检索结果-南通市图书馆

同方期刊数据库

Car-following theory of steady-state traffic flow using time-to-collision

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第8期12卷 645-654页

作者： Sheng jin Zhi-yi HUANG Peng-fei TAO Dian-hai wang College of Civil Engineering and Architecture Zhejiang University Hangzhou 310058 China College of Traffic and Transportation Jilin University Changchun 130022 China

The conventional car-following theory is based on the assumption that vehicles will travel along the center line of lanes. However, according to the field survey data, in complex traffic conditions, a lateral separation between the leader and the follower frequently occurs. Accordingly, by taking lateral separation into account, we redefined the equation of time-to-collision (TTC) using visual angle information. Based on the stimulus-response framework, TTC was introduced into the basic General Motors (GM) model as a stimulus, and a non-lane-based car-following model of steady-state traffic flow was developed. The property of flow-density relationship was further investigated after integrating the proposed car-following model with different parameters. The results imply that the property of steady-state traffic flow and the capacity of each lane are highly relevant to the microscopic staggered car-following behavior, and the proposed model significantly enhances the practicality of the human driving behavior model.

关键词： Non-lane-based Visual angle Time-to-collision(TTC) Flow-density curve

Treatment of multisystem inflammatory syndrome in children

在线全文

学校读者我要写书评

暂无评论

World Journal of Pediatrics 2024年第4期20卷 325-339页

作者： Tong Tong yi-Hua jin Min wang Fang-Qi Gong Department of Cardiology Children's HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthNo.3333 Binsheng RoadHangzhou 310052China

Background Multisystem inflammatory syndrome in children(MIS-C),a relatively uncommon but severe pediatric complication,is associated with coronavirus disease 2019(COVID-19).A variety of treatment approaches,including intravenous immunoglobulins(IVIGs),glucocorticoids(GCs)and biologic agents,such as anakinra and infliximab,have been described for the management of COVID-19-related *** therapy is also ***,a well-developed treatment system has not been established,and many issues remain *** recently published articles related to the treatment of MIS-C have been ***,in this review,we identified relevant articles published recently and summarized the treatment of MIS-C more comprehensively and *** sources We reviewed the literature on the treatment of MIS-C through 20 September *** PubMed/Medline,Web of Science,EMBASE,and Cochrane Library databases were searched with the combination of the terms"multisystem inflammatory syndrome","MIS-C","PIMS-TS","therapy","treatment","drug","IVIG","GCs","intravenous immunoglobulin","corticosteroids","biological agent",and"aspirin".Results The severity of MIS-C varies,and different treatment schemes should be used according to the specific *** research and data collection are vital to better understand the pathophysiology and optimal management of *** MIS-Cis a disease involving multiple systems and has great *** the accumulation of additional experience,we have garnered fresh insights into its treatment ***,there remains a critical need for greater standardization in treatment protocols,alongside the pressing necessity for more robust and meticulously conducted studies to deepen our understanding of these protocols.

关键词： Coronavirus disease 2019-Corticosteroids Intravenous immunoglobulin Multisystem inflammatory syndrome in children-Treatment

Intestinal histoplasmosis in immunocompetent adults

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 Gastroenterology 2016年第15期22卷 4027-4033页

作者： Lin-Lin Zhu jin wang Zi-jing wang yi-Ping wang jin-Lin Yang Department of Gastroenterology West China Hospital of Sichuan University Gastroenterology Kanazawa University Graduate School of Medical Science

AIM: To present a retrospective analysis of clinical and endoscopic features of 4 cases of immunocompetent hosts with intestinal histoplasmosis(IH).METHODS: Four immunocompetent adults were diagnosed with IH between October 2005 and March 2015 at West China Hospital of Sichuan University. Clinical and endoscopic characteristics were summarized and analyzed retrospectively. GMS(Gomori methenamine silver), PAS(periodic acid-Schiff) and Giemsa staining technique were used to confirm Histoplasma capsulatum(H. capsulatum). The symptoms, signs, endoscopic presentations, radiographic imaging, pathological stain results and follow-up are presented as tables and ***: The cases were male patients, ranging from 33 to 61 years old, and primarily presented with nonspecific symptoms such as irregular fever, weight loss, abdominal pain and distention. Hepatosplenomegaly and lymphadenopathy were the most common signs. Endoscopic manifestations were localized or diffuse congestion, edema, ulcers, and polypoid nodules with central erosion involving the terminal ileum, ascendingcolon, transverse colon, descending colon, sigmoid colon and rectum, similar to intestinal tuberculosis, tumor, and inflammatory bowel disease. Numerous yeast-like pathogens testing positive for PAS and GMS stains but negative for Giemsa were detected in the cytoplasm of the histiocytes, which were highly suggestive of H. ***: Immunocompetent individuals suffering from histoplasmosis are rarely reported. It is necessary that gastroenterologists and endoscopists consider histoplasmosis as a differential diagnosis, even in immunocompetent patients.

关键词： Intestinal histoplasmosis Disseminated histoplasmosis Immunocompetence Endoscopic characteristics Differential diagnosis

存储式阵列感应测井仪数据处理方法研究与实现

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

石油管材与仪器 2016年第5期2卷 10-14页

作者：尹国平游畅刘赟潘勇金建勋汪益王孝忠川庆钻探工程有限公司测井公司重庆400021

简述了传统感应测井仪在数据处理上的局限性,提出了存储式阵列感应测井仪数据处理方法,并简单介绍了存储式阵列感应测井仪工作原理和响应特性。数据处理是存储式阵列感应测井仪的核心之一,该仪器利用多个不同间距的子阵列和多个工作频... 详细信息

简述了传统感应测井仪在数据处理上的局限性,提出了存储式阵列感应测井仪数据处理方法,并简单介绍了存储式阵列感应测井仪工作原理和响应特性。数据处理是存储式阵列感应测井仪的核心之一,该仪器利用多个不同间距的子阵列和多个工作频率采集井下丰富的地层信息,送入地面系统进行数据处理,可聚焦出不同分辨率和不同探测深度的测井曲线。数据存储和坏区管理是该仪器另一核心技术,用于对测井原始数据的管理。实际应用表明,该仪器能准确地测量地层电阻率,真实反应地质构造,数据处理方法先进。

关键词：存储式测井感应测井趋肤效应软件聚焦坏区管理

Unique Continuation Property with Partial Information for Two-Dimensional Anisotropic Elasticity Systems

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2020年第1期36卷 3-17页

作者： jin CHENG yi-kan LIU Yan-bo wang Masahiro YAMAMOTO School of Mathematical Sciences Fudan UniversityShanghai 200433China School of Mathematics Shanghai University of Finance and EconomicsShanghai 200433China Research Institute for Electronic Science Hokkaido UniversitySapporo 060-0812Japan Graduate School of Mathematical Sciences The University of TokyoTokyo 153-8914Japan Academy of Romanian Scientists 54 Splaiul Independentei StreetBucharest 050094Romania Peoples’Friendship University of Russia(RUDN University Moscow 117198Russia

In this paper,we establish a novel unique continuation property for two-dimensional anisotropic elasticity systems with partial *** precisely,given a homogeneous elasticity system in a connected open bounded domain,we investigate the unique continuation by assuming only the vanishing of one component of the solution in a *** the corresponding Riemann function,we prove that the solution vanishes in the whole domain provided that the other component vanishes at one point up to its second ***,we construct several examples showing the possibility of further reducing the additional information of the other *** result possesses remarkable significance in both theoretical and practical aspects because the required data are almost halved for the unique determination of the whole solution.

关键词： anisotropic elasticity system unique continuation,Riemann function

Recent progresses in the suppression method based on the growth mechanism of lithium dendrite

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2018年第2期27卷 513-527页

作者： Xiaolong Xu Suijun wang Hao wang Chen Hu yi jin jingbing Liu Hui Yan The College of Materials Science and Engineering Beijing University of Technology State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute

Lithium secondary batteries（LSBs） with high energy densities need to be further developed for future applications in portable electronic devices, electric vehicles, hybrid electric vehicles and smart grids. Lithium metal is the most promising electrode for next-generation rechargeable batteries. However, the formation of lithium dendrite on the anode surface leads to serious safety concerns and low coulombic ***, researchers have made great efforts and significant progresses to solve these problems. Here we review the growth mechanism and suppression method of lithium dendrite for LSBs’ anode protection. We also establish the relationship between the growth mechanism and suppression method. The research direction for building better LSBs is given by comparing the advantages and disadvantages of these methods based on the growth mechanism.

关键词： Lithium dendrite Growth mechanism Suppression method Lithium secondary battery

在线全文

学校读者我要写书评

暂无评论

规范会计理论与实证会计理论哲学比较

吉林省经济管理干部学院学报 2001年第1期15卷 46-47页

作者：党金栋王一中中国矿业大学管理学院江苏徐州221008

规范会计理论以会计假设为逻辑起点，经过严密的逻辑推理形成一套关于会计“应该是什么”的知识体系。实证会计理论从实际会计行为出发，应用“成本──效益”原则建立各种会计模型。规范会计理论的前提缺乏可验证性，只能视为科学“... 详细信息

规范会计理论以会计假设为逻辑起点，经过严密的逻辑推理形成一套关于会计“应该是什么”的知识体系。实证会计理论从实际会计行为出发，应用“成本──效益”原则建立各种会计模型。规范会计理论的前提缺乏可验证性，只能视为科学“假说”，而实证会计理论应用科学方法进行个案研究验证，结论往往受到资料的真实性、代表性和选择资料的倾向性影响，即使正确，也难以形成理论体系。

关键词：规范会计理论实证会计理论对比研究会计假设

在线全文

学校读者我要写书评

暂无评论

头针治疗偏瘫患者肘关节功能障碍的研究

武警医学 2003年第10期14卷 592-594页

作者：朱敏金益王东川武警江苏总队南京医院内一科南京210028 武警江苏总队苏州支队卫生队苏州215005 武警四川总队后勤部卫生处成都610015

目的　研究头针治疗肘关节功能障碍的临床观察 ,探讨头针的机制 ,使之更好地应用于临床。方法　观察肌张力增高的甲类和肌张力降低的乙类的肘关节屈肌与伸肌的肌力和关节功能 ,比较两类对照组和治疗组的疗效以及两类治疗组的即刻效应与... 详细信息

目的　研究头针治疗肘关节功能障碍的临床观察 ,探讨头针的机制 ,使之更好地应用于临床。方法　观察肌张力增高的甲类和肌张力降低的乙类的肘关节屈肌与伸肌的肌力和关节功能 ,比较两类对照组和治疗组的疗效以及两类治疗组的即刻效应与长期效应。结果　 (1)在治疗组和对照组的长期效应观察中 ,两者差异有显著性意义 (P 0 0 5 )。 (3)两类治疗的长期效应中 ,针刺对屈肌与伸肌在肌力与关节功能两方面的疗效差异有显著性意义 (P <0 0 1)。 (4)肘关节功能恢复的同时 ,甲类治疗组出现肌张力降低 ,乙类治疗组出现肌张力增高。

关键词：头针偏瘫肘关节功能障碍临床研究肌力作用机制中风后遗症

Heterogeneous engineering of MnSe@NC@ReS_(2) core-shell nanowires for advanced sodium-/potassium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第8期43卷 3713-3723页

作者： Sheng-Jun Lu jin-yi Lin Cai-Hong wang Yu-Fei Zhang yi Zhang Hao-Sen Fan College of Materials Science and Metallurgy Engineering Guizhou University Guiyang 550025China School of Energy Science and Engineering Nanjing Tech UniversityNanjing 211816China School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China

Sodium-ion batteries(SIBs) and potassium-ion batteries(PIBs) have been attracting great attentions and widely been exploited due to the abundant sodium/potassium ***,the preparation of high-powered anode materials for SIBs/PIBs plays a decisive role for the commercial applications of SIBs/PIBs in the *** selenides are a class of potential anode materials for SIBs/PIBs because of their small band gap and high electrical *** this work,MnSe and ReS_(2) core-shell nanowires connecting by polydopamine derived carbon nanotube(MnSe@NC@ReS_(2)) have been successfully synthesized from growing ReS_(2) nanosheets array on the surface of MnSe@NC nano wires,which present excellent Na^(+)/K^(+) storage *** applied as SIBs anode,the specific capacity of 300 mAh·g^(-1) was maintwined after 400 cycles at the current density of 1.0 A·g^(-1).Besides,it could also keep 120 mAh·g^(-1) specific capacity after 900 cycles at 1.0 A·g^(-1) for the anode of *** heterogeneous engineering and one-dimensional-two-dimensional(1D-2D) hybrid strategies could provide an ideal strategy for the synthesis of new hetero-structured anode materials with outstanding battery performance for SIBs and PIBs.

关键词： Heterogeneous engineering Core-shell nanowires MnSe@NC@ReS_(2)nanowires Na^(+)batteries K^(+)batteries