Abstract: Provided are a green sealing material for karst flowing water, and a preparation method and use thereof. The green sealing material includes a component A and a component B, with a volume ratio of the component A to the component B being in a range of 4:1 to 5:1; where the component A includes in parts by weight: 40 parts to 50 parts of a sulphoaluminate cement, 10 parts to 15 parts of a light-burned magnesium oxide, 1 part to 4 parts of boric acid, and 40 parts to 50 parts of water; and the component B includes in parts by weight: 0.2 parts to 0.4 parts of hydroxypropyl methylcellulose, 0.1 parts to 0.5 parts of polyacrylamide, 15 parts to 30 parts of potassium dihydrogen phosphate, 0.2 parts to 0.4 parts of triethanolamine, 0.5 parts to 1 part of lithium carbonate, and 80 parts to 100 parts of water.

Abstract: Systems, methods, and other embodiments described herein relate to multiple three-dimensional (3D) structures formation from a network of circularly-packed structural elements. In one embodiment, a system includes a circularly-packed network of structural elements that form multiple 3D structures. Diameters of the structural elements define a shape of the 3D structures. The circularly-packed network is adaptable to form 1) a first 3D structure and 2) a second 3D structure with a different shape than the first 3D structure. The system also includes a set of joints that connect adjacent structural elements.

Abstract: A variety of methods and arrangements are described for managing recharging of cylinders of an internal combustion engine during skip fire operation of the engine. In one method, a maximum allowed deactivation time for a cylinder is determined and the cylinder is recharged before the maximum allowed deactivation time is exceeded.

Abstract: A variety of methods and arrangements are described for operating an engine in a skip fire manner so that engine requirements, such as exhaust temperature, exhaust flow, torque and NVH, are met.

Abstract: A variety of methods and arrangements are described for managing recharging of cylinders of an internal combustion engine during skip fire operation of the engine. In one method, a maximum allowed deactivation time for a cylinder is determined and the cylinder is recharged before the maximum allowed deactivation time is exceeded.

Abstract: Liquid is finely atomized and is ejected through apertures in a disc by virtue of high frequency vibration of the disc at controlled amplitudes. To insure an adequate supply of liquid to the disc while avoiding overflow and droplet leakage through the apertures, an injector meters supply liquid to the disc and simultaneously extracts excess liquid from the disc with a siphon action.