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 ：

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

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Abstract ：

In this paper, we examine two urban projects in Kunming, Southwest China, one a massive scheme to build a new city center on rural land outside the city, and the other, an act of urban restructuring involving the rebuilding of an old Hui (Muslim) neighborhood in the old city center. We analyze the coalition of forces configured to undertake these large-scale projects; we underline the role of specially formed city-building organizations and the support provided by the state-owned institutions that dominate the city's political economy; and we draw attention to the caution with which the city government handled resistance to urban restructuring among Hui residents. We argue that urban growth projects in inland cities like Kunming are marked by certain features that distinguish them from similar projects in Eastern Chinese cities but maintain that nonetheless the drive for profit maximization at the expense of residents is unchanged.

Keyword ：

Urban restructuring growth coalitions Kunming China city-building organizations

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Abstract ：

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 ：

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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Abstract ：

In a closed-loop supply chain for electronic products, the manufacturer's priority is to enhance the residual value of the collected end-of-use product and decide whether to outsource this business to a retailer, a third-party service, or retain it exclusively. In this paper, we constructed three models to study the decision mechanism in a closed-loop supply chain, with different players selected to collect the used product. By comparing the three models, we characterized the conditions under which the manufacturer will benefit most, and we then aimed to determine the best choice for the manufacturer. Our findings show that, when the retailer and the third-party service provider provide equal performance in collecting the used product, the manufacturer will give priority to the third-party service provider if they choose to outsource this business. If the reverse flows managed by the retailer result in a higher payoff for the manufacturer, then the manufacturer will choose to outsource this business to the retailer who will also benefit.

Keyword ：

sustainability decision-making decision mechanism Stackelberg game closed-loop supply chain

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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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Abstract ：

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 ：

The majority of organic semiconductors have a low relative dielectric constant (epsilon(r) < 6), which is an important limitation for organic solar cells (OSCs). A high dielectric constant would reduce the exciton binding energy, reduce charge carrier recombination losses, and thereby enhance the overall device performance of OSCs. However, the development of organic/polymeric semiconductors with higher relative dielectric constants (epsilon(r) > 6) has attracted a very limited attention. Moreover, high performance OSCs based on high dielectric constant photovoltaic materials are still in their infancy. Herein, we report an oligoethylene oxide side chain-containing non-fullerene acceptor (ITIC-OE) with a high relative dielectric constant of e epsilon(r) approximate to 9.4, which is two times larger than that of its alkyl chain-containing counterpart ITIC. Encouragingly, the OSCs based on ITIC-OE show a high power conversion efficiency of 8.5%, which is the highest value for OSCs that employ high dielectric constant materials. Nevertheless, this value is lower than those of ITIC-based control devices. The less phase-separated morphology in blend films due to the reduced crystallinity of ITIC-OE and the too good miscibility between PBDB-T and ITIC-OE are responsible for the lower device performance. This work suggests additional prerequisites to make high dielectric constants play a significant role in OSCs.

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Abstract ：

Two novel wide-bandgap copolymers, PBDT-TDZ and PBDTS-TDZ, are developed based on 1,3,4-thiadiazole (TDZ) and benzo[1,2-b:4,5-b']dithiophene (BDT) building blocks. These copolymers exhibit wide bandgaps over 2.07 eV and low-lying highest occupied molecular orbital (HOMO) levels below -5.35 eV, which match well with the typical low-bandgap acceptor of ITIC, resulting in a good complementary absorption from 300 to 900 nm and a low HOMO level offset (<= 0.13 eV). Compared to PBDT-TDZ, PBDTS-TDZ with alkylthio side chains exhibits the stronger optical absorption, lower-lying HOMO level, and higher crystallinity. By using a single green solvent of o-xylene, PBDTS-TDZ:ITIC devices exhibit a large open-circuit voltage (V-oc) up to 1.10 eV and an extremely low energy loss (E-loss) of 0.48 eV. At the same time, the desirable high short-circuit current density (J(sc)) of 17.78 mA cm(-2) and fill factor of 65.4% are also obtained, giving rise to a high power conversion efficiency (PCE) of 12.80% without any additive and post-treatment. When adopting a homotandem device architecture, the PCE is further improved to 13.35% (certified as 13.19%) with a much larger V-oc of 2.13 V, which is the best value for any type of homotandem organic solar cells reported so far.

Keyword ：

1,3,4-thiadiazole homotandem solar cells nonfullerene organic solar cells wide-bandgap copolymers green solvent

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Abstract ：

The copper-catalyzed cyclization of activated alkenes with cyclobutanone O-aryl oximes under redox-neutral conditions has been reported. This facile protocol provided an efficient approach to a variety of cyanoalkylated oxindoles and dihydroquinolin-2(1H)-ones with a broad substrate scope and excellent functional group tolerance. In this reaction, sequential C-C bond cleavage, radical addition, and cyclization processes were involved, wherein multiple bonds were constructed in a one-pot reaction. Mechanistic studies suggest that the reaction probably proceeded via a radical pathway.

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