24,757 research outputs found
On an Open Problem by Feng Qi Regarding an Integral Inequality
No full textIn the article, a functional inequality in abstract spaces is established, which gives a new affirmative answer to an open problem posed by Feng Qi in Several integral inequalities which appeared in J. Inequal. Pure Appl.
Math. 1 (2000), no. 2, Art. 19. Moreover, some integral inequalities and a discrete inequality involving sums are deduced
NOTE ON AN OPEN PROBLEM OF FENG QI
No full textABSTRACT. In this paper, an integral inequality is studied. An answer to an open problem proposed by Feng Qi is given. Key words and phrases: Integral inequality, Cauchy’s Mean Value Theorem. 2000 Mathematics Subject Classification. 26D15. In [5], Qi studied a very interesting integral inequality and proved the following result Theorem 1. Let f(x) be continuous on [a, b], differentiable on (a, b) and f(a) = 0. If f ′ (x) ≥ 1 for x ∈ (a, b), then � b (1) [f(x)] 3 � � b �2 dx ≥ f(x) dx. If 0 ≤ f ′ (x) ≤ 1, then the inequality (1) reverses. a Qi extended this result to a more general case [5], and obtained the following inequality (2). Theorem 2. Let n be a positive integer. Suppose f(x) has continuous derivative of the n-th order on the interval [a, b] such that f (i) (a) ≥ 0 where 0 ≤ i ≤ n − 1, and f (n) (x) ≥ n!, then (2) � b [f(x)] n+2 � � b dx ≥ f(x) dx a Qi then proposed an open problem: Under what condition is the inequality (2) still true if n is replaced by any positive real number r? Some new results on this subject can be found in [1], [2], [3], and [4]. We now give an answer to Qi’s open problem. The following result is a generalization o
Dataset for paper "Prediction of rail and bridge noise from concrete railway viaducts using a multi-layer rail fastener model and a wavenumber domain method"
No full textDataset supporting:
Li, Qi et al (2017) Prediction of rail and bridge noise from concrete railway viaducts using a multi-layer rail fastener model and a wavenumber domain method. Proceedings of the IMechE Part F, Journal of Rail and Rapid Transit.</span
Figure 6 in DICROTENDIPES SINICUS LIN & QI, SP. N. (DIPTERA: CHIRONOMIDAE) Abstract
No full textFigure 6. Adult male of Dicrotendipes sinicus Lin & Qi sp. n. A, antenna; B, thorax; C, hypopygium dorsal view; D, hypopygium ventral view; E, anal point lateral view; F, median volsella. First published by Qi et al. (2018), Attribution- NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0).Published as part of Lin, Xiao-Long & Qi, Xin, 2021, DICROTENDIPES SINICUS LIN & QI, SP. N. (DIPTERA: CHIRONOMIDAE) Abstract, pp. 21-32 in CHIRONOMUS Journal of Chironomidae Research 34 on page 28, DOI: 10.5324/cjcr.v0i34.4079, http://zenodo.org/record/799621
Note on an inequality of F. Qi and L. Debnath
No full textIn this paper, a similar result of F. Qi and L. Debnath's inequality is given, and a generalization of Alzer's inequality is established
An Inequality for the Ratios of the Arithmetic Means of Functions with a Positive Parameter
No full textIn the article, an integral inequality for the ratios of the arithmetic means of functions with a positive parameter are obtained, and an open problem, posed by B.-N. Guo and F. Qi in “An algebraic inequality, II, RGMIA Research Report Collection 4 (2001), no. 1, Article 8”, is resolved partially
A short note on an integral inequality
No full textIn this short note, we give a positive answer to an open problem posed by F. Qi in the paper Several integral inequalities, Journal of Inequalities in Pure and Applied Mathematics, 1 (2000), no. 2, Article 19
ANALISIS STRATEGI PEMASARAN PADA FOTOCOPY F-QI PRINT DI KOTA PRABUMULIH SUMATERA SELATAN
No full textPenelitian ini bertujuan untuk mengkaji strategi pemasaran yang diterapkan oleh usaha Fotocopy F-Qi Print yang berlokasi di Kota Prabumulih. Pendekatan yang digunakan dalam penelitian ini bersifat kualitatif dengan metode studi kasus, melalui teknik pengumpulan data berupa observasi, wawancara, dan penyebaran kuesioner. Untuk menganalisis kondisi internal dan eksternal perusahaan, digunakan metode analisis SWOT yang mencakup kekuatan, kelemahan, peluang, dan ancaman. Hasil analisis menunjukkan bahwa F-Qi Print memiliki keunggulan dalam ragam layanan dan harga yang kompetitif. Namun, kelemahan masih ditemukan pada aspek promosi digital yang belun optimal serta keterbatasan fasilitas. Peluang pengembangan usaha mencakup pemanfaatan media sosial dan pemberian diskon bagi pelanggan. Selain itu, tantangan yang dihadapi meliputi persaingan harga dan promosi agresif dari kompetitor. Hasil dari penelitian tersebut, disarankan agar F-Qi Print mengembangkan strategi pemasaran yang lebih sistematis, seperti memperkuat promosi digital dan meningkatkan mutu pelayanan guna mempertahankan daya saing di pasar lokal.
Kata Kunci: Strategi Pemasaran, SWOT, Fotocop
Figure 4 in DICROTENDIPES SINICUS LIN & QI, SP. N. (DIPTERA: CHIRONOMIDAE) Abstract
No full textFigure 4. Legs of Dicrotendipes sinicus Lin & Qi sp. n. adults. A, male fore leg, scale bar = 500 µm; B, male mid leg, scale bar = 500 µm; C, male hind leg, scale bar = 500 µm; D, female fore leg, scale bar = 500 µm; E, female mid leg, scale bar = 500 µm; F, female hind leg, scale bar = 500 µm; G, part of male fore tibia, scale bar = 50 µm; H, part of male mid tibia showing spurs and tooth-shaped combs, scale bar = 50 µm; I, part of male hind tibia showing tooth-shaped combs, scale bar = 50 µm; J, part of female fore tibia, scale bar = 50 µm; K, part of female mid tibia showing spurs and tooth-shaped combs, scale bar = 50 µm; L, part of female hind tibia showing tooth-shaped combs, scale bar = 50 µm. First published by Qi et al. (2018), Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0).Published as part of Lin, Xiao-Long & Qi, Xin, 2021, DICROTENDIPES SINICUS LIN & QI, SP. N. (DIPTERA: CHIRONOMIDAE) Abstract, pp. 21-32 in CHIRONOMUS Journal of Chironomidae Research 34 on page 26, DOI: 10.5324/cjcr.v0i34.4079, http://zenodo.org/record/799621
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