High Resolution Detection of Synchronously Determining Tilt Angle and Displacement of Test Plane by Blu-Ray Pickup Head

AbstractWe present an optical design for Blu-ray pickup head that can synchronously detect a linear displacement and two-dimensional (2D) angular tilt of the test plane. In order to enhance the accuracy of tilt angle and discriminate more tilted orientations, a high resolution detector (177×177 pixels) is used as the photo detector of the Blu-ray pickup head. The horizontal beam expander is used to make the laser beam be more uniform to improve the accuracy of signal at the photo detector. The signal at the high resolution detector of the pickup head used astigmatic detection is comprised of two displacement signals and one angular signal. The displacement of the test plane is ascertained from the rate of change in the length of semi-major and semi-minor axis for elliptical beam shape on the high resolution detector. The tilt of the test plane is obtained from the brightest position of beam shape. It is not only able to judge the tilt angle for four orientations (α, β, 45°and 135°), but also the tilt angle for four orientations (30°, 60°, 120°and 150°). The smaller pixel size will help to improve the accuracy in the 2D angle measurement further

THE INTELLECTUAL CORE KNOWLEDGE OF THE MOBILE INFORMATION SYSTEM

O2O, an acronym of online-to-offline or vice versa, is a new business model blending online retailing with offline retailing. This new model improves an existing method of shopping by either integrating the online components for traditional shoppers or the traditional shopping for Internet or mobile shoppers. Few studies have examined consumers’ acceptance of new O2O business model. Therefore, this study attempts to investigate consumer acceptance of O2O business model from the status quo bias and habit perspectives that have been used to examine new system acceptance by past research. Using a sample data collected from 230 respondents, this study applies a structural equation model (SEM) to examine the relationships of the proposed research model. The results reveal that behavioural-based inertia positively impacts perceived ease of use and cognitive-based inertia positively impacts relative advantage, and consequently impacts consumers’ intention to use O2O shopping. In addition, subjective norm positively impacts perceived ease of use and relative advantage, and self-efficacy positively impacts perceived ease of use. Because O2O shopping is a consumer’s adoption of a new business model which involves information technologies and retailing services, this study thus provides in depth insights into enhancing the acceptance of both new information technologies and new business model. Particularly, inertia can facilitate consumers O2O shopping acceptance as opposed to inhibit new system acceptance found in past research. Perceived ease of use and relative advantage fully mediate the relationships between external variables (such as inertia, subjective norm, and self-efficacy) and O2O shopping intention. Implications are drawn for electronic commerce, mobile commerce, and retailing

Half-titanocene 5-t-butyl-2-(1-(arylimino)methyl)quinolin-8-olate chlorides: Synthesis, characterization and ethylene (co-) polymerization behavior

A series of half-titanocene chloride complexes bearing 5-t-butyl-2-(1-(arylimino)methyl)quinolin-8-olate ligands (L), CpTiLCl₂, has been synthesized in acceptable yields by the stoichiometric reaction of CpTiCl₃ with the respective potassium 5-t-butyl-2-(1-(arylimino)methyl)quinolin-8-olate. All half-titanocene complexes were fully characterized by elemental analysis and NMR spectroscopy, and the molecular structures of the representative complexes C1 and C2 were confirmed as pseudo octahedral at titanium by single-crystal X-ray diffraction. When activated with methylaluminoxane (MAO) or modified methylaluminoxane (MMAO), all titanium complexes exhibited good activities (up to 4.8 × 10⁵ g mol⁻¹(Ti) h⁻¹) towards ethylene polymerization. The obtained polyethylene exhibited ultra-high molecular weight (up to 11.82 × 10⁵ g mol⁻¹) with narrow polydispersity. Furthermore, effective co-polymerization of ethylene with 1-hexene or 1-octene was achieved with several percentages of co-monomer incorporation in the resultant polyethylenes

DAISY filter flow: A generalized discrete approach to dense correspondences

Establishing dense correspondences reliably between a pair of images is an important vision task with many ap-plications. Though significant advance has been made to-wards estimating dense stereo and optical flow fields for two images adjacent in viewpoint or in time, building re-liable dense correspondence fields for two general images still remains largely unsolved. For instance, two given im-ages sharing some content exhibit dramatic photometric and geometric variations, or they depict different 3D scenes of similar scene characteristics. Fundamental challenges to such an image or scene alignment task are often mul-tifold, which render many existing techniques fall short of producing dense correspondences robustly and efficiently. This paper presents a novel approach called DAISY filter flow (DFF) to address this challenging task. Inspired by the recent PatchMatch Filter technique, we leverage and extend a few established methods: 1) DAISY descriptors, 2) filter-based efficient flow inference, and 3) the Patch-Match fast search. Coupling and optimizing these mod-ules seamlessly with image segments as the bridge, the pro-posed DFF approach enables efficiently performing dense descriptor-based correspondence field estimation in a gen-eralized high-dimensional label space, which is augmented by scales and rotations. Experiments on a variety of chal-lenging scenes show that our DFF approach estimates spa-tially coherent yet discontinuity-preserving image align-ment results both robustly and efficiently. 1

Tris(ethyl­enediamine)zinc(II) dichloride monohydrate

The asymmetric unit of the title compound, [Zn(C2H8N2)3]Cl2·H2O, contains a discrete [Zn(C2H8N2)3]2+ cation with a distorted octa­hedral geometry around Zn, two uncoordinated chloride ions and one water mol­ecule. The crystal structure exhibits N—H⋯O, N—H⋯Cl and O—H⋯O hydrogen bonds

catena-Poly[[triaqua­zinc(II)]-μ-1H-1,2,4-triazole-3,5-dicarboxyl­ato]

In the title compound, [Zn(C4HN3O4)(H2O)3]n, each ZnII atom adopts a distorted octa­hedral coordination geometry, being surrounded by one chelating and one monodentate 1H-1,2,4-triazole-3,5-dicarboxyl­ate ligand and three water mol­ecules. Adjacent ZnII cations are linked by a 1H-1,2,4-triazole-3,5-dicarboxyl­ate ligand in a μ2,κ3 fashion to form a chain running along the c axis. The crystal packing is stabilized by N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds