Search Results (100)

The efficient use of associated petroleum gas (APG) is one of the key challenges facing the oil and gas sector because it is directly related to reducing hydrocarbon losses, lowering emissions, and improving the sustainability of energy systems. The aim of the study is to develop a multi-criteria risk assessment system for APG utilization projects in three BRICS countries, using Russia, China, and India as examples. Methodologically, the study combines expert risk ranking based on the Fishburn method, spatial aggregation across 16 oil and gas clusters, and hierarchical graph modeling, which makes it possible to trace the transition from local technological constraints to the level of architectural strategies. As a result, a unified risk matrix was constructed, including risks of leaks, fluctuations in gas composition, raw material quality requirements, infrastructure constraints, and the energy intensity of processes. The resulting assessments showed that the risk profiles of clusters differ significantly both between countries and within them. For Russian clusters, leaks and infrastructure constraints proved to be more significant; for some Chinese clusters, gas composition and quality were more critical; whereas Indian clusters are characterized by a mixed profile of constraints. It was concluded that projects involving the use of APG require a cluster-oriented approach, and that universal technological solutions that do not account for the territorial structure of risks have limited applicability. Full article

As a strategic node of the Silk Road Economic Belt and a prototypical valley-type city, Lanzhou is subject to the dual constraints of rapid urbanization and an inherently fragile ecological foundation, making the coordination between urban expansion and ecosystem services a critical issue for regional sustainability. Drawing upon multi-temporal land use remote sensing datasets provided by the Chinese Academy of Sciences Resource and Environment Science Data Center, in conjunction with soil, meteorological, and socio-economic data, this study integrates a land use transition matrix, the InVEST model, a modified coupling coordination degree model, and the geographic detector to comprehensively examine land use dynamics, the spatiotemporal evolution of urban expansion, and the spatial heterogeneity of ecosystem services (i.e., carbon storage, water yield, habitat quality, and soil conservation) in Lanzhou. In addition, the coupling coordination relationship and its underlying driving mechanisms are systematically explored. The results demonstrate the following: (1) Between 1980 and 2020, urban land area in Lanzhou increased from 103.87 km² to 286.83 km², accounting for 2.17% of the total area, with cropland constituting the dominant source of expansion and exhibiting a fluctuating “high–low–high” conversion trajectory. (2) Ecosystem services exhibit pronounced spatial heterogeneity, with carbon storage and habitat quality displaying a pattern of “low in the southeast and high in the northwest”, water yield showing an increasing gradient from southeast to northwest, and soil conservation characterized by “lower values in central areas and higher values in peripheral regions”; (3) Urban expansion has accelerated significantly, with Yongdeng County and Gaolan County emerging as principal expansion hotspots during 2010–2020. (4) The dominant driving mechanism gradually shifted from natural factors to the synergistic interaction between natural and socioeconomic factors, and the interaction among driving factors markedly enhanced the explanatory power for ecosystem service evolution. (5) The coupling coordination degree has transitioned from widespread imbalance to a spatially differentiated pattern, characterized by relatively coordinated conditions in peripheral areas and persistent imbalance within the central urban core. These findings provide a robust scientific basis for territorial spatial optimization and the synergistic development of ecological and economic systems in valley-type cities, and offer important implications for sustainable development in arid and semi-arid regions. Full article

What drives persistent urban–rural tourism satisfaction gaps: whether from promotional over-promising or structural service deficits? This distinction fundamentally determines whether territorial development resources should target marketing sophistication or productive capacity, yet remains empirically unresolved. Text-mining for 33,174 attractions across 349 Chinese cities reveals that both rural and urban destinations systematically under-promise, with description sentiment falling consistently below actual ratings, contradicting the “digital facade” hypothesis. Urban attractions nonetheless generate more positive surprises through superior service delivery (gap = 0.62 vs. 0.55). Sentiment measurement robustness is validated through triangulation of two independent dictionary-based methods ($r=0.58$, $p<0.001$) and cross-paradigm verification using a pre-trained BERT transformer ($\tau =1.000$ ranking stability). SHAP decomposition quantifies the policy implication: controllable service quality indicators, including description quality (23.2%), information richness (30.7%), and price positioning (16.5%), collectively explain over 70% of the variance in satisfaction, while fixed geographic factors (rural classification 14.9% and city-tier 14.7%) account for 29.6%, yielding a controllable-to-geographic ratio of 2.4:1. Propensity score matching with six covariates confirms a 0.074–0.100-point rural penalty persists after controlling for confounders, while non-linear analysis demonstrates that rural attractions face no marginal productivity disadvantage, and the challenge is baseline capacity, not investment efficiency. For policymakers pursuing Sustainable Development Goals 8, 10, and 12 through tourism-led regional strategies, these results mandate redirecting resources from demand-side expectation management toward supply-side infrastructure and workforce development, the true binding constraint on rural competitiveness. Full article

The conflict between rapid industrialization and ecological deterioration constitutes a critical bottleneck for developing regions, particularly concerning industrial wastewater governance. The primary purpose of this study is to investigate whether industrial robotization (IR) can break this deadlock. This study proposes the central hypothesis that adopting IR significantly mitigates industrial wastewater emissions (IWE). Utilizing comprehensive panel data from 30 Chinese provinces from 2013 to 2022, this proposition is rigorously tested using fixed effects models. The main results clearly demonstrate that IR acts as a robust suppressant against IWE. Importantly, mechanism verification shows that this pollution reduction effect is propelled by stimulating green patents and amplifying technical expenditure. The empirical evidence reveals distinct nonlinear features regarding how IR affects IWE. Crucially, heterogeneity analysis indicates that the emission reduction utility of IR becomes significantly more pronounced in territories with robust financial depth and targeted policy backing. Consequently, this study provides vital strategic blueprints for policymakers to leverage industrial automation to navigate the sustainability crisis. Full article

Amid the accelerating agenda of Chinese-style modernization, China’s territorial spatial planning is undergoing a major transition and facing mounting challenges, while the theoretical foundations that support this transition remain at an early stage and require further integration. Drawing on holism, this paper operationalizes a cognition–relation–testing governance chain and develops an analytical framework to explain the institutional evolution and governance performance of China’s territorial spatial planning. Using clause- and paragraph-level evidence units from policy and planning texts, the study reviews and compares five historical stages of China’s territorial spatial planning, emphasizing simultaneous consistency across the three levels and a replicable diagnostic procedure. Building on this analysis, the paper proposes a holistic coordination pathway oriented toward modernization governance: it anchors implementation in auditable trade-off rules and executable boundary instruments, strengthens collaboration and conflict-adjudication procedures, and embeds a closed loop of “evaluation–adjustment–accountability” across the full planning life cycle, thereby providing an analytical approach and indicator toolkit for assessing the degree of governance closure in planning practice. Full article

Situated within the field of modern Chinese political history, this study investigates the Late Qing New Policies (1901–1911) as a pivotal transition from a traditional tributary empire to a modern multi-ethnic nation-state. A critical limitation in current scholarship is the tendency to reduce these reforms to mere expedients for dynastic preservation, thereby overlooking the complex mechanisms by which they fundamentally reconstructed national identity and interethnic power structures amidst the “triple crisis” of territory, sovereignty, and nationality. To address this, the article employs a comprehensive historical analysis to explore how institutional restructuring in administration, military, and ideology catalyzed the transformation from imperial autocracy toward a “responsible government” framework. The research is distinguished by its innovative application of Anthony D. Smith’s theories of “ethnic” versus “civic” nationalism to deconstruct the “myth-symbol complex” of the Chinese nation, bridging the theoretical divide between the “New Qing History” paradigm and empirical modernization narratives. Findings demonstrate that while the Manchu leadership aimed to secure formal primacy, the practical implementation of reforms engendered a de facto Han-supported power structure, compelling the reconceptualization of the state as a “multi-ethnic constitutional monarchy” and establishing the institutional logic for the “Five Races Under One Union” model. Consequently, this study offers significant academic value by redefining the New Policies as the foundational phase of modern China, providing a crucial theoretical framework for understanding the continuity of China’s multi-ethnic statehood and national identity beyond the dynastic collapse. Full article

The artistic exchange during Buddhism’s early transmission represents a vital field within Silk Road art studies. When Buddhist art first entered China during the Eastern Han Dynasty (25–220), many artistic elements originating from Indian and Central Asian traditions manifested via a highly fragmentary mode of dissemination. As a result, prior scholarship on Buddhist art in the Han Dynasty has predominantly focused on case studies of individual motifs such as Buddha images, lotus patterns, lions, and elephants. These studies form an essential foundation for the present research. This paper observes that Buddha images from the Han period were not always disseminated as isolated icons but were frequently closely associated with octagonal columns and arches/lintels. Tracing their origins reveals a connection to the “column–arch–Buddha” narrative motif found in the architectural art of Indian and Central Asian Buddhism. This motif extended eastward through the Western Regions (Xiyu 西域, present-day Xinjiang 新疆) and ultimately reached the core territories of the Han Empire, undergoing various transformations—including deconstruction, reassembly, and translation—in the process. Understanding these combinatory modes and their underlying intent is crucial for comprehending the essential nature of the early interaction and fusion between Buddhist art and Han Chinese civilization. Full article

Traditional scholarship on early Chinese political geography has largely privileged textual analysis, often lacking quantifiable baselines for assessing spatial structure. Addressing this gap, this study utilizes the Shang-Zhou period Shandong region as a focal case to propose a replicable GIS framework—incorporating Kernel Density Analysis (KDA) and Voronoi diagrams—grounded in a null-hypothesis approach. Rather than attempting to simulate theoretical territories, these methods are employed to establish a purely geometric baseline for political space. Central to this study’s findings is the quantification of deviations from this geometric ideal. These measurable discrepancies—manifesting as “Voronoi voids” in mountainous zones and “scale violations” by major powers—serve as empirical indicators for interpreting the tangible impacts of topography, power dynamics, and resource allocation, such as the coastal salt fields identified via KDA. Ultimately, this study demonstrates that this deviation analysis framework functions as a vital quantitative complement to traditional institutional history, effectively elucidating the spatial logic and dynamic evolution of ancient political systems. Full article

Optimizing resource allocation is crucial for enhancing Total Factor Productivity (TFP). This study investigates the impact of differentiated industrial land supply (DILS) on industrial Total Factor Productivity (ITFP), a topic essential for optimizing territorial spatial layouts and promoting high-quality industrial development. Using panel data from 282 Chinese cities (2007–2021) and a Spatial Durbin Model (SDM), we analyze the spatiotemporal effects of this factor. The results indicate a weakening trend in DILS over time, with a spatial pattern of lower intensity in the east and higher intensity in the west, while ITFP shows an upward trend, with higher levels in the east. Nationally, increased DILS impedes ITFP growth, a finding with robust implications for alternative approaches. This impact demonstrates significant spatiotemporal heterogeneity: at the macro-scale, eastern China shows an inverted U-shape, while the central and western regions exhibit negative impacts. At the meso-scale, the Yangtze River Economic Belt shows negative effects, while the Yellow River Basin displays an inverted U-shape. At the micro-scale, major city clusters show varied relationships (inverted U-shaped, positive, or negative). We conclude that DILS generally hinders ITFP, with effects intensifying and varying significantly across narrowing spatial scales, underscoring the need for region-specific land policies to support high-quality industrial development. This study enriches our theoretical understanding of how resource allocation affects ITFP and provides practical guidance for optimizing industrial land use. Full article

A systematic assessment of the impact and mechanisms of Land Consolidation policy on ecological environment can provide valuable insights for optimizing territorial spatial development and restoring ecological functions, both in China and globally. Utilizing 2015–2022 township-level panel data from Zhejiang Province, this study employs satellite remote sensing to construct an Ecological Vulnerability (EV) index. We empirically examine the impact of Whole Region Comprehensive Land Consolidation (WRCLC) on EV and its transmission channels by applying a multi-period Difference-in-Differences (DID) model and a mediating effect model. The results indicate that the implementation of WRCLC pilot policies significantly reduces EV, a finding that remains robust after parallel trend tests, placebo tests, and other robustness checks. The mediating effects within the “Element-Pattern-Effect” framework indicate that the transition of land elements toward ecological functions and the absence of significant land use conflicts at the pattern level are key mechanisms driving these outcomes. Furthermore, the study reveals that WRCLC exerts a significant negative spatial spillover effect on adjacent areas. It is therefore recommended to promote this policy, providing valuable insights for land consolidation initiatives in other Chinese provinces and developing countries worldwide. Full article

Representatives of the family Moinidae (Crustacea: Cladocera) are well-adapted to life in temporary waters. Different species are characteristic of the Arid Belt of Eurasia. We aimed to compare the moinid species composition and genetic diversity found in Djibouti (with extreme and uniform environments) with neighboring Ethiopia (a relatively large country with diverse environmental conditions). Any cladocerans were found in only four localities in Djibouti from Ecoregion 527 (Western Red Sea Drainages) according to Abell et al. (2008). The moinids belonged to two taxa: M. cf. micrura and M. heilongjiangensis. In Ethiopia, moinids were found in 28 water bodies from four other Ecoregions (522, 525, 526 and 528). They belonged to M. micrura and M. belli. A genetic study based on full mitogenomes, sequences of the mitochondrial COI and nuclear ITS1 loci demonstrated that M. micrura from Djibouti and Ethiopia belong to distant lineages. Our genetic analysis revealed a very contrasting moinid fauna in two neighboring countries of the African Horn: there was no single haplotype, clade or even species sharing these territories. We have revealed unexpectedly small genetic distances between Chinese (type locality) and Djiboutian populations of M. heilongjiangensis; the question of the invasive status of the latter could therefore be raised. Moreover, the status of M. micrura populations from the Rift Valley also needs to be checked; they could be non-indigenous, as they belong to “European” M. micrura s. str. Finally, we have demonstrated that M. cf. micrura is not a monophyletic clade. Full article

This study reexamines Learner Englishes (LEs)–New Englishes (NEs) continuum by considering intervarietal variation, mode differences, and multiple linguistic levels. Relying on comparable written and spoken corpus data, we investigate the valency patterns and senses of the verb TAKE across two LEs (Mainland Chinese English (MCE) and Belgian French-speaking English (BFE)) and two NEs (Singapore English (SgE) and Hong Kong English (HKE)) within the Extra- and Intra-territorial Forces (EIF) Model. The study examines whether internal linguistic factors, namely, mode (writing and speech) and linguistic levels (valency patterns and senses), influence the variety positioning along the LEs-NEs continuum and whether this positioning reflects the expected proximity cline to native English (NativeE) (BFE > MCE > HKE > SgE) established within the EIF Model. Our quantitative results reveal that individual varieties intermingle depending on mode and linguistic levels rather than occupying stable positions along the LEs-NEs continuum. Dendrogram analyses yield distinct variety clustering patterns that contradict the expected proximity cline to NativeE. Qualitatively, we identify some shared linguistic features across LEs and NEs that suggest common underlying language learning strategies. These results contribute to variationist linguistics by demonstrating that English varieties exhibit dynamic development trajectories shaped by language-internal factors (e.g., mode and linguistic levels). We propose refining the EIF Model to incorporate language-internal dimensions, thereby bridging the gap between LEs and NEs through a more nuanced theoretical framework. Full article

Marine-derived species of the genus Alternaria are widely distributed across diverse aquatic habitats, functioning as pathogens, endophytes, and saprophytes. These fungi are notable for their ability to produce structurally diverse secondary metabolites with potent bioactivities. Between 2003 and 2023, a total of 67 marine-derived Alternaria species were reported and investigated, collectively yielding 319 compounds. Most of these fungal isolates were from Chinese marine territories (53 species; ~79%), followed by isolates from Korea, Japan, India, Egypt, Saudi Arabia, and oceanic regions such as the Atlantic and Pacific. The fungal isolates were mainly obtained from marine plants (26 isolates) and marine animals (23 isolates), with additional sources including sediments (13) and seawater (3). Among the metabolites investigated in different screens, approximately 56% demonstrated measurable bioactivities, with anti-inflammatory (51 active compounds), antimicrobial (41 compounds), cytotoxic (39 compounds), and phytotoxic (52 compounds) activities being the most frequently reported. Additionally, compounds with antiparasitic, antidiabetic and antioxidant effects are reported. The chemical diversity of Alernaria-derived compounds spans multiple structural groups, including nitrogenous compounds, steroids, terpenoids, pyranones, quinones, and phenolics. Notably, compounds such as alternariol, alternariol monomethyl ether, and alternariol-9-methyl ether exhibit broad pharmacological potential, including antibacterial, antifungal, antiviral, immunomodulatory, and anticancer effects. Several metabolites also modulate cytokine production (e.g., IL-10, TNF-α), underscoring their relevance as immunomodulatory agents. Taken together, marine-derived Alternaria compounds represent a prolific and underexplored source of structurally and biologically diverse secondary metabolites with potential applications in drug discovery, agriculture, and biotechnology. This review provides an updated and comprehensive overview of the chemical and biological diversity of Alternaria metabolites reported over the past two decades, emphasizing their biomedical relevance and potential to inspire further research into their ecological functions, biosynthetic mechanisms, and industrial applications. Full article

Environmental innovation represents a pivotal pathway toward achieving energy efficiency improvements, carbon footprint reduction, and ecological sustainability enhancement. The research investigates Chinese manufacturing enterprises listed on domestic stock exchanges throughout 2011–2023. The analytical framework utilizes count-based regression methodologies to explore how R&D investment intensity influences eco-innovation capabilities. Results demonstrate curvilinear associations linking R&D expenditure levels with both substantive and strategic environmental innovation achievements across industrial firms. This outcome successfully passed the turning-point test. Environmental oversight and financial incentives produce divergent moderating influences on innovation trajectories. Regulatory frameworks generate restrictive impacts through narrowing optimal investment ranges and dampening peak innovation outputs, whereas fiscal support mechanisms foster expansive effects via broadening resource availability and amplifying achievement levels. Cross-sectional examination uncovers substantial variations among ownership categories and geographical locations. State-owned enterprises demonstrate significantly lower optimal R&D intensity thresholds. Private firms require substantially elevated thresholds for optimal performance. Inland territories manifest unbalanced innovation dynamics. Coastal areas exhibit symmetric innovation patterns. The research enriches empirical knowledge in eco-innovation studies while offering context-specific strategic insights. The findings establish theoretical foundations and practical guidance for policy architects designing integrated environmental management systems that enhance innovation capabilities. Full article

Research on watershed ecological protection and restoration within the framework of territorial spatial planning serves as a critical approach to ensuring national ecological security and plays a vital role in enhancing ecosystem stability. In recent years, scholarly interest in this topic has grown significantly. However, development trends and optimization strategies remain unclear, especially regarding comparative insights between Chinese and English research articles within the territorial spatial planning paradigm. A comprehensive review is therefore needed to bridge this gap. This study utilizes bibliometric analysis with CiteSpace, based on publications from the Web of Science (WOS) and China National Knowledge Infrastructure (CNKI) databases, to visualize and compare Chinese and English research articles on watershed ecological protection and restoration. By combining quantitative and qualitative approaches, this study identified research hotspots and trajectories and provided directions for future research. The main findings are as follows: (1) A quantitative analysis indicates that the number of publications has increased significantly since 1998, with growing interdisciplinary and cross-sector collaboration. (2) The qualitative analysis reveals three fundamental theoretical principles: holistic management, multi-scale interactions, and dynamic coordination. (3) The Chinese Academy of Sciences led in research output, while other institutions showed wider geographic coverage, stronger collaboration networks, and a decentralized, multi-core structure. (4) Keyword clustering highlights three major themes: evaluation methodologies for ecological protection and restoration, spatiotemporal evolution and driving mechanisms, and integrated governance system development. (5) Within the territorial spatial planning paradigm, future researchers should employ big data analytics and monitoring technologies to better diagnose and address ecological challenges. Full article