Mechanical properties and damage evolution characteristics of waste tire steel fiber-modified cemented paste backfill

During the process of constructional backfill mining,the cemented paste backfill(CPB)typically exhibits a high degree of brittleness and limited resistance to failure.In this study,the mechanical and damage evolution characteristics of waste tire steel fiber(WTSF)-modified CPB were studied through uniaxial compression tests,acoustic emission(AE)tests,and scanning electron microscopy(SEM).The results showed that the uniaxial compressive strength(UCS)decreased when the WTSF content was 0.5%,1%,and 1.5%.When the WTSF content reached 1%,the UCS of the modified CPB exhibited a minimal decrease(0.37 MPa)compared to that without WTSF.When the WTSF content was 0.5%,1%,and 1.5%,peak strain of the WTSF-modified CPB increased by 18%,31.33%,and 81.33%,while the elastic modulus decreased by 21.31%,26.21%,and 45.42%,respectively.The addition of WTSF enhances the activity of AE events in the modified CPB,resulting in a slower progression of the entire failure process.After the failure,the modified CPB retained a certain level of load-bearing capacity.Generally,the failure of the CPB was dominated by tensile cracks.After the addition of WTSF,a gradual increase in the proportion of tensile cracks was observed upon loading the modified CPB sample to the pore compaction stage.The three-dimensional localization of AE events showed that the WTSF-modified CPB underwent progressive damage during the loading,and the samples still showed good integrity after failure.Additionally,the response relationship between energy evolution and damage development of WTSF-modified CPB during uniaxial compression was analyzed,and the damage constitutive model of CPB samples with different WTSF contents was constructed.This study provides a theoretical basis for the enhancement of CPB modified by adding WTSF,serving as a valuable reference for the design of CPB constructional backfill.

Empowering the Future: Exploring the Construction and Characteristics of Lithium-Ion Batteries

Lithium element has attracted remarkable attraction for energy storage devices, over the past 30 years. Lithium is a light element and exhibits the low atomic number 3, just after hydrogen and helium in the periodic table. The lithium atom has a strong tendency to release one electron and constitute a positive charge, as Li . Initially, lithium metal was employed as a negative electrode, which released electrons. However, it was observed that its structure changed after the repetition of charge-discharge cycles. To remedy this, the cathode mainly consisted of layer metal oxide and olive, e.g., cobalt oxide, LiFePO4, etc., along with some contents of lithium, while the anode was assembled by graphite and silicon, etc. Moreover, the electrolyte was prepared using the lithium salt in a suitable solvent to attain a greater concentration of lithium ions. Owing to the lithium ions’ role, the battery’s name was mentioned as a lithium-ion battery. Herein, the presented work describes the working and operational mechanism of the lithium-ion battery. Further, the lithium-ion batteries’ general view and future prospects have also been elaborated.

Construction controlling and strength increasing characteristics of locally developed epoxy asphalt mixture

The construction controlling elements,including construction performance at low ambient temperatures,reserved time ranges,and the strength increasing rule,for locally developed epoxy asphalt mixture（LDEAM） are studied through laboratory tests.Air void and Marshall stability are chosen as the performance measures for evaluating the construction quality.The wheel rolling test is used to simulate the actual construction situations,while the Marshall test and the Brookfield viscosity test are adopted to study the strength increasing rule.The experimental results reveal that the LDEAM can be constructed under a low ambient temperature condition of 10℃,and its longest reserved time is 70 min at a reserved temperature of 120℃.Test also shows that the strength of the LDEAM increases with time and temperature before cured.Finally,the theoretical reason for the strength increasing rule is analyzed on the basis of the organic chemistry theory.

Analysis on Regional Characteristics of Dangjia Village in Hancheng City of China

By using cross-disciplines research method,deep survey and analysis had been conducted on residences of Dangjia Village in Hancheng City from four aspects which were spatial factors,spatial organization,decoration pattern and regional creation technology.In terms of spatial factors,courtyards,halls and wing-rooms had been studied;in terms of spatial organization,lane spaces and combination of courtyards had been emphasized;in terms of decoration pattern,stone carving decoration,brick carving decoration and wood carving decoration had been highlighted;in terms of creation technology,analysis had been conducted on structure,materials and structural features,so as to reveal regional characteristics of traditional residences at this area.During analysis process,it emphasized that traditional architectural style of Dangjia Village formed in certain historical condition.With the change of society,economy and culture,it should fully respect and inherit traditional architectural form,and utilize new materials,new technology,new structure and new creative measures during new countryside construction,so as to construct architectures inheriting and manifesting regional characteristics.

Population Construction and Super-high Yield Characteristics of Japonica Super Rice in Cold Regions

[Objective] This study was conducted to construct a super-high yield population of Japnica rice in cold regions of North China and to explore its characteristics. [Method] The super rice variety Longjing 21 was selected as the experimental material. Different row spacing（two levels）, plant spacing（three levels） and seedling number per hill（three levels） were designed in field trials. Then, the growth stages,dry matter accumulation, leaf area, yield and yield components of these different treatments were measured. [Result] Rice yield had significantly negative correlation with plant spacing and row spacing, but no significant correlation with seedling number per hill. Rice yield was mainly affected by plant spacing, and less affected by seedling number per hill. The best recommended specifications for plant spacing of super rice variety Longjing 21 were 24 cm for row spacing, 12 cm for plant spacing and five seedlings per hill, and the expected yield was 10 473.0 kg/hm^2.The increased number of total spikelets（4.5×108hm2or more） in populations was the major reason for high yield. Super-high yield populations had fewer tillers at the early growth stage and achieved the expected number of productive tillers at critical leaf-age（June 25）, and tiller number peaked at jointing stage（July 6） and was about 1.2 times of the expected number. The percentage of productive tillers in total tillers of super-high yield population was more than 85% at heading stage. At middle growth stage（from jointing to heading stage）, the dry matter accumulation, leaf area index（LAI） at heading stage, effective leaf area, spikelet number of population,spikelet number per leaf area unit（cm2）, and culm-sheath weight per stem of super-high yield population were significantly higher than those of other populations.At late growth stage（from heading to maturity stage）, the leaf area decreasing rate of super-high yield population was significantly smaller than that of other populations. At late growth stage（from heading to maturity stage）, the leaf area decreasing rate, crop growth rate, net assimilation rate, biomass accumulation, number of filled grains per leaf area unit（cm^2） and grain weight per leaf area unit（cm^2） of high-yield population were significantly higher than those of other populations. Output and translocation of dry matter（weight per stem and sheath and total filling rate at maturity） from heading to milky stage of super-high yield population were significantly higher than those of other populations. [Conclusion] The characteristics of superhigh yield rice in cold region of North China are enriching the amount of actual filling of sink through improving photosynthetic efficiency from heading to maturity stage on the basis of enough panicle numbers.

Characteristics and Construction Technology Analysis of Static Pressure Prestressed Pipe Piles in Construction Engineering

The development of urbanization has led to an increase in the number and scale of construction projects and the types of building construction engineering are getting advance and diverse due to the rapid development of technology.One of them is the static pressure prestressed pipe pile which is the most commonly used technology in modern building construction work.It is mainly used for pile foundation in construction work,and it has the advantages in less pollution,low noise,and high efficiency compared to the traditional pile foundation.Study on the characteristics of static pressure prestressed pipe pile must be carried out and strengthened the research to increase the effectiveness and quality of static pressure prestressed pipe pile on construction works.This paper is mainly to analyzed the characteristic and construction technology of static pressure prestressed pipe piles on building construction work.

Temporal-spatial Characteristics of the Urbanization of Rural Land in Xinjiang

Relying on remote sensor technology, GIS and Land--sat TM digital images,the authors use spatial and statistical analysis to examine the temporal-spatial characteristics of the change caused by urban construction in Xinjiang’s rural areas from the end of the 1980s to the end of the 1990s. The primary findings show the following: 1) The urban construction in rural areas has increased drastically. The expansion speed of urban land use has accelerated over the past decade. The sub-land use changes caused by the urbanization of rural are characterized by salient regional differentiation among the three main regions and among the 85 counties of Xinjiang. 2) The shift of land use is mostly characterized by cultivated land and grassland being used for urban and industrial projects. Moreover, this change of land use is characteristic of regional differences. 3) Factors of rural-urban construction land use changes in Xinjiang, are undoubtedly affected by natural environment, social, economic conditions, and to a larger degree by population growth, GDP development and industrial development..

Construction of GPS MonitoringNetwork,Characteristics of RecentCrustal Movement,and Relationbetween Stress Field andEarthquake Activity in the NingxiaRegion

GPS observation network is deployed in the central part of Ningxia, which is the juncture of the Alxa block, Ordos block and Qinghai-Xizang (Tibet) block. Using the data of five phases of repeated survey sine 1996, the current state of crustal movement in the central part of Ningxia is analyzed. From the result, we can know the following. (1) In the period from Dec. 1996 to May 1999, the central part of Ningxia had the phenomenon of left-lateral movement about the west margin of Ordos (measuring station P2) and the Lingwu fault on the east of the Yinchuan basin displayed the mode of left-lateral reverse strike slip movement. In that region, the direction of the principal stress field was NNE-SSW (with an azimuth of 29.8?; the central part to the south of the measuring station P2 displaced eastward; the vertical deformation was obviously greater than the horizontal deformation in order of magnitude; the Yinchuan basin and Qinghai-Xizang (Tibet) block were in a state of rising; the measuring station P1 in the hinterland of Ordos showed a trend of subsiding year by year; and there may be a hidden fault to exist between the measuring points P3 and P4. (2) About one year before the occurrence of moderately strong earthquakes in the vicinity of the measuring region, deformation anomalies and abnormal changes of principal stress direction can be observed by the GPS measuring stations in that region; before moderately strong earthquakes near the measuring region and before strong earthquakes in adjacent regions, the simulated GPS deformation vector field ofthat region can betoken the approximate position of the coming earthquake. These results can be regarded as the eigenvalues of earthquake prediction for consideration.

The Form Characteristics and Construction of the Public Space of the Oasis Traditional Settlements in Turpan

Based on the analysis of the form characteristics and construction of the public space of oasis traditional settlements in Turpan,and from the analysis and summary of the types,elements,scales and functions of the public space of the traditional settlements,this study put forward that the public space of the oasis villages can be divided into point space,line space and plane space,and the formation and evolution rules of the public space of oasis traditional settlements in Turpan were obtained.Explore the role of public space in the construction of traditional settlements’ overall space,so as to provide reference for the development and renewal of public space of the current similar oasis settlements.

Construction of a model of autologous blood intracerebral hemorrhage in rats with a double injection and double needle withdrawal and the characteristics of the operative technique

BACKGROUND ： Experimental animal models of intracerebral hemorrhag （ICH） are greatly needed, so the process of establishment should be ideal in hematoma formation and easy to operate. OBJECTIVE ： To construct model of ICH in rats with double injection of autologous blood taken from the cut tail cut and double withdrawal of the needle （shortened as two-step injection model）, and compare with those induced by single and double injections. DESIGN ： A randomized controlled tria SETTING： Department of Neurology, General Hospital of Military Area Command of Chinese PLA. MATERIALS： Thirty male Wistar rats of 10 to 12 months, weighing （400±25） g, provided by the Experimental Center of Medical Animals, General Hospital of Shenyang Military Area Command of Chinese PLA, were divided randomly into 3 groups with 10 rats in each group： two-step injection group, single injection group, double injection group. METHODS ： The experiment was carried out in the Department of Neurology, General Hospital of Military Area Command of Chinese PLA from March to June in 2004. Autologous blood ICH model in rats were established as follows： In the two-step injection group, 50 μL unclotted autologous blood was taken from the rat tail cut, then injected with microsyringe into the caudate nucleus, 10 μL injected at first, paused for 2 minutes, and then the rest 40 μL injected slowly and continuously within 2 minutes. After the injection, the needle was kept immovable for about 4 minutes, withdrawn 2.0 mm, again kept immovable for about 4 minute, and then removed wholly at a slow speed. In the single injection group, 50 μL unclotted tail blood was injected slowly and continuously all within 2 minutes and the needle was slowly removed;（4） In the double injection group, 10 mL blood was injected at first, paused for 2 minutes, the rest 40 μL injected evenly within 2 minutes, and then the needle was withdrawn slowly and uninterruptedly. Neurologic findings were scored in accordance with Longa＇s five-point scale （0-4 scores, the higher the score, the severer the neurological dysfunction）. The rats were killed to remove and sections were prepared, the morphological features of hematomas were grossly observed, the maximal diameter and size of hematomas in each slice were measured with the imaging analytical system, and the volume was calculated. Meanwhile, the conveniences of the techniques were compared. MAIN OUTCOME MEASURES： The morphological features and volume of hematomas, neurologic deficit score （NDS）, and the convenience of the techniques were compared. RESULTS： All the 30 rats were involved in the analysis of results without deletion. （1） Results of the morphological observation of volume of hematoma： In the two-step injection group, hematomas located in the right caudate nucleus area regularly in circular or analogously circular shape in each slice. The formation rate of hematomas in the single injection group and double injection group were lower than those in the two-step injection group [60% （6/10）, 80% （8/10）, 100% （10/10）, P〈 0.01, 0.05]. The volume of hematomas in the single injection group and double injection group were smaller than those in the two-step injection group [（28.5±14.8）, （33.4±7.4）, （41.6±3.9） mm3, P〈 0.01, 0.05]. （2） NDS results： The NDS scores in the single injection group and double injection group were smaller than that in the two-step injection group （0.90±0.83, 1.30±0.78, 1.90±0.57, P〈 0.05）. （3）Comparison of the convenience of the techniques： The double injection method allowed generating reproducible hematomas in rats with shortcomings that it needed autologous arterial blood from femoral artery, and precision instruments such as microinfusion pump. The two-step injection injected fresh unclotting blood taken directly from the tail cut with microsyringe into the rat brain, and it has the advantages of easy operation, no influence on the activity of thrombase, shorter duration for model establishment, and higher rate of hematoma formation, which could generate ideal and economical models of ICH. The two-step injection induced hemotoma regularly in circular or analogously circular shape in each slice, but those induced by single and double injections were mostly in strip or fusiform shapes and extending along the needle tracks or into the ventricle or subarachnoid space. CONCLUSION ： The autologous blood ICH model induced by the two-step injection method is a reproducible and reliable one in regular shape, which is better than those induced by double and single injections.

New Characteristics of Residential Housing Construction Quality in China

Base on the investigation results of residential housing construction quality recent years in China,this research first analyzes the general quality condition of residential housing construction,then demonstrates the quality condition in different regions in our country,finds out main quality problems in the residential housing construction and studies the new characteristics of quality problems,finally provides the construction industry positive foundation to solve the quality problems objectively for residential housing construction.

新时代全国青少年校园足球特色学校:改革理念、现实聚焦与发展方向

教育部等7部门联合印发《关于加强和改进新时代青少年校园足球工作的实施意见》,旨在通过一系列政策突破与举措创新,着力提升校园足球特色学校建设质量。在改革理念方面,通过引领新时代学校体育改革,进一步发挥特色学校引领示范、先行先试作用;深化体教融合的调适路径,完善足球人才培养运行机制;推动校园足球高质量发展,实现“以体促全”的多维教育价值理念。在现实聚焦方面,要求紧密对接国家战略需求,积极服务教育强国战略部署,助力体育强国目标实现,推进健康中国全面实施;同时,破除关键发展条件桎梏,推动足球课程与教学模式改革,促进专业师资队伍扩容提质,优化场地设施与经费配置。研究认为,在新时代的历史节点上,校园足球特色学校建设应从政府、特色学校与体教融合3个维度统筹规划:坚持政府导向,从理念革新、资源供给方面系统谋划;调整特色学校路向,从整体布局、能力发展层次全面深化;顺应体教融合趋向,从创新模式、拓宽渠道角度协同推进。

教育学自主知识体系的本质特征和建构规律

教育学自主知识体系是教育主体自主建构的全面深入反映教育本质和规律的知识系统;是在海内外文化、不同学科知识相互影响、交融中形成的知识体系;是合目的与合规律、价值追求与思维逻辑统一的知识体系;是继承与发展、守正与创新结合形成的知识体系。这既是教育学自主知识体系的本质,也决定了它形成的规律和原则、方式、途径。

论中国特色社会主义工会学的建构逻辑

中国特色社会主义工会学的当代出场,适应了改革开放以来,尤其是中国特色社会主义进入新时代以来,我国工会工作蓬勃发展的客观要求,这是中国工会理论研究发展到一定阶段并向学科化转向的必然逻辑。中国特色社会主义工会学建构逻辑涵盖了研究对象、学科属性与基本特征,学科体系的逻辑起点与落脚点,范畴体系建构等,集中体现了中国工会发展在历史逻辑、理论逻辑和实践逻辑高度统一基础上的创新逻辑。

习近平文化思想的科学内涵、价值意蕴与原创性贡献

确立习近平文化思想是推动实现中华民族伟大复兴的现实需要,也是正确应对国际领域复杂意识形态斗争的迫切需求。习近平文化思想深化了对文化本质和文化自信自强的认识,深化了对文化发展道路的认识,深化了对新时代文化使命的认识,深化了意识形态工作与党和国家中心工作之间关系的认识,深化了对意识形态阵地管理的认识。习近平文化思想回答了新时代我国文化建设举什么旗、走什么路、坚持什么原则、实现什么目标等根本问题,涵盖文化建设的方向、目标、道路、原则等重要方面,是相对完整的思想体系。要正确理解“两个结合”、特别是“第二个结合”,高度重视意识形态安全,在学思用贯通、知信行合一中把学习贯彻习近平文化思想引向深入。

全面深刻把握习近平文化思想的三个维度

习近平文化思想是中国共产党对文化建设规律认识上的新高度。要全面深刻把握习近平文化思想,就要从新时代的伟大成就与伟大变革中认识其内涵、从中国式现代化的宏伟事业中理解其价值、从新时代新征程的时代背景中明确其要求。

职业院校课程思政体系建设的内涵、特征与策略

全面推进职业教育课程思政体系建设,是贯彻落实习近平总书记对职业教育工作重要指示和教育部《高等学校课程思政建设指导纲要》文件精神的内在要求。对职业院校课程思政体系建设进行理论解读,分析职业院校课程思政体系建设的内涵与特征,提出强化政治价值引领和顶层设计、聚焦制度完善、以示范项目引领和建构课程思政教学体系、激发教师课程思政改革创新活力、构建优质课程思政评价体系和完善德技并修育人机制等建设策略。

双学科协同建设背景下园林特色专业综合改革探索与实践——以甘肃农业大学为例

园林是构建生态文明、实现美丽中国的重要力量。甘肃农业大学园林专业依托特色专业建设和专业综合改革等项目,充分发挥林学、风景园林学双学科协同发展、相融互补的优势,制定双学科渗透融合的人才培养方案,构建区域和学科特色鲜明的多元化课程体系,形成“四位一体”的开放式实践教学平台,培养学生多学科共融的创新思维方式和较强的专业实践能力,为西北地区城乡园林绿地建设提供有力的技术和人才支撑。

西部地区推进乡村建设的现实困难与思路举措

乡村建设是实施乡村振兴战略的重要任务。现阶段乡村建设的最大短板在西部地区,最大难点也在西部地区。与东部、中部地区相比,西部地区乡村建设面临基础设施建设尚不健全、补齐乡村基础设施短板任务重,公共服务能力明显不足、推进城乡基本公共服务均等化难度高,产业基础相对薄弱、实现脱贫产业健康发展挑战多,人居环境整治提升地域差异性、农民主体性和操作实效性重视不够,以及乡村要素持续外流和公共财力投入有限等一系列突出难题。今后一个时期,应遵循城乡发展规律和乡村建设规律,立足西部实际和农民现实需要,给予西部地区乡村建设特殊且有效的帮扶措施,学习应用“千万工程”经验,稳步提升西部乡村基础设施完备度、公共服务便利度、特色产业持续性、人居环境舒适度和农民群众幸福感,不断夯实中国特色农业强国和社会主义现代化强国建设基础。