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Emergency rescue of a patient with hemorrhagic shock caused by superior mesenteric artery rupture:A case report

World Journal of Clinical Cases 2024年第18期12卷 3567-3574页

作者： Xian-Ping Lin Xin-Li Guo he-feng tian Zheng-Rong Wu Wei-Jie Yang Hong-Ying Pan Nursing Department Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhou 310020Zhejiang ProvinceChina Department of General Surgery Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhou 310020Zhejiang ProvinceChina Department of Obstetrics and Gynecology Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhou 310020Zhejiang ProvinceChina

BACKGROUND Superior mesenteric artery(SMA)injuries rarely occur during blunt abdominal injuries,with an incidence of35 beats/min),and blood pressure as low as 20/10 mmHg(1 mmHg=0.133 kPa).Computed tomography revealed ... 详细信息

BACKGROUND Superior mesenteric artery(SMA)injuries rarely occur during blunt abdominal injuries,with an incidence ofhe clinical manifestations mainly include abdominal hemorrhage and peritoneal irritation,which progress rapidly and are easily *** and accurate diagnosis and timely effective treatment are greatly significant in managing emergent *** report describes emergency rescue by a multidisciplinary team of a patient with hemorrhagic shock caused by SMA *** SUMMARY A 55-year-old man with hemorrhagic shock presented with SMA *** admission,he showed extremely unstable vital signs and was unconscious with a laceration on his head,heart rate of 143 beats/min,shallow and fast breathing(frequency>35 beats/min),and blood pressure as low as 20/10 mmHg(1 mmHg=0.133 kPa).Computed tomography revealed abdominal and pelvic hematocele effusion,suggesting active *** patient was suspected of partial rupture of the distal SMA *** patient underwent emergency mesenteric artery ligation,scalp suture,and liver laceration *** view of conditions with acute onset,rapid progression,and high bleeding volume,key points of nursing were conducted,including activating emergency protocol,opening of the green channel,and arranging relevant examinations with various medical staff for quick *** seamless collaboration of the multidisciplinary team helped shorten the preoperative preparation *** laparotomy exploration and mesenteric artery ligation were performed to mitigate hemorrhagic shock while establishing efficient venous accesses and closely monitoring the patient’s condition to ensure hemodynamic *** measures were taken to avoid intraoperative hypothermia and *** After 3.5 h of emergency rescue and medical care,bleeding was successfully controlled,and the patient’s condition was ***,the patient was transferred to the intensive care unit for continuous mon

关键词： Superior mesenteric artery hemorrhagic shock Arterial ligation Emergency nursing Case report

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响应面法优化菊苣叶黄酮提取工艺及其抗氧化活性分析

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饲料研究 2024年第15期47卷 57-61页

作者：韩舒晨何天枫李良玉黑龙江八一农垦大学食品学院黑龙江大庆163319 国家杂粮工程技术研究中心黑龙江大庆163319

试验旨在提高菊苣叶的饲用价值。试验通过响应面法优化菊苣叶中黄酮的提取工艺,评估其抗氧化活性。在单因素试验的基础上,以黄酮得率作为响应变量,对影响菊苣叶中黄酮得率的3个因素进行Box-Behnken设计与优化,分析提取过程中液料比、提... 详细信息

试验旨在提高菊苣叶的饲用价值。试验通过响应面法优化菊苣叶中黄酮的提取工艺,评估其抗氧化活性。在单因素试验的基础上,以黄酮得率作为响应变量,对影响菊苣叶中黄酮得率的3个因素进行Box-Behnken设计与优化,分析提取过程中液料比、提取温度和提取时间对菊苣叶黄酮得率的影响。结果表明,优化后的菊苣叶黄酮的提取条件为液料比37.0 mL/g、提取时间59.2 min、提取温度43℃。此条件下菊苣叶黄酮得率为3.09%,与预测值基本一致,表明此优化方法合理可靠。体外抗氧化活性试验显示,菊苣叶黄酮对1,1-二苯基-2-三硝基苯肼(DPPH)自由基、2,2-联氮-二(3-乙基-苯并噻唑-6-磺酸)二铵盐(ABTS+)自由基的清除能力与浓度呈计量关系。研究表明,菊苣叶黄酮的抗氧化能力较强,具有作为饲料添加剂开发的潜力。

关键词：菊苣叶黄酮响应面提取工艺抗氧化活性

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Properties of Ultra-low Thermal Expansion LAS Transparent Glass-ceramics Prepared by Spodumene

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 541-550页

作者：何峰何子君 ZHOU Zhiqiang tian Yingliang ZHAO Zhiyong School of Materials Science and Engineering Beijing University of TechnologyBeijing 100124China Department of Functional Material Research Central Iron and Steel Research InstituteBeijing 100081China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China National Engineering Research Center of FPD Glass Technology Xianyang 712000China

The glass-ceramics were prepared with the spodumene mineral as the main raw material,and the effects of ZrO_(2)replacing TiO_(2)on the samples were systematically *** results show that the substitution of ZrO_(2)for TiO_(2)is not conductive to precipitate𝛽β-quartz solid solution phase,but can improve the transparency and flexural strength of *** the glass-ceramic with the highest visible light transmittance(87%)and flexural strength(231.80 MPa)exhibits an ultra-low thermal expansion of-0.028×10^(-7)K^(-1)in the region of 30-700℃.

关键词： ultra-low thermal expansion LAS transparent glass-ceramics substitution of ZrO_(2)for TiO_(2) spodumene mineral

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Frequency Domain Fatigue Evaluation on SCR Girth-Weld Based on Structural Stress

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China Ocean Engineering 2024年第2期38卷 255-270页

作者： ZHANG Long ZHAO tian-feng College of Safety and Ocean Engineering China University of Petroleum(Beijing)Beijing 102249China

The Steel Catenary Riser(SCR)is a vital component for transporting oil and gas from the seabed to the floating *** harsh environmental conditions and complex platform motion make the SCR’s girth-weld prone to fatigue *** structural stress fatigue theory and Master S-N curve method provide accurate predictions for the fatigue damage on the welded joints,which demonstrate significant potential and compatibility in multi-axial and random fatigue ***,we propose a new frequency fatigue model subjected to welded joints of SCR under multiaxial stress,which fully integrates the mesh-insensitive structural stress and frequency domain random process and transforms the conventional welding fatigue technique of SCR into a spectrum analysis technique utilizing structural ***,a full-scale FE model of SCR with welds is established to obtain the modal structural stress of the girth weld and the frequency response function(FRF)of modal coordinate,and a biaxial fatigue evaluation about the girth weld of the SCR can be achieved by taking the effects of multi-load correlation and pipe-soil interaction into *** research results indicate that the frequency-domain fatigue results are aligned with the time-domain results,meeting the fatigue evaluation requirements of the SCR.

关键词： SCR girth weld random vibration self(cross)power spectrum structural stress method biaxial fatigue damage

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Oxygen vacancy boosting Fenton reaction in bone scaffold towards fighting bacterial infection

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International Journal of Extreme Manufacturing 2024年第1期6卷 296-311页

作者： Cijun Shuai Xiaoxin Shi feng Yang Haifeng tian Pei feng State Key Laboratory of Precision Manufacturing for Extreme Service Performance College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083People’s Republic of China Institute of Additive Manufacturing Jiangxi University of Science and TechnologyNanchang 330013People’s Republic of China College of Mechanical Engineering Xinjiang UniversityUrumqi 830017People’s Republic of China

Bacterial infection is a major issue after artificial bone transplantation due to the absence of antibacterial function of bone scaffold,which seriously causes the transplant failure and even amputation in severe *** this study,oxygen vacancy(OV)defects Fe-doped Ti O2(OV-FeTiO2)nanoparticles were synthesized by nano TiO2and Fe3O4via high-energy ball milling,which was then incorporated into polycaprolactone/polyglycolic acid(PCLGA)biodegradable polymer matrix to construct composite bone scaffold with good antibacterial activities by selective laser *** results indicated that OV defects were introduced into the core/shell-structured OV-FeTiO2nanoparticles through multiple welding and breaking during the high-energy ball milling,which facilitated the adsorption of hydrogen peroxide(H2O2)in the bacterial infection microenvironment at the bone transplant *** accumulated H2O2could amplify the Fenton reaction efficiency to induce more hydroxyl radicals(·OH),thereby resulting in more bacterial deaths through·OH-mediated oxidative *** antibacterial strategy had more effective broad-spectrum antibacterial properties against Gram-negative Escherichia coli(***)and Gram-positive Staphylococcus aureus(***).In addition,the PCLGA/OV-FeTiO2scaffold possessed mechanical properties that match those of human cancellous bone and good biocompatibility including cell attachment,proliferation and osteogenic differentiation.

关键词： bacterial infection bone scaffold selective laser sintering Fenton reaction antibacterial properties

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A Fractional-Order Ultra-Local Model-Based Adaptive Neural Network Sliding Mode Control of n-DOF Upper-Limb Exoskeleton With Input Deadzone

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 760-781页

作者： Dingxin he HaoPing Wang Yang tian Yida Guo the School of Automation Nanjing University of Science and TechnologyNanjing 210094China IEEE Norinco Group Institute of Navigation and Control Technology Beijing 100089China

This paper proposes an adaptive neural network sliding mode control based on fractional-order ultra-local model for n-DOF upper-limb exoskeleton in presence of uncertainties,external disturbances and input *** the model complexity and input deadzone,a fractional-order ultra-local model is proposed to formulate the original dynamic system for simple controller ***,the control gain of ultra-local model is considered as a *** fractional-order sliding mode technique is designed to stabilize the closed-loop system,while fractional-order time-delay estimation is combined with neural network to estimate the lumped ***,a fractional-order ultra-local model-based neural network sliding mode controller(FO-NNSMC) is ***,to avoid disadvantageous effect of improper gain selection on the control performance,the control gain of ultra-local model is considered as an unknown ***,the Nussbaum technique is introduced into the FO-NNSMC to deal with the stability problem with unknown ***,a fractional-order ultra-local model-based adaptive neural network sliding mode controller(FO-ANNSMC) is ***,the stability analysis of the closed-loop system with the proposed method is presented by using the Lyapunov ***,with the co-simulations on virtual prototype of 7-DOF iReHave upper-limb exoskeleton and experiments on 2-DOF upper-limb exoskeleton,the obtained compared results illustrate the effectiveness and superiority of the proposed method.

关键词： Adaptive control input deadzone model-free control n-DOF upper-limb exoskeleton neural network

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Effect of geometry simplification and boundary condition specification on flow field and aerodynamic noise in the train head and bogie region of high-speed trains

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第9期25卷 716-731页

作者： Jiawei SHI Yuan he Jiye ZHANG tian LI State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong UniversityChengdu 610031China Institute of Sound and Vibration Research Faculty of Engineering and Physical SciencesUniversity of SouthamptonSouthampton SO171BJUK

The purpose of this study is to determine a suitable modeling method to make computational fluid dynamics(CFD)simulation more efficient for aeroacoustics optimization of the bogie region of high-speed *** this end,four modeling methods are considered,which involve different geometry simplifications and boundary condition *** corresponding models are named the three-car marshalling model,computational domain shortening model,carbody shortening model,and sub-domain *** the detached eddy simulation(DES)model and Ffowcs Williams-Hawkings(FW-H)equation,the unsteady flow field and far-field noise of the four models are *** evaluate the effect of the different modeling methods,the time-averaged flow field,fluctuating flow field,and far-field noise results of the four models are compared and analyzed in detail with the results of the three-car marshalling model used as basis for *** results show that the flow field results of the bogie region predicted by the four models have relatively high ***,the usage of the non-time varying outlet boundary conditions in the computational domain shortening model and sub-domain model could affect the pressure fluctuation on the upstream carbody *** only the bogie region is used as the source surface,the differences between the far-field noise results of the three simplified models and the three-car marshalling model are all within 1 dB;when the train head is used as the source surface,the results of the carbody shortening model and the three-car marshalling model are more consistent.

关键词： Bogie region Train head Flow field Aerodynamic noise Geometry simplification Boundary conditions

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Short-time maritime target detection based on polarization scattering characteristics

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Journal of Systems Engineering and Electronics 2024年第1期35卷 55-64页

作者： CheN Shichao LUO feng tian Min LYU Wanghan College of Computer and Information Engineering(College of Artificial Intelligence) Nanjing Tech UniversityNanjing 211816China Hangzhou Institute of Technology Xidian UniversityHangzhou 311200China

In this paper,a detection method combining Cameron decomposition based on polarization scattering characteristics in sea clutter background is ***,the Cameron decomposition is exploited to fuse the radar echoes of full polarization channels at the data *** to the artificial material structure on the surface of the target,it can be shown that the non-reciprocity of the target cell is stronger than that of the clutter ***,based on the analysis of the decomposition results,a new feature with scattering geometry characteristics in polarization domain,denoted as Cameron polarization decomposition scattering weight(CPD-SW),is extracted as the test statistic,which can achieve more detailed descriptions of the clutter scattering characteristics utilizing the difference between their scattering ***,the superiority of the proposed CPD-SW detector over traditional detectors in improving detection performance is verified by the IPIX measured dataset,which has strong stability under short-time observation in threshold detection and can also improve the separability of feature space zin anomaly detection.

关键词： sea clutter small target radar detection Cameron decomposition characteristics analysis

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Recycling the spent electronic materials to construct a highperformance Cu_(1.94)S/ZnS heterostructure anode of sodium-ion batteries

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Nano Research 2024年第5期17卷 4006-4015页

作者： Xiaowei he tianshuai Wang Lidong tian Qiuyu Zhang School of Chemistry and Chemical Engineering Xi’an Key Laboratory of Functional Organic Porous MaterialsKey Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information TechnologyNorthwestern Polytechnical UniversityXi’an 710072China Chongqing Science and Technology Innovation Center of Northwestern Polytechnical University Chongqing 401135China College of Materials Science and Engineering Xi’an University Science and TechnologyXi’an 710054China

heterostructure engineering by coupling different nanocrystals has received extensive attention because it can enhance the reaction kinetics of the anode of sodium-ion batteries(SIBs).However,constructing high-quality heterostructure anode materials through green and environmentally friendly methods remains a ***,we have proposed a simple one-step method by recycling the electronic waste metal materials to synthesize the Cu_(1.94)S/ZnS heterostructure *** with the experimental analysis and first principle calculations,we find that the synergistic effect of different components in heterostructure structures can significantly enhance the reversible capacity and rate performance of anode *** on the constructed Cu_(1.94)S/ZnS anode,we obtain a superior reversible capacity of 440 mAh·g^(-1) at 100 mA·g^(-1) and 335 mAh·g^(-1) after 3000 cycles at 2000 mA·g^(-1).Our work sheds new light on designing high-rate and capacity anodes for SIBs through the greenness synthesis method.

关键词： sodium-ion batteries heterostructure reversible capacity environmentally synthesis process

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刃针结合电针治疗对膝关节骨关节炎患者膝关节功能的影响

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针刺研究 2024年第4期49卷 398-402页

作者：马洁褚晓彦刘伙生孙吉雅詹红生徐建德何天峰丁金磊周丽艳段希栋王茜邴兴红陶善平上海市嘉定区中医医院针灸科上海201800

目的:比较刃针结合电针与单纯电针治疗膝关节骨关节炎(KOA)的临床疗效及对膝关节功能的影响。方法:将68例KOA患者运用随机数字表法随机分为两组,分别为刃针组34例和电针组34例。其中刃针组采用刃针结合电针治疗,电针组采用单纯电针治疗... 详细信息

目的:比较刃针结合电针与单纯电针治疗膝关节骨关节炎(KOA)的临床疗效及对膝关节功能的影响。方法:将68例KOA患者运用随机数字表法随机分为两组,分别为刃针组34例和电针组34例。其中刃针组采用刃针结合电针治疗,电针组采用单纯电针治疗,两组电针治疗均隔日1次,每周治疗3次,共治疗4周;刃针组在电针基础上增加刃针治疗,每周治疗1次,共治疗4周。治疗前、治疗后、治疗后1个月、治疗后3个月进行计时起立-步行测验(TUG)、9台阶-楼梯攀登测试(9-SCT)、膝关节功能[西安大略和麦马斯特大学骨关节炎指数可视化量表(WOMAC)]评分。结果:通过意向性分析,与治疗前比较,两组患者治疗后、随访1个月和随访3个月时的TUG结果、9-SCT结果、WOMAC评分均显著降低(P<0.05);与同时间点电针组相比,刃针组治疗后和随访1个月时的TUG结果显著降低,刃针组治疗后的WOMAC评分显著降低(P<0.05);与本组治疗后比较,刃针组随访1个月时的WOMAC评分显著降低(P<0.05)。结论:两种治疗均能改善患者膝关节功能,但是刃针结合电针更能明显提高患者的步速,改善患者的关节疼痛、晨僵等不适症状。刃针结合电针治疗KOA安全有效,并且有较好的远期疗效。

关键词：膝关节骨关节炎刃针电针临床疗效关节功能

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