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"SUPPLY EFFICIENCY"
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Impact of Data Element Utilization Level on Enterprises' Supply Chain Discourse Power
[Purpose/Significance] In the digital age, data elements have become a key factor in production, while insufficient bargaining power in the supply chain poses significant operational risks to enterprises. How to leverage the opportunities of the digital economy, maximize the role of data elements, and avoid operational risks caused by insufficient discourse power in the supply chain has become a key issue that enterprises urgently need to address. Investigating how data utilization enhances this power is vital for building resilient supply chains and informing governance decisions. This method is also effective for further utilizing data elements. It provides micro evidence that helps us understand how data elements can optimize resource allocation and empower organizational decision making. [Method/Process] This study employs a rigorous, empirical approach using panel data from China's A-share listed companies from 2003 to 2022. A two-way fixed effects model serves as the primary estimator to control for uno
Journal Article
Energy Efficiency Optimization of Collaborative Power Supply System with Supercapacitor Storages
To solve the challenge of low efficiency and high operation cost caused by intermittent high-power charging in an energy storage tram, this work presents a collaborative power supply system with supercapacitor energy storage. The scheme can reduce the peak power of the transformer, therefore reducing the grid-side capacity and improving the efficiency. However, there is a lack of quantitative analysis on the performance improvement of the solution. The energy efficiency models of critical components are proposed to evaluate the efficiency of the system, and energy efficiency optimization is conducted. Taking an operational tram line as an example, the improved charging efficiency and reduced operating costs are derived. Further, the ground energy storage capacity is designed and implemented. The measured data demonstrates that the energy efficiency of the optimized charging system is improved, which proves its effectiveness and practicability.
Journal Article
Hemocompatibility Evaluation of PEGylated Bovine Hemoglobin
Hemocompatibility is critical for intravenous hemoglobin-based oxygen carriers (HBOCs). We evaluated the hemocompatibility of polyethylene glycol-conjugated bovine hemoglobin (PEG-bHb) to facilitate its optimization and clinical translation. PEG-bHb was synthesized and characterized. In vitro hemocompatibility was assessed by incubating blood components with PEG-bHb (2.5–40 mg/mL), evaluating erythrocyte morphology/function, coagulation, complement activation, and leu kocyte phagocytosis. In vivo assessments in Wistar rats injecting PEG-bHb (50–100 mg/kg) included erythrocyte function, coagulation, complement activation, and histopathology. PEG-bHb exhibited increased hydrodynamic diameter, unaltered zeta potential, elevated colloidal osmotic pressure (COP) and viscosity, alongside a decreased P50 versus bovine hemoglobin (bHb). In vitro, PEG-bHb preserved erythrocyte morphology without inducing eryptosis, and oxygen supply efficiency was unaffected. Moreover, it slightly disrupted the activated partial thromboplastin time (APTT), the thrombin time (TT), and the platelet adhesion, while platelet activation and thromboelastography (TEG) remained unchanged. PEG-bHb did not activate complement and only mildly enhanced phagocytosis at 2.5 mg/mL. In vivo, PEG-bHb did not affect eryptosis, oxygen supply efficiency, coagulation, complement activation, and no inflammatory infiltration was observed. PEG-bHb maintains erythrocyte morphology and function, slightly perturb coagulation without compromising immunocompatibility, and demonstrated excellent hemocompatibility.
Journal Article
Influence mechanism of digital economy development on the supply efficiency of ecological products
Improving the supply efficiency of ecological products (EPSE) is of great significance to protect the ecological environment, promote the development of green industry and the sustainable growth of the economy. This paper focuses on constructing an evaluation index system for EPSE and exploring the relationship between the development level of the digital economy (DE) and EPSE in China. To measure the EPSE, the study employs the Undesirable Slacks-Based Measurement (SBM) Model across 30 provinces, cities and districts in China from 2011 to 2022. Furthermore, the research utilizes spatial econometric models, panel threshold effect models, and other methodologies to investigate the impact mechanism and non-linear relationship between DE and EPSE. The research shows that: (1) The overall level of EPSE in the study area is relatively low, with significant development differences observed; (2) The DE has a nota-ble spatial spillover effect on EPSE, with a significantly negative impact in neighboring areas; (3) The development of the DE promotes EPSE through the upgrading of human capital structure, industrial structure, and increases in local government fiscal revenue and corporate operating profits; (4) Heterogeneity analysis shows that the impact of DE on EPSE varies significantly across eastern, central, and western China, with positive effects pronounced in the eastern and western regions; (5) Regression results of the threshold effect indicate a significant single threshold effect on the impact of DE development level on EPSE. Specifically, when the threshold value is less than 0.1232, DE significantly contributes to the improvement of EPSE. This paper contributes new literature evidence and factual references to the understanding of the causal relationship between DE and EPSE. The findings highlight the importance of considering spatial spillover effects, impact mechanisms, and regional heterogeneity in analyzing the relationship between DE and EPSE. The research also suggests that promoting the development of the digital economy could be a viable strategy to enhance EPSE, especially in regions where the threshold value is below 0.1232
Journal Article
Simulated Oxygen Supply Efficiency Assessment to Represent Stored Red Blood Cells Quality
Hemolysis rate is usually used as the acceptance criterion for stored red blood cells (RBCs) in clinical practice. However, there is a current lack of parameters for the characterization of hemoglobin quality. This study aimed to incorporate oxygen affinity, cooperativity, and the Bohr effect into a parameter system to monitor oxygen supply efficiency in stored RBCs, potentially serving as a basis for quality assessment. Han Chinese blood from plains, Tibetan blood from plateau, bovine hemoglobin (bHb), and a dextran–bovine hemoglobin conjugate (Dex20-bHb) were analyzed using the BLOODOX-2018. Oxygen affinity (P50) was determined by oxygen dissociation curves (ODCs) at pH = 7.4. Cooperativity was assessed through the Hill coefficient, calculated from the fitting range of the Hill equation. The Bohr effect was evaluated by the acid-base sensitivity index (SI) under simulated pH conditions of the lungs (pH = 7.6) and tissues (pH = 7.2) to calculate corresponding P50 values. Oxygen partial pressures (PO2) simulating lungs (PO2 = 100 mmHg for plains and 60 mmHg for plateau) and tissues (PO2 = 40 mmHg for plains and 30 mmHg for plateau) were used to calculate theoretical oxygen-release capacities in both environments. Multiple regression analysis explored relationships among parameters, constructing a system to assess changes in rat RBCs during storage. Optimized test methods determined P50, Hill coefficient, SI, and theoretical oxygen-release capacities for Han Chinese blood, Tibetan blood, bHb, and Dex20-bHb samples in various environments. We constructed a parameter system to characterize blood’s oxygen supply efficiency, revealing the significant influence of the Bohr effect. This influence varied with environmental changes in oxygen affinity. We validated the system using stored rat RBCs, finding consistent P50 trends with predictions, and initial increases in Hill coefficient and SI followed by decreases. Theoretical oxygen-release capacities varied significantly between plateau and plain environments. These results support using oxygen supply efficiency to assess RBC storage quality for developing transfusion strategies. P50, Hill coefficient, SI, and theoretical oxygen-release capacity in different environments can be incorporated into blood oxygen supply efficiency characterization systems to assess the quality changes in RBCs during storage.
Journal Article
Unveiling the Impact of Digitalization on Supply Chain Performance in the Post-COVID-19 Era: The Mediating Role of Supply Chain Integration and Efficiency
In the context of the rapidly evolving landscape shaped by the increased prevalence of digital technologies and the transformative dynamics of supply chains in the post-COVID-19 era, this research seeks to address a crucial gap by examining the mediating role played by supply chain integration and efficiency. The primary aim is to provide a more comprehensive and nuanced understanding of how digitalization influences networks of supply chain performance. Moreover, we delve into the moderating impact of supply chain dynamism on shaping this association. Through a simple random sampling technique, survey data were collected from 293 Turkish manufacturing firms via an online survey and analyzed using structural equation modeling. The findings underscore that digitalization significantly enhances supply chain integration and efficiency, thereby contributing to improved supply chain performance. Notably, supply chain integration and efficiency were identified as key mediators in the relationship between digitalization and supply chain performance. Furthermore, we investigate the moderating effect of supply chain dynamism, revealing its positive influence on the association between digitalization and supply chain integration. Rooted in key theories such as the resource-based view and dynamic capabilities, this study provides valuable insights by unraveling the intricate processes through which digitalization’s impact is channeled in the post-COVID-19 era. The research extends the current literature by considering the contextual role of supply chain dynamism, shedding light on the complex dynamics between digitalization and supply chain outcomes.
Journal Article
Assessment and Enhancement of Ecosystem Service Supply Efficiency Based on Production Possibility Frontier: A Case Study of the Loess Plateau in Northern Shaanxi
Enhancing the supply efficiency of ecosystem services plays a central role in improving both natural ecosystems and human well-being. Taking the Loess Plateau of Northern Shaanxi as an example, this study utilizes InVEST to assess the ecosystem services of water yield and habitat quality. The optimal solutions for the combination of these two services are calculated on the basis of the Pareto principle. The production possibility frontier curves for the two services are fitted, and the services’ supply efficiency is measured. Furthermore, this study employs ordinary least squares and geographically weighted regression to analyze the dominant factors affecting supply efficiency. The results comprise the following findings: (1) There are eighteen solutions representing the optimal combinations between the two services. (2) The supply efficiency of the two services increases from northwest to southeast in spatial distribution. (3) The dominant factors vary among different zones of supply efficiency. Population, hydrology, and gross domestic product (GDP) are the dominant factors in the general-efficiency, sub-low-efficiency, and low-efficiency supply zones, respectively. Hydrology, NDVI, and GDP are the dominant factors in the sub-high-efficiency supply zone, while GDP, terrain, and population are the dominant factors in the high-efficiency supply zone. In conclusion, this paper proposes recommendations for reducing trade-offs and enhancing supply efficiency between ecosystem services. These include dynamic supervising for the high-efficiency supply zone, moderate greening in the sub-high-efficiency supply zone, stabilizing the population in the general-efficiency supply zone, and reducing development intensity in low- and sub-low-efficiency zones. The study reveals the potential and approaches for improving the supply of ecosystem services and offers guidance for formulating ecological protection plans.
Journal Article