成垄压实耕作条件下土壤水分分布的试验研究

利用野外模拟降雨试验，研究了不同垄沟（自然垄沟、盖膜垄沟、成垄压实）耕作条件下土壤水分分布特征和再分布规律。结果表明：垄沟耕作改变了农田微地形，利用垄上降雨顺垄流人沟中，从而拦蓄部分径流，相对增加了沟中土壤蓄水，有利于水分向下运移。相对于自然垄沟，膜垄的集雨效果明显，沟中土壤平均含水量显著高于垄中，20～100cm土层范围内平均土壤含水量分别为12．7％和9．1％；成垄压实土壤水分在剖面分布状况与盖膜垄沟的水分分布相似，水分向沟内集中，沟中土壤水分含量显著高于同一土层深度处垄中土壤含水量，且与盖膜垄沟处理下沟中土壤水分含量无显著差异，在集水和聚水方面表现出和膜垄的相似性。因此，在以集雨农业为主的半干旱地区，成垄压实可以替代盖膜垄沟，有效地富集和储存雨水资源于沟中，供作物吸收利用。     

积分型Meyer-Knig-Zeller算子在Orlicz空间中的逼近阶

在Orlicz空间LM 中研究积分型Meyer-Ko　¨nig-Zeller算子的逼近阶,并得到了1种估计。     

LB空间上的纲性定理

给出了局部凸空间是第二纲空间的一个必要条件 ,证明了( LB)空间 (它是不可赋范的 ,完备的桶式空间 )是第一纲空间 ,进而回答了桶式空间中是否有第一纲空间和不可赋范的局部凸空间 X的强对偶 X* 是否一定不可距离化的问题     

城市开放空间中高容集率游憩型空间的营造

本文针对城市开放空间用地紧张而有户外游憩要求的民众不断增加这一矛盾,重点关注城市开放空间的容集率问题,深入探讨游憩型空间的类型及如何结合特殊的景观设计手法提高城市开放空间中游憩空间的使用效率及容集率。     

连续映射的扩充Ⅰ

本文采用格论观点研究拓扑学中连续映射的扩充问题，给出陪域为局部紧的Ｔ＿２空间时连续映射扩充的充要条件，此结果包括陪域为紧空间或实数域的情况作为特例．     

一类半定规划问题的最优性条件

先引入向量值函数的广义凸性,研究了向量值不变凸函数与不变预凸函数的关系.接着证明了当一类函数是局部Lipschitz的不变凸函数时的广义Fakars引理.最后利用广义Fakars定理,研究了一类半定规划问题的最优性条件.     

Biodiversity in sacred urban spaces of Bengaluru,India

Urban green spaces provide critical social and ecological support for cities, but we know little about their diversity and composition in cities of the Global South. This is especially true of lesser known urban spaces such as sacred sites, which are of important cultural and biodiversity significance. We examine tree diversity and composition in sacred sites in Bengaluru, one of India’s fastest growing cities. We recorded 5504 trees from 93 species across 62 temples, churches, and Hindu, Christian and Muslim cemeteries in central areas of Bengaluru. Over half (52%) of the tree species were of native origin, a much higher proportion when compared to other green spaces in the city such as parks. Tree density in sacred sites was much higher than that in parks and informal settlements in Bengaluru. Temples and Hindu cemeteries contained the highest proportion of native species, with large numbers of Ficus benghalensis, a keystone sacred species. Trees in sacred spaces provide an important buffer against urban environmental stress in Indian cities, and serve as refuges for urban wildlife and biodiversity. We need greater information on these lesser known, but culturally significant alternate spaces. They play an important, though ignored role in the environmental sustainability of rapidly growing cities in the Global South.     

Carbon sinks in urban public green spaces under carbon neutrality: A bibliometric analysis and systematic literature review

Urban green spaces play essential roles in regulating the global carbon cycle and reducing carbon dioxide (CO₂) emissions. However, research on the carbon sequestration efficiency of urban public green spaces, which is closely related to the human settlement environment, has not received enough attention. Thus, we systematically analyzed the existing literature in the Web of Science core database using bibliometrics and network analysis combined with the CiteSpace visualization tool. The aim of this review was to elucidate the focus and development trend of research conducted between 2007 and 2022 on carbon sinks in urban public green spaces. Our results demonstrated that: 1) Numbers of related publications are increasing annually, indicating that the subject is receiving increasing global attention. Related research topics primarily focus on two aspects: carbon sink measurement methods and sustainable carbon sink design for urban public green spaces. 2) Methods for measuring and monitoring carbon sinks in the urban public green spaces include sample plot measurement, the assimilation method, the micrometeorological method, the remote sensing (RS) estimation method, and laboratory work. Most methods follow the forestry system approach and lack the methods and techniques to directly assess the carbon sink effectiveness of urban public green spaces. 3) Key factors affecting the carbon sink capacity of urban public green spaces are: plant species selection, plant community structure, green space characteristics, and maintenance management. 4) Future research should focus on encouraging public participation in the design of sustainable carbon sinks in urban public green spaces, advancing biodiversity research on carbon sinks in urban public green spaces, and enhancing the precision of measurements while addressing regional differences. This study contributes to the integration of research on the effectiveness of carbon sinks in urban public green spaces and provides a theoretical reference and guidance reduces prospective urban emission and achieves climate goals.     

VARIATION OF LOCALLY LIPSCHITZ FUNCTION ON FINSLER MANIFOLD

In this paper, we generalize the generalized gradient of clarke on Banach manifold to the case of Finsler manifold and discuss the variational property of corresponding locally Lipschitz function, such as pseudo-gradient vector field, deformation lemma and Morse inequality.     

成垄压实耕作施肥机械的改进设计(简报)

基于土壤大孔隙流理论、垄沟微型集雨理论和阻水层理论提出的成垄压实耕作施肥方法,能够有效地达到集雨保肥的作用,而推行该耕作措施的关键是加强其配套农机具的研制.在国外相关研究的基础上改进设计了成垄压实耕作施肥机械.该设计合理.一机多用.具有结构紧凑、调整方便等特点.采用改进后的平底箭铲式施肥开沟器能够阻断土壤中大孔隙流的连续性,在垄底形成一致密的施肥带,减少了氮肥在土壤中随大孔隙流的淋溶迁移.利用单圆盘起垄覆盖施肥带,并采用仿垄形加压式镇压器对垄面进行镇压,通过改变弹力来实现镇压力的调整,形成不同紧实度的水分运动障碍层.达到集雨保肥的作用.