共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
3.
凉山具有充足的光热资源,日照长,昼夜温差大,雨量充沛,这正是油橄榄树生长最佳的气候环境。 相似文献
4.
本文根据日照资料和太阳总辐射值,探讨了江西光能资源和光合潜力的分布规律。分析指出:江西光能资源丰富,年日照为1473—2078小时;年太阳总辐射为4059—4744MJ/m~2。地区分布以赣南盆地和鄱阳湖盆地最多,西部山区最少。江西全年光合潜力为11900—13900斤/亩;水稻生产潜力为3800—4500斤/亩,约相当实际产量的5—7倍。可见江西蕴藏着巨大增产潜力。 相似文献
5.
6.
为了研究容积率对建筑日照的影响,以贵阳市花果园一期社区作为高密度城市社区的典型研究对象,运用日照分析软件和阴影分析法,对高密度城市社区进行容积率、建筑物日照和建筑物窗口日照研究。按照贵阳市住宅容积率标准对社区容积率进行分析,结果显示该社区不符合标准,且容积率过大,超过标准值1.9。按照我国住宅建筑日照标准,充分考虑地形因素和建筑物窗口因素,研究建筑物日照和建筑物窗口日照,结果表明:在高容积率影响下,该社区不符合日照标准的建筑物占100%,不符合日照标准的建筑物窗口占62.71%,1~24层均受到0~2 h的日照时长,日照严重不足。本研究针对高密度城市社区进行研究,结果可为高密度城市社区的规划和设计提供科学依据。 相似文献
7.
旧城改造工作中的光遮挡环境问题凸现,由此引发的日照问题逐渐受到广泛关注.已往的日照环境影响评价大多针对拟建项目对周围原有项目的影响,而忽略了新建项目可能受到潜在的光遮挡.本文从连续日照时间的角度,重点对新建高层建筑可能会受到的日照环境影响进行分析,尝试提出一种日照问题的方法"零项目"日照环境影响评价法. 相似文献
8.
9.
本文首先分析了当前全民文化阅读的需求,并提出解决问题的思路,以日照职业技术学院为例,为进一步提高服务水平,创建书香文化校园,营造为实现中国梦而读书的学习氛围,学校图书馆重点开展人文素养空间建设工作,如真人图书馆、存得读书、好书推送、诗词听写大会等等。 相似文献
10.
巴州太阳能资源状况研究 总被引:1,自引:1,他引:0
对新疆巴音郭愣蒙古自治州(简称巴州)的太阳能资源分布状况和利用现状进行了较为详细的调查和研究,得到了巴州日照和太阳能辐射情况。在此基础上,对巴州常规能源与太阳能进行了比较,结果显示:巴州太阳能十分丰富,远大于其常规能源的总储量。 相似文献
11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness. 相似文献
12.
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly. 相似文献
13.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。 相似文献
14.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death. 相似文献
15.
Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula- 相似文献
16.
Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re- 相似文献
17.
Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that 相似文献
18.
Michael Springborg 《华南师范大学学报(自然科学版)》2014,(6):136
For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the 相似文献
19.
《上海师范大学学报(自然科学版)》2014,(5):550
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with 相似文献