An electronic transactionverificationsystem for use with transaction tokens such as checks, credit cards, debit cards, and smart cards that gathers and transmits information about the transaction token and biometric data. The system preferably has the ability to read or scan transaction and account information printed or encoded on the transaction token, digitally encodebiometric data, scan drivers' licenses or other identification cards, and take a signature of a customer, all at a transaction location for purposes of account verification. The electronic transactionverificationsystem preferably digitizes various indicia of the token, such as the magnetic ink (MICR) line on a presented check or the magnetic strip on a credit card or debit card, and transmits the transaction information data to a central processing system, at which the central processing system compares the inputted data with an existing database of information to determine if the customer at the point of the transaction is in fact authorized to use the account, and if the account is in satisfactory condition for approval of the transaction. The electronic verification system includes a biometric data device for recording and / or transmitting biometric data taken at the transaction location. The electronic transactionverification system can be used in conjunction with a tokenless transaction processing system to determine if the token presented for payment is associated with an account established for an authorized user that has registered with the tokenless transaction processing system.
The invention discloses a new method for on-site synthesis of a lithiumion conductive protection film for preventing poly-sulfide-ions diffusion on a surface of a lithiumsulfur battery positive electrode, and an application therefor. The method is carried out by the steps of reducing the initial dischargevoltagelower limit of a lithiumsulfur battery taking a carbon sulfur composite as the positive electrode material to be lower than the normal working voltage 1.5V to generate the lithium ion conductive protection film; the film is quite high in the lithium ionconductivity and capable of preventing the poly-sulfide-ions from being dissolved in an electrolyte to enable the lithium sulfur battery to realize and maintain higher cycle performance, rate capability, coulombic efficiency and lower self discharge performance, so that the service life of the lithium sulfur battery is prolonged, and the use cost of the lithium sulfur battery is reduced; meanwhile, porous carbon with hierarchical pores used as the supporting material can accommodate the poly-sulfide-ions and lithium sulfide generated in charging and discharging processes of sulphur and the lithium sulfur battery; and the sulphur content in the carbon-sulfur composite material made from the porous carbon with the hierarchical pores is high, so that the comprehensive specific capacity of the carbon-sulfur composite product can be improved so as to further increase the overall energy density of the battery.
The invention provides a preparation method for indiumoxide sequential nano mesoporous materials doping with metal, which comprises the following steps of: 1) the mass ratio of surfactants, nitrate of indium, ethanol, template tetraethoxysilane and hydrochloric acid in raw materials is (5-20):(1-6):50:(10-40):(0.07-0.15), the mass ratio of dopingmetal and indium is (0.02-0.15):1, and the dopingmetal is in the form of metal salt; mixing up salt with doping metal, surfactants, nitrate of indium and ethanol, stirring the mixture until the solid is totally dissolved; 2) adding tetraethoxysilane and hydrochloric acid and evenly mixing up; 3) removing dissolvent through standing and heating; 4) removing surfactants via roasting; and 5) removing the template via dissolving by aqueous alkali. According to the method provided by the invention, various different metal elements can be doped, the shape of synthesized In2O3 sequential nano mesoporous material is uniform, the operation is simple, the requirement on equipment is low, and the industrial practicality is realized.
A method and system for cleaning textile absorbers that can be recycled. The system includes the use of a particular cleaning fluid, n-propyl bromide, to clean the textile absorbers for reuse. The system may also include a removal component in which excess extraneous substances are removed from the textile absorbers prior to cleaning the textile absorbers.