78 results about "Strong reference" patented technology

A method for managing memory, comprising: maintaining a strong reference count for a first object; establishing a first reference from the first object to a second object; establishing a second reference from the second object to the first object, wherein the second reference is a weak reference that does not increase the strong reference count of the first object; detecting that the strong reference count of the first object has reached zero; in response to detecting that the strong reference count has reached zero, invoking a corresponding action.

A system and method are described for managing session lifecycles within a multi-tiered enterprise network. In one embodiment, a plurality of session objects are generated at different layers of the enterprise network in response to a client request. Each of the session objects store session data defining a state of interaction with the client. In addition, one embodiment of the invention manages the lifecycle of a first session object based on corresponding lifecycles of one or more related session objects and also the type of relationship existing between the first session object and the one or more related session objects. In one embodiment, the defined relationship types include strong references, weak references, and soft references.

The invention discloses a quantum key distribution system and method based on time-slot mixed active polarization compensation. The quantum key distribution system comprises a transmitting terminal, an optical signal generation module, a polarization modulator, a synchronous signal generator, a wavelength division multiplexing module, a wavelength division multiplexing solution module, a synchronous signal receiver, a polarization demodulator, a signal detection module and a receiving terminal. According to the quantum key distribution system and method, adopted reference light pulse signals and quantum pulse signals have the same wavelength, the magnitude of single pulse energy of the reference light pulse signals is far larger than the magnitude of single pulse energy of the quantum pulse signals, and the magnitude can be detected through a photoelectric detector. The reference light pulses do not need to be accumulated repeatedly to calculate sums when the detection is carried out, and the polarization compensation rate can be greatly promoted. After the active polarization compensation, and different polarization codes are detected based on a unified polarization detection device, so the quantity of SPAD can be reduced. An optical switch is utilized to carry out switchover on a detection light path, the phenomenon that the strong reference light pulse signals directly impact the SPAD, and therefore communication quality of quantum signals can be guaranteed.

The invention discloses a lithium iron phosphate battery high-temperature life accelerated test method. A formed lithium iron phosphate battery is taken, and initial capacity test, initial accelerated test and cyclic accelerated test are carried out. Cyclic accelerated test refers to stepwise accelerated test at different temperatures and ends until the discharge capacity is less than 75% of the nominal capacity. The room-temperature discharge capacity of the last discharge cycle in the third step is converted into a capacity retention rate, and then, transformation is implemented according to a room-temperature life and high-temperature life transformation data table at a corresponding charging temperature to get the room-temperature life of the tested lithium iron phosphate battery. The lithium iron phosphate battery high-temperature life accelerated test method of the invention has the characteristics of high test accuracy, short test period, convenient test process, and strong reference.

One or more embodiments are directed to creating a structure comprising a weak reference to an object, a strong reference to the object, a count of remote references to the object, and an identifier for the object, incrementing the count when a remote reference is created to the object and decrementing the count when a remote reference is removed, setting the strong reference in response to the count being greater than a first threshold in order to avoid a garbage collection of the object, clearing the strong reference in response to the count being less than a second threshold to enable a garbage collection of the object, and removing the structure and related resources based on a recognition of the object's collection through the weak reference.

The present invention relates to a pollutant diffusion dynamic simulation method for water environment quality monitoring, and the pollutant diffusion dynamic simulation method comprises the following steps: establishing a river model; then calculating current concentration of pollutants in a measuring point in a zone according to a continuous stable emission model or an instantaneous emission model; and comparing the current concentration of the pollutants with environmental standards to determine a water quality grade, and applying a color to the zone in the river model. The pollutant diffusion dynamic simulation method is not limited by time and regions, more importantly, does not really cause water pollution, and pollutant diffusion conditions can be simulated at any time, so that strong reference information is provided for a best solution for plant location planning and urban development, according to different requirements, a number of parameters are set for the simulation of the pollutant diffusion conditions under different conditions so as to meet different needs.

The present invention provides a method for realizing wide-area distributed integrated flexible bus which is based on multi-agent technique and supports the wide-area multi-source automation system. The wide-area multi-source automation system is an integrated automation system which is composed of a plurality of agent subsystems which are distributed geographically and has independent self-government capacity. The data acquisition and processing function is dispersed to each agent subsystem. The resource adopts a method of unified database establishment and scattered distribution, and the data is simultaneously stored in a central system and the subsystem. The realizing method of the invention provides a unified data communication support platform for the integrated automation system. Themethod of the invention has strong reference significance for developing the basic platform of the large-scale automation systems of power transmission-control integrated system, distribution automation system, integrated supervisory control system of rail transit, etc. with function distribution and geographical distribution property.

The invention discloses a catering industry dish sales predicting method based on deep learning. The method divides sales data according to the date of sales, and an ordinary working day sales predicting model and a holiday sales predicting model are established respectively. When the dish sales is predicted, the ordinary working day sales predicting model is used to predict the sales of ordinaryworking days in the future, and the holiday sales predicting model is used to predict the dish sales during holidays. According to the invention, the method performs well in both nonlinear data and holiday prediction, has the advantages of accurate prediction ability and strong robustness, and can fully reflect the regularity and characteristics of the dish sales. The predicting models can providea strong reference for the material purchase of an enterprise purchaser, and have a high application value.

The invention discloses an ANSYS CFX-based simulation method for a radial temperature field of an overhead line. The method comprises the following steps of S1, performing unit selection and material setting in an ANSYS CFX finite element model; S2, performing mesh division in the ANSYS CFX finite element model; S3, performing heat generation rate load application in the ANSYS CFX finite element model; S4, performing boundary condition application in the ANSYS CFX finite element model; and S5, performing solving in the ANSYS CFX finite element model. According to the method, the radial temperature distribution field of a lead wire under different current-carrying capacities is obtained by using ANSYS CFX, and the situation that the temperature difference between the surface layer temperature and the steel core layer temperature of an aluminum cable steel reinforced type lead wire is changed with a current is obtained through a high-current experimental method; relative errors are all within 5%; and therefore, the method is of relatively strong reference significance on a radial thermal field distribution method for stranded wires.

The invention discloses a direct current circuit breaker with opening current reducing effect and a direct current fault treatment strategy thereof. The direct current circuit breaker comprises a normal current flowing branch circuit, a current opening branch circuit, an energy consumption branch circuit, a super-conduction current limiter, a reactor and an isolation switch, wherein the normal current flowing branch circuit is formed by connecting a super-quick mechanical switch and a load transfer switch in series; the current opening branch circuit consists of a main circuit breaker; the energy consumption branch circuit consists of a lightning arrester; the load transfer switch is formed by connecting a plurality of submodules with bidirectional current flowing ability in series and parallel; the main circuit breaker is formed by connecting a plurality of enhanced semi-bridge submodules in series and parallel. The direct current circuit breaker has the advantages that the ascendingspeed and amplitude of the fault current are inhibited by the super-conduction current limiter, and then the opening current of the circuit breaker is reduced; the number of the submodules of the maincircuit breaker is greatly reduced, the engineering cost and operation loss are greatly reduced, and the strong reference meaning and use value in the engineering are realized.

A reference mark configuration for an interferometric miniature grating encoder readhead using fiber optic receiver channels is provided. The readhead may include primary fibers that provide reference mark primary signals processed to generate a reference signal with accuracy of approximately 0.2 microns. In some embodiments, a zone grating type reference mark may be embedded in a periodic scale grating, and configured such that it provides strong reference mark primary signals without disrupting periodic incremental measurement signals associated with the periodic scale grating. In one embodiment, the readhead may include secondary fibers used to generate reference mark secondary signals processed to generate a reference signal with accuracy of approximately 20 nanometers.

The invention discloses an automatic management method of an object cached in a memory. The automatic management method comprises the following steps: simultaneously putting the object, which is put into a memory cache, into a strong reference queue and a weak reference queue; when accessing the object, searching whether the object exists in the strong reference queue first, and if the object exists in the strong reference queue, returning; if the object does not exist in the strong reference queue, continuously searching whether the object exists in the weak reference queue; if the object is searched in the weak reference queue, adding the object from the weak reference queue into the strong reference queue; and if the object is not searched in the weak reference queue, establishing the object, and caching the object into the strong reference queue. According to the method disclosed by the invention, only one object exists in the memory within the same time, so that re-establishment of the object is avoided. The invention provides an automatic recycling mechanism of the memory; and no object is actively released from outside. By means of monitoring the weak reference queue, the object with memory leak can be found.

The invention is suitable for a detecting technique for the internal structure of jewelry and particularly provides a non-contact detecting device for the internal structure of the jewelry. The detecting device provided by the invention comprises a light source component, an optical splitter, a reference arm reflector, a photoelectric detector, a signal processing analyzer, a reference arm reflector scanning device and a sample device arm light beam scanning device, wherein the reference arm reflector is fixed on the reference arm reflector scanning device which can make a reciprocating motion; the optical connection exists between the light source component and the input end of the optical splitter, between the two output ends of the optical splitter and the reference arm reflector as well as the jewelry to be measured and between the interference light output end of the optical splitter and the photoelectric detector; and the output end of the photoelectric detector is connected with the electric signal processing analyzer. The detecting device provided by the invention utilizes an optical interference principle to interfere the weak back scattered light and strong reference light of the internal structure of the jewelry, detects the internal structure of the jewelry through detecting interference light signals and greatly improves the detection signal-to-noise ratio and the sensitivity.

The invention discloses an image data caching method. The image cache is realized through memory cache and SD(Secure Digital) card cache. The memory cache comprises two levels of cache, and the SD card cache comprises a layer of cache. The specific realization process is that firstly a caching space is opened up in the memory, the cache stores the data through a strong reference type, the caching space is an eighth of the memory allocated for each application; a second-level caching space is opened up in the memory, so as to store the cache removed from the first-layer memory through the soft reference type; then a catalogue is established in the SD card to store the image data obtained through network request; and finally the data are read. Compared with the prior art, the image data caching method has the advantages of realizing a caching method including the memory cache and the SD card cache through LRU(Least Recently Used) algorithm, being capable of conveniently and rapidly showing the cached image in UI(User Interface) interface, improving user experience, saving flow and strong practicability.

The invention discloses a Java object reference method, Java object reference devices and a medium, which are used for solving the program crash problem due to that strong references cannot be automatically released and cause excessive occupied memories. The Java object reference method includes: when an intermediate variable object receives a reference request of requesting a reference of a second variable object by a first variable object, utilizing the intermediate variable object to invoke the second variable object according to the reference request, wherein the intermediate variable object is defined for the first variable object and the second variable object of which a strong-reference relationship exists; for the intermediate variable object, monitoring whether a preset releasingcondition is met; and invoking a releasing function to release the intermediate variable object when the preset releasing condition is met.

Embodiments of the invention disclose a memory management method and apparatus, and an electronic device. The method comprises the steps of obtaining a registration request of a first receiving objectas a strong reference object; converting the first receiving object into a second receiving object as a weak reference object, wherein the second receiving object is a receiving object after the first receiving object is wrapped with a weak reference shell; if the second receiving object does not exist in a preset receiving object set, adding the second receiving object to the receiving object set; and when memory resources are in shortage, recovering the first receiving object wrapped with the weak reference shell in the receiving object set. A monitor as a message receiving object is converted into the weak reference object; and when the memory resources are in shortage, the message receiving object can be recovered, so that the message receiving object not subjected to de-registrationstill can ensure that a system can perform memory recovery on the message receiving object at a moment, and the purpose of solving the problem of memory leakage is achieved.

The invention discloses a cache-based list processing method on an android platform. The cache-based list processing method on the android platform comprises the following steps that S100, two levels of cache are set, wherein the first level of cache is LinkedHashMap<String, Bitmap>, and the second level of cache is ConcurrentHashMap<String, SoftReference<Bitmap>>; S200, the first level of cache reserves the strong reference of Bitmap through the LinkedHashMap<String, Bitmap>, and the size of cache is controlled to be MAX_CAPACITY=10; S300, when data continue to be stored in the cache, the least and recently used elements in the first level of cache are put into the second level of cache ConcurrentHashMap<String, SoftReference<Bitmap>>, and SoftReference of Bitmap is reserved in the second level of cache. The user experience is improved, and resources are saved.

An improved system and method for data mining messaging systems to discover references to companies with job opportunities matching a candidate is provided. The system and method disclosed may receive messages from messaging systems of a candidate and may construct a reference graph and a company graph that may provide a mapping to match a candidate with job opportunities identified from companies with a relationship to references. Job opportunities identified from the companies may be ranked by a match score weighted by a referral score. The system and method may thus rank job opportunities at those companies for a candidate where there is a relevant job for the candidate and the strongest references for the candidate. A list of job matches to the candidate that includes a list of references ordered by reference strength for each job match may be served for display to the candidate.

The invention relates to a method of estimating and evaluating the emission law of a pollution source by using the internet of things; the method comprises the following steps of: connecting an internet-of-things controller and a coherent unit; collecting, analyzing and storing data through a longitudinal intelligent kernel; communicating an administrative department and a pollution discharging unit by using a transverse intelligent kernel; pre-analyzing through a dominant intelligent kernel and displaying analysis results; and analyzing pollution discharging information through a latent intelligent kernel to construct a mathematical model. The internet-of-things controller for estimating and evaluating the emission law of the pollution source comprises the longitudinal intelligent kernel, the transverse intelligent kernel, the dominant intelligent kernel and the latent intelligent kernel and has the advantages of convenience for centralized management, low failure rate, free communication of all parts in a system, strong reference of monitoring indexes, and reasonable and correct evaluation, analysis and prediction on the pollution source influence.

The invention discloses a L1 norm method based on a TOA positioning mode in a mixed LOS/NLOS scenario, and the method comprises the following steps of establishing basic positioning equations of a receiver by distance observation values and known coordinates of the base station; sorting the distance observation values in ascending order; secondly selecting the positioning equation corresponding toa small distance observation value as a reference equation, performing difference calculation with other positioning equations, and finally converting into the standard form of least squares; constructing a minimum criterion of the L1 norm based on the least squares expression form, so as to solve by using a CVX software toolbox to obtain the high-precision positioning coordinates of the receiver; finally determining whether the current reference equation is correctly selected according to the ratio of the maximum value to the median value in the positioning absolute value residual vector, and determining whether the current positioning result is the most appropriate. The method is very simple and stable in performance, can greatly reduce the impact of NLOS errors on the positioning algorithm, and can also have a very strong reference value for industrial applications.

The invention discloses a DC circuit breaker based on a serial-in capacitor and a DC fault handling strategy thereof. The DC circuit breaker includes a normal through-current branch, a main transfer branch, a cut-off branch, a reactor, and a disconnecting switch. The normal through-current branch is composed of an ultra-fast mechanical switch and a load transfer switch connected in series. The main transfer branch is composed of a main circuit breaker. The cut-off branch is composed of a thyristor valve group and a centralized capacitor connected in series. The load transfer switch is composedof a plurality of sub modules with bidirectional through-current capacity in series-parallel connection. The main circuit breaker can be composed of a plurality of reduced half-bridge sub modules inseries-parallel connection. The nature of a fault current is changed by using a capacitor, and thus, the fault current can be blocked. Moreover, fewer IGBTs are used, and the engineering cost and theoperation loss can be greatly reduced. The DC circuit breaker based on a serial-in capacitor and the DC fault handling strategy thereof have strong reference significance and application value in engineering.

The invention provides a memory leak analysis method and a related device, which are used for analyzing memory leak and positioning an object with memory cyclic reference. The method comprises: obtaining strong reference objects of a target object, the strong reference objects being objects strongly referenced by the target object, the number of the target objects is at least i, the first target object being a monitored object with memory leakage, and the i target object being i -i target object; wherein the strong reference object is a target object; constructing a directed graph representing a strong reference relationship between the objects, the directed graph comprising nodes and directed edges, and different nodes representing different objects; wherein any two nodes associated with the directed edge comprise a starting point and a terminal point, and the object represented by the terminal point is a strong reference object of the object represented by the starting point; traversing nodes in the directed graph to determine whether the nodes in the directed graph form a loop or not; and if a loop is formed, positioning the object represented by the node onthe loop as an object causing memory leakage.

The invention provides a memory space recovery method and apparatus, and an electronic device. The method comprises the steps of loading a target resource to a device memory, wherein the target resource is subjected to strong reference by a system; if it is detected that the target resource meets a preset removal condition, removing the strong reference of the system to the target resource; and when it is detected that the device memory meets a preset recovery condition, recovering a memory space occupied by a resource not subjected to strong reference by the system in the device memory. According to the method, the apparatus and the electronic device, the system can be always in a full memory state, so that the loading efficiency is improved, the running speed of the system is increased, and the user experience is improved.