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A device / system and a method for the treatment of enlarged prostate and other urologic abnormalities are presented. This system enables the simultaneous attachment of several interstitial coaguiative treatment probes as well as an ablative fiber to perform a combined treatment utilizing the intervention time and the time of the localized anesthesia effect in an optimal manner. The amount of tissue removed by the urologist by vaporization can be kept to a minimum, thanks to the (delayed) improvement of the achieved symptom scores resulting from the denaturalizing effect of the interstitial coaguiative fibers. In one preferred embodiment, two or more types of delivery systems are embedded in a single device for achieving optimal tissue ablation and coagulation effects including at least one non-laser source such as microwave energy, capable of producing radiation energy to coagulate tissue and at least one laser source capable of producing radiation to ablate tissue. In another preferred embodiment, device comprises two or more laser sources which emit at adjustable wavelengths controllable by physician according to ablative and coaguiative needs and tissue penetration needs depending on their effective absorption in different tissue components. Wavelengths ranges are chosen such that tissue absorption properties change sensibly with small variations of such wavelengths, based on a steep region of the absorption curve. Radiation may be applied in continuous, semi-continuous or pulsed wave, in different combinations. In another preferred embodiment, optical fiber has a central core for transmitting laser radiation, and a cladding layer about the core that may further transmit other laser radiation of a different or a same wavelength as the core.

The invention discloses a railroad bed waterproof structure and a pavement method thereof. The waterproof structure is located between a railroad bed and railway ballast and comprises a waterproof layer which comprises gravel stacked on the surface of the railroad bed and a waterproof polymer coating arranged in gravel gaps in a filling manner; the waterproof polymer coating is poured or sprayed into the gravel gaps, and the waterproof layer is obtained after solidification of the waterproof coating; the waterproof layer is 3-6 cm thick and is 25-35 cm away from the rail flange, and the horizontal width of a main track is 4-6 m; the average particle size of the gravel is 5-7 mm. With the adoption of the pavement method, the waterproof layers with different thicknesses can be paved according to specific demands, the pavement method is simple and fast; the waterproof structure has excellent waterproof performance and comprehensive mechanical performance; further, the waterproof structure further comprises a sand bed arranged between the railroad bed and the waterproof layer as well as a gravel layer arranged between the waterproof layer and the railway ballast, and the mechanical performance and the waterproof performance of the waterproof structure can be further improved.

The invention discloses a hot isostatic pressing forming method of a nickel-based superalloy powder disc, specifically a hot isostatic pressing forming method of a nickel-based superalloy powder, which is suitable for preparing powdered superalloys directly formed by hot isostatic pressing Disc, the present invention uses the superalloy powder prepared by the plasma rotating electrode method as raw material, puts the powder into the sheath under vacuum conditions and seals and welds the hot isostatic pressing, the temperature of the first hot isostatic pressing should be higher than γ' melting temperature is 10-30°C, pressure ≥100MPa, time ≤1h; after the first step is completed, the temperature is raised to 50-100°C below the liquidus temperature, the pressure is ≥100MPa, and the time is ≤30min; after the second step is completed, the temperature drops to The melting temperature of the low melting point phase is 10-20°C below the melting temperature, the pressure is ≥100MPa, the temperature is kept for 30min, and the furnace is cooled. The invention can effectively suppress the generation of PPB defects in the hot isostatic pressing process and improve the alloy density, thereby preparing a high-temperature alloy powder disk with uniform and dense structure.

The invention discloses an ultra-high molecular weight polyethylene oxide fiber and a preparation method thereof. The preparation method includes: providing a spinning solution comprising ultra-high molecular weight polyethylene oxide, an antioxidant and a spinning solvent, the spinning solvent including water, dimethyl sulfoxide, methanol, tetrahydrofuran, toluene, benzene, N , N-dimethylformamide and 1,4-dioxane, etc., after dissolution, the molecular weight of the ultra-high molecular weight polyethylene oxide is more than 70% compared with the raw material retention rate; using wet spinning method, the spinning The solution is injected into a coagulation bath to coagulate and fix to obtain jelly filaments, which are then extracted and dried to obtain ultra-high molecular weight polyethylene oxide extracted and dried fibers, which are then thermally drawn to obtain ultra-high molecular weight polyethylene oxide fibers. The ultra-high molecular weight polyethylene oxide fiber of the present invention has better mechanical properties, higher fiber molecular weight retention rate than raw materials, high molecular weight and high orientation degree, and the preparation method is stable and feasible, and is convenient for large-scale production.