直燃型溴化锂冷温水机组的可行性研究

通过对直燃型溴化锂冷温水机组和电动式制冷机组及蒸汽双效溴化锂吸收式制冷机组的技术经比较,从机组的初投资、运行费用和能耗三个方面进行研究,得出结构论是：直燃型溴化锂冷温水机组只能在电力供应紧张和不允许采用燃煤锅炉的地区加以推广。     

溴化锂吸收式制冷机及其优缺点

分析溴化锂吸收式制冷机的制冷原理以及同电动压缩式制冷机的能耗对比，提出溴化锂吸收式制冷机虽然节电，但不节能。     

槽式聚光集热驱动吸收式空调系统研究

以太阳能单效吸收式空调系统为研究对象,选用太阳能槽式聚光集热器与溴化锂单效吸收式制冷机对100m2会议室进行夏季制冷、冬季制热、春秋季提供必要的生活热水性能分析.结合昆明当地气候条件和该会议室结构、朝向等因素对所选会议室进行全年能耗分析,结果为夏季冷负荷75W/m2、冬季热负荷50W/m2.根据理论分析结果以及经济实用性确定选用60m2抛物槽式聚光集热反射镜、23kW溴化锂吸收式制冷机、15kW风机盘管作为系统参数,为槽式聚光集热与吸收式制冷机组相结合的系统性能研究提供理论依据.     

溴化锂吸收式制冷机的性能分析

分析比较了溴化锂吸收式制冷机的效率，经济性及其对环境的污染，指出溴化锂吸收式制冷目前在我国不宜推广使用。     

新型循环直燃机研究

为了提高直燃型溴化锂吸收式制冷机能源总利用率和吸收式制冷机组的性能系数,对其原有循环进行了改进,利用排烟热回收发生器对烟气中的余热进行了回收,以此作为吸收式制冷机的热源,通过制冷循环达到制冷的目的．进行了热力计算和样机设计并进行了初步实验研究．通过热回收,一次能源效率提高近3%．循环模拟和初步实验研究表明,采用热回收循环的直燃机取得了较好的节能效果．     

溴化锂吸收式制冷机换热管清洗探讨

影响溴化锂吸收式制冷机效果的因素有很多,其中换热管污垢的影响是不可忽视的。溴化锂吸收式制冷水机运行一段时间后,在传热管内壁与外壁逐渐形成了一层污垢。从传热学角度来看：污垢系数越大,则热阻越大,传热性能越差,机组的制冷量下降。溴化锂制冷机制冷量每年衰减约3%,其根本原因就是污垢的影响。因此,清洗传热管是非常必要的。     

溴化锂吸收式制冷机运行管理经验探讨

双效溴化锂吸收式制冷机在运行中存在着诸多问题、如果不重视运行管理工作,制冷量衰减得很厉害,有的机组只使用了几年就因制冷量衰减而报废了。我集团综合业务楼1998年安装使用了四台美国特灵公司生产的溴化锂制冷机组,溴化锂制冷机组一年只使用3-4个月,它的运行管理工作就显得尤为重要。每年都制定维护保养计划,按计划认真地维护保养机组。制冷机的气密性、溶液、冷剂、冷水、冷却水水质对制冷机的性能有很大的影响,运行管理中的解决办法及日常管理维护至关重要。     

溴化锂制冷机组结晶故障探讨分析及解决

分析了溴化锂溶液在溴化锂吸收式制冷机组在运行中出现结晶故障的原因,提出了在实际运行中避免结晶的各项管理措施及熔晶方法。对溴化锂制冷机结晶的原因进行了归纳,对日常的保养和管理工作提出了建议,并探讨总结了结晶的处理方法。     

热电冷三联供系统能耗与经济性分析

对三联供溴化锂吸收式制冷与蒸汽压缩式制冷作了能耗分析，计算了汽轮机在不同的初始参数条件下三联供溴化锂制冷的节煤量，并对这两种制冷方案进行了经济比较，得出三联供溴化锂制冷节能所需的条件.     

蒸气压缩式和溴化锂吸收式冷水机组的节能分析

在大、中型中央空调工程中,制冷机组的能耗一直是人们关心的问题．不少媒介宣称吸收式冷水机组比蒸气压缩式冷水机组节能,是中央空调发展的方向．本文通过对各种制冷机组的矿物能源能效比进行比较,并进行计算列表分析,结果表明溴化锂吸收式冷水机组比蒸气压缩式冷水机组节电不节能．图３,表１,参６．     

Markedness and its Interpretation in Language Use

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

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.