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Objectives: Patients undergoing a prior failed attempt of chronic total occlusion‐percutaneous coronary intervention (CTO‐PCI) represent a challenging subgroup across all patients undergoing CTO‐PCI. There are limited data on the effects of a prior failed attempt on the outcomes of subsequent CTO‐PCI. We aimed to compare the procedural results and 24‐month outcomes of prior‐failed‐attempt CTO‐PCI with those of initial‐attempt CTO‐PCI. Methods: Patients who underwent attempted CTO‐PCI between January 2017 and December 2019 were prospectively enrolled. We analyzed the procedural results and 24‐month major adverse cardiac events (MACE) between patients who underwent prior‐failed‐attempt and initial‐attempt CTO‐PCI. MACE was defined as a composite of cardiac death, target vessel‐related myocardial infarction, and ischemia‐driven target vessel revascularization (TVR) during follow‐up. Results: In total, 484 patients who underwent CTO‐PCI (prior‐failed‐attempt, n = 49; initial‐attempt, n = 435) were enrolled during the study period. After propensity score matching (1:3), 147 patients were included in the initial‐attempt group. The proportion of the Japanese‐CTO (J‐CTO) score ≥2 was higher in the patients who underwent prior failed attempt than in those who underwent initial attempt (77.5% vs. 38.8%, p < 0.001). The retrograde approach was more often adopted in the prior‐failed‐attempt group than in the initial‐attempt group (32.7% vs. 3.4%, [P< 0.001). Successful CTO revascularization rates were significantly lower in the prior‐failed attempt‐group than in the initial attempt group (53.1% vs. 83.3%, P < 0.001). The multivariate analysis revealed that J‐CTO score ≥2 [odds ratio (OR), 0.359; 95% confidence interval (CI), 0.159–0.812; P = 0.014], intravascular ultrasound procedure (OR, 4.640; 95% CI, 1.380–15.603; P = 0.013), and prior failed attempt (OR, 0.285; 95% CI, 0.125–0.648; P = 0.003) were the independent predictors for successful CTO revascularization. There were no significant differences in major procedural complications (2.0% vs. 0.7%, p = 0.438) and MACE rates (4.1% vs. 8.8%, p = 0.438) between the groups, mainly due to the TVR rate (4.1% vs. 8.2%, P = 0.522). Conclusions: Compared with initial‐attempt CTO‐PCI, prior‐failed‐attempt CTO‐PCI deserves more attention, since it is associated with a lower successful CTO revascularization rate. Prior failed attempt, J‐CTO score ≥2, and IVUS procedure are the determining factors for predicting successful CTO revascularization. There are no significantly different unfavorable outcomes between patients who undergo prior‐failed‐attempt and initial‐attempt CTO‐PCI. [ABSTRACT FROM AUTHOR]

While the widespread application of biometric identification technology has provided convenient services, the security, and privacy of personal data have also attracted increasing attention. Because biometric traits are unique, once an attack occurs, the information stored in the system will be permanently leaked. Thus, ensuring the security of biometric templates is a major challenge. In order to solve this problem, we propose a finger vein template protection method based on chaotic map. First, we randomize and scramble the finger vein features after feature extraction, disturbing the location distribution of the pixels. Second, on the basis of the chaotic features of the finger veins, binary quantization is applied to further ensure the safety of the template. Finally, the compact and safe finger vein template is directly stored in the database. Finger vein matching is realized in the encryption domain, which changes the way that the traditional finger vein recognition system directly stores biometric templates. We conducted a series of detailed experiments on the public dataset. The experimental results show that our method can ensure the safety of finger vein templates while maintaining stable recognition performance. Moreover, the method has universality for different feature‐extraction methods and meets the requirements of good biometric template protection. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC. [ABSTRACT FROM AUTHOR]

During the operation of the power transformer, the fault location often occurs in the winding, and the fault phenomenon caused by insufficient short‐circuit withstand ability of the winding is particularly prominent. Based on this problem, this article proposes an improved symplectic geometry mode decomposition (ISGMD) algorithm to evaluate the short‐circuit withstand ability of winding. The realization method is to use the algorithm to perform time‐frequency decomposition of the vibration signal of the transformer, calculate time‐domain eigenvalues of the symplectic geometry components to constitute the eigenvector, utilize principal component analysis to reduce dimensionality of the data. Finally, apply the obtained data to train and test the extreme learning machine. The correctness of the algorithm is analyzed by simulating vibration signals. At last, the experiment is designed and the evaluation standard is proposed, and the practicability of the intelligent evaluation model based on the method is verified. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC. [ABSTRACT FROM AUTHOR]

Background: The impact of socioeconomic developments on stroke incidence and mortality must be understood to target prevention strategies appropriately. We assessed the secular trends in stroke incidence and mortality in China based on data from the Global Burden of Disease Study 2016., Methods: Trends of stroke incidence and mortality of China was described in different categories of age, sex and stroke type using the GBD study database. Also a comparative study was conducted between China and Japan, U.S. to find reasonable references for development. Secular trends in incidence and mortality (per 100,000 population) were assessed for stroke, including ischemic and hemorrhagic stroke from 1990 to 2016. Population pyramid was used to illustrate changes in age- and sex-specific incidence and mortality rates., Results: During the study period, stroke incidence in China increased from 204.52 to 403.08 and mortality increased from 122.09 to 130.94; the corresponding age-standardized rates changed from 335.63 to 353.70 and from 231.28 to 132.84, respectively. Among those aged 15-49 and 50-69 years, the incidence rates of ischemic stroke and hemorrhagic stroke both tended to increase, whereas the mortality rates tended to decline in all age groups. The incidence and mortality were highest among those aged ≥70 years. Compared with the U.S. and Japan, age-standardized rates of incidence and mortality were higher in China., Conclusions: Although the incidence of stroke has increased in China, overall mortality has decreased. A priority of stroke prevention and control strategies will transition from reducing mortality to controlling the incidence in at-risk populations., Competing Interests: Declaration of Competing Interest No potential conflict of interest was reported by the authors., (Copyright © 2020 Elsevier Inc. All rights reserved.)