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The quadcode is a hierarchical data structure for describing digital images. It has the following properties: (1) straightforward representation of dimension, size, and the relationship between an image and its subsets; (2) explicit description of geometric properties, such as location, distance, and adjacency; and (3) ease of conversion from and to raster(More)
A method is presented for determining whether two given regions are adjacent, and for finding all the neighbors of different sizes for a given region. Regions are defined as elementary squares of any size. In a companion paper</italic> [<italic>2</italic>], <italic>we introduce the quadcode and discuss its use in representing geometric concepts in the coded(More)
The Leucine rich repeat containing G protein coupled receptor 5 (LGR5), may be a candidate marker of non-small cell lung cancer (NSCLC) cells with stem cell-like properties. Aldehyde dehydrogenase 1A1 (ALDH1A1) is one of NSCLC stem cell markers. To identify the relationship of LGR5 and ALDH1A1 in NSCLC, we analyzed the expression of LGR5 and ALDH1A1 in(More)
Based on a new structure of precise location and decoupling between the transducer elements, high frequency underwater transmission transducer arrays with 4 elements and 8 elements serried uniform linear array were studied, using novel 1-3-2 type piezoelectric composite as the sensing material. There are ceramic framework supports in the transverse and(More)
In this paper, two new concepts of DR (Dose Repulsion) and DG (Dose Gravitation) are presented with their calculation formulas. For the problem of selecting beam arcs in x-knife radiotherapy Planning system, a mathematics model of constrained optimization has been built. Furthermore, we have produced a feasible project of automatic selecting optimized beam(More)
OBJECTIVE To explore a novel method of three-dimensional (3D) reconstruction based on vector field smoothing, for the purpose of 3D surface reconstruction of DICOM format volume data sets. METHODS 3D external surface of three sets of volume data, namely craniocerebral volume data, pelvis volume data, and rat embryo volume data, were respectively extracted(More)
OBJECTIVE To establish a quantitative assay for enterovirus 71, this can be used in detecting the virus content during vaccine development and production. METHODS We established the method of quantitative assay for EV71 by using double antibody sandwich ELISA. The sensitivity, accuracy,precision and specificity of the method were evaluated. RESULTS We(More)
A novel 1-3-2 type piezoelectric composite is developed. There are piezoelectric ceramic framework supports at transverse and longitudinal directions in its structure, so it is free from the influence of any outside mechanic impact and environmental temperature change. The sample characteristic is good coherence. It has many advantages, such as a high(More)
OBJECTIVE To develop a 96-microwell plate DNA diagnostic chip for simultaneous detection of 9 major foodborne bacteria. METHODS Type-specific PCR primers labeled with biotin and oligonucleotide probes were designed according to the conservative genes of 9 major foodborne bacteria Staphylococcus aureus, Salmonella spp., Escherichia coli O157:H7 (Stx1 and(More)
OBJECTIVE To build proper three-dimensional models of human organs for radiation dose calculation. METHOD Human organ models were built by contour reconstruction algorithm conforming to 4 criteria. The contours of the organs were extracted based on the contours of the reconstructed organ surfaces, and the three-dimensional models with smooth surface,(More)