Cooperative path planning of multiple autonomous underwater vehicles operating in dynamic ocean environment.

This paper presents a two-stage cooperative path planner for multiple autonomous underwater vehicles operating in dynamic environment. In case of static environment, global Legendre pseudospectral method is employed for collision-free paths of vehicles for the purpose of minimum time consumption and simultaneous arrival. Moreover, in order to keep the multiple autonomous underwater vehicles safe from collisions on the path segments connecting two adjacent control nodes, an adaptive intermediate knots insertion algorithm is introduced.

Observation of the effect of targeted therapy of 64-slice spiral CT combined with cryoablation for liver cancer.

Aim: To observe the effect of targeted therapy with 64-slice spiral computed tomography (CT) combined with cryoablation for liver cancer.

Methods: A total of 124 patients (142 tumors) were enrolled into this study. According to the use of dual-slice spiral CT or 64-slice spiral CT as a guide technology, patients were divided into two groups: dual-slice group ( = 56, 65 tumors) and 64-slice group ( = 8, 77 tumors).

Anatomical, animal, and cellular evidence for Zika-induced pathogenesis of fetal microcephaly.

Several recent articles published by Brain and Development in 2016 demonstrated some rare, but innovative, genetic mechanisms for microcephaly. This concise mini-review presented another novel pathogenic mechanism for microcephaly, which has actually been a worldwide medical challenge since the World Health Organization (WHO) defined the outbreak of the Zika virus (ZIKV) as an International Public Health Emergency on 1 Feb, 2016. As a recent noteworthy clinical phenomenon, the ZIKV outbreak was accompanied by a dramatically increased number of microcephalus fetuses.

Assessment of 64-slice spiral computed tomography with perfusion weighted imaging in the early diagnosis of ground-glass opacity lung cancer.

Purpose: To evaluate the use of the 64-slice spiral computed tomography (CT) with perfusion-weighted imaging in the early diagnosis of ground-glass opacity lung cancers.

Methods: 412 patients with ground-glass opacities found by conventional CT scan in our hospital, and deemed highly suspected of being lung cancers, were enrolled in the study between February of 2012 and February of 2015. Sixty four-slice spiral CTs with perfusion-weighted imaging were carried out on all patients, and the latest nodular contrast analysis software, MPR2D, 3D reconstruction technology, MIP technology and perfusion scanning technology were used to analyze lesion types, density, blood supply, peripheral signals, doubling time and tissue perfusion characteristics.

Multipurpose image watermarking algorithm based on multistage vector quantization.

The rapid growth of digital multimedia and Internet technologies has made copyright protection, copy protection, and integrity verification three important issues in the digital world. To solve these problems, the digital watermarking technique has been presented and widely researched. Traditional watermarking algorithms are mostly based on discrete transform domains, such as the discrete cosine transform, discrete Fourier transform (DFT), and discrete wavelet transform (DWT).