检索结果-南通市图书馆

Pentamidine in Pneumocystis jirovecii prophylaxis in heart transplant recipients

World Journal of Transplantation 2016年第1期6卷 193-198页

作者： Adem Ilkay Diken Ozlem Er?en Diken Onur Hanedan Seyhan Y?lmaz Ata Niyazi Ecevit Emir Erol adnan yal??nkaya Department of Cardiovascular Surgery Hitit University Faculty of Medicine Department of Chest Diseases Hitit University Faculty of Medicine Department of Cardiovascular Surgery Turkiye Yuksek Ihtisas Hospital

Despite advances in transplantation techniques and the quality of post-transplantation care, opportunistic infections remain an important cause of complications. Pneumocystis jirovecii(P. jirovecii) is an opportunistic organism, represents an important cause of infections in heart transplantation patients. Almost 2% to 10% of patients undergoing cardiac transplantation have Pneumocystis pneumonia. Prophylaxis is essential after surgery. Various prophylaxis regimes had been defined in past and have different advantages. Trimethoprim/sulfamethoxazole(TMP/SMX) has a key role in prophylaxis against P. jirovecii. Generally, although TMP/SMX is well tolerated, serious side effects have also been reported during its use. Pentamidine is an alternative prophylaxis agent when TMP/SMX cannot be tolerated by the patient. Structurally, pentamidine is an aromatic diamidine compound with antiprotozoal activity. Since it is not effectively absorbed from the gastrointestinal tract, it is frequently administered via the intravenous route. Pentamidine can alternatively be administered through inhalation at a monthly dose in heart transplant recipients. Although, the efficiency and safety of this drug is well studied in other types of solid organ transplantations, there are only few data about pentamidine usage in heart transplantation. We sought to evaluate evidence-based assessment of the use of pentamidine against P. jirovecii after heart transplantation.

关键词： Pentamidine Prophylaxis Trimethoprim Heart transplantation Pneumocystis pneumonia Pneumocystis jirovecii Pneumocystis carinii

来源：

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

Seismic attribute and well-log analysis for channel characterization in the upper San Andres and Grayburg formations of the Midland Basin,Texas

Energy Geoscience

引用

Energy Geoscience 2024年第2期5卷 263-278页

作者： Sumit Verma Esra yalçın Yılmaz Laura Ortiz Sanguino Justin Yandell Miles A.Henderson Robert C.Trentham Department of Geosciences The University of Texas Permian BasinOdessaTXUSA School of Geosciences The University of OklahomaNormanOKUSA

The Permian Basin is one of the most prolific,and currently one of the most active,oil and gas basins in the *** Lower Permian strata in the Permian Basin have produced more than 14 billion barrels of oil(BBO),making it the largest volume of hydrocarbon in the *** in the Midland Basin during late Leonardian through early Guadalupian(ca.272-269 Ma)resulted in progradation of shelf edge and ultimately closure of the basin by Middle Permian *** analyzed a merged seismic survey covering parts of the Permian Basin(i.e.,Central Basin Platform and Midland Basin)in Andrews,Ector,and Midland Counties,*** seismic survey and well logs show the presence of gently dipping(ca.1°)clinoforms in the Upper San Andres and Grayburg Formations on the eastern edge of the Central Basin Platform and western Midland *** seismic attributes,curvature,and spectral decomposition identify low sinuosity slope channels oriented north-south,but such channels do not appear beyond the *** shelf edge shifts from north to south during deposition of the Upper San Andres and Grayburg *** identify five basinward shifts noted by the migration of the shelf edge toward the basin center and the presence of channel features along the depositional *** petrophysical analysis indicates that channels cut into carbonate rocks and are filled by siliciclastic sediments;this interpretation is supported by the most negative curvature anomalies along the channel axes caused by the differential compaction between the carbonate and siliciclastic *** are a few channels with a northwest-southeast strike,which matches the direction of the Concho Lineament observed by satellite *** observations are consistent with previous interpretations of the northern Midland Basin closure during Middle-Late Permian time.

关键词： Permian shelf carbonate

来源：

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

Logical Image Acquisition and Analysis of Android Smartphones

引用

Journal of Computer and Communications 2024年第4期12卷 139-152页

作者： Nursel yalçın Tayfun Yıldırım Department of Computer and Instructional Technologies Education Faculty of Education Gazi University Ankara T&#252rkiye Department of Computer Forensics Institute of Informatics Gazi University Ankara T&#252rkiye

Android smartphones largely dominate the smartphone market. For this reason, it is very important to examine these smartphones in terms of digital forensics since they are often used as evidence in trials. It is possible to acquire a physical or logical image of these devices. Acquiring physical and logical images has advantages and disadvantages compared to each other. Creating the logical image is done at the file system level. Analysis can be made on this logical image. Both logical image acquisition and analysis of the image can be done by software tools. In this study, the differences between logical image and physical image acquisition in Android smartphones, their advantages and disadvantages compared to each other, the difficulties that may be encountered in obtaining physical images, which type of image contributes to obtaining more useful and effective data, which one should be preferred for different conditions, and the benefits of having root authority are discussed. The practice of getting the logical image of the Android smartphones and making an analysis on the image is also included. Although root privileges are not required for logical image acquisition, it has been observed that very limited data will be obtained with the logical image created without root privileges. Nevertheless, logical image acquisition has advantages too against physical image acquisition.

关键词： Android Smartphone Forensics Data Acquisition Data Analysis Root Privileges Digital Forensics

来源：

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

Soliton solutions for time fractional ocean engineering models with Beta derivative

引用

Journal of Ocean Engineering and Science 2022年第5期7卷 444-448页

作者： Ibrahim yalçınkaya Hijaz Ahmad Orkun Tasbozan Ali Kurt Department of Mathematics and Computer Sciences Faculty of ScienceNecmettin Erbakan UniversityKonyaTurkey Department of Basic Sciences University of Engineering and TechnologyPeshawarPakistan Department of Mathematics Faculty of Science and LiteratureHatay Mustafa Kemal UniversityHatayTurkey Department of Mathematics Faculty of Science and LiteraturePamukkale UniversityDenizliTurkey

In this study,the authors obtained the soliton and periodic wave solutions for time fractional symmetric regularized long wave equation(SRLW)and Ostrovsky equation(OE)both arising as a model in ocean *** this aim modified extended tanh-function(mETF)is *** using this method,chain rule is employed to turn fractional nonlinear partial differential equation into the nonlinear ordinary differential equation in integer *** to the chain rule,there is no further requirement for any normalization or *** derivative which involves fractional term is used in considered mathematical *** the exact solutions of these equations is very important for knowing the wave behavior in ocean engineering models.

关键词： Symmetric regularized long wave equation Beta derivative Ostrovsky equation Analytical solution Soliton solutions Periodic wave solution

来源：

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

Effect of Porosity on the Mechanical Properties and Wear Performance of 2% Copper Reinforced Sintered Steel Used in Shock Absorber Piston Production

引用

Journal of Materials Science & Technology 2009年第5期25卷 577-582页

作者： Bekir yalin Technical Education Faculty Suleyman Demirel University

Powder metallurgy （P/M） method has mainly been used to produce automobile parts such as self-lubrication beds, shock absorber parts, and gear wheels. In order to investigate the effect of porosity on the mechanical and tribological properties in sintered steel, specimens with 10%, 15%, and 20% porosity were produced in a 10 mm×10 mm×55 mm prismatic shape by pre-alloying powders of the MPIF Fe-C-0.205 alloy used in the production of shock absorber pistons. Sintering was carried out at 900℃ for 45 min in an argon atmosphere. Tensile, charpy, and microhardness tests were performed on these specimens. In addition, the wear performance of a 2% Cu reinforced sintered steel alloy under dry sliding conditions was determined. Metallographic studies such as pore formation, worn surface, and fractured surface analyses were performed by scanning electron microscopy and optical microscopy. The results indicate that irregular pore formation tendencies increase with an increase in porosity （%）. Furthermore, an increase in porosity was shown to decrease the mechanical properties and increase the wear trace area and the friction coefficient of sintered steel.

关键词： Shock absorber piston Powder metallurgy Porosity Friction coefficient

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

考虑零售商竞争的闭环供应链产品担保决策及协调

引用

数学的实践与认识 2024年第1期54卷 80-89页

作者：薛静雅孟丽君夏虹影黄祖庆中国计量大学经济与管理学院浙江杭州310018 广州大学管理学院广东广州510006

针对由一个制造商和两个竞争型零售商组成的闭环供应链,研究零售商竞争下产品担保决策及供应链协调问题.分别建立两零售商均不提供担保(无担保)、仅一零售商提供担保(单边担保)和两零售商均提供担保(双边担保)决策模型,研究零售商是否... 详细信息

针对由一个制造商和两个竞争型零售商组成的闭环供应链,研究零售商竞争下产品担保决策及供应链协调问题.分别建立两零售商均不提供担保(无担保)、仅一零售商提供担保(单边担保)和两零售商均提供担保(双边担保)决策模型,研究零售商是否应当提供产品担保服务问题,分析零售商担保决策对最优结果的影响,并与仅一零售商的闭环供应链进行对比.结果表明:制造商倾向于利用多零售渠道分销产品;存在零售商竞争时,两零售商均选择提供产品担保以最大化自身利润;但在“担保水平”维度,两零售商无需进行差异化竞争;双边担保使得消费者获得“高价+高水平担保”产品服务,刺激市场需求,实现“零售商+制造商”双赢,进而提升供应链整体绩效.最后,设计了一成本分担-收益共享契约来协调两零售商均提供担保下的供应链运作,结果证明该契约能有效实现制造商和零售商的帕累托改进.

关键词：闭环供应链产品担保竞争型零售商成本分担-收益共享契约

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

地方本科高校人工智能专业建设探索——以广东理工学院为例

引用

大学（研究与管理） 2024年第3期 10-13页

作者：何晓昀邵亚丽广东理工学院信息技术学院广东肇庆526100

我国人工智能专业人才供给严重不足,目前人工智能高端人才主要在“985”“211”类高校培养,人工智能产业所需要的数量庞大技术人才需要靠中国高等教育体系中占主体地位的地方院校来培养。广东理工学院在大量调研的基础上,根据学校的办... 详细信息

我国人工智能专业人才供给严重不足,目前人工智能高端人才主要在“985”“211”类高校培养,人工智能产业所需要的数量庞大技术人才需要靠中国高等教育体系中占主体地位的地方院校来培养。广东理工学院在大量调研的基础上,根据学校的办学方向和办学定位制订合适的专业人才培养目标和人才培养方案,组建有丰富教学管理经验和科研经验的中青年教师团队,整合校内、校外的实验实训资源完成实践教学平台建设,在建设人工智能专业上的经验可为同类型地方本科院校提供参考。

关键词：地方本科院校人工智能专业建设

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Meshless Method with Domain Decomposition for Submerged Porous Breakwaters in Waves

引用

Journal of Ocean University of China 2021年第6期20卷 1325-1340页

作者： CHIOUKH Nadji YÜKSEL yalçın Department of Hydraulics University of Sidi Bel-AbbesSidi Bel-Abbes 22000Algeria Laboratory of Civil Engineering and Environment University of Sidi Bel-AbbesSidi Bel-Abbes 22000Algeria Laboratory of Hydraulics and Coastal Engineering Yildiz Technical UniversityEsenler-Istanbul 34220Turkey

Based on the improved version of the meshless singular boundary method(ISBM)in multi domain(MD),a numerical method is proposed in this paper to study the interaction of submerged permeable breakwaters and regular waves at normal *** account for fluid flow inside the porous breakwaters,the conventional model of Sollitt and Cross for porous media is *** single and dual trapezoidal breakwaters are *** physical problem is formulated in the context of the linear potential wave *** domain decomposition method(DDM)is employed,in which the full computational domain is decomposed into separate domains,that is,the fluid domain and the domains of the ***,appropriate mixed type boundary and continuity conditions are applied for each subdomain and at the interfaces between *** solution is approximated in each subdomain by the *** discretized algebraic equations are combined,resulting in an overdetermined full system that is solved using a least-square solution *** numerical results are presented in terms of the hydrodynamic quantities of reflection,transmission,and wave-energy *** relevance of the results of the present numerical procedure is first validated against data of previous studies,and then selected computations are discussed for various structural *** proposed method is demonstrated to be highly accurate and computationally efficient.

关键词： meshless method domain decomposition regular waves breakwaters porosity reflection transmission dissipation coastal environment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Water quality and sediment contamination assessment of Pazarsuyu Stream, Turkey using multivariate statistical methods and pollution indicators

引用

International Soil and Water Conservation Research 2019年第1期7卷 47-56页

作者： Fikret Ustao(g)lu yal(c)in Tepe Biology Department Faculty of Arts and Science Giresun UniversityGure28200 GiresunTurkey

The spatio-temporal variations of surface water quality and the level of metal contamination in the sediment of Pazarsuyu Stream were determined by using multivariate statistical techniques and pollution indicators,*** water and sediment samples were collected monthly from four different stations along the Pazarsuyu Stream between June 2014 and May 2015 and analyzed using standard *** were assessed according to national and international water quality criteria and the water quality parameters in some stations were found to be over these criteria *** present study showed that statistical techniques such as Pearson Correlation Index (PCI),Principal Component Analysis (PCA),Cluster Analysis (CA),One Way ANOVA need to be used to get better information for the studies on the water quality of surface *** identified six factors accounting for 82.88% of the total variation in the *** abundance of sediment heavy metals was in the order of Fe > Mn > Zn > Pb > Cu> Cr > Co > *** heavy metal contamination in the sediments was evaluated by applying the enrichment factor (EF),contamination factor (CF),geoaccumulation index (lgeo) and potential ecological risk index (PERI).Pb was heavily contaminated and has a significant enrichment of contamination according to calculated EF ***,the stream water can be used for irrigation with precaution but extensive treatment required before using for domestic purposes to prevent adverse public health effects.

关键词： Pazarsuyu Stream Water quality Multivariate statistical techniques sediment Heavy metals Pollution indicators

来源：

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

Meshless Method for Analysis of Permeable Breakwaters in the Proximity of A Vertical Wall

引用

China Ocean Engineering 2019年第2期33卷 148-159页

作者： Nadji CHIOUKH Karim OUAZZANE yal??n YüKSEL Benameur HAMOUDI Esin ?EVIK Department of Hydraulics University Djillali Liabes of Sidi Bel-Abbes Laboratory of Naval Aero-Hydrodynamics USTO MB Faculty of Life Sciences and Computing London Metropolitan University Laboratory of Hydraulics and Coastal Engineering Yildiz Technical University

In the present work, the improved version of the meshless singular boundary method(ISBM) is developed for analyzing the performance of bottom standing submerged permeable breakwaters in regular normally incident waves and in the proximity of a vertical wall. Both single and dual prismatic breakwaters of rectangular and trapezoidal forms are examined. The physical problem is cast in terms of the Laplace equation governing an irrotational flow and incompressible fluid motion with appropriate mixed type boundary conditions, and solved numerically using the ISBM. To model the permeability of the breakwaters fully absorbing boundary conditions are assumed. Numerical results are presented in terms of hydrodynamic quantities of the reflection coefficients. These are firstly validated against the results of a multi-domain boundary element method(BEM) developed independently for a previous study. The agreement between the results of the two methods is excellent. The coefficients of reflection are then computed and discussed for a variety of structural conditions including the breakwaters height, width, spacing, and absorbing permeability. Effects of the proximity of the vertical plane wall are also investigated. The breakwater's width is found to have only marginal effects compared with its height. Permeability tends to decrease the minimum reflections. These coefficients show periodic variations with the spacing relative to the wavelength. Trapezoidal breakwaters are found to be more cost-effective than the rectangular breakwaters. Dual breakwater systems are confirmed to perform much better than single structures.

关键词： meshless improved singular boundary method regular normal waves rectangular and trapezoidal breakwaters permeability vertical wall reflection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：