With the concave transaction cost function more conforming to the actual situation, we introduce condition risk value to measure profolio risk, and propose mean- CVaR concave integer programming model under concave transaction costs and minimal transaction unit constraints.

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Properties of efficient portfolios and the efficient frontier to the model are systematically analyzed. Our main results concerning the properties are: every efficient portfolio can be solved by minimizing portfolio risk under a given level of portfolio return or by maximizing portfolio return under a given level of portfolio risk; on the efficient frontier, the risk is a convex and strictly increasing function of the return and the return is a concave and strictly increasing function of the risk; the utility function on the efficient frontier can be expressed as a quasi-concave function of the risk or the return if the investor's utility function is quasi-concave.

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The piezoelectric motor includes a piezoelectric member which generates a first vibration mode and a second vibration mode simultaneously by an applied power and a frictional member of which a portion is insertedly attached into a concave portion indentedly formed on one side of the piezoelectric member, wherein the frictional member is in an elliptic motion by the vibration generated by the piezoelectric member, so that an influence of the attachment of the frictional member to a resonance frequency can be minimized.

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A small indented scar left in the skin by smallpox or other eruptive disease; a ''.

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Under the condition of small angle misalignment, the effecton output beam's near-field distribution of CO2 lasers with two-dimensional axisymmetric-fold combination cavity was ascertained after analyzing and simulating beams combination output based on the axis determination of misaligned plano-concave and concave-plano-concave cavity resonator.

為了研究小角度失調(diào)對(duì)二維軸對(duì)稱－折疊組合腔CO2激光器輸出光束的近場分布的影響热久久精品日本一区二区三区，在利用矩陣?yán)碚摯_定平凹諧振腔和凹－平－凹諧振腔失調(diào)后的光軸的基礎(chǔ)上，采用光束并和思想日本中文字幕的视频网站，對(duì)輸出光束進(jìn)行了理論分析和模擬亚洲欧美日韩黄频大全。

Spikelets laterally compressed, florets several, all bisexual or lowest sterile and without a palea; rachilla glabrous, disarticulating above glumes and sterile floret and between fertile florets; glumes lanceolate, shorter than lemmas, subequal or unequal, scarious-membranous, 1–3-veined, obtuse to acuminate or aristulate; lemmas ovate-lanceolate, scarious-membranous, 3-veined, long-ciliate on lateral veins, keeled, apex setaceously bidentate with a short, often recurved awn from the sinus; palea shorter than lemma, hyaline, keels very shortly ciliate.

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The present invention includes guide shaft connected to universal shaft coupling; small box and large box clearance fitted with and fixed to the guide shaft; support rod with one end connected to the notched blocks inside the small box and large box and the other end connected to the roller and the sensor; and sensor fixed onto the installing frame and compression spring set inside the large box; and all these together with the pipe constitute one umbrella-shaped structure.

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Based on the Arcview platform and compiling programs by ourselves, the DLPM of urban area of Jinan in 1998 and 2001 is established. The main conclusions are: 1 general trend of land price is reduction from central base point to urban edge, but there are different characteristics in different direction; 2 from one edge to another, land price shows low-high-low, and its sections through urban areas show normal school and deflection normal school; 3 land price evolutes with time, concaveness land price terrace changes little or gentle or protruding, and protuberant land price terrace changes little or not, price terrace or big or gentle; 4 the increasing potential of price is analyzed by the increasing rate and increasing speed of land price.

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Inflorescence a raceme with 2 or 3(–6) spikelets, rarely a panicle with many spikelets, peduncle, axis, branches, and pedicels slender, glabrous, scabrous or pubescent along longitudinal angles, branches usually subtended by a scaly bract at base. Spikelets ± compressed at maturity, several to many florets; rachilla disarticulating below fertile florets, extended beyond palea of uppermost floret, internodes flattened or concave on side facing floret.

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Spikelets large, wedge-shaped, laterally compressed, florets several, rachilla disarticulating above glumes and between florets; glumes subequal, as long as spikelet, membranous or papery,(1–)3–9-veined; floret callus short, obtuse; lemmas herbaceous or papery, 7–9-veined, pilose on margins or all over, apex 2-lobed, lobes acute or extended into slender awns; central awn arising from sinus, flat, column short, strongly twisted, bristle straight or sparsely twisted; palea equal to or shorter than its lemma.

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