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Blockchain technology could effectively solve the problems of lack of trust,malicious tampering and false transactions.However,the open and transparent characteristics of the blockchain make the distributed energy trading model based on the blockchain extremely vulnerable to be attacked,leading to the disclosure of user’s privacy.Therefore,a privacy-preserving scheme BLDP-AM based on differential privacy algorithm and account mapping technology is proposed to protect the privacy information of trading data.Our scheme redesigns the data perturbation mechanism of the local differential privacy algorithm to make it applicable to blockchain technology,and constructs the BLDP algorithm based on this perturbation mechanism to protect the privacy of transaction data.At the same time,in order to ensure the correctness of trading and hide the characteristics of the trading curve,our scheme first associates users with multiple accounts through account mapping technology,then uses the exponential smoo-thing prediction algorithm to calculate the trading prediction value of each account,and finally uses the BLDP algorithm to perturb the trading prediction value to obtain the real trading value and conduct trading.Our scheme not only guarantee the correctness of transactions but also achieve the purpose of protecting the privacy of trading data.The privacy analysis proves the feasibility of the scheme in protecting user privacy,and the experimental analysis shows that the scheme has better performance.

Background The purpose of this study was to investigate the effect of applying telehealth education to home care of infants after congenital heart disease (CHD) surgery. Methods A prospective randomized controlled study was conducted from July 2020 to February 2021 in Fujian Children's Hospital to compare the home care condition of infants after CHD surgery between the intervention group and the control group. Results At 3 months after discharge, parents' caring ability and CHD knowledge in the intervention group were significantly better than those in the control group and were significantly improved compared with those at discharge time (P  < 0.05). The parental care burden in the intervention group was significantly lower than that in the control group and was significantly lower than that at discharge time (P  < 0.05). During the follow-up period, the rate of loss of follow-up and complications in the intervention group were significantly lower than those in the control group (P  < 0.05). Conclusion Telehealth education via WeChat can effectively improve the knowledge of disease and home care ability of parents of infants after CHD surgery and reduce their home care burden, which can effectively reduce the incidence of complications and lost to follow-up rate after discharge. [ABSTRACT FROM AUTHOR]

Many studies have shown that parents of children with congenital heart disease have more stress, anxiety and depression. This study was aimed to explore the effect of implementing WeChat-assisted health education and preoperative care on parents of children with the restrictive ventricular septal defect to improve the psychological state. A prospective randomized controlled study was conducted in a provincial hospital in China. Participants were randomly divided into an intervention group and a control group to explore the psychological state of parents of children with the restricted ventricular septal defect. Before surgery, the state-trait anxiety inventory scale score (STAI) of the WeChat group were 26.8 ± 8.2 and 27.3 ± 7.0, which were significantly higher than those of the leaflet group (37.6 ± 12.9 and 39.3 ± 11.7). Compared with the STAI score at the first visit, the WeChat group preoperative score was significantly lower (P < 0.05). The rate of loss to follow-up in the WeChat group (0%) was significantly lower than that of the leaflet group (14.3%). The complication of the leaflet group was significantly higher than that of the WeChat group. Health education and preoperative care for parents of children with restrictive ventricular septal defect through WeChat can effectively improve the parents' mental state and reduce the incidence of complications and the rate of loss to follow-up. [ABSTRACT FROM AUTHOR]

The purpose of this study was to summarize the clinical experience with laparoscopic percutaneous extraperitoneal closure of the internal ring using an epidural needle for inguinal hernias in girls. A total of 462 girls with inguinal hernias participated in this study from January 2013 to June 2019. Laparoscopic percutaneous extraperitoneal closure of the internal ring via an epidural needle was used to treat these patients. All 462 girls with an inguinal hernia successfully underwent laparoscopic surgery. The operative times for unilateral and bilateral inguinal hernias were 15 (11–25) minutes and 23 (18–33) minutes, respectively. All patients were discharged 1–2 days after the operations. During the hospitalization and follow-up periods, none of the following complications were observed: hernia recurrence, umbilical hernia, abdominal wall vascular injury, intestinal injury or bladder injury. However, there were six patients with complications: two cases of poor healing of the umbilical incision, three cases of suture granulomas and one case of groin traction pain and discomfort. Laparoscopic percutaneous extraperitoneal closure of the internal ring using an epidural needle is a safe and feasible method for the treatment of inguinal hernias in girls. This method has the advantages of limited trauma, no scarring and a good cosmetic effect. [ABSTRACT FROM AUTHOR]