Automated pavement distress detection benefits road maintenance and operation by providing the condition location of various rapidly. Existing work generally relies on manual labor or specific algorithms trained dedicated datasets, which hinders efficiency applicable scenarios methods. Street view map provides interactive panoramas a large scale urban roadway network, is updated in recurrent manner provider. This paper proposed deep learning method based pre-trained neural network...

To address the problems of artificial apple thinning, which are time-consuming, labor-intensive, and inefficient, this study examined fruit thinning effect mechanism spraying metamitron at young stage on Gala apples grown dwarfing inter-stocks. The results showed that 500mg·L-1metamitron twice, 3 mm 9 diameters, significantly reduced setting rate inflorescences flowers, thereby increasing single ratio. photosynthetic parameter (Pn) chlorophyll fluorescence parameters (Fv/Fm, ΦPSII, qP, NPQ)...

In view of the strict requirements current high-precision measurement system for stable output power semiconductor LD (Laser Diode), a drive and multi-closed-loop control are proposed after analyzing laser’s P–I (Power–Current) characteristics temperature characteristics. The uses microcontroller as core unit realizes laser by controlling current, parameters. this system, first, structure model controlled object has been designed. Second, controllable closed-loop constant feedback circuit...

In the cooperative vehicle infrastructure system (CVIS), due to limitation of deployment conditions, some roadside units (RSUs) need use renewable energy supply power and transmit fused sensor network’s data backbone network through passing vehicles. Aiming at problem consumption time delay guarantee multiple self‐powered RSUs in CVIS, a distributed packet scheduling optimization strategy for energy‐delay trade‐off is proposed. The can minimize by constraining queue length RSUs. A dynamic...

An elaborate poro-elastoplastic numerical model has been developed in this paper to explore the stability characteristics of wellbore shallow sediments deepwater oil/gas wells. The combined Drucker-Prager/cap plasticity is employed characterize mechanical behavior weakly consolidated or unconsolidated sediments, by which both plastic compaction deformation and shear can be considered. Possible penetration drilling fluid into formation its coupling have also accounted for model. Using model,...

Fault detection is a fundamental element for management, replication, load balancing, and other services of large-scale distributed systems. But the fault in such systems scale badly number members that are being monitored. This paper describes new protocol named Adaptive Randomized Gossip-based Detection service (ARGoFD) which based on gossiping does well provides timely detection. We gave out detailed description analyzed its main algorithms. At last we did comparison experiments. The...

Nowadays main infrastructure-as-a-service (IaaS) systems have been widely exploiting the template-based VM creation and template caching techniques to reduce startup latency of user service response time.Because new VMs created from templates do not always same software system as needed, further reconfigurations, that is, installing missing components removing undesired ones, must be made before can used by users.The reconfiguration time is also an important source latency.However, current...

Programming foundation is a course with very strong practicality. In order to promote students' programming practice ability, this article presents new teaching idea, online oriented teaching. This idea emphasizes particularly on impartment of elementary thoughts and methods in programming, cultivating practical ability through contest, practice, project, etc. Based redesigns the main contents course, including theoretic Lastly, summarizes some effective methods.

With the rapid development of cloud computing, virtualization technology has experienced considerable progress and application. Virtualization allows not only an application, but operating system hardware as well, to be encapsulated into a virtual machine (VM). Although been widely adopted in there are still many research issues fully addressed. Frequent occurrence VM outage incidents indicates that fault tolerant techniques needed achieve high availability computing infrastructure. This...

Coiled tubing (CT) is used as a velocity string to transport high-velocity gas in drainage recovery technology. Sand particles flowing at high speed can cause serious erosion of the pipe wall. Long-term wear leads degradation strength and even local perforation. In order study problem CT, gas–solid experimental device was established for full-size with different radii curvature. A 3D laser confocal technique examine characterize microscopic morphology inner wall CT. The CFD model selected...

Abstract Extended reach wells are drilled to develop the remaining oil in shallow formation just around 600~1400m China Bohai oilfield. The there is terrestrial sediment and heterogeneity strong, moreover, only water-based drilling fluid can be used as Bay an internal bay with weak self-cleaning ability. For these reasons, precise well trajectory control, wellbore cleaning, casing running cementing challenges this region. Facing problems above, a set of safe efficient technology for extended...

This poster will present a formal ontology of temporal entities for knowledge sharing and interoperability. captures the semantic intensions, attributes properties their relationships. And it has been applied into acquisition from un-annotated Chinese texts.

Currently, main Infrastructure-as-a-Service (IaaS) systems employ the template-based virtual machine (VM) deployment method in their data center to reduce startup latency of user VMs.However, because large size VM templates, usually, limited number them can be cached by each cluster servers an IaaS system.In face scale requirements VMs with various application purposes system, templates not support quickly deploying all deployed it.Hence, optimal caching management template is a challenging...

In this paper, an ultra-high resolution photoassociation spectroscopy study on of cesium atoms is reported. The cold gas in the magneto-optical trap illuminated by a laser with red-tuning as large 40 cm−1 below 6S 1/2 + 6P 3/2 dissociation limit, and to excited state ultracold molecule detected. High signal-to-noise ratio obtained using lock-in detection fluorescence from modulated Cs atoms. 0 g − , 1g u long-range states which correspond limit are present spectrum. effective coefficients...

An enhanced FDTD algorithm is proposed for simulating the electromagnetic interactions of light with gain medium characterized by a semi-quantum system 6 discrete energy-levels. The whole then consists 3 quantum-mechanics-corrected dipole oscmators coupled set appropriate rate equations allowing efficient simulations without complex quantum-mechanics calculations.

With the development and popularization of electric vehicles, charging demand for large-scale vehicles is an increasing challenge grid. Based on existing vehicle data, this paper establishes a model calculation estimates influence First, we established expanded it into station model. The used to calculate power single within 24 hours ratio vehicles. Since that equipped with piles do not strongly depend station, use SVM algorithm recognize these exclude them from data increase estimation...

Recommendation systems are the latest solution to solve information surplus in Internet era. However, mainstream recommendation models have problem of data sparsity and lack diversity. Therefore, this paper proposes a diversity algorithm based on multi-graph collaboration graph convolution neural networks (GCN) above problems. Specifically, we use user-item bipartite construct mine edge potential space, so as improve diverse node neighbourhood, model implicit characteristics users items,...