Abstract ：

Hydrothermal circulation and subsequent eruption of seawater at mid-ocean ridges and back-arc basins has great potential to modulate deep ocean biogeochemistry, acting as both a source and a sink for many trace elements and their isotopes. The influence of hydrothermal vents as a source of iron and manganese has been demonstrated in all ocean basins. However, the long-range impact of scavenging by hydrothermal particles has yet to be documented in detail. We use dissolved and particulate measurements of long-lived radiogenic (Th-230, Pa-231) and primordial (Th-232) radionuclides to investigate the nature and geographic scale of scavenging processes occurring within a hydrothermal plume in the Southeast Pacific Ocean sampled during the GEOTRACES GP16 section. Due to their radioactive disequilibrium with respect to production by their parent uranium isotopes, Th-230 and Pa-231 provide unique insights into the rates of scavenging. We find strong deficits in Th-230 and Pa-231 coincident with elevated particulate Mn and Fe(OH)(3), indicating that trace metal scavenging is widespread and likely the result of the strong affinity of trace metals for nanoparticulate metal surface sites. The chemical composition of the particulate material is closely linked to the scavenging intensity of Th-230 and Pa-231, expressed as distribution coefficients between solid and solution. A comparison of Th-230 and Pa-231 inventories with mantle derived He-3 as well as a mass balance of Th-230 and Pa-231 suggests continuous scavenging removal over the course of the entire 4000 km transect. Unlike the two radiogenic isotopes, Th-232 is enriched above what would be expected from assuming identical scavenging behavior to Th-230, indicating a hydrothermal source of colloidal, unreactive Th-232.

Keyword ：

Hydrothermal Thorium Scavenging East Pacific Rise Protactinium GEOTRACES

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Abstract ：

Unreasonable industrial land price in China not only lead to a waste of resources and inefficient land use, but also seriously restrict the industrial optimizing configuration and layout. Different land price strategy is an important way to control and guide industrial development. It is unclear whether the industrial diffusion scale of different cities in China is attributable to the land price variations. Based on the calculation of industrial land price variation (ILPV) and industrial diffusion scale index (IDSI), this paper investigates their spatial distribution and characteristics. There is obvious regional difference in the lowest standard of industrial land transfer price (LP) and ILPV. The industrial diffusion scale index of eight industries have a spatial positive correlation in different cities. By using the spatial data of 2015, this study examines the spatial effect on the industrial land price variations of industrial diffusion scale and its determinants by the Geographical Weighted Regression (GWR) model. The empirical results prove that the ILPV has a remarkably negative effect on the industrial diffusion scale in the four kinds of industries and has obvious spatial correlation on the industrial diffusion scale. Except for the trade freedom, other control variables have little influence on the industrial diffusion scale.

Keyword ：

Industrial land price variation Geographical weighted regression Spatial effect Industrial diffusion scale index

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The economic transformation and upgrading of resource-based cities is an overleaping development caused by technological progress and institutional change. Traditional models do not comprehensively evaluate the development level of resource-based cities. This study establishes a comprehensive index system from three aspects: economic adjustment, social progress and environmental improvement. An improved TOPSIS method and sequence weighting are applied to evaluate the level of transformation and upgrading of six resource-based cities in Shaanxi province from 2001 to 2015. The results indicate that six resource-based cities in Shaanxi Province have made an improvement in economic adjustment, social progress and environmental improvement. The economic adjustment effect is not obvious and there is a downward trend in some cities. The social development level of six resource-based cities increases significantly. The structural contradictions in the economy has not been fundamentally resolved. The effect of environmental improvement shows an evident increasing trend. All the six cities in environmental improvement achieve successful transformation.

Keyword ：

Economic transformation and upgrading Shaanxi province Resource-based city TOPSIS method

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Abstract ：

Emissions from heavy urban traffic have been the most abundant components of urban air pollution in China. Compared to the fast increasing consumption of automobile, the growth rate of urban traffic infrastructure investment (UTII) is relative low. It is a controversial issue for the policymaker whether promoting the UTII could make a positive impact on reducing air pollution or not. This study is designed to test the relations between the UTII and air quality, using the data of 83 cities from 2000 to 2012. Based on the empirical results from the fixed effect model and dynamic panel data model, increasing the UTII could generally mitigate the air pollution, but the long-run and short-run effects are significantly different. In the short run, the UTII effect on air quality is -0.02, since the urban traffic infrastructure construction might cause more detours and road blockages, which would enhance the fine-particle emissions of the low-speed traffic. In contrast, the UTII could widen the roads and make the traffic system more accessible in the long run, so the estimated positive effect is about 0.05. The robustness tests about different regions and scales of cities are conducted. Policy suggestions are further recommended to reduce air pollution. (C) 2017 Elsevier Ltd. All rights reserved.

Keyword ：

Long-run and short-run effects Traffic infrastructure investment Air pollution

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Abstract ：

In real decision making, decision makers tend to express their opinions with uncertainty when facing complicated decision problem and environment. This paper develops a novel consensus reaching process for multiple attribute group decision making (MAGDM) with hesitant fuzzy linguistic term sets (HFLTSs). Firstly, we define a new distance measure for two HFLTSs and propose a distance-based consensus measure for the MAGDM with HFLTSs. Then, based on this consensus measure, we develop a minimum adjustment distance consensus rule for the MAGDM with HFLTSs, which can minimize the adjustment distance between the original and adjusted opinions in the process of reaching consensus. Moreover, to obtain the collective opinion with maximum consensus, we develop a minimum distance aggregation model, which is to minimize the maximum of the distance between each decision maker's individual opinion and the collective opinion. Furthermore, based on the proposed consensus rule and aggregation model, we present a consensus reaching process for MAGDM with HFLTSs. Finally, we provide the convergence proof of the consensus reaching process, and a numerical example is used to demonstrate the validity of the consensus reaching process. (C) 2017 Elsevier B.V. All rights reserved.

Keyword ：

Consensus reaching process Hesitant fuzzy linguistic term sets Multiple attribute group decision making Minimum adjustment distance

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This paper examines the impact of hukou and college education on job placement and wage attainment for Chinese rural migrant workers in the cities. The analysis of the 2010 Chinese General Social Survey shows that when rural-born individuals gain both urban hukou and college education, they enjoy equal job-sector placement and they earn significantly higher wages than the college-educated locals. But in the absence of a rural-to-urban hukou transfer, migrants have fewer opportunities to go to college than local peers, and even college education does not gain a migrant an equal chance of working in the state sector or receiving equal earnings. A major contribution of this study is to suggest a nine-category analytic scheme, which takes into account how education, hukou and type of workplace affect one another in jointly influencing labour market inequality between rural migrants and urbanite workers.

Keyword ：

hukou career sequence education wage income job placement

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In recent years, joint replenishment and delivery problem (JRD) has been examined extensively in the context of replenishment and inventory control. However, as an extension of joint replenishment problem, the JRD is more complex and difficult to optimize with an exact algorithm. In this study, lower and upper bounds of JRD are obtained approximately but quickly using a novel bounding procedure. Then, a variable neighborhood search (VNS) with the bounding method is developed to solve the JRD. Computational examples show that the bounding procedure can effectively and efficiently determine satisfactory bounds, which are helpful for the proposed VNS. Results of randomly generated examples further indicate that the hybrid VNS performs better than the best known heuristic and metaheuristic for JRD in terms of accuracy.

Keyword ：

delivery Heuristics variable neighborhood search bound joint replenishment

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Abstract ：

Green production has become an important issue in PCD (Product Collaboration Design) for almost every enterprise, and will determine the sustainability of enterprises in the long term. The choice of design partner is a necessary condition in order to achieve green production. For the uncertain, fuzzy, and dynamic information such as unknown indices and weights, fuzzy semantics, and dynamic time factors in GPCD (Green Product Collaboration Design), a two-stage dynamic hybrid MADM (Multi-Attribute Decision Making) approach based on fuzzy DEMATEL (Decision-Making and Trial Evaluation Laboratory), fuzzy KMA (Karnik-Mendel Algorithm), and fuzzy VIKOR (VlseKriterjumska Optimizacija I Kompromisno Resenje) was proposed. In the first stage, fuzzy DEMATEL was used to determine the evaluation indices. Then, in the second stage, to accurately depict the dynamic information generated by the different phases of a product design, the dynamic evaluation method based on fuzzy theories was employed, and the weights of the indices were calculated by fuzzy KMA, then sorted by fuzzy VIKOR. Finally, a case study and a comparative analysis wre provided to illustrate the effectiveness of the proposed approach.

Keyword ：

design partner selection dynamic hybrid MADM fuzzy DEMATEL fuzzy KMA fuzzy VIKOR green product sustainability sustainable operation

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Abstract ：

Disaster resettlement, as a mitigation and preparedness measure, entails significant economic, physical, and social impacts, which continue to challenge understanding of recovery from major events, especially regarding the extent of the context and environmental efforts to rebuild livelihoods. Based on a case study of Qinling Mountains, China, this research investigates the effects of disaster resettlement from a livelihoods perspective. Methodologically, it proposes a framework that combines the pressure-state-response framework and the sustainable livelihoods approach, and it employs a structural equation model to examine how specific factors affect disaster resettlement. The results indicate that conflicts may occur during and after resettlement owing to the difference or disparity between the concerns of resettled peasants and those of the government. Consequently, the risks related to livelihoods need to be taken seriously. Effective risk communication is critical to bridge the gap between different stakeholders. The paper concludes with some practical and policy recommendations.

Keyword ：

livelihood perspective disaster resettlement pressure-state-response framework sustainable livelihoods approach

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Abstract ：

This study investigates the collective influences of cultural, hotel, and reviewer characteristics on online ratings in the hotel sector. Based on over 243,000 TripAdvisor reviews for hotels in 24 US cities, we empirically find a negative relationship between the reviewers' power distance and their online hotel ratings, thereby indicating that cultural factor plays a significant role in the customers' online rating behavior. The negative effect of power distance on online hotel ratings is weaker for chained hotels than for independent hotels. This negative effect is also weaker for reviewers with more travel experience than for those with less travel experience. The robustness check demonstrates that these findings are applicable for ratings on product features that involve staff interactions, such as service, value, rooms, and cleanliness. (c) 2017 Elsevier Ltd. All rights reserved.

Keyword ：

TripAdvisor Multidimensional rating Hotel Hotel chain Power distance Online rating Reviewer travel experience

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