检索结果-南通市图书馆

Journal of Systems Engineering and Electronics 2024年第4期35卷 906-921页

作者： HAN Yingchao MENG Weixiao fan wentao School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150001China China Mobile(Suzhou)Software Technology Company Limited Suzhou 215000China

With the continuous development of network func-tions virtualization(NFV)and software-defined networking(SDN)technologies and the explosive growth of network traffic,the requirement for computing resources in the network has risen *** to the high cost of edge computing resources,coordinating the cloud and edge computing resources to improve the utilization efficiency of edge computing resources is still a considerable *** this paper,we focus on optimiz-ing the placement of network services in cloud-edge environ-ments to maximize the *** is first proved that,in cloud-edge environments,placing one service function chain(SFC)integrally in the cloud or at the edge can improve the utilization efficiency of edge *** a virtual network function(VNF)performance-resource(P-R)function is proposed to repre-sent the relationship between the VNF instance computing per-formance and the allocated computing *** select the SFCs that are most suitable to deploy at the edge,a VNF place-ment and resource allocation model is built to configure each VNF with its particular P-R ***,a heuristic recur-sive algorithm is designed called the recursive algorithm for max edge throughput(RMET)to solve the *** simula-tions on two scenarios,it is verified that RMET can improve the utilization efficiency of edge computing resources.

关键词： cloud-edge environment virtual network function(VNF)performance-resource(P-R)function edge resource allo-cation

基于中西医临床病症特点的难治性癫痫动物模型评价与分析

在线全文

学校读者我要写书评

暂无评论

中药新药与临床药理 2024年第8期35卷 1215-1225页

作者：刘孟奇范文涛王倩陕西中医药大学陕西咸阳712056

目的基于难治性癫痫的中西医临床病症特点,对比评估现有难治性癫痫动物模型,评价模型的有效性和局限性,并探讨整合中西医理论、优化模型构建的思路,为难治性癫痫的机制阐明和防治提供新的研究方向。方法通过查阅相关文献,整理分析相关资... 详细信息

目的基于难治性癫痫的中西医临床病症特点,对比评估现有难治性癫痫动物模型,评价模型的有效性和局限性,并探讨整合中西医理论、优化模型构建的思路,为难治性癫痫的机制阐明和防治提供新的研究方向。方法通过查阅相关文献,整理分析相关资料,总结现有难治性癫痫动物模型复制方法、动物品系和模型优缺点,以难治性癫痫的西医诊断标准与中医辨证标准为依据,对现有的动物模型与临床症状的吻合度进行分析和评价。结果总结现有的难治性癫痫动物模型,发现电点燃和化学点燃是目前常用的造模方法,锂-匹罗卡品模型和海马内海人酸模型与中西医临床病症特点吻合度较高,是目前应用较广泛的动物模型。现有模型多侧重于模拟难治性癫痫的病理改变,而对于中医学所重视的先天禀赋、情志失调等因素考虑不足,因此在模拟难治性癫痫的病因复杂性、临床异质性和药物治疗反应性等方面仍存在一定局限。结论复制动物模型虽然可以在一定程度上反映其发病机制,但与机体的自然发病状态和临床表现仍然有较大差异。现有难治性癫痫动物模型多采用电刺激或化学药物诱导,在模拟癫痫持续状态、耐药性方面有一定优势,但仍存在诱导方法单一、病理改变不够复杂等局限。未来可尝试整合中医辨证分型与常规的电刺激或化学药物诱导方法,通过模拟多种致病因素,建立涵盖不同中医证型的难治性癫痫动物模型。同时,采用行为学、电生理、影像学和组织病理学等多维度指标,构建更全面的评价体系,以提高模型的临床相关性和转化应用价值。在造模过程中,可通过夹尾法、慢性束缚法、颈部带枷单笼喂养法等方式建立肝郁证模型;采用高脂饲料喂饲法建立痰凝证模型;使用夹尾+肾上腺素注射的方法建立气滞血瘀证模型;应用惊恐伤肾结合劳倦游泳建立肾虚精亏证模型等。还可通过改变光照和温度条件,模拟环境中的阴阳变化,研究环境变化对中医动物模型的影响。为难治性癫痫的治疗与研究提供更多思路。

关键词：难治性癫痫病证结合动物模型中西医临床

基于中西医病证结合特点的中风后抑郁动物模型评价分析

在线全文

学校读者我要写书评

暂无评论

中药药理与临床 2024年第2期40卷 114-118页

作者：周铭晗杨皓博范文涛陕西中医药大学咸阳712046

基于中风后抑郁(PSD)中西医临床诊断标准,总结和归纳PSD动物模型的造模方法与优缺点,并分析其与中西医临床病证特点的吻合度。发现PSD动物模型的造模方法以复合型方法为主,其中中西医临床特点吻合度最高的模型为大脑中动脉缺血再灌注(MC... 详细信息

基于中风后抑郁(PSD)中西医临床诊断标准,总结和归纳PSD动物模型的造模方法与优缺点,并分析其与中西医临床病证特点的吻合度。发现PSD动物模型的造模方法以复合型方法为主,其中中西医临床特点吻合度最高的模型为大脑中动脉缺血再灌注(MCAO)+孤养+慢性不可预见温和刺激(CUMS)法,能够部分模拟出瘀血、痰瘀互结、肝气郁结、等证候。然而当前PSD造模方法多为脑卒中和抑郁症造模方法的单纯结合,尚无一体性的PSD造模法,同时由于缺少PSD中西医临床诊断标准与模型评价标准,其造模方法仍以抑郁症诊断及模型评价标准为主,且偏向于现代医学模型,中医病证模型较少,因此在PSD中医学临床诊断及模型评价方面存在一定误差。完善PSD中西医临床诊断及模型评价标准,并且制备符合中医临床特点的PSD动物模型,对探究PSD发病机制及治疗方法有着重大的研究意义。

关键词：中风后抑郁 PSD 动物模型临床病证特点

在线全文

学校读者我要写书评

暂无评论

基于上限定理确定隧道式锚碇极限抗拔承载力

自然灾害学报 2024年第1期33卷 129-138页

作者：贺建清王津林孟源王湘春范文韬胡惠华湖南科技大学岩土工程稳定控制与健康监测省重点实验室湖南湘潭411201 湖南省交通规划勘察设计院有限公司湖南长沙410200

隧道式锚碇作为一种新型的悬索桥锚碇结构,因具有因地制宜、经济环保的优点在多山的西南地区得到了广泛应用。已有研究表明,锚塞体围岩性质较差、埋深较浅,锚塞体与围岩接触界面结合程度较好的隧道式锚碇极易发生倒楔形冲切破坏。将破... 详细信息

隧道式锚碇作为一种新型的悬索桥锚碇结构,因具有因地制宜、经济环保的优点在多山的西南地区得到了广泛应用。已有研究表明,锚塞体围岩性质较差、埋深较浅,锚塞体与围岩接触界面结合程度较好的隧道式锚碇极易发生倒楔形冲切破坏。将破坏体视为以锚塞体中心线为轴线的旋转楔形体,假定破坏面为最小旋转曲面,利用变分法经典欧拉方程求解破坏体最小旋转曲面问题,确定旋转曲面母线方程;基于改进的Mohr-Coulomb强度准则,由主缆拉拔荷载和楔形体自重所做的外功率与楔形体沿滑移面所消耗的内功率相等的条件建立虚功方程,推导隧道式锚碇极限抗拔承载力上限解。开展隧道式锚碇室内模型试验,研究了拉拔承载过程中的坡面位移的变化规律及隧道式锚碇的破坏模式。研究结果表明,拉拔作用点的荷载-位移曲线可分为4个阶段:克服重力阶段、弹性阶段、弹塑性阶段以及破坏阶段;隧道式锚碇破坏模式为围岩倒楔形冲切破坏,破坏体可近似视为以锚塞体中心线为轴线的旋转楔形体;由推导公式得到的隧道式锚碇极限抗拔承载力计算值与实测值一致性较好,具有一定的可靠性,可为隧道式锚碇的设计提供参考。

关键词：隧道式锚碇修正Mohr-Coulomb强度准则极限分析法室内模型试验

在线全文

学校读者我要写书评

暂无评论

一种基于火工品技术的数据安全保护方法研究

兵器装备工程学报 2024年第7期45卷 267-274页

作者：张强康长盛樊文韬洪应平张会新微纳器件与系统教育部重点实验室太原030051 湖北久之洋红外系统股份有限公司武汉430223

数据存储器作为飞行器参数的重要记录设备,在推动远程精确打击武器的发展进程中有重要作用。由于远程武器的射程范围广,常常导致数据存储器无法快速有效地定位回收,若数据存储器被敌人获取,将会导致数据泄露,危害国家安全。基于以上研... 详细信息

数据存储器作为飞行器参数的重要记录设备,在推动远程精确打击武器的发展进程中有重要作用。由于远程武器的射程范围广,常常导致数据存储器无法快速有效地定位回收,若数据存储器被敌人获取,将会导致数据泄露,危害国家安全。基于以上研发背景,分析了各种数据销毁方式的优缺点,设计实现了一种基于火工品技术的芯片毁伤方法,用于保护数据存储器的记录数据。测试结果表明:毁伤模块能够在无解保指令下对被恶意拆除的目标芯片进行摧毁,且毁伤模块在待机情况下能够长时间工作超过120 h。满足系统的方案设计需求。

关键词：数据存储器数据安全芯片毁伤火工品长时间工作

Influence of Xingnao Jieyu capsule on hippocampal and frontal lobe neuronal growth in a rat model of post-stroke depression

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2012年第3期7卷 187-190页

作者： wentao fan Qian Wang Yongmei Yan Shaanxi University of Chinese Medicine Xianyang 712000 Shaanxi Province China

The present study established a rat model of post-stroke depression using incomplete ischemia induced by unilateral carotid artery ligation in combination with solitary raising and subcutaneous injection of a small dose of reserpine. After intragastric perfusion with 45 mg/100 g, 15 mg/100 g, and 7.5 mg/100 g of Xingnao Jieyu for 7, 14 and 21 days, neuronal morphology in the frontal lobe and hippocampus was improved, depression state and voluntary behaviors were also effectively improved in rats with post-stroke depression. Moreover, the effects of Xingnao Jieyu at a dose of 45 and 15 mg/100 g were similar to the traditional antidepressant Prozac.

关键词： Xingnao Jieyu capsule poststroke depression hippocampus neuron traditional Chinese medicine neural regeneration

Hierarchical porous cellulose/lanthanide hybrid materials as luminescent sensor

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2018年第10期36卷 1036-1043页

作者： wentao fan Jiaojiao Du Junfeng Kou Zeyu Zhang Fengyi Liu College of Chemistry and Chemical Engineering Yunnan Normal University

Photoluminescent hybrid materials containing carboxymethyl cellulose and lanthanide ions（Eu3＋, Tb3＋）were prepared by a facile method under ambient conditions. Lanthanide ions were covalently grafted to the cellulose framework through coordination with the carboxylic groups of the cellulose. Hybrid materials were fabricated as hydrogel and aerogel. As shown by SEM and pore parameters, aerogel materials which were obtained by supercritical CO2 drying show hierarchical porous structure. The photoluminescence spectrum of the hybrid materials shows the characteristic red emission of Eu3＋ ion and green emission of Tb3＋. Further luminescent investigations reveal that these hybrid materials can detect Fe3＋ with relative selectivity and high sensitivity, which suggests that the hybrid materials could be a promising luminescent probe for selectively sensing Fe3＋ ion.

关键词： Lanthanide Cellulose Hybrid materials Luminescent sensor Rare earths

Coking kinetics and influence of reaction-regeneration on acidity, activity and deactivation of Zn/HZSM-5 catalyst during methanol aromatization

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2015年第1期24卷 108-118页

作者： Guiquan Zhang Xin Zhang Ting Bai Tengfei Chen wentao fan School of Chemical Engineering Northwest University

The coking kinetics and reaction-regeneration on Zn/HZSM-5 （Zn/HZ） catalyst in the conversion of methanol to aromatics were investigated. The highest initial benzene, toluene and xylene （BTX） yield of ca. 67.7% was obtained on fresh Zn/HZ catalyst, which showed the worst catalytic stability. The cycle of reaction-regeneration significantly modified the texture and acidity of Zn/HZ catalyst, which in turn affected its catalytic performance and coking behavior in methanol conversion to BTX. The residual carbon located on the surface of Zn/HZ catalyst led to the decrease of acid sites and the change on the acid sites distribution, which played an important roles on its activity and deactivation. It was found that the high B/L ratio and the low total acid sites concentration of the Zn/HZ catalyst favored to the high BTX yield and good catalytic stability in methanol conversion.

关键词： methanol aromatization reaction-regeneration acidity deactivation

The effects of Xingnao Jieyu capsules on post-stroke depression are similar to those of fluoxetine

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2013年第19期8卷 1765-1772页

作者： Yongmei Yan wentao fan Li Liu Ru Yang Wenjia Yang Department of Encephalopathy Affiliated Hospital of Shaanxi University of Chinese Medicine Encephalopathology Key Subject of Traditional Chinese Medicine State Administration of Traditional Chinese Medicine of the People's Republic of China Research Room of Traditional Chinese Medicine Internal Medicine Shaanxi University of Chinese Medicine

The Xingnao Jieyu capsule has been shown to effectively relieve neurologic impairments and les- sen depression. It remains poorly understood whether this capsule can be used to treat post-stroke depression. Thus, in the present study, we established a rat model of post-stroke depression using left middle cerebral artery occlusions in combination of chronic unpredictable stress and solitary housing during development. Experimental rats received intragastric perfusion with 0.82, 0.41, and 0.20 g/kg Xingnao Jieyu capsules separately dissolved in 2 mL distilled water. Fluoxetine served as a positive control. The treatment was conducted over 28 days. Sugar water consumption test, open-field test, real-time fluorescent quantitative PCR and immunohistochemical staining results demonstrated that intragastric perfusion with various doses of Xingnao Jieyu capsules increased sugar water consumption, voluntary behaviors and synaptotagmin mRNA and protein expression in rats with post-stroke depression. These therapeutic effects were similar to those of fluoxetine. These results indicate that Xingnao Jieyu capsules upregulate synaptotagmin expression in hip pocampi of rats with post-stroke depression, and exert antidepressant effects.

关键词： neural regeneration traditional Chinese medicine Xingnao Jieyu capsule stroke post-stroke de-pression synapsin neurologic impairment chronic stress depression hippocampus grants-supported paper neuroregeneration

基于北斗RDSS的船用海上定位设备关键技术研究

在线全文

学校读者我要写书评

暂无评论

舰船电子工程 2024年第3期44卷 40-45页

作者：樊文韬张强郭子裕张会新中北大学仪器科学与动态测试教育部重点实验室太原030051

针对海上船舶的定位问题,利用北斗短报文装置的位置报告功能,通过对定位、通信模块的关键技术研究和实验,设计出一整套北斗实时定位及通信系统,实现了对渔船位置的监测和对遇险渔船救援的指挥。北斗短报文设备采用了北斗二号的导航定位... 详细信息

针对海上船舶的定位问题,利用北斗短报文装置的位置报告功能,通过对定位、通信模块的关键技术研究和实验,设计出一整套北斗实时定位及通信系统,实现了对渔船位置的监测和对遇险渔船救援的指挥。北斗短报文设备采用了北斗二号的导航定位,双向短信发送和定时功能。有效地解决了通信距离远,通讯费用高等问题。该系统具有实时性强,通讯频率高,定位精度高,实用性强,传输功率大等优点。

关键词：北斗卫星短报文定位系统船用收发