检索结果-南通市图书馆

Novel Methodologies for Preventing Crack Propagation in Steel Gas Pipelines Considering the Temperature Effect

Structural Durability & Health Monitoring 2025年第1期19卷 1-23页

作者： Nurlan Zhangabay Ulzhan Ibraimova Marco Bonopera Ulanbator Suleimenov Konstantin Avramov Maryna Chernobryvko Aigerim Yessengali department of architecture and Urban Planning Mukhtar Auezov South Kazakhstan UniversityShymkent160012Kazakhstan department of Industrial Civil and Road Construction Mukhtar Auezov South Kazakhstan UniversityShymkent160012Kazakhstan Mechanics Sound&Vibration LaboratoryDepartment of Civil EngineeringCollege of EngineeringNational Taiwan UniversityTaipei10617Taiwan department of Reability&Dynamic Strength A.Pidhornyi Institute of Mechanical Engineering Problems of National Academy of Sciences of UkraineKharkiv61046Ukraine

Using the software ANSYS-19.2/Explicit Dynamics,this study performedﬁnite-element modeling of the large-diameter steel pipeline cross-section for the Beineu-Bozoy-Shymkent gas pipeline with a non-through straight crack,strengthened by steel wire *** effects of the thread tensile force of the steel winding in the form of single rings at the crack edges and the wires with different winding diameters and pitches were also *** results showed that the strengthening was preferably executed at a minimum value of the thread tensile force,which was 6.4%more effective than that at its maximum *** analysis of the inﬂuence of the winding dia-meters showed that the equivalent stresses increased by 32%from the beginning of the crack growth until the wire *** increment in winding diameter decelerated the disclosure of the edge crack and reduced its length by 8.2%.The analysis of the inﬂuence of the winding pitch showed that decreasing the distance between the winding turns also led to a 33.6%reduction in the length of the straight crack and a 7.9%reduction in the maximum stres-ses on the strengthened pipeline *** analysis of the temperature effect on the pipeline material,within a range from-40℃ to+50℃,resulted in a crack length change of up to 5.8%.As the temperature dropped,the crack length *** such a temperature range,the maximum stresses were observed along the cen-tral area of the crack,which were equal to 413 MPa at+50℃ and 440 MPa at-40℃.The results also showed that the presence of the steel winding in the pipeline signiﬁcantly reduced the length of crack propagation up to 8.4 times,depending on the temperature effect and design parameters of *** work integrated the existing methods for crack localization along steel gas pipelines.

关键词： Crack propagation ﬁnite-element internal pressure prestressing steel gas pipeline temperature effect

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

CASE STUDY AND SUSTAINABILITY ASSESSMENT OF Bo01,MALMÖ,SWEDEN

引用

Journal of Green Building 2013年第3期8卷 34-50页

作者： Gary Austin University of Idaho Department of Landscape Architecture

INTRODUCTION The Bo01 high-density mixed-use development in Malmö,Sweden,was based on innovative planning procedures and products.A very broad definition of sustainability required new approaches in collaboration by the city,developers,planners,and *** outcomes of the project included outstanding aesthetics in the plan and the individual elements,as well as spaces that foster social interactions at the city,neighborhood,and block scales.A density of 26 residential dwelling units per gross acre balances the 50%open space *** planning for energy,water,and waste systems resulted in significant improvements,especially in energy production(100%is from renewable sources)and solid waste management.A wind turbine provides most of the electricity while a district-wide system supplied by a geothermal storage network provides almost all of the heating and cooling resources.

关键词： Bo01 sustainable development mixed-use urban housing Malmö brownfield development

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

Structural form-finding of bending components in buildings by using parametric tools and principal stress lines

引用

Frontiers of Architectural Research 2022年第3期11卷 561-573页

作者： Zhenya Yu Hang Dai Ziying Shi department of landscape architecture School of ArchitectureSoutheast UniversityNanjing 210096China

This paper aims to provide an efficient and straightforward structural form-finding method for designers to extrapolate component forms during the conceptual *** core idea is to optimize the classical method of structural form-finding based on principal stress lines by using parametric *** traditional operating process of this method relies excessively on the designer’s engineering experience and lacks ***,the current optimization work for this method is overly complicated for architects,and limitations in component type and final result ***,to facilitate an architect’s conceptual work,the optimization metrics of the method in this paper are set as simplicity,practicality,freedom,and rapid *** that reason,this paper optimizes the method from three aspects:modeling strategy for continuum structures,classification processing of data by using the k-nearest neighbor algorithm,and topological form-finding process based on stress ***,it allows architects to create structural texture with formal aesthetics and modify it in real time on the basis of structural analysis *** paper also explores a comprehensive application strategy with internal force analysis diagramming to *** finite element analysis tool Karamba3D verifies the structural performance of the form-finding *** performance is compared with that of the conventional form,and the comparison results show the practicality and potential of the strategy in this paper.

关键词： Parametric design Structural formfinding Principal stress lines Classification algorithm KNN Internal force analysis Bending components

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

Chilling stress drives organ-specific transcriptional cascades and dampens diurnal oscillation in tomato

引用

horticulture Research 2023年第8期10卷 241-253页

作者： Tina Agarwal Xiaojin Wang Frederick Mildenhall Iskander MIbrahim Sujith Puthiyaveetil Kranthi Varala department of horticulture and landscape architecture Purdue UniversityWest LafayetteIN 47907USA Purdue Center for Plant Biology Purdue UniversityWest LafayetteIN 47907USA department of Biochemistry Purdue UniversityWest LafayetteIN 47907USA

Improving chilling tolerance in cold-sensitive crops,***,requires knowledge of the early molecular response to low temperature in these under-studied *** elucidate early responding processes and regulators,we captured the transcriptional response at 30 minutes and 3 hours in the shoots and at 3 hours in the roots of tomato post-chilling from 24℃ to 4℃.We used a pre-treatment control and a concurrent ambient temperature control to reveal that majority of the differential expression between cold and ambient conditions is due to severely compressed oscillation of a large set of diurnally regulated genes in both the shoots and *** compression happens within 30 minutes of chilling,lasts for the duration of cold treatment,and is relieved within 3 hours of return to ambient *** study also shows that the canonical ICE1/CAMTA-to-CBF cold response pathway is active in the shoots,but not in the *** stress induces synthesis of known cryoprotectants(trehalose and polyamines),in a CBF-independent manner,and induction of multiple genes encoding proteins of photosystems I and *** study provides nuanced insights into the organ-specific response in a chilling sensitive plant,as well as the genes influenced by an interaction of chilling response and the circadian clock.

关键词： oscillation roots ambient

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

DESIGN AND PERFORMANCE OF BIORETENTION BEDS FOR REMOVAL OF STORMWATER CONTAMINANTS

引用

Journal of Green Building 2012年第1期7卷 17-27页

作者： Gary Austin department of landscape architecture at the University of Idaho

Bioretention basins hold a volume of water that is filtered through sandy soil and allowed to infiltrate into the subsoil or drained to an outlet(Figure 1).Originally,bioretention basins were intended as a site-scale tool to improve the quality of urban stormwater runoff,but they have a demonstrated impact on reduction of runoff volume and time of ***,the design of basins are complicated by a range of possible *** groundwater,improving runoff water quality to maintain or restore aquatic ecosystem health,reducing peak storm flows,extending time of concentration,and reducing runoff volume to prevent channel erosion and sedimentation are all possible goal *** a few states have guidelines or regulations for bioretention ***,some existing state design requirements do not reflect the range of goals or the research demonstrating the design and performance of bioretention *** example,the Idaho department of Environmental Quality recommendations were published in 2005 but based information from 1993(IDEQ,2005).The first section below considers the original purpose-pollutant removal.

关键词： rain garden bioretention stormwater treatment water quality infiltration bed

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

Predicting the impacts of climate change on nonpoint source pollutant loads from agricultural small watershed using artificial neural network

引用

Journal of Environmental Sciences 2010年第6期22卷 840-845页

作者： Eunjeong Lee Chounghyun Seong Hakkwan Kim Seungwoo Park Moonseong Kang department of landscape architecture and Rural Systems Engineering Research Institute for Agricultural & Life Sciences Seoul National University

This study described the development and validation of an artificial neural network （ANN） for the purpose of analyzing the effects of climate change on nonpoint source （NPS） pollutant loads from agricultural small watershed. The runoff discharge was estimated using ANN algorithm. The performance of ANN model was examined using observed data from study watershed. The simulation results agreed well with observed values during calibration and validation periods. NPS pollutant loads were calculated from load-discharge relationship driven by long-term monitoring data. LARS-WG （Long Ashton Research Station-Weather Generator） model was used to generate rainfall data. The calibrated ANN model and load-discharge relationship with the generated data from LARS-WG were applied to analyze the effects of climate change on NPS pollutant loads from the agricultural small watershed. The results showed that the ANN model provided valuable approach in estimating future runoff discharge, and the NPS pollutant loads.

关键词： artificial neural network climate change LARS-WG nonpoint source pollution runoff

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

A KH Domain-Containing Putative RNA-Binding Protein Is Critical for Heat Stress-Responsive Gene Regulation and Thermotolerance in Arabidopsis

引用

Molecular Plant 2013年第2期6卷 386-395页

作者： Qingmei Guan Changlong Wen Haitao Zeng Jianhua Zhu department of Plant Science and landscape architecture University of Maryland College Park MD 20742 USA

Heat stress is a severe environmental factor that significantly reduces plant growth and delays develop-ment. Heat stress factors （HSFs） are a class of transcription factors that are synthesized rapidly in response to elevations in temperature and are responsible for the transcription of many heat stress-responsive genes including those encoding heat shock proteins （HSPs）. There are 21 HSFs in Arabidopsis, and recent studies have established that the HSFA1 family members are master regulators for the remaining HSFs. However, very little is known about upstream molecular factors that control the expression of HSFA1 genes and other HSF genes under heat stress. Through a forward genetic analysis, we identified RCF3, a K homology （KH） domain-containing nuclear-localized putative RNA-binding protein. RCF3 is a neg- ative regulator of most HSFs, including HSFAla, HSFAlb, and HSFAld. In contrast, RCF3 positively controls the expression of HSFAle, HSFA3, HSFAg, HSFB3, and DREB2C. Consistently with the overall increased accumulation of heat-responsive genes, the rcf3 mutant plants are more tolerant than the wild-type to heat stress. Together, our results suggest that a KH domain-containing putative RNA-binding protein RCF3 is an important upstream regulator for heat stress-responsive gene expression and thermotolerance in Arabidopsis.

关键词： RNA-binding protein RCF3 HSF HSR

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

Genome-editing technologies and their potential application in horticultural crop breeding

引用

horticulture Research 2015年第1期2卷 224-233页

作者： Jin-Song Xiong Jing Ding Yi Li College of horticulture Nanjing Agricultural UniversityNanjingJiangsu Province 210095The People's Republic of China department of Plant Science and landscape architecture University of ConnecticutStorrsCT 06269USA

Plant breeding,one of the oldest agricultural activities,parallels human *** crops have been domesticated to satisfy human's food and aesthetical needs,including numerous specialty horticultural crops such as fruits,vegetables,ornamental flowers,shrubs,and *** varieties originated through selection during early human *** technologies,such as various forms of hybridization,mutation,and transgenics,have also been invented and applied to crop breeding over the past *** progress made in these breeding technologies,especially the modern biotechnology-based breeding technologies,has had a great impact on crop breeding as well as on our ***,we first review the developmental process and applications of these technologies in horticultural crop ***,we mainly describe the principles of the latest genome-editing technologies and discuss their potential applications in the genetic improvement of horticultural *** advantages and challenges of genome-editing technologies in horticultural crop breeding are also discussed.

关键词： breeding crops potential

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

Exploration of nature-based biomimetic approach in landscape architectural design: parametric study of candelabra model design

引用

Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 278-288页

作者： Biljana S.Jović Anđela D.Mitić department of landscape architecture Faculty of ForestryUniversity of BelgradeBelgrade 11000Serbia

This research provides an exploration of a biomimetic approach in the process of designing a candelabra model using linear shaped leaves of a Bell *** design process described in this research contains two steps:biological and *** the first biological step,a proper model for the creation of an urban element was found from nature in a Bell flower(Campanula persicifolia L.).The upper leaves of the selected plant,which are small with a linear spear and sharpening at the top,were chosen for the modeling *** second step included applying two geometrical methods,i.e.,Voronoi diagrams and Delaunay triangulation.A geometrical leaf form of the selected plant species and the modeling process were obtained using aparametric modeling software,*** different Blender plug-ins and modifiers,Delaunay triangulation and Voronoi diagram were implemented by marking the starting points on the leaf form in the image data source,adjusting the Delaunay triangulation parameters,and creating Voronoi diagrams in which the Voronoi points were located at the shortest distance from the edges of the Voronoi ***,a three dimensional model of a candelabra was developed through this study.

关键词： Biomimetic approach landscape architectural design Parametric study Blender software Three dimensional model of candelabra

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

FOOD PRODUCTION ON A LIVING WALL:PILOT STUDY

引用

Journal of Green Building 2017年第3期12卷 23-38页

作者： Lara Nagle Stuart Echols Ken Tamminga department of landscape architecture The Pennsylvania State UniversityUniversity ParkPennsylvania 16802

Living walls and other vertical green infrastructure on building surfaces provide regulating,supporting,and cultural ecosystem services in the built *** walls can also generate food as a provisioning ecosystem *** article discusses a pilot study monitoring the productivity of a 7.5 m^(2) outdoor living wall system planted with produce crops during the 2015 summer growing season in State College,Pennsylvania,***,water usage,and soil moisture data were also collected to assess context and performance of the living wall system during the growing season.

关键词： living walls green walls urban agriculture ecosystem services Green Infrastructure(GI)

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

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：