Abstract: Polyurethane foams are made by curing a reaction mixture that contains an aromatic polyisocyanate, at least one iso-cyanate-reactive material having an average functionality of at least 2 and an equivalent weight of at least 200 per isocyanate-reactive group, at least one blowing agent, at least one surfactant and at least one catalyst, a certain ?-diketone compound and a water-soluble amino-functional polymer. Foams so produced emit low levels of aldehydes.

Abstract: Polyurethane foams are made by curing a reaction mixture that contains an aromatic polyisocyanate, at least one isocyanate-reactive material having an average functionality of at least 2 and an equivalent weight of at least 200 per isocyanate-reactive group, at least one blowing agent, at least one surfactant and at least one catalyst, and a certain 3-oxopropanamide compound. Foams so produced emit low levels of aldehydes.

Abstract: A polyurethane composition is provided. The polyurethane composition comprises (A) one or more prepolymers prepared by reacting at least one isocyanate compound with a first polyol component; and (B) a second polyol component; wherein at least one of the first polyol component and the second polyol component comprises an ester/ether block copolymer polyol synthesized by reacting a starting material polyether polyol with a C4-C20 lactone. The foamed or non-foamed polyurethane product prepared by using the polyurethane composition can achieve inhibited internal heat buildup, high thermal stability, improved curing speed, light stability, heat stability and superior mechanical strength. A method for preparing the polyurethane composition and a method for improving the performance property of the polyurethane product are also provided.

Abstract: A method, apparatus, device and computer storage medium for determining a source channel are disclosed. A specific implementation solution is as follows: determining an interval between a time when an application is opened for the first time and an installation time of the application; if the interval exceeds a preset duration threshold, determining a source channel of the application according to channel information carried by an installation package of the application; if the interval does not exceed the preset duration threshold, determining the source channel of the application according to channel information transferred to the application when the application is opened for the first time. The present disclosure can improve the accuracy of the source channel of the application.

Abstract: A method, apparatus, device and computer storage medium for determining a source channel are disclosed. A specific implementation solution is as follows: determining an interval between a time when an application is opened for the first time and an installation time of the application; if the interval exceeds a preset duration threshold, determining a source channel of the application according to channel information carried by an installation package of the application; if the interval does not exceed the preset duration threshold, determining the source channel of the application according to channel information transferred to the application when the application is opened for the first time. The present disclosure can improve the accuracy of the source channel of the application.

Abstract: An E-wallet transfer payment method includes: connecting a first PKI smart card to a second PKI smart card wirelessly; the first PKI smart card receiving a transfer instruction input by a first user, wherein the transfer instruction comprises a transfer amount to be transferred to a payee account; the second PKI smart card sending the payee account information to the first PKI smart card; the first PKI smart card generating transaction information according to the transfer instruction, and displaying the transaction information; the first PKI smart card receiving a confirmation instruction input by the first user according to the displayed transaction information; the first PKI smart card deducting a corresponding amount in a payment account according to the transfer amount, generating a signature information and sending the signature information to the second PKI smart card; adding the corresponding amount to the payee account according to the signature information.

Abstract: An E-wallet transfer payment method includes: connecting a first PKI smart card to a second PKI smart card wirelessly; the first PKI smart card receiving a transfer instruction input by a first user, wherein the transfer instruction comprises a transfer amount to be transferred to a payee account; the second PKI smart card sending the payee account information to the first PKI smart card; the first PKI smart card generating transaction information according to the transfer instruction, and displaying the transaction information; the first PKI smart card receiving a confirmation instruction input by the first user according to the displayed transaction information; the first PKI smart card deducting a corresponding amount in a payment account according to the transfer amount, generating a signature information and sending the signature information to the second PKI smart card; adding the corresponding amount to the payee account according to the signature information.

Abstract: The present invention discloses a method and a device for authorizing and using a virtual device, wherein the method comprises: after receiving a request for generating a virtual device, a mobile terminal configures authority information of a first virtual device, generates the first virtual device, and interacts with a servers to send the configured authority information of the first virtual device and related authentication information to the server for authenticating. After passing the authentication, the server generates a second virtual device with the above-mentioned authority information. When in use, the mobile terminal generates authentication information and sends a current use status of the first virtual device to the server for authenticating and is returned to with a authentication result. The present invention improves the security by adding the authentication with respect to the authority information during the authorization of generating the virtual device and use of the virtual device.

Abstract: A bank card transfer payment method, comprising: connecting a first terminal to a first device; connecting a second terminal to a second device; the first terminal acquiring account information about a payment account, and the second terminal acquiring account information about a payee account and sending it to the first terminal; the first terminal receiving a transfer instruction input by a first user; generating transaction information, and sending it to the first device; the first device displaying the transaction information; receiving a confirmation instruction; deducting a corresponding amount in the payment account, generating a signature information, and sending it to the first terminal; the first terminal receiving the signature information, and forwarding it to the second terminal; the second terminal sending the signature information to the second device; the second device verifying the signature information and adding the corresponding amount to the payee account when the verification succeeds.

Abstract: The present invention discloses a method and a device for authorizing and using a virtual device, wherein the method comprises: after receiving a request for generating a virtual device, a mobile terminal configures authority information of a first virtual device, generates the first virtual device, and interacts with a servers to send the configured authority information of the first virtual device and related authentication information to the server for authenticating. After passing the authentication, the server generates a second virtual device with the above-mentioned authority information. When in use, the mobile terminal generates authentication information and sends a current use status of the first virtual device to the server for authenticating and is returned to with a authentication result. The present invention improves the security by adding the authentication with respect to the authority information during the authorization of generating the virtual device and use of the virtual device.