Three-dimensional structural models,evolution and petroleum geological significances of transtensional faults in the Ziyang area,central Sichuan Basin,SW China

With drilling and seismic data of Transtensional(strike-slip)Fault System in the Ziyang area of the central Sichuan Basin,SW China plane-section integrated structural interpretation,3-D fault framework model building,fault throw analyzing,and balanced profile restoration,it is pointed out that the transtensional fault system in the Ziyang 3-D seismic survey consists of the northeast-trending F_(I)19 and F_(I)20 fault zones dominated by extensional deformation,as well as 3 sets of northwest-trending en echelon normal faults experienced dextral shear deformation.Among them,the F_(I)19 and F_(I)20 fault zones cut through the Neoproterozoic to Lower Triassic Jialingjiang Formation,presenting a 3-D structure of an“S”-shaped ribbon.And before Permian and during the Early Triassic,the F_(I)19 and F_(I)20 fault zones underwent at least two periods of structural superimposition.Besides,the 3 sets of northwest-trending en echelon normal faults are composed of small normal faults arranged in pairs,with opposite dip directions and partially left-stepped arrangement.And before Permian,they had formed almost,restricting the eastward growth and propagation of the F_(I)19 fault zone.The F_(I)19 and F_(I)20 fault zones communicate multiple sets of source rocks and reservoirs from deep to shallow,and the timing of fault activity matches well with oil and gas generation peaks.If there were favorable Cambrian-Triassic sedimentary facies and reservoirs developing on the local anticlinal belts of both sides of the F_(I)19 and F_(I)20 fault zones,the major reservoirs in this area are expected to achieve breakthroughs in oil and gas exploration.

Prognostic value of circulating tumor cells combined with neutrophil-lymphocyte ratio in patients with hepatocellular carcinoma

BACKGROUND Circulating tumor cell(CTC)count and neutrophil-to-lymphocyte ratio(NLR)are both closely associated with the prognosis of hepatocellular carcinoma(HCC).AIM To investigate the prognostic value of combining these two indicators in HCC.METHODS Clinical data were collected from patients with advanced HCC who received im-mune therapy combined with targeted therapy at the Department of Oncology,the Affiliated Hospital of Southwest Medical University,Sichuan,China,from 2021 to 2023.The optimal cutoff values for CTC programmed death-ligand 1(PD-L1)(+)>1 or CTC PD-L1(+)≤1 and NLR>3.89 or NLR≤3.89 were evaluated using X-Tile software.Patients were categorized into three groups based on CTC PD-L1(+)counts and NLR:CTC-NLR(0),CTC-NLR(1),and CTC-NLR(2).The relationship between CTC-NLR and clinical variables as well as survival rates was assessed.RESULTS Patients with high CTC PD-L1(+)expression or NLR at baseline had shorter median progression-free survival(m-PFS)and median overall survival(mOS)than those with low levels of CTC PD-L1(+)or NLR(P<0.001).Mean-while,patients in the CTC-NLR(2)group showed a significant decrease in mPFS and mOS.Cox regression analysis revealed that alpha-fetoprotein(AFP),CTC PD-L1(+),and CTC-NLR were independent predictors of OS.The time-dependent receiver operating characteristic curve showed that the area under the curve of CTC-NLR at 12 months(0.821)and 18 months(0.821)was superior to that of AFP and CTC PD-L1(+).CONCLUSION HCC patients with high CTC PD-L1(+)or NLR expression tend to exhibit poor prognosis,and a high baseline CTC-NLR score may indicate low survival.CTC-NLR may serve as an effective prognostic indicator for patients with advanced HCC receiving immunotherapy combined with targeted therapy.

Structural attributes,evolution and petroleum geological significances of the Tongnan negative structure in the central Sichuan Basin,SW China

The Tongnan secondary negative structure in central Sichuan Basin has controls and influences on the structural framework and petroleum geological conditions in the Gaoshiti-Moxi area.To clarify the controls and influences,the deformation characteristics,structural attributes and evolution process of the Tongnan negative structure were investigated through a series of qualitative and quantitative methods such as balanced profile restoration,area-depth-strain(ADS)analysis,and structural geometric forward numerical simulation,after comprehensive structural interpretation of high-precision 3D seismic data.The results are obtained in three aspects.First,above and below the P/AnP(Permian/pre-Permian)unconformity,the Tongnan negative structure demonstrates vertical differential structural deformation.It experiences two stages of structural stacking and reworking:extensional depression(from the Sinian Dengying Formation to the Permian),and compressional syncline deformation(after the Jurassic).The multi-phase trishear deformation of the preexisting deep normal faults dominated the extensional depression.The primary depression episodes occurred in the periods from the end of Late Proterozoic to the deposition of the 1st–2nd members of the Dengying Formation,and from the deposition of Lower Cambrian Longwangmiao Formation–Middle–Upper Cambrian until the Ordovician.Second,the multi-stage evolution process of the Tongnan negative structure controlled the oil and gas migration and adjustment and present-day differential gas and water distribution between the Tongnan negative structure and the Gaoshiti and Moxi-Longnüsi structural highs.Third,the Ordovician,which is limitedly distributed in the Tongnan negative structure and is truncated by the P/AnP unconformity on the top,has basic geological conditions for the formation of weathering karst carbonate reservoirs.It is a new petroleum target deserving attention.

川东南石龙峡背斜区奥陶系五峰组页岩顶面现今应力场数值模拟研究

近年来川东南地区页岩气勘探取得重大突破,勘探领域进一步向深层、超深层迈进。受多期构造运动及多套滑脱层影响,川东南地区表现出具有多层滑脱的复杂构造样式,深层现今地应力分布特征存在争议,局部应力场方位变化尚不明确,为深层页岩气开发带来巨大挑战。本文基于钻测井资料和高精度三维地震资料,建立石龙峡背斜地质模型,根据岩石力学参数及边界条件确定研究区力学模型,利用二维有限元数值模拟方法,对石龙峡背斜区奥陶系五峰组页岩顶界面现今应力场分布进行模拟研究。在此基础上,结合研究区石页1井实钻资料对模拟结果的合理性进行验证。研究结果表明:1)石龙峡背斜区现今应力场分布受先存构造、岩石力学差异性等多种因素影响。模拟结果显示在断层带周围,特别是断层带的转折端及末端,表现出应力集中现象,该区域应力值较高,分布范围在-81.85~-80.95 MPa;而断层带本身处于破碎状态,应力值较低,应力分布范围在-77.8~-49.74 MPa;背斜核部为能干性较强区域,处于应力集中状态,应力值较高,应力分布在-113.2~-81.85 MPa。2)石龙峡背斜奥陶系五峰组顶界面现今最大主应力方向呈近南北向展布,主要受控于后期来自大娄山方向的挤压作用影响。川东南地区应力场受多期构造作用叠加,早燕山期主要受控于东部雪峰山弧形构造带的推覆作用等,形成石龙峡背斜构造形态。而现今应力场分布主要受控于晚燕山期—喜马拉雅期来自南侧大娄山推覆的作用,使得现今研究区最大主应力方向呈近南北向。

基于Transformer的深度条件视频压缩

近年来,基于深度学习的视频压缩技术主要基于卷积神经网络(CNN)且采用运动补偿-残差编码的架构,由于常见的CNN只能利用局部的相关性,以及预测残差本身的稀疏特性,难以取得最优压缩性能。因此,提出一种基于Transformer架构的条件视频压缩算法,以实现更优的压缩效果。所提算法基于前后帧之间的运动信息,利用可形变卷积得到对应的预测帧特征;将预测帧特征作为条件信息,对原始输入帧特征进行条件编码,避免了直接编码稀疏的残差信号;利用特征间的非局部相关性,提出一个基于Transformer的深度条件视频压缩编码算法,用来实现运动信息编码和条件编码,进一步提升压缩编码的性能。实验结果表明:所提算法在HEVC、UVG数据集上均超越了当前主流的基于深度学习的视频压缩算法。

黄体酮联合烯丙雌醇片对先兆流产患者的保胎效果分析

目的:分析黄体酮+烯丙雌醇片对先兆流产患者的保胎效果.方法:选择2020年8月至2022年12月本院收治先兆流产患者102例作为研究对象.按照药物方法不同分为观察组(n=53,黄体酮+烯丙雌醇片)和对照组(n=49,烯丙雌醇片).比较两组治疗效果、保胎效果及用药前后性激素及不良反应.结果:观察组临床症状缓解时长、临床症状消失时长及止血时长均显著短于对照组,且阴道流血量低于对照组,差异均有统计学意义(P<0.05).观察组(96.23%)保胎成功率显著高于对照组(83.67%),差异有统计学意义(P<0.05).两组患者孕激素、人体绒毛膜促性腺激素(hCG)及雌二醇水平均显著上升,且观察组患者孕激素、HCG及雌二醇显著高于对照组,差异均有统计学意义(P<0.05).两组不良反应发生率比较,差异无统计学意义(P>0.05).结论:烯丙雌醇片联合黄体酮可缩短临床症状消失时间、降低阴道出血量,可提升保胎效果,具有良好的安全性.

Nonlinear Flux Diffusion and ac Susceptibility in High-T_(c) Superconductors

It is shown that the flux motion in high-T_(c) superconductors can be well consistently analysed by a unified materials equation.The different models of U(J)so far suggested can be shown as specific forms or limits of this unified materials equation.The scaling law of flux pinning derived from this equation agrees with recent experimental observations on high-Jc NdBa2Gu3O7-δsingle crystal.The amplitude dependence of ac susceptibility derived from this equation is compared with several experimental results of high-T_(c) superconductors and a general power law is found.

四川盆地中部高陡断裂构造变形特征与断裂性质

四川盆地中部高陡断裂发育,作为沟通多层系源、储、盖层的核心断层网络,对其构造变形特征的准确理解是认识其油气地质意义的关键,也是准确厘定其断裂性质的基础。本研究利用高精度三维连片资料,通过精细的层面、剖面综合构造解析,对川中地区高陡断裂的构造变形特征进行了准确厘定,对其断裂性质展开了深入探讨,得出如下结论:1)川中地区的高陡断裂,不论NWW-SEE向(或近E-W向)还是NE-SW向,不论Ⅰ级、Ⅱ级还是Ⅲ级,均具有显著的伸展变形分量。在剖面上,这些断裂产状陡直,呈板状斜列分布,具有正断层的一系列变形特征。2)证实川中地区的FI5、FI6、FI7、FI8、FI9及FNE01等主要断裂带存在走滑变形,且剪切变形机制均为右旋剪切。3)明确川中地区的大部分高陡断裂是加里东—海西早期发育并定型,部分在海西晚期—印支期复活的“右行张扭走滑断裂”。

四川盆地构造沉降特征及成因机制分析

盆地的沉降过程能够反映盆地的演化历史及成盆机制。为深入分析四川盆地构造沉降特征,本文基于最新钻井资料和地震数据,通过回剥反演方法,进行去压实、沉积负载、古水深和海平面变化校正,重建了四川盆地不同构造单元的构造沉降史。同时根据瞬时均匀伸展模型和裂后热坳陷模型进行正演模拟,对盆地成因进行分析。构造沉降史的恢复揭示了四川盆地具有典型的克拉通盆地沉降特征。四川盆地的形成演化可划分为震旦纪—早古生代、石炭纪—三叠纪、侏罗纪—白垩纪3个构造沉降旋回,盆地经历了晚震旦世—早寒武世、早志留世、晚二叠世—早三叠世以及中晚侏罗世4幕快速沉降,第一幕和第三幕快速沉降期为岩石圈伸展减薄引起,另外两幕为前陆盆地发育过程中所引起的快速沉降。构造沉降正演结果表明四川盆地在寒武纪—奥陶纪和晚二叠世—三叠纪经历了两期“快速沉降—缓慢沉降”过程,快速沉降受控于岩石圈的伸展作用,缓慢沉降为岩石圈热冷却作用所主导。盆地在热冷却沉降阶段后进入前陆挠曲沉降,出现不同规模的剩余沉降。

超固结比对合肥硬黏土剪胀特性的影响研究

为了定量探讨超固结比(overconsolidation ratio,OCR)对合肥硬黏土剪胀性的影响,文章对合肥地区原状硬黏土进行三轴剪胀试验,并与重塑土试验结果进行对照;制备超固结比分别为1、2、4、8的重塑土进行三轴对比试验。结果表明:OCR为2.70~4.68的原状土,其最大体积剪胀率为1.1%~3.0%,在一定范围内,OCR与最大体积剪胀率呈抛物线关系;重塑土与同深度原状土相比,最大体积剪胀率降低33.3%~36.4%,且部分土样出现先剪缩后剪胀的现象;与原状土相比,OCR越大,重塑土的剪胀性降低程度越大,重塑土样的最大体积剪胀率降低5%~51%,在一定范围内,重塑土OCR与最大体积剪胀率之间存在较强线性关系。

Tuning Lithiophilicity and Stability of 3D Conductive Scaffold via Covalent Ag-S Bond for High-Performance Lithium Metal Anode

Li metal anode holds great promise to realize high-energy battery systems.However,the safety issue and limited lifetime caused by the uncontrollable growth of Li dendrites hinder its commercial application.Herein,an interlayer-bridged 3D lithiophilic rGO-Ag-S-CNT composite is proposed to guide uniform and stable Li plating/stripping.The 3D lithiophilic rGO-Ag-S-CNT host is fabricated by incorporating Ag-modified reduced graphene oxide(rGO)with S-doped carbon nanotube(CNT),where the rGO and CNT are closely connected via robust Ag-S covalent bond.This strong Ag-S bond could enhance the structural stability and electrical connection between rGO and CNT,significantly improving the electrochemical kinetics and uniformity of current distribution.Moreover,density functional theory calculation indicates that the introduction of Ag-S bond could further boost the binding energy between Ag and Li,which promotes homogeneous Li nucleation and growth.Consequently,the rGO-Ag-S-CNT-based anode achieves a lower overpotential(7.3 mV at 0.5 mA cm^(−2)),higher Coulombic efficiency(98.1%at 0.5 mA cm^(−2)),and superior long cycling performance(over 500 cycles at 2 mA cm−2)as compared with the rGO-Ag-CNT-and rGO-CNT-based anodes.This work provides a universal avenue and guidance to build a robust Li metal host via constructing a strong covalent bond,effectively suppressing the Li dendrites growth to prompt the development of Li metal battery.

Role and Effects of Eucommia ulmoides Leaves in the Growth Process of Livestock and Poultry

Substitutes of feed antibiotics have been a key research topic in the new stage of animal husbandry.Chinese veterinary medicine refers to decoction pieces and their preparations processed from natural plants,animals,and minerals and used for animal disease prevention and improvement of animal production performance under the guidance of Chinese veterinary pharmacy theory.Eucommia ulmoides leaf extract has many active functional components such as chlorogenic acid,E.ulmoides polysaccharides and flavonoids,which have many biological properties such as antibacterial,antioxidant,immune-regulation,sugar ester-and bone metabolism-regulation effects.This paper explored active ingredients and biological properties of E.ulmoides leaf extract,as well as its role and effects in livestock and poultry breeding,providing a scientific basis for the use of E.ulmoides leaves in livestock and poultry breeding.

Physical Prediction Model of Compound Hydrodynamic Unload-Load Response Ratio and Its Application in Reservoir Colluvium Landslide

It is well known that the deformation and damage of reservoir colluvium landslides are often determined by the combined dynamics of reservoir water level change and rainfall.Based on the systematic analysis of the change law of reservoir water level,rainfall and displacements of reservoir colluvium landslide,this paper proposes the compound hydrodynamic action of rainfall and reservoir water as the unload-load parameter,and the landslide displacement as the unload-load response parameter.Based on this,a physical prediction model of the compound hydrodynamic unload-load response ratio of reservoir colluvium landslide was established,and the quantitative relationship between the compound hydrodynamic unload-load response ratio and its stability evolution was in-depth analyzed and determined.On the basis of the above research,taking Shuping landslide,a typical hydrodynamic pressure landslide as an example,the unload-load response ratio model is used to systematically evaluate and predict the stability evolution law and the change trend of the landslide under compound hydrodynamic action.The prediction result shows that the variation law of the compound hydrodynamic unload-load response ratio is consistent with the dynamic evolution law of its stability.Therefore,the above studies show that the compound hydrodynamic unload-load response ratio parameter is an effective displacement dynamic evaluation parameter for reservoir colluvium landslides,so it can be used in the prediction of the reservoir colluvium landslides.

一种高压运算放大器的设计

基于混合集成电路工艺,采用氧化铍衬底厚膜电路、陶瓷电容和半导体芯片,设计了一种高压运算放大器。采用ORCAD进行仿真,结果表明,该运放的供电电压为±15~±150V,输出电流为75mA,直流电压增益为95dB,转换速率为57V/μs,静态电流6 mA,单位增益带宽3MHz。该运放可被广泛用于马达控制系统、压电传感器以及打印机驱动等领域,实现了高压运算放大器的国产化。

基于物联网与云计算的居民电子健康档案系统设计研究

居民电子健康档案系统是通过记录人们在健康活动中形成的信息资源,支持用户进行健康管理和评估的电子化应用.文章介绍了居民电子健康档案系统在国内外的发展现状与前景;从数据处理过程的维度分析了数据采集与获取、数据处理与存储、数据分析与应用三个功能模块;论述了包含硬件设施层、数据处理层、业务处理层、应用服务层和用户接口层五个层次的逻辑架构;总结了系统建设用到的物联网、云计算、数据挖掘、网络传输、信息安全等互联网技术.

应用放射组学和剂量学特征预测食管癌放射治疗后的两年生存情况

目的:使用放射组学与剂量学特征参数,建立机器学习预测模型,预测食管癌患者放射治疗后两年的生存情况。方法:回顾性分析2013年1月至2017年12月在天津医科大学肿瘤医院接受放射治疗的食管癌患者共579例。从食管癌患者的放射治疗计划中提取GTV的放射组学和剂量学的特征,使用最大相关最小冗余与人工方法对特征参数进行筛选,分别选取14项放射组学和14项剂量学特征,并将特征变量进行标准化归一至[0,1]范围。建立支持向量机、逻辑回归和随机森林等机器学习模型,先使用14项放射组学特征,再使用28项放射组学和剂量学混合特征参数进行训练和测试,来预测食管癌放射治疗患者的两年生存情况。结果:仅使用放射组学特征预测放射治疗后两年生存情况时,支持向量机、逻辑回归和随机森林模型的准确率分别为84.98%、85.92%和84.51%。使用放射组学和剂量学的混合特征参数进行预测时,支持向量机、逻辑回归和随机森林模型的准确率分别为86.32%、83.02%和90.01%。在放射组学特征参数基础上,增加剂量学特征,支持向量机和随机森林模型的预测准确性得到有效提高。结论:针对支持向量机和随机森林模型,使用放射组学和放射治疗剂量学特征参数放射治疗,可有效提高对食管癌患者放射治疗后两年生存情况预测评估的准确性。

埋入式超声传感器混凝土测强曲线研究

采用可埋入的超声压电传感器与商用超声检测仪相连,测试了不同强度等级装配式建筑梁板柱节点处的混凝土在不同龄期的强度与波速,建立了埋入式传感器专用测强曲线,并与传统方法进行了对比,验证了传感器的测试精确度。结果表明,埋入式自制传感器与传统传感器测试数据吻合度高,相同强度下两者测强曲线拟合相关系数接近1,平均相对误差满足规范中小于12%的要求。埋入式自制传感器可与现有超声测试技术兼容,有效地对缺少操作面及复杂的构件进行强度检测。

基于Arduino和Android平台的智能小车语音交互系统设计

随着物联网的快速发展,物联网生态系统逐步形成,通过设计与物联网云平台的数据交互,可以增加设计的灵活性以及降低硬件成本。本文提出了基于Arduino和Android平台实现语音交互的声控智能小车,该小车以Arduino UNO R3开发板为控制系统、通过Android Studio编写手机终端语音识别App、阿里云平台提供云语音识别技术。通过ESP8266 WiFi模块的中继功能,阿里云平台与手机终端App的数据交互发送到Arduino中。此外,L298N直流电机驱动模块通过Arduino IDE编程驱动L298N模块控制直流电机转动速度和方向,最终实现非特定语音对智能小车前进、后退、转弯、加减速等控制。

高度近视患者SMILE和FS-LASIK术后早期视觉质量的比较

目的:应用双通道视觉质量分析系统(OQASⅡ)及Pentacam角膜地形图对比研究高度近视患者分别行小切口飞秒激光角膜基质透镜取出术(SMILE)和飞秒激光辅助制瓣的准分子激光原位角膜磨镶术(FS-LASIK)后早期视觉质量的变化。方法:前瞻性非随机对照研究。选取2020-03/09于我院行手术矫治的高度近视患者74例148眼,其中SMILE组43例86眼,FS-LASIK组31例62眼。分析患者术前、术后1、7d裸眼视力(UCVA)、调制传递函数截止频率(MTF cut off)、斯特列尔比值(SR)、客观散射指数(OSI)、模拟对比度视力(VA 100%、VA 20%、VA 9%)、高阶像差(HOA)、水平彗差(Z_(3)^(1))、垂直彗差(Z_(3)^(-1))和球差(Z_(4)^(0))情况。结果:两组患者术前年龄、等效球镜、UCVA、MTF cut off、SR、OSI、VA 100%、VA 20%、VA 9%、HOA、Z_(3)^(1)、Z_(3)^(-1)和Z_(4)^(0)均无差异(P>0.05)。SMILE组术后1d OSI值高于FS-LASIK组(2.3±2.1 vs 1.8±1.1),术后7d无差异(1.2±0.7 vs1.3±0.7)。FS-LASIK组术后1、7d HOA和Z_(4)^(0)均高于SMILE组(P<0.001),但术后1、7d两组患者UCVA、Z_(3)^(1)、Z_(3)^(-1)、MTF cut off、SR、VA 100%、VA 20%、VA 9%均无差异(P>0.05)。结论:FS-LASIK术后早期更易引入角膜高阶像差和球差,而2mm切口的SMILE术仅在术后1d引入更高的散射,因此,高度近视患者行角膜屈光手术矫正采用SMILE术较FS-LASIK术后早期能够获得更佳的视觉质量。

大数据挖掘中的MapReduce并行聚类优化算法研究

针对传统数据挖掘算法只适用于小规模数据挖掘处理,由于数据规模不断增大,其存在计算效率低、内存不足等问题,文中将MapReduce用于数据挖掘领域,对大数据挖掘中的MapReduce进行了并行化改进,并设计相应的并行化实现模型,以期满足大数据分析需求,完成低成本、高性能的数据并行挖掘与处理。