Abstract: A method for determining permeability of a porous medium is described which comprises the steps: a) obtaining a three-dimensional picture of the porous medium by an imaging system, b) dividing the three-dimensional picture into a number n of two-dimensional parallel slices, wherein n is an integer of 2 or more, c) identifying one or more pores in a first outermost slice (n1) using a grid which defines image pixels, d) identifying one or more pores in a second slice (n2) directly neighboring the first outermost slice (n1) using the same grid which defines image pixels as for the first outermost slice (n1), and e) labelling the one or more pores in the second slice (n2) as connected if at least one of its neighbours in the first outermost slice (n1) is a pore to give a number of connected pores as a connectivity result. Also described is a system comprising means for carrying out such a method.

Abstract: The invention provides a gravity heat pipe having a working fluid selected from the group consisting of HFO-1234ze(Z), HFO-1234ze(E), HFO-1336mzz(Z), HFO-1336mzz(E), HFO-1224yd(Z), HFO-1233zd(E), and a mixture thereof. The heat pipes of the invention are environmentally friendly, have good cooling performance and low manufacturing costs, and are suitable for cooling of communication base stations, servers, or data centers.

Abstract: A method for determining permeability of a porous medium is described which comprises the steps: a) obtaining a three-dimensional picture of the porous medium by an imaging system, b) dividing the three-dimensional picture into a number n of two-dimensional parallel slices, wherein n is an integer of 2 or more, c) identifying one or more pores in a first outermost slice (n1) using a grid which defines image pixels, d) identifying one or more pores in a second slice (n2) directly neighboring the first outermost slice (n1) using the same grid which defines image pixels as for the first outermost slice (n1), and e) labelling the one or more pores in the second slice (n2) as connected if at least one of its neighbours in the first outermost slice (n1) is a pore to give a number of connected pores as a connectivity result. Also described is a system comprising means for carrying out such a method.

Abstract: Embodiments of the disclosure disclose a method and apparatus for displaying information. The method comprises: acquiring to-be-displayed information; generating a URL of a target page, the target page including a hyperlink linking to a display page of the to-be-displayed information; sending the URL to a first terminal device, the first terminal device used for generating and displaying a QR code of the URL; determining, in response to receiving an information display request sent by a second terminal device for characterizing the second terminal device recognizing the QR code, whether the information display request meets a preset condition; and sending a page display instruction to the second terminal device, in response to determining the information display request meeting the preset condition, wherein the second terminal device displays the target page in response to receiving the page display instruction and displays the to-be-displayed information in response to the hyperlink being clicked.

Abstract: Embodiments of the disclosure disclose a method and apparatus for displaying information. The method comprises: acquiring to-be-displayed information; generating a URL of a target page, the target page including a hyperlink linking to a display page of the to-be-displayed information; sending the URL to a first terminal device, the first terminal device used for generating and displaying a QR code of the URL; determining, in response to receiving an information display request sent by a second terminal device for characterizing the second terminal device recognizing the QR code, whether the information display request meets a preset condition; and sending a page display instruction to the second terminal device, in response to determining the information display request meeting the preset condition, wherein the second terminal device displays the target page in response to receiving the page display instruction and displays the to-be-displayed information in response to the hyperlink being clicked.