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The paper aims to study the challenges and solutions of city logistics in the new retail era. The new retail, which is characterized by omni-channel, fragmented orders and decentralized 2C distribution, is becoming the mainstream of the retail industry worldwide. In order to achieve a comprehensive breakthrough in new retail, the change of order fulfillment mode is the most noteworthy issue. The aim of this paper is to design a city logistics operation model for new retail and verify its feasibility and efficiency.

A physical internet (PI) enabled two-tier city logistics solution is proposed by redefining the key facilities in city logistics with the PI concept. A “Container-as-a-Warehouse” operation mode is designed to provide a more flexible store and transfer solution. A mathematical model of the proposed solution is established. An adaptive large neighborhood search (ALNS) is designed based upon an iterative procedure, which ensures consistent and optimal results.

To quantitatively assess the feasibility of the proposed solution, a computational experiment is designed to compare the performance of the proposed model against the conventional two-tier city logistics operation. The effects of geographical location pattern, utilization of PI-hub as well as the fluctuation of customer orders are analyzed. The results show that the PI-enabled city logistics is more advantageous than the conventional solution.

This study does not consider the impact of new technologies in city logistics; for example, the replenishment problem of unmanned vending machines and the charging problem of electric vehicles.

The proposed PI-enabled solution and analysis results in this paper have positive guiding significance for future practical application.

Based on the concept of PI, this paper proposes an innovative and practical operation model to solve the city logistics challenges.

Emerging research on education reform in Shanghai for the last decade or so has either focused on broad contexts and trends of the second-cycle curriculum reform or the professional development in response to the reform or a few detailed cases of teaching improvement to meet the reform demand. Little attention has been paid to how schools as institutions have been made to respond to and enact the reform. Through three detailed school cases, the purpose of this paper is to understand their distinctive responses to reform in terms of how they interpreted, enacted and sustained their reform efforts and how more importantly lesson-case study and multi-tiered research projects has become a reinvigorated form of Chinese lesson study and teaching research to significantly mediate the school’s curriculum reform efforts. Features of sustainable development behind these cases are conceptualized by Lave and Wenger’s notion of transparency of the mediating technology of a community of practice.

Drawing on master’s thesis reports of school leaders (2010-2016), school research publications and lesson cases as secondary data sources, an instrumental multi-case research design was adopted to build detailed case narratives and tease out cross-case comparisons.

Building on unique strengths and legacies to solve school problems, the three secondary schools responded to, enacted and sustained the reform in unique ways: case 1, a municipal key school, has focused on “three translations (of curriculum)” involving all teaching research groups (TRGs) in specifying broad curriculum standards and turning them into concrete, actionable designs and student tasks which are tested and refined through iterative cycles of lesson-case study, with the decision making for each translation informed by research projects studying problems arising. Case 2, a district key school, has capitalized on its strong TRGs and used research projects and lesson-case study to unite teaching, research and PD into a whole; and case 3, a regular neighborhood school, has aimed to build a structured PD system to tackle teacher stagnation by stressing the reflection components of each cycle of lesson-case study, challenging teachers to learn in the district-level curriculum integration experiment, and nudging them into their own research projects with well-staged support. In all the three cases, research projects have been networked connecting municipal, district, school and teachers in building a research climate. The lesson-case study has turned designs into refined actions to ensure quality of curriculum implementation and teacher growth.

This study yields insights into the inner workings of Shanghai’s recent curriculum reform. With strategic injection of research into the familiar institutional structures and organic cultural forms of collegiality, school innovations can be built on familiarity to create a sense of continuity, coherence and institutional identity so that teachers learn from doing with least disruption. The slow and steady work of sustaining innovations and reform goes beyond simple notions of scaling up and relies on building internal drive and institutional and teacher capacity for deep learning in responding to reform.

In this study, a novel glutathione (GSH) surface molecular imprinting polymer (SMIP) was successfully prepared by using macroporous adsorption resins (MAR) as substrate, which could separate and purify GSH efficiently.

SMIP was synthesized by chloromethylated modified MAR (LX1180-Cl) as the substrate, N, N’-methylenebisacrylamide (NMBA) as a crosslinker, GSH as a template, acrylamide (AM) and N-vinylpyrrolidone (NVP) as functional monomers. The morphology and structure of the polymer were characterized by scanning electron microscope and Fourier transforms infrared spectroscopy.

The maximum adsorption capacity toward GSH was 39.0 mg/g and the separation decree had relation to L-cysteine (L-cys) was 4.2. The optimal operation conditions were studied in detail and the got as follows: the molar ratios of NMBA, AM, GSH and NVP, were 7.0, 0.8 and 0.5. The optimal time and temperature were 14 h and 40°C, respectively. The Langmuir and pseudo-first-order model were fitting these adsorption characteristics well.

GSH has a diversity of medicinal and bioactive functions, so the purpose of this study representing a method in separate and purify technology of GSH, which provided a way for the development of medicine.

This contribution provided a novel way to separate GSH from L-cys. Under the optimal conditions, the maximum adsorption capacity toward GSH was 39.0 mg/g and the separation decree had relation to L-cys was 4.2.