Estimation of Displacement and Extension due to Reverse Drag of Normal Faults: Forward Method

In the case of reverse drag of normal faulting, the displacement and horizontal extension are determined based on the established equations for the three mechanisms: rigid body, vertical shear and inclined shear. There are three sub-cases of basal detachment for the rigid body model: horizontal detachment, antithetic detachment and synthetic detachment. For the rigid body model, the established equations indicate that the total displacement on the synthetic base (Dt2) is the largest, that on the horizontal base (Dt1) is moderate, and that on the antithetic base (Dt3) is the smallest. On the other hand, the value of (Dt1) is larger than the displacement for the vertical shear (Dt4). The value of (Dt1) is larger than or less than the displacement for the inclined shear (Dt5) depending on the original fault dip δ0, bedding angle θ, and the angle of shear direction β. For all original parameters, the value of Dt5 is less than the value of Dt4. Also, by comparing three rotation mechanisms, we find that the inclined shear produces largest extension, the rigid body model with horizontal detachment produces the smallest extension, and the vertical shear model produces moderate extension.

Establishment of extensively drug-resistant Pseudomonas aeruginosa pneumonia model in rat

Objective:To establish extensively drug-resistant Pseudomonas aeruginosa(XDR-PA)infection-induced pneumonia model in rats.Methods:Twenty-four male SD rats were randomly divided into blank group,low bacterial group,medium bacterial group,and high bacterial group.The low,medium and high bacterial groups were given intratracheal instillation of 0.1 mL of bacterial suspension(bacterial concentration in turn is 7.5×10^(9),3×10^(10),6×10^(10)CFU/mL),while the blank group were given the same volume of sterile normal saline.After modeling,the general conditions of rats in each group were observed,including mental state,hair,respiration,activity,eating,weight,and the survival curve was drawn.The pathological characteristics of lung tissue and the infiltration of inflammatory cells were observed.Pathogenic identification of each group was carried out by bacterial culture of lung tissue homogenate.Results:The general state of the blank group was normal,and the rats in other groups showed signs of mental depression,bristling,shortness of breath,even oral and nasal bleeding,decreased food intake and activity,and significant weight loss,and different degrees of death within 48 hours,the difference was statistically significant(P<0.05).Pathological results showed that the alveolar structure of rats in the blank group was complete,and the alveolar space was clear without exudation.The lung tissue of the low and medium bacterial groups showed obvious inflammatory cell infiltration,alveolar structure destruction,alveolar septum thickening,interstitial edema,but the pathological damage of the medium group was more severe,with a mortality rate of up to 50%,and the mortality rate of the low bacterial group was 17%.In the high bacterial group,red blood cells,inflammatory cells and a large amount of fibrin-like exudation can be seen in the alveolar space,which has the pathological characteristics of acute respiratory failure,and the mortality rate is as high as 67%.The results of bacterial culture of lung tissue homogenate showed that the blank group had no bacterial colonies,while PA colony growth can be seen in low,medium and high bacterial groups.Conclusion:9 Intratracheal instillation of low bacterial count(0.1 mL of 7.5×10^(9) CFU/mL)XDR-PA bacterial suspension can successfully construct a rat pneumonia model of XDR-PA infection.

Extension Modeling Strategy of Intelligent Detection in D.huoshanense Photosynthesis Process

Aiming at the limitations of the existing knowledge representations in intelligent detection, a new method of Extension-based Knowledge Representation (EKR) was proposed. The definitions, grammar rules, and storage structure of EKR were presented. An Extension Solving Model (ESM) based on EKR was discussed in detail, including creation of the extension constraint graph, extended inference, calculation of relevant functions and generation of extension set. A knowledge base system based on EKR and ESM was developed, which was applied in extension repository system intelligent design of detection in photosynthesis process of D.huoshanense. More reasonable results were obtained than traditional rule-based system. EKR was feasible in intelligent design to solve the problem of intelligent detection knowledge representations.

Effect Analysis of Gurson Model Parameters on Crack Extension of Pipeline

Leakage-before-break technique is widely used in high energy pipeline of nuclear plant, for which crack stability of pipeline under complex loading condition is a key issue, and crack growth resistance curve of pipeline material is the important foundation for crack stability analysis. In this paper, ferritic steel A533B is studied, Gurson damage model is used to simulate crack process of contact tension specimen under unitension, and effect of Gurson model parameter on simulation result is discussed. The following results are found during simulation: initial porosity factor is the main parameter, when it increases gradually, unstable crack extension will be observed;however, only initial J toughness is affected by critical porosity factor;the minor parameter is load step control, when it increases, stable and convergent result is obtained. All results in this paper can be used to determine parameters in Gurson mode, which will be foundation for crack extension analysis of pipeline.

Two-Dimensional Lithium-Ion Battery Modeling with Electrolyte and Cathode Extensions

A two-dimensional model for transport and the coupled electric field is applied to simulate a charging lithium-ion cell and investigate the effects of lithium concentration gradients within electrodes on cell performance. The lithium concentration gradients within electrodes are affected by the cell geometry. Two different geometries are investigated: extending the length of the electrolyte past the edges of the electrodes and extending the length of the cathode past the edge of the anode. It is found that the electrolyte extension has little impact on the behavior of the electrodes, although it does increase the effective conductivity of the electrolyte in the edge region. However, the extension of the cathode past the edge of the anode, and the possibility for electrochemical reactions on the flooded electrode edges, are both found to impact the concentration gradients of lithium in electrodes and the current distribution within the electrolyte during charging. It is found that concentration gradients of lithium within electrodes may have stronger impacts on electrolytic current distributions, depending on the level of completeness of cell charge. This is because very different gradients of electric potential are expected from similar electrode gradients of lithium concentrations at different levels of cell charge, especially for the LixC6 cathode investigated in this study. This leads to the prediction of significant electric potential gradients along the electrolyte length during early cell charging, and a reduced risk of lithium deposition on the cathode edge during later cell charging, as seen experimentally by others.

EXTENSION OF SEQUENCE STRATIGRAPHIC MODELAND SEQUENCE STRATIGRAPHIC ANALYSIS IN LIMNIC DEPOSITIONAL BASIN

The architectural patterns of sedimentary succession are diverse in different depositionalbasins. The sedimentary architecture and geological condition of such basins asepicontinental sea, intraplate limnic basins, etc., differ cIearly from those of continentalmargin basin. Extension, complement and perfection of sequence stratigraphic models are needed in the studies of various depositional basins based on the classical sequence model. This paper, for this reason,expounds the thought, principles of sequence division, methodology and technology of the study of sequence stratigraphy in epicontinental and limnic basins.

Calculation of the Standard Model Parameters and Particles Based on a SU(4) Preon Model

This paper describes an extension and a new foundation of the Standard Model of particle physics based on a SU(4)-force called hyper-color, and on preon subparticles. The hyper-color force is a generalization of the SU(2)-based weak interaction and the SU(1)-based right-chiral self-interaction, in which the W-and the Z-bosons are Yukawa residual-field-carriers of the hyper-color force, in the same sense as the pions are the residual-field-carriers of the color SU(3) interaction. Using the method of numerical minimization of the SU(4)-action based on this model, the masses and the inner structure of leptons, quarks and weak bosons are calculated: the mass results are very close to the experimental values. We calculate also precisely the value of the Cabibbo angle, so the mixing matrices of the Standard model, CKM matrix for quarks and PMNS matrix for neutrinos can also be calculated. In total, we reduce the 29 parameters of the Standard Model to a total of 7 parameters.

NUMERICAL MODELLING OF LITHOSPHERE EVOLUTION IN THE NORTH CHINA CRATON: THERMAL THINNING VERSUS TECTONIC EXTENSION THINNING

The boundary between lithosphere and asthenosphere essentially represents a thermal boundary (the solidus). Temperature variation across this boundary can lead to the change of lithosphere thickness. In the case of elevated temperatures in a lithospheric layer above 1 200℃, partial melting will begin and the result of that is a thinned lithosphere. The other mechanism that can also thin lithosphere is extension. Stretching during an extension event can result in a thinner and longer lithosphere. The two mechanisms above are the reason why we can alserve large variations in lithosphere thickness spatially across various continents and temporally throughout the geological history.

SWAT和WetSpa Extension在罗玉沟流域的应用比较

近年来,运用水文模型来研究流域水文状况越来越普遍,本文以黄土高原丘陵沟壑区第三副区的典型小流域为例,基于SWAT和WetSpa Extension两个模型,从模型的输入数据、模型的参数和模型模拟结果等方面进行比较,以期为该区水沙模拟选择合适水文模型并为将来模型性能的改进提供参考。连续15年的校准验证表明:两个模型都能得到较好的结果,而SWAT模型能应用于水文及泥沙等模拟过程,相对来说功能更全面;WetSpa Extension模型目前仅能提供水文模拟的模块,优点在于模拟时间步长较任意,可进行洪水模拟。

Mesoscale SST perturbation-induced impacts on climatological precipitation in the Kuroshio-Oyashio extension region,as revealed by the WRF simulations

Mesoscale coupling between perturbations of mesoscale sea surface temperature (SST) and lowlevel winds has been extensively studied using available high-resolution satellite observations. However, the climatological impacts of mesoscale SST perturbations (SST meso ) on the free atmosphere have not been fully understood. In this study, the rectified eff ect of SSTmeso on local climatological precipitation in the Kuroshio- Oyashio Extension (KOE) region is investigated using the Weather Research and Forecasting (WRF) Model;two runs are performed, one forced by low-resolution SST fields (almost no mesoscale signals) and another by additional high-resolution SSTmeso fields extracted from satellite observations. Climatological precipitation response to SST meso is characterized mainly by enhanced precipitation on the warmer flank of three oceanic SST fronts in this region. The results show that the positive correlation between the 10-m wind speed perturbations and SSTmeso is well captured by the WRF model with a reasonable spatial pattern but relatively weak strength. The addition of SSTmeso improves the climatological precipitation simulated by WRF with a better representation of fine-scale structures compared with satellite observations. A closer examination on the underlying mechanism suggests that while the pressure adjustment mechanism can explain the climatological precipitation enhancement along the fronts and the relatively high contribution of the convective precipitation, other factors such as synoptic events should also be taken into consideration to account for the seasonality of the precipitation response.

AN APPLICATION OF EXTENSION THEORY TO THE EVALUATION OF SLOPE STABILITY

The slope stability is affected by multiple factors. Thecomprehensive evaluation of the slope stability is a complicateproblem. The principles of extension theory have been used in thispaper to establish the matter-element model for the evaluation ofslope stability. The quantitative evaluated results have been giventhrough the calculation of the matter-element dependent degree.

Optimal Precursors Triggering the Kuroshio Extension State Transition Obtained by the Conditional Nonlinear Optimal Perturbation Approach

In this study, the initial perturbations that are the easiest to trigger the Kuroshio Extension （KE） transition connecting a basic weak jet state and a strong, fairly stable meandering state, are investigated using a reduced-gravity shallow water ocean model and the CNOP （Conditional Nonlinear Optimal Perturbation） approach. This kind of initial perturbation is called an optimal precursor （OPR）. The spatial structures and evolutionary processes of the OPRs are analyzed in detail. The results show that most of the OPRs are in the form of negative sea surface height （SSH） anomalies mainly located in a narrow band region south of the KE jet, in basic agreement with altimetric observations. These negative SSH anomalies reduce the merid- ional SSH gradient within the KE, thus weakening the strength of the jet. The KE jet then becomes more convoluted, with a high-frequency and large-amplitude variability corresponding to a high eddy kinetic energy level; this gradually strengthens the KE jet through an inverse energy cascade. Eventually, the KE reaches a high-energy state characterized by two well defined and fairly stable anticyclonic meanders. Moreover, sensitivity experiments indicate that the spatial structures of the OPRs are not sensitive to the model parameters and to the optimization times used in the analysis.

Application of extension method to fault diagnosis of transformer

A novel extension diagnosis method was proposed for enhancing the diagnosis ability of the conventional dissolved gas analysis. Based on the extension theory a matter-element model was established for qualitatively and quantitatively describing the fault diagnosis problem of power transformers. The degree of relation based on the dependent functions was employed to determine the nature and the grade of the faults in a transformer system. And the proposed method was verified with the experimental data. The results show that accuracy rate of the diagnosis method exceeds 90% and two kinds of faults can be detected at the same time.

Crustal extension in North China since the Mesozoic: A numerical study

The ~1.8 billion years old North China Craton(NCC)has been thermally rejuvenated during the Mesozoic,experiencing two major phases of crustal extension and volcanism since then.The earlier phase of extension,lasted from middle Mesozoic to early Cenozoic,was widespread in eastern NCC and accompanied with extensive volcanism.The later phase of extension,started in late Cenozoic and is active today,has been localized around the Ordos block,a residual core of the NCC,with limited volcanism.Here we investigate the causes of the NCC extension using finite element method.Numerical results indicate that the diffuse and closely-spaced extension during Mesozoic and early Cenozoic requires a thin and weak lithosphere,which supports the notion of significant lithospheric thinning under the eastern NCC,perhaps by delamination or thermal erosion of the lithospheric root.The western NCC,including the Ordos block,was largely spared by this phase of extension.The late Cenozoic extension around the Ordos block is commonly attributed to the Indo-Asian collision and mantle flow under eastern NCC.Our numerical results show that,regardless of the causing mechanism,a relatively thick and strong lithosphere is needed for the localized extension in western NCC,and preexisting weak zones in the lithosphere is a necessary condition for localized rifting around the Ordos.This preexisting lithospheric weakness is most likely inherited from the amalgamation of the NCC basement ~1.8 billion years ago.The late Cenozoic circum-Ordos rifting thus illustrates the control of ancient continental structures on recent tectonics.

Assessing the impact of non-governmental organization’s extension programs on sustainable cocoa production and household income in Ghana

Globally,cocoa is famous for the production of chocolates and beverages.However,it also serves as a source of raw material for the manufacturing of high-quality cosmetic and pharmaceutical products. Due to its high demand,cocoa is regarded as a major commodity for poverty alleviation in deprived cocoa farming communities. Government has therefore instigated relevant measures to address issues facing the sector by investing in extension programs. These programs act as information dissemination tools for teaching modern farming technologies and enhancing learning among farmers. This study highlighted the effects of the Cocoa Life Project (CLP) by Cooperative for Assistance and Relief Everywhere (CARE) International on farm productivity and income of 200 cocoa farmers in three districts of the Eastern Region,Ghana. Regression on covariates,Heckman’s treatment effects model,and propensity scores were used to test the robustness of the estimates. A positive association between extension program participation,farm productivity,and household income was discovered. Specifically,after correcting for selection bias,the estimated results of the Heckman’s model showed that the extension program significantly increased participating farmers’ cocoa yield by 14.3%. The effects on total farm income showed a significant increase of 25.1 and 42.9%,respectively from regression on propensity scores and the Heckman’s model. Across all three models,program participation led to an increase in total household income by 46.1,31.7,and 69.3%,respectively. Other variables such as farming characteristics,institutional and demographic factors affected farmers’ income,depending on the estimation method used. This study reiterated the supporting role played by extension programs in enhancing cocoa production and increasing household income in Ghana. Conclusively,government and development partners should invest in extension programs by providing enough logistics,training qualified agents,and creating a conducive atmosphere to support learning and technology adoption.

Seasonal Variability in the Kuroshio Extension Current System

Based on the GDEM hydrographic data with a resolution of 0.5°× 0.5°, the current system (Kuroshio south of Japan and Kuroshio Extension east of Japan) is determined by using the P-Vector Method, and its seasonal variability is investigated. The Kuroshio Meander south of Japan, the two lee-wave meanders in the Kuroshio Extension and the bifurcation of the Kuroshio Extension are properly presented. The path of the Kuroshio Meander, the position of the second (east) meander in the Kuroshio Extension and the bifurcation of the Kuroshio Extension display evident seasonal variation.

Effect of mesoscale wind stress-SST coupling on the Kuroshio extension jet

Effect of mesoscale wind stress-SST coupling on the Kuroshio extension jet is studied using the Regional Ocean Modeling System. The mesoscale wind stress perturbation( τ_(MS)) is diagnostically determined from modelled mesoscale SST perturbation(SST_(MS)) by using their empirical relationship derived from corresponding observation. From comparing two experiments with and without the τ_(MS) feedback, it is found that the interactively represented τ_(MS)-SST_(MS) coupling can modulate the kinetic energy along the Kuroshio extension jet, with little effect on the Kuroshio pathway. Similar results are also obtained in three additional sensitivity experiments, which consider half strength of the τ_(MS), and the momentum flux and heat flux effect induced by τ_(MS), respectively. That means simply taking into account the τ_(MS)-SST_(MS) coupling has little effect on improving the simulation of the Kuroshio Current system.

盾构施工诱发临近桥梁安全风险评价

针对地铁盾构施工诱发临近桥梁安全风险评估结果不完善、存在失真等问题,提出一种基于变权可拓云模型的盾构施工诱发临近桥梁安全风险评价方法。首先,结合以往研究基础和实际工程经验,建立盾构施工诱发临近桥梁安全事故机理模型,进而确定孕险环境、致险因子和承险体3个1级指标,其中包括有岩土层物理性能参数、隧道工程条件、盾构施工条件、盾构施工参数、施工管理风险、桥梁现状及桥梁自身条件7个2级指标和内摩擦角、弹性模量等27个3级指标为依据建立盾构施工诱发临近桥梁安全风险评价指标体系。其次,通过改进CRITIC客观赋权法获取评价指标权重,并采用变权可拓云模型构建盾构施工诱发临近桥梁安全风险评价模型,其中引入变权理论得到使评价结果更加科学合理的变化权重。最后,对某市轨道交通1号线一期工程Ⅱ标段沿线桥梁进行实例分析。研究结果表明,4座盾构施工临近桥梁安全风险等级分别为Ⅲ、Ⅱ、Ⅱ、Ⅰ级。其中,该施工场地各项土体指标、隧道覆跨比、隧道埋深、隧道直径及桥桩与隧道的相对位置等指标风险较大,即该段隧道盾构施工时对于桥梁自身情况及其施工场地环境需要重点监测,并严格做好周围土体加固等各项技术措施。研究结果可为盾构施工诱发临近桥梁安全风险防控提供科学有效的参考依据。

基于CT影像组学预测甲状腺乳头状癌甲状腺外侵犯的价值

目的:探究CT影像组学预测甲状腺乳头状癌(Papillary Thyroid Cancer,PTC)发生甲状腺外侵犯(Extrathyroidal Extension,ETE)的评估价值。方法:选取2021年10月至2022年10月于我院收治的PTC患者140例作为研究对象,采用随机数法按7∶3比例将患者分为训练集(n=98)和测试集(n=42),依据其是否发生ETE将训练集患者分为ETE组(n=55)和non-ETE组(n=43),基于CT影像组学评分及多元Logistic回归模型分析影响PTC患者发生ETE的关键因素,模型中纳入的变量基于单因素分析的结果,并采用逐步回归方法进行变量筛选。模型的拟合优度通过Hosmer-Lemeshow拟合优度检验进行评估。ROC曲线用于评估模型的区分能力,而校准曲线则用于评估模型的预测准确度。结果:两组患者在肿瘤边界、桥本甲状腺炎、中央区淋巴结转移、多灶性、肿瘤最大径、颈侧区淋巴结转移、年龄方面差异有统计学意义(均P<0.05);多元Logistic回归模型结果表明肿瘤最大径、多灶、颈部淋巴结转移、年龄、平扫Rad-score、增强扫描Rad-score是影响PTC患者发生ETE的独立危险因素;并基于CT影像组学评分和其独立危险因素绘制列线图,ROC曲线、校准曲线结果显示该预测模型区分度和准确度较好。训练集(AUC=0.962)和测试集(AUC=0.937)的AUC值均接近1,表明该预测模型具有良好的区分能力,能够准确地区分发生ETE和未发生ETE的PTC患者。这为临床医生在制定治疗方案和评估患者预后提供了重要的参考依据。结论:临床医师对于年龄≥55岁、肿瘤最大径>2.0 cm、伴有多灶、颈部淋巴结转移PTC患者,基于CT影像组学可较好地预测ETE发生风险,可为临床提供参考依据。