Modified male insects have been used to control populations several times before. Most early attempts were with the release of sterile males created by irradiation. One of the first successes was against the screwworm fly before the second world war in the south-east US. The war disrupted experiments but, by 1952, laboratory and field experiments suggested the approach had promise. A large-scal...

Underwater robotics is currently a growing field. To be able to autonomously find and collect objects on the land and in the air is a complicated problem, which is only compounded within the underwater setting. Different techniques have been developed over the years to attempt to solve this problem, many of which involve the use of expensive sensors. This paper explores a method to find the dep...

An integrated fuzzy guidance (IFG) law for a surface to air homing missile is introduced. The introduced approach is a modification of the well-known proportional navigation guidance (PNG) law. The IFG law enables the missile to approach a high maneuvering target while trying to minimize control effort as well as miss-distance in a two-stage flight. In the first stage, while the missile is far ...

The overload control of missile system is researched under the condition that the control direction is unknown. A nussbaum gain strategy is adopted to solve the unknown control direction problem for the linear model of missile motion of pitch channel . The backstepping technology and integral action are used to cope the system uncertainty. A novel type of control law, which is only consisted of...

A visual simulation system of fragment warhead missile attacking F-16C ''Falcon'' battle plane based on simulation and virtual reality technology is put forward. Firstly, the overall design of visual simulation of missile attacking F16 battleplane is implemented, and all functions of each module are demonstrated in detailed. Then 3D models in virtual battle field are optimized by level of detai...

editor’s note geopersia is published biannually by the college of science, university of tehran, iran. the college of science published “journal of science”, which covered all fields of basic science, from 1968 to 2010. it was then decided that the college’s journals should be more specialized, and hence publication of geopersia was launched. geopersia aims to publish peer-reviewed original res...