Showing papers by "Nankai University published in 1980"
TL;DR: Based on the spectral flow and the stratification structures of the symplectic group Sp(2n, C), the Maslov-type index theory and its generalization, the ω-index theory parameterized by all ω on the unit circle, for arbitrary paths in Sp( 2 n, C) are established as mentioned in this paper.
Abstract: Based on the spectral flow and the stratification structures of the symplectic group Sp(2n, C), the Maslov-type index theory and its generalization, the ω-index theory parameterized by all ω on the unit circle, for arbitrary paths in Sp(2n, C) are established. Then the Bott-type iteration formula of the Maslov-type indices for iterated paths in Sp(2n, C) is proved, and the mean index for any path in Sp(2n, C) is defined. Also, the relation among various Maslov-type index theories is studied.
87 citations
Patent•
30 May 1980TL;DR: A heald frame for looms comprises a frame structure and support members which support opposed lateral edges of the frame structure, together with vertically reciprocating drive units connected to the support members as discussed by the authors.
Abstract: A heald frame for looms comprises a frame structure and support members which support opposed lateral edges of the frame structure. The support members, together with vertically reciprocating drive units connected thereto, are installed in the loop. The frame structure is adapted to be removably attached to the support members, so that the frame structure can be simply attached to and detached from the loom. Intermediate stays are attached at suitable positions and extend between the upper and lower frame staves of the frame structure, while elastic members are disposed between the respective connecting portions of the frame staves and side stays of the frame structure.
36 citations
01 Jan 1980
17 citations
TL;DR: In this paper, a strategy for the design of multivariable self-tuning controllers of the systems with constant but unknown parameters, considering the penalizing of excessive control action and multistep cost function, is presented.
5 citations
TL;DR: In this paper, a self-tuning regulator for liquid level in the acetic acid evaporator went into formal use in April 1979; a self tuning regulator for temperature in the central part of a vinyl acetate synthesis reactor went into operation in July 1979.
3 citations
01 Jan 1980
TL;DR: The present paper describes seven newspecies of Tinginae and one new species of Cantacaderinae, both of which are closely allied to A. graciles (Fieber) and A. cooleyi Drake, but the paranota of the latter is composed of two rows of areolae com-pletely, hood extending anteriorly only to antennal tubercles and costal area.
Abstract: The present paper describes seven new species of Tinginae and one new species ofCantacaderinae. All measurements are in mm. All type specimens are kept in Nan-kai University, Tianjin. Trachypeplus yunnanus, sp. nov. Body length 3.27--3.32; antennal sagmental measurements 0.17: 0.11: 1.23: 0.33. Very similar to Trachypeplus chinensis Drake et Poor, but the body somewhatlonger, the rostrum just passing the base of mesocoxae, the hood distinct, the bound-ary nervure between subcostal and discoidal areas neither elevarted nor excavated. Holotype ? and Allotype ?: Yunnan (Xishuangbanna); Paratypes, 10? 7?:Yunnan (Xishuangbanna), 1?: Sichuan (Xichang). Ammianus quadrangulatus, sp. nov. Body length 6.6; antennal segmental measurements 0.27: 0.22: 2.37: 1.05. Separated from its congeners by the connection of 3rd and 4th antennal segmentsstraight; the paranota not very broad, only expanded laterally, not extending to apexof head, proximal part not distinctly constricted, distal half with fan-shaped markings.Holotype ?: Yunnan (Xishuangbanna). Uhlerites piceus, sp. nov. Body length 3.5; antennal segmntal measurements 0.2:0.1:1.0:0.35. Separated from its congeners by the fusco-piceous body, the 3rd antennal segmentthree times longer than the 4th, the paranota narrow, anterior angle short, only extend-ing to the base of head. Holotype ?: Sichuan (Emeishan). Dictyonota xilingola, sp. nov. Body length 3.03--3.25, antennal segmental measurements 0.15:0.11:0.81:0.27. Closely allied to Dictyonota mitoris Drake et Hsiung, but more or less smaller, hooddistinct, 3rd antennal segment broader than 4th segment, costal area of elytra nar-rower than subcostal area which is triseriate in the widest portion. Holotype ? and Allotype ?: Neimongol (Xilin Gol Meng). Acalypta spinifrousa, sp. nov. Body length 2.17, width 1.01; antennal segmental measurements 0.154:0.08:0.71:0.22. This species is closely allied to A. graciles (Fieber) and A. cooleyi Drake, but readily separated from them by the proximal end of the 3rd antennal segment in-crassated nodiformly, the hood acutely projected forward beyond eyes, the proximalend of aeytra obtusely angulated, the areolae of all areas mostly rectangular. Holotype ?: Beijing (Xiangshan). Derephysia longirostrata, sp. nov. Body length ? 3.52, ? 3.45, width ? 2.06, ? 2.04; antennal segmental measurements0.13:0.08:0.49:0.37. Very similar to Derephysis gardneri Drake et Poor in size and antennal segmentalmeasurements, but the paranota of the latter composed of two rows of areolae com-pletely, hood extending anteriorly only to antennal tubercles and costal area composedof one row of areolae. Also resembling Derephysia orata Takeya, but in the latter, thedorsal surfaee of pronotum and elytra pubescent, body size and antennal segmentalmeasurements differed. Holotype: Brachypterous ?, Shaanxi (Huashan); Allotype: ?, Shaanxi (Qin-ling). Agramma yunnanum, sp. nov. Body length ? 2.53, ? 2.94, width ? 0.7 ? 0.92; antennal segmental measurements0.27:0.17:0.7:0.35 (?). Differed from Agramma nexile (Drake) in having the head more flat, triangularprocess elongate, areolae of costal area large and quadrangular, and subcostal area near-ly upright. Distinguished from Agramma formosanum (Matmura) by the size mo-derately large, not very narrow and elongate, disk of pronotum convex, median carinaon triangular process more distinct, and subcostal area and discoidal area sharplydefined. Holotype ?: Yunnan (Xishuangbanna); Paratype 1 ?, as holotype. Malala tuberculum, sp. nov. Body length 2.15, width 1.03; length of antennal segments 0.08:0.045, 3rd and4th antennal segments wanting; head length 0.41, width 0.3 (including eyes); dia-meter of eyes 0.08, distance between eyes 0.13. Small, broad ovate, head and pronotum fusco-piceous, elytra and legs testaceous.Six head spines tuberculate, the frontal three porrect, the hind three erect. Antenni-ferous tubercles semi-spherical, fasco-piceous. Unicarinate pronotum and 6 rows ofareolae of subcostal and discoidal area of elytra distinguishly separate this new speciesfrom its congeners. Holotyp
2 citations
TL;DR: In this paper, the Al2O3−CdSe interface of a thin-film transistor was investigated in the frequency range 30 Hz-30 kHz under weak depletion and accumulation.
Abstract: The Al2O3−CdSe interface of a thin-film transistor is investigated in the frequency range 30 Hz-30 kHz under weak depletion and accumulation. The surface states are, most likely, located in the insulator Al2O3 with a concentration varying from 4·1018 to 1019 cm−3 eV−1. The surface states have a negligible influence on the thin-film transistor operation.
1 citations
TL;DR: In this paper, the influence of self-energy diagrams on the Bethe-Salpeter equation was studied by taking a gphi*//sub 1/(x)phi/sub 1/1/x/π/sub 2/x) interaction in the ladder approximation, and the results showed that for ground-state solutions the self energy diagrams will diminish the eigenvalues and alter the wave functions slightly, however, for the excited states and antisymmetric solutions, the contribution from the selfenergy diagrams is considerable, and completely alters the properties of the solutions.
Abstract: The influence of self-energy diagrams on solutions of the Bethe-Salpeter equation is studied by taking a gphi*//sub 1/(x)phi/sub 1/(x)phi/sub 2/(x) interaction in the ladder approximation The results show that for ground-state solutions the self-energy diagrams will diminish the eigenvalues and alter the wave functions slightly However, for the excited states and antisymmetric solutions, the influence of the self-energy diagrams is considerable, and completely alters the properties of the solutions Their wave functions look like a delta function and their eigenvalues are independent of the binding energy and the quantum numbers The results also show that the infrared behavior of the self-energy diagrams is very important for the solutions of the equation, and that the solutions from the ladder approximation are meaningful only in the loosely bound cases As the binding becomes tight, the contribution from the self-energy diagrams becomes important