248,160 research outputs found
Artimpaza brevilineata Tian & Chen, 2012 in Tian, Chen & Li 2012
No full textArtimpaza brevilineata Tian & Chen, 2012 in Tian, Chen & Li, 2012: 43, figs. 1–9. (Figs. 28a, b) Type locality: China, Yunnan, Pu’er City, Yutang. Gender: female. Date collected: 2011.V.25 (2010.V.25, in the original description, is incorrect). Collector: Li-Chao TIAN & Gui-Qiang HUANG. Paratypes: 1 female, China, Yunnan, Lincang City, 1980.VI.1, Fen LIU leg. Remarks: In the original description, the type locality is “ Yunnan, Jinghong” while it is “ Yunnan, Yutang” according to the label. “Yutang” is actually in Pu’er, not Jinghong. The first author described the type locality by mistake. In the original description, the collector was only listed as Li-Chao TIAN, which was a mistake.Published as part of Li, Zhu & Chen, Li, 2020, Primary types of longhorned beetles (Coleoptera, Cerambycidae, Vesperidae and Disteniidae) of Southwest University (SWU), pp. 25-46 in Zootaxa 4718 (1) on page 33, DOI: 10.11646/zootaxa.4718.1.2, http://zenodo.org/record/360220
Optimal beaconing control for epidemic routing in delay tolerant networks
No full textOwing to the uncertainty of transmission opportunities between mobile nodes, the routing in delay-tolerant networks (DTNs) exploits the mechanism of opportunistic forwarding. Energy-efficient algorithms and policies for DTN are crucial to maximizing the message delivery probability while reducing the delivery cost. In this contribution, we investigate the problem of energy-efficient optimal beaconing control in a DTN. We model the message dissemination under variable beaconing rate with a continuous-time Markov model. Based on this model, we then formulate the optimization problem of the optimal beaconing control for epidemic routing and obtain the optimal threshold policy from the solution of this optimization problem. Furthermore, through extensive numerical results, we demonstrate that the proposed optimal threshold policy significantly outperforms the static policy with constant beaconing rate in terms of system energy consumption savings
Adaptive decentralized control of robot manipulators driven by current-fed induction motors
No full textLeucophenga latifascia Huang, Li & Chen, 2014, sp. nov.
No full textLeucophenga latifascia sp. nov. (Figs 3 H, 8 G–I, 11 I –K, 16 A, 16 B, 33) Diagnosis. This species is similar to L. multipunctata in the male terminalia, but can be distinguished from the latter by having the paramere slightly broadened and small process apically (Fig. 33 C); katepisternum and mesopleuron brownish yellow, each with brown patches (Fig. 8 I). Description. Ocellar triangle dark brown, with 2–5 setae above ocellar setae. Frons brownish to brown. Pedicel yellowish brown; first flagellomere yellow. Clypeus brown. Palpus brownish. Mesonotum brownish yellow to brown (Fig. 8 G), sometimes with unapparent, brown longitudinal stripes (Fig. 8 H). Postpronotal lobe yellow (Fig. 8 I). Acrostichal setulae in 13–15 irregular rows (Fig. 8 G, H). Scutellum yellowish brown to dark brown, pale at tip (Fig. 8 G, H). Pleura with a brown, longitudinal stripe above (Fig. 8 I). Wing (Fig. 3 H): Costal vein between R 2 + 3 and R 4 + 5 distally with 5–8 peg-like spinules on ventral surface, and broad, brownish band diastally (Fig. 3 H). Abdominal tergites brown to black, mostly with yellow patches (Fig. 11 I–K). Male terminalia: Epandrium with pubescence and 5 setae near posterior and ventral margin per side (Fig. 33 A). Paramere broad, with 7 sensilla distodorsally and small process apically (Fig. 33 C). Aedeagus thick, with pubescence distally (Fig. 33 D). Measurements. BL = 3.60 mm in holotype (range in 4 ♂ and 5 ♀ paratypes: 3.33–3.60 mm in ♂, 2.93–3.20 mm in ♀), THL = 1.73 mm (1.53–1.73 mm in ♂, 1.33–1.50 mm in ♀), WL = 2.83 mm (2.63–3.10 mm in ♂, 2.37–2.70 mm in ♀), WW = 1.35 mm (1.17–1.38 mm in ♂, 1.05–1.18 mm in ♀), arb = 9 / 4 (6–9 / 3–4), avd = 0.81 (0.83–0.89), adf = 1.59 (1.33–1.87), flw = 1.59 (1.06–1.93), FW/HW = 0.36 (0.35–0.40), ch/o = 0.03 (0.03–0.04), prorb = 0.54 (0.47–0.58), rcorb = 0.64 (0.52–0.72), vb = 0.38 (0.31–0.55), dcl = 0.48 (0.41–0.53), presctl = 0.53 (0.43–0.59), sctl = 1.19 (1.19–1.53), sterno = 0.77 (0.54–0.86), orbito = 1.64 (1.80–2.50), dcp = 0.23 (0.21–0.31), sctlp = 1.03 (0.96–1.36), C = 2.00 (1.70–2.19), 4 c = 1.47 (1.42–1.71), 4 v = 1.78 (1.58–2.56), 5 x = 1.44 (0.94–1.33), ac = 3.53 (2.89–4.08), M = 0.64 (0.47–0.74), C 3 F = 0.92 (0.86–0.92). Type specimens. Holotype ♂ (SCAU, No. 123220), CHINA: Wangtianshu, Mengla, Yunnan, 580m, 11.ix. 2002, ex tree trunk, HW Chen. Paratypes: CHINA: 2 ♂ (SCAU, Nos 123221, 22), same data as holotype; 1 ♂ (SCAU, No. 123004), Wuyishan, Fujian, 580m, 15–19.viii. 2001, ex tree trunk, HW Chen; 1 ♂ (SCAU, No. 123223), Dabang, Jiayi, Taiwan, 800m, 15.x. 2012, ex tree trunk, HW Chen; 1 ♂ (SCAU, No. 123224), Conghua, Guangzhou, Guangdong, 200m, 3.xi. 2003, ex tree trunk, HW Chen; 1 ♂, 1 ♀ (SCAU, Nos 123225, 26), Diaoluoshan, Lingshui, Hainan, 1000m, 18.v. 2005, ex tussocks, MF Xu; 4 ♀ (SCAU, Nos 123227 – 30), Menglun, Mengla, Yunnan, 900m, 12.viii.2002, 19.iv. 2007, ex tree trunks, HW Chen; 1 ♂ (SCAU, No. 123245), Hesong, Menghai, Yunnan, 1900m, 9.iv. 2011, ex tree trunk, SJ Yan; 1 ♀ (SCAU, No. 123246), Yixiang, Puer, Yunnan, 1400m, 13.v. 2012, ex tree trunk, HW Chen; 2 ♀ (SCAU, Nos 123247, 48), Tongmai, Bomi, Xizang, 2000m, 12.x. 2010, ex tree trunks, YR Su. Distribution. China (Fujian, Taiwan, Jiangxi, Guangdong, Hainan, Yunnan, Xizang). Etymology. A combination of the Latin words “ latus ” (= broad) + “ fascia ” (= band), referring to the wing with brownish, broad band distally.Published as part of Huang, Jia, Li, Tong & Chen, Hongwei, 2014, The genus Leucophenga (Diptera, Drosophilidae), part IV: the ornata species group from the East Asia, with morphological and molecular evidence (II), pp. 1-55 in Zootaxa 3893 (1) on pages 44-45, DOI: 10.11646/zootaxa.3893.1.1, http://zenodo.org/record/28753
Bambusananus yangae Xing & Chen 2013, nom. nov.
No full text<i>Bambusananus yangae</i> Xing & Chen, nom. nov. <p> <i>Bambusananus yangae</i>, <i>nomen novum</i> for <i>Bambusananus lii</i> Yang & Chen, 2012: 50, preoccupied by <i>Bambusananus lii</i> (McKamey & Hicks, 2007)</p> <p> The new name is based on the surname of the first author of the junior homonym. Accordingly, the genus <i>Bambusananus</i> currently includes the following species: <i>Bambusananus maculipennis</i> (Li & Wang, 1993), <i>Bambusananus bipunctatus</i> (Li, 1999), <i>Bambusananus lii</i> (McKamey & Hicks, 2007), <i>Bambusananus furcatus</i> Li & Xing, 2011 and <i>Bambusananus yangae</i> Xing & Chen, <b>nom. nov.</b>.</p>Published as part of <i>Xing, Ji-Chun & Chen, Xiang-Sheng, 2013, Nomenclatural changes in the genus Bambusananus Li & Xing, 2011 (Hemiptera: Cicadellidae: Deltocephalinae: Athysanini), pp. 599-600 in Zootaxa 3635 (5)</i> on page 599, DOI: 10.11646/zootaxa.3635.5.12, <a href="http://zenodo.org/record/5262395">http://zenodo.org/record/5262395</a>
Millimeter-wave backhaul for 5G networks: challenges and solutions
No full textThe trend for dense deployment in future 5G mobile communication networks makes current wired backhaul infeasible owing to the high cost. Millimetre-wave (mm-wave) communication, a promising technique with the capability of providing a multi-gigabit transmission rate, offers a flexible and cost-effective candidate for 5G backhauling. By exploiting highly directional antennas, it becomes practical to cope with explosive traffic demands and to deal with interference problems. Several advancements in physical layer technology, such as hybrid beamforming and full duplexing, bring new challenges and opportunities for mm-wave backhaul. This article introduces a design framework for 5G mm-wave backhaul, including routing, spatial reuse scheduling and physical layer techniques. The associated optimization model, open problems and potential solutions are discussed to fully exploit the throughput gain of the backhaul network. Extensive simulations are conducted to verify the potential benefits of the proposed method for the 5G mm-wave backhaul design
Social-aware resource allocation for device-to-device communications underlaying cellular networks
No full textDevice-to-device (D2D) communication is a vital component for the next generation cellular network to bring hop gains, improve spectral reuse, and enhance system capacity. These benefits depend on efficiently solving several technical problems, among which resource allocation that shares spectrum resources between cellular users and D2D pairs is critically challenging. We propose a social-aware D2D resource sharing scheme that exploits social network properties of community and centrality for the new system design paradigm. Extensive simulations with realistic network settings demonstrate the effectiveness of our proposed scheme, which significantly improves the system performance compared to the existing schemes
Assessment of Self-Archiving in Institutional Repositories: Depositorship and Full-Text Availability
No full textThis research evaluates the success of open access self-archiving in several well-known institutional repositories. Two assessment factors have been applied to examine the current practice of self-archiving: depositorship and the availability of full text. This research discovers that the rate of author self-archiving is low and that the majority of documents have been deposited by a librarian or administrative staff. Similarly, the rate of full-text availability is relatively low, except for Australian repositories. By identifying different practices of self-archiving, repository managers can create new strategies for the operation of their repositories and the development of archiving policies
An optimal relaying scheme for delay-tolerant networks with heterogeneous mobile nodes
No full textTo provide communication services in delay-tolerant networks (DTNs) where there may exist no end-to-end paths between mobile node pairs, a variety of relaying and routing algorithms have been proposed under the assumption that the mobile nodes are homogeneously distributed in the network with the same contact rate and delivery cost. However, experimental data have revealed the heterogeneous contact rates between node pairs, and various applications of DTNs have shown that the mobile nodes often belong to different types in terms of energy consumption, communication ability, and other properties. Following the philosophy of exploiting the heterogeneous features of nodes to enhance the routing performance, we design an optimal relaying scheme for DTNs, which takes into account the nodes’ heterogeneous contact rates and delivery costs when selecting relays to minimize the delivery cost while satisfying the required message delivery probability. We use the trace-driven simulations to demonstrate the effectiveness of our optimal relaying scheme in various distributions of nodes’ delivery costs and mobility environments. Simulation results show that our proposed optimal relaying scheme requires the least delivery cost and achieves the largest maximum delivery probability, compared with the schemes that neglect or do not fully take into account nodes’ heterogeneity
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