448 research outputs found
Megalinus nonvaricosus Zhou & Zhou, sp. nov.
No full textMegalinus nonvaricosus Zhou & Zhou, sp. nov. (Fig. 5A–H; Fig. 5-1A–H) Type materials. Holotype: male, CHINA: Ningxia: Xiji co. (E 105.7291, N 35.9639), Xie Chengjun collected (IZ-CAS); paratypes: CHINA: Ningxia: Haiyuan co.: Lingguangsi (E 105.6408, N 36.5633), one female, Ren Guodong collected (IZ-CAS). Description Measurements. BL= 9.8 mm, FL=5.0 mm, HL= 1.4 mm, HW= 1.2 mm, PL= 1.7 mm, PW= 1.2 mm, EL= 1.7 mm, EW= 1.5 mm. Body cylindrical (Fig. 5D), large sized. Body brown, except head darker and elytra brunneus. Legs and antennae entirely brown, except apical 1/3 of last antennomere yellowish. Maxillary and labial palpi brown. Head (Fig. 5A). Subrectangular (HL to HW ratio 1.2), temple slightly dilated, posterior angles rounded. Dorsal integument shiny, distributed with round, densely-distributed, small-sized punctures, interspaces between punctures 1–2 punctures’ diameter, except impunctate longitudinal impunctate band (0.25 mm width); also with some microstriae along posterior margin. Each side of cranium also with frontal puncture on epistoma, anterolateral puncture near antennal insertion, 3–4 small punctures on frontal region, midlateral puncture approximately a distance of 5–6 punctures’ diameter from dorsal margin of eye, temporal puncture and occipital puncture not obvious; deflexed portion of head with 2–3 rows of punctures. Frontal furrows slightly arcuate or substraight, deeper and longer than anteocular furrows; anteocular furrows of subequal length to eye, arriving line connecting rearmost of each eye. Eye of small size, near 1/3 of temple length (eye: temple = 0.30: 0.90 mm), protruding laterad. Epistoma protruding forwards, of subrectangular shape, anterior margin subtruncated. Distance between antennal insertions 0.36 mm, wider than that from antenna to eye (0.30 mm). Antennae. Scape stout, thickened apically, longer than three subsequent antennomeres combined, 0.60 mm; antennomere II elongate, 0.15 mm, equal to III; III elongate, 0.15 mm; IV and V transverse, subequal in length, 0.090 mm; last antennomere of medium length, 0.21 mm, subequal to preceding two antennomeres combined. Neck. Medium width (0.48 mm), slightly wider than 1/3 of head width. Pronotum (Fig. 5B). Subrectangular, distinctly elongated (PL to PW ratio 1.4), longer than head, but of same width. Anterior angles well-developed and slightly widened, lateral margins subparalleled or slightly sinuate, posterior angles broadly rounded. Integument shiny, microsculpture missing, micropunctures presenting. Two rows of setiferous punctures presenting on each side, admedian row consisting of 8–9 punctures; lateral row, slightly curvedly arranged, of 7–9 punctures; other irregular punctures scattered near anterior margin. Mesoscutellum. Shiny, extensively covered with distinct microstriae, and with several small, irregular punctures. Elytra (Fig. 5C). Subquadrated (EL to EW ratio 1.1), obviously wider than pronotum, but of same length. Humeri well developed, lateral margins distinctly widened posteriorly, hind margin slightly arcuate. Integument shiny and flattened, without microsculpture; each elytron with each elytron with 6–8 rows of medium-sized punctures; deflexed portion with 3–4 rows of smaller setiferous punctures. Abdomen. Cylindrical, broadest at segment VI. Tergites III–VII shiny, covered with distinctly transverse microstriae, also distributed with small setiferous punctures, interspaces between punctures near 2–3 punctures’ diameter, denser laterobasally; each tergite with impunctate basal impression which bearing obvious polygonal reticulum. Surface between two basal transverse carinae impunctate, but bearing distinct polygonal reticulum. All abdominal sternites shiny, with microsculpture and setiferous punctures as those on tergites. Male. Abdominal segment VIII entirely covered with setiferous punctures, except a narrow medial longitudinal impunctate band; posterior margins of tergite VIII slightly emarginated medially, that of sternite VIII subtruncated (Fig. 5-1A, B). Tergite IX symmetrical, connected mediobasally. Sternite IX symmetrical, with acuminate base and emarginated posterior margin (Fig. 5-1C). Tergite X symmetrical, with subtruncated base and broadly emarginated posterior margin (Fig. 5-1D), in situ broadly exposed between tergite IX. Median lobe of aedeagus oviform and oblong, medium sized (Fig. 5G, H; Fig. 5-1E, F), basal piece without transparent, membranous medial-longitudinal band; basal bulb 1.10 mm long, anterior portion subcylindrical and short (Fig. 5E, F), 0.25 mm, slightly short than 1/4 of basal bulb. Parameres symmetrical and long, slightly longer than 1/3 of basal bulb. Internal sac coiled one time at basal 1/3, extensively bearing scales. Female. Posterior margin of sternite VIII gradually sharpened backwards (Fig. 5-1G;). Genital segment medium sized (Fig. 5-1H), 0.80 mm long, sternite with slightly bisinuate basal margin, supplementary sclerites medium sized, 0.35 mm long, overlapped entire basal margin of genital sternite. Distribution. China (Ningxia). Etymology. The specific epithet is derived from the Latin words " non - "(non) and " varicosus " (variable). Remarks. This species could be distinguished from its congeners by: 1) head subrectangular, HL to HW ratio 1.2; 2) temple not obviously dilated or subparalleled; 3) head distributed with small, round punctures; 4) eye of small size, near 1/3 of temple length (eye: temple = 0.30: 0.90 mm), flattened and not protruding laterad; 5) anterior angles of pronotum slightly protruding and angulated; 6) tergites III–VII covered with superficial transverse microstriae; 7) posterior margins of tergite VIII slightly emarginated medially; 8) Internal sac coiled one time at basal 1/3, extensively bearing scales.Published as part of ZHOU, YU-LINGZI, BORDONI, ARNALDO & ZHOU, HONG-ZHANG, 2013, Taxonomy of the genus Megalinus Mulsant & Rey (Coleoptera: Staphylinidae, Xantholinini) and seven new species from China, pp. 1-66 in Zootaxa 3727 (1) on pages 19-22, DOI: 10.11646/zootaxa.3727.1.
Quantitative division of unfrozen water and pore size distribution in artificially frozen clay at extremely low temperature
No full text<p>This is the experimental dataset for the manuscript "Quantitative division of unfrozen water and pore size distribution in artificially frozen clay at extremely low temperature'.</p>
Shear-slip behaviour of prefabricated composite shear stud connectors in composite bridges
No full textThis paper has investigated the shear-slip behaviour of an innovative prefabricated composite shear stud (PCSS) connector and its application in the prefabricated steel–concrete composite bridges. A series of push-out tests are carried out on a total of 12 specimens, including 6 PCSS specimens and 6 conventional shear stud (CSS) specimens. Further comparison has been carried out between the test result and the data available from the literature. Based on the test, a high-resolution finite element (FE) analysis has been performed to reveal the load transfer mechanism of the PCSS connector at the component-level. After that, an advanced FE model has been established and validated by a full-scale test of the prefabricated composite bridge using the PCSS. With the FE model, the load-slip behaviour and slip distribution are investigated in details. The result highlights the enhanced shear capacity and ductility of the PCSS specimens compared with the CSS specimens, as well as the feasibility of PCSS connectors in composite bridges. Meanwhile, it is further revealed by the detailed investigation that the enhancement could be attributed to the lateral constraint on the concrete by the vertical steel plate in the PCSS. Besides, it is also found that the load-slip behaviour of composite bridges using the PCSS is influenced by the cracking at the seam between deck blocks. Consequently, abrupt changes can be found in the load-slip curve once the cracking occurs, which differs from the traditional composite bridges.Accepted Author ManuscriptSteel & Composite Structure
THE IMPROVEMENT OF COLLEGE STUDENTS’ ENTREPRENEURIAL AND RISK-RESISTING ABILITY UNDER THE VOCATIONAL EDUCATION REFORM UNDER POSITIVE PSYCHOLOGY
No full textA novel polyacrylamide nanocomposite hydrogel reinforced with natural chitosan nanofibers
No full textPolyacrylamide (PAM) was used as a matrix material for fabricating novel nanocomposite hydrogels reinforced with natural chitosan nanofibers (CNFs) via in situ free-radical polymerization. The nanocomposite\u27s structure, strength, morphology and rheological properties were investigated. The results showed that the CNFs had a strong interaction with PAM through hydrogen and covalent bondings. The CNFs acted as a multifunctional cross-linker and a reinforcing agent in the hydrogel system. The compression strength and storage modulus of the nanocomposite hydrogels were significantly higher than those of the pure PAM hydrogels and the corresponding PAM/chitosan semi-interpenetrating polymer network (PAM-SIPN) hydrogels. The swelling ratio (SR) of the nanocomposite hydrogels was lower than that of the PAM hydrogel, but was similar to that of the PAM-SIPN hydrogel. Among the CNF contents used, the 1.5 wt% CNF loading level showed the best combined swelling and mechanical properties for the hydrogels
Research on the Design of Museum Cultural and Creative Products under the background of new cultural and Creative culture
No full textThis paper discusses the design of museum cultural and creative products under the background of new cultural and creative culture. Through the interpretation of related concepts of new cultural and creative products, from the aspects of its content and products combined with the current development of museum cultural and creative products, summed up the design principles of museum cultural and creative products. While interpreting the relevant design principles, this paper designs cultural and creative products by combining the cultural relics collected by several museums in Hubei Province, and provides feasible and constructive ideas and methods for the design of cultural and creative products in museums by combining theory with practice
A Risk Assessment Algorithm for College Student Entrepreneurship Based on Big Data Analysis
No full textCollege student entrepreneurship is a complex and dynamic process, in which the potential risks faced by entrepreneurial enterprises are interactive and diverse. The changes in risk assessment for college student entrepreneurship are also dynamic and nonlinear and are affected by many factors, which make the risk assessment process for college student entrepreneurship quite complicated. Big data analysis technology is a new product formed under the background of cloud computing and Internet technology, which has the characteristics of large data scale, multiple data types, and strong data value and provides more technical support for the researches on the risk assessment algorithm for college student entrepreneurship. On the basis of summarizing and analyzing previous research results, this article expounded the research status and significance of the risk assessment algorithm for college student entrepreneurship, elaborated the development background, current status, and future challenges of big data analysis technology, introduced the basic principles of support vector machine (SVM) and hierarchical analytic process, constructed a risk assessment model for college student entrepreneurship based on big data analysis, analyzed the risk factors and assessment indicators of the entrepreneurial model, proposed a risk assessment algorithm for college student entrepreneurship based on big data analysis, performed the discrimination coefficient calculation and comprehensive correlation optimization, and finally conducted a case experiment and its result analysis. The study results show that the risk assessment algorithm for college student entrepreneurship based on big data analysis can effectively realize the comprehensive management of risk factors, make full use of the value of assessment parameter data, and significantly improve the accuracy and efficiency of the risk assessment for college student entrepreneurship, providing more technical support for the researches on the risk assessment algorithm for college student entrepreneurship. The study results of this article provide a reference for further researches on the risk assessment algorithm of college student entrepreneurship based on big data analysis
Research on the Design of Museum Cultural and Creative Products under the background of new cultural and Creative culture
No full textThis paper discusses the design of museum cultural and creative products under the background of new cultural and creative culture. Through the interpretation of related concepts of new cultural and creative products, from the aspects of its content and products combined with the current development of museum cultural and creative products, summed up the design principles of museum cultural and creative products. While interpreting the relevant design principles, this paper designs cultural and creative products by combining the cultural relics collected by several museums in Hubei Province, and provides feasible and constructive ideas and methods for the design of cultural and creative products in museums by combining theory with practice
Industrial energy substitution and a revised Allen elasticity in China
No full textenergy substitution, cross price elasticity, energy strategy, Q41, Q42, Q43, 能源替代, 交叉替代弹性, 能源战略,
Recent Development in Applications of Cellulose Nanocrystals for Advanced Polymer-Based Nanocomposites by Novel Fabrication Strategies
No full text- …
