Abstract: A purification method for detection of a strontium isotope in a silk cultural relic. The method includes: (1) enrichment of the strontium isotope: after cleaning the silk cultural relic, adding the silk cultural relic to a digestion agent for microwave digestion, and conducting evaporation drying; and adding a dried product to a nitric acid solution for centrifugal separation, and extracting a supernatant; and (2) purification of the strontium isotope: first, mixing 4?,4?(5?)-di-tert-butyldicyclohexano-18-crown-6 and a defoamer and adsorbed to a purified resin separation column, and pre-cleaning the purified resin separation column with a nitric acid solution; next, injecting the supernatant in step (1) into the purified resin separation column with a nitric acid solution as a carrier solution; and then, injecting an 84Sr solution and an elution solution into the purified resin separation column in sequence to obtain a separated and purified strontium solution.

Abstract: A sample preparation mould and a sample preparation method for the triaxial test of MSW are provided. In the present invention, the cylindrical main mould comprises two curved steel pieces, and the two sides of each curved steel piece have a stretched connection part; the two curved steel pieces are connected with each other and clamped by two steel clamps; porous stones are arranged at two ends of the cylindrical main mould and fixed separately by a top limiting lantern ring and a bottom lantern ring; the top limiting lantern ring is detachably connected to the top hopper, from which MSW materials are input; the cylindrical main mould is radially constrained in four positions, and the two ends thereof are axially constrained, thereby significantly improving stability during compacting and hence ensuring the axial and radial sizes of the MSW sample.

Abstract: The present disclosure provides a weaving method of a weft-backed jacquard fabric with color shading effects and belongs to the technical field of weaving methods. In a single-warp and double-weft structure with a weft yarn arrangement ratio of Wefts A and Wefts B of 2:1, by designing two groups of face weaves and backing weaves and corresponding backed points and using a shaded strengthening method, two color shading effects of color shading of the Wefts A and mixed color shading of the Wefts A and the Wefts B of the fabric are achieved. A maximum number of shaded weaves is [R/N(6R?2J2?J1?3)+2], and a grade number of shaded color is less than or equal to the maximum number of the shaded weaves. The designed fabric meets the covering requirements and can be mass produced.

Abstract: The present disclosure discloses an electromagnetic regulating valve with a check function. The valve may effectively regulate the flow in a valve body. Due to different lengths and taper angles of a valve flap group, the flow can be regulated more finely, and a medium can be prevented from backflow by a check function when necessary. Meanwhile, a mesh structure of bases of valve flaps can effectively reduce the instability of flow field motion so as to achieve an effect of rectifying.

Abstract: The present disclosure discloses an electromagnetic regulating valve with a check function. The valve may effectively regulate the flow in a valve body. Due to different lengths and taper angles of a valve flap group, the flow can be regulated more finely, and a medium can be prevented from backflow by a check function when necessary. Meanwhile, a mesh structure of bases of valve flaps can effectively reduce the instability of flow field motion so as to achieve an effect of rectifying.

Abstract: Disclosed is a two-turn-one-movement parallel mechanism with a large turning angle, comprising a machine frame, a movable platform, a first branch and two second branches, characterized in that the first branch comprises a machine frame turning pair, a first moving pair slider, a first moving pair guide rod and a first universal joint; each one of the second branches comprises a second moving pair guide rail, a second moving pair slider, a second universal joint, a connecting rod and a movable platform turning pair; in the two second branches, the axis of the first turning pair of each one of the second universal joints is superimposed with and parallel to the axis of the machine frame turning pair in the first branch, and the axis of each one of the movable platform turning pairs is parallel to the second turning axis of the first universal joint in the first branch.

Abstract: Disclosed is a two-turn-one-movement parallel mechanism with a large turning angle, comprising a machine frame, a movable platform, a first branch and two second branches, characterized in that the first branch comprises a machine frame turning pair, a first moving pair slider, a first moving pair guide rod and a first universal joint; each one of the second branches comprises a second moving pair guide rail, a second moving pair slider, a second universal joint, a connecting rod and a movable platform turning pair; in the two second branches, the axis of the first turning pair of each one of the second universal joints is superimposed with and parallel to the axis of the machine frame turning pair in the first branch, and the axis of each one of the movable platform turning pairs is parallel to the second turning axis of the first universal joint in the first branch.

Abstract: Measuring refractive index of air based on laser synthetic wavelength interferometry. The Apparatus includes a dual-frequency laser that emits orthogonal linear polarized light of wavelengths ?1 and ?2, a beamsplitter, two polarizing beamsplitters, two corner-cube retroreflectors, a quartz vacuum cavity of length L disposed in the measuring optical path in parallel to the light propagation direction, and two detectors. The apparatus is used to measure the refractive index of air using the dual-frequency laser to emit orthogonal linear polarized light with wavelengths ?1 and ?2, using the beamsplitters, corner-cube retroreflectors, quartz vacuum cavity, and detectors. The integer N and fraction ? of interference fringes of wavelength ?2 are determined. The refractive index of air n is obtained by using the length L of the vacuum cavity, integer N and fraction ? of the interference fringes of wavelength ?2.

Abstract: This invention discloses a method of fabricating color jacquard fabric, comprising the processes of design and fabrication of pattern card, loom preparation, looming and weaving. The steps of design and fabrication of pattern card are: reading target image for jacquard into a computer; adjusting the image and setting parameters; selecting pixel value according to image dimensions; modifying the image; dividing the modified target image into motif image and auxiliary pattern around the motif image, designing and making the pattern card of motif image and auxiliary pattern of different design characteristics by jacquard design software; and finally combining said two pattern cards into a pattern card that represents the image and pattern of different characteristics in one fabric with corresponding warp and filling yarns. The invention can provide vivid lifelike picture of fabric, integrating rich color representation and artful pattern.

Abstract: This invention discloses a method of fabricating color jacquard fabric, comprising the processes of design and fabrication of pattern card, loom preparation, looming and weaving. The steps of design and fabrication of pattern card are: reading target image for jacquard into a computer; adjusting the image and setting parameters; selecting pixel value according to image dimensions; modifying the image; dividing the modified target image into motif image and auxiliary pattern around the motif image, designing and making the pattern card of motif image and auxiliary pattern of different design characteristics by jacquard design software; and finally combining said two pattern cards into a pattern card that represents the image and pattern of different characteristics in one fabric with corresponding warp and filling yarns. The invention can provide vivid lifelike picture of fabric, integrating rich color representation and artful pattern.