Design and optimization of high-precision integrated experimental environments for large scientific facilities.

This study focuses on designing a high-precision laboratory for the Shenzhen superconducting soft x-ray free electron laser, addressing the stringent control requirements for temperature, humidity, and airflow that exceed conventional design methods. Using computational fluid dynamics simulation, we optimize airflow and temperature distribution to meet standards of 23 ± 0.1 °C, 37.

Research on dynamic modeling and control strategy of motor driven operating mechanism for 126 kV high voltage vacuum circuit breaker.

To mitigate the effects of motor load torque variations on the control performance of a 126 kV high voltage vacuum circuit breaker equipped with a motor driven operating mechanism, this paper presents the derivation of dynamic equations for the motor load torque. These equations, formulated using the Euler-Lagrange equation, Lagrange multipliers, and geometric constraints, are expressed in terms of a single independent variable: the angular displacement of the motor. Utilizing these equations, the load torque can be calculated in real-time using the motor position sensor feedback, and the motor control strategy is optimized through a feedforward method designed to actively compensate for load disturbances.

Effect of Chinese Medicines combined with transarterial chemoembolization on primary hepatic carcinoma: A systematic review and meta-analysis.

Background: To systematically evaluate the survival rate and postoperative adverse reactions of patients with hepatocellular carcinoma treated with traditional Chinese medicine combined with TACE by meta-analysis.

Methods: Four major literature databases (Cochrane Library, Embase, PubMed, and Web of Science) were retrieved to collect published English articles since 2009. After determining the random effect model or fixed utility model based on a heterogeneity test, odds ratios (ORs) and 95% confidence intervals (CIs) were calculated.