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Superblock (file Systems)
Superblock may refer to: Urban planning * Superblock (urban planning), a type of city block that is much larger than a traditional city block ** Superblock (University of Minnesota), a section of the Health area in the East Bank of the Minneapolis campus, US ** Superblock, a former large area formed after urban renewal in the cityscape of Huntington, West Virginia, US Computing * Superblock (file system), a segment of metadata describing the file system on a block device, as in the Unix File System * Superblock, in the density matrix renormalization group numerical technique * Superblock algorithm, in the pairwise summation numerical analysis * Superblock, of pixels, for example in the AV1 video coding format, or VP9 * Superblocks, of memory in the Hoard C dynamic memory allocation See also * Superblock scheduling, a type of instruction scheduling {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superblock (urban Planning)
A city block, residential block, urban block, or simply block is a central element of urban planning and urban design. A city block is the smallest group of buildings that is surrounded by streets, not counting any type of thoroughfare within the area of a building or comparable structure. City blocks are the space for buildings within the street pattern of a city, and form the basic unit of a city's urban fabric. City blocks may be subdivided into any number of smaller land lots usually in private ownership, though in some cases, it may be other forms of tenure. City blocks are usually built-up to varying degrees and thus form the physical containers or "streetwalls" of public space. Most cities are composed of a greater or lesser variety of sizes and shapes of urban block. For example, many pre-industrial cores of cities in Europe, Asia, and the Middle East tend to have irregularly shaped street patterns and urban blocks, while cities based on grids have much more regular arran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superblock (University Of Minnesota)
The University of Minnesota, formally the University of Minnesota, Twin Cities, (UMN Twin Cities, the U of M, or Minnesota) is a public land-grant research university in the Twin Cities of Minneapolis and Saint Paul, Minnesota, United States. The Twin Cities campus comprises locations in Minneapolis and Falcon Heights, a suburb of St. Paul, approximately apart. The Twin Cities campus is the oldest and largest in the University of Minnesota system and has the ninth-largest main campus student body in the United States, with 52,376 students at the start of the 2021–22 academic year. It is the flagship institution of the University of Minnesota System, and is organized into 19 colleges, schools, and other major academic units. The Minnesota Territorial Legislature drafted a charter for the U of M as a territorial university in 1851, seven years before Minnesota became a state. Today, the university is classified among "R1: Doctoral Universities – Very high research activity ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cityscape Of Huntington, West Virginia
Huntington, West Virginia's central business district is located to the south of the Ohio River, east of the Robert C. Byrd Bridge, and west of Hal Greer Boulevard. Broad avenues and streets dominate the streetscape, creating for the most part an even grid pattern. Another business district is in Old Central City, known for its numerous antique shops and Heiner's Bakery. Several major industries line the river, from the Steel of West Virginia industrial complex next to Marshall University to Special Metals, located along the Guyandotte River in the Altizer neighborhood. The proximity of the Ohio River played an important role in the development of heavy industry in the 19th and 20th centuries. The Rust Belt deindustrialization era of the 1970s led to a decline in the industrial base and, subsequently, Huntington's population. The saving grace, in terms of employment, has been the steadily growing service sector. Two major hospitals, St. Mary's and Cabell-Huntington, have seen ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superblock (file System)
The Unix file system (UFS) is a family of file systems supported by many Unix and Unix-like operating systems. It is a distant descendant of the original filesystem used by Version 7 Unix. Design A UFS volume is composed of the following parts: * A few blocks at the beginning of the partition reserved for boot blocks (which must be initialized separately from the filesystem) * A superblock, containing a magic number identifying this as a UFS filesystem, and some other vital numbers describing this filesystem's geometry and statistics and behavioral tuning parameters * A collection of cylinder groups. Each cylinder group has the following components: ** A backup copy of the superblock ** A cylinder group header, with statistics, free lists, etc., about this cylinder group, similar to those in the superblock ** A number of inodes, each containing file attributes ** A number of data blocks Inodes are numbered sequentially, starting at 0. Inode 0 is reserved for unallocated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Density Matrix Renormalization Group
The density matrix renormalization group (DMRG) is a numerical variational technique devised to obtain the low-energy physics of quantum many-body systems with high accuracy. As a variational method, DMRG is an efficient algorithm that attempts to find the lowest-energy matrix product state wavefunction of a Hamiltonian. It was invented in 1992 by Steven R. White and it is nowadays the most efficient method for 1-dimensional systems. The idea behind DMRG The main problem of quantum many-body physics is the fact that the Hilbert space grows exponentially with size. In other words if one considers a lattice, with some Hilbert space of dimension d on each site of the lattice, then the total Hilbert space would have dimension d^, where N is the number of sites on the lattice. For example, a spin-1/2 chain of length ''L'' has 2''L'' degrees of freedom. The DMRG is an iterative, variational method that reduces effective degrees of freedom to those most important for a targe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pairwise Summation
In numerical analysis, pairwise summation, also called cascade summation, is a technique to sum a sequence of finite-precision floating-point numbers that substantially reduces the accumulated round-off error compared to naively accumulating the sum in sequence. Although there are other techniques such as Kahan summation that typically have even smaller round-off errors, pairwise summation is nearly as good (differing only by a logarithmic factor) while having much lower computational cost—it can be implemented so as to have nearly the same cost (and exactly the same number of arithmetic operations) as naive summation. In particular, pairwise summation of a sequence of ''n'' numbers ''xn'' works by recursively breaking the sequence into two halves, summing each half, and adding the two sums: a divide and conquer algorithm. Its worst-case roundoff errors grow asymptotically as at most ''O''(ε log ''n''), where ε is the machine precision (assuming a fixed condition ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C Dynamic Memory Allocation
C dynamic memory allocation refers to performing manual memory management for dynamic memory allocation in the C programming language via a group of functions in the C standard library, namely , , , and . The C++ programming language includes these functions; however, the operators and provide similar functionality and are recommended by that language's authors. Still, there are several situations in which using new/delete is not applicable, such as garbage collection code or performance-sensitive code, and a combination of malloc and placement new may be required instead of the higher-level new operator. Many different implementations of the actual memory allocation mechanism, used by , are available. Their performance varies in both execution time and required memory. Rationale The C programming language manages memory statically, automatically, or dynamically. Static-duration variables are allocated in main memory, usually along with the executable code of the pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Generic Framing Procedure
{{Unreferenced, date=December 2009 Generic Framing Procedure (GFP) is a multiplexing technique defined by ITU-T G.7041. This allows mapping of variable length, higher-layer client signals over a circuit switched transport network like OTN, SDH/SONET or PDH. The client signals can be protocol data unit (PDU) oriented (like IP/ PPP or Ethernet Media Access Control) or can be block-code oriented (like Fibre Channel). There are two modes of GFP: Generic Framing Procedure - Framed (GFP-F) and Generic Framing Procedure - Transparent (GFP-T): * GFP-F maps each client frame into a single GFP frame. GFP-F is used where the client signal is framed or packetized by the client protocol. * GFP-T, on the other hand, allows mapping of multiple 8B/10B block-coded client data streams into an efficient 64B/65B block code for transport within a GFP frame. GFP utilizes a length/ HEC-based frame delineation mechanism that is more robust than that used by High-Level Data Link Control (HDLC), which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
