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1

Complementing and enhancing definitions of line profile composite tolerance imposed by ISO geometrical product specification

Yan Y., Bohn M.

Journal of Machine Engineering

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2018

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Vol. 18, No. 2

74--84

EN

According to the ISO Geometrical Product Specifications (GPS), if two or more specifications of the same characteristic are to be indicated, they may be combined as a composite tolerance. Therefore there are no definition differences between the single separate tolerance indicators and their composite tolerance, which is different from the ASME standards. Hereby, the definitions of the combined tolerance which specifies the additional location, orientation and form of tolerance zone are not explicitly defined in the current ISO. It restricts the required definitions of tolerance specifications of a component which are often utilized in practice. However, the required definitions cannot be notated in the technical drawings by using the ISO semantics, because the ISO definitions are insufficient. It causes definition gaps and misinterpretations. This paper focuses on developing the definitions of line profile composite tolerance and suggests a new approach for explicitly defined and function-oriented systematology of line profile composite tolerance. This research is based on the analysis of physical behaviour of geometric feature of a component on a theoretical level. Completed and enhanced definitions in an improved systematology for line profile composite tolerance is formulated which fills the definition gaps and eliminates the deficits in ISO GPS.

2

Analysis of recent coastline evolution due to marine reclamation projects in the Qinzhou Bay

Yan Y., Zhang Z., Wang C., Zhang L., Huang Y., Zhang J.

Polish Maritime Research

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2017

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S 2

188--194

EN

Intense marine reclamation activities bring obvious benefits, meanwhile, these activities also influence the coastal natural formation, hydrodynamic processes and water environment etc. In order to investigate the exact influence in the Qinzhou Bay brought by marine reclamation behaviors in recent years, based on the remote sensing image data in the Qinzhou Bay in 2006, 2008, 2009, 2012 and 2014, with the help of GIS and RS software, the thesis interprets Qinzhou Bay coastline and artificial reclamation by man-machine interaction and makes quantitative analysis in the Qinzhou Bay coast evolution recently. The results show: (1) Qinzhou Bay coastal morphology change degree was strong in 2006 - 2012 and the coastline changed greatly. Originally part of the natural shore segments which had twists and turns were gradually filled into artificial coast, the coast constantly advanced to the sea, coastline became regular and straight; (2) The change degree of coastline was relatively small in 2006-2008, the average artificial coastline increased 8.86 km/a, the average artificial reclamation area was 20.79 km2 /a; in 2008-2012, the change range of coastline was the greatest, coastline changed most severely, the average artificial coastline increased 16.07 km/a, the average artificial reclamation area was 58.52 km2 /a; however, in 2012-2014, coastline change degree relatively slowed, the average artificial coastline increased 4.04 km per year, the average artificial reclamation area was 3.464 km2 /a. (3) Compared to the studies of predecessors, the innovation of this paper is that it is the first to carry out the detailed research on coastline evolution caused by reclamation engineerings of the Qinzhou Bay, then formed the change results on coastline that caused by intense human activities in the Qinzhou Bay, provided the area of the marine environment protection with full and accurate data.

3

Limitations of notation system in centred part alignment accuracy imposed by ISO standard and proposal for an improved methodology

Yan Y., Bohn M.

Journal of Machine Engineering

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2017

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Vol. 17, No. 2

90--101

EN

According to the ISO Geometrical Product Specifications (GPS), centred part alignment with one centred point can be described clearly using technical drawings. There are two main limitations of this standard; Firstly: the uncertainty over use of notations in technical drawings when more than one centred point is applied, and secondly, the use of fixed datum targets to centred points which causes an unstable alignment process. This article suggests a new approach for a functional, explicitly defined notation system of datums and datum systems based on the research of orientation constraints between datums. This new approach simplifies the technical drawing, thereby eliminating notation uncertainties. An improved methodology for a stable alignment process was developed based on physical analysis of the centred part alignment which implements movable datum targets.

4

Study on the Photochromic Properties of Coloured Luminous Fibres Based on PA6

Yan Y., Zhu Y., Ge M.

Fibres & Textiles in Eastern Europe

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2016

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Vol. 24, no. 3 (117)

38--43

EN

Coloured PA6 luminous fibres were prepared by adding luminous material and inorganic pigments. The morphology and optical properties of the coloured PA6 luminous fibres were characterized. The results revealed that luminous materials were dispersed uniformly in the fibres without obvious agglomerates. The yellow inorganic pigment and luminous material might induce a reduction in the PA 6 fibre crystallization degree. The luminous fibres emitted long-lasting phosphorescence with an excitation peak at 360 nm and emission peak at 515 nm. However, the excitation spectrum of the PA6-Y exhibited three peaks. The decay curves revealed that the yellow inorganic pigment enhanced the brightness of PA6 luminous fibres. The PA 6 luminous fibres had low colour purities and a high colour rendering index. There was no obvious difference among the emissive colours of the luminous fibres, and the colours of luminous fibres were similar to those of the pigments added.

PL

Barwione luminescencyjne włókna PA6 przygotowano przez dodanie materiałów luminescencyjnych i pigmentów nieorganicznych. Scharakteryzowano właściwości morfologiczne i optyczne barwionych luminescencyjnych włókien PA6. Wyniki wykazały, że materiały luminescencyjne były rozproszone równomiernie we włóknach bez widocznych aglomeratów. Żółte pigmenty nieorganiczne i materiał luminescencyjny mogą powodować obniżenie stopnia krystalizacji włókien PA6. Włókna luminescencyjne emitowały długotrwałą fosforescencję z pikiem drgań przy 360 nm. Krzywe zaniku wykazały, że żółty pigment nieorganiczny zwiększa jasność luminescencyjnych włókien PA6. Luminescencyjne włókna PA6 charakteryzowały się niską czystością kolorów i wysokim współczynnikiem oddawania barw. Nie stwierdzono żadnej różnicy pomiędzy kolorami emisji luminescencyjnych włókien; barwy luminescencyjnych włókien były podobne do barwy dodanych pigmentów.

5

Design and fabrication of an organic/inorganic hybrid co-planar waveguide electro-optic modulator

Gao W., Sun J., Sun X., Yan Y., Gao L., Zhang D.

Optica Applicata

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2009

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Vol. 39, nr 3

467-472

EN

We have successfully designed and demonstrated a co-planar waveguide (CPW) Mach-Zehnder (MZ) electro-optic (EO) modulator using a strip-loaded waveguide structure. The hybrid material, easily synthesized by sol-gel process, with a large EO coefficient of r33 = 50 pm/V and a long- -term stability at 80 °C for 200 hours is selected as the active layer. A simple and easily fabricated strip-loaded waveguide structure is designed for utilizing the EO material and reducing the coupling loss with optical fiber. The optimized design principles of the efficient transmission for such a modulator are discussed. The measured half-wave voltage V? of 8.5 V for the MZ modulator is gained at 1550 nm and shows a good agreement with the simulating result.

6

Preconcentration/separation of trace Cd(II) in the environment samples by hydrophilic organic solvent gas flotation

Li C., Xu X., Yan Y., Zhang Z.

Chemia Analityczna

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2009

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Vol. 54, No. 6

1355-1366

EN

Combining solvent notation with aqueous two-phase extraction, hydrophilic organic solvent gas flotation method has been proposed for the first time. This new technique has been used to preconcentrate/separate Cd(II) in the environment samples. The procedure is based on the stable ternary ion association complex , which easily dissolves in propanol. The content of Cd(II) in the samples was determined by flame atomic absorption spectrometry. The impact of analytical parameters, like pH, conditions of phase separation, volume of complex reagent and flotation time on recoveries of Cd(II) were investigated. Recoveries of Cd(II) were 100%. The relationship between the measured absorbance and Cd(II) concentration was linear in the range 0.050-5.000 μg mL-1, according to the following regression equation F — 2.8967c — 0.1474, linear correlation coefficient was r = 0.9997. Detection limit of the method was 0.0115 &mug mL-1 Cd(II). For 15-fold determination of 1 &mugmL-1 Cd(II) RSDwas2.l%. Preconcentration factor of this method was 10, which was much higher than that of aqueous two-phase extraction. The proposed method was applied to the determination of Cd(II) in environmental samples with satisfactory results.

PL

Po raz pierwszy opracowano metody flotacji gazowej z użyciem hydrofilowego rozpuszczalnika organicznego opartą na połączeniu ekstrakcji dwufazowej z flotacją gazową. Nową technikę zastosowano do wydzielania i wzbogacania śladów Cd(II) z materiałów środowiskowych. Postępowanie jest oparte na użyciu stabilnego kompleksu potrójnego , dobrze rozpuszczalnego w propanolu. Zawartość Cd(ll) w badanych materiałach oznaczano za pomocą płomieniowej atomowej spektrometrii absorpcyjnej. Zbadano wpływ parametrów analitycznych: pH, warunków rozdzielania faz. objętości dodawanego odczynnika tworzącego połączenie jonowo-asocjacyjne i czasu flotacji na odzysk kadmu. Opracowane postępowanie zapewnia odzysk 100%. Zależność mierzonej absorbancji od stężenia kadmu jest liniowa w zakresie 0,050—5,000 &mug mL-1, zgodnie z rónaniem regresji F = 2,8967 c - 0,1474; wartość liniowego współczynnika korelacji wynosi r = 0,9997. Granica wykrywalności metody wynosi 0.0115 u.g mL-1, względne odchylenie standardowe, RSD 2. l % (obliczone na podstawie wyników 15 pomiarów absorbancji roztworów zawierających Cd(II) w stężeniu l ugmL-1). Współczynnik wzbogacenia wynosił 10 i był znacznie większy niż w przypadku stosowania ekstrakcji dwufazowej. Opracowaną metodę z powodzeniem zastosowano do oznaczania Cd(Il) w materiałach środowiskowych.

7

Real-time face detection and pose estimation for driver monitoring

Guo Z., Yan Y., Hua J., Yang J.

Image Processing & Communications

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2006

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Vol. 11, no 2

83-96

EN

For a driver monitoring system, one of the most important problems to solve is face detection rapidly. This paper presents an efficient approach to achieve fast and accurate face detection in gray level videos. Candidates of face at different scales are selected by finding regions based on Mask Transform (MT). To obtain real one, all the face candidates are then verified by using support vector machines (SVMs) based on Multi-scale 2D Walsh-Hadamard features. Head pose is estimated on the basis of accurate face detection. At last, we analyzed the head pose by a kind of Bilateral-projection Matrix Principle Component Analysis (BMPCA) algorithm proposed. Experimental results on many videos show that the algorithm can detect driver's face rapidly and estimate the head pose accurately. The proposed method is robust to deal with illumination changes, glasses wearing and different head pose with moderate rotations. Experimental results demonstrate its effectiveness.

8

Formulae for nonsquare constants of Orlicz sequence spaces with Orlicz norm

Yan Y.

Bulletin of the Polish Academy of Sciences. Mathematics

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2003

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Vol. 51, no 3

233-246

EN

Let l^phi be the Orlicz Sequence space generated by a N-function Phi(u) equipped with the Orlicz norm, phi be the right derivative of Phi. We show that the nonsquare constants Cj (l^phi] in the sense of James and Cj (l^phi ) in the sense of Schaffer satisfy: (i) if phi is concave, then Cj(l^phi) = sup inf [...], (ii) if phi is convex, then Cs(l^phi) = inf inf [...]. With this result we obtain some formulae for practical computation of non-square constants.

9

On a pair of geometric parameters of Orlicz norm

Yan Y.

Annales Societatis Mathematicae Polonae. Seria 1: Commentationes Mathematicae

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2001

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[Z] 41

257-263