32results about How to "Does not cause swelling" patented technology

The invention discloses a dual encryption type reversible data hiding method of an encryption domain image. The method comprises three parts, namely, image encryption, reversible data hiding of the encryption domain image, secrete data extraction and original image lossless restoration; a double encryption mechanism is adopted in the image encryption part to enhance the security; secret information can be directly embedded in the encrypted images, even if the data hider knows nothing about the original image contents, the image content security and privacy leakage problems can still be effectively solved, no complex protocol is needed between the image encipherer and the secret information embedding person, and the encryption and data embedding generate no expansion of image data; the practicability is high, if only a data hiding key is present, the hidden secret information can be directly extracted from a ciphertext domain image; if only an encryption key is present, an approximate original image can be obtained by direct decryption; and if the data hiding key and the encryption key are present, it can be guaranteed that the original image can be restored without distortion afterthe hidden secret information is extracted.

The invention discloses a ciphertext domain high-capacity image reversible data hiding method, including prediction error detection, image encryption, ciphertext domain image reversible data hiding, secret information extraction and original image non-destructive recovery, wherein in the first part, all pixel points in a grayscale image are first divided into two categories that are sampling pixelpoints and non-sampling pixel points, and then all non-sampling pixel points are marked as prediction errors and accurate predictions respectively; in the second part, the marked grayscale image is encrypted by using a binary pseudo-random sequence generated by an encryption key; in the third part, the secret information is encrypted by using a binary pseudo-random sequence generated by a data hiding key, and then the encrypted secret information is used to embed data into each non-sampling pixel point that is marked as the accurate prediction in a ciphertext domain image; and in the fourth part, only the secret information is extracted, or only the original grayscale image is recovered, or the secret information is extracted first and then the original grayscale image is recovered. The method has the advantages that information can be embedded in the ciphertext domain image, and the embedding capacity is high.

The invention discloses a water-based optical lens cleaning agent composition, which comprises the following raw materials in parts by weight: 5-10 parts of organic base, 3-5 parts of inorganic base, 3-5 parts of environment-friendly chelating agent, 10-15 parts of dispersing agent, 15-20 parts of penetrating agent and 40-60 parts of de-ionized water. The water-based optical lens cleaning agent composition has the advantages that 1, the composition is an ODS (Ozone Depleting Substance) cleaning liquid substitute in the optical electronic cleaning industry, 2, the composition is a highly concentrated product and is only required to be diluted in water according to a proportion of 3-5 percent to have an excellent cleaning effect, 3, the composition is made of environment-friendly raw materials, has oral toxicity, can be contacted with skin, has extremely low inhalation toxicity and is safe to human bodies and easy to biodegrade, 4, the composition is safe to a cleaned object, does not corrode a lens, has excellent compatibility, meanwhile has excellent compatibility with most of rubber and plastic, does not swell or corrode and the like, and 5, the composition has strong cleaning power, is uniform in filming on the lens after cleaning, does not produce fog or spots and has no phenomenon of bubbling, the filming yield is greatly improved, and the production efficiency is increased.

The invention discloses a building material foaming mold with a device capable of being manually rapidly opened and positioned. The building material foaming mold comprises a stander, a static mold frame fixed on the stander, a movable mold frame movably arranged on the stander and a drive mechanism driving the movable mold frame to move, wherein the drive mechanism comprises a hand wheel and a lead screw fixed on the axis of the hand wheel, the lead screw is provided with a first lead screw nut and a second lead screw nut, threads on the part, matched with the first lead screw nut, of the lead screw is left-handed, threads on the part, matched with the second lead screw nut, of the lead screw are right-handed, and both the first lead screw nut and the second lead screw nut are connected with the movable mold frame by virtue of connecting rods. Compared with the prior art, the building material foaming mold has the beneficial effects that the driving is realized by adopting the lead screw, the mechanism is precise and reliable to move, the mold closing force is large, and the expansion and leak-out of the mold are avoided; the operation is convenient, the mold opening and closing process can be realized only by hand shaking the hand wheel, the labor intensity is alleviated, the mold closing operation time is short, and the production efficiency of the product is increased.

The invention discloses a method for reducing water-soluble zinc in zinc-containing slag produced in zinc hydrometallurgy. The method is characterized in that the method comprises steps that: A, zinc-containing slag in a pulp state is subject to primary press-filtration in a box-type filter press, such that primary filtrate and filter residue are obtained; the filter residue is left in the box-type filter press; B, the primary filtrate obtained in the step A is delivered back to a leaching process; the filter residue left in the box-type filter press is combined with pulped zinc-containing slag additionally pumped into the filter press, and secondary press-filtration is carried out, such that secondary filtrate and filter residue are obtained; C, the secondary filtrate obtained in the step B is combined with the primary filtrate; the mixture is delivered back to the leaching process; one part of the obtained filter residue is delivered to a pulping tank, and prepared pulped zinc-containing slag is delivered to the box-type filter press; the other part of the filter residue is delivered back to a lead system or a zinc system in which valuable metals are recycled, such that a press filtration period is accomplished. In the pulping process, a pulping temperature is controlled at 40 to 70 DEG C, and a liquid-solid ratio is controlled at 2-6:1. The method provided by the invention is mainly used for reducing water-soluble zinc in zinc-containing slag produced in a filtration process of zinc hydrometallurgy enterprises.

The invention discloses an animal femoral surgery positioning and fixing device. The animal femoral surgery positioning and fixing device comprises a femoral positioning and fixing table, wherein thefemoral positioning and fixing table is provided with bone holding forceps for clamping an animal femoral shaft, a femoral positioning and fixing panel for fixing the neck of the bone holding forceps,and a fixing bin for fixing a handle of the bone holding forceps; and the femoral positioning and fixing table is used for limiting and fixing the surgical standard position of an animal femur in a femoral surgery, so that a surgical operation platform for a three-dimensional standard image of the femoral surgery is formed. By the animal femoral surgery positioning and fixing device, standardization of a femoral external fixation surgery for implementing experimental models such as femoral fracture, segmental bone defect and distraction osteogenesis can be guaranteed, so that a femoral modelsurgery technology has repeatability and data reliability. The animal femoral surgery positioning and fixing device is assisted by a three-dimensional digital fixing frame as an external fixing frame,and is linked with a synchronous laser marking navigation unit, so that a required large-environment suitable body position for the surgery is provided for a surgical operator, accurate positioning is realized, and meanwhile, a required basic environment is provided for a surgical robot operating system.

A filling machine with a constant liquid level comprises filling heads connected to a high-level liquid material bin, wherein the filling heads comprise filling pipes and back-suction pipes which arevertically arranged; the filling pipes and the back-suction pipes form sleeve structures; the filling pipes are connected to the high-level liquid material bin; and the back-suction pipes are connected to a back-suction pump. The filling machine also comprises a first lifting mechanism which is used for driving the filling heads to extend downwards into to-be-filled containers and enabling the lower end openings of the back-suction pipes to be exactly positioned on a preset safe liquid level surface, wherein the back-suction flow speed of the back-suction pipes is greater than the filling flowspeed of the filling pipes; and the first lifting system is connected to the filling heads. The filling machine with the constant liquid level can be used for automatically filling material liquid into PET bottles, and is high in efficiency. In addition, the filling machine ensures that all the to-be-filled containers are finally filled with filling liquid in a uniform manner, and avoids the situation that liquid materials overflow or the liquid level surface is too low. Moreover, the PET bottles are in open states during filling, so that the PET bottles can be prevented from expanding or shrinking.