Response of environmental sensitive grain size group in Core FJ04 from mud area in the north of East China Sea to East Asian winter monsoon evolvement

AMS14C dating and grain-size analysis for Core FJ04, located at mud area in the North of East China Sea provide us a high-resolution grain-size distribution curve varying with depth and time. This paper got environmental sensitive grain-size group by using standard deviation method, and proved that the selected sensitive grain-size group is an important proxy which can be used to reconstruct intensity of East Asian Winter Monsoon （EAWM）. Then we got reconstruction of EAWM evolvement since 3 ka B.P., which revealed two main phases： （1） 3 - 1.15ka B.P., relative weak EAWM with middle frequency fluctuation; （2） 1.15 - 0ka B.P., really strong EAWM with high frequency fluctuation. And 1.15 ka B.P. is a distinct turning point. During the whole period, 11 intense events of EAWM were recorded and correlated well with other climate records, but the response extent was different, which showed consistency of climate change and particularity of region response.

Study on Conceptual Planning of Group Landscapes in Urban Core Areas—A Case Study of Conceptual Landscape Planning of the Core Area in Shuangsong Group,Wanzhou District of Chongqing City,China

The planning site was divided into a spatial structure of"one center,one corridor,two axes,two belts and three communities"and traffic system designed to a 3-grade road system of"artery,secondary artery and by-pass".Meanwhile,a 3-ring structure of the planning site was constructed:diffusion waterfront landscape belt,waterfront pathway and core eco-green island.Finally,the planning concepts for major ecological constructions were given.This study tried to explore the group eco-landscape pattern in urban core areas so as to provide a strategic instruction for the regional sustainable development.

Numerical analysis of stability for mined-out area in multi-field coupling

There were differences between real boundary and blast hole controlling boundary of irregular mined-out area in underground metal mines. There were errors in numerical analysis of stability for goaf, if it was analyzed as regular 3D mined-out area and the influence of coupling stress-seepage-disturbance was not considered adequately. Taking a lead zinc mine as the background, the model was built by the coupling of Surpac and Midas-Gts based on the goaf model precisely measured by CMS.According to seepage stress fundamental equations based on the equivalent continuum mechanical and the theory about equivalent load of dynamic disturbance in deep-hole blasting, the stability of mined-out area under multi-field coupling of stress-seepage-dynamic disturbance was numerically analyzed. The results show that it is more consistent between the numerical analysis model based on the real model of irregular 3D shape goaf and the real situation, which could faithfully reappear the change rule of stress–strain about the surrounding rock under synthetic action of blasting dynamic loading and the seepage pressure. The mined-out area multi-field coupling formed by blasting excavation is stable. Based on combination of the advantages of the CMS,Surpac and Midas-Gts, and fully consideration of the effects of multi-field coupling, the accurate and effective way could be provided for numerical analysis of stability for mined-out area.

Numerical simulation for influence of excavation and blasting vibration on stability of mined-out area

Dynamic analysis steps and general flow of fast lagrangian analysis of continua in 3 dimensions(FLAC3D) were discussed. Numerical simulation for influence of excavation and blasting vibration on stability of mined-out area was carried out with FLAC3D. The whole analytical process was divided into two steps, including the static analysis and the dynamic analysis which were used to simulate the influence of excavation process and blasting vibration respectively. The results show that the shape of right upper boundary is extremely irregular after excavation, and stress concentration occurs at many places and higher tensile stress appears. The maximum tensile stress is higher than the tensile strength of rock mass, and surrounding rock of right roof will be damaged with tension fracture. The maximum displacement of surrounding rock is 4.75 mm after excavation. However, the maximum displacement increases to 5.47 mm after the blasting dynamic load is applied. And the covering area of plastic zones expands obviously, especially at the foot of right upper slope. The analytical results are in basic accordance with the observed results on the whole. Damage and disturbance on surrounding rock to some degree are caused by excavation, while blasting dynamic load increases the possibility of occurrence of dynamic instability and destruction further. So the effective supporting and vibration reducing measures should be taken during mining.

Instability identification on large scale underground mined-out area in the metal mine based on the improved FRBFNN

To identify the instability on large scale underground mined-out area in the metal mine effectively,the parameters of radial basis function were determined through clustering method and the improved fuzzy radial basis function neural network(FRBFNN)model of instability identification model about large scale underground mined-out area in the metal mine was built.The improved FRBFNN model was trained and tested.The results show that the improved FRBFNN model has high training accuracy and generalization ability.Parameters such as pillar area ratio,filling level and the value of rock quality designation have strong influence on instability of large scale underground mined-out area.Correctness of analysis about the improved FRBFNN model was proved by the practical application results about instability discrimination of surrounding rock in large-scale underground mined-out area of a metal mine in south China.

Quantitative analysis of biotechnical reinforcement for a steep slope consisting of composite coal-gangue-soil medium adjacent to a mined-out area

The engineering and geological characteristics of a steep slope consisting of coal gangue, rock and soil medium in Huating coal mine have been comprehensively investigated. Owing to humid weather, heavy rainfall, vegetation and porous characteristics of the soil and rock mass, the steep slope will be destabilized and induce mud-rock flow or derive hazard easily. Firstly, based on the classical slope reinforcement theory, some regularity between the shear and displacement in the destabilized zone of the slope with or without root strength contribution is presented. Then, based on the experimental and statistical analysis of root strength, hydrological characteristics and stability status, etc., some possible biotechnical techniques for reinforcement of the steep slope have been suggested. These methods are important for quantitative analysis of destabilization of the slope and design of the biotechnical reinforcement.

Time function of surface subsidence based on Harris model in mined-out area

The surface subsidence is a common environmental hazard in mined-out area. Based on careful analysis of the regularity of surface subsidence in mined-out area, we proposed a new time function based on Harris curve model in consideration of the shortage of current surface subsidence time functions. By analyzing the characteristics of the new time function, we found that it could meet the dynamic process, the velocity change process and the acceleration change process during surface subsidence. Then its rationality had been verified through project cases. The results show that the proposed time function model can give a good reflection of the regularity of surface subsidence in mined-out area and can accurately predict surface subsidence. And the prediction data of the model are a little greater than measured data on condition of proper measured data quantity, which is safety in the engineering. This model provides a new method for the analysis of surface subsidence in mined-out area and reference for future prediction, and it is valuable to engineering application.

农村扩中群体的家庭财务报表识别机制研究:基于浙江共同富裕先行示范区的实践探索

基于家庭财务报表构建扩中群体识别机制对提高财政支持政策的精准性、加快实现共同富裕具有重要意义。在厘清浙江省现有扩中群体识别机制构建取得的进展与存在的不足的基础上,梳理农业经营主体家庭财务报表的编制探索、应用进展及对扩中群体识别的启示,进而提出基于家庭财务报表改进扩中群体识别指标的思路和完善识别机制的建议。分析表明,现有实践从财产、社保、职业、收入等维度构建相对富裕群体的识别指标体系并运用排除法锁定扩中群体有其合理性和推广价值,但还面临标准设置权威性与精准性欠佳、指标选取不足、缺乏动态修正机制等挑战。浙江省农业融资担保有限公司探索编制了农业经营主体家庭财务报表,对完善扩中群体识别机制产生有益启发。基于家庭财务报表识别扩中群体存在关键收入与支出数据缺乏、资产价值评估标准难统一、线下数据采集质量不高、数据动态更新与共享机制滞后等不足。鉴于此,从排除法指标调整、修正类指标补充和直接类指标拣选3个方面提出改进扩中群体识别的可能思路,并从完善农村家庭财务报表设计、改进家庭结构画像和经济画像规则、强化数字化支撑、完善配套支撑机制等方面提出政策建议。

姬塬地区长8油层组储层特征分析

为确定长8油层储层现今表征,储层物性受黏土矿物胶结物控制模式,储层沉积作用和沉积后期所经历的成岩变化,通过铸体薄片、扫描电镜等方法研究了储层基本特征和成岩作用及沉积作用,在整体低渗的背景下,部分位于相对渗透率较高区域的油井有较高的产量,理清研究区长8储层富集规律,对地区内岩石孔隙度下降因素进行剖析。结果表明,姬塬地区有利储层多发育水下分流河道和河口坝沉积,特别是砂体中心部位储层物性是最好,可见长8油层组的储集性能和渗流性能好,即粒间孔型、粒间孔+溶孔型和溶孔+粒间孔型。溶孔型、粒间孔+微孔型两种孔隙组合类型的渗流性能较差。微孔型和溶孔+微孔型两种孔隙组合类型的储集空间主要由半径极小的微孔构成,连通性较差,其孔隙内表面积和渗流阻力,储集性能和渗流性能较差。

潍坊地区患者ABO血型鉴定困难原因分析

目的:探讨分析潍坊地区患者ABO血型鉴定困难原因,解决疑难输血问题。方法:应用全自动血型分析仪对2020年12月-2023年10月潍坊地区239388例患者血型标本进行ABO血型初检,正反定型不符的标本加做试管法+镜检、不规则抗体筛查等实验,仍无法确定血型的,应用PCR-SSP法检测ABO血型基因,SSP荧光PCR染料法鉴定血型亚型,必要时进行Sanger基因序列分析。结果:239388份标本检出正反不符标本248份,研究分析结果为:①ABO亚型所致95例(4.0/万),其中B基因发生突变频率(65/95)明显高于A基因(28/95);②抗原减弱所致94例(3.9/万),其中B抗原表达减弱(62/94)比A抗原减弱(29/94)更常见;③不规则抗体阳性所致34例(1.4/万),其中抗M抗体(25/34)检出率最高;④反定型抗体减弱/缺失所致25例(1.0/万),其中抗B抗体减弱或缺失(22/25)最常见。结论:血清学与分子生物学结合可以准确鉴定患者血型,有效解决患者血型鉴定困难导致的疑难输血问题。

准噶尔盆地卡姆斯特地区石树沟群砂岩地球化学特征及其对源岩的指示

为揭示卡姆斯特地区石树沟群的源岩性质和构造背景,探讨其对砂岩型铀成矿作用的影响,对该区的石树沟群砂岩开展了岩石学及地球化学研究。结果表明,石树沟群砂岩以岩屑砂岩为主,成熟度低,富集Cs、U、Cr、Hf,亏损Nb、Ta、Th;整体具轻稀土富集、重稀土亏损、Eu负异常特征,与卡拉麦里造山带中酸性岩浆岩稀土元素特征具有相似性;沉积物源为卡拉麦里造山带,源岩主要为富铀的中酸性岩浆岩,形成构造背景为活动大陆边缘-大陆岛弧环境。石树沟群的源岩为砂岩型铀成矿提供了物质来源。

边境民族地区中国式现代化成效与经验——以西藏勒布沟地区为例

我国边境民族地区是全面推进中国式现代化的重要着力点。以西藏错那市勒布沟地区四个门巴民族乡为研究个案,通过梳理勒布沟地区推进中国式现代化的具体成效,即经济跨越式发展、民主政治制度不断完善、精神生活日益富足、社会保障不断健全、生态保护成效显著,总结边境民族地区推进中国式现代化的经验,要以经济、政治、文化、社会、生态“五位一体”为统领,同时坚持外源性动力与内源性动力协同作用,注重现代化建设与守边固边工作双向互促。

甘肃省某三甲医院医疗服务能力评价及改进措施探析

目的基于疾病诊断相关分组(diagnosis-related groups,DRGs)应用过程的研究,评价甘肃省某三级甲等综合医院的医疗服务能力。方法收集作者医院2019-01-01/2021-12-31日住院病案首页数据,对DRGs指标数据进行对比分析,依据“二八原则”以相对权重(relativeweight,RW)和出院人次将全院734个DRGs组划分成优势病种区、核心病种区、重点病种区、普通病种区、提升病种区和下沉病种区,分析各科室病种分区情况。结果该医院总体病例组合指数(case-mixindex,CMI)呈略微下降趋势,出院人数增幅较大,2021年较2019年上升了10.73%,总手术占比、四级手术占比及微创手术占比分别上升了6.56%、3.62%、0.71%;时间消耗指数均<1且持续降低,药耗费用有所增加;有68.31%的出院患者均集中在RW<1的DRGs组;优势病种区和核心病种区各包括30和148个DRGs组,总体CMI分别为2.288和2.539,均处于较高水平;重点病种区和普通病种区各包括90和261个DRGs组,总体CMI相对较低,分别为0.837和0.800;提升病种区和下沉病种区各包括13和63个DRGs组,总体CMI分别为0.303和0.317,均处于较低水平。结论该院的医疗服务能力有所提升,但医疗服务效率有待改善。根据病种分区结果,进一步优化全院病种结构,增加优势病种、核心病种等高权重病种的患者收治比例。以目标值为导向,按月度开展DRGs病种分析和对比,逐步提升全院整体医疗服务能力,为患者提供更加优质的医疗服务。

“双高计划”背景下“都市蔬菜生产”课程改革的实施路径

在“双高计划”背景下,探讨如何对专业群核心课程进行构建与实施,从而提高人才培养的质量和效果。“都市蔬菜生产”课程从都市蔬菜就业岗位群出发,结合产业技术发展及企业需求,通过重构课程内容、修订课程标准、创建思政链条、完善课程资源、升级教学条件、改进评价方法等方面展开探索,构建了“2条主线,3多评价、4种能力、5个环节”为核心的“2345”教学模式,有利于培养新时代“一懂两爱”的农业工作者,对涉农专业课程改革具有示范作用和借鉴意义。

襄阳都市圈旅游一体化发展路径研究

中国式现代化和新发展格局对区域旅游一体化提出了新的要求。旅游一体化是城市一体化的重要组成部分,襄阳都市圈旅游一体化发展问题要立足汉江流域、南襄盆地、中西部新通道的大格局来分析,最为关键的就是“襄十随神”城市群旅游一体化。襄阳都市圈各城市地域相接、交通相连、文脉相通,共饮一江汉水,旅游一体化基础良好。围绕五大主题游线,重点做好增加旅游一体化合作收益、拓展襄阳旅游中心城市功能、谋划城市群旅游新格局、丰富城市群旅游形象和业态等方面的工作。

海孜煤矿深部勘查区中组煤层气储层物性特征分析

【目的】煤层气储层的物性特征是进行煤层气开发研究的关键因子。【方法】重点对海孜煤矿深部勘探区域中组煤储层的物性参数进行调查,以对井田内中组煤储层物性特征进行研究。【结果】研究表明,煤层的物性特征适宜开采,其中有机显微组分占优,无机显微组分次之。该煤层含气量多,虽然煤层渗透率相对较小,但符合煤层气开采条件。煤层开采时的吸附作用一般,但有利于煤层气储集和缩短煤层气的开发周期。【结论】研究结果可为该研究区煤层气抽采提供可靠的技术参考。

边境“直过民族”地区小学教师环境教育实施现状研究——以云南省沧源佤族自治县为例

云南“直过民族”地区是我国西南边陲的重要绿色屏障,当地教师的环境教育能力对于推进生态文明建设起着至关重要的作用。本研究以“直过民族”地区小学教师为研究对象,采用问卷调查的方式,调查了教师的环境教育意识和能力。研究发现,当地教师的环境教育能力存在以下问题:对环境的关注较弱,对环境教育存在认识偏差,环境教育方法单一且实践不足。针对这些问题,本研究从“直过民族”地区的历史发展和现阶段的教育情况出发,对当地教师环境教育问题的形成原因进行了针对性的讨论,并提出以下建议:一是利用文化赋能推进环境教育本土化;二是优化当地教师环境教育培训内容和形式;三是优化环境教育资源配置,扩大社会参与和合作。本研究期望所发现的问题和提出的建议对我国其他“直过民族”或少数民族地区的环境教育实施具有一定的启示作用。

二十世纪五六十年代湖北青壮年支援新疆建设述略

二十世纪五六十年代,湖北支边青壮年响应国家号召,支援新疆社会主义建设。经过宣传动员、审核批准、分配安置和教育巩固等工作,先后有94421名支边青壮年和21757名家属进疆,他们不仅是新疆工农业战线上的生力军,而且带来了先进的生产经验和科学技术,增进了各民族的交往交流交融。这不仅为新时期做好对口援疆工作提供重要的借鉴,而且为现实维度的铸牢中华民族共同体意识提供了可感知的示范价值和鲜活案例。

基于多机场终端区交通态势的航班延误预测

为了针对性地制定后续优化措施,以降低多机场终端区内航班延误所带来的不利影响,并提高多机场系统内各机场的运营效率,进行多机场终端区航班延误的预测研究。首先,考虑多机场终端区交通态势对航班延误的影响,在对多机场终端区交通态势进行分析的基础上,建立6个描述终端区交通态势的指标。接着,构建反向传播(back propagation,BP)神经网络航班延误预测模型,将终端区交通态势指标、航班信息和天气环境数据等作为输入,航班延误时间作为输出,并利用粒子群优化算法(particle swarm optimization,PSO)优化BP神经网络进行训练。通过实例验证和分析,基于多机场终端区交通态势的航班延误预测能够有效提高预测准确率,同时,通过粒子群优化BP神经网络的预测模型预测准确率均高于一般的考虑交通态势的BP和遗传算法优化的BP神经网络模型(genetic algorithm and back propagation,GA-BP)。

划片区组长负责制能级对应分层管理模式在急诊护理管理中的应用价值

目的研究划片区组长负责制能级对应分层管理模式在急诊护理管理中的应用价值。方法选取我院41名急诊科护理人员为研究对象,其中2020年1月至2022年1月采用常规急诊护理管理(n=41,管理前),2022年2月至2023年1月采用划片区组长负责制能级对应分层管理模式(n=41,管理后)。选择同期我院急诊科收治的80例患者的临床资料开展回顾性分析,其中2020年1月至2022年1月纳入40例患者,2022年2月至2023年1月纳入40例患者。比较管理前、后的护理不良事件发生率、护理质量、护士人文素质及患者安全胜任力。结果管理后的护理不良事件总发生率为5.00%,低于管理前的20.00%(P<0.05)。管理后的病区管理、护士工作能力、护士形象、护理服务态度、健康教育评分及总分均高于管理前(P<0.05)。管理后的职业道德素质、文化素质、法律素质、审美素质、心理素质评分及总分高于管理前(P<0.05)。管理后的知识因素、系统因素、态度因素、技能因素评分及总分高于管理前(P<0.05)。结论划片区组长负责制能级对应分层管理模式在急诊护理管理中的应用价值显著,可降低护理不良事件发生率,提高护理质量,提升护理人员的人文素质,值得推广。