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Explore the development trend of chemically-improved soil in railway engineering.

In this paper, the technical standards home and abroad were analyzed. Laboratory test, field test and monitoring were carried out.

The performance design system of the chemically-improved soil should be established.

On the basis of the performance design, the test methods and standards for various properties of chemically-improved soil should be established to evaluate the improvement effect and control the engineering quality.

This study purposes to study the influence of artificial freezing on the liquefaction characteristics of Nanjing sand, as well as its mechanism.

was studied through dynamic triaxial tests by means of the GDS dynamic triaxial system on Nanjing sand extensively discovered in the middle and lower reaches of the Yangtze River under seismic load and metro train vibration load, respectively, and potential hazards of the two loads to the freezing construction of Nanjing sand were also identified in the tests.

The results show that under both seismic load and metro train vibration load, freeze-thaw cycles will significantly reduce the stiffness and liquefaction resistance of Nanjing sand, especially in the first freeze-thaw cycle; the more freeze-thaw cycles, the worse structural behaviors of silty-fine sand, and the easier to liquefy; freeze-thaw cycles will increase the sensitivity of Nanjing sand's dynamic pore pressure to dynamic load response; the lower the freezing temperature and the effective confining pressure, the worse the liquefaction resistance of Nanjing sand after freeze-thaw cycles; compared to the metro train vibration load, the seismic load in Nanjing is potentially less dangerous to freezing construction of Nanjing sand.

The research results are helpful to the construction of the artificial ground freezing of the subway crossing passage in the lower reaches of the Yangtze River and to ensure the construction safety of the subway tunnel and its crossing passage.

This method will become a new development trend in subgrade structure design for high speed railways.

This paper summarizes the structural types and design methods of subgrade bed for high speed railways in China, Japan, France, Germany, the United States and other countries based on the study and analysis of existing literature and combined with the research results and practices of high speed railway subgrade engineering at home and abroad.

It is found that in foreign countries, the layered reinforced structure is generally adopted for the subgrade bed of high speed railways, and the unified double-layer or multi-layer structure is adopted for the surface layer of subgrade bed, while the simple structure is adopted in China; in foreign countries, different inspection parameters are adopted to evaluate the compaction state of fillers according to their respective understanding and practice, while in China, compaction coefficient, subsoil coefficient and dynamic deformation modulus are adopted for such evaluation; in foreign countries, the subgrade top deformation control method, the subgrade bottom deformation control method, the subsurface fill strength control method are mainly adopted in subgrade bed structure design of high speed railways, while in China, dynamic deformation control of subgrade surface and dynamic strain control of subgrade bed bottom layer is adopted in the design. However, the cumulative deformation of subgrade caused by train cyclic vibration load is not considered in the existing design methods.

This paper introduces a new subgrade structure design method based on whole-process dynamics analysis that meets subgrade functional requirements and is established on the basis of the existing research at home and abroad on prediction methods for cumulative deformation of subgrade soil.

The purpose of this paper is to examine the impacts of farmland renting-in on planted grain acreage.

A survey data of five counties were analyzed with the two-stage ordinary least squares model.

Households renting-in land trended to plant more maize, and the more land was rented by a household the more maize was planted, while wheat acreage showed non-response to farmland renting-in.

Overall, the analysis suggests that policy makers should be prepared for different changing trends of grain crop acreage across the nation as farmland transfer continues. Future research should pay attention to the effect of farmland transfer on agricultural productivity and rural household income growth.

As the Chinese Government is promoting larger-scale and more mechanized farms as a way of protecting grain security, it is important to understand whether farmland renting-in will reduce planted grain acreage. This study provides empirical evidence showing the answer to that question may differ across different regions and depend on the particular grain crop in question.

It is of great significance to study the influence of subgrade filling on permafrost temperature field in permafrost area for the smooth construction and safe operation of railway.

The paper builds up the model for the hydrothermal coupling calculation of permafrost using finite element software COMSOL to study how permafrost temperature field changes in the short term after subgrade filling, on which basis it proposes the method of calculation for the concave distortion of freezing front in the subgrade-covered area.

The results show that the freezing front below the subgrade center sinks due to the thermal effect of subgrade filling, which will trigger hydrothermal erosion in case of sufficient moisture inflows, leading to the thawing settlement or the cracking of the subgrade, etc. The heat output of soil will be hindered the most in case of July filling, in which case the sinking and the distortion of the freezing front is found to be the most severe, which the recovery of the permafrost temperature field, the slowest, constituting the most unfavorable working condition. The concave distortion of the freezing front in the subgrade area increases with the increase in temperature difference between the filler and ground surface, the subgrade height, the subgrade width and the volumetric thermal capacity of filler, while decreases with the increase of the thermal conductivity of filler. Therefore, the filler chose for engineering project shall be of small volumetric thermal capacity, low initial temperature and high thermal conductivity whenever possible.

The concave distortion of the freezing front under different working conditions at different times after filling can be calculated using the method proposed.

Between 2006 and 2011, Nicaragua shipped an average of US$9.4 million per year of smallholder-produced fresh taro (Colocasia esculenta) to the USA; however, by 2016, the US market for Nicaraguan taro had effectively collapsed. The purpose of this paper is to analyze the short-lived taro boom from the perspective of complex adaptive systems, showing how shocks, interactions between value chain actors, and lack of adaptive capacity among chain actors together contributed to the collapse of the chain.

Primary data were collected from businesses and smallholders in 2010 and 2016 to understand the actors involved, their business relations, and the benefits and setbacks they experienced along the way.

The results show the capacity of better-off smallholders to engage in a demanding market, but also the struggles faced by more vulnerable smallholders to build new production systems and respond to internal and external shocks. Local businesses were generally unprepared for the uncertainties inherent in fresh horticultural trade or for engagement with distant buyers.

Existing guides and tools for designing value chain interventions will benefit from greater attention to the circumstances of local actors and the challenges of building productive inter-business relations under higher levels of risk and uncertainty.

This case serves as a wake-up call for practitioners, donors, researchers, and the private sector on how to identify market opportunities and the design of more robust strategies to respond to them.

This paper provides an analytical account detailing the historical linkages between Chinese on both sides of the Sino-Hong Kong border from 1841 onwards and examining important incidents of collective actions in the colony and Canton.

Using annual reports published by the colonial administration in Hong Kong, especially those focusing on years that witnessed major incidents of anti-colonial agitations, this paper analyzes how British policymakers were confronted by collective actions mounted by Chinese in Canton and Hong Kong. Building on the works of prominent historians and utilizing the theoretical frameworks of analysts such as Charles Tilly (1978), the author examines if a Cantonese regional solidarity served as the foundation for popular movements, which in turn consolidated a rising Chinese nationalism when Canton and Hong Kong were the focal points of mass actions against imperialism.

Hong Kong Chinese workers were vanguards of the modern Chinese revolutions that transformed not just their homeland, but their lives, allegiances, and aspirations as Chinese in a domain under foreign jurisdiction on Chinese soil, as their actions were emulated by their compatriots outside of South China, thus starting a chain reaction that culminated in the establishment of the Nanjing regime.

This paper reveals that popular movements of Hong Kong Chinese possessed national and international importance, especially when they were supported by their Cantonese compatriots and the two leading Chinese political parties, the Kuomintang (KMT) and the Chinese Communist Party (CCP).

The purpose of this study is to examine the trend toward purchasing locally grown food and evaluate if tourists visiting Hawai'i are willing to pay more for locally produced foods that are more ecologically sustainable.

A research questionnaire was developed in order to investigate the attitudes and behaviors of tourists from the continental United States visiting Hawai'i in purchasing locally grown food in Hawai'i. The final sample includes 454 valid survey responses collected via Momentive, a market research services company.

According to the findings of this study, there are economic prospects to expand the use of locally cultivated food into the tourists' experience, as well as a willingness for tourists to support these activities financially. The Contingent Valuation study revealed that tourists from the continental United States were ready to pay a higher price to purchase food that is locally grown, signifying that tourists to Hawai'i are willing to aid the local agriculture business by increasing their restaurant/hotel meal bill, which will help Hawai'i become a more sustainable tourist destination.

While tourists from the United States mainland, which is the “an islands” top tourist market, have agreed with paying extra or an additional fee for locally grown food products, this study might not accurately represent the attitudes and behaviors of international tourists visiting Hawai'i. Future research should focus on the international tourist markets which may have different social norms or cultural differences thus could provide a broader spectrum of the current study's findings.

The results of this study provided quantitative evidence that tourists from the United States are interested in purchasing locally grown food items in Hawaii in addition to their willingness to pay an additional fee for these locally grown food products at a restaurant or a hotel dining room, thus addressing a gap in the tourism research.

This paper aims to present a critical appraisal of Ghassan Kanafani’s short story “The Child Goes to the Camp” using the Appraisal Theory proposed by Martin and Rose (2007) in an attempt to investigate the predicament of the Palestinians who were forced to flee their country and live in refugee camps as well as the various effects refugee life had on them.

Using the Appraisal Theory, and with a special focus on the categories of Attitude and Graduation, the paper aims to shed light on the plight of refugees through revealing the narrator’s suffering in a refugee camp where the most important virtue becomes remaining alive.

Analysing the story using the Appraisal Theory reveals the impact refugee life has left on the narrator and his family. This story serves as a warning for the world of the suffering refugees have to endure when they are forced to flee their war-torn countries.

Although Kanafani’ resistance literature has been studied extensively, his short stories have not received much scholarly attention. In addition, his works have not been subject to linguistic analysis. This study presents an appraisal analysis of Kanafani’s “The Child Goes to the Camp” in an attempt to investigate how the author’s linguistic choices are key to highlighting the suffering of the Palestinians, especially children, in refugee camps.

Western economics came into being with the rise of the capitalist market economy. It had a nature of duality beginning from its birth: the justificativeness of providing theoretical pillars for the capitalist market economy system and the scientificity of revealing the internal relations and operating rules of the capitalist market economy. The paper aims to discuss this issue.

However, after the 1830s, this justificativeness gradually evolved into vulgarity. Since the 1930s, modern western mainstream economics has mainly explored the general market economy on the assumption that the capitalist system remains unchanged, and many outcomes of such research are positive and beneficial.

Political economy of socialism with Chinese characteristics, at the present stage, is mainly a Chinese socialist market economics. It is guided by the Marxist political economy and rooted in the great practice of China’s reform and opening up and socialist modernization.

According to political complexion, western economic theories can be divided into political economic theory, mainstream economic theory and basic economic theory. By subjecting these theories to what we term “elimination,” “transformation” and “transplantation” surgeries, respectively, we can absorb and accommodate their beneficial elements in building a political economy of socialism with Chinese characteristics, which in turn is conducive to the development and prosperity of such an economy.