Geochemical fingerprints and hydrocarbon potential of Paleocene mudrocks in the Tano Basin, Ghana: insights from biomarkers and stable carbon isotopes

The Paleocene mudrocks in Ghana’s Tano Basin have received limited attention despite ongoing efforts to explore hydrocarbon resources.A thorough geochemical analysis is imperative to assess these mudrocks’petroleum generation potential and formulate effective exploration strategies.In this study,a comprehensive geochemical analysis was carried out on ten Paleocene rock cuttings extracted from TP-1,a discovery well within the Tano Basin.Various analytical techniques,including total organic carbon(TOC)analysis,Rock–Eval pyrolysis,gas chromatography-mass spectrometry,and isotope ratio-mass spectrometry,were employed to elucidate their hydrocar-bon potential and organic facies.Thefindings in this study were subsequently compared to existing geochemical data on Paleocene source rocks in the South Atlantic marginal basins.The results indicated that the Paleocene samples have TOC content ranging from 0.68 to 2.93 wt%.The prevalent kerogen types identified in these samples were Type Ⅱ and Type Ⅲ.Molecular and isotope data suggest that the organic matter found in the Paleocene mudrocks can be traced back to land plants and lower aquatic organisms.These mudrocks were deposited in a transi-tional environment withfluctuating water salinity,charac-terized by sub-oxic redox conditions.Maturity indices,both bulk and molecular,indicated a spectrum of maturity levels within the Paleocene mudrocks,spanning from immature to marginally mature,with increasing maturity observed with greater depth.In comparison,the organic composition and depositional environments of Paleocene source rocks in the Tano Basin closely resemble those found in the Niger Delta Basin,Douala,and Kribi-Campo Basins,the Kwanza Formation in Angola,and certain Brazilian marginal basins.However,it is worth noting that Paleocene source rocks in some of the basins,such as the Niger Delta and Brazilian marginal basins,exhibit rela-tively higher thermal maturity levels compared to those observed in the current Paleocene samples from the Tano Basin.In conclusion,the comprehensive geochemical analysis of Paleocene mudrocks within Ghana’s Tano Basin has unveiled their marginal hydrocarbon generation potential.The shared geochemical characteristics between the Paleocene mudrocks in the Tano Basin and those in the nearby South Atlantic marginal basins offer valuable insights into source rock quality,which is crucial for shaping future strategies in petroleum exploration in this region.

Mitochondria–cGAS–STING axis is a potential therapeutic target for senescence-dependent inflammaging-associated neurodegeneration

The word “senescence” comes from the Latin senescens, meaning “to begin to age”, and is characterized by a long-lasting but reversible block in proliferation, resulting from stress-induced cell cycle arrest of previously replication-competent cells.

Normalized Solutions of Nonlinear Choquard Equations with Nonconstant Potential

In this paper,we mainly focus on a type of nonlinear Choquard equations with nonconstant potential.Under appropriate hypotheses on potential function and nonlinear terms,we prove that the above Choquard equation with prescribed 2-norm has some normalized solutions by introducing variational methods.

Understanding the local structure and thermophysical behavior of Mg-La liquid alloys via machine learning potential

The local structure and thermophysical behavior of Mg-La liquid alloys were in-depth understood using deep potential molecular dynamic(DPMD) simulation driven via machine learning to promote the development of Mg-La alloys. The robustness of the trained deep potential(DP) model was thoroughly evaluated through several aspects, including root-mean-square errors(RMSEs), energy and force data, and structural information comparison results;the results indicate the carefully trained DP model is reliable. The component and temperature dependence of the local structure in the Mg-La liquid alloy was analyzed. The effect of Mg content in the system on the first coordination shell of the atomic pairs is the same as that of temperature. The pre-peak demonstrated in the structure factor indicates the presence of a medium-range ordered structure in the Mg-La liquid alloy, which is particularly pronounced in the 80at% Mg system and disappears at elevated temperatures. The density, self-diffusion coefficient, and shear viscosity for the Mg-La liquid alloy were predicted via DPMD simulation, the evolution patterns with Mg content and temperature were subsequently discussed, and a database was established accordingly. Finally, the mixing enthalpy and elemental activity of the Mg-La liquid alloy at 1200 K were reliably evaluated,which provides new guidance for related studies.

情绪对低感觉寻求者安全行为决策的影响:来自ERPs的证据

为从神经层面深究不同偶然情绪对低感觉寻求者的不安全行为决策过程的影响作用,采用事件相关电位(ERPs)技术进行试验研究。使用中国版大学生感觉寻求问卷筛选低感觉寻求者和中感觉寻求者(对照组)。采用视频片段作为情绪刺激材料在试验前诱发正性和负性情绪,并设置风险情景任务进行风险决策试验。结果表明:不考虑情绪变量时,低感觉寻求组与感觉寻求对照组在安全行为决策上无显著差异;正性情绪下,低感觉寻求个体保持风险规避倾向;负性情绪下,在行为表现上,低感觉寻求者更倾向作出不安全行为决策;负性情绪下,在ERPs成分上,低感觉寻求者诱发的晚期正成分(LPP)潜伏期更晚,表明负性情绪的干扰导致个体在风险分类与评价时难度增大,故此从神经层面解释其外在行为表现的内在原因。总之,情绪在感觉寻求影响安全行为决策过程中产生调节作用。

ERP全景视频VVC帧内编码CU快速划分算法

针对等矩柱状投影(equirectangular projection,ERP)全景视频多功能视频编码(versatile video coding,VVC)帧内编码复杂度过高的问题,提出一种编码单元(coding unit,CU)快速划分算法。根据ERP采样特性,将编码帧分为不同纬度区域。基于不同纬度区域CU四叉树深度的分布特性和相邻CU的相关性,对当前CU的划分模式进行提前终止决策;利用梯度差异评估当前CU纹理特性,跳过冗余的水平或垂直划分模式。针对纹理模糊CU,通过纬度采样权重加权的二次比较,判断是否跳过垂直划分模式;利用二维哈尔小波变换系数评估当前CU子块间的差异,判断是否跳过三叉树划分模式。实验结果表明,在全帧内模式下,与VVC官方测试平台相比,所提算法能节省43.85%的编码时间,码率仅增加0.85%,视频质量没有明显下降。

基于LoadRunner的ERP系统性能测试方法

随着软件产业的发展,人们对软件质量的要求愈来愈高。性能测试是验证软件系统在不同负载下的性能表现,在软件的质量保证中起着重要的作用。文章介绍了性能测试工具LoadRunner及测试方法,按标准化测试流程,以系统管理员角色登录某ERP系统进行新增商品的业务为例,通过多次设置虚拟用户并发模拟真实环境中对ERP系统的压力,分析了系统的部分性能指标和负载瓶颈,为ERP系统开发者和使用者提供了一定的参考。

人工智能背景下ERP系统助力企业发展

ERP作为企业信息化过程中不可或缺的一环,不仅重构企业传统业务模式和管理流程,而且提升企业整体战略管理能力。因此,面对竞争日益激烈的市场环境,企业以ERP系统为手段走向信息化趋势不可避免。但在人工智能技术逐渐发展背景下,ERP系统在企业中发挥作用将面临着新的问题,同时也是新形势下ERP系统发展的机遇。本文首先对ERP系统概念进行简单概述,分析目前市场上主要的ERP系统品牌以及各自所擅长的领域,进而分析企业发展中ERP所起到的作用,探究在人工智能背景下ERP系统在企业发展中所面临的问题,并提出建议。

ERP在家用纺织品视觉感知研究中的探索与应用

事件相关电位(ERP)在“新文科”实验教学中的应用日益广泛。鉴于传统调研工具的局限性,探索性地将ERP技术应用于家用纺织品视觉感知研究中。选取不同明度、色调和图案的床上用品作为试验材料,通过脑电数据重点分析N100、P200和N200成分对视觉特征的响应。结果显示,高明度床品产生更大N100振幅,受试者更倾向于高明度、无图案床品。ERP技术可用于分析纺织品视觉感知中的审美偏好,为纺织品设计和“新文科”背景下应用型文科生的培养提供了新的途径。

物流管理专业ERP信息化实践项目的研究与实践

根据OBE思想,以学生为中心,探讨物流专业ERP信息化实践项目的建设。根据物流管理专业培养目标和ERP信息化实践项目的实践目标,从项目内容、项目教学设计、项目组织实施、教学方法与手段、项目考核评价等方面提出针对性的改革建议,从而培养更多的ERP应用型人才。

面向网络化制造的ERP综合实验教学模式研究与探索

随着信息技术的迅速发展,ERP在制造业中也得到广泛应用。基于ERP的智能制造技术包含传统加工、设备自动化、企业信息化等内容,对学生综合能力提出更高的要求,使高校实践教学面临新的挑战。为了改革原有ERP实践教学以沙盘模拟为主、授课和考核形式单一、缺乏对学生创造力和综合实践能力的培养等问题,提出了“基础—进阶—综合”的一体化实践课程体系,更加注重ERP理论知识和应用实践的融会贯通,突出体现学科交叉知识应用以及不同层次人才培养,对培养满足社会需求的制造业ERP专业人才具有重要的现实意义。

基于大数据分析课、赛衔接的课程体系结构优化研究——以ERP沙盘相关课、赛衔接的经管类课程体系为例

课程体系建设作为培养人才素质与专业能力的核心环节,其整体结构优化急需多元化评价体系改革,尤其弥补大数据相关客观评价。本文以某高校ERP沙盘衔接的相关竞赛成绩和经管类课程成绩(含个人成绩和竞赛团队成绩)为线索,通过依托决策树算法和随机森林算法的大数据挖掘分析方法,探明经管类课程对竞赛成绩的影响,并结合专业教学大纲变革展开相关经管类课程体系的结构优化分析。研究结果既为经管类课程体系结构优化提供建议,又为宏观层次的课程体系结构优化提供立足大数据客观分析的优化范例,一种衔接更多形成性评价的范例。

我国汽车产业ERP系统应用浅议

自1958年新中国第一辆“东风”轿车生产装配试车成功至今,我国汽车产业发展进入新发展阶段,随着我国新能源汽车发展的弯道超车,我国汽车产业无论从市场还是制造都有了未来发展更大的底气。本文从我国汽车产业发展的数字化背景出发,分析了我国汽车产业发展中应用ERP系统的必要性,提出我国汽车产业应用ERP系统时“干中学”需要进行调整。在此基础上,本文对我国汽车产业应用ERP系统提出重视产学研合作人才培养、持续关注ERP系统运维、重视ERP系统投入以及重视ERP系统与其他相关信息技术的融合等完善建议。

基于翻转课堂的ERP沙盘模拟实验课程教学设计

ERP沙盘模拟实验教学是一种体验式教学,通过角色扮演与岗位体验方式,有机地将理论与实践进行全面有效结合,在强化学生理论知识的同时,提高培养其动手能力和综合素质。以学生为中心的翻转课堂,重点培养学生的自主学习能力与实践能力。文章结合ERP沙盘模拟实验课程的特点,设计了基于翻转课堂的师生双主化实践教学模式,以提高ERP沙盘模拟课程的教学质量。

基于新一代ERP的制造业企业数字化转型研究——以F汽车集团为例

从信息化时代步入数智化时代,技术、商业、企业自身的进化与发展推动核心信息系统ERP的转型与升级。新一代ERP基于中台构建,融合数据智能,围绕数据分析与用户体验,打造生态化、敏捷化的部署架构,是对传统ERP弊端的克服与突破,是利用新技术、面向新组织、解决新问题的新方案。国有大中型企业先试先行,通过重构新一代ERP,构建全面数据驱动的运营管理信息平台,打造高效协同的业财融合体系,推动企业实现全方位的数字化转型。同时,企业要充分发挥新一代ERP的应用价值不单是技术层面的变革与创新,更重要的是需要在数字化管理理念、组织流程变革、数字化基础设施、组织文化转型以及人才发展等方面给予相应的配合与协调。

自我-群体决策对象和分配方式影响合作公平评价的ERP研究

采用事件相关技术,探讨在合作任务中,决策对象和分配方式如何影响个体公平评价的时间进程。使用2(决策对象:自我、群体)×2(分配方式:按贡献分配、平均分配)被试内设计。结果发现自我决策比为群体决策诱发更大的P2和更小的FRN;自我决策时,按贡献分配诱发的P3显著小于平均分配诱发的P3;为群体决策时,两种方式诱发的P3无显著差异。结果表明决策对象在早期阶段被优先加工与考虑,而晚期阶段的公平评价受到决策对象和分配方式的联合调节。

An improved interpolating element-free Galerkin method with a nonsingular weight function for two-dimensional potential problems

In this paper, an improved interpolating moving least-square （IIMLS） method is presented. The shape function of the IIMLS method satisfies the property of the Kronecker 5 function. The weight function used in the IIMLS method is nonsingular. Then the IIMLS method can overcome the difficulties caused by the singularity of the weight function in the IMLS method. The number of unknown coefficients in the trial function of the IIMLS method is less than that of the moving least-square （MLS） approximation. Then by combining the IIMLS method with the Galerkin weak form of the potential problem, the improved interpolating element-free Galerkin （IIEFG） method for two-dimensional potential problems is presented. Compared with the conventional element-free Galerkin （EFG） method, the IIEFG method can directly use the essential boundary conditions. Then the IIEFG method has higher accuracy. For demonstration, three numerical examples are solved using the IIEFG method.

Preparation of Polycarboxylate-based Superplasticizer and Its Effects on Zeta Potential and Rheological Property of Cement Paste

A series of polycarboxylate-based superplasticizers(PCs) with different structures were synthesized and the effects of chemical structure on zeta potential and rheological property of cement paste were studied. Residual monomers in each sample of PCs were quantitatively determined. The property of the polymers in cement was tested by micro-electrophoresis apparatus and R/S rheometer. Results showed that the zeta potential and its rheological properties are related with the side-chain length and density of PCs. The PCs having shorter side chain and lower side chain density exhibit higher anionic charge density, thus resulting in higher zeta potential. The effect of side chain density on zeta potential is more notable compared with that of side-chain length, and thus affecting the initial shear yield stress and apparent viscosity of the cement paste. In addition, although increasing the side chain length will result in reduction of the anionic charge density, the steric hindrance effect is obvious, which can effectively improve the dispersion of the cement particles, and reduce the viscosity and shear yield stress of slurry.

A moving Kriging interpolation-based boundary node method for two-dimensional potential problems

In this paper, a meshfree boundary integral equation （BIE） method, called the moving Kriging interpolation- based boundary node method （MKIBNM）, is developed for solving two-dimensional potential problems. This study combines the DIE method with the moving Kriging interpolation to present a boundary-type meshfree method, and the corresponding formulae of the MKIBNM are derived. In the present method, the moving Kriging interpolation is applied instead of the traditional moving least-square approximation to overcome Kronecker＇s delta property, then the boundary conditions can be imposed directly and easily. To verify the accuracy and stability of the present formulation, three selected numerical examples are presented to demonstrate the efficiency of MKIBNM numerically.

个体与集体时间自我评价:来自行为和ERP的证据

运用事件相关电位技术和时间自我参照任务,通过两个系列实验探讨了大学生的个体时间自我评价和集体时间自我评价。结果显示,被试采用更多积极词、更少消极词来评价过去、现在和未来的个体自我和集体自我,个体自我评价在过去、现在和未来维度上存在积极递增效应;个体自我和集体自我在过去和现在维度上的消极词比积极词诱发了更大LPC波幅,而未来维度上的积极词和消极词之间的LPC波幅无显著差异。这表明,中国大学生的个体时间自我评价和集体时间自我评价均具有跨时间的积极偏向。而且,个体与集体时间自我评价在神经生理水平上都存在负偏向效应。因此,中国大学生的集体时间自我评价与个体时间自我评价具有相似的认知神经特点,在一定程度上为依存型自我建构理论提供了支持证据。