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Sun Yunyun,Zhang Jun,Feng ShanWu 대한신경정신의학회 2023 PSYCHIATRY INVESTIGATION Vol.20 No.4
Objective Stress and cognitive impairment are common postoperative complications in elder patients who have undergone hip surgery. The objective of the work is to evaluate the effects of remimazolam supplemented to combined general anesthesia in improving stress and cognitive performance.Methods A total of 120 patients were included to receive a low dose of remimazolam (0.1 mg/kg/h) intravenously combined with general anesthesia or general anesthesia alone during hip surgery. Assessments were used for evaluating cognitive and psychological performance respectively before surgery (T0), 24 h (T5), and 72 h (T6) after surgery. Physiological parameters including mean artery pressure, heart rate, and blood oxygen levels (SpO2) were measured at T0, 30 min after anesthesia (T1), and completion of surgery (T2). Stress indexes including serum cortisol and norepinephrine levels were measured at T0, T5, and T6. The visual analog scale pain scores were also acquired at 6 h after surgery, 12 h after surgery, and T6. Serum interleukin-6 and tumor necrosis factor-α levels were acquired at T0, T2, and T6.Results Heart rate and SpO2 levels in the combination group were significantly improved compared to the control group. Serum cortisol and norepinephrine levels were the highest at T1 and decline over time until T5 in both groups, the two stress indexes of the combination group were significantly lower at T1 and T2.Conclusion Remimazolam supplemented to combined general anesthesia demonstrated significant benefit in reducing stress and cognitive dysfunction in elder patients who underwent hip surgery.
A Feasibility Research on the Mechanism of Cold Chain Business in Deppon Logistics
Yanni Li,Yunyun Xu,Baichao Gong,Haopeng Sun,Fuguang Zhao 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.3
Cold chain distribution is always well-known as the “Mount Everest” in international logistics industry, while the rapid development in recent years of domestic meat, frozen food, cold drinks industry and dairy industry brought a leapfrog growth of cold chain logistics, which respectively stimulated the need for logistics outsourcing service from Third Party Logistics. Those companies demanding for exploiting cold chain business on one hand requires a complete set of refrigerated logistics chains, on the other hand also requires enterprises to establish a good and professional transport system with refrigerated operation equipment, which are precisely the weakness of manufacturing enterprises. Thus, outsourcing of cold chain logistics to a third party is the best choice for companies to focus on its core business. By analyzing the bulletins of International Cold Chain Logistics Summits, this paper shows the problems of cold chain industry in China and points out the potentials for its future development. It further analyzes the feasibility of launching cold chain business of Deppon Logistics. The purpose is to offer some suggestions to work out the barriers and set up a modern operation system under the big data age in Deppon.
Fuqi Xie,Yunyun Sun,Shijing Wu,Qiang Zhang,Xiaoyong Li 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.9
The current research on wind turbine gearboxes (WTG) considering multiplefactors influence mainly focuses on dynamic response. However, load sharing performance (LSP) is also extremely important for gear transmission system reliability. In this paper, considering the comprehensive effects of manufacturing errors, assembly errors, clearance floating between stages, mesh stiffness and time-varying load, a coupled translation-torsion dynamic model for WTG was developed to study the LSP. Based on the amplitude variations of timevarying mesh stiffness caused by tooth crack, an approach is provided to introduce the tooth crack into the dynamic model. The results indicate the LSP is mostly sensitive to multiple-errors and severe tooth crack, followed by the time-varying load. The LSP of a system is periodically affected by tooth crack, and the fluctuation ranges increase with the crack growth. Furthermore, the crack of sun gear has greater influence on LSP than that of planet and ring gear.