Comprehensive Benefit Evaluation and Regional Difference Research of State-owned Mixed-ownership Enterprises

Scientific and accurate assessment of the comprehensive benefits and regional differences of state-owned mixed-owned enterprises is an important link in promoting the steady progress of mixed-ownership reform of state-owned enterprises and achieving high-quality development of the state-owned economy. Using factor analysis method and GA-BP neural network model to evaluate the comprehensive benefits of listed state-owned mixed enterprises, the results show that, first, the main factors affecting the comprehensive benefits of state-owned mixed enterprises are profitability factor, sustainability factor and solvency factor, and the effect is as follows: profitability factor\u3esustainability factor\u3esolvency factor; second, factor analysis effectively improves the evaluation performance of the GA-BP neural network model. Further analysis of regional differences, it is found that the average comprehensive benefit of regional state-owned mixed enterprises is: eastern region \u3e central region \u3e western region. Among them, the profitability factor and solvency factor are as follows: eastern region\u3ecentral region\u3ewestern region, and the size of sustainability factor is: eastern region\u3ewestern region\u3ecentral region. Therefore, we can start from deepening the classification reform of state-owned enterprises, increasing investment in innovation, reducing financial leverage, and improving regional linkages, so as to improve the profitability, solvency and sustainability of enterprises, narrow regional differences, and achieve coordinated development between regions

A new impedance matching method for an ultra-wide band and dual circularly polarised feed

In traditional antenna design, metal components are not placed in the central part of the antenna as they change the characteristics of near field radiation. However, we show that placing a metal ring in the centre of the strip lines, which connect the ends of folded high-frequency dipoles, does not damage the performance of the feed. Instead it significantly improves the voltage standing wave ratio of the feed whilst other performance indicators are not compromised. Thus, our findings show an excellent way of improving the wide band feed. Based on this foundation, a new circularly polarised feed for operation between 0.4 to 2 GHz is introduced for the Chinese Spectral Radioheliograph in this paper. The issue of a feed impedance matching network is investigated. By optimising the impedance matching, the performance of the feed is enhanced with respect to the previous realisations of the Eleven feed. The simulation and experimental results show that the gain of the feed is about 10 dBi, and the VSWR is less than 2:1. In addition, the feed has a low axial ratio, fixed phase centre location, and constant beam width in the range of 0.4 to 2 GHz

Study of muon tomographic imaging for high Z material detection with a Micromegas-based tracking system

A high spatial resolution tracking system was setup with the Micro-mesh gaseous structure (Micromegas) detectors in order to study the muon tomographic imaging technique for nuclear threat detection. 6 layers of 90 mm $\times$ 90 mm one-dimensional readout Micromegas were used to construct a tracking system and the imaging test using some metallic bars was performed with cosmic ray muons. A two-dimensional imaging of the test object was presented with a newly proposed ratio algorithm

Experimental observation of conditional past-future correlations

Conditional past-future correlations measure the lack of statistical independence between past and future system measurement outcomes when conditioned to a given state at a present time. Quantum non-Markovian memory effects are present whenever this correlation is not null. Conditional past-future correlations can also be used to detect initial system-environment correlated states. In this work, we provide theoretical and experimental evidence for these general properties. We build an optical setup that implements the dynamics of a qubit interacting with a dephasing spin bath. Both finite and infinite bath-size limits are observed. Confirmation of theoretical predictions for conditional past-future correlations is obtained. This work provides experimental support for quantum memory indicators based solely on outcomes of explicit system measurement processes.Fil: Yu, Shang. University of Science and Technology of China; ChinaFil: Budini, Adrian Adolfo. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro | Universidad Nacional de Cuyo. Instituto Balseiro. Archivo Histórico del Centro Atómico Bariloche e Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnol.conicet - Patagonia Norte. Unidad de Adm.territorial; Argentina. Universidad Tecnológica Nacional; ArgentinaFil: Wang, Yi Tao. University of Science and Technology of China; ChinaFil: Ke, Zhi Jin. University of Science and Technology of China; ChinaFil: Meng, Yu. University of Science and Technology of China; ChinaFil: Liu, Wei. University of Science and Technology of China; ChinaFil: Li, Zhi Peng. University of Science and Technology of China; ChinaFil: Li, Qiang. University of Science and Technology of China; ChinaFil: Liu, Zheng Hao. University of Science and Technology of China; ChinaFil: Xu, Jin Shi. University of Science and Technology of China; ChinaFil: Tang, Jian Shun. University of Science and Technology of China; ChinaFil: Li, Chuan-Feng. University of Science and Technology of China; ChinaFil: Guo, Guang Can. University of Science and Technology of China; Chin

FBXW8-Dependent Degradation of MRFAP1 in Anaphase Controls Mitotic Cell Death

Mof4 family associated protein 1 (MRFAP1) is a 14 kDa nuclear protein, which involves in maintaining normal histone modification levels by negatively regulating recruitment of the NuA4 (nucleosome acetyltransferase of H4) histone acetyltransferase complex to chromatin. MRFAP1 has been identified as one of the most up-regulated proteins after NEDD8 (neural precursor cell expressed developmentally down-regulated 8) inhibition in multiple human cell lines. However, the biological function of MRFAP1 and the E3 ligase that targets MRFAP1 for destruction remain mysterious. Here we show, by using an immunoprecipitation-based proteomics screen, that MRFAP1 is an interactor of the F-box protein FBXW8. MRFAP1 is degraded by means of the ubiquitin ligase Cul7/FBXW8 during mitotic anaphase-telophase transition and accumulated in mitotic metaphase. Overexpression of FBXW8 increased the polyubiquitination and decreased the stability of MRFAP1, whereas knockdown of FBXW8 prolonged the half-life of MRFAP1. Moreover, forced expression of MRFAP1 in HeLa cells caused growth retardation and genomic instability, leading to severe mitotic cell death. Thus, Cul7/FBXW8-mediated destruction of MRFAP1 is a regulatory component monitoring the anaphase-telophase transition and preventing genomic instability