33 results about "Compact Disc-Read Only Memory" patented technology

The invention discloses a virtual machine context setting method in a cloud computing environment, which includes the steps: firstly, making a virtual machine context configuration file into an ISO (isolation) mapping; next, mounting the ISO mapping by taking the ISO mapping as a CDROM (compact disc read-only memory) device of a virtual machine when the virtual machine is started; and then configuring the virtual machine by means of a virtual machine context configuration strategy. The virtual machine context refers to environment configuration information when the user uses the virtual machine, and can comprise network configuration, a user name, a password, a host name and other personalized settings. The virtual machine context configuration strategy refers to that the virtual machine context is configured as needed by adopting a uniform virtual machine context configuration file definition format according to different virtual machine context configuration items. In the method, the virtual machine context is configured by adopting the uniform virtual machine context configuration strategy and can be configured as needed, and a virtual machine context configuration process can be simplified, so that user experience is improved.

The invention relates to the technical field of internal and external network data physical isolation devices, in particular to an internal and external network data two-stage physical isolation ferrying device. The internal and external network data two-stage physical isolation ferrying device comprises an internal network server, an internal network compact disc read-only memory, an external network server, an external network recordable compact disc read-only memory, a transit server capable of conducting virus searching and killing operation, a transit compact disc read-only memory, a transit recordable compact disc read-only memory, a compact disc ferrying mechanism and compact disc read-only memory stacking frames capable of allowing hatch openings of two compact disc read-only memories to be placed perpendicularly in an overlapping mode. The compact disc ferrying mechanism comprises a movable arm capable of moving in a plane and in the direction perpendicular to the plane. A compact disc gripping device is fixedly installed at the bottom of the mobile arm. The two compact disc read-only memory stacking frames distributed in a spaced mode laterally are respectively arranged within the stroke range of the compact disc gripping device. According to the internal and external network data two-stage physical isolation ferrying device, attacks and infection of viruses can be effectively avoided, the security level of information transfer of the device is further improved, and the better confidentiality effect is achieved; the compact disc read-only memory stacking frames are additionally arranged, space can be effectively saved, the overall size is reduced, and the device is convenient to place.

The invention relates to a compact disc, a compact disc read-only memory (CD-ROM), a method for using the CD-ROM and a method for producing the compact disc. The compact disc is provided with a ringlike rail, and consists of an external compact disc adjustment region which is close to an outer edge region of the compact disc, wherein the external compact disc adjustment region comprises a standard external compact disc adjustment region and an additional external compact disc adjustment region, the compact disc further includes a compact disc message which indicates the attribute of the external compact disc adjustment region. The invention further relates to a CD-ROM for reading and writing in one compact disc, comprising a compact disc adjustment unit for adjusting the compact disc withone standard external compact disc adjustment region and the additional external compact disc adjustment region once at least, and a compact disc reading unit for reading the message of the compact disc, wherein the adjustment unit can adjust according to the message read from the compact disc. The invention further relates to a method for reading the compact disc and a method for producing the compact disc.

The invention relates to a heat dissipation module of a compact disc read-only memory driver core in an auto sound; the heat dissipation module is formed by a sound case; the sound case comprises an upper cover plate, a heat sink, a front cover plate, an upper shell and a lower shell, wherein the upper shell is arranged above the lower shell; the heat sink is connected at rear sides of the upper shell and the lower shell; an air outlet of a fan is arranged in the heat sink; an air vent is arranged in the upper cover plate; an air vent is arranged in a baseplate of the upper shell; and the air vents are communicated with the cavity of the lower shell; a heat insulation baffle is arranged at the back of the upper shell; the heat insulation baffle is vertical to the baseplate and is parallel to the heat sink at an interval; and the heat insulation baffle is arranged behind the air vents. Air vents are respectively arranged at two sides of the upper shell and the lower shell. The heat insulation baffle inhibits the transmission of heat from the heat sink to the driver core; air sucked by the fan forms two flowing air currents between the heat sink and the heat insulation baffle and between the heat insulation baffle and the compact disc read-only memory driver core, thereby further the transmission of heat to the core is blocked; the fan dissipates heat of a main board and simultaneously promotes the heat insulation of the compact disc read-only memory driver core, and the fan is utilized in a maximum degree.

The invention provides a compact disc read only memory (CD-ROM) pre-encryption method which comprises the following steps: a, logically encrypting source data; and b, recording a mother disc, wherein the step of burning a mother disc comprises the following substeps: b-1, reading the source data into a mother disc data system; b-2, modifying the burning program, so that the laser changes the burning pulse signal corresponding to an encrypted burning area, and the burning pulse signal can burn pits with the non-standard length of 15-25T in the encrypted burning area; and b-3, burning the mother disc by using the modified burning program, burning the pits with the non-standard length of 15-25T in the encrypted burning area, and burning in a normal mode in other normal data areas beyond the encrypted burning area. According to the method, the non-standard pits which cannot be identified by the CD-ROM are burned at the specific positions, and the encrypted burning area of the mother disc does not need to be burned again after the mother disc is burned, so that the process flow is simplified, and the encrypted optical disk is conveniently manufactured.

A compact disc read-only memory fixing device is used for fixing a compact disc read-only memory. The compact disc read-only memory comprises a first side wall and a second side wall which are opposite to each other, wherein two positioning holes are formed in the first side wall at an interval, and a fixing hole is formed in the second side wall. The compact disc read-only memory fixing device comprises a magnetic frame, a fixing part and an elastic part, wherein the magnetic frame comprises a baseboard and two first baffles which protrude from the baseboard and are propped against the first side wall of the compact disc read-only memory, the two first baffles are respectively provided with a positioning part for clamping into the corresponding positioning hole of the compact disc read-only memory, the fixing part can be slidably assembled on the baseboard along the direction of the second side wall of the compact disc read-only memory, a fixed column protrudes from the fixing part, the elastic part is connected between the magnetic frame and the fixed part and drives the fixing part to move towards the compact disc read-only memory, so that the fixed column is clamped into the fixing hole. According to the compact disc read-only memory fixing device, the two positioning holes of the compact disc read-only memory are clamped into the positioning parts of the two baffles, the fixed column of the fixing part is then clamped into the fixing hole of the compact disc read-only memory, so that the compact disc read-only memory can be fixed, and the device is convenient and quick.