31results about How to "Not easily affected by external factors" patented technology

The invention relates to a simple breathing machine and a breathing mask thereof. The simple breathing machine comprises a base, a storage battery pack, a shell and a control box, wherein the base isequipped with an external power line; the storage battery pack is fixedly mounted in the base and is connected with the external power line; the shell is fixedly mounted on the base; the control box is arranged on the shell; a fixing device is arranged at the bottom of the base; the storage battery pack is connected with a motor in the shell through the control box; an output end of the motor is connected with a simple breathing device; the simple breathing device is connected with an oxygen supply pipeline. The simple breathing machine has a simple structure, is convenient to operate, is capable of saving the cost of the patient or the patient families and can be widely popularized in common patients; the product wholly occupies less area, is in small volume, is more flexible, does not occupy excessive space, is energy-saving and environment-friendly, is long in service life and is difficult to be in fault; the stable supply of air flow can be realized.

The invention discloses efficient elevator guide rail mounting precision calibration equipment, and belongs to the technical field of elevator guide rail mounting calibration. The invention discloses efficient elevator guide rail mounting precision calibration equipment which comprises a guide rail body. The guide rail bodies are calibrated through the first lower supporting plate and the second lower supporting plate which are fixedly locked on the guide rail body at the bottommost end, so that the guide rail bodies are in a vertical state in an elevator shaft, and then the first upper supporting plate and the second upper supporting plate are clamped above the first lower supporting plate and the second lower supporting plate in a limiting manner and are calibrated; the first upper supporting plate and the second upper supporting plate move upwards along the guide rail bodies, whether other guide rail bodies connected based on the guide rail body at the bottommost end are inclined and staggered or not is judged by monitoring display points, on the display plate, of laser emitted by the laser emitter, the guide rail bodies are adjusted and calibrated in time, errors of the calibration mode are small, and the calibration accuracy is high. And the device is particularly suitable for calibrating the elevator guide rail with higher height and is not easily influenced by external factors.

The invention relates to a method and a system for simulating noise of engines of electric and hybrid vehicles. The method is characterized in that buzzer sound production circuits are additionally arranged on the electric vehicles and are connected into electric control systems, and CAN (controller area network) signals are sampled and acquired in real time by the aid of instruments and / or center control MCU (microprogrammed control units) after the electric vehicles are started, so that current electric vehicle state and vehicle speed signals in the CAN signals can be acquired, whether sound production conditions of the buzzer sound production circuits are met by the inputted vehicle state and vehicle speed signals or not can be judged by the instruments and / or the center control MCU, control signals can be computed and outputted to enable the buzzer sound production circuits by the instruments and / or the center control MCU if the sound production conditions are met, and sound can be outputted by buzzers; the buzzer sound production circuits can be switched off by the instruments and / or the center control MCU if the sound production conditions are not met. The method and the system have the advantages that the method and the system are easy to implement and low in cost and are stable and reliable, pedestrians can be effectively reminded of safety, and the electric vehicles can have driving assisting and safety reminding functions.

The invention relates to an anti-tumor nano-preparation of diester alginate and its preparation method. The specific mass composition is as follows: the mass ratio of diester sodium alginate to polyvinylpyrrolidone is 2‒5:1; the content of sodium diester alginate is 15 ‒50%; doxorubicin hydrochloride and celecoxib content 40‒80%; the rest is water; intrinsic viscosity of diester sodium alginate is 9.0‒14.0, organic sulfur content is 9.0‒13.0%; doxorubicin hydrochloride The mass ratio to celecoxib is 1 / 10–1 / 2. The present invention utilizes the surface activity and crystal inhibitory properties of diester sodium alginate, and uses it as a stabilizer to prepare nano-preparations of hydrophobic or amphiphilic antitumor drugs, so as to improve the solubility of drugs and increase the bioavailability of drugs , enhance the curative effect of the drug, reduce the toxic and side effects of the drug, and then be better used in the clinical application of tumor treatment. The invention can significantly inhibit the growth and metastasis of tumors in vivo and in vitro, and provides a scientific basis for the application and development of the sodium alginate diester in new dosage forms of antitumor drugs and the like.