The development of Earth observation systems has changed the nature of survey and mapping products, as well as the methods for updating maps. Among optical satellite mapping methods, the multiline array stereo and agile stereo modes are the most common methods for acquiring stereo images. However, differences in temporal resolution and spatial coverage limit their application. In terms of this ...

As for the optical measurement, the longer the focal length of collimator is, the less the measurement error is. However, the longer the focal length is, the more difficult the optical design is. It's higher application value to design long focal length collimator with wide-view. The paper designs a collimator with 2000mm focal length, 4 degree field of view and its wavelength range is from 480...

Transformation is an important mechanism of microbial evolution through which bacteria have been observed to rapidly adapt in response to clinical interventions; examples include facilitating vaccine evasion and the development of penicillin resistance in the major respiratory pathogen Streptococcus pneumoniae. To characterise the process in detail, the genomes of 124 S. pneumoniae isolates pro...

This paper analyzes the DNS lookup patterns from a large authoritative top-level domain server and characterizes how the lookup patterns for unscrupulous domains may differ from those for legitimate domains. We examine domains for phishing attacks and spam and malware related domains, and see how these lookup patterns vary in terms of both their temporal and spatial characteristics. We find tha...

Single-use/disposable technology (SU/DT) has emerged over the past decade as a cost-effective and fl exible basis for biopharmaceutical manufacturing (1,2). It has moved beyond the limited applications of culture bags, liquid storage bags, and sampling devices, and now includes more unit-operation-based capabilities, such as cartridge fi ltration, depth fi ltration, ultrafi ltration, and chroma...

The performance of wide-field multiple-aperture imaging systems is dominated by easily understood, low-order errors. Each aperture produces an individual image, each pair of apertures produces a set of fringes under a diffraction envelope, and the system bandwidth produces a coherence envelope. For wide-field imaging, each of these elements must be coincident in the image plane as the field ang...