Inter-stage performance and energy characteristics analysis of electric submersible pump based on entropy production theory

The electric submersible pump(ESP) is a crucial apparatus utilized for lifting in the oil extraction process.Its lifting capacity is enhanced by the multi-stage tandem structure, but variations in energy characteristics and internal flow across stages are also introduced. In this study, the inter-stage variability of energy characteristics in ESP hydraulic systems is investigated through entropy production(EP) analysis,which incorporates numerical simulations and experimental validation. The EP theory facilitates the quantification of energy loss in each computational subdomain at all ESP stages, establishing a correlation between microscopic flow structure and energy dissipation within the system. Furthermore, the underlying causes of inter-stage variability in ESP hydraulic systems are examined, and the advantages and disadvantages of applying the EP theory in this context are evaluated. Consistent energy characteristics within the ESP, aligned with the distribution of internal flow structure, are provided by the EP theory, as demonstrated by our results. The EP theory also enables the quantitative analysis of internal flow losses and complements existing performance analysis methods to map the internal flow structure to hydraulic losses. Nonetheless, an inconsistency between the energy characterization based on EP theory and the traditional efficiency index when reflecting inter-stage differences is identified. This inconsistency arises from the exclusive focus of the EP theory on flow losses within the flow field, disregarding the quantification of external energy input to the flow field. This study provides a reference for the optimization of EP theory in rotating machinery while deeply investigating the energy dissipation characteristics of multistage hydraulic system, which has certain theoretical and practical significance.

Heritage Communities in Consumer Contexts Spatial Production of Tourism Research-Take Qixian Zhao Yu Historical City as an Example

Taking Zhaoyu Historical City in Qixian County as an example,this paper explores the production process of tourism space in Zhaoyu Historical City in the context of consumption,based on Lefebvre's triadic dialectic theory.The study reveals that,driven by the development of tourism,subjects such as the government and planners possess absolute dominance over spatial representations,while residents demonstrate receptive and adaptive action strategies and social relations are reproduced,presenting a harmonious state.Further exploring the tourism community in the environmental performance of the subject of action,social relations,consumption demand,daily life practice,cultural capital,etc.,the daily life practice of the tourism community has transcended the original logic of tourism spatial production and has a certain extension.The mechanism analysis in this paper can help guide the healthy development of tourism space in the neighboring historical cities or communities and achieve the dual purpose of promoting the economic development of the community and heritage protection.

Fuzzy linear model for production optimization of mining systems with multiple entities

Planning and production optimization within multiple mines or several work sites （entities） mining systems by using fuzzy linear programming （LP） was studied. LP is the most commonly used operations research methods in mining engineering. After the introductory review of properties and limitations of applying LP, short reviews of the general settings of deterministic and fuzzy LP models are presented. With the purpose of comparative analysis, the application of both LP models is presented using the example of the Bauxite Basin Niksic with five mines. After the assessment, LP is an efficient mathematical modeling tool in production planning and solving many other single-criteria optimization problems of mining engineering. After the comparison of advantages and deficiencies of both deterministic and fuzzy LP models, the conclusion presents benefits of the fuzzy LP model but is also stating that seeking the optimal plan of production means to accomplish the overall analysis that will encompass the LP model approaches.

Research on the Problem of Art Production Theory Since the New Period

The issue of art production is an important topic discussed in China’s academia. The article first discusses thetheoretical issues of early art production in China, mainly taking Mr. Dong Xuewen’s views as an example. Second,scholars have their own views on the discussion of the unbalanced development of art production and materialproduction in the 1970s and 1980s. Third, this article uses the art production theory to construct the contemporaryliterary art form, and raises the art production theory to the essentialism to discuss the art production theory and thereflection theory. Fourth, the relationship between art production and art consumption is in large-scalecomprehensive systematic research.

Anderson's Cognitive Theory and Learning Strategy Studies in Second Language Acquisition

Second language acquisition can not be understood without addressing the interaction between language and cognition. Cognitive theory can extend to describe learning strategies as complex cognitive skills. Theoretical developments in Anderson’s production systems cover a broader range of behavior than other theories, including comprehension and production of oral and written texts as well as comprehension, problem solving, and verbal learning.Thus Anderson’s cognitive theory can be served as a rationale for learning strategy studies in second language acquisition.

Media Narratives and the Conceptualization of Tea： A Case Study of Teavana＇s Oprah Chai Tea

More than just a drink, tea embodies social, cultural, economic and political meanings through time and across cultures. There is an essential tie between media and this meaning-making process. Media often create and carry the visions of health, nature, tranquility, and prosperity offered by tea. This mediated imaginary seems to persist even in the face of vast human inequalities and suffering and irreversible negative environmental impacts through the current practice of tea production under global conglomerates. Through textual analysis of media narratives of Teavana, a well-known tea brand, this project explores how media＇s mythic narratives potentially naturalize and celebrate the current production practice and the conspicuous consumption of tea, and silence the human suffering and environmental destruction endured, in order to gratify the very practice and consumption promoted by media.

Subsistence Wages, Private Indebtedness and Aggregate Demand＂ A Post Keynesian Classical Interpretation of the Current Crisis

This paper aims at providing an interpretation of economic crises within a theoretical framework where some elements of classical political economy are superimposed on the theoretical framework of the monetary theory of production. The dynamics of wages, of conspicuous consumption on the part of rentiers and of investments are taken into consideration, in order to show that economic crises largely depend on the combination of declining wage shares, increasing financial rents and the reduction of investments.

Real-variable characterizations of anisotropic product Musielak-Orlicz Hardy spaces

Let A :=(A_1, A_2) be a pair of expansive dilations and φ : R^n×R^m×[0, ∞) → [0, ∞) an anisotropic product Musielak-Orlicz function. In this article, we introduce the anisotropic product Musielak-Orlicz Hardy space H~φ_A(R^n× R^m) via the anisotropic Lusin-area function and establish its atomic characterization, the g-function characterization, the g_λ~*-function characterization and the discrete wavelet characterization via first giving out an anisotropic product Peetre inequality of Musielak-Orlicz type. Moreover, we prove that finite atomic decomposition norm on a dense subspace of H~φ_A(R^n× R^m) is equivalent to the standard infinite atomic decomposition norm. As an application, we show that, for a given admissible triplet(φ, q, s), if T is a sublinear operator and maps all(φ, q, s)-atoms into uniformly bounded elements of some quasi-Banach spaces B, then T uniquely extends to a bounded sublinear operator from H~φ_A(R^n× R^m) to B. Another application is that we obtain the boundedness of anisotropic product singular integral operators from H~φ_A(R^n× R^m) to L~φ(R^n× R^m)and from H~φ_A(R^n×R^m) to itself, whose kernels are adapted to the action of A. The results of this article essentially extend the existing results for weighted product Hardy spaces on R^n× R^m and are new even for classical product Orlicz-Hardy spaces.

Investigating Disfluencies in E-C Sight Translation

Spoken language is marked by para-verbal and non-verbal dimensions,such as silent pause,hesitation,and intonation.Fluency is considered as an essential parameter for evaluating the quality of oral output.Sight translation is a hybrid form of written translation and oral interpreting;however,fluency in sight translation is an underresearched topic.This paper examines the disfluencies in the sight translation of professional and novice translators working from English to Chinese.It adopted a statistical approach to compare the silent pauses and hesitation fillers in the delivery of professional and student participants.According to the independent samples t-test results,the differences were significant in the occurrence and ratio of hesitation between professional and student participants.It can be inferred that professional translators are more apt at coping tactics,such as pausing for several seconds,rather than inserting hesitation fillers unconsciously.Furthermore,the corpus-assisted analysis suggested a higher lexical density among professional participants,followed by the think-aloud approach,which revealed the causes for disfluencies.By drawing upon the Speech Production Theory,the paper found six most influential factors:vocabulary,emotion,syntactic category,speaking habit,lexical ambiguity,and topical difficulty.It is hoped that translation and interpreting studies will not be confined to linguistic dimensions.Paralinguistic signs should have their places in the domain of translatology.Semiotics of translation,which views translation as a pure semiotic act,thereby provides a valued perspective for translation and interpreting studies.