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Review of Leptocimbex formosanus group (Hymenoptera: Cimbicidae) with two new Chinese species
Yuchen Yan,Gengyun NIU,Bocheng LAN,Meicai Wei 한국곤충학회 2018 Entomological Research Vol.48 No.5
Leptocimbex formosanus group of Leptocimbex Semenov 1896, Cimbicidae is defined and the relationships and characteristics are provided. Two new species of this group are described from Hunan and Yunnan Provinces in China: Leptocimbex shinoharai Yan & Wei sp. nov. and L. naitoi Yan & Wei sp. nov. Redescriptions of the three known species of L. formosanus group (L. formosanus Enslin 1911, L. dendrobii Rohwer 1915 and L. nigropropodea Wei & Deng 2002) and a key to all known species of this group are provided.
Chenhang Yan,Wei Zhang,Xiaohang Li,Yuchen Qian 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.11
In this paper, we investigate the problem of observer-based time-varying leader-following formation tracking for multi-agent systems with the one-sided Lipschitz and quadratic inner- boundedness nonlinear dynamics.An idea of the observer-based protocol with an edge-based adaptive law is designed for nonlinear systems, which enable agents to achieve a desired formation tracking when it cannot obtain the full state of the nonlinear system. In contrast to the previous nonlinear formation systems, the advantage of the developed method is that it is less conservative and more general for the nonlinear system with large Lipschitz constants. Besides, under the proposed adaptive law, the design of the protocol does not rely on the known communication topology. Finally, the simulation results for one leader and six followers are proposed to show the feasibility and effectiveness of the proposed method in the nonlinear time-varying formation system.
Yalan CHENG,Yuchen Yan,Mei-Cai WEI,Gengyun NIU 한국곤충학회 2021 Entomological Research Vol.51 No.6
Three new species of Leptocimbex, L. praiaformis, L. clavicornis, and L. yanniae, from China were described and illustrated. Nearly complete mitochondrial genomes were sequenced using next-generation sequencing. Compared to the ancestral organization, four tRNA genes were rearranged: trnM (+) and trnQ () are shuffled, while trnC ()andtrnY () are translocated from the trnW-trnC-trnY cluster to a location upstream of trnI. By mapping gene order onto phylogenies estimated from the mitochondrial genome, the evolutionary histories of gene rearrangement traits can be deciphered. All protein-coding genes are initiated by ATN codons and terminated with TAN, or T codons. By labeling the mutation on predicted secondary structures of rRNAs, the highly conserved motifs of rrnS (H769, H921, H939, H1506) also show phylogenetic signals. Phylogenetic relationships among the Symphyta were reconstructed using mitogenomes. Both maximum likelihood and Bayesian inference analyses highly support the monophyly of the genus Leptocimbex and the sister-group relationship between Leptocimbex and Labriocimbex + Trichiosoma.
Yu Chen,Shengyuan Yan,Cong Chi Tran 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.2
Mental workload (MWL) is a major consideration for the user interface design in nuclear power plants(NPPs). However, each MWL evaluation method has its advantages and limitations, thus the evaluationand control methods based on multi-index methods are needed. In this study, fuzzy comprehensiveevaluation (FCE) theory was adopted for assessment of interface designs in NPP based on operators'MWL. An evaluation index system and membership functions were established, and the weights weregiven using the combination of the variation coefficient and the entropy method. The results showed thatmulti-index methods such as performance measures (speed of task and error rate), subjective rating(NASA-TLX) and physiological measure (eye response) can be successfully integrated in FCE for userinterface design assessment. The FCE method has a correlation coefficient compared with most of theoriginal evaluation indices. Thus, this method might be applied for developing the tool to quickly andaccurately assess the different display interfaces when considering the aspect of the operators' MWL.