In this study, the corrosion behavior of X52 pipeline steel affected by H2O content in supercritical CO2 streams containing O2, H2S, SO2 and NO2 impurities was investigated weight loss test surface characterization. The differences impure different contents were analyzed. influence variation on mechanism complex impurity-containing discussed. results show that limit is 100 ppmv 200 at 10 MPa 50 °C. their interactions significantly promote formation corrosive aqueous phase, thereby...

Improving agricultural water use efficiency (WUE) and reducing the proportion of consumption are great significance for coping with crisis in world, particularly northwest China. However, considering lack WUE indicators selection an evaluation system construction Xinjiang, implementation strictest resources management this province has been seriously restricted. In order to evaluate utilization situation 14 administrative regions a synthetical model is proposed combining analytic hierarchy...

The integration and optimization of protected areas is an important part the construction a system centered around national parks. How to best integrate optimize most urgent problem in reform. This paper analyzes spatial overlap continuity China on scale proposes collection candidate for results show that ➀ 52.9% overlap, with nature reserves, forest parks scenic showing maximum number overlaps five. ➁ There are 1145 groups contiguous form continuous boundary areas, accounting 58.9% total...

Compared with hydraulic fracturing, CO2 waterless fracturing can an alternative technology for the unconventional resources, such as tight oil resources and gas resources. It is environment-friendly technology. Liquid fluid be more easily obtained, it safe non-explosive. Under formation temperature, has ultra-low interfacial tension in supercritical state, so strong penetration ability, which penetrate into matrix of reservoir communicate deeply. At same time, reduce viscosity crude oil....

In this article, we propose a novel scheme for diagnosing intermittent faults cloud systems. We have investigated the characteristic of high-level symptomatic behavior on top system and identified that (1) arrival counts symptoms go up with number fault injections at different speeds, which may help us to differentiate one model from another; (2) nested level fatal traps is found be an indicative duration, helpful diagnosis; (3) triggered by certain faulty units explored, providing useful...

Background & Aims: Natural selection assumes that there is an expected fitness advantage (or aim) for any of gene mutations or phenotypic characteristics.However, the selected mutation/phenotypic characteristic might vary as it spreads throughout a population with changing living environments over both evolutionary and ecological scales.This may result in "paradox stationary landscape" which therefore not exist.Based on dynamic state but landscape, we propose natural exhibit path-dependent...

Abstract In large‐scale block adjustment of high‐resolution satellite imagery (HRSI) without ground control points (GCPs), the selection virtual (VCPs) is an important factor in determining accuracy. The traditional VCP generation method based on a regular grid and uses initial rational polynomial coefficient (RPC) files but considering topographic factors. To further improve accuracy, this paper proposes approach for optimal VCPs with planar constraints, which ensures that are mostly areas...

Various approaches have been used in crack preparations and each of the has advantages disadvantages. Although routing method widely seems to be best approach among approaches, it is not a complete solution for preparation. This paper compares evaluates pneumatic cleaning device (CCD) developed by Robotics Intelligent Construction Automation group at Georgia Tech, over existing devices. Surveys were conducted discover factors that affect performance crack/joint preparation work. Then, data...

The objective of this study is to develop a back-propagation neural network (BPNN) assess the health status estuarine ecosystems.The BPNN objectively reflected ecosystem due weight and bias values obtained by training, owing its adaptive learning, self-organization fault tolerance.Correlation analysis used avoid double counting input variables.Particularly, 11 indices were as assessment parameters establish set three-layer BPNNs.The output one layer index.After training testing BPNNs,...

Recently, a significant number of Connected Vehicle (CV) applications have emerged to offer solutions some the problems caused by increasing traffic demands. To better understand influence different CV on in relatively unified manner, novel measure effectiveness (MOE) called speed variation-based entropy (SVE) is proposed. An analytical study was carried out types relating SVE with other conventional MOEs safety, mobility, and environmental sustainability. Four applications–High Speed...

This paper addresses an order selection decision model in a make-to-order operation environment based on the short-term capacity-planning problem. Make-to-stock and are two generic modes commonly used manufacturing world. The enterprise makes production systems to produce product only after it is ordered. must decide which orders can be accepted get optimal profit meet due time. environment. mathematical proposed select set of customer maximize operational such that all selected fulfilled by...

Retracted.

As semiconductor technology scales into the nano regime, hardware faults have been threats against computational devices. Cloud systems are incorporating more and computing density energy themselves; thus, fundamental research on topics such as dependability validation is needed, in order to verify robustness of clouds for sensor networks. However, evaluation studies often carried out beyond isolated physical systems, processors, sensors, single boards with or without operating system hosts....

A semi-automated general arrangement technique of naval ship is discussed, it approached by a series two essentially two-dimensional problems: the allocation spaces to Zone-decks (one deck within one vertical zone), after that, implement detailed each Zone-deck. In this context, fuzzy modeling introduced for evaluating environmental loadings (noise, vibration and motion) Naval Equipment Standards, then these measures are translated utility values which express satisfaction location group...

In order to analyze the influence of road factors on driving reliability in rainfall environment, method Principal Component Analysis is used obtain predominant indexes based analyzing relevant parameters that consist friction coefficient, roughness, condition, water-film thickness, and alignment. Results case studies show can effectually transform multitudinous with linear correlation set traffic safety into representative uncorrelated index, which provides a new means for quantitative...

In the context of construction a new type power system, high proportion clean energy integration poses serious challenge to reliable operation system. This article studies adequacy Yunnan grid from perspective market mechanisms. Firstly, basic situation in Province was analyzed, and key issues particularities designing system mechanism were proposed based on actual Yunnan. Propose framework design connection with participation multiple entities, sort out transaction process entities. The...

This article has been retracted by the publisher.

With the development of wall innovation, appearance regeneration concrete hollow block has an important operation significance for building energy saving and high efficiency recycling waste concrete. The paper introduces a new green material—regeneration analyzes feasibility its application from point macroscopic technical economy. forecasts direct indirect economic benefits after in order to promote extension block.

Retracted.

This paper mainly studied the basic principles and methods of application fuzzy mathematics to transaction structure scheme design evaluation BT(build transfer) mode for university campus construction, also set up multi-level rating index decided weight coefficient information collection system. It illustrated feasibility this method by empirical study offered strong theoretical foundation project decision.