Second-step welding chamber of porthole die plays an important role in controlling metal flow and improving the quality extrudate. In this article, using a condenser tube aluminum alloy extrusion profile as example, shape height second-step are selected design variables. Standard Deviation Velocity field bearing exit (SDV) is used objective function. By combining Box–Behnken experimental Design (BBD) with Response Surface Method (RSM), prediction model for SDV established. The optimized by...

With the recent rapid development of cloud computing technology, how to reduce costs a data center effectively has become an important issue. The study on virtual machine deployment mainly aims at deploying resources required by users physical server rationally and effectively. This paper proposes multi-population ant colony algorithm solve problems deployment. resource wastage energy consumption as optimization objectives, this uses multiple colonies for solution determines strategies...

The theory of traditional Chinese medicine (TCM) is an important part culture. In the long history, there are a large number excellent prescriptions, whose laws have been explored by many studies, but few works directly studied generation prescriptions. With rapid development deep learning, applications text using neural networks emerged. Prescriptions doctors' clinical experience and results also come from accumulated experience. So, it very feasible to apply learning techniques...

In this article, a subroutine that calculates die wear depth based on modified Archard's model was developed and then embedded into DEFORM-3D, with which the extrusion process of an aluminum alloy 7075 rod simulated. Useful information obtained from numerical simulation, including interface pressure, distribution instantaneous temperature, required force, depth, etc. The result shows parameters have multiple effects behavior. severest occurs at bearing entrance due to greatest deformation,...

Currently, the design of extrusion dies is usually carried out on basis experience and corrected after a number trial runs before becoming usable. Thus, it difficult to guarantee product quality productivity when profile structure complex, actual production has be stopped or postponed, especially for multihole dies. This work analyzes die producing an aluminum tube investigates effects layout portholes process. Firstly, four with three, six, seven, nine are designed, respectively. Then,...

Abstract˖The objective of aluminum alloy profile extrusion process and die design is to ensure the quality strength.But for large long cantilever profiles, conventional flat diversion usually cause damage or failure in area.Even through increasing thickness these areas, it still difficult strength life-time.With a as an example, fake porthole method decomposition technique are studied.The material flow velocity, temperature, particle track two different methods studied compared.Especially,...

The shape and function of micro-/nano-particles for loading drugs play an important role in the transportation process drug delivery system. This study successfully fabricated red blood cell (RBC)-mimicking Janus microparticles (JMPs) using double-needle electrospray, which contained porous Fe3O4 magnetic nanoparticles (MNPs) upconversion (UC) luminescent NaYF4:Yb3+,Er3+ exhibited a unique two-compartment structure. JMPs possessed excellent UC properties, as well good hemocompatibility...

Speech information is the most important means of human communication, and it crucial to separate target voice from mixed sound signals. This paper proposes a speech separation model based on convolutional neural networks attention mechanism. The magnitude spectrum signals, as input, has its high dimensionality. By analyzing characteristics network mechanism, can be found that effectively extract low-dimensional features mine spatiotemporal structure in mechanism reduce loss sequence...

Stable and monodisperse colloidal iron sulfide nanocrystal (FSNC) (<100 nm) inks were prepared directly from natural pyrite dust without any chemical conversion. After selective modification by octadecylxanthate, sedimentation behaviors of FSNCs reversibly regulated in different mixed organic solvents. In this way, efficiently separated out dust, stable FSNC then prepared. The applied drop coating semiconductor films, which the structure properties comparable with film classical...

Shot boundary detection (SBD) plays an important role in content-based video retrieval. In this paper, a novel algorithm for SBD based on support vector machine (SVM) and genetic (GA) is proposed. First of all, features pixel domain compressed are synthetically extracted, then organized into multi-dimension by using the method sliding window. Following that, utilized to implement simulation iterative optimization towards parameters SVM kernel function, model trained approximately optimal...

Topology selection is an important issue for the design of network on chip systems. At present, typical application-specific NoC systems often integrate a number heterogeneous components which have varied functions, sizes and communication requirements. Instead regular topology networks are not suitable this sort systems, irregular mesh proposed applied in with structure. The routing algorithm guaranteed connected network. So paper, we introduce deadlock-free integrating oversized rectangle...

Sensor networks node deployment has long been a key problem in the research of wireless sensor networks. In order to reduce cost deployment, this paper proposed an optimised strategy for on basis dynamic ant colony algorithm, aiming at solving slow evolution and falling into local optimal solution frequently. The novel DACA, features integration heuristic factor, expectations evaporation pheromone global updating worst improve algorithm. Then greedy is introduced according distribution...

Rumor detection is widely used in Sina, Weibo, Twitter and other social media platforms. In recent years, the method based on graph neural network model has better performance than traditional rumor detection. However, real life, spread structure of a process changing over time. Before, most scholars only considered final without considering dynamic evolution structure. order to solve this problem, paper proposes time attention network. Firstly, aggregate propagation text features rumors at...

QoS routing problem in wireless mesh networks is a NP-complete problem, and it hard to get the global solution with traditional algorithm. In this paper, we adopt novel dynamic ant genetic hybrid algorithm solve unicast for network, whose innovation are using best melting point evaluation strategy control calling of two algorithms dynamically. Simulation results show that superior static quality efficiency network.

In this article we analysis the multi constrained quality of service routing (QoSR)model and a new QoSR algorithm based on combination simulated annealing cultured is proposed. The cultural has strong macro evolution capability, by using feature incorporated into framework culture algorithm. completes local searching process which converts individual solution to neighborhood transfers optimal set belief space can guide next generation after updating. simulation experiment demonstrates that...

Fault tolerance is an important issue for the design of interconnection networks. In this paper, a new fault tolerant routing algorithm presented and applied in mesh networks employing wormhole switching. Due to its low restrictions, so highly adaptive that it connected deadlock free spite various regions minimal virtual channels uses, only employs as few buffers possible suitable fault-tolerant with cost. Since chooses path around according local information, takes decisions quickly...

With the progress of society and rapid development computer technology, rumors arise on social media, which seriously affects economy. How to detect accurately rapidly has become one hot research topic. In this paper, a new early rumor detection model is proposed. The aim increase efficiency accuracy simultaneously. Specifically, in model, input data firstly refined through account filtering standardization, then BiGRU used consider context relationship, reinforcement learning algorithm...

More than 40 oncogenes associated with non-small cell lung cancer (NSCLC) have been identified varied gene expression.The correlations between specific clinical characteristics and oncogene expression in NSCLC patients were examined.From October 2011 to September 2012, a total of 60 (male:female, 34:24; mean age, 59.5 ± 10.6 years; age range, 31-81 years) diagnosed evaluated for treatment radical resection at single facility.Eligible exhibiting tumor node metastasis (TNM) stage I-III...

Fault tolerance is one of the most dominant issues for NoC systems. This paper presents a new fault tolerant routing algorithm network topology PRDT(2,1). The proposed converts region into rectangular in shape without disabling large number non-faulty nodes. It provides strong self-adaptability while utilizing as few virtual channels possible. As result, connection keeps unchanged only if does not break by regions. In addition, it has been shown that can guarantee and deadlock-free network....