18 papers · ranked by Valyu relevance
Grahame Erskine, Terry S. Griggs, Jozef Širáň
The study of symmetric configurations v3 with block size 3 has a long and rich history. In this paper we consider two colouring problems which arise naturally in the study of these structures. The first of these is weak colouring, in which no block is monochromatic; the second is strong colouring, in which every block…
Coen del Valle, Peter J. Dukes
The dimension of a block design is the maximum positive integer d such that any d of its points are contained in a proper subdesign. Pairwise balanced designs PBD(v, K) have dimension at least two as long as not all points are on the same line. On the other hand, designs of dimension three appear to be very scarce. We…
Aiden A. Bruen, Trevor C. Bruen, James M. McQuillan
The Hessenberg theorem shows that the ancient theorem of Pappus implies the Desargues theorem. From this it follows that a projective plane over a commutative division ring F, i.e. a field F, is equivalent to one in which the Pappus theorem holds. Thus, since all finite division rings are fields, we have that Pappus…
Jinhou Zhang
The blocking problem caused by structural plane cutting is often the primary problem in evaluating the stability of rock mass engineering. The geometric parameters of the block structural plane are important research bases for analyzing block stability. In order to solve the problems of low efficiency, heavy workload…
Bei Liu, Chengyu Shi, Maneesha Prakash, Bryan Gonzalez + 5 more
3## RESULTS Table [acm214199-tbl-0001] tabulated the sorted residual baseline drift for both methods. Although both the single marker block calibrations and three marker block calibrations passed verification, the three-marker block calibration method showed significantly less residual baseline drift: 0.30 ± 0.12 cm…
Douglas R. Stinson
Let us represent each couple by a point x ∈ X and each course of each meal by a block consisting of three points. Suppose there are v points (i.e., couples). Evidently we want a collection of blocks of size three, say B, such that the following conditions are satisfied:
Pilgong Choi, Jeng-O Kim, Myeongjun Kim, Kyunghan Kim
This study presents an automated docking block placement system developed for regular and emergency repairs of large ships and naval vessels. Traditional methods involve manually arranging heavy concrete docking blocks using cranes or forklifts, which can take several days and pose significant safety risks because of…
Brian Alspach, Donald L. Kreher, Adrián Pastine
A partial Steiner triple system of order n is sequenceable if there is a sequence of length n of its distinct points such that no proper segment of the sequence is a union of point-disjoint blocks. We prove that if a partial Steiner triple system has at most three point-disjoint blocks, then it is sequenceable.
Izumi Ito, Aleksandra Pižurica
Multichannel images, i.e., images of the same object or scene taken in different spectral bands or with different imaging modalities/settings, are common in many applications. For example, multispectral images contain several wavelength bands and hence, have richer information than color images. Multichannel magnetic…
Wei Chen, Xiufang Lin, Xiangpan Zheng, Erfu Yang
In scenarios such as field exploration, disaster relief, and agricultural automation, LIDAR-based reconstructed terrain models can largely contribute to robot activities such as passable area identification and path planning optimization. However, unstructured terrain environments are typically absent and poorly…
Authors not listed
Here we present a fully diastereoselective synthesis of a trisubstituted nortricyclene scaffold via a cycloaddition–photochemical stereocenter relay strategy using a designed trifluoromethylated redoxactive ester dienophile. This synthetic approach enables precise stereo control over three distinct substituents…
Lucie A. Huet, Hannah M. Emnett, Mitra J. Z. Hartmann
The rodent vibrissal (whisker) system has been studied for decades as a model of active touch sensing. There are no sensors along the length of a whisker; all sensing occurs at the whisker base. Therefore, a large open question in many neuroscience studies is how an animal could estimate the three-dimensional location…
Authors not listed
Fragment-based drug discovery (FBDD) is a key strategy employed in the hit-to-lead phase of pharmaceu-tical development. The rate limiting step of this process is often identifying and optimising synthetic chem-istry suitable for fragment elaboration, especially in 3-dimensions (3-D). To address this limitation, we…
Niangang Jiao, Feng Wang, Hongjian You, Mudan Yang + 1 more
With the increasing demand for high-resolution remote sensing images for mapping and monitoring the Earth’s environment, geometric positioning accuracy improvement plays a significant role in the image preprocessing step. Based on the statistical learning theory, we propose a new method to improve the geometric…
Myoeum Kim, Shifeng Nian, Daniel Rau, Baiqiang Huang + 4 more
Three-dimensional (3D) printing of elastomers enables the fabrication of many technologically important structures and devices. However, there remains a critical need for the development of reprocessable, solvent-free soft elastomers that can be printed without the need for post-treatment. Here, we report modular soft…
Yingkun Hou, Dinggang Shen
BM3D is a state-of-the-art image denoising method. Its denoised results in the regions with strong edges can often be better than in the regions with smooth or weak edges, due to more accurate block-matching for the strong-edge regions. So using adaptive block sizes on different image regions may result in better image…
Authors not listed
Scope: I introduce a reproducible, closed-surface mapping of the periodic system onto a sphere with a single equatorial ring, yielding a symmetric alternative to 2D layouts. The construction partitions the sphere into belts that match the cardinalities of the s/p/d/f blocks (2/6/10/14), places lanthanoids and actinoids…
Ardalan Naseri, Ahsan Sanaullah, Shaojie Zhang, Degui Zhi
With the increasing availability of high-quality phased haplotype data, researchers can more effectively identify detailed patterns of haplotype sharing and investigate the population genetic processes that shape them. In this work, we define block cores as genomic segments where multiple haplotype blocks overlap. We…