17,652 research outputs found
Ceremony - Yi Zhai, Qingfeng Zhang, Teng Zhang
No full textLL.M. graduatesYi Zhai, Qingfeng Zhang, and Teng Zhang receive their hoods.https://scholarship.kentlaw.iit.edu/commencement_2013/1082/thumbnail.jp
Amblyomma hainanense Teng 1981
No full text53. Amblyomma hainanense Teng, 1981. Oriental: 1) China (south) (Teng & Jiang 1991). Amblyomma hainanense was treated as a synonym of Amblyomma helvolum in Kolonin (2009). This opinion was accepted by Sun et al. (2016) and probably by Chen et al. (2010), Zhang et al. (2019), Zhang Y.K. et al. (2019) and other Chinese workers, who listed Amblyomma helvolum but not Amblyomma hainanense in their studies of ticks present in China. No type comparisons were provided to support this synonymy; consequently, Amblyomma hainanense is treated as provisionally valid in Guglielmone et al. (2010b, 2020) and here, pending that comparison.Published as part of Guglielmone, Alberto A., Nava, Santiago & Robbins, Richard G., 2023, Geographic distribution of the hard ticks (Acari: Ixodida: Ixodidae) of the world by countries and territories, pp. 1-274 in Zootaxa 5251 (1) on page 49, DOI: 10.11646/zootaxa.5251.1.1, http://zenodo.org/record/770419
Hybrid Linear Modeling via Local Best-fit Flats
No full text1 online resource (PDF, 18 pages, includes illustrations)Zhang, Teng; Szlam, Arthur; Wang, Yi; Lerman, Gilad. (2010). Hybrid Linear Modeling via Local Best-fit Flats. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/180998
Analyzing Assessment Methods of Renewable Energy Technology on Green Building: Four-aspect criteria assessment method
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Novel fuzzy logic controllers with self-tuning capability
No full textTwo controllers which extend the PD+I fuzzy logic controller to deal with the plant having time varying nonlinear dynamics are proposed. The adaptation ability of the first self tuning PD+I fuzzy logic controller (STPD+I_31) is achieved by adjusting the output scaling factor automatically thereby contributing to significant improvement in performance. Second controller (STPD+I_9) is the simplified version of STPD+I_31 which is designed under the imposed constraint that allows only minimum number of rules in the rule bases. The proposed controllers are compared with two classical nonlinear controllers: the pole placement self tuning PID controller and sliding mode controller. All the controllers are applied to the two-links revolute robot for the tracking control. The tracking performance of STPD+I_31 and STPD+I_9 are much better than the pole placement self tuning PID controller during high speed motions while the performance are comparable at low and medium speed. In addition, STPD+I_31 and STPD+I_9 outperform sliding mode controller using same method of comparison study
sj-docx-1-hol-10.1177_09596836231183060 – Supplemental material for New evidence of prehistoric human activity on the central Tibetan plateau during the early to middle Holocene
No full textSupplemental material, sj-docx-1-hol-10.1177_09596836231183060 for New evidence of prehistoric human activity on the central Tibetan plateau during the early to middle Holocene by Leibin Wang, Haiwei Zhang, David D Zhang, Hai Cheng, Shengda Zhang, Teng Li, Yue Zhang, Xiaoqing Wang, Zhifeng Wu, Yafeng Wang and Fahu Chen in The Holocene</p
Tecmerium yunnanense Teng & Wang 2018, sp. nov.
No full textTecmerium yunnanense sp. nov. (Figs 1, 5, 9, 13) Diagnosis. Tecmerium yunnanense sp. nov. is similar to T. scythrella (Sinev, 1986) in the male genitalia by sharing a wider rectangular gnathos, a juxta broadly concave in triangle on the anterior margin, and a sclerite of the phallus bifurcate apically. It can be separated from T. scythrella in the male genitalia by the eighth sternum with posterior 1/3 sclerotized (Fig. 9), and the two apical processes of the sclerite of the phallus unequal in length (Figs 5, 5b); in the female genitalia by having a signum (Fig. 13). In T. scythrella, the eighth sternum is sclerotized in posterior half (Fig. 10), the two apical processes of the sclerite of the phallus are equal in length (Figs 6, 6b) in the male genitalia; and the signum is absent in the female genitalia (Sinev, 1986: fig. 18). Description. Adult (Fig. 1) forewing length 5.5–6.5 mm (n = 6). Head grayish brown, mixed with dark brown, scales tipped with grayish white. Antenna with scape grayish white on ventral surface; grayish brown on dorsal surface except part scales tipped with grayish white, anterior margin grayish white; pecten brown, grayish white at tip; flagellum dark brown, ciliated on ventral surface in male. Labial palpus brown, part scales tipped with grayish white; second segment grayish white at apex; third segment slightly shorter than second, pointed apically. Haustellum grayish brown. Thorax and tegula brown, mixed with pale gray or grayish white tipped scales. Forewing pale grayish brown, scales tipped with grayish white, distal half mixed with brown and dark brown scales, apex dark brown; humeral patch dark brown; costa black, intermixed with grayish white tipped scales, with two costal spots respectively extending to upper margin of cell: one dark brown, subquadrate, at basal 1/3, another brown mixed with dark brown scales, elongate oval, ranging from middle to distal 1/3; fold with a narrow rectangular dark brown spot before middle; discal, discocellular and tornal spots dark brown, tornal spot oval and connected with discocellular spot; dorsum with a brown stripe before middle, extending obliquely to below discal spot; fringe brown, intermixed with grayish white tipped dark brown scales, dark brown around apex. Hindwing and fringe pale grayish brown, becoming darker from base to apex. Legs with dorsal surface grayish white; ventral surface dark brown, part scales tipped with grayish white, all tibiae and tarsomeres grayish white at apex. Male genitalia (Figs 5, 9). Eighth sternum with posterior 1/3 weakly sclerotized, forming a sub-rectangular plate (Fig. 9). Uncus broad at base, slightly narrowed to a rounded apex, distal half setose and longitudinally keeled on ventral surface. Gnathos rectangular, slightly convex on posterior margin, straight on anterior margin; lateral arms narrow, basally fused with tegumen. Upper division of valva sub-quadrate in basal half, clubbed in distal half, rounded apically, setose in distal 4/5; proximal flange narrow lunate. Lower division of valva broad, sub-rectangular; apex rounded, setose, with a finger-like dorsoapical process; sacculus with basal 2/3 broad, approximately 1/2 width of valva, distal 1/3 equally narrow, distal 3/5 setose. Juxta triangular, concave inward broad triangularly on anterior margin. Vinculum narrow laterally, median portion anteriorly extended sub-trapezoidally, posteriorly with a small sclerotized circular plate (Fig. 5a). Phallus approximately 1.5 times length of valva, curved ventrad, dilated spherically at base; internal sclerite curved ventrad, bifurcate at apex, forming two spine-like processes unequal in length (Fig. 5b); anellus with a few microsetae. Female genitalia (Fig. 13). Apophyses posteriores approximately two times length of apophyses anteriores. Eighth segment with both sternum and tergum nearly straight on posterior margin, setose in posterior half; sternum concave triangularly and tergum concave semicircularly on anterior margin. Seventh sternum and tergum nearly straight on posterior margin. Ostium bursae placed at middle of intersegmental membrane between seventh and eighth segments. Ductus bursae approximately three times length of corpus bursae, constricted at basal 2/7 near inception of ductus seminalis, distal 1/7 gradually broadened towards corpus bursae; internal wall with granules from basal 1/3 to distal 1/7 on one side, with dense granules in entire distal 1/7. Corpus bursae rounded, with granules on internal wall; signum elongate oval, weakly sclerotized, with three heavily sclerotized triangular plates transversely (Fig. 13a). Material examined. Holotype ♂, Qiunatong Village (28.10°N, 98.57°E; elev. 1767 m), Bingzhongluo Town, Gongshan County, Nujiang State, Yunnan, China, 16 June 2017, coll. Kaijian Teng et al., slide No. TKJ17342. Paratypes (4♂ 1♀). 1♂ 1♀, 14‒17 June 2017, others same as holotype; 2♂, Taiyanghe Nature Reserves (elev. 1450 m), Yunnan, China, 22 May‒ 11 June 2014, coll. Zhenguo Zhang; 1♂, Mt. Weibao (elev. 2244 m), Weishan County, Yunnan, China, 23 July 2013, coll. Shurong Liu, Yuqi Wang and Kaijian Teng. Distribution. China (Yunnan). Etymology. The specific epithet of this species is derived from the type locality, Yunnan.Published as part of Teng, Kaijian & Wang, Shuxia, 2018, Genus Tecmerium Walsingham (Lepidoptera: Blastobasidae) new to China, with descriptions of two new species, pp. 420-428 in Zoological Systematics 43 (4) on pages 421-424, DOI: 10.11865/zs.201836, http://zenodo.org/record/461709
Noncausal explicit model predictive control of wave energy converters
No full textWave energy is a promising renewable energy source, but its commercial utilisation is low compared to wind and solar energy. This paper proposes an explicit model predictive control (EMPC) strategy to reduce the high computational burden associated with online computation. Realistic wave data collected from the coast of Cornwall, UK, together with realistic single-point absorber parameters, are utilised. The dynamic response of the floating system is controlled, and a disturbance observer and an autoregressive model are designed for wave prediction. This paper aims to identify the most effective strategy to achieve optimal trajectory tracking, rapid prediction, efficient optimisation, and maximum energy capture. The results of numerical simulations show impressive effects of trajectory tracking, wave prediction, and maximum energy capture, with rapid prediction and low computational demand. These results demonstrate the effectiveness of the proposed EMPC method in wave energy converters (WECs)
An experimental investigation of aerodynamic and aeroacoustic performance of a wind turbine airfoil with trailing edge serrations
No full textTrailing edge (TE) serrations are widely used as an effective passive control method to reduce the turbulent TE noise from wind turbine blades. Other than the acoustic effects, the aerodynamic performance of serrations is also an important issue that should be considered, since it determines the power output of the blade. To this end, the far-field sound pressure level, flow field, and aerodynamic force of the serrated airfoil were measured in an anechoic wind tunnel, and the lift increase and noise reduction effects of the TE serrations were comprehensively evaluated. The result showed that the presence of TE serrations could achieve noise reduction by about 2 dB at the low-to-moderate frequency range at small angles of attack, and meanwhile it could suppress the fluctuation of aerodynamic forces. In addition, the proper orthogonal decomposition method was deployed to decompose the wake flow into various vortex structures with different portions of turbulent kinetic energy so as to reveal the noise reduction mechanism of the serrated TE. The result suggested that TE serrations could effectively inhibit large-scale vortex structures that shed from the boundary layer on the suction side, thereby achieving noise reduction around the vortex shedding frequency
High performance triboelectric nanogenerators with aligned carbon nanotubes
No full textAs the essential element of a triboelectric nanogenerator (TENG), friction layers play key roles that determine the device performance, which can be enhanced by material selection and surface modification. In this work, we have embedded aligned carbon nanotubes (CNTs) on the polydimethylsiloxane (PDMS) surface as the effective dielectric layer to donate electrons. This layer not only increases the electron generation for the output, but also shows notable stretchability. The length and the properties of the aligned CNTs can be controlled precisely. Using the 40 mu m CNT as an example, the fabricated CNT-PDMS TENG shows an output voltage of 150 V and a current density of 60 mA m(-2), which are 250% and 300% enhancement compared to the TENG using directly doped PDMS/multiwall carbon nanotubes, respectively. The maximum power density of this TENG reaches 4.62 W m(-2) at an external load of 30 MO. The TENG has demonstrated superior stability during cyclic measurement of over 12 000 cycles. Besides, the aligned CNT-PDMS film shows superhydrophobicity (154 degrees) and good sheet resistance of 280 Omega sq(-1). This stretchable aligned CNT-PDMS film can be universally utilized as a positive triboelectric layer pairing with polymeric materials such as polyethylene terephthalate, polyimide, PDMS and polytetrafluoroethylene for TENGs. This work provides an effective method of structure design for flexible and stretchable nanogenerators.Shenzhen Government Competitive Research Grant [JCYJ20140419131807791, KQCX20130628093909155]; National Natural Science Foundation of China [61504004, 61674004, 61176103, 91323304]; National Key R&D Project from the Ministry of Science and Technology, China [2016YFA0202701]; Beijing Science & Technology Project [Z141100003814003, D151100003315003]; Beijing Natural Science Foundation of China [4141002]SCI(E)[email protected]; [email protected]
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