检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

基于BP神经网络的电池容量估计

船电技术 2024年第2期44卷 29-32页

作者：蔡明扬李至田侃邓念本武汉船用电力推进装置研究所武汉430064

电池充足的容量是保障通信基站电池储能系统稳定运行的关键因素之一。通信基站按照要求每年进行例行核对性放电,该方法人工成本较高。本文提出一种基于BP神经网络的电池容量估计算法,利用大量的电池放电过程中电压变化数据建立电池模型... 详细信息

电池充足的容量是保障通信基站电池储能系统稳定运行的关键因素之一。通信基站按照要求每年进行例行核对性放电,该方法人工成本较高。本文提出一种基于BP神经网络的电池容量估计算法,利用大量的电池放电过程中电压变化数据建立电池模型,实现对电池容量的估计。

关键词：组合脉冲放电法电池容量估计蓄电池 BP神经网络

Neurotoxicity due to dimethylamine borane poisoning via skin absorption:a case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Emergency Medicine 2022年第6期13卷 500-503页

作者： Guang-cai Yu Ya-qian Li tian-zi Jian Bao-tian kan Si-qi Cui Ping Han Xiang-dong Jian Department of Poisoning and Occupational Diseases Emergency MedicineQilu Hospital of Shandong UniversityCheeloo College of MedicineShandong UniversityJinan 250012China Shandong University of Traditional Chinese Medicine Jinan 250012China Department of Geriatric Medicine Qilu Hospital of Shandong UniversitySchool of NursingCheeloo College of MedicineShandong UniversityJinan 250012China School of Public Health Cheeloo College of MedicineShandong UniversityJinan 250012China

Dear editor,Dimethylamine borane(DMAB,CAS no.74-94-2),also called boron-dimethylamine complex,is a white crystalline solid.It has an amine odour under mild conditions.[1]As an excellent reducing agent,DMAB is widely used in the semiconductor industry,pharmaceutical manufacturing,[2]oligomer and polymer production,and hydrogen storage.[3]Acute DMAB exposure may cause eye or respiratory irritation,throat discomfort,vomiting,diarrhoea,and pulmonary oedema.[1,4]Isolated reports indicated that DMAB exposure causes acute cerebellar oedema and peripheral neuropathy.[1,5,6]Herein,we report a case of DMAB poisoning via dermal absorption in which the central and peripheral nervous systems were the primary sites of toxic injury.We highlight the use of brain magnetic resonance imaging(MRI)and electromyography(EMG)for evaluation after exposure.

关键词： conditions. absorption boron

Dual-Wavelength Spectrum-Shaped Mid-Infrared Pulses and Steering High-Harmonic Generation in Solids

在线全文

学校读者我要写书评

暂无评论

Ultrafast Science 2023年第3期3卷 19-28页

作者： Linzhen He Weizhe Wang kan tian Maoxing Xiang Zhongjun Wan Bo Hu Yang Li Han Wu Zi-Yu Chen Fan Yang Houkun Liang College of Electronics and Information Engineering Sichuan UniversityChengduSichuan 610064China Key Laboratory of High Energy Density Physics and Technology(MoE) College of PhysicsSichuan UniversityChengdu 610064China. College of Physics Key Laboratory of High Energy Density Physics and Technology of the Ministry of EducationSichuan UniversityChengduSichuan 610064China

Mid-infrared(MIR)ultra-short pulses with multiple spectral-band coverage and good freedom in spectral and temporal shaping are desired by broad applications such as steering strong-field ionization,investigating bound-electron dynamics,and minimally invasive tissue ablation.However,the existing methods of light transient generation lack freedom in spectral tuning and require sophisticated apparatus for complicated phase and noise control.Here,with both numerical analysis and experimental demonstration,we report the first attempt,to the best our knowledge,at generating MIR pulses with dual-wavelength spectral shaping and exceptional freedom of tunability in both the lasing wavelength and relative spectral amplitudes,based on a relatively simple and compact apparatus compared to traditional pulse synthesizers.The proof-of-concept demonstration in steering the high-harmonic generation in a polycrystalline ZnSe plate is facilitated by dual-wavelength MIR pulses shaped in both spectral and temporal domains,spanning from 5.6 to 11.4μm,with multi-microjoule pulse energy and hundred-milliwatt average power.Multisets of harmonics corresponding to different fundamental wavelengths are simultaneously generated in the deep ultraviolet region,and both the relative strength of individual harmonics sets and the spectral shapes of harmonics are harnessed with remarkable freedom and flexibility.This work would open new possibilities in exploring femtosecond control of electron dynamics and light–matter interaction in composite molecular systems.

关键词： synthesizer harmonics apparatus

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

医院感染风险分层评估体系的建立与应用

中华医院感染学杂志 2024年第3期34卷 432-437页

作者：路宁维党晓茹梁沛枫阚天燕余淑霞许婷陈琛宁夏回族自治区人民医院感染管理科宁夏银川750001 宁夏回族自治区人民医院病案统计科宁夏银川750001 宁夏回族自治区人民医院重症监护室宁夏银川750001

目的建立医院-临床科室2个层面、高风险科室-高风险指标2个维度的医院感染风险分层评估体系并应用.方法首先采用文献调研法、头脑风暴法、风险图分析法(鱼骨图)从整体层面对临床科室进行风险识别,确定风险点、风险指标及其权重系数.根... 详细信息

目的建立医院-临床科室2个层面、高风险科室-高风险指标2个维度的医院感染风险分层评估体系并应用.方法首先采用文献调研法、头脑风暴法、风险图分析法(鱼骨图)从整体层面对临床科室进行风险识别,确定风险点、风险指标及其权重系数.根据风险的发生可能性、后果严重程度、不易探测度和当前管理体系完整性4个维度建立矩阵,进行风险分析.计算风险分值,采用百分位数法,根据不同风险分值分别从临床科室和风险指标2个维度划分不同风险组.针对风险分值最高的临床科室,由科室医院感染管理小组采用失效模式与效应分析(FMEA)开展科室的风险评估,列出高风险失效原因并制定改进方案.针对风险分值最高的风险指标,构建基于企业风险管理-整合框架(COSO-ERM)的风险管理体系.结果32个临床科室纳入风险评估范围,列出7项风险点和21项风险指标;将临床科室划分为6个风险组,ICU的风险分值最高,采用FMEA管理工具ICU共列出5个高风险失效原因,制定22个对策.将风险指标划分为4个风险组,医院感染发病率的风险分值最高,基于COSO-ERM框架构建的三级风险管理体系包括一级指标3个,二级指标16个,三级指标39个.结论本研究建立的风险分层评估体系,能科学明确和有效管理医院高风险科室、高风险指标,从而前移感染控制关口,做到精准感控.

关键词：医院感染风险评估矩阵失效模式与效应分析企业风险管理-整合框架

An incident of chloroform poisoning on a university campus

在线全文

学校读者我要写书评

暂无评论

World Journal of Emergency Medicine 2022年第2期13卷 155-157页

作者： Si-qi Cui Yi-ming Tao tian-zi Jian Jie Han Ying-li Ren Zhong-chen Zhang Ce-ce Sun Guang-cai Yu Bao-tian kan Xiang-dong Jian School of Public Health Cheeloo College of MedicineShandong UniversityJinan 250012China Department of Poisoning and Occupational Diseases Emergency MedicineQilu HospitalShandong UniversityJinan 250012China Department of Digestive Internal Medicine Qilu HospitalCheeloo College of MedicineShandong UniversityJinan 250012China Department of Geriatric Medicine Qilu HospitalCheeloo College of MedicineShandong UniversityJinan 250012China

Dear editor,University laboratory-related events include fire,explosion,chemical gas leakage,poisoning related to the loss of toxic reagents,specific pathogen infection,leakage of radioactive material,etc.[1]Chloroform is an important material used frequently in the laboratory,for organic synthesis or used as an organic glass binder and organic matter extractor.[2]As a widely used anesthetic in clinics in the 1950s and the 1960s,[3]chloroform was abandoned because of hepatorenal toxicity.We report a case of a 24-year-old suicidal female student with chloroform poisoning.

关键词： chloroform incident synthesis

Aerodynamic Analysis and Optimization of Pantograph Streamline Fairing for High-Speed Trains

在线全文

学校读者我要写书评

暂无评论

Fluid Dynamics & Materials Processing 2024年第5期20卷 1075-1091页

作者： Xiang kan Yan Li tian Li Jiye Zhang State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong UniversityChengdu610031China Technical Center Southwest Jiaotong University Chengdu Design Institute Co.Ltd.Chengdu610031China

A pantograph serves as a vital device for the collection of electricity in trains.However,its aerodynamic resistance can limit the train’s running speed.As installing fairings around the pantograph is known to effectively reduce the resistance,in this study,different fairing lengths are considered and the related aerodynamic performances of pantograph are assessed.In particular,this is accomplished through numerical simulations based on the k-ωShear Stress Transport(SST)two-equation turbulence model.The results indicate that the fairing diminishes the direct impact of high-speed airflow on the pantograph,thereby reducing its aerodynamic resistance.However,it also induces interferences in the flow field around the train,leading to variations in the aerodynamic resistance and lift of train components.It is shown that a maximum reduction of 56.52%in pantograph aerodynamic resistance and a peak decrease of 3.38%in total train aerodynamic resistance can be achieved.

关键词： Pantograph fairing train aerodynamic numerical simulation

Clinical analysis of pipeline dredging agent poisoning:A case report

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第28期10卷 10201-10207页

作者： Ya-Qian Li Guang-Cai Yu Long-Ke Shi Li-Wen Zhao Zi-Xin Wen Bao-tian kan Xiang-Dong Jian Department of Poisoning and Occupational Diseases Emergency MedicineQilu Hospital of Shandong UniversityJinan 250012Shandong ProvinceChina School of Public Health Shandong UniversityJinan 250012Shandong ProvinceChina School of Nursing and Rehabilitation Cheeloo College of MedicineShandong UniversityJinan 250012Shandong ProvinceChina

BACKGROUND Pipeline dredging agents are new household deep cleaning products used to dredge blockages in kitchen and bathroom pipeline caused by grease,hair,vegetable residue,paper cotton fibre,and other organic substances.Pipeline dredging agents are corrosive chemicals that can cause poisoning through corrosive damage to the digestive tract;however,this has not been reported clinically.Therefore,this report emphasises that oral pipeline dredging agent poisoning can cause corrosive damage to the digestive tract and may have serious health consequences.CASE SUMMARY A 68-year-old man consumed liquor(200 m L) at approximately 13:00 on April 22,2021.At approximately 16:00,his family found him unresponsive with blackened lips,blood spots in the corners of the mouth,and blood stains on the ground,as well as an empty bottle of a pipeline dredging agent.One hour later,he was admitted to the emergency department of a local hospital.Considering the empty bottle,he was suspected to have sustained severe corrosive damage to the digestive tract and was transferred to our department at 23:15 on April 22,2021.He developed dysphagia and intermittent fever and experienced difficulty in opening his mouth throughout his hospital stay.The patient’s condition gradually stabilised.However,he suddenly developed respiratory failure on day 12,and endotracheal intubation and ventilator-assisted ventilation were performed.However,the patient died after 1.5 h despite emergency rescue efforts.CONCLUSION Pipeline dredging agents are highly corrosive and may cause corrosive damage to the digestive tract and asphyxia upon consumption.

关键词： Asphyxia Digestive tract injury Pipeline dredging agent Poisoning Respiratory failure Case report

中国全球经济战略:演进历程、阶段划分及路径选择

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

江淮论坛 2022年第2期 15-25页

作者：肖宇田侃中国社会科学院亚太与全球战略研究院北京100007 中国社会科学院大学商学院北京100007

双循环战略的提出标志着中国的全球经济战略进入了新的阶段。文章在基于经济史料基础上,利用文献梳理法总结了新中国成立以来中国全球经济战略的演变路径和阶段性特征。研究发现,1978年以前,是以引进技术和设备为主的调剂余缺时代;自改... 详细信息

双循环战略的提出标志着中国的全球经济战略进入了新的阶段。文章在基于经济史料基础上,利用文献梳理法总结了新中国成立以来中国全球经济战略的演变路径和阶段性特征。研究发现,1978年以前,是以引进技术和设备为主的调剂余缺时代;自改革开放开始,中国依托生产要素成本优势切入全球分工;从90年代初期到成功加入世贸组织,中国依托加工出口逐渐成为世界工厂,但受技术和资本制约,中国在全球价值链中的“低端锁定”状态明显;2014年之后,为了应对经济发展新常态,中国通过构建更高水平开放型经济新体制,逐渐走上了引领全球化进程的新时代。在分析经济全球化历程和本质之后,文章认为新发展格局的提出,是经济全球化发展到新阶段中国的必然选择和客观需要。成功实施双循环战略,需要我们持续不断对外扩大开放,继续加强对内改革力度,不断做大贸易的朋友圈,稳步推进人民币国际化和积极参与国际规则制定。

关键词：双循环调剂余缺改革开放全球价值链高水平开放

Intravenous injection of nicardipine changed the distribution of coronary artery endothelial shear stress and fluid dynamics in patients with unstable angina

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2012年第18期125卷 3240-3245页

作者： CHEN Shao-liang HU Zuo-ying ZHANG Jun-jie kan Jing XU tian LIU Zhi-zhong XU Hai-mei Department of Cardiology Nanjing First Hospital NanjingMedical University Nanjing China Jiangsu 210006

Background Coronary endothelial shear stress （ESS） triggered the development of atherosclerosis. However, the effect of calcium channel antagonist on the distribution of ESS remained unclear. Methods Twenty consecutive patients with acute coronary syndrome （ACS） 48 hours after maximal medication with single left anterior descending artery stenosis 〈50% were studied. Nicardipine was intravenously injected at 1 μg/kg after a bolus of 10 mg in order to achieve mean blood pressure （MBP） reduced by 10% or more, or the heart rate increased by 10-15 beats/min. Hemodynamic variables and angiogram at baseline and during injection of nicardipine were recorded, respectively. Coronary artery 3-D reconstruction was used for the analysis of ESS. Results Distal reference-vessel-diameter and minimal lumen diameter decreased significantly from （2.42±0.41） mm and （1.47±0.49） mm at baseline to （2.22±0.35） mm and （1.35±0.49） mm at maximal drug-dosage （P=0.018 and 0.020, respectively）. Nicardipine did not change blood velocity. Lowest mean shear stress at segments 2-mm distal to plaque increased significantly from （0.034±0.519） Pa at baseline to （0.603±0.728） Pa （P=0.013） at peak effect of drug. Conclusions Nicardipine was associated with the constriction of diseased vessel segment that adapted to the reduction of blood pressure, without dynamic change of blood velocity at each stage of whole cardiac cycle. Increased ESS value at segments distal to plaque reflected the cardioprotection by nicardipine （ChiCTR-TRC-10000964）.

关键词： nicardipine endothelial shear stress, blood hemodynamics