Meshing Force of Misaligned Spline Coupling and the Influence on Rotor System

Meshing force of misaligned spline coupling is derived, dynamic equation of rotor-spline coupling system is established based on finite element analysis, the influence of meshing force on rotor-spline coupling system is simulated by numerical integral method. According to the theoretical analysis, meshing force of spline coupling is related to coupling parameters, misalignment, transmitting torque, static misalignment, dynamic vibration displacement, and so on. The meshing force increases nonlinearly with increasing the spline thickness and static misalignment or decreasing alignment meshing distance (AMD). Stiffness of coupling relates to dynamic vibration displacement, and static misalignment is not a constant. Dynamic behaviors of rotor-spline coupling system reveal the following: 1X-rotating speed is the main response frequency of system when there is no misalignment; while 2X-rotating speed appears when misalignment is present. Moreover, when misalignment increases, vibration of the system gets intricate; shaft orbit departs from origin, and magnitudes of all frequencies increase. Research results can provide important criterions on both optimization design of spline coupling and trouble shooting of rotor systems

Interspecific variation and environmental drivers of rhizosphere microbiomes in endemic Impatiens species

IntroductionUnderstanding rhizosphere microbiomes of endemic plants is crucial for their conservation, yet it remains poorly explored, in particular for species-rich genera with high endemism rates like Impatiens.MethodsWe investigated rhizosphere bacterial and fungal communities of five Impatiens species (including two endemics) across altitude gradients in subtropical China using high-throughput sequencing. We analyzed microbial community structure in relation to environmental factors, soil properties, and plant traits.ResultsSignificant interspecific variations were observed in both bacterial and fungal communities, with endemic species harboring distinct microbiomes. Fungal communities showed stronger species-specificity than bacterial communities, particularly in the endemic I. suichangensis. Redundancy analysis revealed that elevation explained a substantially higher proportion of fungal community variation compared to bacterial variation. Soil nutrients and pH strongly influenced microbial community structure, while plant traits showed species-specific correlations with particular microbial taxa. Notably, companion plant diversity positively correlated with fungal diversity indices.DiscussionThese findings highlight the complex associations among plant traits, environmental factors, and rhizosphere microbiomes in Impatiens species, providing correlative evidence for potential plant-microbe interactions in endemic plant species. Our results emphasize the importance of considering both above- and below-ground components in conservation strategies for endemic plant species

Objectification decreases prosociality: the mediating role of relative deprivation

Objectification denies individuals’ personhood and renders them as tools for facilitating others’ goal achievement. With two studies (N = 446), the present investigation aimed to contribute to the literature by testing whether and how objectification impacts prosociality, including prosocial intention and prosocial behavior. Study 1, with a correlational design, aimed to test whether participants with greater experience of objectification would report lower levels of prosociality, and to test whether participants’ relative deprivation could account for the proposed association between objectification and prosociality. To further test these associations and provide causal evidence, in Study 2, we manipulated objectification by asking participants to imagine future objectification experiences. These studies converged in support of the negative relationship between objectification and prosocial intention, as well as the mediating role of relative deprivation. Regarding prosocial behavior, our findings support a mediating mechanism between objectification and prosocial behavior, although the evidence for the effect of objectification on prosocial behavior is not sufficient. These findings enrich our understanding of the consequences of objectification, while highlighting interpersonal processes’ contribution to prosocial intention and behavior. The limitations and potential future directions were discussed

Spatial Pattern and Influence Factor Analysis of Soil Organic Matter Based on the GeoDetector Model: Taking Liaoyang—Anshan Area as an Example

Spatial pattern of organic matter distribution and its influencing factors in the study area can provide a decision-making basis for territorial spatial planning. The majority of previous studies in this area focused on the soil surface, and most of them studied the influence of single factors. Therefore, the characteristics, spatial pattern and multi-factor influence of soil horizontal and vertical organic matter content were studied. The results showed that organic matter was higher in the southeast and lower in the northwest, and decreased with increasing depth. Organic matter was positively correlated with total nitrogen, total phosphorus, viscosity and silt content, and negatively correlated with sand content and bulk density. The interaction of any two factors was greater than that of a single factor. The BRIEF REPORT is available for this paper at http://www.ykcs.ac.cn/en/article/doi/10.15898/j.ykcs.202412050251

Relationship-Oriented Software Defined AS-Level Fast Rerouting for Multiple Link Failures

Large-scale deployments of mission-critical services have led to stringent demands on Internet routing, but frequently occurring network failures can dramatically degrade the network performance. However, Border Gateway Protocol (BGP) can not react quickly to recover from them. Although extensive research has been conducted to deal with the problem, the multiple failure scenarios have never been properly addressed due to the limit of distributed control plane. In this paper, we propose a local fast reroute approach to effectively recover from multiple link failures in one administrative domain. The principle of Software Defined Networking (SDN) is used to achieve the software defined AS-level fast rerouting. Considering AS relationships, efficient algorithms are proposed to automatically and dynamically find protection paths for multiple link failures; then OpenFlow forwarding rules are installed on routers to provide data forwarding continuity. Our approach is able to ensure applicability to ASes with flexibility and adaptability to multiple link failures, contributing toward improving the network performance. Through experimental results, we show that our proposal provides effective failure recovery and does not introduce significant control overhead to the network.</jats:p

Distribution Characteristics and Source Analysis of Soil Heavy Metals in the Liaoyang—Dandong Region

The Liaoyang—Dandong region is an important grain and cash crop production area in Liaoning Province. It is of great significance for monitoring the quality of black soil and studying the migration and transformation of heavy metals in soil to understand the distribution characteristics and sources of heavy metals in soil from 0 to 500cm. Soil samples were collected from different layers, and the contents of 8 heavy metal elements and Sc elements were determined. The average contents did not exceed the pollution risk screening value, Cd and Hg were obviously enriched in the surface soil, and Pb and Zn showed a certain enrichment trend. Cd, Hg, Pb and Zn in the surface soil were slightly polluted, the middle layer of soil was slightly polluted by Pb, and the deep layer of soil was not polluted. Pb, As, Co, Cu, Cr, Sc and Zn were affected mainly by natural background, Pb and Zn were affected slightly by local human factors, and Cd and Hg were affected significantly by human activities. In the future, it will be necessary to strengthen the monitoring of the enrichment trend of Hg, Cd, Pb and Zn elements in different plots. The BRIEF REPORT is available for this paper at http://www.ykcs.ac.cn/en/article/doi/10.15898/j.ykcs.202404070080

Exploration on the Stratification of the Ground Substrate Survey and the Design and Construction of Its Testing Indicator System

The ground substrate layer is the main carrier of the material and energy cycle of the earth’s surface. At present, it is essential to have a suitable ground substrate stratification and testing index system for conducting an effective ground substrate survey. Based on the pilot results of the ground substrate survey project in the past three years, and the links between ground substrate with Multi-Objective Regional Geochemical Surveys, the Third National Soil Census and the National Detailed Survey of Soil Pollution on Agricultural Land, the ground substrate can be vertically divided into three layers: the surface production layer (0-2m), the middle ecological layer (2-10m) and the deep sedimentary layer (10-20m). If the depth of the base layer is less than 20m, the ground substrate is exposed to the bedrock. The surface layer mainly serves the national food security, and mainly collects data; the middle layer focuses on territorial space planning, and is the focus of investigation; the deep layer is mainly to explore the ground substrate from bedrock-deep layer-middle layer-surface layer succession pattern, a small amount of engineering control is appropriate. The proposed vertical stratified test index system for ground substrate includes 4 required indices and N selected indices. The established stratification and stratification test index system of ground substrate can provide reference for standardizing the ground substrate survey and promote the high-quality development of the ground substrate survey. The BRIEF REPORT is available for this paper at http://www.ykcs.ac.cn/en/article/doi/10.15898/j.ykcs.202310080157

A Multilab Replication of the Ego Depletion Effect

There is an active debate regarding whether the ego depletion effect is real. A recent preregistered experiment with the Stroop task as the depleting task and the antisaccade task as the outcome task found a medium-level effect size. In the current research, we conducted a preregistered multilab replication of that experiment. Data from 12 labs across the globe (N = 1,775) revealed a small and significant ego depletion effect, d = 0.10. After excluding participants who might have responded randomly during the outcome task, the effect size increased to d = 0.16. By adding an informative, unbiased data point to the literature, our findings contribute to clarifying the existence, size, and generality of ego depletion

Coping Mediates the Association Between Type D Personality and Perceived Health in Chinese Patients with Coronary Heart Disease

Background: Increasing evidence show that Type D personality is a risk factor for morbidity, mortality, and quality of life of patients with coronary vascular disease. Few studies examined coping as a potential behavioral mechanism to explain the harmful effect of Type D personality. Purpose: This study examined the association between Type D personality, coping, and perceived health among Chinese patients with coronary heart disease (CHD). Methods: One hundred seventeen CHD patients completed the assessments on Type D personality, coping, perceived severity of CHD, and morale. Results: There was no difference on severity of coronary artery stenosis between Type D and non-Type D patients. Compared to the non-Type D patients, the Type D patients perceived higher severity of CHD (5.31±2.41 versus 4.45±2.17, p<0.05) and lower morale (12.67±4.71 versus 15.00±4.43, p<0.05), and used less confrontation (16.90±5.39 versus 20.88±4.95, p<0.001) and more acceptance-resignation coping (10.16±3.50 versus 8.35±3.48, p<0.05). Mediation analyses showed that confrontation coping mediated the association between Type D personality and perceived severity of disease, and acceptance-resignation coping mediated the association between Type D personality and morale after controlling for age, gender, and clinical variables. Conclusion: The Type D patients used maladaptive coping in response to disease. These coping strategies fully mediated the association between Type D personality and perceived health. Implications for integrating coping training into the intervention for patients with a Type D personality are discussed. © 2010 The Author(s).published_or_final_versionSpringer Open Choice, 21 Feb 201