算子的最佳非负逼近和ω-非负逼近

本文中所沿用的概念和符号除特别说明外,其意义与[4,5]相同.本文主要给出了集P_δ(A)的结构以及正规算子A有唯一最佳ω-非负逼近的特征.     

从矩阵迹关系过渡到算子迹关系的一个通用方法(Ⅱ)

周其生等人（１９９７年）给出了一个把半正定Ｈｅｒｍｉｔｅ阵的迹关系推广到正迹类算子的相应关系的通用方法。本文把上述通用方法推广到Ｓｃｈａｔｔｅｎ类算子,并用它得到一些重要的算子迹不等式。     

Teleportation of Bipartite Entangled State Without Joint Measurement

In this paper, we present a probabilistic teleportation scheme for unknown bipartite entangled state. By using linear optical elements, we convert the Bell-state measurement into separated single-qubit measurements.     

Liquid‐Liquid Microextraction Coupled with High Performance Liquid Chromatography for Determination of Platinum

Liquid‐liquid microextraction (LLME) coupled with high performance liquid chromatography (HPLC) for the analysis of platinum is described. The analyte were extracted from 10.0 mL aqueous sample into organic phase. The extraction time was 20 min. Factors such as pH in aqueous phase, extraction times, and stirring rate were optimised. The method was applied for determination of platinum in mixture samples. The linearity range was from 1.0 to 100 nM and the detection limits was 0.1 nM. Relative standard deviations (%, n = 5) was 0.44 to 0.81. All experiments were carried out at room temperature, 35 ± 0.2°C.     

Liquid‐Liquid Microextraction Coupled with High Performance Liquid Chromatography for Determination of Palladium

Liquid‐liquid microextraction (LLME) coupled with high performance liquid chromatography (HPLC) for the analysis of palladium is described. The analytes were extracted from a 10.0 mL aqueous sample into organic phase. The extraction time was 20 min. Factors such as pH in aqueous phase, extraction times, and stirring rate were optimised. The method was applied for determination of palladium in mixture samples. The linearity range was from 1.0 to 100 nM and the detection limit was 0.12 nM. Relative standard deviations (%, n = 5) were 0.41 to 0.74. All experiments were carried out at room temperature, 35±0.2 °C.