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| 1 | Design and field tests of a deck-extension bridge with small box girder显示文摘A jointless bridge could fundamentally eliminate vulnerable deck joints, thereby meeting the need for sustainable development of bridges, especially for an expressway with highspeed traffic. In this paper, one jointless bridge(deck-extension bridge) with a small box girder in an expressway was chosen as a case study to examine the structural design,construction and field test. The field tests of the bridge indicated that the designed and constructed structures can satisfy the requirement for service performance of the deckextension bridge. Some key technologies, such as the position of longitudinal reinforcements in the superstructure-approach slab connections and the arrangement of the sliding material layers, were introduced. The longitudinal thermal movement of the superstructure in the deck-extension bridge with a small box girder could be predicted accurately by using the average temperature of the cross section of a small box girder. The finite element model, built by using the MIDAS program, was used to analyze the temperature distribution on the cross section of a small box girder, the accuracy of which could be verified by comparing with the measured values. The maximum longitudinal thermal movement of the superstructure in deck-extension bridges with a small box girder under historically extreme temperature conditions was predicted. | Junqing Xue Bruno Briseghella Jianhui Lin Fuyun Huang Baochun Chen | 2018 | Journal of Traffic and Transportation Engineering(English Edition)2018，5，6： | 7 |
| 2 | The novel gene BrMYB2,located on chromosome A07,with a short intron 1 controls the purple-head trait of Chinese cabbage(Brassica rapa L.)显示文摘Anthocyanins are important secondary metabolites in plants,but information on anthocyanin biosynthesis mechanisms in Chinese cabbage is limited.The new purple head Chinese cabbage cultivar 11S91 was analyzed,and an R2R3-MYB regulatory gene BrMYB2,located on chromosome A07,controlling the dominant purple-head trait was isolated.High expression of BrMYB2 generated a large accumulation of anthocyanins in 11S91,accompanied by highly upregulated BrTT8,BrF3′H,BrDFR1,BrANS1,BrUGTs,BrATs,and BrGSTs.11S91 inherited the purple locus from purple trait donor 95T2-5,and they shared consensus CDSs and gDNAs with those of BrMYB2(cBrMYB2 and gBrMYB2).Two SNPs in cBrMYB2 in 11S91 did not cause loss of function;in addition to several SNPs at both ends of intron 1,a large deletion had occurred in intron 1 of gBrMYB2 in 11S91.Genetic transformation of Arabidopsis showed that gBrMYB2 overexpression lines presented deeper purple color and higher expression than did the cBrMYB2 and cBrmyb2 lines,whereas gBrmyb2 with a long intron 1 did not cause the purple phenotype.We first show that BrMYB2 promotes anthocyanin biosynthesis under the control of the short intron 1 of gBrMYB2 in purple head Chinese cabbage,and gBrmyb2 with a long intron 1 represses anthocyanin production in white head Chinese cabbage.This evidence provides a new understanding of anthocyanin biosynthesis and purple germplasm generation in Brassica vegetables. | Qiong He Junqing Wu Yihua Xue Wenbin Zhao Ru Li Lugang Zhang | 2020 | Horticulture Research2020，7，1： | 4 |
| 3 | Distributed Flow Shop Scheduling with Sequence-Dependent Setup Times Using an Improved Iterated Greedy Algorithm显示文摘To meet the multi-cooperation production demand of enterprises,the distributed permutation flow shop scheduling problem(DPFSP)has become the frontier research in the field of manufacturing systems.In this paper,we investigate the DPFSP by minimizing a makespan criterion under the constraint of sequence-dependent setup times.To solve DPFSPs,significant developments of some metaheuristic algorithms are necessary.In this context,a simple and effective improved iterated greedy(NIG)algorithm is proposed to minimize makespan in DPFSPs.According to the features of DPFSPs,a two-stage local search based on single job swapping and job block swapping within the key factory is designed in the proposed algorithm.We compare the proposed algorithm with state-of-the-art algorithms,including the iterative greedy algorithm(2019),iterative greedy proposed by Ruiz and Pan(2019),discrete differential evolution algorithm(2018),discrete artificial bee colony(2018),and artificial chemical reaction optimization(2017).Simulation results show that NIG outperforms the compared algorithms. | Xue Han Yuyan Han Qingda Chen Junqing Li Hongyan Sang Yiping Liu Quanke Pan Yusuke Nojima | 2021 | Complex System Modeling and Simulation2021，1，3： | 4 |
| 4 | The optimal shapes of piles in integral abutment bridges显示文摘Integral abutment bridges(IABs) can be used to avoid the durability issues associated with bearings and expansion joints. For this type of bridge, the design of the optimal pile foundation, especially with respect to the horizontal stiffness, is a challenging issue. A structural optimization approach is proposed in this paper to optimize the pile foundation shape in integral abutment bridges. A procedure was implemented based on linking MATLAB, where an optimization code was developed, and OpenSees, which was used as the finite element solver. The optimization technique was compared with other techniques developed in previous researches to verify its reliability; the technique was then applied to a real 400 m-long IAB building in Verona, Italy, as a case study. The following two possibilities were considered and compared:(a) a pile with two different diameters along the depth and(b) a pile with a pre-hole. In fact, to increase the lateral and rotational flexibilities of the pile head, piles for an integral abutment bridge foundation are often driven into predeep holes filled with loose sand. Finally, the case of super-long integral abutment bridges(L = 500 m) with a corresponding displacement on one bridge end of approximately 50 mm was analysed. The following four pile design optimization cases were considered with similar study criteria as the Isola della Scala Bridge:(a) a pinned pile head for semi-integral abutment,(b) a fixed pile head without a pre-hole,(c) a fixed pile head with a pre-hole of any depth,(d) a fixed pile head of a pre-hole with a depth limit(< 2 m) allowing for enough embedded length for the friction pile. The case studies confirmed the potential of the proposed optimization techniques for finding the optimal shape of piles in integral abutment bridges. | Cheng Lan Bruno Briseghella Luigi Fenu Junqing Xue Tobia Zordan | 2017 | Journal of Traffic and Transportation Engineering(English Edition)2017，4，6： | 3 |
| 5 | Timber-concrete composite bridges:Three case studies显示文摘During the last years, timber-concrete composite(TCC) structures have been extensively used in Europe both in new and existing buildings. Generally speaking, a composite structure combines the advantages of both materials employed: the strength and stiffness of the concrete in compression and the tensile strength, lightweight, low embodied energy, and aesthetical appearance of the timber. The concrete slab provides protection of the timber beams from direct contact with water, which is crucial to ensure the durability of the timber beams, particularly when used for bridges. Different types of connectors can be used to provide force exchange between the concrete slab and the timber beam. The choice of a structurally effective yet cheap shear connection between the concrete topping and the timber joist is crucial to make the TCC structures a viable solution that can compete with reinforced concrete and steel structures. In this paper, the possibilities offered by TCC structures for short-span bridge decks are discussed. The technology of TCC structures and the general design rules are illustrated. Three case studies are reported, including a short-span bridge tested in Colorado, USA, with the timber layer being constructed from recycled utility poles and notch connection; a TCC bridge with glulam beams and triangular notches with epoxyglued rebar connectors built in Portugal; and a TCC bridge with glulam beams and rectangular notches built in Germany. All the solutions were found to be structurally effective and aesthetically pleasing. They can all provide a sustainable option for short-span bridges. | Massimo Fragiacomo Amedeo Gregori Junqing Xue Cristoforo Demartino Matteo Toso | 2018 | Journal of Traffic and Transportation Engineering(English Edition)2018，5，6： | 2 |
| 6 | Effects of debonding on circular CFST stub columns显示文摘 | Xue Junqing Briseghella Bruno Chen Baochun | 2012 | Journal of Constructional Steel Research2012，69，1： | 1 |
| 7 | Metagenomics reveals contrasting energy utilization efficiencies of captive and wild camels(Camelus ferus)显示文摘Captive conditions can affect the symbiotic microbiome of animals.In this study,we compared the structural and functional differences of the gastrointestinal microbiomes of wild Bactrian camels(Camelus ferus)between wild and captive populations,as well as their different host energy utilization performances through metagenomics.The results showed that wild-living camels harbored more microbial taxa related to the production of volatile fatty acids,fewer methanogens,and fewer genes encoding enzymes involved in methanogenesis,leading to higher energy utilization efficiency compared to that of captive-living camels.These findings suggest that the wild-living camel fecal microbiome demonstrates a series of adaptive characteristics that enable the host to adjust to a relatively barren field environment.Our study provides novel insights into the mechanisms of wildlife adaptations to habitats from the perspective of the microbiome. | Liping YAN Liping TANG Zhichao ZHOU Wei LU Bo WANG Zhicheng SUN Xue JIANG Defu HU Junqing LI Dong ZHANG | 2022 | Integrative Zoology2022，17，3： | 0 |
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