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A novel finite element formulation for static bending analysis of functionally graded porous sandwich

Van Chinh NGUYEN; Trung Thanh TRAN; Trung NGUYEN-THOI; Quoc-Hoa PHAM

《结构与土木工程前沿（英文）》 2022年第16卷第12期页码 1599-1620 doi: 10.1007/s11709-022-0891-4

摘要： This article aims to propose a finite element formulation based on Quasi-3D theory for the static bending analysis of functionally graded porous (FGP) sandwich plates. The FGP sandwich plates consist of three layers including the bottom skin of homogeneous metal, the top skin of fully ceramic and the FGP core layer with uneven porosity distribution. A quadrilateral (Q4) element with nine degrees of freedom (DOFs) per node is derived and employed in analyzing the static bending response of the plate under uniform and/or sinusoidally distributed loads. The accuracy of the present finite element formulation is verified by comparing the obtained numerical results with the published results in the literature. Then, some numerical examples are performed to examine the effects of the parameters including power-law index k and porosity coefficient

ξ

on the static bending response of rectangular FGP sandwich plates. In addition, a problem with a complicated L-shape model is conducted to illustrate the superiority of the proposed finite element method.

关键词： sandwich plates functionally graded porous static bending Quasi-3D theory Q4 element

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基于拓扑绝缘体Sb2Te3的52 nm宽谱可调谐被动调Q掺镱光纤激光器 Research

王涛1,俞强1,2,郭琨1,史鑫尧2,阚雪芬3,徐轶君4,5,吴坚1,4,张凯2,周朴1

《信息与电子工程前沿（英文）》 2021年第22卷第3期页码 287-436 doi: 10.1631/FITEE.2000577

摘要：在本研究中，首先将拓扑绝缘体家族中的二维材料Sb2Te3可饱和吸收体应用在宽谱可调谐被动调Q掺镱光纤激光器中。基于此可饱和吸收体，在掺镱光纤环形腔中获得稳定的波长可调谐被动调Q脉冲，其中心波长可从1040.89 nm连续调节到1092.85 nm。

关键词：拓扑绝缘体；Sb2Te3；光纤激光；被动调Q激光；波长可调谐激光

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Development of a new method for RMR and Q classification method to optimize support system in tunneling

Asghar RAHMATI,Lohrasb FARAMARZI,Manouchehr SANEI

《结构与土木工程前沿（英文）》 2014年第8卷第4期页码 448-455 doi: 10.1007/s11709-014-0262-x

摘要： Rock mass classification system is very suitable for various engineering design and stability analysis. classification method is confirmed by Japan Highway Public Corporation that this method can figure out either strength or deformability of rock mass, further appropriating the amount of rock bolts, thickness of shotcrete, and size of pitch of steel ribs just after the blasting procedure. Based on these advantages of method, in this study, according to data of five deep and long tunnels in Iran, two equations for estimating the value of method from and classification systems were developed. These equations as a new method were able to optimize the support system for and classification systems. From classification and its application in these case studies, it is pointed out that the method for the design of support systems in underground working is more reliable than the and classification systems.

关键词： JH classification Q and RMR classification new method

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二硫化铼超薄纳米片的制备及其在调Q掺铒光纤激光器中的应用 Research

何俊杉1,2,3,4,曾国华1,刘绍贤1,卢海明1,谢锐贤1,戚晶晶1, 陶丽丽1,周博2,3,4

《信息与电子工程前沿（英文）》 2021年第22卷第3期页码 287-436 doi: 10.1631/FITEE.2000339

摘要：本文通过液相剥离法从自制二硫化铼粉末中制备二硫化铼超薄纳米片，并将其应用在调Q掺铒光纤激光器中。将二硫化铼/PVA复合薄膜作为可饱和吸收体放入掺铒光纤激光器中可以获得调Q脉冲输出，脉冲宽度最窄为2.4 μs，输出功率为1.25 mW，揭示了二硫化铼在Q调制方面的潜在应用价值。

关键词：二硫化铼；可饱和吸收体；二维材料；调Q光纤激光器

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An approach for evaluating fire resistance of high strength Q460 steel columns

Wei-Yong WANG, Guo-Qiang LI, Bao-lin YU

《结构与土木工程前沿（英文）》 2014年第8卷第1期页码 26-35 doi: 10.1007/s11709-014-0239-9

摘要： To develop a methodology for evaluating fire resistance of high strength Q460 steel columns, the load bearing capacity of high strength Q460 steel columns is investigated. The current approach of evaluating load bearing capacity of mild steel columns at room temperature is extended to high strength Q460 steel columns with due consideration to high temperature properties of high strength Q460 steel. The critical temperature of high strength Q460 steel column is presented and compared with mild steel columns. The proposed approach was validated by comparing the predicted load capacity with that evaluated through finite element analysis and test results. In addition, parametric studies were carried out by employing the proposed approach to study the effect of residual stress and geometrical imperfections. Results from parametric studies show that, only for a long column (slenderness higher than 75), the magnitude and distribution mode of residual stress have little influence on ultimate load bearing capacity of high strength Q460 steel columns, but the geometrical imperfections have significant influence on any columns. At a certain slenderness ratio, the stability factor first decreases and then increases with temperature rise.

关键词： high strength Q460 steel load bearing capacity temperature

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R158Q and G212S, novel pathogenic compound heterozygous variants in of Gitelman syndrome

《医学前沿（英文）》 2022年第16卷第6期页码 932-945 doi: 10.1007/s11684-022-0963-9

摘要： The dysfunction of Na⁺-Cl⁻ cotransporter (NCC) caused by mutations in solute carrier family12, member 3 gene (SLC12A3) primarily causes Gitelman syndrome (GS). In identifying the pathogenicity of R158Q and G212S variants of SLC12A3, we evaluated the pathogenicity by bioinformatic, expression, and localization analysis of two variants from a patient in our cohort. The prediction of mutant protein showed that p.R158Q and p.G212S could alter protein’s three-dimensional structure. Western blot showed a decrease of mutant Ncc. Immunofluorescence of the two mutations revealed a diffuse positive staining below the plasma membrane. Meanwhile, we conducted a compound heterozygous model—Ncc R156Q/G210S mice corresponding to human NCC R158Q/G212S. Ncc^R156Q/G210S mice clearly exhibited typical GS features, including hypokalemia, hypomagnesemia, and increased fractional excretion of K⁺ and Mg²⁺ with a normal blood pressure level, which made Ncc^R156Q/G210S mice an optimal mouse model for further study of GS. A dramatic decrease and abnormal localization of the mutant Ncc in distal convoluted tubules contributed to the phenotype. The hydrochlorothiazide test showed a loss of function of mutant Ncc in Ncc^R156Q/G210S mice. These findings indicated that R158Q and G212S variants of SLC12A3 were pathogenic variants of GS.

关键词： Gitelman syndrome mouse model compound heterozygous hypokalemia Slc12a3

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GC/LC-Q-TOFMS 两种技术联用同时筛查水果蔬菜中733 种农药残留 Article

庞国芳, 常巧英, 白若镔, 范春林, 张紫娟, 闫宏远, 吴兴强

《工程（英文）》 2020年第6卷第4期页码 432-441 doi: 10.1016/j.eng.2019.08.008

摘要：

本文通过创建LC-Q-TOFMS（525种农药）和GC-Q-TOFMS（485种农药和209种PCBs）两大精确质谱数数据库，开发了一次样品制备、两种高分辨质谱联用同时检测733种农药化学污染物残留的检测方法通过8种代表性水果蔬菜对联用技术的筛查农药范围、灵敏度、回收率和重现性等方法效能评价，显示出这项联用技术有三方面优势：①两种技术联用与单种技术相比，其发现能力分别提高了51.1%（GC-Q-TOFMS，485种）和39.6%（LC-Q-TOFMS，525种）；②联用技术能够满足78%的农药筛查限（SDL）低于10 μg·kg^–1，满足国际&ldquo

关键词：农药残留 GC-Q-TOFMS LC-Q-TOFMS 精确质量数据库谱图库水果蔬菜

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智简无线网络理论与技术 Editorial

张平1,彭木根1,崔曙光2,张朝阳3,毛国强4,全智5,Tony Q. S. QUEK6,荣波7

《信息与电子工程前沿（英文）》 2022年第23卷第1期页码 1-4 doi: 10.1631/FITEE.2210000

摘要： With the acceleration of a new round of global scientific, technological, and industrial revolution, the next generation of information and communication technology, i.e., 6G, will inject new momentum into industry transformation and upgrad-ing, as well as into economic innovation and development. This will subsequently promote a global industrial integration. Wireless communication will be ubiquitous in all areas of future society, supporting novel applications with various performance requirements, such as immersive- or interactive-experience applications requiring a large bandwidth, autonomous driving and vehicle-to-everything applications requiring ultra-high reliability and ultra-low latency, and applications for industrial Internet requiring massive machine-type connectivity. Facing the challenges of the post-Moore and post-pandemic era, wireless communication needs breakthroughs in network architecture to improve the intelligence, security, robustness, bandwidth, and heterogeneity. With this background, several important tendencies have emerged in the development of 6G wireless communications: 1. Future wireless networks will evolve from “human-to-human” communications into intelligent “human-to-machine” communications. In addition to enabling communications among humans, future wireless networks will be able to support close connections among humans and machines. The behavior and intent of humans will be sensed and communicated to machines that will accordingly adjust their operations. Typical scenarios include smart building, intelligent transportation, mixed reality (MR), and others. 2. Network nodes will evolve from carrying out only traditional communications to carrying out communication, sensing, computation, management, and caching in an integrated manner. To meet the diverse service requirements of mobile MR, intelligent transportation, industrial Internet of Things, and other areas, future networks will possess multiple functionalities. For example, by sensing human head position, pre-caching necessary content, and rendering high-quality images, network nodes can provide fully immersive MR experiences. In addition, with artificial intelligence (AI), network nodes can manage multi-dimensional resources in an on-demand fashion, where intent-driven network management and control can be realized. 3. Network architecture will focus on collaborations between the cloud and the network edge, which will become more heterogenous. To shorten latency and alleviate the backhaul/fronthaul burden, the network edge must collaborate with the cloud. The first method of collaboration is that the cloud finishes AI model training and then deploys AI models into the network edge, which supports the so-called edge intelligence. In the second method, users demanding high throughput are served via a cloud radio access mode, while users requiring ultra-low latency can benefit from edge computation and caching. As for architecture heterogeneity, future networks are envisioned to incorporate unmanned aerial vehicle (UAV) networks, satellite communica-tion networks, and dense cellular networks, bringing three-dimensional and hierarchical network coverage. In short, the evolution of existing 5G technolo-gies and the development of 6G need to address more stringent and diverse application scenarios, a more strict energy constraint, and the orchestration of multi-dimensional resources. These challenges call for an intellicise wireless network operation paradigm, where “intellicise” is a new adjective that we coin, standing for intelligence-endogenous and primitive-concise. Built upon the integration of AI and next-generation networking technologies, an intellicise wireless network continually explores and exploits new intelligent primitives, e.g., semantic base (Seb) in semantic communications, proactively takes sys-tematic entropy reduction as the global optimization objective, adaptively reshapes the core models of information systems, and ultimately endows itself with endogenous intelligence and primitive conciseness. In this context, the journal has organized a special feature on the theory and techniques for intellicise wireless networks. This special feature covers information theory, architecture design, and intellicise wireless networks for achieving air-space-ground-sea integration, resource management, hardware testbeds and platforms, as well as related applications. In addition, this feature is intended to provide a review of advancements and future research directions in the research field of intellicise wireless networks. After a rigorous review process, six papers have been selected for this feature, including one review article and five research articles.

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新型电光调Q腔内倍频绿光激光器

陈飞,霍玉晶,何淑芳,冯立春

《中国工程科学》 2000年第2卷第4期页码 39-42

摘要：

本文报道了一种新型的LD泵浦Nd:YVO₄-KTP电光调Q绿光激光器，用单块KTP晶体同时作为电光调Q开关和Ⅱ类相位匹配的倍频晶体，减少了腔内损耗，提高了效率，得到了脉宽为12ns

关键词： KTP 绿光激光器电光调Q开关倍频

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Q&P 工艺理念在热轧先进高强度钢中的应用研究

袁国,康健,张贺,李云杰,胡虹玲,王国栋

《中国工程科学》 2014年第16卷第1期页码 59-65

摘要：

为满足汽车工业轻量化发展要求，以Q&P（quenching & partitioning）工艺为基础的先进高强度钢受到了广泛关注，为使其在普通热连轧生产线上实现工业化并广泛应用，本文对Q&P理念在热轧工艺中的应用进行了基础研究。结果表明在传统热处理Q&P工艺中引入热变形处理后，组织细化显著，并获得了一定量的残余奥氏体。实验钢在保持较高强度的同时获得了较大的强塑积，结合目前国内热连轧生产线以超快冷系统为核心的新一代控轧控冷（TMCP）技术的应用，确定了在热连轧生产线生产热轧Q&P钢（DQ（direct quenching

关键词：先进高强度钢 Q&P DQ&P 热轧残余奥氏体

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光传送网中光监控通道信号Q值在线监测技术

唐勇,孙小菡,张明德,丁东

《中国工程科学》 2001年第3卷第12期页码 71-75

摘要：依据Q值与误码率（BER）的一一对应关系，提出了一种可在线监测OSC信号Q值的方案，并基于数字信号处理芯片（DSP）技术设计了监测模块，实现了OSC信号在线Q值监测。

关键词：光传送网（OTN）光监控通道（OSC）运行、管理和维护（OAM） Q值监测

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A rare case of B-lymphoproliferative disorder with villous lymphocytes harboring t(8;14)(q24;q32) translocation

null

《医学前沿（英文）》 2018年第12卷第3期页码 324-329 doi: 10.1007/s11684-017-0558-z

摘要：

Splenic lymphoma with villous lymphocytes (SLVL) or splenic marginal zone lymphoma with circulating villous lymphocytes is rare, and prolymphocytic transformation of SLVL is rarer. At present, only one case of SLVL with t(8;14)(q24;q32) translocation has been reported. In this study, we report a case of B-lymphoproliferative disorder with villous lymphocytes harboring t(8;14)(q24;q32) chromosome translocation that we inclined to SLVL with a prolymphocytic transformation. A 73-year-old female showed marked hepatosplenomegaly and high lymphocytosis (lymphocytes>200×10⁹/L). The abnormal lymphocytes had short coarse villi and round nuclei with prominent nucleoli. The immunophenotypes showed CD19⁺, CD20⁺, HLA-DR⁺, CD22⁺, CD5⁺, Kappa⁺, CD25^dim, CD71^dim, Lambda⁻, CD7⁻, CD10⁻, CD23⁻, CD34⁻, CD33⁻, CD13⁻, CD14⁻, CD117⁻, CD64⁻, CD103⁻, and CD11c⁻. The karyotype showed complex abnormality: 46XX,+3,−10, t(8;14)(q24;q32)[11]/46XX[⁹]. The cytoplasmic projection, immunological characteristics, and trisomy 3 chromosome abnormality supported the diagnosis of SLVL. However, the presence of prominent nucleoli and high lymphocytosis suggested prolymphocytic transformation, probably as a result of t(8,14) chromosome translocation. In this report, we described an unusual case of B-lymphoproliferative disorder with villous lymphocytes harboring t(8;14)(q24;q32) translocation, which could provide help in the diagnosis and differential diagnosis of B-lymphocytic proliferative diseases.

关键词： splenic lymphoma with villous lymphocytes splenic marginal zone lymphoma transformation chromosome translocation

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Hot deformation behavior of a novel bimetal consisting of BTW1 and Q345R characterized by processing

Pengtao LIU, Lifeng MA, Weitao JIA, Tao WANG, Guanghui ZHAO

《机械工程前沿（英文）》 2019年第14卷第4期页码 489-495 doi: 10.1007/s11465-019-0554-x

摘要： Only a few studies have been conducted on the flow behavior of the novel BTW1/Q345R bimetal, which is widely used in coal equipment. In this work, compression tests were conducted on BTW1/Q345R bimetal at a temperature range of 950 °C–1200 °C and strain rates of 0.05, 0.5, 5, and 15 s by using a Gleeble-3800 thermomechanical simulator. A constitutive equation was validated by referring to the Arrhenius equation during the characterization of hot workability. The computed apparent activation energy of the BTW1/Q345R bimetal was 360 kJ/mol, and processing maps under different strain conditions were drawn. Analysis of the stress-strain relationship revealed that work hardening exerted a dominant effect on the thermal deformation of the BTW1/Q345R bimetal. The processing maps predicted that the optimal processing interval will increase with strain. Results showed that thermal deformation of the BTW1/Q345R bimetal should proceed when the temperature range varies from 1182 °C to 1200 °C and the strain rate interval is from 4.2 to 15 s .

关键词： BTW1/Q345R bimetal constitutive equation processing map work hardening

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基于深度Q学习网络与新训练算法的服务机器人主动物品检测模型 Research Article

刘少鹏,田国会,崔永成,邵旭阳

《信息与电子工程前沿（英文）》 2022年第23卷第11期页码 1673-1683 doi: 10.1631/FITEE.2200109

摘要：因此，本文提出一种基于深度Q学习网络的AOD模型，并设计了一种新的模型训练算法。该模型旨在拟合各种动作Q值，包括状态空间、特征提取和多层感知机。

关键词：主动物品检测；深度Q学习网络；训练算法；服务机器人

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Development of barium@alginate adsorbents for sulfate removal in lithium refining

Lisa Xu, Kaifei Chen, George Q. Chen, Sandra E. Kentish, Gang (Kevin) Li

《化学科学与工程前沿（英文）》 2021年第15卷第1期页码 198-207 doi: 10.1007/s11705-020-1968-z

摘要： The demand for lithium has been steadily growing in recent years due to the boom of electric cars. High purity lithium is commonly used in the manufacture of battery grade lithium electrolyte. Sulfate residuals originating from acid leaching of lithium ores must be limited to below 20 mg·L during refining. There are methods to remove sulfate such as membrane processing and chemical precipitation using barium salts. However, membrane separation is unable to achieve the required purity while chemical precipitation often causes secondary contamination with barium and requires extra filtration processes that lead to increased processing costs. In this study, we developed a polymeric matrix entrapped with barium ions as a novel adsorbent to selectively adsorb sulfate in aqueous solutions. The adsorbent was prepared by dropwise injection method where alginate droplets were crosslinked with barium to form hydrogel microcapsules. In a typical scenario, the microcapsules had a diameter of 3 mm and contained 5 wt-% alginate. The microcapsules could successfully reduce sulfate concentration in a solution from 100 to 16 mg·L , exceeding the removal target. However, the microcapsules were mechanically unstable in the presence of an excess amount of sulfate. Hence, calcium ions were added as a secondary crosslinking agent to improve the integrity of the microcapsules. The two-step Ca/Ba@alginate microcapsules showed an exceptional adsorption performance, reducing the sulfate concentration to as low as 0.02 mg·L . Since the sulfate selective microcapsules can be easily removed from the aqueous system and do not result in secondary barium contamination, these Ca/Ba@alginate adsorbents will find applications in ultra-refining of lithium in industry.

关键词： barium@alginate microcapsules dropwise injection sulfate removal lithium