Abstract: The present invention relates to the field of fluid heat transfer, and discloses a heat transfer enhancement pipe as well as a cracking furnace and an atmospheric and vacuum heating furnace including the same. The heat transfer enhancement pipe (1) includes a pipe body (10) of tubular shape having an inlet (100) for entering of a fluid and an outlet (101) for said fluid to flow out; internal wall of the pipe body (10) is provided with a fin (11) protruding towards interior of the pipe body (10), the fin (11) spirally extends in an axial direction of the pipe body (10), wherein a height of the fin (11) gradually increases from one end in at least a part extension of the fin. The heat transfer enhancement pipe can reduce thermal stress of itself, thereby increasing service life of the heat transfer enhancement pipe.

Abstract: A Y-type molecular sieve and a preparation method therefor are provided. The grain size of the molecular sieve is 20-100 nm, preferably 40-70 nm, and more preferably 50-60 nm. The molar ratio of silica/alumina in the molecular sieve is 4.5-7, preferably 5.0-6.5, and more preferably 6.0-6.5. The proportion of 40-70 nm grains in the molecular sieve that is measured by means of a dynamic photoelectron scattering method is 80%-95%, and preferably 85%-93%. The Y-type molecular sieve has a small grain size, concentrated grain distribution, high silica-alumina ratio and good hydrothermal stability, and can meet the needs of industrial production.

Abstract: An electronic apparatus includes a processing circuit configured to: determine a topological position of an IAB node in an IAB network at a subsequent moment, the topological position including a parent node and a donor node of the IAB node; sending a handover request to a donor node of the IAB node of the subsequent moment, so as to request that a handover of the IAB node to the parent node and the donor node of the subsequent moment is performed at the subsequent moment; and sending a handover notification to a donor node of the IAB node of a current moment, the notification comprising the topological position of the IAB node of the subsequent moment, such that the IAB node is connected, on a control plane, to both the donor node of the current moment and the donor node of the subsequent moment.