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用于高风险环境安全监测和可调热管理的具有分层核壳结构的耐化学品纱线

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Engineering 2024年第1期32卷 217-225页

作者： Duo Xu yingcun liu Can Ge Chong Gao Ze Chen Ziyi Su Haoran Gong Weilin Xu Jian Fang College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China

Chemical resistant textiles are vital for safeguarding humans against chemical hazards in various *** as industrialproduction,chemicalaccidents,laboratory activities,and road ***,the ideal integration of chemical resistance,thermal and moisture management,and wearer condition monitoring in conventional chemically protective textiles remains ***,the design,manufacturing,and use of stretchable hierarchical core-shell yarns(HCSYs)for integrated chemical resistance,moisture regulation,and smart sensing textiles are *** yarns con-tain helically elastic spandex,wrapped silver-plated nylon,and surface-structuredpolytetrafluo-roethylene(PTFE)yarns and are designed and manufactured based on a scalable fabrication *** addition to their ideal chemical resistance performance,HCSYs can function as multifunctional stretch-able electronics for real-time human motion monitoring and as the basic element of intelligent ***,a desirable dynamic thermoregulation function is achieved by exploiting the fabric structure with stretching *** HCSYs may provide prospective opportunities for the future development of smart protective textiles with high durability,flexibility,and scalability.

关键词： Hierarchical core-shell structure Chemical resistant yam Wearable strain sensor Thermoregulation

步态识别智能护膝的制备及其在关节康复训练中的应用

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纺织工程学报 2024年第4期2卷 86-96页

作者：卢妍李哲刘英存夏敏李杰方剑苏州大学纺织与纺织工程学院江苏苏州215021 苏州大学现代丝绸国家工程实验室江苏苏州215123 江苏省纺织产品质量监督检验研究院南京210007

随着智能可穿戴产品不断涌现,兼顾舒适性与智能性的服装越来越受消费者喜爱。智能传感设备与服装相结合,可以极大地发挥智能性、舒适性和质轻性等特点,从而广泛应用于人体监测、医疗康复及运动竞技等领域。将锦纶、导电银纱线和氨纶进... 详细信息

随着智能可穿戴产品不断涌现,兼顾舒适性与智能性的服装越来越受消费者喜爱。智能传感设备与服装相结合,可以极大地发挥智能性、舒适性和质轻性等特点,从而广泛应用于人体监测、医疗康复及运动竞技等领域。将锦纶、导电银纱线和氨纶进行编织,制备了一种弹性电容型纱线应变传感器,并将其成功集成到运动护膝中。通过合理布局传感器区域,确保传感器准确地感知人体运动,实现了具有高灵敏度和稳定性的多区域应变传感智能护膝的设计与制备。收集人体异常步态运动数据,采用高效的运动特征提取和机器学习算法对数据进行分析与识别,最终成功构建了智能关节损伤康复辅助训练系统,为康复训练领域带来了新的发展机遇。

关键词：智能纺织品护膝纱线应变传感器步态识别关节损伤康复训练机器学习

Sestrin2蛋白通过Nrf2/HO-1信号通路保护大鼠心肌细胞缺氧复氧损伤

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第三军医大学学报 2020年第15期42卷 1536-1542页

作者：刘英存李飞黄毅司良毅重庆医科大学附属第三医院心血管疾病中心重庆401120 陆军军医大学(第三军医大学)基础医学院生物医学分析测试中心重庆400038

目的探讨Sestrin2蛋白在大鼠心肌细胞缺氧复氧损伤中的作用及其机制。方法体外培养H9C2心肌细胞,构建心肌细胞缺氧复氧模型。细胞分为对照组、缺氧4 h组、复氧2 h组和复氧4 h组。采用CCK-8法检测细胞存活率;流式细胞术结合Annexin V/7AA... 详细信息

目的探讨Sestrin2蛋白在大鼠心肌细胞缺氧复氧损伤中的作用及其机制。方法体外培养H9C2心肌细胞,构建心肌细胞缺氧复氧模型。细胞分为对照组、缺氧4 h组、复氧2 h组和复氧4 h组。采用CCK-8法检测细胞存活率;流式细胞术结合Annexin V/7AAD荧光染色检测细胞凋亡;微量酶标法检测心肌细胞损伤标记物乳酸脱氢酶(lactate dehydrogenase,LDH)水平。构建针对Sestrin2蛋白沉默的siRNA与其阴性对照(si-NC),利用脂质体转染法导入H9C2心肌细胞,后将H9C2心肌细胞分为对照组、缺氧4 h+si-NC组(阴性对照组)、缺氧4 h+siRNA组、复氧4 h+si-NC(阴性对照组)、复氧4 h+siRNA组。Western blot检测Sestrin2蛋白的表达;流式细胞术结合Annexin V/7AAD荧光染色检测细胞凋亡;Western blot检测Sestrin2蛋白、核转录相关因子2(nuclear factor erythroid2-related factor 2,Nrf2)及血红素加氧酶-1(heme oxygenase-1,HO-1)的表达。结果与对照组比较,复氧4 h组细胞存活率降低(P<0.01),细胞凋亡率增加(P<0.05),LDH水平明显升高(P<0.01)。与对照组比较,Sestrin2蛋白表达在缺氧组和缺氧复氧组均显著增高(P<0.01),且缺氧复氧组Sestrin2蛋白表达量显著高于单纯缺氧组(P<0.01)。转染siRNA特异有效地下调了Sestrin2蛋白表达(P<0.05),同时细胞凋亡率显著增加(P<0.05),Nrf2蛋白表达降低(P<0.01),HO-1蛋白表达降低(P<0.05)。结论Sestrin2蛋白对缺氧复氧诱导的H9C2心肌细胞氧化损伤有保护作用,其机制可能与激活Nrf2/HO-1相关信号通路有关。

关键词： Sestrin2蛋白心肌缺氧复氧损伤凋亡

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完善医疗保障关注农民工健康

时代农机 2008年第5期 50-51页

作者：刘迎春长江大学医学院湖北荆州434000

解决农民工医疗保障问题是构建和谐社会的必经之路,本文阐述了农民工医疗保障的现状及存在的问题,并指出了建立完善的农民工医疗保障体系的重大意义及可采取的措施。

关键词：农民工医疗保障现状措施

Frequency Regulation of VSC-MTDC System with Offshore Wind Farms

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 275-286页

作者： Haoyu liu Chongru liu North China Electric Power University Beijing 102206China

Frequency regulation of voltage source converter-based multi-terminal high-voltage direct current(VSC-MTDC)system with offshore wind farms enhances the frequency stability by compensating the power for a disturbed AC ***,it is difficult to reasonably allocate frequency-regulation resources due to a lack of coordination mechanisms between wind farms and the MTDC ***,it is difficult for the frequency control of the wind farms to manage changes in wind speed;and the risk of wind-turbine stalls is ***,based on the kinetic energy of wind turbines and the power margin of the converters,the frequency-regulation capability of wind turbines is evaluated,and a dynamic frequency-support scheme considering the real-time frequency-support capability of the wind turbines and system frequency evolution is proposed to improve the frequency-support performance.A power adaptation technique at variable wind speeds is developed;the active power in the frequency-support stage and restoration stage is switched according to the wind speed.A hierarchical zoning frequency-regulation scheme is designed to use the frequency-regulation resources of different links in the MTDC system with wind *** simulation results show that the novel frequency-regulation strategy maintains frequency stability with wind-speed changes and avoids multiple frequency dips.

关键词： Wind generation voltage source converter-based multi-terminal high-voltage direct current(VSC-MTDC) frequency regulation cooperative control adaptive control variable wind speed

A Novel Design of a Pre-separation Panel Structure to Protect Against the Impact of an Explosion in an Aircraft Plenum Chamber

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Acta Mechanica Solida Sinica 2024年第1期37卷 166-180页

作者： Zongxing liu Xiang Yang Jun liu School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China COMAC Shanghai Aircraft Design and Research Institute Shanghai 201210China

To reduce the damage of the pressurizing panel structure of a fuselage caused by an explosion at the“least risk bomb location”in an aircraft structure,a new pre-separation panel structure was designed to resist blast ***,the dynamic strain response and morphology of impact damage of the new pre-separation panel were measured in an impact damage ***,the commercial software LS-DYNA was used to calculate the propagation of the blast shock wave,and the results were compared with empirical equations to verify the rationality of the numerical calculation ***,the fluid–structure coupling method was used to calculate the damage process of the pre-separation panel structure under the impact of an explosion wave and an impact *** calculated results were in good agreement with the test results,which showed the rationality of the calculation method and the *** residual strength of the damaged pre-separation panel was significantly higher than that of the original damaged *** results show that the new pre-separation panel structure is reasonable and has certain significance for guiding the design of plenum chambers with strong resistance to implosion for aircraft fuselages.

关键词： Pre-separation panel structure Explosive response Residual strength Aircraft plenum chamber Least risk bomb location

Effectiveness and safety of acupuncture in treatment of pregnancyrelated symptoms:a systematic review and Meta-analysis

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Journal of Traditional Chinese Medicine 2024年第1期44卷 16-26页

作者： liu Tingting liu Tongou liu Mingfu School of Traditional Chinese Medicine Clinical Medicine Hubei University of Traditional Chinese MedicineWuhan 430000China First Clinical College of Hubei University of Traditional Chinese Medicine Wuhan 430000China Department of Acupuncture and Tuina Affiliated Hospital of Hubei University of Traditional Chinese MedicineHubei Provincial Hospital of Traditional Chinese MedicineWuhan 430000China

OBJECTIVE:To systematically evaluate the efficacy and safety of acupuncture(AM)in the treatment of pregnancyrelated symptoms such as acute vomiting during ***:We comprehensively searched the available literature up to November 2021,including Pub Med,Embase,Cochrane Library,Chinese Biomedical Literature Database,and China National Knowledge Infrastructure Database,for randomized controlled trials(RCTs)on AM for the treatment of severe vomiting,insomnia,pharyngeal and pelvic pain,mood abnormalities,and dyspepsia during ***:Sixteen RCTs with a cumulative sample size of 1178 cases were *** these,964 patients were included in the *** Meta-analysis results showed that AM was more efficient than Western medicine in treating discomfort during pregnancy[odds ratio(OR)=1.19,95%confidence interval(CI)(1.11,1.28),P<0.01].AM was better than the control group in improving the visual analog scale scores[standard mean difference(SMD)=0.62,95%CI(0.53,0.71),P<0.01].AM was superior to the control group in improving Numerical Rating Scale(NRS)symptom scores[OR=7.31,95%CI(3.36,15.94),P<0.01].There was no significant difference in adverse effects between the AM and sham-AM groups and the analgesic drug group[OR=0.70,95%CI(0.39,1.28),P=0.25],but the treatment and control groups had mild adverse effects with a low ***:AM is more effective than other treatments or pharmacotherapy alone in the treatment of pregnancy-related symptoms,and is relatively ***,the quality of the included trials was rather poor,and high-quality studies are required to confirm our findings.

关键词： acupuncture pregnancy nausea vomiting sleep initiation and maintenance disorders low back pain pelvic pain mood abnormalities Meta-analysis systematic review

Stochastic Unit Commitment with High-Penetration Offshore Wind Power Generation in Typhoon Scenarios

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 535-546页

作者： Yanqi liu Dundun liu Hongcai Zhang State Key Laboratory of Internet of Things for Smart City and Department of Electrical and Computer Engineering University of MacaoMacao 999078China University of Macao Zhuhai UM Science and Technology Research Institute ZhuhaiChina

To tackle the energy crisis and climate change,wind farms are being heavily invested in across the *** China's coastal areas,there are abundant wind resources and numerous offshore wind farms are being *** secure operation of these wind farms may suffer from typhoons,and researchers have studied power system operation and resilience enhancement in typhoon ***,the intricate movement of a typhoon makes it challenging to evaluate its spatial-temporal *** published papers only consider predefined typhoon trajectories neglecting *** address this challenge,this study proposes a stochastic unit commitment model that incorporates high-penetration offshore wind power generation in typhoon *** adopts a data-driven method to describe the uncertainties of typhoon trajectories and considers the realistic anti-typhoon mode in offshore wind farms.A two-stage stochastic unit commitment model is designed to enhance power system resilience in typhoon *** formulate the model into a mixed-integer linear programming problem and then solve it based on the computationally-efficient progressive hedging algorithm(PHA).Finally,numerical experiments validate the effectiveness of the proposed method.

关键词： Unit commitment two-stage stochastic programming offshore wind farm typhoon

Devolatilization of high viscous fluids with high gravity technology

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Chinese Journal of Chemical Engineering 2024年第7期71卷 249-257页

作者： Jibing Qi Youzhi liu Yandong liu Taiyuan University Taiyuan 030032China Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering North University of ChinaTaiyuan 030051China

Volatile organic compounds(VOCs)are generally toxic and harmful substances that can cause health and environmental *** removal of VOCs from polymers has become a key *** effective devolatilization to remove VOCs from high viscous fluids such as polymer is necessary and is of great *** this study,the devolatilization effect of a rotating packed bed(RPB)was studied by using polydimethylsiloxane as the viscous fluid and acetone as the *** devolatilization rate and liquid phase volume(KLa)have been *** results indicated that the optimum conditions were the high-gravity factor of 60,liquid flow rate of 10 L·h^(-1),and vacuum degree of 0.077 *** dimensionless correlation of KLa was established,and the deviations between predicted and experimental values were less than±28%.The high-gravity technology will result in lower mass transfer resistance in the devolatilization process,enhance the mass transfer process of acetone,and improve the removal effect of *** work provides a promising path for the removal of volatiles from polymers in combination with high-gravity *** can provide the basis for the application of RPB in viscous fluids.

关键词： High-gravity technology Devolatilization rate High viscous fluid Volatile organic compounds(VOCs)