贵溪冶炼厂周边土壤重金属污染研究

为了解贵溪冶炼厂周边土壤的污染情况,防止重金属再污染和修复已污染土壤,采集贵溪冶炼厂周边不同方向的土壤,对其重金属含量的空间分布规律进行分析,并运用单因子污染指数和内梅罗综合污染指数对该区域重金属污染水平进行评价,结果表明,研究区域土壤受到一定程度的重金属污染。从单因子污染指数可知,该区域土壤受到极为严重的Cu、Cd污染,部分区域土壤As、Hg的污染达到警戒限水平,元素污染程度:Cu>Cd>As>Hg。从综合污染指数看,研究区域东北、南方向为轻度污染,西南与西北方向为中度污染,西面为重度污染。     

汽车污染与环境保护

汽车对环境的污染主要在三个方面：汽车噪声对环境的污染、汽车尾气对大气的污染、汽车车内环境的污染。本文就防治汽车对环境的污染进行综合性论述。     

贵州黎平某硅厂周边土壤重金属含量分析与污染状况评价

对黎平县工业区某硅厂土壤重金属Cu、Zn、Pb、Cd含量进行初步调查,并采用单因子污染指数法、内梅罗综合污染指数法对土壤重金属进行污染评价。结果表明：该硅厂周边土壤已受到一定程度的重金属污染,以Cu污染最为严重,已达中度污染水平,其余3种元素为轻度污染。     

山西省水环境的非点源污染及防治对策

随着山西省国民经济的发展和自然资源的开发,水环境的非点源污染问题日益严重.文章从山西省的实际情况出发,分析了水环境的非点源污染类型,主要是土壤侵蚀型污染、农业污染、生活污染、矿区污染、城市地表径流污染等,非点源污染促使水体物理型污染严重、造成水库富营养化、土壤退化、进而威胁人体健康,给建筑物及财产带来直接损失等,并在此基础上,探讨了控制非点源污染的对策.     

城市汽车排放污染的影响因素及防治污染研究

汽车排放污染是汽车三大污染之一。随着汽车保有量的增加汽车污染已变成公害,严重地污染环境,影响着人们的生活。防治污染、净化环境是当今社会的重要课题。本文通过分析汽车排放污染的影响因素,提出了减少汽车排放污染的对策。     

黎平工业区硅厂周边土壤重金属污染评价

对黎平县工业区某硅厂土壤重金属Cu、Zn、Pb、Cd含量进行初步调查,并采用单因子污染指数法、内梅罗综合污染指数法对土壤重金属进行污染评价。结果表明：该硅厂周边土壤已受到一定程度的重金属污染,以Cu污染最为严重,已达中污染水平,其余3种元素为轻污染。     

乐清市农业面源污染现状及其防治对策

随着我市经济社会的快速发展,农业面源污染已逐渐成为该市主要污染源之一。文章以乐清市为研究对象．从畜牧养殖,种植耕作、水产养殖和农村居民生活产生的废物等方面系统地分析了该市农业面源污染现状,并从控制畜禽养殖污染,水产养殖污染、秸秆和农膜污染．农药与化肥污染、农村居民生活废弃物污染等方面系统地提出了该市农业面源污染的应对对策。     

瑶湖流域非点源氮、磷负荷估算及其控制对策

利用ArcGIS10.0软件,划分了瑶湖流域的范围,并提取了土地利用类型及其面积,在流域调查的基础上,参考国内外相关研究方法,按照农村与城镇生活污染(A类污染)、畜禽养殖污染(B类污染)、村镇与农业径流污染(C类污染)和水产养殖污染(D类污染)等4种污染来源,估算了瑶湖流域的非点源氮、磷污染负荷。结果表明:入湖氮、磷总负荷分别为346.3 t/a和102.8 t/a;B类污染是氮和磷污染的主要来源,其污染负荷占总负荷的比例分别为73.1%和85.3%;南昌县对B类污染的TN和TP贡献率大于青山湖区;南昌县对A类污染的TN和TP贡献率稍小于青山湖区;对于C类污染,TN贡献率大小为:水田村镇水浇地,TP贡献率大小为:村镇水田水浇地。在此分析基础上,提出了非点源N、P污染负荷控制对策。这为瑶湖流域水污染控制提供了理论依据和数据支撑,同时也为政府制定区域社会经济发展规划提供了决策依据。     

绿色政府公共投资的结构选择

根据基础设施、教育科研、污染治理三个领域公共投资的增长效应和环境效应的不同,将公共投资的结构划分为四种类型:低速增长、重度污染;低速增长、轻度污染;高速增长、重度污染;高速增长、轻度污染。绿色政府的最优选择应当是高速增长、轻度污染的公共投资结构。     

企业污染与治理对策

本文主要从我国工业企业污染排放现状、人们对治理企业污染的认识、污染治理与发展的关系等方面对我国治理企业污染的必要性和紧迫性进行剖析,并结合本地工业企业污染治理实际,提出促进企业污染治理的具体措施及政策建议。     

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.     

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.     

A computer generator for randomly layered structures

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