The 2018 Global Innovation Index ranks Pakistan 118 out of 126 in innovation. One the main reasons why developing countries, such as Pakistan, fail to innovate is their improvisation astute and concurrent knowledge. This study explores contemporary hurdles that lead manufacturing firms' low agility innovation performance. Based on theory dynamic capability view absorptive capacity, we propose knowledge absorption capacity firms can help them organize or utilize capabilities, big data...

The structure and control strategy of a novel two-phase brushless main exciter (ME) are proposed in this paper to solve the excitation problem generator (MG) when aircraft wound-rotor synchronous starter/generator start up as motor. Two-phase symmetrical winding is adopted field ME supplied with ac by inverter starting mode dc traditional unit generation mode. In order make current MG remain constant during start-up process, method for proposed, which contains feedback currents speed...

Abstract Second-hand clothing (SHC) benefits society by reducing the wastage of natural resources. Research in purchase second-hand is a debated topic. It not yet clear whether caring for self, community, and nature drives clothing. This study unpacks intervening factors that drive purchases underpinning attitude-intention self-determination theories. The primary purpose to examine direct relationship between a) mindful consumption, b) ego-involvement, c) social norms on intention young...

The COVID-19 pandemic has had a substantial impact on the retail industry around globe, including in vast market of India. response to required stores close and develop new ways approach shoppers more efficiently. worldwide usage social media enabled growth commerce (s-commerce). Influencers s-commerce platforms use live broadcasting their channels promote endorsed products. features influencers enhance users' trust online community intention, impacting purchasing intentions. In this study,...

Digital transformation has become an important channel for firms to build a competitive advantage in the digital economy. However, user participation, source of external knowledge firms, received limited attention research related transformation. Drawing on knowledge-based view, study uses sample 247 Chinese investigate impact firm performance. The examines mediating role participation between and performance moderating both environmental dynamics absorptive capacity relationship Findings...

The crisis caused by COVID-19 has forced many vendors to consider alternative marketing strategies, such as live streaming on social commerce platforms. Social involves using streamers endorse and sell products their own media accounts. Statistics show that this format can serve a survival tool for in exceptional circumstances. However, it is also valuable opportunity bring innovation engagement traditional e-commerce vendors. Based sample of 621 Chinese consumers, empirical research...

Pangolins are mammals of important conservation interest, as only eight extant species remain globally and all considered to be at risk extinction. The Sunda pangolin (Manis javanica) is a burrowing nocturnal animal with poor vision, thus intraspecies communication such mating, warning, scent-marking relies on olfaction. specific pheromone involved in pangolins remains unknown. In this study, odorant-binding proteins functionally expressed screened against panel 32 volatiles that derived...

With the rapid development of Generative AI technology, businesses need their marketers to adopt it assist in completing job tasks. However, are not entirely optimistic and may feel anxious concerned about it. This research explores how anxiety affects marketers' AI-generated content intention. Based on social cognitive theory, this study empirically examines impact intention use content, including mediating role trust moderating effect self-efficacy. Using survey data from 495 marketers, we...

This study explored the emotional drivers of slow fashion consumption through big data analysis. Python was used to capture more than 10,000 clothing review from e-commerce platforms, and advanced analysis (LDA, TF-IDF, semantic network) reveal consumers systematically. The research results show that consumers' purchase decisions are no longer limited traditional quality comfort but multi-dimensional needs. Highlight connection between needs better serve demonstrate community's well-being life.

This paper proposes a hybrid sensorless control strategy for rail transit application employing interior permanent magnet synchronous machine (IPMSM), which works under low switching frequency. Due to long system time delay, the convergence rate of estimated position in dynamic region is reduced. As speed increases, dq axes currents coupling more severe, and deteriorates performance. In order solve these problems, analysis time-delay effect on IPMSM drives first derived. Then, using q-axis...

Accurate information about the field current of wound-rotor synchronous starter generator (WRSSG) is prerequisite for optimal start control research WRSSG in starting mode. However, as winding rotating parts and there no slip ring brush mounted shaft, measurement not possible. A estimation method from brushless exciter side was proposed this paper. In method, rotor currents voltages asynchronous were first estimated then used to calculate through parametric average-value model rectifier....

This study proposes a novel mathematical model based on excitation system output equations (ESOEs) to evaluate the steady‐state performance of three‐phase brushless asynchronous (BAES) wound‐field synchronous aircraft starter–generator system. The could be used field current capabilities BAES and provide reference for control schema BAES. However, has unknown multivariable non‐linear characteristics, which give rise difficulty in modelling performance. Meanwhile, without closed‐loop main...

An integrated starter/generator based on the wound-rotor synchronous machine is becoming increasingly popular in modern aircraft due to advantages of high safety and low cost maintenance. Constant field current for main generator (WRSSG) can simplify start control scheme distinctly starting mode. In order achieve constant generator, three detailed excitation methods two-phase brushless exciter WRSSG mode were proposed compared this paper. And these methods, feedback currents speed reference...

This study focuses on the identification of rotating diode failures an aircraft wound‐field synchronous starter–generator system. Owing to difference in topography between DC field excitation system and three‐phase brushless asynchronous (TBAES), diodes failure methods for cannot be implemented TBAES. To solve this problem, presents theoretical analysis effects TBAES rotor current. The shows that third fundamental components current could treated as features. When a operates open‐circuit...

Wound-rotor synchronous starter/generator (WRSSG) has been widely adopted in the modern aircraft. The uncertainty of inductive saliency WRSSG (the may change, disappear, or reverse during starting process) makes it difficult to implement sensorless low speed region. This paper proposes a dual-machine injection method for control WRSSG, which is able eliminate dependency on machine rotor position estimation. Using multi-stage structure proposed method, high frequency (HF) voltage injected...

Recently, most wireless power transmission (WPT) systems have used a "one-to-one" charging method of one receiving coil to transmitting coil. However, when the is offset in this way, mutual inductance between and coils will be weakened, flexibility WPT system application also reduced. Therefore, how realize "one-to-many" mode multiple ensure stability loads an urgent problem solved. In order solve above problems, LCC-S topology combined with three-phase circuit, omnidirectional scheme...

The changeable magnetic saliency of main machine (MM) in aviation three-stage stator/generator (ATSG) makes it difficult to implement the sensorless starting low speed region by saliency-based methods. To estimate rotor position ATSG (which is also MM), a novel estimation method based on harmonic currents exciter (ME) stator windings produced rotating rectifier proposed this article. sine and cosine functions without time delay are extracted from ME constant frequency signal sampling method....

Environmental problems are one of the major concerns in China due to booming industries and large-scale production. Manufacturing must change traditional approaches production supply chain management practices cope with environmental issues. For this purpose, a multidisciplinary empirical study has been conducted China. In manufacturing around world, there is noticeable transition human resource toward green (GHRM). However, training could be considered as critical element GHRM used an...

The authenticity of controversial species is a significant challenge for systematic biologists. Moschidae small family musk deer in the Artiodactyla, composing only one genus, Moschus. Historically, number has been debated. Presently, most were restricted Tibetan Plateau and surrounding/adjacent areas, which implied that evolution Moschus might have punctuated by uplift Plateau. In this study, we aimed to determine evolutionary history delimit exploring complete mitochondrial genome (mtDNA)...

The study aims to establish a platform-based enterprise credit supervision mechanism, and combined with big data, accurately evaluate the assets of enterprises under influence social stability risk, improve ability deal risks. Using descriptive statistical methods, shows that most local exist in form micro loans, which promotes development economy certain extent, but it is vicious cycle economic development; overall prediction accuracy single risk assessment model 65%. Compared algorithm,...

This article proposes a rotor position estimation method for brushless electrically excited synchronous starter/generator (BEESSG) at low speed region. Based on the multistage characteristics of BEESSG, two high frequency pulsating voltages with different frequencies are injected into phase <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\alpha$</tex-math></inline-formula> and...