6,601 research outputs found
FIGURES 3–5. Scutellar shield. 3 in A new species of Dascillus Latreille (Coleoptera: Dascillidae) from Hubei, China
No full textFIGURES 3–5. Scutellar shield. 3. Dascillus attenuatus Jin et al., 2017, male; 4. D. emarginatus sp. nov., male; 5. D. emarginatus sp. nov., female.Published as part of Fu, Yuting, Jin, Zhenyu & Wu, Gang, 2023, A new species of Dascillus Latreille (Coleoptera: Dascillidae) from Hubei, China, pp. 578-584 in Zootaxa 5239 (4) on page 580, DOI: 10.11646/zootaxa.5239.4.8, http://zenodo.org/record/763537
FIGURES 6–9 in A new species of Dascillus Latreille (Coleoptera: Dascillidae) from Hubei, China
No full textFIGURES 6–9. Dascillus emarginatus sp. nov. 6. abdomen, female; 7. abdomen, male; 8–9. apex of ventrite 5, female.Published as part of Fu, Yuting, Jin, Zhenyu & Wu, Gang, 2023, A new species of Dascillus Latreille (Coleoptera: Dascillidae) from Hubei, China, pp. 578-584 in Zootaxa 5239 (4) on page 580, DOI: 10.11646/zootaxa.5239.4.8, http://zenodo.org/record/763537
FIGURES 13–24. 13–22 in A new species of Dascillus Latreille (Coleoptera: Dascillidae) from Hubei, China
No full textFIGURES 13–24. 13–22. Dascillus emarginatus sp. nov.; 23–24. D. attenuatus Jin et al., 2017. 13–20, 23. aedeagus in ventral view; 21. aedeagus in dorsal view; 22, 24. aedeagus in lateral view.Published as part of Fu, Yuting, Jin, Zhenyu & Wu, Gang, 2023, A new species of Dascillus Latreille (Coleoptera: Dascillidae) from Hubei, China, pp. 578-584 in Zootaxa 5239 (4) on page 581, DOI: 10.11646/zootaxa.5239.4.8, http://zenodo.org/record/763537
su-Based Shaft Friction Design Method and Evaluation for Pipe Pile
No full textThe shaft friction in clay is essential to bearing capacity of pipe piles. Reasonable selection of design methods and parameters is very important for offshore piles. This paper focuses on the current popular vertical load design methods based on undrained strength for pipe piles, especially for offshore piles. Based on the database, the accuracy and reliability of various pile design methods based on undrained strength su in clay were reviewed. The small-scale model tests were conducted to evaluate su-based methods. For the shortcomings of small-diameter piles in the database, a field test of full-scale offshore pile was carried out and analysed. By comparing the calculated and the measured capacity for each method, the reliability of various design methods is evaluated for large-diameter piles. For the design methods based on undrained strength, it demonstrates the importance and reliability of the determination of undrained strength parameters. In view of the vertical loading conditions of offshore large-diameter steel pipe piles, reasonable suggestions for design methods and parameters determination are given
FIGURES 25–28. 25–26 in A new species of Dascillus Latreille (Coleoptera: Dascillidae) from Hubei, China
No full textFIGURES 25–28. 25–26. Dascillus emarginatus sp. nov.; 27–28. D. attenuatus Jin et al., 2017. 25, 27. male abdominal sternite IX; 26, 28. male abdominal tergites IX–X.Published as part of Fu, Yuting, Jin, Zhenyu & Wu, Gang, 2023, A new species of Dascillus Latreille (Coleoptera: Dascillidae) from Hubei, China, pp. 578-584 in Zootaxa 5239 (4) on page 582, DOI: 10.11646/zootaxa.5239.4.8, http://zenodo.org/record/763537
含软弱夹层的强风化泥岩强度及破坏模式试验研究
No full textIn order to investigate the effects of weak interlayer on slope instability, theoretical and experimental studies on the strength and the failure mode of rock containing weak interlayer were conducted. Three types of triaxial specimens of strongly weathered mudstone, muddied interlayer, and mudstone with the weak interlayer were prepared by using the core specimens of a slope borehole, and the triaxial consolidation undrained shear tests were conducted, respectively. Combined with the theoretical analysis, the strengths and failure modes of the strongly weathered mudstone, the muddied interlayer and the mudstone with weak interlayer were studied, and the influence laws of the interlayer angle and the confining pressure on the strengths and failure modes of specimens were revealed. The results show that the stress-strain curves of the strongly weathered mudstone and the muddied interlayer are strain-softening type and strain-hardening type, respectively. There exists a critical inclination angle range for specimens containing the weak interlayer. When the interlayer angle is within the range, the failure surface occurs in the weak interlayer. When the interlayer angle is outside the range, specimens undergo global shear damage. When the confining pressure exceeds 0.4 MPa, the confining pressure has no effect on the failure mode of specimens containing the weak interlayer.</p
Study on visualization and failure mode of model test of rock-socketed pile in soft rock
No full textComputed tomography (CT) technology is a kind of nondestructive image reconstruction technology. CT visualization technology is introduced into the physical model test of a single pile, which can visualize a rock-socketed pile in soft rock under different pile top loads. In this article, the visualization process of a model test of a rock-socketed pile in soft rock is carried out by medical CT. The implementation procedure, the composition of the device, and the technical requirements of the test equipment, as well as the CT scanning operation of nondestructive visualization technique of the single pile model test, are introduced in detail. The influence of a marked layer setting, side wall effect, size of the model cylinder, and model pile on the visualization effect of a single pile model test is discussed. The feasibility and reliability of the model test visualization technology of a rock-socketed pile in soft rock are demonstrated by examples, and the failure mode of rock-socketed pile in soft rock is intuitively revealed to be the spherical cavity expansion mode of the pile end.</p
Fu Describing About the Author Himself: A Focus on Ban Gu "You tong fu"
No full textFrom Later Han dynasty onwards, the number of fu describing about the author himself has increased. There are several possible reasons for this, but the most important reason is probably that there was no other genre through which one could express oneself except for fu in this period. For instance, the fiveword poetry was still in the middle way of establishing its own style at that moment. Moreover, in Former Han, there were few opportunities for authors to talk about themselves in detail in fu, because the main readers were emperors and kings of countries. In Later Han, the readers had become more diverse. That is probably the reason why more fu began to mention about the authors themselves in this period. Ban Gu (32-92), who is a representative scholar of Later Han and also a man of letters, expressed his aim by writing "You tong fu". Its main content is that though one's encounter with a disaster or felicity is not always derived from our behavior, we have to have a strong will and take action to overcome disasters. This idea is supported by Ban Gu's experiences of not attaining his aim. Such experiences are common in Chinese authors. One of the earliest examples is Chu Ci. Also, Chu Ci is the one of the origins of fu. It is surprising that authors expressed things about themselves mostly in fu describing journeys. It may be easier to understand this tendency if we think they substituted the heaven wander in Chu Ci with a ground journey. Chu Ci was a model for authors to express their aim which could not come true, even if the journey on the ground and the wander in heaven are different
Dascillus emarginatus Fu & Jin & Wu 2023, sp. nov.
No full textDascillus emarginatus sp. nov. (Figs 1–2, 4–9, 11–22, 25–26, 29–31) Type material. Holotype ♁: China, Hubei, Shennongjia, Dongxi Attendance Centre, 1-vi-2020, Ping Wang lgt. Paratypes: 14 ♁, 9 ♀, same data as holotype; 1 ♀, China, Hubei, Shennongjia, Dongxi Attendance Centre, 1-vii-2019, Ping Wang lgt. Description. Male (Fig. 2). Length 17.2–18.3 mm, width 5.6–5.9 mm. Body 3.0–3.2× longer than broad. Head, antennae, pronotum, scutellar shield and venter black, elytra and legs dark brown. Elytral feebly shiny, glabrous. Head, scutellar shield and pronotal margin setae brown, not forming colour pattern, venter covered by dense brown pubescence. Head. Antennae reaching middle of elytra. Antennomere 3 about 2.5–2.6× as long as broad, 1.1–1.2× as long as antennomere 4; ultimate antennomere distinctly longer than penultimate. Mandible strongly curved apically; incisor edge with two teeth. Apical palpomere of both maxilla and labium weakly expanded. Pronotum trapezoidal, 0.5–0.6 × as long as wide, widest just before base; sides sinuate. Lateral carina narrowly explanate with marginal bead, edge smooth with distinct fringe of setae; anterior angles broadly rounded. Disc strongly convex, punctation coarse and dense. Pterothorax. Scutellar shield 0.9–1.0 × as long as wide, emarginate anteriorly, acute posteriorly (Fig. 4). Elytra moderately convex, together 2.3–2.4 × as long as wide, 4.4–4.5 × as long as pronotum. Abdominal ventrites (Fig. 7) with glabrous spots on each side; ventrite 5 distinctly projecting apically, 0.4–0.5 × as long as wide, 1.1–1.2 × as long as ventrite 4. Sternite IX (Fig. 25) apically strongly emarginate, at base slightly emarginate, bearing uniformly short setae in middle and apical part. Posterior edge of tergite IX (Fig. 26) also emarginate. Tergite X shorter than tergite IX, apically obtuse. Aedeagus (Figs 13–22). Phallobase emarginate at base. Parameres longer than phallobase, inner margin upturned apically, slender and narrowly rounded at apex. Apex of ventral lobe obtuse; dorsal lobe also narrowly rounded at apex. Female (Figs 1, 29). Externally identical to male. Length 18.8–20.3 mm, width 5.6–6.0 mm. Head, antennae, pronotum, scutellar shield and venter dark brown; apex of ventrite 5 obviously emarginate in middle (Figs 6, 8–9). Female spiculum ventrale slightly emarginate apically (Fig. 11), genitalia weakly sclerotised with vagina and bursa copulatrix not clearly separated; bursa copulatrix without sclerites; spermatheca small and not sclerotised. Ovipositor (Fig. 12) short; paraprocts entirely sclerotised, without baculi, slightly shorter than gonocoxites; proctiger absent; gonocoxites entirely sclerotised ventral of paraprocts, triangular and strongly bent, apices prominent, densely setose dorsally, without baculi; gonostyli absent. Differential diagnosis. At first glance, the new species is very similar to D. attenuatus Jin, Xie & Zhu, 2017, however, it can be easily distinguished from the latter by the combination of the following characters: body length over 17 mm, scutellar shield emarginate anteriorly (Figs 4–5); abdominal ventrites with glabrous spots on each side in both genders (Figs 6–7); ventral lobe of aedeagus broadly rounded apically; sternite IX apically strongly emarginate (Fig. 25); apex of female ventrite 5 obviously emarginate in the middle (Figs 6, 8–9); spiculum ventrale also emarginate at apex (Fig. 11). While in D. attenuatus: body length less than 17 mm, scutellar shield truncate anteriorly (Fig. 3); abdominal ventrites without glabrous spots on each side; apex of ventral lobe distinctly acute in the middle (Fig. 23); sternite IX apically slightly emarginate (Fig. 27); apex of female ventrite 5 broadly rounded; spiculum ventrale truncate at apex (Fig. 10). Remarks. The shape of the aedeagus is one of the characters frequently used for the identification of Dascillus taxa (Fang et al. 2020, Jin et al., 2013). Recently, Terzani et al. (2017) detected that this character was not constant or specific for the Western Palaearctic dascillids. However, unlike in the widespread European species, we have not found any significant variation in the morphology of aedeagus in a series of eight males of D. emarginatus sp. nov. and three males of D. attenuates. Therefore, we consider the shape of ventral lobe as a constant character with other diagnostic characters to separate the new species from D. attenuatus. Collection circumstances. Like other species of Dascillus in Shennongjia, males of D. emarginatus sp. nov. were observed feeding on pollen of Castanea sp. (Fagales: Fagaceae) while females suspending on the leaves of nearby unidentified plants in Dongxi Attendance Centre (Figs 29–30). Etymology. The species name refers to the apex of females’ ventrite 5 obviously emarginate in the middle, distinguished D. emarginatus sp. nov. from all other known Dascillus spp; the name is an adjective. Distribution. So far known only from the type locality in Shennongjia Nature Reserve, Hubei Province, China (Fig. 31).Published as part of Fu, Yuting, Jin, Zhenyu & Wu, Gang, 2023, A new species of Dascillus Latreille (Coleoptera: Dascillidae) from Hubei, China, pp. 578-584 in Zootaxa 5239 (4) on pages 579-583, DOI: 10.11646/zootaxa.5239.4.8, http://zenodo.org/record/763537
Vertical bearing characteristics of rock-socketed pile in a synthetic soft rock
No full textUsing the model test technology of the rock-socketed pile in soft rock in consideration of the influence of the overburden, the physical model test with different overburden pressure and different rock-socketed depth is carried out. The vertical bearing mechanism and law of the rock-socketed pile in soft rock are analysed through the results of axial force distribution, shaft resistance distribution, load sharing ratio of shaft resistance and base resistance, shaft resistance relationship between shaft resistance and displacement, and relationship between base resistance and displacement, etc. Based on the accurate qualitative analysis of indoor model test results, and combined with the measured data and engineering experience at home and abroad, the vertical bearing characteristics of the rock-socketed pile in soft rock are comprehensively interpreted, and the vertical bearing mechanism and its influencing factors of the rock-socketed pile in soft rock are revealed.</p
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