of the new algorithm. Finally, numerical experiments show that the new algorithm is more effective/economic than the original algorithm

The Electrode Process of Y(Ⅲ)on Copper Electrode and Its Surface Metallizing

钇离子在铜电极上的电极过程及表面合金化周春根，段淑贞（北京科技大学理化系，北京１０００８３）通过熔盐电化学表面合金化方法获得的镀层非常均匀、无裂纹，具有很强的抗腐蚀性能，其原因是获得的合金镀层系由一种金属原子向另一种基体金属表面扩散的结果￣［１，２］...The reduction of yttrium ion on copper electrode in NaCl-KCl-YCl_3 molten saltshas been investigated.The results indicate that the formation of intermetallic compounds is occuredbefore the metallic yttrium to be formed.The formation of intermetallic compounds is controlled bythe process of which yttrium atoms are diffusing into copper electrode.The kinetic characters todiffusion of yttrium atoms were also discussed.作者联系地址：北京科技大学理化系，北京航空航天大学１０３教研室Author's Address: Department of Physical Chemistry,Univeraity of Science and Technology Beijing, Beijing 10008

An individual urinary proteome analysis in normal human beings to define the minimal sample number to represent the normal urinary proteome

<p>Abstract</p> <p>Background</p> <p>The urinary proteome has been widely used for biomarker discovery. A urinary proteome database from normal humans can provide a background for discovery proteomics and candidate proteins/peptides for targeted proteomics. Therefore, it is necessary to define the minimum number of individuals required for sampling to represent the normal urinary proteome.</p> <p>Methods</p> <p>In this study, inter-individual and inter-gender variations of urinary proteome were taken into consideration to achieve a representative database. An individual analysis was performed on overnight urine samples from 20 normal volunteers (10 males and 10 females) by 1DLC/MS/MS. To obtain a representative result of each sample, a replicate 1DLCMS/MS analysis was performed. The minimal sample number was estimated by statistical analysis.</p> <p>Results</p> <p>For qualitative analysis, less than 5% of new proteins/peptides were identified in a male/female normal group by adding a new sample when the sample number exceeded nine. In addition, in a normal group, the percentage of newly identified proteins/peptides was less than 5% upon adding a new sample when the sample number reached 10. Furthermore, a statistical analysis indicated that urinary proteomes from normal males and females showed different patterns. For quantitative analysis, the variation of protein abundance was defined by spectrum count and western blotting methods. And then the minimal sample number for quantitative proteomic analysis was identified.</p> <p>Conclusions</p> <p>For qualitative analysis, when considering the inter-individual and inter-gender variations, the minimum sample number is 10 and requires a balanced number of males and females in order to obtain a representative normal human urinary proteome. For quantitative analysis, the minimal sample number is much greater than that for qualitative analysis and depends on the experimental methods used for quantification.</p

Surface Modification of Molten Carbonate Fuel Cell Anode

选择铌作为合金化元素，通过氟化物熔盐电化学表面合金化的方法对熔融碳酸盐燃料电池阳极材料镍进行表面改性，改性后的阳极材料的耐蚀性能与电催化性能均得到明显的改善．In this study, the anode material of molten carbonate fuel cell was modified by the deposition of niobium on nickel surface. The results of polarization experiments reveal that the corrosion resistant properties as well as electrocatalytic activity have been improved greatly.作者联系地址：北京科技大学物理化学系Author's Address: Dept. of Phys. Chem., USTB, Beijiing 10008

Electrode Process of Lithium Ions on Aluminum Electrode in Molten LiCl-KCl

采用线性扫描伏安法和电位阶跃法，研究了锂离子在铝电极上的电极过程机理．结果表明锂离子在铝电极上沉积形成α固熔体时，电极过程受锂原子向铝电极中的扩散速度控制．当形成β锂铝合金时，存在成核极化现象，成核过程为瞬间成核过程，初期电极过程受形成β锂铝合金的速度控制，一定时间后受锂原子通过β锂铝合金层的扩散速度控制．β锂铝合金阳极有极限充电电压和极限电流．The Deposition mechanism of Lithium on aluminium electrode was studied by using linear sweep voltammetry and potential step method. The formation of α-solid solution was controlled by the diffusion of lithium within the aluminium substance. The formation of β-LiAl alloy was limited by the rate of forming the alloy at the legining, and by diffiusion of lithium through the β- LiAl alloy layer was limited by the rate of forming the alloy at the begining, and by the diffusion of lithium through the β-LiAl alloy later. Neucleation polarization for the formation of β-LiAl alloy was observed. This polarization is an instantaneaus process. There are a Limiting charging patential and a charging current for the LiAl alloy anode.作者联系地址：北京科技大学应用科学学院Author's Address: University of Science and Thchnclongy Beijing Beijing 10008