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The objective of test case prioritization is to improve failure detection rates by executing more important test cases earlier. Due to its simplicity and effectiveness, the greedy algorithm based on code coverage is widely utilized. However, when adopting the coverage information, the current technology only considers the number of code units covered by test cases, regardless of the importance of the code units. This paper employs the approach as the coverage granularity to construct a method weight definition model (MWDM), which extends the traditional coverage algorithm model and proposes an improved greedy algorithm based on MWDM (MWDM-IGA), in order to address the aforementioned issue. At the same time, to utilize the project change history, a file-level defect prediction model is introduced into the above algorithm. Experimental validation on the real-error dataset----Defects4j demonstrates that MWDM-IGA outperforms other algorithms based on overlay information in terms of average failure detection rate (APFD) and the introduction of defect prediction into TCP will further improve the performance of the algorithm. During prioritization, the occurrence of 'ties' caused by multiple test cases covering the same number of code units decreases, thereby significantly enhancing the efficiency of the algorithm. [ABSTRACT FROM AUTHOR]

Organic onium salt has been used as a photosensitive pigment for rare-earth luminescent fibre. A certain dose of organic onium salt has been added to rare-earth strontium aluminate luminescent fibre (RESALF) during its melt spinning. It’s photochromatic property is studied by comparing RESALFs with and without the organic onium salt. RESALF photochromatic identification method is devised according to the Standard Colorimetric System CIE (International Commission on illumination) 1931 XYZ. The results show that, when excited by 365nm wavelength light, RESALF doped with organic onium salt exhibits good photochromatic properties. The luminescence color of RESALF doped with organic onium salt switches from the yellow-green region to the blue region. The light-chromatic recognition method used is thus able to provide an accurate identification of the luminescence color of the new RESALF. [ABSTRACT FROM AUTHOR]

Y 2 O 3 : 5%Eu 3+ , x %Li + phosphor thin film was fabricated via an electro-deposited method. The dependence of the morphology and luminescent properties for Y 2 O 3 : 5%Eu 3+ , x %Li + thin film on Li content, deposition time and solution concentration were studied. The results indicate that the morphology and the emission intensity strongly depend on the Li content, deposition time, and solution concentration. It is found that the Li addition is beneficial to the formation of flower morphology and then enhances the photoluminescence intensity. The optimal Li content is 15% for Y 2 O 3 : 5%Eu 3+ , x %Li + . [ABSTRACT FROM AUTHOR]

PET/germanium composite fibers that with negative air ion release and far infrared emission properties were prepared by adding germanium particles to polyethylene terephthalate (PET) and melt-spinning. The morphology, effect of the germanium content on the negative air ion release, far infrared emission, thermal and mechanical properties of the fibers were investigated. The germanium particles uniformly disperse in the PET fibers when the concentration ranged from 1% to 3 percent. The value of the negative air ions released by the PET/germanium composite fibers increased with increasing content of germanium and reached 1470 ions/cm-3 at 3% germanium concentration. The highest far infrared normal emissivity (0.9) was obtained at 3% germanium concentration. The TG and DSC analysis revealed that the two heat histories used had little effect on the PET. The crystallinity of the composite fibers decreased with increasing germanium content. Water fastness testing showed that the PET/germanium composite fibers had excellent and durable negative air ion release and far infrared emission properties. The breaking strength of the fibers decreased with increasing of the germanium content. [ABSTRACT FROM AUTHOR]

Coloured PA6 luminous fibres were prepared by adding luminous material and inorganic pigments. The morphology and optical properties of the coloured PA6 luminous fibres were characterized. The results revealed that luminous materials were dispersed uniformly in the fibres without obvious agglomerates. The yellow inorganic pigment and luminous material might induce a reduction in the PA 6 fibre crystallization degree. The luminous fibres emitted long-lasting phosphorescence with an excitation peak at 360 nm and emission peak at 515 nm. However, the excitation spectrum of the PA6-Y exhibited three peaks. The decay curves revealed that the yellow inorganic pigment enhanced the brightness of PA6 luminous fibres. The PA 6 luminous fibres had low colour purities and a high colour rendering index. There was no obvious difference among the emissive colours of the luminous fibres, and the colours of luminous fibres were similar to those of the pigments added. [ABSTRACT FROM AUTHOR]

Wireless Mesh network (WMN) is multi-hop heterogeneous network, which breaks shortcomings of traditional wireless network. WMN comes into sight with more advantages. To the multi-radio multi-channel (MRMC) wireless mesh networks (MRMCWMN), routing distribution, channel assignment and rate allocation can be united to optimize network performance. MRMC resource optimization method based on convex theory for WMN is presented in this paper. According to convex theory, we use the convex optimization function to get the optimal solution in the limited network supporting by Ad hoc On-Demand Distance Vector (AODV) routing method. At the same time, we resolve the optimal solution into three simple sub-problems according to the Lagrange duality method supporting by multi-radio multi-channel AODV (MAODV). We use MATLAB simulation tools to simulate the new and improved optimization method. The experimental results show that our method has better network performance in the applications of WMN. [ABSTRACT FROM AUTHOR]

Electrodeposition process was studied in order to obtain uniformly thick magnetic films which could be incorporated in magnetic microsensors and actuators. Ni and NiFe patterns of different dimensions were deposited by micromolding on a Cu/Ti seed layer sputtered on SiO2/Si (for NiFe) and glass (for Ni). In the case of NiFe deposit, a linear deposition rate was calculated by measuring the deposit thickness using mechanical profilometry. The optimum pattern composition for the fabrication of magnetic microdevices was 80 at.% of Ni, that was found by comparing the magnetic properties of the deposits obtained from different conditions. The deposits structure was also characterized. All the parameters were studied as a function of the current density so that by controlling the electrodeposition conditions the characteristics of the deposits could be controlled. NiFe films were integrated in multilayered magneto-impedance sensors. They present good adherence of the layers even after performing annealing at both 300°C and 500°C and sensor sensitivity reaches 1%/Oe. [ABSTRACT FROM AUTHOR]

The introduction of antigen into animals causes antigen-specific T cells to divide and then die. Activated T cell death requires either of the death effector molecules, Bak or Bax. When T cells die, Bak and Bax change their conformations, a phenomenon that is thought to be required for Bak or Bax to drive cell death. Here we show that Bak changes conformation before activated T cells die, as detected by an antibody specific for a peptide near the NH2 terminus of Bak,W but Bax does not change its shape markedly until after the cells are dead, as detected by an antibody specific for a peptide near the NH2 terminus of Bax. This latter finding is also true in activated T cells that lack Bak and are therefore dependent on Bax to die. This result suggests that Bax does not have to adopt its final, completely unfolded form until after the cells are dead. [ABSTRACT FROM AUTHOR]