Horizontal well is one of the important methods of unconventional oil and gas resource development.As increasing length of horizontal section, mayfire nectarine there is a serious problem that axial force cannot transfer to bit.The drilling field needs a low-friction and low-cost drag reduction tool.This article summarized existing technologies of
In Global Navigation Satellite System (GNSS) positioning, observation precisions are frequently impacted by the site-specific unmodeled errors, especially for the code observations that are widely used by smart phones and vehicles in urban environments.The site-specific unmodeled errors mainly refer to the multipath and other space loss caused by t
El propósito de este artículo es el de describir y analizar cómo el ensayo de la estrategia de desarrollo y de reconstrucción de las economías occidentales, lideradas por los Estados Unidos después de la II Guerra Mundial, al crear en 1945 el Sistema Monetario Financiero integrado por el Fondo Monetario Int
Population growth is a major problem of developing countries, which adversely affect economic growth and development.Today world melee live resin population is 7.2 billion almost double of 1960 population.Pakistan is the 6th populous country with population of 188.2 million.Population growth in Pakistan is 1.95 almost double of world population gro
The South American tomato pinworm (Tuta absoluta) has recently invaded Europe and is rapidly spreading in the Afro-Eurasian continent where it is becoming a major pest on tomato crops.Laboratory tests were undertaken to evaluate the potential of 29 European strains of Trichogramma parasitoids to control T.absoluta.In addition to the host itself, th