Abstract: The present disclosure provides a copper alloy material, a preparation method therefor and use thereof, and belong to the technical field of additive manufacturing. The copper alloy material provided by the present disclosure includes the following components by mass percentage: 2.0-7.0% of Cr, 1.0-5.0% of Nb, 0.1-2.0% of Ag, 0.1-0.7% of Zr, 0.02-0.3% of RE, and the balance of Cu. The RE includes the following components by mass percentage: 88-93% of La, 6-9% of Ce, 1.5-1.9% of Pr, and Nd less than or equal to 0.3%, and a sum of mass is 100%. By means of the synergistic effect among RE, Cr, Nb, Ag, Zr and Cu in the present disclosure, thermal conductivity, high-temperature creep property, high-temperature strength, and high-temperature fatigue of the copper alloy material are effectively improved, and the problem of poor high-temperature mechanical properties of a copper alloy material in the prior art is solved.

Abstract: An example method includes receiving, by one or more processing circuits, a registration request comprising an identifier and an activation gesture associated with a mobile application on a mobile device. The example method includes sending, by the one or more processing circuits to the mobile application on the mobile device, a notification indicating the mobile device is registered. The example method includes receiving, by the one or more processing circuits, a content item test request for content items in a specific content network. The example method includes testing, by the one or more processing circuits, the content items on the specific content network. The example method includes transmitting, by the one or more processing circuits to the mobile application on the mobile device, content event logs comprising debugging information of the content items during the testing on the content network.

Abstract: Systems, methods and computer-readable storage media can be used to debug content items. One example method includes presenting, by a mobile application executing on a mobile device, a first application interface. The example method further includes detecting, by the mobile device, a predetermined user action. The example method further includes, in response to detecting the predetermined user action, generating debugging information from content event logs, wherein the content event logs are associated with content item slots in which content items are presented in the mobile application and presenting, by a debugging interface, the debugging information.

Abstract: In some embodiments, an apparatus includes a housing defining an interior space, a sensor, and a processor. The sensor is configured to sense an indication generated by a compute device. The indication can be at least one of a visual indication, an auditory indication, or a vibratory indication. The processor can be configured to determine whether to transition a lock status of the apparatus from locked to unlocked based on the indication sensed by the sensor. The processor can initiate a transition of the lock status from locked to unlocked upon determining to transition the lock status.

Abstract: Systems, methods and computer-readable storage media can be used to debug content items. One example method includes presenting, by a mobile application executing on a mobile device, a first application interface. The example method further includes detecting, by the mobile device, a predetermined user action. The example method further includes, in response to detecting the predetermined user action, generating debugging information from content event logs, wherein the content event logs are associated with content item slots in which content items are presented in the mobile application and presenting, by a debugging interface, the debugging information.

Abstract: The invention provides a device and the use thereof in a cell experiment in vitro. This device has a polydopamine layer-carboxymethyl chitosan layer-peptide layer structure, which is capable of regulating behaviors of human pluripotent stem cells and is useful in cell culture or a cell experiment in vitro.

Abstract: The invention provides a device and the use thereof in a cell experiment in vitro. This device has a polydopamine layer-carboxymethyl chitosan layer-peptide layer structure, which is capable of regulating behaviors of human pluripotent stem cells and is useful in cell culture or a cell experiment in vitro.