This paper presents a novel steering mechanism embedded in a point-the-bit rotary steerable system (RSS) for oilfield exploitation.The new steering mechanism adopts a set of universal joints to alleviate the high alternative strain on drilling mandrel and employs a specially designed planetary gear small tooth number difference (PGSTD) to achieve d
The study addresses the economic development of four European countries - Romania, Hungary, Czech Republic, and Poland beginning with 1990.It will be employed a descriptive analysis of their redken shades eq 07m driftwood trade and growth dynamics.Emphasis will be placed on the determinants of economic growth of this group of countries in general a
Many solar panels for spacecrafts are deployed by Tape Spring Hinges (TSHs) which have changeable stiffness.The stiffness of TSH is small when panels are folded, and it becomes large quickly in its deployed status.Since the solar panel is a thin sheet, flexible deformation is easily generated by orbit maneuvers.The coupling effect between the nonli
Over the past few years, there has been a great development of audiovisual electronic media.It brings great opportunities in many scientific fields but is also subject to many judgments of criticism from opponents.Therefore, in view of the enormity of the changes and expansion of the culture, many circles wonder and analyze what changes occur among
Background: Skin is a complex organ composed of epidermis, dermis and skin adnexa producing multitude of tumors.The skin adnexal neoplasms are classified into sub-groups, depending on their differentiation towards hair follicles, sebaceous, apocrine and eccrine glands.Clinically adnexal neoplasm presents as asymptomatic papules or nodules, having n