Control efficacy of complex networks

Acknowledgements W.-X.W. was supported by CNNSF under Grant No. 61573064, and No. 61074116 the Fundamental Research Funds for the Central Universities and Beijing Nova Programme, China. Y.-C.L. was supported by ARO under Grant W911NF-14-1-0504.Peer reviewedPublisher PD

Do Institutional Investors Exploit Market Anomalies? New Evidence from Alternative Mutual Funds

This paper investigates the anomaly trading behavior of a sample of mutual funds mimicking hedge fund strategies, namely alternative mutual funds (AMFs), based on both of their long and short equity positions. We document that AMFs trade on anomalies by buying underpriced stocks and short-selling overpriced peers. While AMFs’ buys and sells based on their long positions do not generate superior performance, their short-selling and covering activity based on their short positions significantly negatively predicts future abnormal returns. However, this predictability is mainly attributed to size and the nine anomaly characteristics considered. Overall, the results suggest that AMFs are sophisticated investors and that their short positions are more informative relative to their long positions

EAGAN: Efficient Two-stage Evolutionary Architecture Search for GANs

Generative adversarial networks (GANs) have proven successful in image generation tasks. However, GAN training is inherently unstable. Although many works try to stabilize it by manually modifying GAN architecture, it requires much expertise. Neural architecture search (NAS) has become an attractive solution to search GANs automatically. The early NAS-GANs search only generators to reduce search complexity but lead to a sub-optimal GAN. Some recent works try to search both generator (G) and discriminator (D), but they suffer from the instability of GAN training. To alleviate the instability, we propose an efficient two-stage evolutionary algorithm-based NAS framework to search GANs, namely EAGAN. We decouple the search of G and D into two stages, where stage-1 searches G with a fixed D and adopts the many-to-one training strategy, and stage-2 searches D with the optimal G found in stage-1 and adopts the one-to-one training and weight-resetting strategies to enhance the stability of GAN training. Both stages use the non-dominated sorting method to produce Pareto-front architectures under multiple objectives (e.g., model size, Inception Score (IS), and Fr\'echet Inception Distance (FID)). EAGAN is applied to the unconditional image generation task and can efficiently finish the search on the CIFAR-10 dataset in 1.2 GPU days. Our searched GANs achieve competitive results (IS=8.81$\pm$0.10, FID=9.91) on the CIFAR-10 dataset and surpass prior NAS-GANs on the STL-10 dataset (IS=10.44$\pm$0.087, FID=22.18). Source code: https://github.com/marsggbo/EAGAN.Comment: Accepted in ECCV2022, Guohao Yin and Xin He contributed equall

Diaqua­[5,5′-dicarb­oxy-2,2′-(ethane-1,2-di­yl)bis­(1H-imidazole-4-carboxyl­ato)]cobalt(II)

In the title complex, [Co(C12H8N4O8)(H2O)2], the CoII atom is coordinated by two N and two O atoms of the tetra­dentate 5,5′-dicarb­oxy-2,2′-(ethane-1,2-di­yl)bis­(1H-imidazole-4-carboxy­l­ate) anion. The slightly distorted octa­hedral coordination environment is completed by the O atoms of two water mol­ecules in axial positions. An intra­molecular O—H⋯O hydrogen bond between the carb­oxy and carboxyl­ate groups stabilizes the mol­ecular configuration. Adjacent mol­ecules are linked through O—H⋯O and N—H⋯O hydrogen bonds between the carb­oxy/carboxyl­ate groups, water mol­ecules and imidazole fragments into a three-dimensional network

人造血管在血液透析造瘘的应用及护理

Objective: To study the application of artificial blood vessels to build alternative standard arteriovenous fistula blood vessels for hemodialysis maintenance nursing. Methods: 17 cases of patients underwent artificial blood vessel transplantation, material for ptfe (PTEE), 30 cm in length, inner diameter 5mm, from 2012 to 2013 in Jinan military region general hospital. Artificial blood vessel transplantation is more operated on brachial vein, cephalic vein, median cubital vein and basilic vein. When the anastomosis among artificial blood vessels and brachial artery and vein anastomosis was established, the arterial end was on the inner side. When the anastomosis among brachial vein, median cubital vein and basilic vein was established, the arterial end was on the outside for the extension of vascular access. Results: 15 cases have hemodialysis after two months’ treatment, 1 case have artificial blood vessel fistula after swelling for 4 months, infection of thrombosis occurred one month after the operation in 1 case. Conclusion: Artificial blood vessel show good biocompatibility, high long-term patency rate, blood flow, and convenient puncture point. It builds the “lifeline” for the patients who are unable to establish a good vascular access. It is of great significance to improve the management of artificial blood vessel fistula for maintenance hemodialysis patients.目的  研究应用人造血管造瘘替代标准动静脉血管维持血液透析的护理。方法  本院自2012—2013年对17例血液透析患者进行人造血管移植术，材料为聚四氟乙烯（PTEE）材料，长度30cm，内径5mm。人造血管移植术多选择与肱动脉和头静脉或肘正中静脉、贵要静脉U型吻合。人造血管与肱动脉和头静脉吻合时，动脉端在内侧。但肱动脉与肘正中静脉、贵要静脉吻合时，为延长有效性血管通路，动脉端则在外侧。结果  15例术后2个月成熟顺利实施血液透析，1例持续肿胀4个月后开始应用，1例术后1个月出现感染血栓形成。结论  人造血管具有生物相容性好、长期通畅率高、血流量大、穿刺方便、穿刺部位充足等优点，为自身血管条件差、无法建立良好血管通路的透析患者提供了可靠的血管通路，为维持性血液透析患者建立了“生命线”。加强透析过程中的人造血管内瘘管理对于维持透析患者良好的血管通路具有重要意义

The Effects of Scraping Therapy on Local Temperature and Blood Perfusion Volume in Healthy Subjects

Objective. We aim to study the therapeutic effects of scraping by investigating the changes of temperature and local blood perfusion volume in healthy subjects after scraping stimulation, and to explore the mechanism of scraping stimulation from the points of microcirculation and energy metabolism. Methods. Twenty-three health subjects were included in this study. Local blood perfusion volume and body surface temperature was detected at 5 min before scraping stimulation, 0, 15, 30, 60 and 90 min after scraping using Laser Doppler imager and infrared thermograph. Results. Significant increase was noted in the blood perfusion volume in the scraping area within 90 minutes compared to the baseline level and non-scraping area (P < 0.001). Compared with non-scraping area, an increase of body temperature with an average of 1°C was observed after scraping stimulation (P < 0.01). Conclusion. Scraping can significantly improve the blood perfusion volume and increase the temperature in the scraping area, promoting the local blood circulation and energy metabolism