大功率风冷线风机噪声综合治理

介绍了高线风冷线风机噪声产生的原因,通过增加专业环保隔声装置,将风机噪声控制在国家标准要求的范围内,实现了打造绿色环保企业的目标。     

Electrochemical Preparation of Mg-Li-Zn-Mn Alloys by Codeposition

The electrochemical codeposition of Mg-Li-Zn-Mn alloys on a molybdenum electrode in LiCl-KCl-MgCl₂-ZnCl₂-MnCl₂ melts at 943 K (670 °C) was investigated. Preparation of the alloys by electrolysis was proven feasible in LiCl-KCl-MgCl₂-ZnCl₂-MnCl₂ melts from cyclic voltammograms and chronopotentiometry measurements. X–ray diffraction (XRD) indicated that Mg-Li-Zn-Mn alloys with different phases were prepared via galvanostatic electrolysis. The microstructure of typical α + Mg₇Zn₃ phase of Mg-Li-Zn-Mn alloys was characterized by an optical microscope and scanning electronic microscopy). The analysis by energy dispersive spectrometry showed that the addition of ZnCl₂ leads to the formation of intermetallic Mg₇Zn₃ distributed in grain boundaries, whereas Mn mainly existed on polygon particles. The results of inductively coupled plasma analysis showed that the chemical compositions of alloys were consistent with the phase structures of XRD patterns.     

宽带钢冷连轧机门户机架辊形设计研究

利用大型有限元软件Marc建立了轧制过程三维有限元仿真模型,以某1700mm冷连轧机为对象,分析了冷连轧机不同入口厚度和不同架次下的金属横向流动的特点,发现冷连轧机门户机架1#机架带钢厚度最厚、压下量最大,带钢金属横向流动最有条件,为实现凸度和平坦度的解耦创造了基础。提出了一种新的边降控制工作辊辊形即连续变锥度工作辊CVTR（Continuously Variable Taper Roll）,并配套使用VCR（Varying Contact Length Backup Roll）支持辊,提高了轧机的辊缝横向刚度,增强了轧机抵抗轧制力波动而保持不变的能力,为实现板形的良好控制创造了条件。     

食管癌后程三维适形放疗的临床疗效评价

Objective:The aim of our study was to evaluate the clinical results and acute side effects of late course three-dimensional conformal radiotherapy (3DCRT) for esophageal carcinoma.Methods:From January 2004 to October 2006,70 patients with esophageal carcinoma received late course 3DCRT.Their clinical data were analyzed retrospectively.The short-term clinical results,acute side effects,local control rates and survival rates were evaluated.Results:The complete response rate was 62.9%,partial response rate was 35.7%,and the overall response rate was 98.6%.The 1-,2- and 3-year local control rates were 77.1%,51.4% and 45.7%,respectively.The 1-,2- and 3-year overall survival rates were 75.7%,54.3% and 38.6%,respectively.The median survival time was 26 months.Conclusion:The technique of late course 3DCRT is an effective treatment for esophageal carcinoma and tend to improve the overall survival rate.     

双膦酸盐对骨转移癌骨痛治疗及血清钙磷影响

Objective: Bisphosphonates were widely used with the rate of malignant tumor with bone metastases increasing rapidly. The aim of this study was to evaluate zoledronic acid and pamidronic acid on treating osteatgia of malignant tumor with bone metastases and serum calcium, phosphorus and alkaline phosphorus movement. Methods: One Hundred cancer patients with bone metastases were diagnosed according to pathological and imaging methods. After zoledronic acid or pamidronic acid intravenous infusion one and two months, ostealgia degree, serum calcium, serum phosphorus and alkaline phosphorus were observed before bisphosphonates treatment, one and two months after treatment, respectively. Results:Ostealgia degree did not change significantly after diphosphonates treatment from one to two months (P ＞ 0.05). The linear correlation between serum calcium and serum phosphorus on bone metastases cancer patients before therapy was dismissed after bisphosphonates treatment one month and did not recover in two months. The incidence of hypo-calcium after diphosphonate treatment one month (54%) and two months (56%) were significantly increased than that before treatment (36%) (x2 = 6.55, P = 0.011; x2 = 8.05, P = 0.005). Serum calcium and serum phosphorus were both decreased after treatment one month (t = 4.39, P = 0.000; t = 2.50, P = 0.014) and two months (t = 4.32, P = 0.000; t = 2.49, P = 0.010). There had no difference between zoledronic acid and pamidronic acid on treating of ostealgia and serum calcium and phosphorus changing.Conclusion: Zoledronic acid and pamidronic acid can relief ostealgia of cancer patients with bone metastases and inducehypo-calcium, break the linear relationship between calcium and phosphorus. There have no difference between zoledronic acid and pamidronic acid on treating ostealgia and inducing hypo-calcium and hypo-phosphorus.     

高能复合射孔可能引起的管内窜原因分析及预防措施

针对2口井上返试油时,封隔已试层采用电桥或电桥+投灰工艺,目的层采用一体式高能复合射孔技术进行复合射孔后,地层产液液性及产能与下部已封闭层接近情况,采用措施验证,均为管内窜通。分析了桥塞失封的主要原因,提出使用高能复合射孔技术时的转层封隔要求。通过实验井进行验证,提出的措施能够预防高能复合射孔造成管内窜情况的发生。     

复杂边界裂缝性低渗油藏有限元试井

建立了复杂外边界裂缝性低渗透油藏渗流数学模型,使用迦辽金法推导模型的有限元方程。考虑井筒存储和表皮效应的影响,将井壁视为内边界、外边界封闭或定压,或为同时含封闭和定压边界的混合边界;使用Delaunay三角形对求解区域剖分,时间采用隐式方式离散;编制程序求解有限元方程得到不同时间的油藏压力分布,绘制不同类型边界的地层中一口井及地层中不同位置一口井的试井理论曲线;分析了启动压力梯度、外边界及井位置对井底压力的影响。结果表明有限元法处理复杂外边界可以取得较好效果。     

Tertiary-treated municipal wastewater is a significant point source of antibiotic resistance genes into Duluth-Superior Harbor

In this study, the impact of tertiary-treated municipal wastewater on the quantity of several antibiotic resistance determinants in Duluth-Superior Harbor was investigated by collecting surface water and sediment samples from 13 locations in Duluth-Superior Harbor, the St. Louis River, and Lake Superior. Quantitative PCR (qPCR) was used to target three different genes encoding resistance to tetracycline (tet(A), tet(X), and tet(W)), the gene encoding the integrase of class 1 integrons (intI1), and total bacterial abundance (16S rRNA genes) as well as total and human fecal contamination levels (16S rRNA genes specific to the genus Bacteroides ). The quantities of tet(A), tet(X), tet(W), intI1, total Bacteroides , and human-specific Bacteroides were typically 20-fold higher in the tertiary-treated wastewater than in nearby surface water samples. In contrast, the quantities of these genes in the St. Louis River and Lake Superior were typically below detection. Analysis of sequences of tet(W) gene fragments from four different samples collected throughout the study site supported the conclusion that tertiary-treated municipal wastewater is a point source of resistance genes into Duluth-Superior Harbor. This study demonstrates that the discharge of exceptionally treated municipal wastewater can have a statistically significant effect on the quantities of antibiotic resistance genes in otherwise pristine surface waters.     

建筑用纺织材料的应用研究进展

总结纺织材料在建筑领域中的应用研究进展。通过介绍建筑用纺织材料的结构特点及优势,探讨了纤维增强复合材料、隔声隔热材料、帆布材料、膜结构材料、防水材料、防污自洁膜材和装饰用材料在建筑领域中的应用,指出建筑用纺织材料的发展潜力和开发策略是引进技术提高生产制造水平、有效利用新型天然纤维、开发智能建筑用纺织品,认为,传统建筑材料与纺织材料相互结合、共同促进是未来的发展趋势。     

铅酸蓄电池的BOM构建

本文针对铅酸蓄电池的结构以及制造工艺,较为详细地描述了BOM（物料清单）的构建方式。根据生产实际以及数据管理两方面的特点提出标准电池层,并且把建立该层次的各种物料详细加以分析,探讨了每一种物料的共性与特点,力求真正做到结合生产实际。