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Calculation method on shape finding of self-anchored suspension bridge with spatial cables

Yan HAN, Zhengqing CHEN, Shidong LUO, Shankui YANG

《结构与土木工程前沿（英文）》 2009年第3卷第2期页码 165-172 doi: 10.1007/s11709-009-0021-6

摘要： Based on the spatial model, a reliable and accurate calculation method on the shape finding of self-anchored suspension bridge with spatial cables was studied in this paper. On the principle that the shape of the main cables between hangers is catenary, the iteration method of calculating the shapes of the spatial main cables under the load of hanger forces was deduced. The reasonable position of the saddle was determined according to the shape and the theoretical joint point of the main cables. The shapes of the main cables at completed cable stage were calculated based on the unchanging principle of the zero-stress lengths of the main cables. By using a numerical method combining with the finite element method, one self-anchored suspension bridge with spatial cables was analyzed. The zero-stress length of the main cables, the position of the saddle, and the pre-offsetting of the saddle of the self-anchored suspension bridge were given. The reasonable shapes of the main cables at bridge completion stage and completed cable stage were presented. The results show that the shape-finding calculation method is effective and reliable.

关键词： bridge engineering self-anchored suspension bridges special cables shape-finding calculation method

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Parametric oscillation of cables and aerodynamic effect

Yong XIA, Jing ZHANG, Youlin XU, Yozo FUJINO,

《结构与土木工程前沿（英文）》 2010年第4卷第3期页码 321-325 doi: 10.1007/s11709-010-0028-z

摘要： This paper addresses the aerodynamic effect on the nonlinear oscillation, particularly parametric vibration of cables in cable-stayed bridges. A simplified 2-DOF model, including a beam and a stayed cable, is formulated first. Response of the cable under global harmonic excitation which is associated with wind speed is obtained using the multiple scales method. Via numerical analysis, the stability condition of the cable in terms of wind speed is derived. The method is applied to a numerical example and a long-span bridge to analyze its all stay cables. It is demonstrated that very large vibration at one of the longest cables in the middle span of the bridge can be parametrically excited when the wind speed is over around 210 km/h (58.5 m/s).

关键词： parametric vibration cables cable-stayed bridge nonlinear vibration

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Special Column on

《结构与土木工程前沿（英文）》 2014年第8卷第4期页码 323-324 doi: 10.1007/s11709-014-0288-0

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Comments on the special issue of

Neil C. TURNER

《农业科学与工程前沿（英文）》 2017年第4卷第2期页码 254-255 doi: 10.15302/J-FASE-2017156

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千米级斜拉桥长索架设技术

饶华容,邓惠斌

《中国工程科学》 2009年第11卷第3期页码 71-74

摘要：

以苏通长江公路大桥为例介绍了千米级斜拉桥斜拉索安装方法及其施工要点。论述了斜拉索的桥面展开、塔端挂设、梁端牵引锚固以及PE保护等长索安装施工的关键技术问题。长索桥面的展开采用立式放索，梁端牵引锚固采用卷扬机、钢绞线以及张拉杆共同组成的三级组合牵引方式，长索张拉在梁端进行。

关键词：千米级斜拉桥斜拉索长索张挂工艺长索安装

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HIGHLIGHTS OF THE SPECIAL ISSUE ON “HORTICULTURE RESEARCH FOR GREEN AND SUSTAINABLE DEVELOPMENT” EDITORIAL

《农业科学与工程前沿（英文）》 2021年第8卷第2期 doi: 10.15302/J-FASE-2021396

摘要：

Horticulture is the science and technology of intensively cultivating plants for food, comfort and beautification purposes. Horticulture comprises a wide range of plants and crops including fruit and nut trees, vegetables, edible fungi, and ornamental plants, as well as tea plants also categorized as horticultural crops in some countries including China. Horticultural products are of great value and serve as important dietary sources of antioxidants, vitamins and mineral nutrients for human nutrition and health. Development of a green and sustainable horticulture, producing more and safer fruit and vegetables, is a prerequisite for meeting the ever-increasing demand of the growing human population.

In contrast to other field crops or model plants, horticulture comprises a diverse group of plants ranging from annual to perennial crops that are primarily grown for fresh consumption, which means their cultivation and breeding methods are quite different from other plants, in particular, in somatic variation or bud-sport, grafting propagation, flowering regulation, organogenetic development and postharvest storage systems. Horticultural research mainly focuses on breeding, cultivation and postharvest production related biological questions, to generate knowledge beneficial for cultivar improvement for better quality and year-round supply, to understand biological basis and regulation of quality formation and maintenance. However, owing to the long juvenile period, polyembryony (such as in citrus), large canopy of perennial horticultural plants, especially for fruit crops, basic and applied research has progressed slowly over the years.

Recently, with the rapid development of high-throughput sequencing technology, research in horticulture has entered the new ‘omics’ era. A large number of datasets for horticultural plants obtained through multi-omics including genomics, epigenomics, transcriptomics, proteomics and metabolomics, are now available, which provides many clues for understanding the molecular basis of agronomically important traits. To date, high-quality draft genome sequences have been accomplished for more than 30 horticultural plant species. Based on these reference genomes, resequencing data and newly developed molecular markers, numerous key candidate loci/genes controlling major agronomical traits of perennial horticultural plants have been identified through BSA and GWAS analysis of genetic populations, using these strategies that have been successfully and widely applied to field crops and model plants. One prime example is the genetic locus responsible for citrus polyembryony, which was recently narrowed to an 80-kb region containing 11 candidate genes by comparative genomic analysis of natural citrus populations, identifying CitRWPas the key candidate gene controlling polyembryony. This approach was also applied to QTL mapping and candidate gene mining for fruit quality (including sugar, acid, TSS and carotenoid), fruit shape, fruit size, fruit weight traits in perennial horticultural plants, such as apple, citrus, grape, peach and pear. Also, recent research on the exploitation and utilization of short-juvenile germplasm, like mini-citrus as a model plant, has facilitated functional genomics of fruit crops. A number of functional genes and their molecular mechanisms were successively identified, thereby accelerating the breeding and genetic improvement of main cultivars.

Considering the rapid progress of horticulture research and its indispensable contribution to human health, Frontiers of Agricultural Science and Engineering (FASE) is launching a special issue “Horticulture Research for Green and Sustainable Development”. We invited experts with rich experience in studies of fruit crops, vegetables, ornamentals and tea plants to share their new research achievements and perspectives. A total of 11 articles are included in this special issue. Its research findings cover QTL mapping and key gene mining for maesil weeping traits (https://doi.org/10.15302/J-FASE-2020379) and tea flavonoid metabolism (https://doi.org/10.15302/J-FASE-2021382), functional identification of apple anthocyanin biosynthetic regulator MdMYB1 in controlling ascorbic acid accumulation (https://doi.org/10.15302/J-FASE-2020367), trifoliate orange PtLEA7 protein (https://doi.org/10.15302/J-FASE-2020368) and apple SUMO E3 Ligase MdSIZ1 (https://doi.org/10.15302/J-FASE-2021388) in modulating drought tolerance, tomato D1 protein turnover in photoprotection under sub-high temperature and high light conditions (https://doi.org/10.15302/J-FASE-2021383), and tomato FNC gene in determining the fruit netted-cracking phenotype (https://doi.org/10.15302/J-FASE-2020374). Electrical signals have been reported to be widely generated in response to various environmental changes and are recognized as vital for plant defense, Hu et al. investigated the characteristics of herbivory/wound-elicited electrical signal transduction in tomato, found GLR3.3 and GLR3.5 function as key regulators in leaflet-to-leaflet electrical signal transduction and JA accumulation (https://doi.org/10.15302/J-FASE-2021395). Ploidy manipulation via diploid by tetraploid interploidy crosses is widely used for breeding triploid seedless cultivars. Xia et al. (https://doi.org/10.15302/J-FASE-2021385) produced 182 triploid and 36 tetraploid plants between the diploid Orah mandarin and three allotetraploid somatic hybrids, and further revealed the mechanism of tetraploid hybrids formation by the fertilization of 2n megagametophytes via second division restitution. Two reviews are also included in this special issue. Ji et al. reviewed the recent advances in the regulation of climacteric fruit ripening in terms of phytohormones, transcription factors and epigenetic modifications (https://doi.org/10.15302/J-FASE-2021386). Makkumrai et al. compared the planting locations, climates, cultivation systems, orchard managements, fruit characteristics, and main metabolites between Chinese and Thailand pummelos, highlighted the potential resources for pummelo breeding and genetic improvement (https://doi.org/10.15302/J-FASE-2021391).

As the guest editors, we thank all the authors and reviewers for their great contributions to this special issue on “Horticulture Research for Green and Sustainable Development”, and the FASE editorial team for their great support. We hope the research findings in this issue represent the main concerns of horticulture researchers and producers, and will be beneficial to quality promotion and cultivar improvement of horticultural crops and ensure a green and sustainable development of horticultural industry.

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CORRECTION to: Special issue: Decision, risk analytics and data intelligence

Xiaozhe ZHAO, Desheng Wu

《工程管理前沿（英文）》页码 697-697 doi: 10.1007/s42524-020-0139-8

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HIGHLIGHTS OF THE SPECIAL ISSUE “PROGRESS ON NITROGEN RESEARCH FROM SOIL TO PLANT AND TO THE ENVIRONMENT

《农业科学与工程前沿（英文）》 2022年第9卷第3期页码 313-315 doi: 10.15302/J-FASE-2022460

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Preface to special issue on “Engineering Nanostructured Materials for Advanced Energy and Environmental

《化学科学与工程前沿（英文）》 2023年第17卷第11期页码 1621-1622 doi: 10.1007/s11705-023-2365-1

摘要： Preface to special issue on “Engineering Nanostructured Materials for Advanced Energy and Environmental Catalysis”

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Highlights of special issue on forestry

Shougong ZHANG

《农业科学与工程前沿（英文）》 2017年第4卷第4期页码 373-375 doi: 10.15302/J-FASE-2017188

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Highlights of special issue on Animal Science

Jun REN

《农业科学与工程前沿（英文）》 2017年第4卷第3期页码 257-259 doi: 10.15302/J-FASE-2017165

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Preface to special issue on “Advanced Materials and Catalysis”

《化学科学与工程前沿（英文）》 2021年第15卷第6期页码 1357-1359 doi: 10.1007/s11705-021-2119-x

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Introduction to the special issue on food technology

Jian CHEN,

《化学科学与工程前沿（英文）》 2009年第3卷第4期页码 345-345 doi: 10.1007/s11705-009-0243-0

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Introduction to the special section for ACMFMS 2010

Jinhao QIU

《机械工程前沿（英文）》 2011年第6卷第3期页码 271-271 doi: 10.1007/s11465-011-0239-6

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The effects of festivals and special events on city image design

LIU Yuan, CHEN Chong

《结构与土木工程前沿（英文）》 2007年第1卷第2期页码 255-259 doi: 10.1007/s11709-007-0032-0

摘要： City marketing provides a good vehicle to strengthen a city in competition. On the analysis of the important roles of events and city image in the context of city marketing, this paper suggests that holding festivals or special events is an effective approach to enhance city marketing. The positive impacts of festivals and special events, such as the identification of city image, the promotion of the transmission of city image, and the reversal of the negative image of the city, are discussed. The negative impacts of festivals and special events are also talked about. The unique image of the city could be identified by the City Mind Identity, the City Visual Identity and the City Behavior Identity concerned with festivals and special events.

关键词： Visual Identity reversal transmission marketing Behavior Identity