52 results about "IMG" patented technology

A bank select device has a plurality of addressable locations and a plurality of storage locations correlated to each other so that each storage location is correlated to plural addressable locations and each addressable location is correlated to one storage location. Each storage location contains a respective bank select. The addressable locations and storage locations are grouped into interleave patterns such that, for each pattern, there are Q storage locations and 2A addressable locations arranged in L sequential loops each containing Q sequentially addressable locations and a remainder loop containing R sequentially addressable locations, where L·Q+R=2A. A shunt defines a non-zero offset for each interleave so that each interleave commences with a different bank select and a complete rotation of all of the interleaves addresses each of the memory banks an equal number of times. The shunt (S) may be selected as mod(2A,Q), −Q+mod(2A,Q), ±1 or ±prime to , where −<S<+. The bank select is particularly useful for partially accessing rows of memory data to access data as cache lines.

The invention relates to a computer system and a corresponding method and a corresponding computer-readable medium according to the invention. The computer system is suitable for determining the result of a join. The computer system may be distributed system. The computer system comprises: a processing unit; a database coupled to the processing unit, the database comprising: a first table (R), and a second table (S), each of the first and second table being partitioned into at least two partitions, namely a respective first (R1, S1) and a respective second partition (R2, S2), the database being coupled to an application that, in operation, accesses the database according to an access pattern; and a database engine executable by the processor and communicatively coupled to the database, the database engine being configured for determining a join (R R[A]=S[A]S) between the first and the second table by: determining the results for a plurality of subjoins (R1 R[A]=S[A]S1, R2R[A]=S[A]S2, R1 R[A]=S[A]S2, R2 R[A]=S[A]S1); and combining (U) at least those determined results that are not empty(Ø). The database engine is further configured for determining the result of at least one of the plurality of subjoins by inferring from the access pattern of the application that this result is empty (Ø).

The invention relates to a decoding method of multi-cell, multi-user and multi-antenna system. The decoding method includes two steps. The first step is to design a training sequence header: a line (img file='dest_path_image 004.TIF' wi='13' he='16' / ) in front of (img file='2014106135712100004 dest_path_image 002.TIF' wi='24' he='24' / ) is set as the training sequence header, elements in the first line of (img file=' 53509 dest_path_image 002.TIF' wi='24' he='24' / ) are (img file=' dest_path_image 006.TIF' wi='8' he='16' / ) respectively, the lines from the second line of (img file=' 908332 dest_path_image 002. TIF' wi='24' he='24' / ) to (img file=' 688070 dest_path_image 004.TIF' wi='13' he='16' / ) are marked as (img file=' dest_path_image 008.TIF' wi='22' he='24' / ), wherein elements in (img file=' 270230 dest_path_image 008.TIF' wi='22' he='24' / ) can be (img file=' 22285 dest_path_image 006.TIF' wi='8' he='16' / ) or (img file=' dest_path_image 010.TIF' wi='21' he='16' / ), and vectors in all rows of (img file=' 844747 dest_path_image 008. TIF' wi='22' he='24' / ) are different from each other. The second step is to estimate a sent signal matrix (img file=' dest_path_image 014. TIF' wi='18' he='18' / ) through a received signal matrix (img file=' dest_path_image 012. TIF' wi='18' he='18' / ) on the basis of a system model. The decoding method achieves estimation of sent signals in the multi-cell, multi-user and multi-antenna system by aid of a few pilot signals on the condition that the receiving party does not know the channel state information.

A method for performing, in a single round of communication and by a distributed computational system, Secure MultiParty Computation (SMPC) of an arithmetic function ƒ:pk→p represented as a multivariate polynomial over secret shares for a user, comprising the steps of sharing secrets among participants being distributed computerized systems, using multiplicative shares, the product of which is the secret, or additive shares, that sum up to the secret by partitioning secrets to sums or products of random elements of the field; implementing sequences of additions of secrets locally by addition of local shares or sequences of multiplications of secrets locally by multiplication of local shares; separately evaluating the monomials of ƒ by the participants; adding the monomials to obtain secret shares of ƒ.

A computer processing system and method for reducing memory footprint that includes initiating, through at least one computer processor, a cryptography session utilizing an -degree isogeny arithmetic computation having chained computations therein. The cryptography session includes implementing a first iteration cycle, of a plurality of iteration cycles, and a implementing a remaining amount of the plurality of iteration cycles, each of the plurality iteration cycles computing isogenies using a compressed Z value to complete the -degree isogeny arithmetic computation. The first iteration cycle includes individually computing a plurality of sequentially occurring pivot points within the chained computations, implementing a Co-Z algorithm within the plurality of sequentially occurring pivot points to compute and store the compressed Z value on one of the plurality of temporary registers and computing a first isogeny of the -degree isogeny arithmetic computations using the compressed Z value.

A combination of an infrequently-called tiny multiplication unit and a “differential” unit that quickly computes T (n+1) basing on known T n. The schedule (how often the multiplication unit is called) can be considered as a parameter of the algorithm. The proposed architecture of the “differential” unit is efficient both in terms of speed (delay) and area (gate count).

In one embodiment, it is proposed a method for encrypting a plaintext M ∈, where is a DDH-hard group of prime order p. The method is executed by an electronic device, and is remarkable in that it comprises:obtaining a public key PK=(, N, g, h, X, H, G) where N is a RSA module, elements g, h are random elements belonging to said group , X=gxhy ∈, where elements x, y are random values from a ring p, and H, G are hash functions;obtaining two random elements r, s, each element belonging to the ring p;determining a vector being (C0, C1, C2)=(M.Xr, gr, hr);determining a proof π that logg(C1)=logh(C2), said proof comprising two components c, t′, with c=H(C0, C1, C2, gs, hs) and t′=s+c.r mod p;delivering a ciphertext C=(C0, C1, C2, π)=(C0, C1, C2, c, t′) ∈3×p2.

The invention discloses an image defogging method and a system. The method comprises steps that downsampling of a to-be-defogged original image I and a guiding image p is carried out; on the basis of a downsampling image, mean values muk and Pk<-> of the original image I and the guiding image p in a kernel function window, and a variance Qk<2> are resolved; on the basis of the mean values and the variance, a guiding filtering image qi of the downsampling image is resolved, namely transmissivity of the downsampling image; rising-sampling of the transmissivity of the downsampling image is carried out to acqurie fine transmissivity t of the original image; no-fog image recovery of the to-be-defogged image is carried out on the basis of the fine transmissivity. Through the method, not only can image details be guaranteed, but also efficiency is improved, and thereby practicality of the defogging technology is guaranteed especially in a mobile terminal.

A computer implemented method for encoding bits by qubits to perform information-theoretically secure quantum gate computation, according to which pairs of quantum bits consisting of a first qubit as an encoding of “0” and a second qubit as an encoding of “1” are randomly selected, such that the first and second qubits are orthogonal to each other as quantum states and are interchanged by a NOT gate. Each qubit rotating to a desired initial direction and then each rotated qubit is further rotated to its antipodal direction by applying a quantum NOT or CNOT gate to the each rotated qubit, without any knowledge about the desired direction. A unitary gate is further applied over the qubits, using an ancillary |0 qubit that creates an equally weighted superposition of the qubits.

Described is a system for mobile proactive secret sharing. The system utilizes a Secret-Share protocol to share, by server Pj, a secret s among a set of servers , such that a degree of polynomials used to share the secret s is d and a shared secret is denoted as [s]. A GenPoly protocol is used to cause the servers in the set of servers to generate l random polynomials of degree D. A Secret-Redistribute protocol is used to redistribute the shared secret [s] to a set of new servers ′. Finally, a Secret-Open protocol is used to open the shared secret [s].

Described herein are systems and techniques for privacy-preserving unsupervised learning. The disclosed system and methods can enable separate computers, operated by separate entities, to perform unsupervised learning jointly based on a pool of their respective data, while preserving privacy. The system improves efficiency and scalability, while preserving privacy and avoids leaking a cluster identification. The system can jointly compute a secure distance via privacy-preserving multiplication of respective data values x and y from the computers based on a 1-out-of-N oblivious transfer (OT). In various embodiments, N may be 2, 4, or some other number of shares. A first computer can express its data value x in base-N. A second computer can form an ×N matrix comprising random numbers mi,0 and the remaining elements mi,j=(yjNi-mi,0) mod . The first computer can receive an output vector from the OT, having components mi=(yxi Ni-mi,0) mod .

The present invention provides a network coding TCP decoding method and device based on feedback. The method includes: when receiving a TCP data packet sent by the TCP layer, the sending end performs the encoding packet that needs to be sent currently according to the packet loss rate of the current link. The number Sn is updated; according to the feedback information carried in the response message sent by the receiving end received at the current moment, the current number of encoding window locks Ln is determined; if the current number of encoding window locks Ln is not 0, the encoding window is fixed , and the W TCP data packets in the encoding window will be encoded according to the number of packets Perform preset encoding, and encode the encoded packets are sent to the receiver. The present invention can not only generate active compensation according to the network environment, but also make corresponding adjustments based on the feedback to speed up the full rank of the decoding matrix and reduce the decoding waiting time delay.

A method for calculating a conversion parameter of the Montgomery modular multiplication to improve the efficiency of software installation, comprising a first step for calculating H0=2v×R (mod n) (where v is an integer, v≧1, and (m×k) / v is an integer), a second step for calculating Hp=2v×2<?img id="custom-character-00001" he="3.13mm" wi="2.12mm" file="US20060235921A1-20061019-P00900.TIF" alt="custom character" img-content="character" img-format="tif" ?>p×R (mod n) from H0=2v×R (mod n) by repeating Hi=REDC(Hi-1, Hi-1)n with respect to i=1, 2, . . . , p (where p represents an integer satisfying the condition 2p≧(m×k) / v>2p−1, REDC represents the Montgomery modular multiplication REDC(a, b)n=a×b×R−1 (mod n), and xˆi represents exponential computation xi); and a third step for calculating Hp=R2 (mod n) by calculating Hp=REDC(Hp, g)n with respect to Hp obtained in the second step when 2p>(m×k) / v (where g=2k×E(p,m,k), E(p, m, k)=2×m−(v×2p) / k) and finally outputting Hp as R2 (mod n).

The invention provides a method for judging the convex figure shape similarity in a digital image. The method comprises the steps of S1, for any two convex figure shapes omega 1 and omega 2 that are subjected to similarity judgment, respectively figuring out the complex plane feature vectors of the two convex figure shapes based on GCT transformation and recording the complex plane feature vectors thereof as F1 and F2; calculating the intensity sequences and the phase sequences thereof and respectively recording the intensity sequences and the phase sequences as M1, S1, M2 and S2; judging the similarity between the phase sequence S1 and the phase sequence S2; calculating according to img file='DDA0000901986470000011.TIF' wi='131' he='65', img file='DDA0000901986470000012.TIF' wi='1938' he='99', and img file='DDA0000901986470000013.TIF' wi='1123' he='98'; when delta is larger than 0.2, judging that the two convex figure shapes are not similar; S3, judging the similarity between the intensity sequence M1 and the intensity sequence M2; calculating according to img file='DDA0000901986470000014.TIF' wi='918' he='94', img file='DDA0000901986470000015.TIF' wi='1907' he='99', and img file='DDA0000901986470000016.TIF' wi='579' he='97'; when eta is larger than 0.2, judging that the two convex figure shapes are not similar; otherwise, judging that the two convex figure shapes are similar. The method is simple to realize and low in time complexity. The identification accuracy of the method is up to more than 90%.

The invention relates to the technical field of burning file manufacturing, and discloses a manufacturing method of an Android eMMC burning file. The manufacturing method comprises the following stepsof creating an initial eMMC burning file, wherein the initial eMMC burning file is an empty file; after compiling of the Android system is completed, generating an img mirror image file needed by each partition; obtaining the partition size size size of the img mirror image file of each partition, and calculating the offset address of the img mirror image of each partition in the burning file according to the partition size size size; converting the img mirror image file in the simg format into an img mirror image file in a raw format; and copying the img mirror image file of each partition to a corresponding initial position of the initial eMMC burning file according to the offset address by using a Linux dd command to obtain a final eMMC burning file. According to the method provided bythe invention, the technical problems that in the prior art, an eMMC burning file needs to be manufactured by a hardware platform, and the manufacturing mode is low in efficiency, high in cost and low in stability are solved.

The encoding and decoding of HOA signals using Singular Value Decomposition includes forming (11) based on sound source direction values and an Ambisonics order corresponding ket vectors (|(Ω5))) of spherical harmonics and an encoder mode matrix (Ξ0χs). From the audio input signal (|χ(Ωs))) a singular threshold value (σε) determined. On the encoder mode matrix a Singular Value Decomposition (13) is carried out in order to get related singular values which are compared with the threshold value, leading to a final encoder mode matrix rank (rfine). Based on direction values (Ωι) of loudspeakers and a decoder Ambisonics order (Nι), corresponding ket vectors (IY(Ωι)) and a decoder mode matrix (Ψ0χL) are formed (18). On the decoder mode matrix a Singular Value Decomposition (19) is carried out, providing a final decoder mode matrix rank (r find). From the final encoder and decoder mode matrix ranks a final mode matrix rank is determined, and from this final mode matrix rank and the encoder side Singular Value Decomposition an adjoint pseudo inverse (Ξ+)† of the encoder mode matrix (Ξ0χs) and an Ambisonics ket vector (Ia′s) are calculated. The number of components of the Ambisonics ket vector is reduced (16) according to the final mode matrix rank so as to provide an adapted Ambisonics ket vector (|a′ι). From the adapted Ambisonics ket vector, the output values of the decoder side Singular Value Decomposition and the final mode matrix rank an adjoint decoder mode matrix (Ψ)† is calculated (15), resulting in a ket vector (|y(Ωι)) of output signals for all loudspeakers.

The invention relates to a public key encryption method based on a finite field (shown in the formula in the specification) multiplication group, in particular to a public key encryption method basedon the finite field ( shown in the formula in the specification) multiplication group. wherein p is a prime number, and the formula (1) is shown in the specification, and p is a prime number and is made to be a Mesene number. Finite field isomorphism and polynomial field (img field RE-482803DEST _ PATH _ IMAGE001. TIF) isomorphism and polynomial field (img field RE-637709DEST _ PATH _ IM wherein the structural formula of the polynomial is as shown in the specification, the structural formula of the polynomial is as shown in the specification, and the structural formula of the polynomial is asshown in the specification, wherein the structural formula of the polynomial is as shown in the specification, and the structural formula of the polynomial is as shown in the specification. In the Finite field multiplication group wherein the order of the formula (I) is shown in the specification, the order of the formula (I) is shown in the specification, and the order of the formula (I) is shownin the specification. The order of the formula (II) is shown in the specification. Therefore, the order of the element a of any non-unit element is shown in the specification, wherein the order of the element a of any non-unit element is shown in the specification; the order of the element b of any non-unit element is shown in the specification; The invention discloses a public key cryptosystem.the receiver B discloses a random element a; the primitive polynomial q is used as a system parameter; the k1 is seen as a private key by the random number; A public key g (shown in the specification)is disclosed. An encryption party A generates a random number k2, and the random number k2 is smaller than or equal to 1 and smaller than or equal to 1. carrying out a modular exponentiation operation (shown in the formula in the specification), carrying out a modular exponentiation operation (shown in the formula in the specification), and carrying out a modular exponentiation operation (shown in the formula in the specification), carrying out modular multiplication on the encrypted plaintext m (shown in the formula in the specification), and carrying out modular multiplication on the encrypted plaintext m, The method comprises the following steps that: a decryption party receives a ciphertext, generates a ciphertext according to the ciphertext, and generates the ciphertext according tothe ciphertext. The decryption party receives the ciphertext and generates the ciphertext according to the ciphertext. and decrypting by using the private key k1 to obtain a plaintext m. The method disclosed by the invention can be applied to the aspects of symmetric passwords, public key passwords, digital signatures and the like. The method disclosed by the invention can be applied to the fieldsof the symmetric passwords, the public key passwords, the digital signatures and the like.

The invention discloses a firmware tamper-proofing method and device based on an Android system, and relates to the security technology, and the method comprises the following steps: reading a publickey from a CPU efuse; obtaining a signature of the boot.img file; obtaining a private key from the boot.img file according to the signature of the boot.img file; carrying out secret key matching on the public key and the private key, and reading an integrity check value of a preset file in the system. Im.img file from the boot. Img file under the condition that the secret key matching is successful; and performing integrity check on a preset file in the system. Img file according to the integrity check value, and starting the system under the condition that the integrity check is successful. According to the invention, the system firmware can be effectively prevented from being illegally tampered, and the user information security is ensured.

The invention discloses a method, system and device for installing a virtual machine operating system. The method comprises the following steps: obtaining a vmlinuz temporary file and an initrd.img temporary file; adding a kickstart configuration file and a configuration script file to an initrd.img temporary file; configuring paths of the vmlinuz temporary file and the initrd.img temporary file to a metadata configuration file of the virtual machine; when the virtual machine is started to enter an installation operation system, configuring a system kernel based on the vmlinuz temporary file in the metadata configuration file of the virtual machine, and configuring corresponding hardware equipment based on the kickstart configuration file and the configuration script file in the initrd.imgtemporary file to complete system installation. Therefore, according to the virtual machine operating system installation mode, a PXE server does not need to be deployed, installation of the virtualmachine operating system can be achieved only through a file configuration mode, and the application range is wide.

The invention discloses an operating system deployment method and device, electronic equipment and a computer readable storage medium. The method comprises the steps: determining a target operating system type and a target version which need to be deployed, and obtaining a target optical disc mirror image file of the target operating system corresponding to the target operating system type and the target version; determining all devices needing to be deployed, and storing driving information corresponding to the devices which are not supported by the target optical disc mirror image file into a temporary directory; and generating a universal initrd.img file based on the driving information in the temporary directory, so as to deploy the target operating system by using the universal initrd.img file. According to the operating system deployment method provided by the invention, the deployment of the equipment can be completed when the equipment lacks the support of a kernel driver.

The invention relates to a power-down protection method based on a universal computer operating system. The power-down protection method comprises the following steps: S1, acquiring an aufs file corresponding to an operating system version; S2, creating a folder to be downloaded; S3, adding the support of the kernel to aufs; S4, manufacturing initrd; and S5, generating a mirror image file initrd.img of the initrd. According to the power-down protection method based on the universal computer operating system, the data protection mode is flexible, system file safety is protected, and system fileprotection under the problems of instantaneous undervoltage, file system damage, accidental outage and the like can be achieved.

The invention provides an SPL rollback method and device based on UBOOT, a storage medium and a terminal. The SPL rollback method comprises the steps that: an MISC partition of the terminal is read, and OTA upgrading information of the terminal is obtained; the obtained OTA upgrading information is analyzed, and whether OTA upgrading is completed or not is judged; if the judgment result is that the OTA upgrade fails, the data in the SPL main partition is replaced with the data in the SPL standby partition, and the terminal is restarted to complete SPL rollback; and if the judgment result is that OTA upgrading is successful, SPL rollback does not need to be carried out. Whether normal startup can be carried out or not is detected in time after OTA upgrade by using the recognition characteristic of UBOOT on an A / B partition of an MISC partition, and after OTA upgrade failure is detected, the SPL main partition and the SPL standby partition are read and written in time, the data in the SPL main partition is replaced with the data in the SPL standby partition, and a terminal is restarted, so that the purpose of rollback of the SPL is achieved. The situation that the terminal fails to start due to the fact that the SPL main partition and the SPL standby partition are inconsistent is prevented, and then the situation that the terminal cannot be started due to the fact that the IMG is incompatible is prevented.