Echo State Neural Network Based on an Improved Gray Wolf Algorithm Predicts Porosity through Logging Data.

In oil exploration and development, many reservoir parameters are very essential for reservoir description, especially porosity. The porosity obtained by indoor experiments is reliable, but human and material resources will be greatly invested. Experts have introduced machine learning into the field of porosity prediction but with the shortcomings of traditional machine learning models, such as hyperparameter abuse and poor network structure. In this paper, a meta-heuristic algorithm (Gray Wolf Optimization algorithm) is introduced to optimize the ESN (echo state neural) network for logging porosity prediction. Tent mapping, a nonlinear control parameter strategy, and PSO (particle swarm optimization) thought are introduced to optimize the Gray Wolf Optimization algorithm to improve the global search accuracy and avoid local optimal solutions. The database is constructed by using logging data and porosity values measured in the laboratory. Five logging curves are used as model input parameters, and porosity is used as the model output parameter. At the same time, three other prediction models (BP neural network, least squares support vector machine, and linear regression) are introduced to compare with the optimized models. The research results show that the improved Gray Wolf Optimization algorithm has more advantages than the ordinary Gray Wolf Optimization algorithm in terms of super parameter adjustment. The IGWO-ESN neural network is better than all machine learning models mentioned in this paper (GWO-ESN, ESN, BP neural network, least squares support vector machine, and linear regression) in terms of porosity prediction accuracy.

Analysis on key points for construction of trauma emergency center of Jiangxi Province / 中华创伤杂志

Trauma is the leading cause of death for people under 40 years old in the world. At present, the rescue and treatment system of trauma patients in China is not yet well established, and the mortality of trauma patients is higher than those in the developed countries. Improving the treatment system is the key to reducing the trauma mortality. In order to innovate the service mode of trauma first aid, further promote the establishment of regional trauma first aid system, improve the ability of trauma treatment, reduce the mortality and disability rate of trauma patients in Jiangxi Province, recently Health Commission of Jiangxi Province and the First Affiliated Hospital of Nanchang University have reached a consensus on the establishment of Jiangxi trauma first aid center. In order to provide reference for the construction of trauma treatment system, the author analyzes the following aspects including functional positioning, basic requirements, organization management, and evaluation of core indicators.

Analysis on key points for construction of trauma emergency center of Jiangxi Province / 中华创伤杂志

Trauma is the leading cause of death for people under 40 years old in the world.At present,the rescue and treatment system of trauma patients in China is not yet well established,and the mortality of trauma patients is higher than those in the developed countries.Improving the treatment system is the key to reducing the trauma mortality.In order to innovate the service mode of trauma first aid,further promote the establishment of regional trauma first aid system,improve the ability of trauma treatment,reduce the mortality and disability rate of trauma patients in Jiangxi Province,recently Health Commission of Jiangxi Province and the First Affiliated Hospital of Nanchang University have reached a consensus on the establishment of Jiangxi trauma first aid center.In order to provide reference for the construction of trauma treatment system,the author analyzes the following aspects including functional positioning,basic requirements,organization management,and evaluation of core indicators.

Effect of acteoside on dysfunction of learning and memory and oxidative stress in rats with vascular dementia / 中华行为医学与脑科学杂志

Objective To explore the effects of acteoside on dysfunction of learning and memory and the protective effect of oxidative stress in rats with vascular dementia.Methods 30 SD rats were randomly divided into sham group,model group,nicergoline group,low-dose acteoside group and high-dose acteoside group,with 6 rats in each group.Preparation of vascular dementia model by 2-vessed occlusion.The ability of exploring and learning and memory in rats were detected by step down test and avoid dark test.Determination of malondialdehyde (MDA),reactive oxygen species (ROS) and glutathione peroxidase (GSH-PX) activity in serum and brain tissue was conducted by Elisa.Results Autonomic activity test showed that the frequency and activity of autonomous activity in the model group were significantly lower than those in the sham group(P＜0.01),the frequency of autonomous activity in each administration group was significantly higher than that in the model group (P＜0.01),and the central activity time in the high-dose group was significantly higher than that in the model group (P＜0.01).Step down test and avoid dark test showed that the latency of the model group was significantly lower than that of the sham group.(Model group of step down test:(25.33 ± 3.01) s,Sham group of step down test:(56.83 ± 15.90)) (P＜ 0.01).(Model group of avoid dark test:(15.67 ± 3.61) s,Sham group of avoid dark test:(135.82±44.00) s) (P＜0.01).The latency of low dose group was significantly higher than that of model group.(Low dose group of step down test:(46.40±14.32) s) (P＜0.01).(Low dose group of avoid dark test (44.20± 8.26)s) (P＜0.05).Step down test and avoid dark test showed that the number of mistakes in the model group was significantly higher than that in the sham operation group(P＜0.01).The number of errors in nicergoline group and the low dose group was significantly lower than that in the model group (P＜0.01,P＜0.05).In serum,the content of MDA and ROS in model group was significantly higher than that in sham group (P＜0.01) while the activity of GSH-PX in model group was significantly lower than that of sham group.The content of MDA in the other groups was significantly lower than that in the model group (P＜0.01).The content of ROS in the nicergoline group and low dose group was significantly lower than that in the model group (P＜0.05,P＜0.0l).The activity of GSH-PX in high dose group was significantly higher than that in model group (P＜0.01).In brain tissue,the content of MDA and Ros in model group was significantly higher than that in sham group (P＜0.01).The content of MDA and ROS in low dose group and high dose group were significantly lower than that in model group (P＜0.05,P＜0.01).Conclusion Acteoside can improve the dysfunction of learning and memory and depressive mood disorder caused by vascular dementia and reduce oxidative stress injury by decreasing the content of MDA-ROS and increasing the activity of GSH-PX enzyme.