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温电耦合轧制中预热温度对AZ31镁合金铸轧板组织及性能的影响

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锻压技术 2025年第1期50卷 113-121页

作者：白珊王仪青卢云高翔宇太原科技大学机械工程学院阳泉煤业集团华越机械有限公司山西龙源新能源有限公司

“非热效应”是温电耦合轧制(TER)提升镁合金成形能力的重要机制，该“非热效应”的激发需要一定的温度作为能量基础，而过高的预热温度又会抑制“非热效应”的发挥，选择合理的预热温度成为温电耦合轧制镁合金的关键。针对此问题，研... 详细信息

“非热效应”是温电耦合轧制(TER)提升镁合金成形能力的重要机制，该“非热效应”的激发需要一定的温度作为能量基础，而过高的预热温度又会抑制“非热效应”的发挥，选择合理的预热温度成为温电耦合轧制镁合金的关键。针对此问题，研究了不同预热温度下温轧(WR)和温电耦合轧制(TER)工艺对AZ31镁合金铸轧板组织和力学性能的影响。结果表明，TER中的脉冲电流可以加速动态再结晶过程，细化均匀组织。脉冲电流的“非热效应”和温度有强相关性，其可以通过在较低温度下促进再结晶来提升轧板的力学性能，本质是“非热效应”可以加速合金内部的位错运动及空位扩散。在预热温度为150～300℃内，相同预热温度下TER工艺的样品在抗拉强度和伸长率方面均优于WR工艺的样品，其中200℃时，TER工艺板材的综合力学性能较优，相比于相同预热温度下的WR工艺板材，抗拉强度提升了约20.6%,伸长率增长了约232.9%。

关键词： AZ31镁合金脉冲电流轧制伸长率抗拉强度

The Sequential Pricing of Ride-Hailing System with Rental Service in the Context of Fleet Electrification

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Journal of Systems Science and Systems Engineering 2024年第1期33卷 77-105页

作者： Yaoyao Ku Peng Wu Qiang Ren yiqing wang Business School Sichuan UniversityChengdu610065China

Surging demand and reduced capacity in the ride-hailing industry have prompted numerous ride-hailing platforms to build their own car-rental services catering to drivers who do not possess private vehicles. However, the trade-off between the ride-hailing service and the car-rental service is an important issue that is still unclear in theory. Moreover, ride-hailing platforms are transitioning towards all-electric fleets in the context of Carbon Neutrality goals and government regulations. This paper considers a ride-hailing system comprising a monopolist ride-hailing platform, an electric vehicle (EV) rental firm, and a gasoline vehicle (GV) rental firm. Furthermore, we build a stylized model to study the sequential pricing of the system. The equilibrium outcomes show the significant impact of the ride-hailing platform’s decision to continue or withdraw offering EV rental services on EV and GV drivers’ net earnings, rental prices, and wages. The ride-hailing platform providing EV rental services increases EV drivers’ net earnings but decreases the GV driver wages and rental prices. However, the EV rental service offered by the ride-hailing platform does not necessarily lead to an increased total profit for the system. The improved profitability of the system by the ride-hailing platform providing EV rental services is contingent upon lower rider prices and higher fuel costs. The ride-hailing platform’s EV rental services provision also effectively fosters the ride-hailing fleet’s electrification. Furthermore, as the number of riders increases, the ride-hailing platform should reduce the commission rate for EV drivers to maintain competitiveness and profitability.

关键词： Ride-hailing system car rental fleet electrification sequential pricing differential wage scheme

Repress,on of MYBL2 by Both microRNA858a and HY5 Leads to the Activation of Anthocyanin Biosynthetic Pathway in Arabidopsis

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Molecular Plant 2016年第10期9卷 1395-1405页

作者： Yulong wang yiqing wang Zhaoqing Song Huiyong Zhang State Key Laboratory of Wheat and Maize Crop Science Collaborative Innovation Center of Henan Grain Crops College of Life Science Henan AgriculturalUniversity Zhengzhcu 450002 China

Extensive studies in various plants show that the anthocyanin biosynthetic process is affected by environmental factors and regulated by many transcription factors through sophisticated regulatory networks. However, it remains largely unclear about the roles of microRNA in this process. Here, we demonstrate that miR858a is a positive regulator of anthocyanin biosynthesis in Arabidopsis seedlings. Overexpression of miR858a enhances the accumulation of anthocyanins, whereas the reduced miR858a activity results in low levels of anthocyanins in STTM858 transgenic plants. We found that miR858a inhibits the expression of MYBL2, a key negative regulator of anthocyanin biosynthesis, by translational repression. In addition, ELONGATED HYPOCOTYL 5 （HYS） was shown to directly bind the MYBL2 promoter and represses its expression via specific histone modifications. Interestingly, we found that miR858a exhibits light- responsive expression in an HY5-dependent manner. Together, these results delineate the HY5- MIR858a-MYBL2 loop as a cellular mechanism for modulating anthocyanin biosynthesis, suggesting that integration of transcriptional and posttranscriptional regulation is critical for governing proper anthocyanin accumulation in response to light and other environmental factors.

关键词： anthocyanin MYBL2 translational repression miR858a HY5

The advantages of multi-level omics research on stem cell-based therapies for ischemic stroke

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Neural Regeneration Research 2024年第9期19卷 1998-2003页

作者： yiqing wang Chuheng Chang Renzhi wang Xiaoguang Li Xinjie Bao 4+4 Doctor Medical Program Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijingChina Department of Neurosurgery Peking Union Medical College HospitalPeking Union Medical CollegeChinese Academy of Medical SciencesBeijingChina Beijing Key Laboratory for Biomaterials and Neural Regeneration School of Biological Science and Medical EngineeringBeihang UniversityBeijingChina Department of Neurobiology School of Basic Medical SciencesCapital Medical UniversityBeijingChina

Stem cell transplantation is a potential therapeutic strategy for ischemic stroke. However, despite many years of preclinical research, the application of stem cells is still limited to the clinical trial stage. Although stem cell therapy can be highly beneficial in promoting functional recovery, the precise mechanisms of action that are responsible for this effect have yet to be fully elucidated. Omics analysis provides us with a new perspective to investigate the physiological mechanisms and multiple functions of stem cells in ischemic stroke. Transcriptomic, proteomic, and metabolomic analyses have become important tools for discovering biomarkers and analyzing molecular changes under pathological conditions. Omics analysis could help us to identify new pathways mediated by stem cells for the treatment of ischemic stroke via stem cell therapy, thereby facilitating the translation of stem cell therapies into clinical use. In this review, we summarize the pathophysiology of ischemic stroke and discuss recent progress in the development of stem cell therapies for the treatment of ischemic stroke by applying multi-level omics. We also discuss changes in RNAs, proteins, and metabolites in the cerebral tissues and body fluids under stroke conditions and following stem cell treatment, and summarize the regulatory factors that play a key role in stem cell therapy. The exploration of stem cell therapy at the molecular level will facilitate the clinical application of stem cells and provide new treatment possibilities for the complete recovery of neurological function in patients with ischemic stroke.

关键词： ischemic stroke mesenchymal stem cells metabolomics multilevel omics neural stem/progenitor cells neuroinflammation pathophysiology proteomics stem cell therapy transcriptomes

QoE based power control scheme for interference mitigation in high-density WLANs

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The Journal of China Universities of Posts and Telecommunications 2016年第2期23卷 24-30页

作者： wang yiqing Wen Xiangming Hu Zhiqun Lu Zhaoming School of Telecommunication Engineering Beijing University of Posts and Telecommunications

Mobile data traffic is going through an explosive growth recently as mobile smart devices become more and more ubiquitous, causing huge pressure on cellular network. Taking advantage of its low cost and easy-to-deploy feature, wireless local-area networks（WLAN） becomes increasingly popular to offload data streams from cellular network, followed by higher and higher density of its deployment. However, the high density of WLAN will cause more interference, which results in degradation of its performance. Therefore, in order to enhance the performance of the network, we aim to minimize the interference caused by high density of WLAN. In this paper, we propose a novel power control scheme to achieve the above aim. We use the quality of experience（QoE） evaluation to coordinate the power of each access point（AP） and finally realize the optimization of the entire network. According to the simulation results, our scheme improves the performance of the network significantly in many aspects, including throughput and QoE.

关键词： power control high-density WLAN interference mitigation QoE

Bio-Inspired Gelatin-Based Adhesive Modified with Waterborne Polyurethane on Click Chemistry

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Journal of Renewable Materials 2022年第11期10卷 2747-2763页

作者： Xuechuan wang Wenying Zhao Xugang Dang yiqing wang Huijie Zhang College of Bioresources Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi’an710021China National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi University of Science and TechnologyXi’an710021China

As a non-toxic,highly reactive biomass material,gelatin is wildly used as the component of biomass-based ***,like most aqueous adhesives,gelatin-based adhesives suffer from long solidifying time or high solidifying temperature due to the low volatility of water,which highly limits the application potential of gelatinbased *** by the fast adhesion of marine organisms through the formation of chemical crosslinks,herein,a kind of low temperature curable eco-friendly gelatin-based adhesive with good adhesive properties and fast curing at low temperature is developed by introducing clicking chemical Diels-Alder(DA)reaction between blocked waterborne polyurethane(MWPU)and *** furfuryl glycidyl ether(FGE)and 4-Maleimidophenol(4-HPM)for the DA reaction are grafted on gelatin,and the end-capping of MWPU,*** the addition of MWPU and FGE,the cross-linking degree of gelatin increased,and the adhesion properties of the adhesive were *** shear strength and T-peel strength of the modified adhesive reached 0.95 MPa and 1.42 N/mm,respectively,after the curing time of 8 min at 40℃,which can meet the application requirements as adhesive for bio-medical use.

关键词： Gelatin blocked waterborne polyurethane eco-friendly adhesive skin solid wastes

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兰科植物花期调控技术及分子机理研究进展

植物遗传资源学报 2025年第1期26卷 1-13页

作者：陈露李青女郑佳桐王奕晴翟俊文吴沙沙福建农林大学风景园林与艺术学院/兰科植物保护与利用国家林业和草原局重点实验室福州350002

兰科是被子植物中最大的科之一,物种繁多,分布广泛,因其奇特的花型、丰富的花色和持久的花期,具有极高的观赏价值。兰科植物也是国际上贸易最多的花卉之一,具有极高的经济价值。其开花时间和花朵品质是影响兰科植物观赏价值的重要因素,... 详细信息

兰科是被子植物中最大的科之一,物种繁多,分布广泛,因其奇特的花型、丰富的花色和持久的花期,具有极高的观赏价值。兰科植物也是国际上贸易最多的花卉之一,具有极高的经济价值。其开花时间和花朵品质是影响兰科植物观赏价值的重要因素,但由于大部分兰科植物的自然花期与市场需求错位、开花整齐度低、开花品质不佳,极大地限制了兰花产业的发展。因此,如何调控兰花花期、提升兰花花朵品质对兰科植物的生产和应用具有重要意义。本文结合国内外研究对兰科植物的花芽分化进程、花期调控技术及开花相关的分子调控机理进行综述,总结出兰科植物花芽分化的特征、兰科植物花期调控相关基础研究与技术存在的问题、兰科植物相关的开花途径以及蝴蝶兰相关的开花机理与花期调控技术,提出兰科植物花期调控机理和花期调控技术具有潜在研究价值的方向,以期为兰科植物的花期调控研究、规模化生产和品质提升提供参考。

关键词：兰科植物花芽分化花期调控分子机理

Adaptive WiFi-offloading algorithm based on attractor selection in heterogeneous wireless networks

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The Journal of China Universities of Posts and Telecommunications 2015年第6期22卷 94-100页

作者： Hu Zhiqun Wen Xiangming Lu Zhaoming wang yiqing Ling Dabing School of Telecommunication Engineering Beijing University of Posts and Telecommunications

The unforeseen mobile data explosion poses a major challenge to the performance of today＇s cellular networks, and cellular networks are in urgent need of novel solutions to handle such voluminous mobile data. Obviously, data offioading through third-party WiFi access points （APs） can effectively alleviate the data load in the cellular networks with a low operational and capital expenditure. In this paper, we propose and analyze an adaptive WiFi-offioading algorithm based on attractor selection in heterogeneous wireless networks. In the proposed WiFi-offloading algorithm, the WiFi system throughput and cellular throughput in the coverage area of WiFi, are mapped into the activity of the attractor, which is the reflector of the current network environment. When the current attractor activity is low, the network is dominated by the noise. Then, the noise triggers the controller to select adaptive attractor, an optimal WiFi-offloading ratio 4, to adapt to the dynamic network environment. And users offload the specific portion of traffic to the WiFi networks with the ratio of φ, which improves the throughput of heterogeneous wireless networks and alleviates the load of cellular networks. Through simulation, we show that the proposed WiFi-offioading algorithm outperforms the existing ones with 21% higher heterogeneous network throughput in a dense traffic environment.

关键词： WiFi-offioading algorithm attractor selection activity heterogeneous w!reless networks

Recombinant adeno-associated virus-based gene therapy combined with tissue engineering for musculoskeletal regenerative medicine

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Biomaterials Translational 2021年第1期2卷 19-29页

作者： yiqing wang Xiangyu Chu Bing wang Department of Orthopaedic Surgery University of Pittsburgh School of MedicinePittsburghPAUSA. Department of Orthopaedics Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

Recombinant adeno-associated viral(rAAV)vector-mediated gene delivery is a novel molecular therapeutic approach for musculoskeletal disorders which achieves tissue regeneration by delivering a transgene to the impaired *** recent years,substantial scientific progress in rAAV gene therapy has led to several clinical trials for human musculoskeletal ***,there are still limitations in developing an optimal gene therapy model due to the low transduction efficiency and fast degradation of the gene *** overcome the challenges of rAAV gene therapy,tissue engineering combined with gene therapy has emerged as a more promising *** rAAV viral vector incorporated into a biomaterial has a more controlled gene expression,lower immune response,and higher efficiency.A number of biomaterials and architectures have been combined with rAAV viral vectors,each having its own advantages and *** review aims to give a broad introduction to combinatorial therapy and the recent progress this new technology has offered.

关键词： gene therapy musculoskeletal regeneration rAAV stem cell tissue engineering