Science Progress最新文献_第7页

Assessing the ecological environment quality response to land-use changes in arid zones: A case study of Linhe District, Inner Mongolia. 干旱区土地利用变化对生态环境质量的响应——以内蒙古临河区为例

IF 2.9 4区综合性期刊

Science Progress Pub Date : 2025-07-01 Epub Date: 2025-07-29 DOI: 10.1177/00368504251357843

Yu-Ting Zhao, Zhang Yu-Feng, Liu Huyuan

{"title":"Assessing the ecological environment quality response to land-use changes in arid zones: A case study of Linhe District, Inner Mongolia.","authors":"Yu-Ting Zhao, Zhang Yu-Feng, Liu Huyuan","doi":"10.1177/00368504251357843","DOIUrl":"10.1177/00368504251357843","url":null,"abstract":"Objective: Linhe District, within the Yellow River metropolitan area, faces ecological issues like arable land salinization and desertification. A swift and scientific analysis of the distribution and changes in the ecological environment quality of this area will aid Linhe District in rehabilitating saline-alkaline cultivated land and achieving comprehensive protection of the Yellow River-related ecological environment. Methods: This study utilized land four Landsat TM/OLI images (2005-2020) to develop a remote-sensing eco-index through principal component analysis of greenness, humidity, dryness, and temperature. The eco-index was overlaid with land-use change data to assess ecological responses to recent changes in Linhe District. Results: Results showed that the land-use structure has remained relatively stable over the past 15 years, with cultivated land having the highest eco-index value and unused land the lowest. Conclusions: The ecological index to rise from 0.5087 to 0.6837, indicating improved ecological quality in 64.96 km² due to land-use changes like conversions between cropland and grassland, urban and rural residential land to cropland, and forest land. Conversely, ecological degradation occurred over 161.89 km², primarily due to conversions from arable land to grassland and from arable land and grassland to urban and rural residential land.","PeriodicalId":56061,"journal":{"name":"Science Progress","volume":"108 3","pages":"368504251357843"},"PeriodicalIF":2.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12314227/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144735619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of piezoelectric properties of NBT-based ceramics based on deep neural networks. 基于深度神经网络的nbt基陶瓷压电性能预测。

IF 2.6 4区综合性期刊

Science Progress Pub Date : 2025-07-01 Epub Date: 2025-07-17 DOI: 10.1177/00368504251359081

Xin Zhang, Yalong Liang, Jiachen Wang, Pan Chen, Pei Li

{"title":"Prediction of piezoelectric properties of NBT-based ceramics based on deep neural networks.","authors":"Xin Zhang, Yalong Liang, Jiachen Wang, Pan Chen, Pei Li","doi":"10.1177/00368504251359081","DOIUrl":"10.1177/00368504251359081","url":null,"abstract":"In recent years, the rapid advancement of materials science has underscored the significance and complexity of understanding and optimizing the properties of piezoelectric materials. Traditional analytical methods have encountered difficulties in addressing the challenges posed by variable material compositions and intricate processing conditions. However, deep neural networks (DNNs) present new opportunities in this field due to their robust capabilities in nonlinear data processing and pattern recognition. This study employs DNN to model the relationship between the composition and processing conditions of piezoelectric materials and their electrical properties. Through quenching experiments, it was observed that the electrical properties of Na0.5Bi0.5TiO3-based ceramics are positively correlated with local polar heterogeneity. This phenomenon was further validated by manipulating the local polar heterogeneity through Bi or Sr nonstoichiometric modifications. Subsequently, a DNN model characterized by local polarity heterogeneity was developed. After training on extensive high-quality experimental data, the DNN model demonstrated exceptional prediction accuracy and effectively elucidated the underlying complex mechanisms governing material properties. The findings indicate that DNN can accelerate the development and optimization of new piezoelectric materials, provide guidance for experimental design, and significantly enhance research and development efficiency. The successful application of this research strongly supports the expansion of deep learning technology in materials science.","PeriodicalId":56061,"journal":{"name":"Science Progress","volume":"108 3","pages":"368504251359081"},"PeriodicalIF":2.6,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12276500/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144651234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Digital image encryption utilizing high-dimensional cellular neural networks and lower-upper triangular decomposition of matrix. 利用高维细胞神经网络和上下三角矩阵分解的数字图像加密。

IF 2.9 4区综合性期刊

Science Progress Pub Date : 2025-07-01 Epub Date: 2025-09-09 DOI: 10.1177/00368504251375171

Limin Tao, Xikun Liang, Lidong Han, Bin Hu

{"title":"Digital image encryption utilizing high-dimensional cellular neural networks and lower-upper triangular decomposition of matrix.","authors":"Limin Tao, Xikun Liang, Lidong Han, Bin Hu","doi":"10.1177/00368504251375171","DOIUrl":"10.1177/00368504251375171","url":null,"abstract":"At present, significant progress has been made in the research of image encryption, but there are still some issues that need to be explored in key space, password generation and security verification, encryption schemes, and other aspects. Aiming at this, a digital image encryption algorithm was developed in this paper. This algorithm integrates six-dimensional cellular neural network with generalized chaos to generate pseudo-random numbers to generate the plaintext-related ciphers. The initial image matrix is transformed into L-matrix and U-matrix through Lower-Upper decomposition. These matrices are then encrypted simultaneously with distinct cipher sequences. The algorithm's feasibility and security are demonstrated through comprehensive encryption simulations and performance analysis. The paper's contributions include i) the cellular neural network and an innovative chaos approach to develop a new ciphers scheme; ii) the image decomposition encryption effectively shorten the cipher length and reduce interception risks during transmission; iii) the frequent application of nonlinear transforms enhances the structural complexity of the cryptosystem and fortifies the security of the algorithm. Compared to existing algorithms, the paper achieves a novel image decomposition encryption mode with comprehensive advantages. This mode is expected to be applied in image communication security.","PeriodicalId":56061,"journal":{"name":"Science Progress","volume":"108 3","pages":"368504251375171"},"PeriodicalIF":2.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12421057/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145031357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of Digital Supply Chain Finance to alleviate SMEs financing constraints: Evidence from SRDI enterprises in China. 数字供应链金融对缓解中小企业融资约束的影响：来自中国SRDI企业的证据

IF 2.9 4区综合性期刊

Science Progress Pub Date : 2025-07-01 Epub Date: 2025-09-08 DOI: 10.1177/00368504251375169

Shanshan He, Zhengyang Liu

{"title":"Impact of Digital Supply Chain Finance to alleviate SMEs financing constraints: Evidence from SRDI enterprises in China.","authors":"Shanshan He, Zhengyang Liu","doi":"10.1177/00368504251375169","DOIUrl":"10.1177/00368504251375169","url":null,"abstract":"Objective: To explore the alleviating effect of digital supply chain finance (DSCF) on financing constraints experienced by small- and medium-sized enterprises (SMEs), with a view to promoting the digital transformation of enterprises. Methods: This observational study utilizes data from Chinese listed enterprises. The study's primary focus is on a selection of SRDI (abbreviation for \"specialized, refined, distinctive, and innovative\") enterprises in the electronics and machinery industries from 2013 to 2020. The study measures the level of DSCF in the regions where they are located, aims to empirically examine the role of DSCF in alleviating financing constraints for enterprises. Results: (1) SRDI enterprises in China continue to face persistent financing constraints, characterized by limited access to working capital and restricted credit availability. (2) Empirical analysis demonstrates that DSCF can alleviate these financing constraints. (3) Notably, the mitigation effect exhibits industry-specific heterogeneity between the electronics and manufacturing industries, likely attributable to differences in supply chain complexity and asset tangibility between these sectors. Conclusions: Findings underscore DSCF's critical role in alleviating the financing constraints of SMEs while informing targeted financial ecosystem reforms. We propose enhanced policy interventions: (1) tax incentives and blockchain-enabled data-sharing mechanisms to dismantle information asymmetries and boost DSCF efficiency; and (2) sector-specific solutions addressing electronics' R&D liquidity challenges and machinery's capital-intensive production cycles through optimized DSCF frameworks.","PeriodicalId":56061,"journal":{"name":"Science Progress","volume":"108 3","pages":"368504251375169"},"PeriodicalIF":2.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12417649/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145014464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning-based model to predict von Mises stress and chip reduction coefficient developed during dry turning of EN36C steel. 基于机器学习的EN36C钢干车削过程中von Mises应力和切屑减小系数预测模型。

IF 2.9 4区综合性期刊

Science Progress Pub Date : 2025-07-01 Epub Date: 2025-07-21 DOI: 10.1177/00368504251349973

Vishal Mishra, Nikhil Bharat, Kalyan Chakraborty, Vijay Kumar, Mridusmita Roy Choudhury

{"title":"Machine learning-based model to predict von Mises stress and chip reduction coefficient developed during dry turning of EN36C steel.","authors":"Vishal Mishra, Nikhil Bharat, Kalyan Chakraborty, Vijay Kumar, Mridusmita Roy Choudhury","doi":"10.1177/00368504251349973","DOIUrl":"10.1177/00368504251349973","url":null,"abstract":"This study comprehensively investigates the determination of chip reduction coefficient (CRC) and von Mises stress (VMS) during dry turning of Nickel-Chromium case-hardened steel (EN36C), renowned for its high surface hardness and core toughness. Machining parameters, including cutting speed (36-100 m/min), feed rate (0.49-0.86 mm/rev), and depth of cut (0.67-1.5 mm), were rigorously analyzed using Analysis of Variance (ANOVA) and Artificial Neural Networks. ANOVA identified cutting speed as the most influential factor, accounting for 52.04% of CRC and 35.04% of VMS variations, with feed rate and depth of cut also playing significant roles. ANN modeling achieved a correlation coefficient of 0.97, demonstrating excellent predictive accuracy for parameter optimization. Scanning Electron Microscopy revealed chip morphology, showing continuous chips under optimal conditions of high cutting speed (100 m/min), low feed rate (0.63 mm/rev), and moderate depth of cut (1.0 mm), minimizing stress and enhancing material removal efficiency. Brittle chips were observed at lower speeds (36 m/min) and higher feed rates, emphasizing the critical role of parameter selection. Optimal machining parameters significantly improved surface quality, reduced tool wear, and minimized operational stresses. This research offers a robust framework for machining process optimization, with implications for enhancing industrial efficiency and cost-effectiveness.","PeriodicalId":56061,"journal":{"name":"Science Progress","volume":"108 3","pages":"368504251349973"},"PeriodicalIF":2.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12290256/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144683657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photosynthetic and oxidative stress responses of rice seedlings exposed to benzotriazole. 苯并三唑对水稻幼苗光合和氧化胁迫的影响。

IF 2.9 4区综合性期刊

Science Progress Pub Date : 2025-07-01 Epub Date: 2025-07-23 DOI: 10.1177/00368504251362300

Hong Rong, Chengrun Wang, Zurong Shi, Qianqian Tong, Lijuan Zhao

{"title":"Photosynthetic and oxidative stress responses of rice seedlings exposed to benzotriazole.","authors":"Hong Rong, Chengrun Wang, Zurong Shi, Qianqian Tong, Lijuan Zhao","doi":"10.1177/00368504251362300","DOIUrl":"10.1177/00368504251362300","url":null,"abstract":"Objective: The widespread use of benzotriazole (BTA) has raised concerns about its potential risks to living organisms. However, the toxic effects of BTA on plants remain unclear. Thus, leaves of rice seedlings were employed as the tested materials in the current experiments. The objective was to investigate the toxicological effects of BTA on the photosynthesis and antioxidant systems in rice seedlings. Methods: The rice seedlings at the four-leaf stage were subjected to treatments by adding BTA into the nutrient solutions. The tested concentrations of BTA were set at 0, 1.5, 2.5, 5, and 10 mg/L. Results: The results showed that 1.5 mg/L BTA increased chlorophyll (Chl) content and net photosynthetic rate (Pn), accompanied by upregulation of atpA, atpB, psaB, and psbA genes. In contrast, 5 to 10 mg/L BTA stimulated excessive generation of superoxide anion (O2·-), enhanced the activities of NADPH oxidase, superoxide dismutase (SOD) and catalase (CAT) isozymes, and reduced Chl content, Pn, and stomatal conductance (Gs). Simultaneously, such treatments suppressed the expression of atpB, psbA, and RbcS genes. In addition, compared to the control, the products of 70 kDa heat shock proteins (HSP70) were apparently enhanced with the increase of BTA. Conclusions: This study demonstrated that the effects of BTA on the photosynthesis and antioxidant systems of rice seedlings exhibited a concentration-dependent response, with low concentrations (1.5 mg/L) improving photosynthesis, while high concentrations (5 to 10 mg/L) induced oxidative stress and photosynthetic damage. Furthermore, the activation of SOD and CAT isozymes, along with HSP70 induction, may contribute to mitigating BTA toxicity.","PeriodicalId":56061,"journal":{"name":"Science Progress","volume":"108 3","pages":"368504251362300"},"PeriodicalIF":2.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12301589/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144700393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The treatment outcome of radiation therapy for nasopharyngeal carcinoma in elderly patients: An observational, retrospective, single-center study. 放射治疗鼻咽癌老年患者的疗效：一项观察性、回顾性、单中心研究。

IF 2.9 4区综合性期刊

Science Progress Pub Date : 2025-07-01 Epub Date: 2025-09-01 DOI: 10.1177/00368504251374904

Dang Nguyen Van, Duc Dinh, Hang Nguyen Thi, Nhung Nguyen Thi Thu, Phan Nguyen Huy, Anh Van

{"title":"The treatment outcome of radiation therapy for nasopharyngeal carcinoma in elderly patients: An observational, retrospective, single-center study.","authors":"Dang Nguyen Van, Duc Dinh, Hang Nguyen Thi, Nhung Nguyen Thi Thu, Phan Nguyen Huy, Anh Van","doi":"10.1177/00368504251374904","DOIUrl":"10.1177/00368504251374904","url":null,"abstract":"ObjectiveThis study aimed to assess the treatment success and prognostic variables in elderly patients with nasopharyngeal carcinoma (NPC) who underwent definitive radiation therapy between January 2018 and December 2023.MethodsThe study employed a retrospective design and utilized the database system of our institution, which is centralized in a single location. A total of 125 patients, aged 60 or older, who were diagnosed with undifferentiated carcinoma of the nasopharynx (UCNT) based on histological confirmation, were included in the study. The data collection period spanned from January 2018 to December 2023.Results125 patients (93 male (74.4%), 32 females (25.6%); average age, 65.9 years) were identified, 16.8% were stage I, 34.4% stage II, 32% stage III, 16.8% stage IVA. The median follow-up for all 125 patients at the time of this analysis was 32.97 months (range 0.39-80.64 months). The mean OS was 64.75 ± 2.78 months. The 1-year and 5-year OS for the entire cohort were 93% and 69%, respectively. The mean disease-free survival (DFS) was 61.91 ± 2.87 months with a 5-year rate of 72%. According to multivariate analysis, overall survival was significantly influenced by both clinical stage (P < .05) and the presence of comorbidities. The majority of patients experienced good treatment tolerance, with grade 3 adverse effects including mucositis (6.4%), dermatitis (6.4%), and neutropenia (8.8%).ConclusionsThere has been a rise in the number of older patients, and they exhibit comparable clinical characteristics to the general population. The predicted criteria were clinical stage, age beyond 70, and comorbidities, each considered independently. Utilizing multidisciplinary therapeutic options is crucial for optimizing the chosen treatment for patients.","PeriodicalId":56061,"journal":{"name":"Science Progress","volume":"108 3","pages":"368504251374904"},"PeriodicalIF":2.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12402548/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144979924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Isolated distal deep vein thrombosis: Diagnosis and management. 孤立远端深静脉血栓：诊断和处理。

IF 2.9 4区综合性期刊

Science Progress Pub Date : 2025-07-01 Epub Date: 2025-09-16 DOI: 10.1177/00368504251364934

Yuanyuan Tang, Zan Luo, Xiangming Ye

{"title":"Isolated distal deep vein thrombosis: Diagnosis and management.","authors":"Yuanyuan Tang, Zan Luo, Xiangming Ye","doi":"10.1177/00368504251364934","DOIUrl":"10.1177/00368504251364934","url":null,"abstract":"Isolated distal deep vein thrombosis (IDDVT), a subtype of lower extremity deep vein thrombosis (DVT), is a common yet preventable complication in clinical practice. Based on thrombus location, IDDVT can be categorized into axial venous thrombosis (involving the anterior tibial, posterior tibial, and peroneal veins) and intermuscular venous thrombosis (affecting the venous plexus of the gastrocnemius and soleus muscles). IDDVT is recognized as a potential source of embolic events and is associated with poor prognosis. Current evidence indicates that the Wells score is not applicable for IDDVT diagnosis, which primarily relies on D-dimer testing and lower extremity venous ultrasonography. There remains a lack of standardized treatment protocols for IDDVT. The American College of Chest Physicians (ACCP) guidelines recommend a 3-month anticoagulation regimen for patients with significant symptoms or high risk of thrombus extension, prioritizing direct oral anticoagulants; however, the supporting evidence is of low quality. Significant anatomical and physiological differences exist between axial and intermuscular venous thrombosis. Axial venous thrombosis demonstrates higher rates of thrombus extension, recurrence, and pulmonary embolism compared to intermuscular venous thrombosis. Nevertheless, whether anticoagulation therapy is warranted for both types remains controversial. This narrative review systematically elucidates the epidemiological characteristics, risk factors, clinical manifestations, and clinical management of IDDVT. It focuses on the diagnosis and management of IDDVT based on current guideline recommendations and the latest evidence, with the aim of providing a reference for clinical practitioners.","PeriodicalId":56061,"journal":{"name":"Science Progress","volume":"108 3","pages":"368504251364934"},"PeriodicalIF":2.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12441256/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145076661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Predictive value of Lp(a) for MACE in ACS patients with T2DM following PCI, with achieved LDL-C target: A cross-sectional study. 在达到LDL-C目标的ACS合并T2DM患者PCI术后，Lp(a)对MACE的预测价值：一项横断面研究

IF 2.9 4区综合性期刊

Science Progress Pub Date : 2025-07-01 Epub Date: 2025-08-17 DOI: 10.1177/00368504251369947

Zeyu Jiang, Shimiao Ruan, Qingqing Duan, Wenzhong Zhang, Shuhan Pan

{"title":"Predictive value of Lp(a) for MACE in ACS patients with T2DM following PCI, with achieved LDL-C target: A cross-sectional study.","authors":"Zeyu Jiang, Shimiao Ruan, Qingqing Duan, Wenzhong Zhang, Shuhan Pan","doi":"10.1177/00368504251369947","DOIUrl":"10.1177/00368504251369947","url":null,"abstract":"ObjectiveIt is widely accepted that elevated low-density lipoprotein cholesterol (LDL-C) levels are a major risk factor for coronary heart disease (CHD). However, even patients who have achieved LDL-C levels below the currently recommended targets may still have residual risk. Recently, Lipoprotein(a) [Lp(a)] has attracted significant attention as independent causal risk factor for CHD. Nonetheless, the role of Lp(a) in acute coronary syndrome (ACS) patients with type 2 diabetes mellitus (T2DM) who have undergone percutaneous coronary intervention (PCI) and achieved the LDL-C target (≤1.4 mmol/L) remains unclear.MethodsThis retrospective study enrolled 462 ACS patients with comorbid T2DM who underwent PCI, with a median follow-up duration of 27 months post-procedure. The primary endpoint was major adverse cardiovascular events (MACE), defined as all-cause death, recurrent acute myocardial infarction (AMI), ischemic stroke, or hospitalization due to recurrent angina. Based on MACE occurrences, patients were divided into MACE group and non-MACE group. Furthermore, patients were further divided into three groups according to their Lp(a) levels. Kaplan-Meier and Cox regression analyses were performed.ResultsPatients with MACE had more coronary artery lesions, and the plasma Lp(a) concentrations in the MACE group were significantly higher than in the non-MACE group. The incidence of MACE and recurrent AMI was higher in the Lp(a) ≥ 180 mg/dL group compared to the other two groups. Even after multivariate adjustment, Lp(a) ≥ 180 mg/dL remained closely associated with an increased risk of MACE (HR 2.82, 95% CI: 1.47-5.41, P = .002) and recurrent AMI (HR 3.71, 95% CI: 1.17-11.81, P = .026).ConclusionElevated Lp(a) levels were strongly associated with poor prognosis in ACS patients with T2DM who underwent PCI.","PeriodicalId":56061,"journal":{"name":"Science Progress","volume":"108 3","pages":"368504251369947"},"PeriodicalIF":2.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12361831/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144876965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Maintenance optimization for unavailability enhancement of representative interconnected infrastructure based on minimum cost. 基于最小成本的代表性互联基础设施不可用性增强的维护优化。

IF 2.9 4区综合性期刊

Science Progress Pub Date : 2025-07-01 Epub Date: 2025-08-06 DOI: 10.1177/00368504251366357

Radim Briš, Pavel Praks, Radek Fujdiak, Matěj Vrtal, Dejan Brkić

{"title":"Maintenance optimization for unavailability enhancement of representative interconnected infrastructure based on minimum cost.","authors":"Radim Briš, Pavel Praks, Radek Fujdiak, Matěj Vrtal, Dejan Brkić","doi":"10.1177/00368504251366357","DOIUrl":"10.1177/00368504251366357","url":null,"abstract":"This paper explores the feasibility of solving a maintenance optimization problem in an interconnected smart grid system, comprising a power grid and a communication network, to reduce system unavailability. The unavailability, which must be in practice under the control of a system operator, is particularly sensitive to critical components in the power grid that must be under preventive maintenance (PM). The main goal is to find an optimal setup of PM within the specified mission time, minimizing system operation costs and reducing time-dependent unavailability. The method for unavailability quantification was remade to include different stochastic models for the unavailability calculation of system components working in different maintenance modes. A cost model is suggested to estimate the cost of various maintenance configurations. By applying these methodological tools designed to benefit users of any complex system, an optimal PM policy was developed for the selected smart grid. This policy reduces grid unavailability by approximately 20% and lowers costs by about 8.5% compared to a configuration without maintenance.","PeriodicalId":56061,"journal":{"name":"Science Progress","volume":"108 3","pages":"368504251366357"},"PeriodicalIF":2.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12508534/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144796249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0