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This paper aims to investigate the stress corrosion cracking (SCC) process of sensitized 304 stainless steel during the slow strain rate test by using the electrochemical noise (EN) technique.

EN data are interpreted based on chaos and wavelet analyses, and correlation dimension and wavelet energy distribution are used as indicators for SCC process identification.

Experimental results reveal that the corrosion potential abruptly decreases from 180 to 100 mV at 6,300 s and the current increases from 10 to 100 nA accordingly, which is attributed to passive film breakdown and crack initiation. Chaos and wavelet analyses results reveal that, as crack initiates, the correlation dimensions increase from 1.2 to 1.9, and the corresponding distribution frequencies of maximum relative wavelet energy change from high frequency to low frequency.

SCC is monitored in lab, and crack initiation and propagation are identified by chaos and wavelet analyses. This work lays the foundation for SCC detection in field using EN.

Let p_[1,r;t] be defined by ∑n=0∞p[1,r;t](n)qn=(E1Er)t, where t is a non-zero rational number, r ≥ 1 is an integer and Er=∏n=0∞(1−qr(n+1)) for |q| < 1. The function p_[1,r;t](n) is the generalisation of the two-colour partition function p_[1,r;−1](n). In this paper, the authors prove some new congruences modulo odd prime ℓ by taking r = 5, 7, 11 and 13, and non-integral rational values of t.

Using q-series expansion/identities, the authors established general congruence modulo prime number for two-colour partition function.

In the paper, the authors study congruence properties of two-colour partition function for fractional values. The authors also give some particular cases as examples.

The partition functions for fractional value is studied in 2019 by Chan and Wang for Ramanujan's general partition function and then extended by Xia and Zhu in 2020. In 2021, Baruah and Das also proved some congruences related to fractional partition functions previously investigated by Chan and Wang. In this sequel, some congruences are proved for two-colour partitions in this paper. The results presented in the paper are original.

Security is one of the major challenges in the design and implementation of protocols for mobile ad hoc networks (MANETs). In such systems, the cooperation between nodes is one of the important principles being followed in the current research works to formulate various security protocols. Many existing works assume that mobile nodes will follow prescribed protocols without deviation. However, this is not always the case, because these networks are subjected to a variety of malicious attacks. Since there are various models of attack, trust routing scheme can guarantee security and trust of the network. The purpose of this paper is to propose a novel trusted routing model for mitigating attacks in MANETs.

The proposed model incorporates the concept of trust into the MANETs and applies grey relational analysis theory combined with fuzzy sets to calculate a node’s trust level based on observations from neighbour nodes’ trust level, these trust levels are then used in the routing decision-making process.

In order to prove the applicability of the proposed solution, extensive experiments were conducted to evaluate the efficiency of the proposed model, aiming at improving the network interaction quality, malicious node mitigation and enhancements of the system’s security.

The proposed solution in this paper is a new approach combining the fundamental basics of fuzzy sets with the grey theory, where establishment of trust relationships among participating nodes is critical in order to enable collaborative optimisation of system metrics. Experimental results indicate that the proposed method is useful for reducing the effects of malicious nodes and for the enhancements of system’s security.

China's securities market is growing gradually as well as the investors, analysts, intermediates and regulation authorities. Accounting earnings is a key determinant among the factors influencing stock prices, which even overreacts to earnings. Split‐stock reform (all‐circulation reform) in China provides a chance for investors to revaluate the stock prices. The purpose of this paper is to investigate the market reaction during the reform from the perspective of accounting conservatism.

Using the data of companies completing the split‐stock reform, this paper empirically investigates how the accounting conservatism influences the market reaction around re‐open day after the reform.

Accounting information plays its role on stock pricing through the reform of split‐stock reform in the China securities market, evident in the significantly positive relation between the proxies of accounting conservatism and cumulative abnormal returns for one day, three days, ten days and 30 days around re‐open day after the reform. Also, the profitability of listed firms in the past will further improve the positive relation between conservatism and market reaction.

There is ample theoretical work on stock pricing of accounting conservatism but empirical work is scarce, so this paper provides more evidence for the role of stock pricing of accounting conservatism, especially in emerging markets. Second, current research on accounting conservatism in China is focusing on whether conservatism exists and how the conservatism varies; this paper further extends the research field of conservatism from the pricing perspective. Third, researches based on the determinants of stock compensation and market reaction on stock reform lack theoretical analysis, while this paper provides a theory basis for the market reaction during the stock reform.

This study investigates service adaptation in a business-to-business context and explores the characteristics of service adaptation and how it takes place in business-to-business markets.

Two case studies were employed to obtain both suppliers’ and customers’ perceptions of service adaptation in a business-to-business context.

The findings captured both suppliers’ and customers’ adaptation in a business-to-business service context. It revealed customers’ active adaptation in assisting suppliers in the business-to-business service process. Suppliers’ willingness to make adaptation appears to have an impact on their relationships with customers. Business-to-business service adaptation is a dynamic and interactive process.

The findings shed light for practitioners not to neglect customers’ active participation, but to understand customers’ role in making adaptation with suppliers in the service process to enhance their service experience and business-to-business relationships. The research is exploratory and the findings of these two case studies may be influenced by the manufacturing sector in which the case study firms are based.

This paper illustrates that the interactive nature of service adaptation is particularly pertinent in a business-to-business context and that the phenomena needs much more careful attention as it provides a potential area for marketing managers to achieve service differentiation.

Technological development has not only helped in effective integration of renewable sources but also made it possible for consumers to participate in system operation. Different market players are coming up in the electricity market, microgrid being one of them. Thus, this paper aims to investigate consumers’ role in the dispatch of a microgrid system that has a hybrid market structure under varied system conditions.

The mathematical model developed has been solved by the CONOPT solver in the GAMS optimization tool. GAMS-MATLAB interfacing is done to obtain solutions.

The problem formulated shows the effect of consumers in dispatch and overall operational cost. Consumers’ participation has been proposed through a quadratic cost function. The system operation under pool and bilateral contracts has been investigated. It shows that proper incentives to the consumers can help in reduction and effective management of the demand, carbon emission and overall system operational cost.

This paper considers the hybrid market structure to find the load dispatch in a microgrid system. The participation of consumers in the microgrid system has been implemented considering variations in wind power, solar power and load. The power exchange between the grid and microgrid system has been modeled showing the contribution of the consumers in system operation.

This study aims to examine the impact of various dimensions of product market competition on accounting conservatism particularly in the wake of regulatory changes and varying ownership structures in China.

This study examines impact of product market competition on accounting conservatism by using conservatism measure of Khan and Watts (2009) and measures for important dimensions of competition such as competition intensity, non-price competition and competition from existing rivals and potential entrants.

The findings suggest that competition intensity and non-price competition result in higher conservatism. This study also advocates that industry leaders exhibit lower conservatism as compared to industry followers. Moreover, the authors document positive association between competition from existing/potential rivals and accounting conservative. These findings reveal that regulatory changes (International Financial Reporting Standards adoption) influence the effect of various dimensions of competition on conservatism. The authors also propose that financial reporting practices of state-owned enterprises are not influenced by competition. However, competition affects financial reporting (conservatism) when institutional or managerial ownership is higher.

The authors document that strategic considerations shape conservative financial reporting decisions of the managers. This study also advocates that when regulatory changes affect the influence of competitive pressure on the conservative reporting decisions of the mangers. Findings also suggest that unlike state ownership, institutional as well as managerial ownership affects the influence of competition on managerial decisions like conservative financial reporting. These results are robust to various alternative measures of conservatism.

The purpose of this paper is to propose a novel hybrid excitation permanent magnet synchronous generator (HEPMSG) utilizing tooth harmonic for excitation, the structural features and operation principle of which are also described.

To obtain the operation performance quickly, this paper derives the mathematical model of the machine system represented by circuit, and analyzes the operation mode of rectifier circuit in the tooth harmonic excitation system, then the standard state equations for each operation mode are obtained. Combining the inductance parameter of this machine with the load resistance and inductance, the armature current waveform, the field current waveform and tooth harmonic winding current waveform are obtained by using the numerical method to solve the standard state equation.

Comparing with the experimental results, the availability of the principle and the validity of the model of the machine system are verified.

This HEPMSG is a new brushless self-excited and self-regulated generator, which is suitable for an independent power source.

Unlike the existing hybrid excitation permanent magnet machine, this HEPMSG utilized the inherent tooth harmonic EMF of the rotor to adjust the air-gap magnetic field of the permanent magnet machine.

This article presents an advanced method for managing knowledge using a modular design approach and applied the approach through an example with computer manufacturing. The benefits of modularity are discussed both within and between companies. We find that through modular design, knowledge management systems are simplified and communication between modules is greatly improved. In addition, modularity makes parallel innovation possible, as well as, sharing innovative resources through collaboration. Modularity leads to effective knowledge sharing and thus stimulates knowledge-based innovation. A case study of the computer industry further demonstrates the effects of modularity in an industry. Finally, we suggest that enterprises should take advantage of modularity when they carry out knowledge-based innovation and the measures are developed to implement successful modularity.

This study aims to explore how business-to-business service failures manifest in a manufacturing context.

The empirical research involved two case studies: case study one included 20 interviews in the metal finishing industry; case study two included 20 interviews in the paint and coatings industry. In both case studies, suppliers and customers’ perceptions were obtained to facilitate a dyadic understanding of the phenomena.

Business-to-business service failure is a complex, dynamic and interactive process. It varies according to type of service, services supporting the products and services supporting the customers, service quality dimensions and the source of the failure. It can have a more profound impact than service failure in a consumer context because it may cause disruption to customers’ production and have a negative influence of failure on their clients in the network.

Business customers may play a role in value co-destruction rather than value co-creation by causing service failures due to errors on their part. The consequences of the domino effects revealed in this study need to be given careful consideration by managers. The research is exploratory, and the findings may be influenced by the manufacturing sector in which the case study firms are based.

Business-to-business service failure has its own distinct characteristics, as it may impact widely in the business-to-business network. Domino effects implicitly dominate business-to-business service failure episodes where negative outcomes cascade downstream and affect service recipients’ customers.