37results about How to "Avoid potential threats" patented technology

The invention relates to a preparation method of a dopamine composite nano-fiber affinity membrane for adsorbing La3+. The preparation method comprises the steps of (1) dissolving polymer materials in a solvent to obtain a polymer blended solution with the mass percentage concentration of 8%-30%, and then obtaining a composite nano-fiber membrane through electrostatic spinning, and (2) soaking the composite nano-fiber membrane in a Tris-HCl solution of dopamine, and obtaining the dopamine composite nano-fiber affinity membrane for adsorbing the rare-earth metal ion La3+. The preparation method is simple and practical, raw materials can be easily obtained, the cost is low, the dopamine composite nano-fiber affinity membrane for adsorbing the La3+ can be conveniently and accurately prepared, and the large-scale production operation can be easily achieved. According to the preparation method, the dopamine composite nano-fiber affinity membrane with the high specific surface area can be widely applied to the fields such as rare-earth metal La3+ gathering, rare-earth metal La3+ adsorbing, rare-earth metal La3+ separation, chemical probes, sensors and water treatment.

The invention relates to a method for quickly mooring an offshore operation helicopter; equipment used in the method comprises a hydraulic power device, a quick mooring device, a prefabricated track,a camera, a feeler lever, a laser target source and control equipment, and the method comprises the following steps: S1, enabling the helicopter to enter a position above an appointed landing area; S2, enabling the hydraulic power device to drive the quick mooring device to move with the helicopter along the prefabricated track; and S3, enabling the quick mooring device to rapidly capture the feeler lever on the helicopter when the helicopter lands and meets the mooring conditions, and finishing the rapid mooring of the offshore operation helicopter. The method can be suitable for both a novelhelicopter serving at the present stage and an old-model helicopter serving at the present stage, and is suitable for severe sea conditions above four stages at the same time; the mooring process ofthe offshore operation helicopter is automatically controlled, so that the operation difficulty of landing the helicopter on a ship is greatly reduced; the helicopter ship landing safety is improved;the method is more reliable and reasonable, and manpower and material resources are saved.

The present invention provides a security network attachment device for a block chain, comprising: a key management system used for providing a decryption key; a box locking mechanism used for storing a key which is stored in a unique trusted server and is supplied to a user who accesses a file; a certificate used for managing an authorized user; and a storage device used for storing a non-linear checksum of original data and the encrypted result. The user can inspect whether the file is modified during storage by means of the storage device. The user can verify the integrity of writing by verifying and analyzing a metadata file of a key body of the file and inspecting a provided digital signature. By means of the security network attachment device and method of the present invention, decryption is carried out only at a client based on data encryption, so that any unauthorized users can be prevented from accessing data, and potential threats caused by accesses threatening a system administrator and physical capture for a magnetic disk can be avoided.

The invention discloses an iodoform solution used for dressing, an iodoform dressing and a preparation method of the iodoform dressing. The iodoform solution disclosed by the invention contains 50-98 parts by weight of water, 0.5-5 parts by weight of iodoform, 0.1-5 parts by weight of water retaining agent and 2-50 parts by weight of polyethylene glycol and does not contain diethyl ether. The iodoform solution disclosed by the invention has the advantages that polyethylene glycol is adopted for replacing diethyl ether, and potential threats of diethyl ether and harm of the diethyl ether to a human body are avoided; water is taken as a solvent, so that cost of the iodoform solution is reduced; and the iodoform solution hardly volatilizes, so that the prepared iodoform dressing is long in guarantee period and is easy to preserve.

The invention discloses a chuck fixture for loading and unloading radioactive sources of well logging probes. Mesh to drive the spin chuck gear and shaft to turn. A clamp seat is arranged on the rotating chuck gear, and two opposite clamps are installed on the upper surface of the clamp seat through slide rails, and the two clamps are respectively connected with clamping stepping motors. A cross bar support is arranged on the base, a pin shaft is arranged on the cross bar support, and the cross bar and the pin shaft rotate synchronously. The crossbar stepping motor is connected with the pin shaft to drive the pin shaft to rotate. The invention can realize the clamping and loosening of the well logging probe, and can automatically complete a series of actions such as opening the bin door, loading and unloading the radioactive source, and closing the bin door during clamping, thereby avoiding the existing manual operation potential threat to human health. The invention has simple mechanism, stable and reliable operation and low maintenance cost.

The invention provides a laser positioning computer numerical control machine tool with a dust prevention function. The laser positioning computer numerical control machine tool comprises a numerical control machine tool base and a numerical control machine tool machining system, the numerical control machine tool machining system is connected with the numerical control machine tool base, one end of a machining tool fixing rod is connected with a base structure frame, the other end of the machining tool fixing rod is connected with one end of a machining tool telescoping rod, the other end of the machining tool telescoping rod is connected with one end of a machining cover through a machining tool connecting block, the other end of the machining cover is connected with one end of a driving moving plate through a laser driving rotation machine, the other end of the driving moving plate is connected with a machining tool through a machining tool switching wheel, and a laser positioning instrument is arranged on the inner wall of the machining cover. The laser positioning computer numerical control machine tool has the advantages that the precision and dust prevention effect of the numerical control machine tool are effectively improved, and potential harm caused by metal dust leakage to operators is avoided.

The invention discloses a method for paving a heating carbon fiber composite electro-thermal material laid under a cement screed-coat. The heating carbon fiber composite electro-thermal material comprises a reflecting layer, a heat-insulation layer, a carbon fiber low-temperature electro-thermal composite material, a waterproof layer, an anti-leakage current layer and the cement screed-coat which are sequentially laid on a cement ground, and the carbon fiber low-temperature electro-thermal composite material is a heating planar heater. The method for paving the heating carbon fiber composite electro-thermal material laid under the cement screed-coat is realized by the aid of the waterproof layer, the carbon fiber low-temperature electro-thermal composite material is waterproof and moisture-proof, the laid anti-leakage current layer can lead leaked current of the carbon fiber low-temperature electro-thermal composite material to directly enter an earth wire, and potential threats of the leaked current are avoided. In addition, the method solves problems that a carbon fiber low-temperature electro-thermal composite material is easy to be corroded and broken during laying in the prior art, and life safety of residents is guaranteed.

The invention discloses a product mixed-processing system and a product mixed-processing method. The product mixed-processing system comprises a recovery system used for setting at least one processing plan for a plurality of wafers, an integrated system, and a client, wherein the integrated system communicates the recovery system with the client. The product mixed-processing method comprises the following steps: at least one processing plan for a plurality of wafers is set in the recovery system; and the integrated system acquires information of the wafers from the client, verifies the at least one processing plan, and transmits the at least one processing plan to the client for execution when the at least one processing plan proves to be correct through verification. Different operations on corresponding wafers in a batch of wafers needing different operations can be carried out at the same time, potential threats brought by manual operation are avoided, and the degree of automation is improved. In addition, the situation in which a wafer is processed repeatedly or not processed is avoided, the production efficiency is improved, and the quality is ensured.

The invention provides an overpressure relief device with controllable opening modes, which has automatic, manual and remote control opening modes. The device provided by the invention can realize the function of automatic release of overpressure, that is, when the pressure in the fuel depot rises to the set threshold, it can automatically open the cover to discharge the high-pressure gas to the safety channel; at the same time, it also has the function of manual and remote control opening, That is to say, regardless of whether the pressure in the warehouse reaches the set threshold or not, it can be opened manually or remotely, and the toxic and harmful gases in the warehouse can be released to the safe passage outside the warehouse. The device has the characteristics of reliable locking, fast opening, controllable opening mode, simple structure and convenient maintenance.

The invention provides a smooth processing device and a smooth processing method of CL-20 grains. The device comprises smooth grinding equipment, and agitating and ageing equipment, wherein a discharging opening of a smooth grinding cavity is connected with a feeding opening of an agitating and ageing cavity through a pipeline; a discharging opening of the agitating and ageing cavity is connected with a feeding opening of the smooth grinding cavity through a pipeline; the position of the pipeline, which is close to the agitating and ageing cavity, is provided with a discharging valve; a material circulating pump is arranged on the pipeline behind the position. Slurry formed by uniformly mixing the raw materials CL-20 and a grinding solution and slurry is conveyed into the smooth processing device to be circularly processed between the smooth grinding cavity and the agitating and ageing cavity; the CL-20 slurry which is sufficiently grinded and aged is discharged and then is filtered in vacuum and dried to finally obtain a CL-20 product with smooth grains. According to the smooth processing device and the smooth processing method disclosed by the invention, methods of wet-method agitating and grinding and solvent dissolving are effectively combined; the device and the method are simple to operate and high in safety; the production efficiency is high; the smooth processing of the CL-20 grains with high mechanical sensitivity can be realized.