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","thumbnailUrl":" -99b1-41cc-b834-2ab07c5d2077/imgingest-5709031622772391153.png?auto=webp&fit=crop&height=675&width=1200"},"name":"Need for Speed Underground 2","applicationCategory":"Games","applicationSubCategory":"Driving Games","image":null,"description":"Uncover the tuner underground in a massive, free-roaming metropolis. Get behind the wheel in one of 30 of the hottest cars and own the streets from dusk 'til dawn. Explore the city, encountering underground races, hidden hideouts, secret shops, and unexpected challengers With comprehensive performance tuning options, all-new game modes, and the most sought-after cars on the circuit, Need for Speed Underground 2 delivers the most authentic tuner experience ever.
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Abstract:Efficient fracturing is the key issue for the exploitation of geothermal energy in a Hot Dry Rock reservoir. By using the laser irradiation cracking method, this study investigates the changes in uniaxial compressive strength, ultrasonic characteristics and crack distributions of granite specimens by applying a laser beam under various irradiation conditions, including different powers, diameters and moving speeds of the laser beam. The results indicate that the uniaxial compressive strength is considerably dependent on the power, diameter and moving speed of the laser beam. The ultrasonic-wave velocity and amplitude of the first wave both increase with a decreased laser power, increased diameter or moving speed of the laser beam. The wave form of irradiated graphite is flattened by laser irradiation comparing with that of the original specimen without laser irradiation. The crack angle and the ratio of the cracked area at both ends are also related to the irradiation parameters. The interior cracks are observed to be well-developed around the bottom of the grooving kerf generated by the laser beam. The results indicate that laser irradiation is a new economical and practical method that can efficiently fracture graphite.Keywords: thermal irradiation; laser cracking; mechanical property; ultrasonic characteristic; crack distribution
Unlike older PVA abuse methods, modern SMS PVA services only sell the actual verification codes needed at the time of account registration. Our investigation into SMS PVA services led us to discover that at least one operator has built their service on top of a botnet involving thousands of infected Android phones. There are two possibilities here: Phones might be infected through a piece of malware that is accidentally downloaded by the user, or phones might be preloaded with malware during manufacturing. We discuss these issues further in our full report.
Cambridge Science Festival examines the science and suggests actions and solutions, from growing food underground and new forms of energy provision to fit-for-purpose policies and government interventions. The Festival runs from Monday, 9 March 2020 through to Sunday, 22 March 2020. Bookings open on Monday, 10 February 2020 and all events are free.
(3) Apparent style of hyperbolic curve is shown and there is a special point which makes the curve appear rapid change after the methane diffusion test of coal block under fixed triaxial compressive stress state enters the second stage. The reason may be that the amount of methane diffusion of coal block has occupied the main part as methane diffusion completely fully in test system piping, because partial free methane is contained in coal block and the methane pressure is much bigger, which makes the amount of free methane transformed from absorbed methane also larger and larger, so that the methane diffusion speed is larger and the rate of reduction is larger and lasting time is short. When the free methane diffusion is completed, the methane pressure will gradually decrease at the same time, so that methane diffusion speed is small and the reduction rate of methane diffusion speed is decreased, which is shown, too.
(4) All properties of small methane diffusion speed, small reduction rate, and lasting long time were shown in fixed triaxial compressive stress state after the test curve enters the third stage. The reason may be that the emission of methane only consists of free methane that is changed from adsorbed methane in coal block after the initial free methane is diffused completely so that the methane diffusion speed is small. Because the methane pressure will decrease gradually at this stage, the time needed by free methane changed from absorbed methane became longer and longer, which will also last a long time. Additionally, the compress effect on pore and crack structure in coal block caused by triaxial compress stress will become more and more obvious as the diffusion of methane in coal block, which makes the methane flow channel become narrow so that the methane flow becomes more and more difficult; all of these are main reasons that caused the law to be shown.
(5) Curve of methane diffusion speed of coal block under fixed triaxial compress stress state shows that methane diffusion speed will come to the value of 0 finally, but it needs a very long time. The reason may be that free methane has been gradually diffused completely in coal block as the extent of test time, and most of absorbed methane has been transformed into free methane and diffused out, and residual methane in coal block will be diffused out completely as the extent of test time; all of them are the main reasons for the law.
(6) The first stage and the third stage of the curve of methane diffusion speed of coal block under fixed triaxial compress stress state can be expressed by approximate linear relationship, but the second stage is expressed by hyperbolic. The differences between obtained law from coal block in triaxial compress stress state and pulverized coal in free state are the size of obtained fitting equation parameters. 2b1af7f3a8