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161.
Solar-driven high temperature radiant cooling 总被引:1,自引:0,他引:1
Solar energy is widely used as one of the most important renewable energy. In addition to the growing applications of solar
PV and solar water heater, solar cooling is also considered very valuable and the related researches are developing fast because
of the synchronism between solar irradiance and building cooling load. Current studies mainly focus on the high temperature
solar collector technique and heat-driven cooling technique, while little concern has been paid to the transport process of
cooling power. In this paper, the high temperature radiant cooling is studied as an alternative way for transporting cooling
power, and the performance of the combination of radiant ceiling and solar cooling is also studied. From simulation and theoretical
analysis results, high temperature radiant cooling terminal shows better cooling power transportation ability against conventional
air-conditioning terminal, and its thermal comfort is improved. Experiment results indicate that radiant cooling can enhance
the chiller’s COP (Coefficient of Performance) by 17% and cooling power regeneration by 50%. According to analysis in this
paper, high temperature radiant cooling is proved to be suitable for solar cooling system, and out work can serve as a reference
for later system design and promotion.
Supported by the National Natural Science Foundation of China (Grant No. 50876064) 相似文献
162.
基于数据流优化的BPEL流程分割方法 总被引:1,自引:0,他引:1
BPEL描述的业务流程在跨组织的企业应用集成与协作中扮演着重要角色.目前BPEL流程主要采用集中式的执行方式,但是集中式执行的BPEL流程性能不高并且不能满足动态流程管理的需求.提出了一种基于数据流优化的BPEL流程分割方法,以支持BPEL流程的分散化执行.BPEL流程经过变换被表示成PFG图,提出数据流方程对PFG图进行数据流分析,扩展复制传播算法优化PFG图的数据流.最后按照流程中的角色分割BPEL流程.实验数据表明优化分割后的业务流程的吞吐率、响应时间等方面的性能有较大提高. 相似文献
163.
The phenomena of anther opening and closing in Paris polyphylla var. yunnanensis (Franch) Hand.-Mazz were described in detail, and the effects of ecological factors on those phenomena related to anther
opening, closing and the fly-pollination mechanism were discussed. Anthers of P. polyphylla var. yunnanensis open in the morning and close in the evening every day during an over 20 days’ period of anthesis. Light was detected as
the main factor controlling this daily anther opening and closing. Anther opening can be reversed in response to rain and
re-opens when rain stops. Relative humidity (RH) has a slight effect on anther opening and closing. Flower spans can be prolonged
under laboratory conditions. This novel behavior of anther is likely to be a mechanism to enhance the male fitness in this
species, of which has no inherited structure to protect pollen from the perianth. 相似文献
164.
文章就如何在中等职业类学校中"五笔"课程教学进行了初步探索,从5个方面论述了"五笔"课程的教学方法与手段,着重培养学生理论和实际相结合的能力. 相似文献
165.
结合工程实际分析了粉煤灰、机制砂掺入水泥混凝土后对混凝土特性的影响,为粉煤灰和机制砂在公路桥梁中的大量利用提供参考。 相似文献
166.
文章简要介绍了当前中国隧道监控系统的构成,在此基础上分析了控制系统的整体解决方案以及其区域控制器(PLC)及网络的选型,同时,以贵州玉凯高速公路项目为例,详细分析了单隧道和隧道群的具体解决方案,最后分析了隧道监控系统的改进与发展。 相似文献
167.
通过分析图书馆人力资源的现状及存在的问题,提出了图书馆人力资源管理的新理念,认为图书馆在人力资源管理方面应以人为本,引入竞争机制、激励机制等。 相似文献
168.
Proteins differentially expressed from maize leaves in response to the infection by Curvularia lunata strain CX-3 were identified through a high-resolution two-dimensional gel electrophoresis (2-DE) method. Two inbred lines, 78599-1 and E28, were used, respectively, as resistant and susceptible lines to CX-3 infection. Proteins were extracted from the fourth leaves of six- or seven-leaf stage plants sampled at 24, 36, 48, 60, and 72 h after inoculation with CX-3. Twenty-seven differentially expressed protein spots resolved on the 2-DE gels were identified by MALDI-TOF MS/MS. The results showed that these proteins are associated with photosynthesis, respiration,oxidative and drought stress tolerance as well as signal transduction in maize. Among stress-related proteins, the 22 kDa drought-inducible protein, putative glutathione peroxidase (GPX), and translation initiation factor (eIF-5A) were up-regulated in the resistant inbred line and were implicated in host defense response to C. lunata infection. It suggests that drought-inducible and oxidation stress-related proteins might directly contribute to maize resistance to C. lunata. 相似文献
169.
王梦瑶 《高技术通讯(英文版)》2009,15(3):315-318
The V-shaped electro-optical properties control is investigated by an equivalent circuit model.Simu- lation results show that genuine V-shaped form is only observed at hysteresis inversion frequency,and be- low and above this frequency an anomalous and normal hysteresis are observed.And the inversion fre- quency decreases with the resistance of ferroelectric liquid crystal(FLC)layer following logf_i=- alogR_(LC)+b .The results are in good accordance with the reported experimental results. 相似文献
170.
Li Lianyun Hu Jiancheng Bin Lianghua Li Lixia Zha Jikun Xu Liangguo Zhang Zhen Zhai Zhonghe Shu Hongbing 《科学通报(英文版)》2001,46(24):2073-2077
TRAIL is a tumor necrosis factor family member that selectively induces apoptosis of cancer cells but not of normal cells. To develop TRAIL into a potential cancer drug, three different sizes of soluble TRAIL fragments, including sTRAIL(74—281), sTRAIL(95—281) and sTRAIL(101—281), were expressed in E. coli and purified to homogeneity. Apoptosis assays indicated that sTRAIL(95—281) and sTRAIL(101—281), but not sTRAIL(74—281), can potently induce apoptosis of various cancer cell lines in 6 h, suggesting that the N-terminal fragment of aa101 has inhibitory effect on TRAIL-induced apoptosis. Moreover, we found that some cancer cells were resistant to TRAIL and the resistant cells could be converted into sensitive cells by treatment with the protein synthesis inhibitor cycloheximide, suggesting that one or more short-lived proteins are responsible for cells’ resistance to TRAIL. 相似文献