Industrial Development Research Articles

From discovery to innovation in animal health: Maturing emerging technologies for industrial development

The Discovery to Innovation in Animal Health Conference (DIAH) was organised to bridge the gap between early developers, including academia, regulators, research organizations, and spin-offs/start-ups on one side, and medium-to large-sized companies on the other. The DIAH Conference confronted and aligned vision from academia, industry and regulators, emphasizing the need for early collaboration, careful IP management, and strategic planning for successful product development and partnerships. Recent breakthroughs in vaccinology have not only accelerated the vaccine production process but have also improved antigen quality significantly. These novel technologies are likely to transform vaccine development and play a crucial role in addressing both immediate health challenges (such as cancer vaccines) and ensuring preparedness for future pandemics. The potential and pitfalls of leveraging AI to drive forward R&I activities in the field of animal health were also discussed. Researchers and entrepreneurs looking for collaboration or investment presented a series of new technologies and start-ups, respectively. A market analysis showed that the animal health industry, while highly consolidated, also shows great diversity, ranging from big pharma to companies offering diagnostics, nutritional health services, wearables, feed additives, animal feed and genetic analyses. An analysis of the investment landscape, although subject to external factors, showed that the chances for success are high when good science, a well established regulatory pathways, with a clearly defined market need can be combined with experienced management and a strong investor consortium.

Effects of general and saturated humidity on concrete performance deterioration under sulfur dioxide attack

A large amount of SO2 is emitted with the rapid development of industrialization, and there are big differences in the deterioration of concrete subjected to SO2 attack between the environments of general humidity and saturated humidity. This paper conducted the simulation tests of concrete subjected to SO2 attack at general humidity (RH = 80 %) and saturated humidity (RH = 98 %), and the sulfuration depth, mass, and compressive strength were comparatively studied. The distributions of pore-solution pH and SO2- 4 concentration of concrete at different exposure times and depths were analyzed, and the deterioration mechanisms on concrete under SO2 attack in these environments were compared. The results indicated that the sulfuration depth and mass remained unchanged in the middle and later periods of the attack at 80 % RH, and the compressive strength at 20d was still larger than that before SO2 attack. However, the sulfuration depth and mass increased rapidly at 98 % RH, and the compressive strength loss rate was 18.80 % at 20d. The ions concentrations at 98 % RH changed greatly with increasing exposure time, and the pH and SO2-4 concentration of concrete at 1 mm at 20d were 2.41 times less and 3.86 times larger than those at 80 % RH, respectively. The initial product at 80 % RH was ettringite, which converted to gypsum with the progress of SO2 attack, and these expansive products decreased the porosity of concrete. A large amount gypsum was produced at 98 % RH, leading to the initiation and propagation of microcracks, and the porosity increased to 41.43 %.

Exploration and Research on the Diversified Collaborative Education Model of Intelligent Manufacturing Professional Groups under the Background of the Integration of Suzhou Wuxi Changzhou Urban Vocational Education Circle

With the rapid development of global economic integration and intelligent manufacturing, vocational education plays an important role in cultivating high-quality technical and skilled talents. As an important base for China’s economic development and intelligent manufacturing industry, the development of vocational education in the Suzhou Wuxi Changzhou metropolitan area is particularly crucial. This article analyzes the current development status and existing problems of the Suzhou Wuxi Changzhou Urban Vocational Education Circle, constructs a diversified collaborative education model for intelligent manufacturing professional groups, and verifies the effectiveness of this model in improving education quality and promoting industrial development through empirical research and case analysis. Finally, the possible challenges and response strategies in the implementation process are discussed.

Planetary media: Decolonizing the space industry through Indigenous ownership

The colonial relationship between Indigenous people and people of European origin has been characterized by conflicts, economic exclusions, and epistemological discriminations as well as the mutual sharing of knowledge, practices, and technologies. In many cases, the industrial development of space technologies such as telescopes and rocket test sites has continued the exploitative nature of colonialism. This article, however, offers a different story and concept of Indigenous decolonization that is not antagonistic but complementary to the space industry and Western liberalism more generally. The case is Space Enterprises, a company and Earth station owned by the Center for Appropriate Technologies in Alice Springs, Northern Territories, Australia and conceived by its Aboriginal owners, workers, and board of directors as representing a beneficial integration of their Indigenous self-determination and the space industry. This essay offers synthetic decolonization as an example of this integration with Western liberalism. Understanding the flows between the Indigenous-owned Earth station and satellites, as well as the connections between Indigenous and Western liberal planetary imaginaries, requires a theory of mediation. Towards that goal, planetary media is offered as a way of conceptualizing the flows of information between local Indigenous and planetary spaces and imaginaries. This essay argues that another decolonization is possible, one based on mediation between Indigenous and Western liberal systems of thought.

Multi-perspective evaluation on spent lithium iron phosphate recycling process: For next-generation technology option

The recycling of spent lithium iron phosphate batteries has recently become a focus topic. Consequently, evaluating different spent lithium iron phosphate recycling processes becomes necessary for industrial development. Here, based on multiple perspectives of environment, economy and technology, four typical spent lithium iron phosphate recovery processes (Hydro-A: hydrometallurgical total leaching recovery process; Hydro-B(H2O2/O2): hydrometallurgical selective lithium extraction process; Pyro: Pyrometallurgical recovery process; Direct: Direct regeneration process) were compared comprehensively. The comprehensive evaluation study uses environment, economy and technology as evaluation indicators, and uses the entropy weight method and analytic hierarchy process to couple the comprehensive indicator weights. Results show that the comprehensive evaluation values of Hydro-A, Hydro-B (H2O2), Hydro-B (O2), Pyro and Direct are 0.347, 0.421, 0.442, 0.099 and 0.857, respectively. Therefore, the technological maturity of Direct should be further improved to enable early industrialization. On this basis, this study conducted a quantitative evaluation of the spent lithium iron phosphate recycling process by comprehensively considering environmental, economic and technical factors, providing further guidance for the formulation of recycling processes.

Tissue Culture Response and In Vitro Plant Regeneration of Malus 'Baiyun' (a New Cultivar of Ornamental Crabapple).

Malus 'Baiyun' (registration no. 20210210), a new crabapple cultivar, was registered in 2021 by the Nanjing Forestry Unversity. However, the difficult rooting has greatly limited the production of high-quality M. 'Baiyun' in industrialization development. There is thus a pressing need to develop an organogenesis protocol for the in vitro propagation of M. 'Baiyun' to alleviate a shortage of high-quality M. 'Baiyun' seedlings. The results showed that choosing the apical bud in mid-March was an excellent explant material. To promote proliferation, the highest proliferation (6.27) of apical shoots was cultured on Murashige and Skoog (MS) medium supplemented with 0.5 mg·L-1 6-benzylaminopurine(6-BA) + 0.05 mg·L-1 indole-3-butyric acid (IBA). Subsequently, a 100% rooting rate, average number of roots per shoot of 6.2 and maximum length of roots of 4.96 cm were obtained on half-strength Murashige and Skoog (1/2 MS) medium with the application of 0.5 mg·L-1 naphthaleneacetic acid (NAA) or 0.6 mg·L-1 NAA + 0.7 mg·L-1 IBA. Additionally, thick and lateral roots were obtained with 0.6 mg·L-1 NAA + 0.7 mg·L-1 IBA. Our study is the first to establish an effective organogenesis protocol for new crabapple cultivars using stem segments.

Analysis of the integrated role of the Yangtze River Delta based on the industrial economic resilience of cities during COVID-19

The enhancement of regional comprehensive development ability is significantly impacted by the study on the implementation effect of regional integration strategies. The integration strategy’s impact on urban development during COVID-19 in the Yangtze River Delta(YRD) is unclear. According to prior industrial transfer theory, Hefei, Anhui’s capital, is difficult to transfer industries, and other YRD cities push industry integration in Anhui. This study employs the theory of economic and land resource use to examine the resilience of the industrial economy during an epidemic by using industrial land as a representation of industrial economic development. The three cities in Anhui—Wuhu, Maanshan, and Chuzhou (Wu-ma-Chu) were selected as the research area. The study employed the UNet deep learning method to detect the land use types in Wu-ma-Chu. The land transfer matrix and the standard deviation ellipse were utilised to research the alterations in industrial land use and the spatial distribution of industrial output value, respectively. The results showed that the industrial land in Machu continued to grow during the outbreak, highlighting the resilience of the region’s industrial economy. During 2019–2022, the elliptical ring of industrial output value is distributed in Nanjing, revealing the radiating role of Nanjing in integrating into the integration of the YRD. This confirms China’s YRD integration strategy, strengthens regional economic resilience, and encourages coordinated regional economic development.

The Missing Agrarian Middle Class

During the middle decades of the twentieth century, Puerto Rico embarked on one of the most rapid processes of industrialization and economic development the world had ever seen. Yet the industrial economy that this process produced had two fundamental flaws: it featured little by way of local capital formation in the manufacturing sector, and it was incapable of producing sufficient employment for the island’s labor force. What explains these flaws? This article seeks to answer this question by drawing on the rich literature on development in East Asia. I engage with four theories that explain successful East Asian development on the basis, respectively, of unique insertion into the international political economy, robust industrial policies, economic nationalism, and agrarian reform processes that preceded industrialization. While Puerto Rico benefited from all of these factors—which may explain the relative success of development on the island—they differed qualitatively from the East Asian cases, with the possible exception of international political economy. I suggest that these differences might in turn be explained by substantial differences in pre-existing agrarian class structure. The absence of a significant stratum of smallholding agricultural producers in Puerto Rico distinguished the island from East Asian societies. It also helps explain the lack of local capital formation and employment generation built into the Puerto Rican development model, as well as the shape of industrial policy and agrarian reform and the ultimate weakness of nationalist impulses.

Designing sandwich-structured IBP nanosheets with superior antioxidant property to enhance corrosion resistance, flame retardancy, and wear resistance for polymeric coatings

The rapid development of industrialization requires the advancement of multifunctional coatings. In this study, successful self-assembly of iron porphyrin on BP nanosheets resulted in the synthesis of IBP nanosheets with a sandwich structure. Characterization tests including SEM, XPS, SPM, and XRD confirmed the successful preparation of IBP nanosheets with robust structural stability and antioxidation. Subsequently, a water-based epoxy resin (WEP) coating containing IBP nanosheets was prepared. Test results revealed that the composite coating containing 0.4 wt.% IBP nanosheets exhibited outstanding anti-corrosion, wear-resistant, and flame-retardant properties. After 42 days of immersion in a 3.5 wt.% NaCl solution, the Rct value of the 4-IBP/WEP coating was 1.79 × 109 Ω cm2, surpassing the Pure WEP coating by more than 3 orders of magnitude. Additionally, the peak heat release rate (PHRR) and wear rate of the 4-IBP/WEP coating decreased by 19.29 % and 90.97 % compared to the Pure WEP coating. This research presents a novel idea for the utilization of BP nanosheets in multifunctional coatings.

Retrospect on the Ground Deformation Process and Potential Triggering Mechanism of the Traditional Steel Production Base in Laiwu with ALOS PALSAR and Sentinel-1 SAR Sensors.

The realization of a harmonious relationship between the natural environment and economic development has always been the unremitting pursuit of traditional mineral resource-based cities. With rich reserves of iron and coal ore resources, Laiwu has become an important steel production base in Shandong Province in China, after several decades of industrial development. However, some serious environmental problems have occurred with the quick development of local steel industries, with ground subsidence and consequent secondary disasters as the most representative ones. To better evaluate possible ground collapse risk, comprehensive approaches incorporating the common deformation monitoring with small-baseline subset (SBAS)-synthetic aperture radar interferometry (InSAR) technique, environmental factors analysis, and risk evaluation are designed here with ALOS PALSAR and Sentinel-1 SAR observations. A retrospect on the ground deformation process indicates that ground deformation has largely decreased by around 51.57% in area but increased on average by around -5.4 mm/year in magnitude over the observation period of Sentinel-1 (30 July 2015 to 22 August 2022), compared to that of ALOS PALSAR (17 January 2007 to 28 October 2010). To better reveal the potential triggering mechanism, environmental factors are also utilized and conjointly analyzed with the ground deformation time series. These analysis results indicate that the ground deformation signals are highly correlated with human industrial activities, such underground mining, and the operation of manual infrastructures (landfill, tailing pond, and so on). In addition, the evaluation demonstrates that the area with potential collapse risk (levels of medium, high, and extremely high) occupies around 8.19 km2, approximately 0.86% of the whole study region. This study sheds a bright light on the safety guarantee for the industrial operation and the ecologically friendly urban development of traditional steel production industrial cities in China.

Agglomeration effects of high-tech industries: Is government intervention justified?

Government intervention in industrial development is prevalent across both developed and developing nations. This paper evaluates the efficacy of Chinese government intervention in high-tech industries in fostering economic development. Methodologically, we assess government intervention's effectiveness by examining the heterogeneity of agglomeration effects in high-tech industries across various locations before and after policy interventions. Our study reveals several key findings: (1) Overall, high-tech industry agglomeration yields positive intra-industry and local spillover effects. (2) Agglomeration effects exhibit significant spatial and temporal variations. Before 2013, government intervention was limited, and high-tech industries predominantly clustered in the eastern region due to market forces, resulting in significantly positive agglomeration effects. However, post-2013, government intervention became evident, particularly driven by competitive dynamics in less-developed regions and central government support for these areas. Consequently, high-tech industries in these regions generated positive intra-industry and local spillover effects, leading to a shift in the distribution of high-tech industry hubs towards the central and western regions. Nonetheless, agglomeration effects diminished in these regions, signaling distortions. (3) Not all high-tech industries exert positive impacts; for instance, the ICT manufacturing sector, characterized by general technology, demonstrates the most pronounced effects, whereas the aerospace manufacturing industry shows relatively weaker agglomeration effects. (4) High-tech industries primarily enhance industrial profitability by refining intermediate inputs and foster local total factor productivity and green total factor productivity through knowledge spillovers. Consequently, policy interventions should aim to effectively facilitate intermediary mechanisms. These findings offer valuable insights into how governments can judiciously intervene in high-tech industries to promote sustainable economic development.

Decoding the bitter taste of Idesia polycarpa var. vestita Diels fruit: Bitterness contribution and mechanisms

To comprehensively explore the contribution and mechanisms of identified low-threshold bitter substances in Idesia polycarpa var. vestita Diels (I. vestita) fruit, we performed quantification and elucidated their interactions with main bitter taste receptors through molecular docking. The established method for quantifying bitter compounds in I. vestita fruit was validated, yielding satisfactory parameters for linearity, stability, and accuracy. Idescarpin (17.71–101.05 mg/g) and idesin (7.88–77.14 mg/g) were the predominant bitter compounds in terms of content. Taste activity values (TAVs) exceeded 10 for the bitter substances, affirming their pivotal role as major contributors to overall bitterness of I. vestita fruit. Notably, idescarpin with the highest TAV, played a crucial role in generating the bitterness of I. vestita fruit. Hydrogen bonds and hydrophobic interactions were the main driving forces. This study holds potential implications for industrial development of I. vestita fruit by providing novel insights into the mechanism underlying its bitterness formation.

Recent advances to engineer tough basalt fiber reinforced composites: A review

AbstractBasalt fibers, known as “green materials without pollution in the 21st century”, have gained widespread attention due to its good mechanical properties. Basalt fiber‐based composites have applications in various fields such as construction, transportation, energy, and protection. However, as an inorganic fiber material, basalt fiber is hard and brittle and prone to catastrophic failure, reducing the safety of the material. Therefore, it is important to strengthen the toughness of basalt fiber‐based composites. This paper reviews the contributions made by researchers in recent years to enhance the toughness of basalt fiber reinforced composites. It mainly focuses on four aspects: physical and chemical modification of fibers surface, mixed application of multiple fibers, different textile and 3D printing technology, and design of biomimetic structures. Through these methods, the toughness of basalt fiber‐reinforced composite materials was increased by 10%–90%. In today's advocacy for green industrial development, the research and application of basalt fibers are very important for advancing the process of green development. These contributions can promote the application of basalt fiber in engineering fields.Highlights Basalt fiber is a green material without pollution. Basalt fiber reinforced composites is the key material for engineering field. Strengthening interfacial adhesion can significantly improve the toughness of composites. Basalt fibers can serve as an alternative to glass fibers in composite materials. The hybridization of basalt fibers with soft fibers can effectively enhance the toughness of composites.

Virtual human on social media: Text mining and sentiment analysis

Virtual humans are embodied agents with a human-like appearance. Despite the recent booming development that has sparked widespread academic interest, how people perceive these seemingly human but entirely fictional creations remains unclear. To explore the status, trends, emotional tendencies, and focus of attention of the Chinese public towards virtual humans, this paper utilizes text mining techniques to collect and analyze popular posts related to virtual humans on Chinese social media. The results indicate that public discussions primarily focus on the technological and industrial development of virtual humans, applications in the fields of virtual idols and virtual streamers, and the corporate investment and policy development of virtual humans. Despite positive emotions dominating, there is an increasing trend in negative emotions. Concerns are related to service failures, the uncanny valley effect, ethical crises, and technological unemployment. The research findings contribute to policymakers, industry stakeholders, and the public in understanding the general attitudes toward virtual human technology, enabling informed decision-making.

Dynamic coordinated air supply for moving individuals in industrial settings: Effectiveness evaluation and demonstration

Tracking occupant movement and reducing pollution exposure in industrial settings utilizing intelligent ventilation modes without human intervention is a challenge. This work proposes a dynamic coordinated air supply (DCAS) system incorporating static and dynamic ventilation modules, which is capable of switching air supply modes and adjusting air supply parameters in response to changing occupant positions with the assistance of computer vision technology and Internet of Things (IoT). Air movement and pollutant dispersion in an experimental chamber equipped with a DCAS system during occupant movement are analyzed through computational fluid dynamics with overset mesh method. The feasibility of the dynamic simulation method is verified by a walking experiment in the chamber. Three assessment indicators, namely, inhalation exposure, protection factor, and effective protective ratio, are identified to comprehensively evaluate the pollutant removal effectiveness of DCAS. Results show that the static ventilation module can remarkably reduce the occupant's exposure risk within its protective range. The proposed sliding and rotating modes for the dynamic ventilation module are effective in reducing occupant inhalation exposure during movement if the advance operation strategies are specified to eliminate the negative effects of protection lag. In addition, the feasibility of the IoT architecture-based DCAS system is demonstrated in a schematic laboratory. This work helps drive industrial ventilation development toward smart, healthy purposes.

Assessment of Rural Industry Integration Development, Spatiotemporal Evolution Characteristics, and Regional Disparities in Ethnic Regions: A Case Study of Inner Mongolia Autonomous Region Counties

Ethnic regions in China primarily focus on the development of agricultural and animal husbandry economies, which are relatively underdeveloped. Rural industry integration development (RIID) is considered the foundation and guarantee for ethnic regions to achieve high-quality modernization of agriculture. The purpose of this article is to measure the level of rural industrial integration in ethnic minority areas, analyze the spatial evolution and regional differences, and explore the actual situation of RIID in these regions. The aim is to provide a decision-making basis for local governments to effectively promote the development of rural industrial integration. Based on the improvement of the evaluation index system for rural industrial integration development, this paper takes the counties of the Inner Mongolia Autonomous Region as the research area. Utilizing panel data from the statistical yearbooks of 68 banners and counties in Inner Mongolia from 2011 to 2020, the panel entropy weight TOPSIS method is employed to assess the average level of rural industrial integration in the research area. The ArcGIS natural breakpoint method is employed to classify the level of RIID in county areas. Exploratory Spatial Data Analysis (ESDA) and GeoDa are utilized to analyze the spatial distribution characteristics of RIID. Finally, the Theil index is employed to analyze the regional differences in the level of RIID. The results show the following: (1) The overall level of RIID in ethnic regions is relatively low, with the contributions of the four dimensions in the evaluation index system as follows: integration path > integration foundation > integration sustainability > integration effect. The level of RIID in the study area is as follows: western region > eastern region > central region. (2) Spatially, there are positive correlations and significant spatial clustering in the level of RIID, with the spatial clustering effect of RIID weakening. (3) There are regional differences in the level of RIID, which are expanding. The inter-regional differences are decreasing, while the intra-regional differences are increasing. (4) The construction of agricultural processing facilities, financial investment, financial support, and talent policies are important influencing factors for the current stage of RIID in ethnic regions. Therefore, in the low-level development stage of RIID in ethnic regions, it is necessary to fully utilize the advantages of resource endowment, increase investment in rural infrastructure, and strengthen the guidance of talent flow into rural revitalization construction.

Industrial Sustainable Development: The Development Trend of Programmable Logic Controller Technology

Programmable Logic Controllers (PLCs) are indispensable for current and future industrial development, especially in smart factories, smart home technology, automated production lines, and machinery manufacturing. This study presents the trends in PLC software and hardware development through a technology roadmap and offers relevant suggestions to help industries achieve sustainable development, enhance market competitiveness, and provide references for research. Through expert interviews and fuzzy Delphi analysis, this study points out that future PLC development needs to focus on editing interfaces, syntax, Central Processing Units, Memory Units, and Communication Modules. Specific recommendations include visualizing regional/global label settings and connection settings, adding Python, JAVA, LabVIEW, and Scratch syntax, improving instruction execution speed, expanding program and expansion capacities, and adopting dual-channel Ethernet and connections to external networks and wireless networks. Fuzzy hierarchical analysis shows that Communication Modules are the most important component, followed by Central Processing Units and syntax expansion, and, finally, program and expansion capacity enhancements. These suggestions aim to promote product innovation and social environment demand evaluation, enhance product competitiveness, and achieve sustainable development goals.

Impact of grain export on the Russian Empire’s industrial development in the late nineteenth and early twentieth centuries

ABSTRACT This paper investigates the influence of grain export on Russia’s industrial development during the late nineteenth and early twentieth centuries. Employing ARDL, NARDL, and VECM models, the authors explored how grain export affected industrial growth, ultimately concluding a long-term negative impact on Russia's industry. The study identifies four channels of influence: consumption, savings, distribution of labour, and investment. Specifically focusing on the investment-related channel, the authors observed a negative long-term impact of grain export on industrial capital. This deduction is rooted in the dominance of small-scale grain exporters during the period, resulting in widely dispersed export profits among intermediaries. Moreover, traders showed a preference for investing outside Russia, contributing to the limited investment within the country's industrial sector.

Prediction of pollutant emission characteristics in ISO50001 energy management in the Americas: Uni and multivariate machine learning approach

The American continent is experiencing significant economic and industrial development driven by sustainability principles. In this context, discussions on improving energy consumption have become increasingly frequent and dynamic across various sectors of civil society, including the implementation of energy efficiency measures as advocated by the ISO50001 energy management standard. However, there is a pressing need to investigate which socioeconomic aspects are responsible for the issuance of this certification in the Americas and how these factors relate to characteristic industrial emissions, especially particulate matter. This study aims to evaluate the socioeconomic factors influencing ISO50001 standard issuance and how these adjusted factors correlate with particulate matter of 2.5 μm and 10 μm dimensions. To achieve this, machine learning techniques were employed, considering the complex nature and risk of data overfitting. Model fitting was performed through multiple lasso regression, and the relationship between the adjusted factors was examined through cross-correlation analysis. The analyses indicate a strong correlation of adjusted macroeconomic indicators, especially with PM2.5, suggesting an association with cardiorespiratory problems and methane-related origins. This work is of great relevance to academia as it proposes new concepts regarding the interaction between energy efficiency standards and particulate matter. For the industrial sector, the adjusted factors provide guidance for standard implementation while also helping to mitigate health issues. Additionally, for the government, these results can assist in formulating policies to address specific health problems related to this area.

Assessing PM2.5 Dynamics and Source Contributions in Southwestern China: Insights from Winter Haze Analysis

Despite enhancements in pollution control measures in southwestern China, detailed assessments of PM2.5 dynamics following the implementation of the Clean Air Action remain limited. This study explores the PM2.5 concentrations and their chemical compositions during the winter haze period of 2017 across four major urban centers—Chengdu, Chongqing, Guiyang, and Kunming. Significant variability in mean PM2.5 concentrations was observed: Chengdu (71.8 μg m−3) and Chongqing (53.3 μg m−3) recorded the highest levels, substantially exceeding national air quality standards, while Guiyang and Kunming reported lower concentrations, suggestive of comparatively milder pollution. The analysis revealed that sulfate, nitrate, and ammonium (collectively referred to as SNA) constituted a substantial portion of the PM2.5 mass—47.2% in Chengdu, 62.2% in Chongqing, 59.9% in Guiyang, and 32.0% in Kunming—highlighting the critical role of secondary aerosol formation. The ratio of NO3−/SO42− and nitrogen oxidation ratio to sulfur oxidation ratio (NOR/SOR) indicate a significant transformation of NO2 under conditions of heavy pollution, with nitrate formation playing an increasingly central role in the haze dynamics, particularly in Chengdu and Chongqing. Utilizing PMF for source apportionment, in Chengdu, vehicle emissions were the predominant contributor, accounting for 33.1%. Chongqing showed a similar profile, with secondary aerosols constituting 36%, followed closely by vehicle emissions. In contrast, Guiyang’s PM2.5 burden was heavily influenced by coal combustion, which contributed 46.3%, reflecting the city’s strong industrial base. Kunming presented a more balanced source distribution. Back trajectory analysis further confirmed the regional transport of pollutants, illustrating the complex interplay between local and distant sources. These insights underscore the need for tailored, region-specific air quality management strategies in southwestern China, thereby enhancing our understanding of the multifaceted sources and dynamics of PM2.5 pollution amidst ongoing urban and industrial development.