Many ``real-world'' networks are clearly defined while most ``social'' networks are to some extent subjective. Indeed, the accuracy of empirically-determined social networks is a question of some concern because individuals may have distinct perceptions of what constitutes a social link. One unambiguous type of connection is sexual contact. Here we analyze data on the sexual behavior of a random sample of individuals, and find that the cumulative distributions of the number of sexual partners during the twelve months prior to the survey decays as a power law with similar exponents $\alpha \approx 2.4$ for females and males. The scale-free nature of the web of human sexual contacts suggests that strategic interventions aimed at preventing the spread of sexually-transmitted diseases may be the most efficient approach.

The Web of Human Sexual Contacts

Optimal control of an SIVRS epidemic spreading model with virus variation based on complex networks

Embodiments of the present disclosure provide a data transmission method and a device, and the method includes: determining synchronization header indication information indicating a frame header location of a first code stream, where the first code stream is obtained by encoding CPRI service data; decoding the first code stream to obtain a second code stream, where the first code stream is a 10B code stream, and the second code stream is an 8B code stream, or the first code stream is a 66B code stream, and the second code stream is a 64B code stream; inserting frame header indication information indicating a frame header location of the second code stream into the second code stream according to the synchronization header indication information; and mapping the second code stream and the frame header indication information into an OPU in an ODU frame.

Data transmission method and device

The invention provides a method and system for assisting in disease diagnosis on the basis of intelligent inference, and relates to the field of computers. The method comprises the steps that input information of a user is obtained and analyzed, effective information in the input information is stored, the information matching degree of the effective information in a case library and the rule coverage rate of the effective information in a rule library are calculated, weighted summation is conducted on the information matching degree and the rule coverage rate, and an explaining value p of each disease in a disease library for the input information is obtained; diseases corresponding to the explaining values p are sorted according to the explaining values P, the disease of which the explaining value p is larger than or equal to a threshold value E serves as an initial inference conclusion to be returned to the user, inspection result information input by the user is obtained, diagnostic criteria, corresponding to the disease in the initial inference conclusion, in a book knowledge library are displayed to the user by combining the effective information. According to the method and system for assisting in the disease diagnosis on the basis of the intelligent inference, the process and form of an inquiry under the real scenario of clinical diagnosis are simulated, and the diagnosis result can be well explained.

Method and system for assisting in disease diagnosis on basis of intelligent inference

The invention discloses a library automatic debugging system based on the embedded technology and image processing. The library automatic debugging system comprises an image capture device, a central data processing device, a data transmitting device, a data distribution device and a data display device. The embedded technology is applied to control a stepping motor to drive cameras fixed on sliding blocks to capture images of books on book shelves in real time, name recognition is performed on the books through the image recognition technology, dependence on index numbers is removed, information of books at wrong positions can be found, stored in a database in time and pushed to a client side, and automatic capture of the book images, automatic recognition of the book images, automatic finding and storage of the information of books at wrong positions and automatic pushing of the information of books at wrong positions can be achieved. The library automatic debugging system can help librarians to acquire the information of books at wrong positions, and book management efficiency is increased.

Library automatic debugging system based on embedded technology and image processing

The invention discloses an oral diagnosis and treatment decision support system The oral diagnosis and treatment decision support system comprises a case storage module, a case library construction module, a case extraction module and a case multiplexing module, wherein the case storage module is used for storing patient information; the case library construction module is used for extracting case reasoning based key information to construct a two-stage structure case library; the case extraction module is used for extracting a recommended case closest to a current case; and the case multiplexing module is used for multiplexing the recommended case to provide a decision basis for a decision of the current case The invention further discloses a decision method for the oral diagnosis and treatment decision support system at the same time With the adoption of the system and the method provided by the invention, the obtained recommended case can automatically provide a decision reference for different oral cases to meet an individual diagnosis and treatment decision in a clinical diagnosis and treatment process; and meanwhile, the system has the advantages of high screening speed and high case recommendation precision

Oral diagnosis and treatment decision support system and decision method

The invention discloses an embedded type system and method for checking books being placed on a shelf disorderly based on a DSP. The system for checking the books being placed on the shelf disorderly based on the DSP is composed of a data acquisition module, an image processing module, a wireless communication module and a checking module based on a library automation system ILASIII. According to the embedded type system and method for checking the books being placed on the shelf disorderly based on the DSP, books on the shelf in a library can be checked automatically, the structure of adopted hardware is simple, the code of software is small, and the system for checking books being placed on the shelf disorderly based on the DSP has the advantages of low power consumption, strong real-timeness, microminiaturization, low cost and the like. Further, the book checking and storing work in a modern large-circulating library can be finished quickly.

Embedded type system and method for checking books being placed on shelf disorderly based on DSP

Recent researches find that there are tight relations between virus variation and epidemic. Creature evolution, ecological environment and medical sources will lead to epidemic variation in the spreading process. Complex networks portray a multitude of interactions through which infectious diseases propagate in a society. In order to study the dynamics of epidemic spreading with virus variation, a new epidemic spreading SIVR model (Susceptible-Infective-Variant-Recovery) is proposed. This model extends the classical Susceptible-Infectious-Recovery (SIR) epidemic spreading model with considering variation affection of two different virus in the process of epidemic spreading. Mean-field equations of SIVR model are derived by describing the dynamics behaviors of the variable virus in complex networks. Then steady-state analysis for this model is conducted to investigate the process of epidemic spreading under different spreading rate, recovery rate, variant rate, and the average degree of networks. Meanwhile, different epidemic immunization strategies are discussed for the immunization threshold in homogeneous networks. Numerical simulations are conducted to illustrate the relationship between the factors of the epidemic spreading. The results play an important role in preventing and controlling the spreading of variable virus.

Novel SIVR epidemic spreading model with virus variation in complex networks

The invention discloses an embedded high-definition video acquisition and data stream transmission system. Based on a Samsung S5P6818 core board, an OV5640 camera integrated board card is adopted to acquire high-definition image data, a multimedia hardware codec integrated in the core board is adopted to carry out compressed encoding on the image, an algorithm processing algorithm is used to extract image features, and a real-time video and a feature parameter data stream are published in a local area network through a streaming media server built on the board. Thus, a remote PC client can receive the video streaming data and the image feature parameter data, and through decoding, display and local storage, functions such as historical query are supported.

Embedded high-definition video acquisition and data stream transmission system

The invention discloses a mineral flotation froth image texture analysis and working condition identification method based on the Minkowski distance. The method includes the steps that firstly, froth image samples of mineral froth flotation under different working conditions are acquired and preprocessed; then, the preprocessed froth image samples are segmented through a watershed segmentation algorithm, each froth size is counted and acquired so that parameters in a Minkowski distance formula can be determined, a complex network model of froth images is established, and the energy and the entropy of the model are calculated and serve as froth image texture description indexes; finally, the acquired froth image texture description indexes serve as feature vectors of the image samples and a linear discriminant classifier is trained, so that the tested image samples are classified, and the working condition in the rear-time flotation process is identified. According to the method, calculation is simple, classification is high in accuracy, and the method can be used for real-time monitoring of the texture feature extraction, the classification identification and the flotation process working condition of the mineral flotation froth images.

Su Zhifang

Papers

Oral diagnosis and treatment decision support system and decision method

Embedded type system and method for checking books being placed on shelf disorderly based on DSP

Novel SIVR epidemic spreading model with virus variation in complex networks

Embedded high-definition video acquisition and data stream transmission system

Mineral flotation froth image texture analysis and working condition identification method based on Minkowski distance