脉冲放电等离子体催化脱硫技术的试验研究

利用１０＾－９ｓ高压脉冲将ＣＯ２部分分解为ＣＯ，使用具有选择性的催化剂，由脉冲放电产生的部分高能电子提供反应所需能量，将烟气中的ＳＯ２还原为单质硫，在常温下进行的试验结果表明：在气体流量为７００Ｌ／ｈ时，脱硫率达９０％以上，而能耗只有２．７Ｗ．ｈ／ｍ＾３左右，脱硫率随脉冲电压频率的增加而增加， 在一最佳值，脱硫率随气体流量的增加而减小，当流量大于某一值时，这一影响更加明显。     

脉冲介质阻挡放电降解三氯乙烯的研究

研究了不同操作条件下脉冲介质阻挡放电等离子体对三氯乙烯的降解效果,通过红外分析探讨了降解的反应历程.结果表明:当载气为N2时,脉冲介质通过阻挡放电等离子体可实现三氯乙烯的有效降解,降解率随放电参数及气体流量的变化而变化,在保证体系能量效率最大的基础上可获得三氯乙烯降解的最佳处理条件,即输入电压25 V、脉冲频率500 Hz、脉冲占空比50％、放电间隙5 mm、气体流量300 mL/min;当载气中含O2时,三氯乙烯的降解率随输入电压的变化而变化,即输入电压小于25 V时,三氯乙烯降解率随O2的增加而提高,输入电压大于25 V时,三氯乙烯降解率随O2的增加而下降.三氯乙烯降解过程中会产生CHCl2 COCl、CCl3-CN或ClCH2CH2NH2,终产物中除含有HCl、CO2和CO外,还含有COCl2.     

生物滴滤法脱除废气中SO_2工艺的研究

优化生物滴滤塔的性能,以提高其对SO2废气的处理效率.在单因素实验的基础上,以气体流量、SO2浓度、温度及pH值作为考察因素,通过设计正交试验,研究其脱硫最佳工艺条件;在最佳工况条件下探讨不同入口浓度、不同填料层高度及喷淋量对脱硫效率的影响.结果表明,各因素对SO2去除率影响大小次序为SO2浓度>温度>气体流量>pH值;最佳工艺条件为气体流量0.9m3/h,SO2浓度1 000mg/m3,pH值2.3~2.4,温度28℃.脱硫率随填料层高度增加而增大, 30L/h喷淋量的脱硫效果较优于24L/h,并且生物滴滤法比较适合于低浓度脱硫.     

生物强化法提高生物塔烟气同时脱硫脱氮性能的实验研究

研究采用人工复配功能菌的生物强化法提高生物膜填料塔烟气同时脱硫脱氮性能,对入口气体SO_2和NO_x的浓度、气体流量、循环液流量等因素对功能菌复配前后生物膜填料塔烟气同时脱硫脱氮效率影响进行实验.结果表明,在入口气体SO_2和NO_x的质量浓度分别为1 500~3 000 mg/m3和1 400~1 600 mg/m3,气体流量为0.2 m3/h,循环液流量为9.0 L/h的最优条件下,功能菌复配后生物塔的脱氮率达到62.03%,比复配前(44.81%)提高了17.22个百分点,而生物塔的脱硫率在复配前后均为100%.     

新型复合式浆态床内气体停留时间分布及模型

由空气-水、10%K2CO3溶液、20%K2CO3溶液、液体石蜡油构成气液两相体系,常压下表观气速为1～20 cm/s、静态液位200～550 mm、液体循环量0～240 L/h时,采用脉冲实验法测量一种特殊结构的浆态床反应器内气体停留时间分布.考察了操作参数和液体性质对浆态段的气体停留时间分布及返混程度的影响.结果表明:流型对停留时间分布的影响较大.气体平均停留时间随液体循环量和液体黏度的增加而增大;气体返混程度随静态液位增加而减小,随液体表面张力增加而增大.表面张力是影响返混程度的主要因素.同时建立相应的数学模型,得到停留时间密度分布函数,实验值与模型预测值吻合较好.     

电晕放电自由基注入提高烟气脱硫效率的研究

为提高脉冲电晕放电烟气脱硫效率,利用脉冲电晕放电脱硫反应器,采用自由基注入技术,研究氨气和水蒸气对电极放电特性的影响,以及氨、羟基自由基注入和一氧化氮存在对脉冲电晕放电烟气脱硫效率的影响.实验结果表明,氨气注入时,电晕电流略有增加,水蒸气注入时,电晕电流降低.采用电晕放电氨、羟基自由基注入系统,能耗增加约0.36 W·h/m3,但可提高脉冲电晕放电烟气脱硫效率约14%,总脱硫效率达到90%;NO将促进SO2的热化学反应脱除,烟气中注入体积分数为125×10-6NO,二氧化硫脱除率可提高约15%,能耗小于2.4 W·h/m3时,SO2脱除率大于90%.     

气体种类对煤制气制备碳化铁的影响

主要研究了以煤制气为还原剂制备碳化铁过程中气体种类对还原度、金属化率、碳化铁率的影响.研究结果表明:CO+CO2混合气体还原铁矿石可以生成碳化铁,随CO/CO2比值的增加碳化铁率也增加;还原气体中氢气的含量在10%～20 %范围为宜.     

温度对煤造气制备碳化铁的影响

研究了以煤造气为还原剂制备碳化铁过程中温度对还原度、金属化率、碳化铁率的影响,实验条件为压力0.3 MPa、反应时间180 min、还原气体中CO/CO2分别为3和1.5,反应温度在550～700℃之间变化.通过实验研究得到如下结论:产物的还原度、金属化率随温度的升高而逐渐增大;碳化铁率在600℃时最小;在气体成分达到一定还原势(CO/CO2=3)的条件下,700℃时碳化铁率最高;而在CO/CO2=1.5时,高温下不利于碳化铁的生成.     

燃煤在O_2/CO_2方式下SO_2生成特性的研究

研究了合山煤在O2 /CO2 方式下SO2 的生成特性 .结果表明在O2 /CO2 方式下 ,由于燃煤的燃烧特性和钙基吸收剂的煅烧分解特性不同于传统燃烧方式 ,SO2 的生成速度加快 ,生成量较空气气氛下大为减少 ,钙基吸收剂的脱硫率随温度升高而增加 ,表明O2 /CO2 方式有利于钙基吸收剂高温脱硫     

定-转子反应器在水脱氧工艺中的应用研究

在定-转子反应器中采用N₂-水脱氧、CO₂-水脱氧两个体系脱除水中的溶氧，考察了转子转速、液体体积流量以及气体体积流量对脱氧率和传质系数的影响，并对比了两个水脱氧体系的脱氧效果。实验结果表明：脱氧率随转子转速和气体体积流量的增加而升高，随液体体积流量的增加而降低；传质系数随着转子转速、液体体积流量、气体体积流量的增加而增加；此外，N₂-水脱氧体系的脱氧效果要优于CO₂-水脱氧体系。     

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.     

Features of Women's language

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.     

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.