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This paper aims to describe the corrosion behavior and possibility of inhibition by corrosion inhibitor SA1-3 in acidizing solution (5 per cent hydrochloric acid [HCl] solution). The study aims to explain the mechanism of corrosion and inhibition of N80 steel in 5 per cent HCl solution to provide theoretical basis for expanding the range of application of N80 steel in acidification process.

This paper opted for a laboratory study using simulation of acidizing solution to do the experiments. The results of experiments including weight-loss method, electrochemical method and surface analysis were used to explain the mechanism of corrosion and inhibition so as to predict the dissolution progress of N80 steel in 5 per cent HCl solution with and without inhibitor SA1-3.

This paper provides theoretical insights about how to inhibit the corrosion behavior of N80 steel in 5 per cent HCl solution. It suggests that the corrosion inhibitor which can form a protective film on the steel surface should be used to expand the application of N80 steel in acidizing solution. The inhibitor SA1-3 is a kind of cathodic corrosion-controlling inhibitor which mainly inhibits cathode corrosion; it cannot change the corrosion mechanism of N80 steel.

This paper provides a theoretical basis for the corrosion behavior and inhibition mechanism of N80 steel in acidizing solution.

This paper aims to analyze the corrosion and corrosion inhibition of N80 in 10 per cent HCl + 8 per cent fluoroboric acid (HBF₄) solution for acidizing operation.

The corrosion rate, kinetic parameters (Ea, A) and thermodynamic parameters (ΔH, ΔS) of N80 steel in fresh acid and spent acid, 10 per cent HCl + 8 per cent HBF₄, 10 per cent HCl and 8 per cent HBF₄ solutions were calculated through immersion tests. The corrosion and inhibition properties were studied through X-ray diffraction and electrochemical measurements. The corrosion morphology of the corrosion product was examined by scanning electron microscopy (SEM).

The results demonstrated that the spent acid was the main cause of acidification corrosion, and the HBF₄ would cause serious corrosion to N80 steel. The results showed that the N80 steel was more seriously corroded in the spent acid than in fresh acid, and the hydrolysis of HBF₄ accelerates the dissolution process of N80 steel anode to control the corrosion reaction. The results showed that the acidification will definitely cause serious corrosion to the oil tube; therefore, necessary anti-corrosion measures must be taken in the acidification process.

The results showed that acidizing the formation with 10 per cent HCl + 8 per cent HBF₄ will definitely cause serious corrosion to the oil tube, especially when the spent acid flows back. Therefore, necessary anti-corrosion measures must be taken in the acidification process, especially in the spent acid flowback stage.

In modern integrated modular avionics (IMA), it plays an important role to guarantee safety and reliability of the system. The safety and reliability of communication scheduling plays a crucial role in this IMA platforms-based network system. To verify the safety and reliability of the communication scheduling in this network, sufficient and typical test data must be generated to input into the network, obtain and evaluate the corresponding output.

To generate communication scheduling data, this paper presents an iterative communication scheduling data generation algorithm for a configured network of IMA platforms. First, the algorithm generates all possible communication schedules for the first timestamp. Then, constraint is introduced to decrease the quantity of communication schedules to improve the efficiency. The communication schedules are gradually extended to the second timestamp until the final timestamp, i.e. length of communication scheduling sequence.

To verify the efficiency and feasibility of the algorithm, a model is built based on the architecture analysis and design language (AADL) by mapping the correlation time of generated communication scheduling data into task properties. Schedulability is analyzed by loading this model into AADL Inspector. The simulation result illustrates that the proposed algorithm is efficient and feasible.

The proposed method can provide data support for communication scheduling test for the network of IMA platforms.

A constraint-based iterative communication scheduling data generation algorithm is proposed for the network of IMA platforms automatically.

Conceptual physical education (CPE) classes have been widely offered to promote a healthy lifestyle in higher education settings. The purpose of this paper is to examine the effects of a CPE course on health-related fitness (HRF) levels among college freshmen.

A pre- and post-test research design was used. In total, 50 freshmen in a US university were enrolled in a 13-week CPE course. Their HRF levels were assessed by the Fitnessgram at the beginning and the end of the course.

Students significantly enhanced their aerobic capacity, upper-body muscle strength and endurance, abdominal muscle strength and endurance, and decreased body fat percentage. No significant improvement in flexibility was found among the total sample. However, non-kinesiology students significantly enhanced their flexibility while the opposite trend was found among kinesiology students. Female students reduced more body fat percentage, while male students increased their aerobic capacity more rapidly than their female counterparts.

The CPE course could yield significant improvement in HRF among freshmen, regardless of sex or major. Universities may consider offering CPE courses for all students and mandate such courses as a degree requirement.

This empirical study investigated HRF level changes that occurred after a CPE course intervention among college freshmen. Sex and major difference in HRF changes were revealed. The interventions included in the CPE course could help improve freshmen's HRF levels in future intervention programs in a similar setting.

The paper reports an investigation into the use of aqueous extracts of rice bran as a green inhibitor for corrosion of carbon steel in hydrochloric acid (HCl) solution.

Extracts from the rice bran were used as the main component of an environmentally friendly corrosion inhibitor for use in HCl pickling processes. Inhibition behavior on carbon steel in HCl was investigated by means of mass‐loss tests, polarization curves, electrochemical impedance spectroscopy and atomic force microscopy.

The results show that the extract exhibited good inhibition performance in 1 M HCl. The inhibition efficiency increased with increase in the concentration of the inhibitor and was only moderately affected by temperature variations in the range 303‐363 K. The inhibitive action was due to adsorption on the A3 steel and the adsorption process was consistent with the Langmuir isotherm. The free energy of adsorption (ΔG_ads.) was −4.192 kJ/mol. The negative value of ΔG_ads. indicated spontaneous adsorption of the inhibitor occurred on the surface of A3 steel.

Rice bran extract is an effective inhibitor and can be used to protect carbon steel from corrosion in HCl solution.

The rice bran extracts are an effective green inhibitor and can be widely used in the pickling of metals.

The study conceptualizes how firms’ strategic motives interact with the heterogeneity of host country institutional environments in determining the subsidiary ownership. The author hypothesizes and tests two interaction effects. The study found that firms with market-seeking motives are more affected by the heterogeneity of host country institutional environments, while firms with resource-seeking motives are less affected by the heterogeneity. The empirical findings are based on a sample of overseas subsidiaries reported in the annual reports of listed firms in China.

In this study, an empirical investigation was conducted using a sample of subsidiaries of listed firms in China. The data were compiled from 2012 annual reports of listed firms in China. The sample consists of 2,270 subsidiaries of these firms.

The study conceptualizes that firms with market-seeking motives and resource-seeking motives are influenced differently by the heterogeneity of host country institutional environments in determining their subsidiary ownership. We hypothesize two interaction effects. Firms with market-seeking motives are more subject to the heterogeneity of host country institutional environments in determining their FDI ownership level. In contrast, firms with resource-seeking motives are less subject to this heterogeneity. The findings largely supported the study’s hypotheses.

This study fills an important gap in the literature by incorporating the interaction between strategic motives and host country environments in the analysis of subsidiary ownership. The findings of the study suggest that firms with a market-seeking motive are more particular about the host country institutional environments. They will acquire a high level of ownership in host countries with attractive institutional environments. In contrast, firms with resource-seeking motive are less concerned with the host country institutional environments. Their decision on subsidiary ownership is less affected by the variance in host country institutional environments. This study adds to the stream of studies that have examined outward investments of firms from emerging economies, particularly the outward expansion of Chinese firms with different strategic motives.

The purpose of this paper is to develop an automatic disassembly navigation approach for human interactions in the virtual environment to achieve accurate and effective virtual assembly path planning (VAPP).

First, to avoid the error-prone human interactions, a constraint-based disassembly method is presented. Second, to automatically provide the next operable part(s), a disassembly navigation mechanism is adopted. Finally, the accurate assembly path planning can be obtained effectively and automatically by inversing the ordered accurate disassembly paths, which are obtained interactively in the virtual environment aided with the disassembly navigation matrix.

The applications present that our approach can effectively avoid the error-prone interactive results and generate accurate and effective VAPP.

There are several works that could be conducted to make our approach more general in the future: to further study the basic disassembly direction deducing rules to make the process of determining disassembly direction totally automatic, to consider the hierarchy of the parts in virtual reality system and to consider the space for assembly/disassembly tools or operators.

The approach has the following characteristics: a new approach to avoid the error-prone human interactions for accurate assembly path planning obtaining, a new constraint deducing method for determining the disassembly semantics automatically or semi-automatically is put forward and a new method for automatically identifying operable parts in VAPP is set forward.

In the context of circular economy, tourism resources development and integrated marketing need to interact with multiple businesses, data processing with big data technology, and in the information age, the best means of integrated marketing is to integrate business through an information platform. The research purpose of this article is to improve the intelligence of the tourism platform by constructing an OR model, integrate information and improve the data processing effect in an all-round way through data mining.

This study builds the business interaction in the form of OR (operations research model) model and combines this model with the e-commerce platform to build an online travel consumption model based on the user's online operation mode.

With the development of the times and the upgrading of industries, tourism and other industries have provided new tourism resources and tourism methods for human beings by virtue of the beautiful environment, special experiences and colorful stories and related industries have been related to the tourism industry based on natural resources, customs and folklore and agricultural experiences. By identifying important nodes with high connectivity in the social network, the weighted centrality algorithm can mine the importance of interest tags.

In addition, this research builds a test platform for model performance analysis and integrates various factors. The results show that the model constructed in this study can further promote the development of tourism, improve the efficiency of tourism resources, provide marketing effects and meet the circular economy theory.

Recognizing the significant impact of guanxi (the Chinese network of reciprocal business relations) and its influence on everyday dealings in China is important for Western firms. Researchers argue that social capital has limits and is not a commodity that has a place in China aspiring to be a global business hub. Accordingly, the purpose of this paper is to deal with the question of whether guanxi still matters in the Chinese business arena, and if so, to what extent.

To illustrate the evolutional direction of the Chinese institutional system, the authors compare it to a similar system that went through the evolutionary cycle from a social to a rational institutional base of exchange and discuss what one can learn from the institutional evolution process of the global diamond industry and its implications for the current evolution of Chinese institutions. The authors compare two similar cultures/religions, Judaism and Confucianism.

This study found parallels between the evolution of the Israeli diamond industry, dominated by Orthodox Jews, from a social exchange mechanism to a transactional mechanism and the present ongoing rationalization of the Chinese economy, dominated by the Confucianism culture from a social to a transactional business mechanism.

Despite the vast efforts of researchers in the area of guanxi, there is very little published knowledge about its limitations and its usefulness in today's changing business environment. This paper contributes to the existing literature on the future aspects of guanxi from a unique perspective – the evolution of the Israeli diamond industry.

The aim of the paper is to elaborate a framework of project business as a distinct mode of internationalization. The uniqueness and complexity of project business as a core mode are portrayed by comparing it with other internationalization modes. It is agreed that a single project sale is a discrete form of direct involvement in a foreign market. However, this provides opportunities for network interactions that can facilitate further project business openings in a foreign market and on a global level.

Using the abductive method, the paper constructs a comparative framework of project business and other forms of internationalization. It illustrates the discussion with a longitudinal case study of a company that uses project business as its strategic choice for its internationalization.

The paper finds that, using project business as its core internationalization mode, the company has expanded its global business as well as entering and succeeding in foreign business networks. It proposes that the network and relationship‐based project business approach is viable as a strategic alternative for internationalization on its own or in combination with other modes.

The study provides a framework for positioning project business as a separate internationalization mode. It provides a comparative framework for internationalization modes.

This study provides managers with an understanding of project business as a distinct and profitable mode of internationalization. It illuminates the network and relationship‐building aspects of project business.

According to the research, this is the first study that proposes project business as a distinct mode of internationalization. Much previous research has either not mentioned project business or subsumed it as an unimportant part of exports. The framework developed in this study should spur new research on the issue.