Considering the large burial depth and unclear coalbed methane (CBM) development potential of No. 15 coal seam in Shouyang block northern Qinshui Basin, this study investigated characteristics gas production capacity deep CBM reservoirs based on analysis geological simulation capacity. The has a thickness, strong adsorption capacity, medium content, low critical desorption pressure, reservoir ratio pressure to (also referred as ratio). Based reversible relationship between CBM, we...

Experimental research was conducted to clarify the wettability alteration mechanism in presence of metal cations. Wettability studied by measuring contact angle on a quartz–crude oil–water system. The quartz surface is aged an asphaltene/toluene solution study effect aging time, asphaltene concentration, water film surface, and cations surface. property characterized with ζ-potential measurements infrared (IR) spectroscopy mechanism. Results show that becomes more oil-wet increase...

Design space exploration (DSE) has become a notoriously difficult problem due to the exponentially increasing size of design microprocessors and time-consuming simulations. To address this issue, machine learning techniques have been widely employed build predictive models. However, most previous approaches randomly sample training set leading considerable simulation cost low prediction accuracy. In paper, we propose an efficient precise DSE methodology by combining statistical sampling...

As a multivariate time series, the prediction of curling trajectories is crucial for athletes to devise game strategies. However, wide range and complex data correlations present significant challenges this task. This paper puts forward an innovative deep learning approach, CasLSTM, by introducing integrated inter-layer memory, establishes encoder-predictor trajectory forecasting model accordingly. Additionally, tailored training techniques involving non-teacher-forcing, ExMSE loss...

Polymer gels have been successfully applied to control undesired water production for many years, however, due poor long-term thermal stability and salt tolerance, conventional polymer present some limitations application in high temperature salinity reservoirs. In this paper, an organic/inorganic combined gel composed of with low degree hydrolysis, phenol formaldehyde resin inorganic silicate was proposed developed. The effects concentration, on gelation time were studied. Long-term...

The risks faced by the mining industry have always been prominent for every walk of life in China. As direct cause accidents, individual unsafe behaviors are closely related to their risk perception. So, it is important explore factors affecting miners' perception and analyze influencing mechanisms between these questionnaire survey method was used collect data from nearly 400 respondents working metal mines Exploratory factor analysis confirmatory were process collected data. impact four...

The design space exploration (DSE) has become a major challenge in microprocessors due to the increasing complexity of microprocessor architecture and extremely time-consuming software simulation technology. To more effectively efficiently perform DSE, recently machine learning techniques are widely explored build predictive models with small set simulations. However, most previous supervised training samples randomly selected. Thus they still suffered from high cost or low prediction...

The IEEE 802.16's relay task group has introduced multi-hop station to the 802.16 wireless MAN networks, which are called mobile relay(MMR) networks. In this paper we consider one of MMR situations: fixed in two-hop networks and selection algorithm is centralized controlled by base (MR-BS). We propose a based on quality-of-service (QoS). compared with shortest distance simulation. simulation results show that proposed can improve performance system accordance signal to-noise-rate (SNR) latency.

Due to the exponentially increasing size of design space microprocessors and time-consuming simulations, predictive models have been widely employed in exploration (DSE). Traditional approaches mostly build a program-specific predictor that needs large number samples. Thus considerable simulation cost is required for each program. In this paper, we study novel problem transferring knowledge from labeled samples previous programs help predict responses new target program whose are very...

The Ziyuan3-03 (ZY3-03) satellite is an optical stereo mapping that able to synchronously provide triple linear-array images and discrete laser altimetry points (LAPs) for plotting 1:50 000-scale maps. Considering the relative horizontal error between ZY3-03 nadir image acquired LAPs very small, this study designed a technical method obtain accurate coordinates of on images, successfully overcomes shortcomings previous methods. Subsequently, combined block adjustment model was constructed....

China's rape acreage and total output of rapeseeds ranks among the top in world, accounting for more than 30% world's rapeseeds. This paper takes Landsat TM as main data source conducting study extracting information Shou County, Anhui Province. Through analysis calculations phenological diversity, spectral discrimination, etc. various vegetations, with remote sensing image each growth stages within studied area, this concludes that optimal time period extraction based on is flowering rape....

A novel pH-sensitive core−shell microsphere was synthesized by growing sodium acrylate as a shell on crosslinked polyacrylamide particles the core surface-initiated atom transfer radical polymerization. The structures and characteristics of microspheres were confirmed Fourier transform infrared spectroscopy, 1H NMR SEM, transmission electron microscopy AFM. viscosity size in response to changes pH value also investigated. As kind potential profile control flooding agent, performances...

The pH-triggered microgel (PTM) was synthesised with acrylic acid (AA) as monomer, triallyl pentaerythritol ether (TPE) cross-linking agent, ethyl acetate and cyclohexane solvent, bis-(2-ethylhexyl) peroxydicarbonate (EHP) initiator at 65°C. Structure of PTM determined by infrared spectrometry (IR). influences temperature, concentration electrolyte degree neutralisation on the viscosity were investigated. As a novel mobility-control product evaluated in terms percent permeability reduction...

Physical layer network coding (PNC), where relay node is allowed to process the superimposed signal directly, can improve throughput and spectral efficiency greatly. In this paper, we extent nearest neighbor approximation investigate symbol error rate (SER) of PNC over AWGN channels. SER for BPSK QPSK modulation derived, an algorithm designed calculate high order modulations. Simulation results validate derived expressions characterize performance

Abstract Introduction Feedback on human choices is important because it can affect risk‐taking and rationality in subsequent decisions. In daily life, are not always followed by immediate outcomes nor they simple, single‐dimensional feedback. Here, we seek to extend previous studies the effects of feedback three experiments. Methods We examine whether (1) effect immediacy participants’ exists tasks containing explicit probabilistic outcome values; (2) increasing dimensionality from one...

Abstract The Basic Vector Space Model (BVSM) is well known in information retrieval. Unfortunately, its retrieval effectiveness limited because it based on literal term matching. Generalized (GVSM) and Latent Semantic Indexing (LSI) are two prominent semantic methods, both of which assume there some underlying latent structure a dataset that can be used to improve performance. However, while this may derived from the space document space, GVSM exploits only former LSI latter. In article,...

In response to the growing requirements of traffic classification for increasing complex network environment, this paper introduces a hybrid method classification. By combining port-based, signature string matching, regular expression matching and machine learning methods, our can achieve high speed accurate Moreover, typical application is proposed identify encrypted in performance, which achieves 96.0% average accuracy. The experimental results show that able over 95.0% accuracy all traces.

After long-term polymer flooding, water channeling, and ineffective circulation occur in oil wells, which seriously affect flooding efficiency oilfield recovery. The weak gel system has the property of delaying cross-linking. enters deep formation, cross-linking reaction is carried out, can achieve purpose regulation flooding. In this paper, according to formation characteristics high temperature, permeability, large pores Y1 block (a Daqing Yushulin Oilfield), formulation was developed....

A multi-model organ segmentation method was proposed in this paper. The modified U-Net deep neural network model and simplified DenseNet used our to segment classify abdominal organs. Preliminary semantic results were corrected combined with medical prior knowldege the characteristics of video frame correlation, so that fine organs based on ultrasound images could be realized. TPR SIR reached 0.8172 0.7971, superior similar algorithms terms both visual effect evaluation indexes.