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Error Analysis and Teaching Suggestions for Corpus-Based Teaching of Disyllabic Homophones in Teaching Chinese to Speakers of Other Languages
Get PDFDisyllabic homophones are the key and difficult points in the teaching of Chinese as a foreign language. Based on the theory of second language acquisition and interlanguage theory, this paper systematically combs the types of errors in the use of Chinese disyllabic homophones by foreign students based on the analysis of HSK dynamic composition corpus and foreign students ' daily homework, oral recording and other corpora. The study found that the errors are mainly manifested in the confused use of homonyms, the wrong use of homonyms and the misuse of homonyms caused by the negative transfer of mother tongue. In-depth analysis shows that these errors are closely related to the complexity of Chinese homonyms, the mother tongue background of foreign students, improper learning strategies, and the lack of teaching materials and teaching methods. Based on this, this paper puts forward targeted teaching countermeasures, in order to provide reference for vocabulary teaching of Chinese as a foreign language
Research on the Cross-cultural Adaptation of the Signage System in Macao's Historical Districts to Multiple Groups
Get PDFThe historical district wayfinding system in Macau, as a carrier of the integration of Chinese and Portuguese cultures, faces perceptual differences and functional demand conflicts among three groups: residents, tourists and students. The study, based on 231 mixed questionnaires (including open-ended questions) and field research, focused on the front of the Legislative Assembly (the core tourist area), the Red Market and the Sa Lai Tou district (the residential area), quantitatively analyzed the visual sensitivity, emotional acceptance and functional requirements of the three groups towards Portuguese elements. The study found that the frequency of cultural exposure drove the three groups to show stratified characteristics of "identity-oriented - experience-oriented - cognition-oriented". Based on the integrated data, an optimized strategy of symbolic function adaptation, emotional stratified response, and cultural progressive interpretation was proposed, and scenario-based solutions were designed for the two typical blocks to provide theoretical references for the design of wayfinding systems in multicultural cities
Optimisation of Spraying Parameters for Boom Sprayers
Get PDFIn order to investigate the influence of factors on the spray deposition of the spray bar sprayer, using the designed mobile spray bar spray device, the spray height, spray bar travelling speed and spray pressure were selected as the test factors, and the deposition amount of seductive red per unit blade area Y1 and the deposition coefficient of variation Y2 were taken as the evaluation indexes for the test, and the 3-factor, 3-level orthogonal rotary spray deposition test was carried out. The Box-Behnken response surface method was used to analyse and obtain the mathematical model of the spray deposition characteristics of spray height H, spray rod travel speed v and spray pressure P. The influence of each factor on the spray deposition characteristics and the optimal working parameters of the spray machine were obtained according to the regression analysis results. The results show that the forward speed, working height and spray pressure have a significant effect on the spray deposition characteristics, and the degree of influence in the order of the factors from the largest to the smallest is the spray pressure, the working height, the forward speed, the spray pressure, the working height and the spray pressure. The mean value of droplet deposition per unit area is negatively correlated with forward speed and nozzle working height, and positively correlated with spray pressure. The coefficient of variation of deposition is negatively correlated with the spray pressure, positively correlated with the forward speed, and decreases and then increases with the increase of the working height, which indicates that in the case of a certain working height, increasing the spray pressure or reducing the forward speed can effectively improve the uniformity of droplet deposition of the sprayer
A Design of Bionic Gripper to Enhance the Persistence of Wild Life Monitoring Performed by Drone
Get PDFIn recent day, drones has become an essential tools in environmental observation and wildlife animal monitoring. It is undeniable that the effectiveness of this tool is often limited by challenges in landing and energy efficiency, particularly in dense forest environments. To address this potential problems, this study proposes a bionic gripper which is inspired by bird talons for enhancing drone landing capabilities, enabling a stable landing on complex environments for example tree branches. The gripper features a self-locking mechanism, which highly reduces the energy consumption while maintaining a stable and reliable holding. Using SolidWorks and Fusion 360, the gripper was designed and stimulated for a lightweight and adaptive performance. A key application of this technology is in the conservation for endangered species such as crested-ibis. This system is allowing drones to conduct long-term, low-disturbance observation, which not only extends the operation time but also minimizes the interference from noises, that contributes to a more sustainable and effective wildlife research as well as environmental monitoring
Optimizing Logcumsumexp on Cambricon MLU: Architecture-Aware Scheduling and Memory Management
Get PDFThe Logcumsumexp algorithm is a core method for numerically stable cumulative summation in logarithmic space, especially suitable for scenarios involving extremely small or large numerical computations. By applying logarithmic transformation, this algorithm effectively addresses the common issues of underflow and overflow in probability calculations, deep learning, and statistical modeling, making it an important high-performance computing algorithm. In recent years, China's chip industry has been continuously rising, and the domestic MLU computing platform from Cambricon Technologies has provided new options for global users. Based on the Cambricon MLU computing platform and in combination with its hardware structure, this paper constructs a set of Logcumsumexp algorithm named MLULCSE, which can perform Logcumsumexp operations on tensors of any dimension along the specified dimension and has been optimized for different types of Logcumsumexp tasks. By categorizing tasks into four types and implementing different strategies tailored to the hardware architecture, we achieved efficient logcumsumexp computation. This work enables efficient probabilistic computing on domestic AI accelerators, experimental results show that MLULCSE running on MLU 370-X4 has a hardware time that is controlled within 7 times compared to Pytorch Logcumsumexp running on Tesla V100, and in some cases, it even reaches 0.42 times
Retinal Vessel Segmentation Based on Feature Fusion and Spatially Constrained Co-Clustering
Get PDFRetinal vessel segmentation plays a critical role in the early diagnosis of ocular and systemic diseases such as diabetic retinopathy and hypertension. This paper proposes an unsupervised segmentation method that integrates dual-feature fusion and spatially constrained co-clustering. The approach combines multi-scale and multi-directional vascular structural information captured by B-COSFIRE filters with local contrast enhancement from the Top-hat transformation, resulting in a complementary feature representation. Furthermore, a spatial constraint based on Markov Random Fields is incorporated into an information-theoretic co-clustering framework to improve topological consistency. Experimental results on the STARE database demonstrate that the proposed method achieves competitive performance, with an accuracy of 0.9511, sensitivity of 0.7439, and specificity of 0.9747, effectively enhancing vascular continuity and robustness
The Application Value of CRRT in the Treatment of Cardio-Renal Syndrome: A Meta Analysis
Get PDFObjective: To evaluate the therapeutic effect of continuous renal replacement therapy (CRRT) combined with drug therapy and drug therapy alone on cardiorenal syndrome (CRS) by statistically comparing the efficacy of CRRT in the clinical treatment of CRS.
Method: Chinese databases (China National Knowledge Infrastructure, VIP Database, Wanfang Database) and English databases (PubMed, EmBase, The Cochrane Library, Web of Science) were searched for literature on continuous renal replacement therapy (CRRT) and the application of conventional drugs in cardiorenal syndrome (CRS) using computers. The search period was from the establishment of each database to September 1, 2023. By reading and screening the title, abstract, and full text, 10 articles that meet the inclusion criteria were finally included. Excel was used to summarize and integrate the data, and RevMan5.3 software was used for outcome indicator analysis.
Result: A total of 10 articles were included. Including 741 patients, including 369 patients in the continuous renal replacement therapy (CRRT) combined with drug treatment group and 372 patients in the internal medicine drug treatment group. 1. Cr: The decrease in CRRT group was higher than that in the internal medicine drug treatment group[MD=-58.73, 95%CI(-108.77, -8.69),P=0.02], (I²=98%, P＜0.00001); 2. LVEF: The recovery of the CRRT group was better than that of the internal medicine drug treatment group [MD=5.93,95%CI(3.21, 8.65),P＜0.0001],(I²=85%,P＜0.00001); 3. BUN: The CRRT group showed better reduction than the internal medicine drug treatment group[MD=-1.21, 95%CI(-1.75, -0.67), P＜0.0001], (I²=93%, P＜0.00001); 4. UA: The decrease in CRRT group was higher than that in the internal medicine drug treatment group[MD=-95.05, 95%CI(-156.94, -33.16), P=0.003], (I²=80%, P=0.002); 5. BNP: The reduction effect of CRRT group is better than that of internal medicine drug treatment group[MD=-474.92, 95%CI(-636.76, -313.09), P＜0.00001], (I²=91%,P＜0.00001); 6. LVD: The CRRT group showed better reduction than the internal medicine drug treatment group[MD=-3.97, 95%CI(-6.75, -1.19), P=0.005], (I²=0%, P=0.002); 7. Urine output: The CRRT group showed better recovery than the internal medicine drug treatment group[MD=87.91, 95%CI(38.09, 137.73), P=0.0005], (I²=84%, P=0.002); 8. Classification of cardiac function: The downgrading effect of the CRRT group is better than that of the internal medicine drug treatment group[MD=-1.10, 95%CI(-1.43, -0.78), P＜0.00001], (I²=76%, P=0.02); 9. GFR: The increase in CRRT group was better than that in the internal medicine drug treatment group[MD=21.36,95%CI(18.59, 24.13), P＜0.00001], (I²=0%, P=0.73); 10.Ccr:The recovery of the CRRT group was better than that of the internal medicine drug treatment group[MD=7.68,95%CI(4.52, 10.83)P＜0.00001](I²=82%, P=0.02); 11.SV: There was no statistically significant difference between the CRRT group and the internal medicine treatment group[MD=2.35, 95%CI(-3.38, 8.07), P=0.42], (I²=92%, P=0.0006); 12. CysC: There was no statistically significant difference between the CRRT group and the internal medicine treatment group[MD=-1.13, 95%CI(-2.41, 0.15), P=0.08], (I²=95%, P=0.00001); 13. K+: There was no statistically significant difference between the CRRT group and the internal medicine treatment group[MD=-0.15, 95%CI(-0.31, 0.01), P=0.07], (I²=0%, P=0.75)
Mechanism and Research Progress of Mitochondrial Quality Control in Osteoarthritis
Get PDFOsteoarthritis (OA) is a chronic disease characterized by degenerative lesions of articular cartilage, which is characterized by cartilage degeneration, bone redundancy formation and synovial inflammation. Recent studies have found that mitochondrial dysfunction is closely related to the development of OA. Mitochondrial quality control (MQC) mechanisms, including mitochondrial biogenesis, mitochondrial dynamics and mitochondrial autophagy, are essential for maintaining mitochondrial function. Therefore, targeted regulation of mitochondrial quality control is a promising therapeutic strategy. This article reviews the mechanism of MQC and its relationship with OA, as well as the research progress of targeting and regulating MQC to prevent and treat OA, aiming to provide a theoretical basis for the pathogenesis and preventive strategies of OA
Exploration of the Safety and Threats Associated with Smart Agriculture-related Technologies
Get PDFSmart agriculture integrates cutting-edge information technologies such as big data, artificial intelligence, and blockchain, deeply integrating them into production decision-making and circulation links related to agriculture, forming a new agricultural business model and solution with significant advantages of intensification, precision, automation, and informatization. Therefore, properly handling the relationship between Agricultural Big Data technology and data security becomes particularly critical.The concept of Agricultural Big Data, comprehensively analyzing various current viewpoints. Subsequently, through specific cases, it elaborates on the driving role of Agricultural Big Data in various links of the agricultural supply chain. To further delves into the unique characteristics of Agricultural Big Data, including its ubiquity, sociality, and interdisciplinarity. Starting from the common problems of big data, it introduces specific issues in the agricultural field and proposes targeted security solutions based on actual smart agriculture application scenarios. This paper aims to provide a new perspective for future research on solving data security issues in the field of smart agriculture, to promote the more rapid and secure development of smart agriculture
The Simulation of Gas Film Flow Field in Aerostatic Thrust Bearing
Get PDFBased on the CFD software, the numerical simulation and visualization of the gas flow in the gas film gap are carried out. Considering the influence of gas flow, the laminar flow model was adopted when the clearance is relatively small and a realizable model was adopted for large gaps. This research analyzes the effect of bearing clearance on gas pressure, velocity and Mach number, and accurately captures the flow field characteristics of the bearing inlet region. The calculation results show that the inlet gas film pressure drops significantly or even lower than the ambient pressure under large clearance conditions, so the influence of inertial force cannot be ignored. The mechanism of pressure drop and recovery is revealed by the theory of expansion wave and compression wave for the phenomenon of shock wave near the entrance