摘要：随着信息技术的不断发展,移动智能设备与互联网服务已成为校园生活的重要组成部分。为达成更全面、高效的校园服务愿景,文章从服务设计视角出发,梳理现有校园服务平台的服务内容及发展现状,提出以用户模型图驱动个性化服务、用户旅程图挖掘服务痛点、服务蓝图优化服务流程的设计策略。从关注用户个性化需求、融合情感化服务设计、优化界面设计三个维度拓展校园服务平台的设计思路。以期在最大程度满足用户需求的同时,提供更简洁便利的综合性服务,为高校校园服务平台建设提供价值的参考。

摘要：报道了基于种子脉冲预整形实现的百微焦1550 nm线偏振脉冲单频光纤激光器.通过设计三角形脉冲种子波形,优化其前沿上升趋势及低强度持续时间,缓解脉冲激光在放大过程中因增益饱和效应引起的脉冲宽度压缩、激光峰值功率快速增长问题,实现高能量脉冲单频激光放大.实验中基于优化设计的脉冲种子波形,在纤芯直径为12μm的铒镱共掺光纤中,实现了脉冲宽度608 ns、能量130μJ、光谱线宽542 kHz的1550 nm线偏振脉冲单频激光输出.

摘要：为了量化损耗因子对统计能量方法中振声响应的影响能力,以声腔-板件-声腔三子系统统计能量分析模型为研究对象,基于能量守恒原理建立矩阵形式的功率流平衡方程,提出振声能量损耗因子参数的灵敏度计算方法,分析每个子系统能量响应受各子系统阻尼损耗因子及子系统间耦合损耗影响程度的宽频段计算结果。计算结果明确两类损耗因子的参数灵敏度排名情况,指出在设计阶段为了降低分析维度可以忽略的参数,定量分析在不同频段内改变各子系统能量的高效方式,可为此类典型的减振降噪问题提供参考。

摘要：轧辊长时间使用表面会出现很多缺陷,为在修复前进行轧辊的缺陷检测,这里提出一种基于机器视觉的轧辊表面缺陷检测方法。利用工业相机获取轧辊表面图像;使用中值滤波算法去除图像中的干扰信息并使用拉普拉斯方法对图像进行锐化处理,增强轧辊表面缺陷区域的边缘信息;然后采用Otsu最佳阈值分割算法对图像进行分割,使图像更容易被理解和分析;最后,使用模板匹配技术进行缺陷识别;对裂纹、腐蚀、辊印这三种缺陷的识别率分别为98.75%、92%、93.33%。该检测系统表明对于腐蚀、裂纹、辊印这3大类轧辊缺陷情况有较好的检测效果。

摘要：Seismic design should quantitatively evaluate and control the risk of earthquake-induced collapse that a building structure may experience during its design service life. This requires taking into consideration both the collapse resistant capacity of the building and the earthquake ground motion demand. The fundamental concept of uniform-risk-targeted seismic design and its relevant assessment process are presented in this paper. The risks of earthquake-induced collapse for buildings located in three seismic regions with the same prescribed seismic fortification intensity but different actual seismic hazards are analyzed to il- lustrate the engineering significance of uniform-risk-targeted seismic design. The results show that with China＇s current seis- mic design method, the risk of earthquake-induced collapse of buildings varies greatly from site to site. Additional research is needed to further develop and implement the uniform-risk-targeted seismic design aoDroach oronnsed in thi~ nnner

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：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：以茅台镇某酒厂不同年份(2021年、2022年和2023年)生产的酱香型白酒二轮次基酒为研究对象,采用顶空固相微萃取-气相色谱-质谱联用技术(HS-SPME-GC-MS),结合感官定量描述和主成分分析(PCA)等多元统计学方法,解析不同年份二轮次基酒挥发性风味物质差异性。结果表明,不同年份二轮次基酒的香气特征相似,均为酸香、粮香较突出;从不同年份二轮次基酒共检出165种挥发性风味化合物,包括酸类9种、酯类47种、醛类19种、醇类27种、酮类16种及其他类47种,以酸类、酯类、醛类、醇类、酮类为主,且各类物质的含量均随贮存年份增加而升高。PCA和正交偏最小二乘-判别分析(OPLS-DA)结果表明,不同年份二轮次基酒样品能明显被区分,模型预测能力较高,以变量重要性投影(VIP)值>1且P<0.05为筛选条件,筛选出71种重要差异挥发性风味物质,包括异戊酸乙酯、正己酸乙酯、二丙基二硫等。该研究结果为酱香型白酒酒体设计、风味物质研究提供了理论依据。

摘要：In the paper,an operational program of electric bus charging station is proposed,which is special for "The Construction Project for Expo 2010 Temporary Electric Bus Charging Station".Based on the quick-change mode,a vehicle operating schedule model has been established to meet the capacity of ***,according to the quantity of passengers and utilization of batteries,a calculative method of parameters,such as the number of spare batteries and bus departure rules,has been ***,optimal simulation software designed for operating process of the charging station has been identified incorporating actual running data from electric buses and monitoring system of the charging station,and the rationality of the design is verified in the preliminary commissioning and the official operation.

摘要：通过计算乌加河地震台SS-Y型伸缩仪采取密封措施前后数据的一阶差分、功率谱密度和均方根误差,研究其时频特征,并设计虚拟密封滤波器。结果表明,虚拟密封滤波后,0.07~0.5 min^(-1)的噪声信号抑制明显,达到了安全降噪的目的,对提高观测精度有一定的借鉴意义。