Abstract: An experimental device and method for simulating a subsurface erosion process is disclosed, including a constant-pressure water supply device, a subsurface erosion generator, and a water-soil collection device. The constant-pressure water supply device and the subsurface erosion generator communicate with each other by a pipeline. The constant-pressure water supply device is used to simulate a natural water flow in subsurface erosion. The subsurface erosion generator is used to carry sand and display the occurrence process of water-soil subsurface erosion. The water-soil collection device is used to collect soil and water loss data required for an experiment. In accordance with the experimental device, the water-soil subsurface erosion process can be accurately displayed, a water pressure can be adjusted as needed, and a height between the constant-pressure water supply device and the erosion generator can be adjusted to simulate the terrain.

Abstract: Immunogenic peptide fragments of metalloprotease ADAMTS-7 including a first short peptide, which is any one of the followings: a short peptide having the amino acid sequence shown in SEQ ID NO: 1 in the sequence listing; a short peptide having the amino acid sequence shown in SEQ ID NO: 2 in the sequence listing; a short peptide having the amino acid sequence shown in SEQ ID NO: 3 in the sequence listing; a short peptide having the amino acid sequence shown in SEQ ID NO: 4 in the sequence listing. The description includes uses of conjugates containing the above short peptides and vaccines containing the conjugates. The vaccines containing the short peptides can remarkably inhibit the intimal neogenesis in the vascular restenosis mouse models and the occurrence of atherosclerosis in high-fat-fed mice, and can be used for the prevention or treatment of atherosclerosis and/or vascular restenosis.

Abstract: An anchor structure is disclosed; the anchor structure is set on a mandrel of a downhole plugging apparatus. The anchor structure comprises (a) a clamping device, (b) a plurality of slips and (c) a conical slip holder, wherein the slips are connected to a conical face of the conical slip holder, and (d) a containing space between the clamping device and the slips; the anchor structure further comprises (e) a stroke pressure compensating device which is set within the containing space and can be compressed to provide pressure for the slips, wherein the containing space is designed to be able to accommodate whole or part of the stroke pressure compensating device in the situation that the slips are anchored into a wellbore wall and the clamping device is in contact with the conical slip holder. The containing space would prevent the stroke pressure compensation device from being damaged or extruded completely, and preclude the clamping device from contacting the slips directly when the slips retract.

Abstract: The present invention discloses a stress-buffer release lever, which comprises an outer lever and an inner lever; the outer lever consists of a front end and a back end, wherein external threads are provided on both ends of the outer lever; a weakened section is set between the front end and the back end of outer lever; a co-axial through-hole is provided inside the outer lever, and internal threads are set on an inner surface of the through-hole; the inner lever's outer surface is provided with an external thread, the inner lever is set within the through-hole of the outer lever and is connected to the outer lever by the threads; the tensile strength of the inner lever is lower than that of the outer lever. The current invention also discloses a downhole plugging apparatus.