摘要：为小黑麦(triticale)东农96026在黑龙江省哈尔滨地区种植获得高的产量及较优的饲用品质,从栽培措施的密度及氮肥施用入手,采用裂区设计,4个密度水平(基本苗750万株/hm2,600万株/hm2,450万株/hm2,300万株/hm2),3个施氮水平(纯氮75kg/hm2、150kg/hm2、225kg/hm2),研究了不同密度和氮肥处理对小黑麦东农96026生长发育、产量及饲用品质的影响。结果表明,降低密度和增加氮素营养水平利于提高东农96026的生物产量,并具有较好的饲用品质。在种植密度为450万株/hm2、施氮水平为150kg/hm2时产量结构比较协调,品质最优。

摘要：作为一种立体式宣传的广告形式,多媒体广告产品的开发是一种群体性创作,在艺术性的设计上,对于不同设计专业的协调合作要求更高,一个合理的工作流程尤为重要。平面设计、三维设计、影视设计的风格、思想、创意在此必协调统一。

摘要：According to the Code for Seismic Design of Buildings （GB50011-2001）, ten typical reinforced concrete （RC） frame structures, used as school classroom buildings, are designed with different seismic fortification intensities （SFIs） （SFI=6 to 8.5） and different seismic design categories （SDCs） （SDC=B and C）. The collapse resistance of the frames with SDC=B and C in terms of collapse fragility curves are quantitatively evaluated and compared via incremental dynamic analysis （IDA）. The results show that the collapse resistance of structures should be evaluated based on both the absolute seismic resistance and the corresponding design seismic intensity. For the frames with SFI from 6 to 7.5, because they have relatively low absolute seismic resistance, their collapse resistance is insufficient even when their corresponding SDCs are upgraded from B to C. Thus, further measures are needed to enhance these structures, and some suggestions are proposed.

摘要：PC工法桩是将钢板桩与钢管桩通过锁口接头相互连接形成的新桩型,具有环境影响小、施工效率高、可回收等优点,可作为基坑围护结构。然而其支护机制尚缺乏深入的研究及试验佐证。基于相似原理,设计和开展无内支撑PC工法桩围护基坑开挖模型试验。模拟基坑开挖至围护结构变形失效的全过程,并对试验过程中模型桩的桩身应变、桩顶位移、地表沉降、桩侧土压力以及基坑外地基土变形进行实时测量和分析。钢管桩与钢板桩模型通过3D打印技术制作,试验在干砂地层进行。研究表明:随着基坑开挖至围护结构失效,基坑外地表沉降形态呈三角形沉降分布特点,PC工法桩后地基土体出现明显的土体滑动破坏面,与水平面最大夹角为59°;当开挖深度逐步增加,PC工法桩组合围护结构从各单桩相互独立的支护状态到逐渐成为整体式围护结构,钢管桩与钢板桩的变形均呈悬臂式位移形态,两者的桩身弯矩均呈“S”形分布。钢板桩与钢管桩的桩身弯矩之比近似等于其桩身抗弯刚度之比。为保证悬臂基坑开挖的安全性与经济性,建议PC工法桩的插入比λ=2~2.5。PC工法桩的凹凸状截面特性影响其墙侧土压力的分布形式,具体而言,当桩身变形较小时,支护侧PC工法桩凸出部分的土压力值大于凹处;当桩身挠度较大时,则凸出部分的土压力值小于凹处。

摘要：稻蟹共生种养是全面推进我国特别是东北地区乡村振兴的特色产业,但养蟹稻田和常规稻田水分循环和水土环境特征究竟有何差异尚不清楚。为定量表征稻蟹共生种养模式水分循环和水土环境特征,在辽河入海口两处大型养蟹灌区(营口灌区和大洼灌区)布设12个典型田块,以常规稻田为对照,对养蟹稻田逐日蒸腾蒸发量、逐日渗漏量、灌溉定额、水体和表层土壤养分动态、养分淋失以及水稻和螃蟹产量等进行定量研究。结果表明:稻蟹共生模式对水稻产量无显著影响,但河蟹产值的增加,使得养蟹稻田综合经济效益比常规稻田显著提高38.89%~76.49%(P<0.05)。与常规稻田相比,养蟹稻田灌溉定额和渗漏总量分别显著增加3.29%~20.93%(P<0.05)和5.66%~10.83%(P<0.05),水分生产率显著降低1.85%~9.28%(P<0.05),但单位用水综合产值显著增加33.34%~70.23%。与常规稻田相比,养蟹稻田田面水NH_(4)^(+)-N、NO_(3)^(-)-N、速效磷和速效钾含量分别显著降低19.99%~37.24%、35.25%~56.22%、18.69%~20.30%和8.12%~9.36%(P<0.05),减轻了地表径流养分面源污染潜在风险。与常规稻田相比,养蟹稻田表层土壤NH_(4)^(+)-N、NO_(3)^(-)-N、速效磷和速效钾含量显著提高60.00%~83.88%、18.21%~44.97%、28.34%~54.56%和10.47%~21.24%(P<0.05),提升稻田土壤肥力。与常规稻田相比,养蟹稻田NH_(4)^(+)-N、NO_(3)^(-)-N、速效磷和速效钾淋溶损失量分别显著增加20.60%~25.20%、26.24%~44.75%、14.15%~18.83%和4.31%~16.94%(P<0.05),促进养分向深层剖面(20~100 cm)转移。本研究揭示了稻蟹共生系统具有提高单位用水综合产值、降低径流污染风险、提升地力和增加稻田综合经济效益等巨大潜力,但其促进稻田养分淋失的问题不容忽视。本研究可为养蟹灌区绿色可持续发展和农民增收致富提供理论依据和技术支撑。

摘要：The concepts of seismic isolation and energy dissipation structures emerged in the early *** China,the first seismic isolation structure was finished in 1993,and the first energy dissipation structure was built at about the same *** to 2007,China had more than 600 seismic isolation and about 100 energy dissipation building *** 2008,the huge Wenchuan earthquake hit the southwest of China,which triggered a bloom of new seismic isolation and energy dissipation *** paper presents the development history and representative applications of seismic isolation and energy dissipation structures in China,reviews the state-of-the-practice of Chinese design,and discusses the challenges in the future *** findings are as follows:Basic design procedures are becoming standardized after more than ten years of experiences,which mainly involve determination of design earthquake forces,selection of ground motions,modeling and time-history analyses,and performance *** time-history analyses using multiple ground motions are the characteristic of the design of seismic isolation and energy dissipation ***,standardization and quality control of devices,balance between performance and cost,comparison with real responses,and regular inspection are identified as the issues that should be improved to further promote the application of seismic isolation and energy dissipation structures in China.

摘要：以中国扶贫议题为案例,使用时间序列分析中的基于向量自回归(VAR)模型的多元格兰杰因果检验和脉冲响应分析,本研究考察了Twitter上中国主流媒体账号与国际主流媒体账号和Twitter普通用户在10年间4个议题阶段的议程设置关系方向和强度特征以及变化趋势。研究发现,从议程设置的方向上来看,中国主流媒体经历了一个稳步摆脱被动、曲折占据主动的历程;从议程设置的强度来看,不同于方向的复杂变动,脉冲响应分析显示了中国主流媒体一以贯之的定力,始终掌握着扶贫议题的所有权并拥有更强的引导力。在理论发现上,研究认为,应当在对议程设置表面“方向”的关注基础上,进一步探查其背后的议程设置“强度”;不同主体间议程设置的关系不仅是单纯方向意义上的“主动”“被动”或“互设”,还需要考虑处在同一连续体上的强度大小问题。

摘要：Pebble bed reactors enable the circulation of pebble fuel elements when the reactors are in *** unique design helps to optimize the burnup and power distribution, reduces the excessive reactivity of the reactor,and provides a mean to identify and segregate damaged fuel elements during operation. The movement of the pebbles in the core, or the kinematics of the pebble bed,significantly affect the above features and is not fully understood. We designed and built a detection system that can measure 3-axis acceleration, 3-axis angular velocity,3-axis rotation angles, and vibration and temperature of multiple pebbles anywhere in the pebble bed. This system uses pebble-shaped detectors that can flow with other pebbles and does not disturb the pebble movement. We used new technologies to enable instant response, precise measurement, and simultaneous collection of data from a large number of detectors. Our tests show that the detection system has a negligible zero drift and the accuracy is better than the designed value. The residence time of the pebbles in a moving pebble bed was also measured using the system.

摘要：随着国家网络安全政策的不断完善,安全市场处于政策红利期。如何在有限的资源条件下,将分散的安全能力贯通,打破资源共享壁垒,打造一体化安全智能运营体系,对内赋能生产,对外输出能力,成为电信运营商急需解决的难题。本方案提出一种基于大模型的安全运营与态势感知、安全编排与自动化响应、安全能力底座组成的“头-躯干-手脚”3级架构,可有效实现安全能力整合和任务智能调度,既可优化公司内部现有流程,又能更好实现能力外输变现。

摘要：目的探索安化黑茶包装在现代审美背景下的形态创意构想和设计表现方法。方法分析安化黑茶包装形态的历史演变过程、发展局限和市场期许,结合创新设计案例,探讨安化黑茶包装形态的创意及表现。结论安化黑茶的包装形态创意设计有利于实现品牌传播与产品销售的双赢,对现代茶包装的形态创意设计具有积极意义。