基于TSCD模型的轨道板裂缝检测方法

为解决轨道板裂缝检测问题,提出了一种基于分支级联卷积神经网络的轨道板裂缝检测模型——TSCD.首先该模型通过注意力机制和搜索分支结构突出轨道板裂缝的位置信息,同时抑制干扰信息;然后采用检测分支结构完成裂缝的像素级检测;最后对检测结果中出现的图像细节退化问题,利用参数映射关系实现特征图的上采样.实验结果表明:所提出的方法...     

哀牢山中山湿性常绿阔叶林与人工茶园土壤呼吸的季节变化

利用Li-840 CO2气体分析仪,测定并分析了哀牢山中山湿性阔叶林和具有30 a历史的茶园的土壤呼吸季节变化特征。结果发现:在干季,土壤呼吸速率表现为茶园显著大于阔叶林,而在湿季,茶园略小于阔叶林,从全年结果看茶园略大于阔叶林;茶园的土壤温度和土壤含水量均显著大于阔叶林;通过土壤温度和土壤水分的双因子模型,得到土壤温度和土壤水分对茶园和阔叶林的土壤呼吸变化解释率分别为49.6%和70.7%;土壤呼吸的温度敏感性表现为茶园小于阔叶林;茶园土壤有机质碳、氮量显著小于阔叶林,而在土壤质量密度、pH、磷和钾含量方面,则茶园显著大于阔叶林。     

江苏省苔藓植物新记录属种

报道了分布于江苏省苔藓植物1个新纪录属、23个新记录种．1个新记录属为陈氏属（Chenia）;23个新记录种为圆叶异萼苔（Heteroscyphus tener）、叉齿异萼苔（Heteroscyphus lophocoleoides）、多褶耳叶苔（Fmllania polyptera）、尼泊尔耳叶苔（Frullania nepalensis）、溪苔（Pellia epiphylla）、小叶苔（Fossombronia pusilla）、粗肋凤尾藓（Fissidens laxus）、多形凤尾藓（Fissidens diversifolius）、黄边凤尾藓（Fissidens geppii）、微疣凤尾藓（Fissidens schwabei）、立膜藓硬叶变种（Hymenostylium recurvirostrum）、平叶墙藓（Tortula planifolia）、丛生短月藓（Brachymenium pendulum）、中华短月藓（Brachymenium sinense）、灰黄真藓（Bryum pallens）、日本匐灯藓（Plagiomnium japonicum）、细枝毛灯藓（Rhizomnium striatulun）、南亚灰藓（Hypnum oldhamii）、黄灰藓（Hypnum pallescens）、扁灰藓（Breidlefia pratensis）、金灰藓（Pylaisia polyantha）、弯枝金灰藓（Pylaisia curviramea）和陈氏藓（Chenia leptophylla）．     

Depositional history of the early part of the Jurassic succession on the Rajasthan Shelf, western India

Part of the lowermost deposits of the Triassic to Earlymid Jurassic (up to Bajocian) sedimentary succession spread across the Rajasthan shelf on the western part of the Indian craton is found in the Jaisalmer Basin east of Jaisalmer with the best exposed sections along the Jodhpur-Jaisalmer Highway. Based on lithostratigraphic characteristics, the succession is divided into four: Odania and Thaiat members, Lathi Formation; and Hamira and Joyan members, Jaisalmer Formation. Six facies are defined from microfacies, sedimentary structures, biotic components and depositional environments: (1) ferruginous, pebbly, cross-bedded sandstone—high-energy, fluvial; (2) cross-bedded, poorly sorted, fossil wood-bearing sandstone—highenergy, terrestrial, with high influx of sediment and warm and humid climate; (3) cross-bedded to rarely bioturbated, alternating silt to fine-grained sandstone—fluctuating sedimentation rates and energy—nearshore, mesohaline embayment to lagoonal; (4) partly bioturbated, storm-dominated, mixed siliciclastic-carbonate facies—fully marine; (5) low angle cross-laminated, silt to fine-grained sandstone—nearshore shallow water, above fair weather wave base; and (6) thick rudstones with mega-ripples and reworked coral heads-storm deposits representing the peak of first major marine transgression across the basin.     

Stratigraphy and paleontology of the marine Jurrassic strata in Vietnam

Marine Jurassic strata in Vietnam have yielded characteristic ammonites and occur in: (1) west Quang Binh Province located in the eastern margin of the Nam Theun Basin (the main part of which is located in Middle Laos); (2) the Nong Son Basin situated in the north of the Kon Tum Geoblock; (3) the Da Lat Basin, the largest Jurassic basin in Vietnam, extending from the southern margin of the Kon Tum Geoblock to southeast of Ho Chi Minh City. In the first two, Lower Jurassic marine beds occupy the lower part of the section and grade up into Middle Jurassic red beds. In central Da Lat Basin the section consists completely of marine strata containing many ammonite levels dated from Early Sinemurian to Bajocian, whereas the marginal basin section is like the first two areas. Based particularly on biostratigraphical evidence, a marine transgression is considered to have entered the Indochina Block as early as the Late Hettangian. During the early transgression the fauna was distinctly endemic, showing the separate character of the basins, but since the Late Sinemurian, communication between the Da Lat and other basins was established; the marine regime in Da Lat Basin ended around the Late Bathonian.     

雨水资源的利用及其实验

非常规水资源,特别是雨水资源的利用已成为解决缺水问题的重要途径．在分析国内外雨水资源研究现状的基础上,对雨水利用技术进行了介绍和探讨．通过在某单位大厦所建立的雨水利用系统的实验研究,分析了降雨量与集雨量,及降雨强度与集雨量的关系,并按有关标准对降雨过程进行了采集、处理和水样分析．结果表明,集雨量与降雨量和降雨强度并不存在线性关系,而且在降雨量大于20 mm,或平均降雨强度大于0．04 mm／min的情况下,该系统才有收水的可能．雨水经处理后的水质优于有关国家设计标准,完全可用于城市生活杂用水．     

基于Petri网和UML活动图工作流建模比较

在工作流建模中Petri网和UML活动图各自发挥了十分重要的作用，然而对于其建模的适应性却没有充分的研究。通过对工作流管理系统的分析，认为工作流管理系统具有响应性、协作性和开放性特点。在给定适合工作流建模的UML活动图语义基础上，讨论了工作流建模的几个关键要素在Petri网和UML活动图下的建模比较，通过分析认为，Petri网更适合于封闭，主动系统的建模，UML活动目能够较为充分的适应开放、响应型系统的建模。Petri网较适合对稀有资源的建模．因此UML活动图更适合工作流这种开放，响应型系统建模。     

企业国际化与经营绩效:中国制造业上市公司的实证研究

探讨中国制造企业以出口为主的国际化经营行为，以中国329家拥有出口业务的制造业上市公司为样本数据来分析企业国际化程度与经济绩效的关系。通过多元线性回归分析．我们发现目前中国创造企业的出口行为对绩效产生了负向影响．以出口比例衡量的国际化程度与企业的销售净利率和总资产净利率显著负相关。     

梁启超的“新民”说与“君子儒”

戊戌变法后,梁启超东渡日本,在广泛接受西方文化的基础上提出了“新民”说,梁启超的“新民说”对儒学传统既有所继承又在融合中西文化的基础上有所创新,他的这种兼容并蓄的文化创新观念,即便在今天对我们仍有很大的启迪作用。