相邻建筑物地基沉降影响的处理方法     

李建 《大同职业技术学院学报》2005,(4)

对于相邻建筑物在地基中产生的沉降影响问题,本文从新旧建筑物的结构类型、地质情况、荷载等方面进行了分析和探讨,提出了对不同类型结构的处理方法。  相似文献   

无机高分子混凝剂聚硅硫酸盐的制备   总被引：1，自引：1，他引：1  

聂丽君  李琳  李红梅  李春晖  刘艳文  杨建设 《茂名学院学报》2005,15(3):8-11

无机高分子絮凝剂是城市用水和工业废水处理的有效药剂。在研究聚合硫酸铁(PFS)合成工艺的基础上,设计出一套合成无机高分子混凝剂聚硅硫酸铁(PSPFS)和聚硅硫酸铝铁(PSAFS)的方法。采用正交试验法,通过模拟浊水的混凝试验,确定Fe/Si摩尔比、Na2SiO3.9H2O溶液聚合时间、反应时间、反应温度和Al/Si摩尔比等最佳参数。  相似文献   

混凝法处理含油废水的研究   总被引：1，自引：0，他引：1  

苗燕  刘鑫  李芳 《大连大学学报》2011,32(3):28-32

以混凝法对实验室的含油废水的进行处理。处理过程中采用两种无机混凝剂与一种有机高分子混凝剂混用,达到絮凝除油,消除有机物质。以混凝剂的加入量,pH对混凝剂的影响为主要影响因素,研究不同混凝剂对此含油废水的处理效果。  相似文献   

厂前就地回水应用及设想     

容振华 《大众科技》2014,(9):97-99

由于大厂矿区周边没有固定水源,再生资源分公司2008年完善内部生产用水改造以后,生产能正常维持。随着7#坝尾砂矿回采的枯竭,又进行内部工艺流程改造,选矿一车间便成为二车间和三车间的尾矿再处理车间,选矿生产用水问题便将成为生产组织的关键问题,解决好Φ24米循环回水处理系统,将是确保该公司生产组织的根本。  相似文献   

Experimental study and numerical simulation of the sludge concentration in a sedimentation tank     

SHENG Ming-jun  MA Lu-ming  ZHU Wei  WANG Hong-wu 《重庆大学学报(英文版)》2007,6(1):30-34

Sedimentation tanks and clarifiers play a significant role in an active sludge system, and the efficiency of the whole system is closely related with the design and operation of the sedimentation tanks. This paper focuses on the sludge concentration in each cross-section of the sedimentation tank. We measured the sludge concentration to explore its distribution inside the tank, carried in-situ tests to research the fluid pattern and real operational rules of the sedimentation tank. We also used the computational fluid dynamics (CFD) software, PHOENICS 3.5, to simulate the solid-liquid two-phase fluid inside the tank and describe the sludge concentration distribution. The numerical results indicate obviously a sludge-water interface and a compression interface inside the sedimentation tank, a stratified sedimentary region with uniform concentration and a compression region with high concentration at the bottom of the tank. Although the simulated concentrations deviated slightly from those of in-situ tests, they were still acceptable for identifying the sludge interfaces and fluid pattern inside a sedimentation tank, which are important parameters for optimizing the tank size and improving the settling efficiency.  相似文献   

南京汤山地区的洞穴和旅游   总被引：1，自引：0，他引：1  

王永慧 《南京晓庄学院学报》2003,19(4):76-79,88

汤山葫芦洞是在早更新世时期地下水位稍下处,由混合溶蚀作用形成的,中更新世被抬升到地下水位以上并被揭开,堆积了来自近源的堆积物,其中已发现两具颅骨化石。与洞穴堆积一起组成了具有特色的洞穴文化旅游的珍贵资源。 由于开发中洞穴文化旅游的内涵深度不足,建议:对洞穴旅游资源再深入评议,丰富洞穴文化旅游内涵、协调和作好洞穴、阳山碑材和温泉三大资源的整合工作。  相似文献   

炼油废水H-O-R工艺中试运行探索     

张冬梅  王培风  沈豪祥  李宗宝  肖锦 《茂名学院学报》2002,12(3):31-34

模拟茂石化炼油废水生化处理系统 ,在二沉池中加入软性纤维添料 ,使之具有反硝化脱氮的功能后 ,用H -O -R工艺 (即水解酸化 -好氧 -脱氮 )的方式运行 ,不但使泥水分离效果更好 ,而且改进了传统的脱氮工艺 ,弥补由于原工艺中构筑物的原因造成废水无法回流脱氮的缺陷。中试运行结果表明 ,COD、Oil、Ar -OH、NH3 -N、S2 -的降解率分别达到 90 % ,97% ,99% ,84 % ,99% ;当供给适量C源、DO <1mg/L、温度在 2 5～ 4 0℃时 ,NOx -N降解率可达 75～ 90 % ,各污染指标均达到国家和DB4 4 / 5 6 - 92地方排放标准  相似文献   

中国健康老年前期人血沉参考值与地理因素的多元回归分析     

葛淼 《科技通报》1998,14(6):446-449

为制定中国健康老年前期人血沉参考值的统一标准提供科学依据 ,本文收集了中国各地用温氏法测定的健康老年前期人血沉参考值 ,并对其与地理因素的关系进行了研究 ,发现海拔高度是影响健康老年前期人血沉参考值最主要的因素 ,海拔高度与健康老年前期人血沉参考值的负相关性很显著 .用多元回归分析的方法推导出了两个回归方程 .如果知道了中国某地的地理因素 ,就可以用这两个回归方程估算该区的健康老年前期人血沉参考值  相似文献   

产水系统优化运行研究(英文)     

张宏伟  镡新  陈春芳 《天津大学学报(英文版)》1999,(2)

从产水系统的全局出发,综合考虑了系统中混凝、沉淀、过滤等各处理单元的运行状态及相互关系.通过分析水厂产水过程中反冲洗用水、沉淀池排泥、混凝投药率对制水成本的影响,提出产水系统优化运行的费用函数,研究了优化模型的解法,并编制了相应的求解程序.使用实际数据进行考核计算,结果表明该优化计算方案可使制水成本显著降低.  相似文献   

The effects of transport by pneumatic tube system on blood cell count,erythrocyte sedimentation and coagulation tests     

Fatma Emel Ko?ak  Mustafa Y?ntem  ?zlem Yücel  Mustafa ?ilo  ?zlem Gen?  Ayfer Meral 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(2):206-210

Introduction:

Today, the pneumatic tube transport system (PTS) is used frequently because of its advantages related to timing and speed. However, the impact of various types of PTS on blood components is unknown. The aim of this study was to examine the influence of PTS on the quality of routine blood cell counts, erythrocyte sedimentation, and certain blood coagulation tests.

Materials and methods:

Paired blood samples were obtained from each of 45 human volunteers and evaluated by blood cell count, erythrocyte sedimentation, and several coagulation tests, including prothrombin time (PT) and activated partial thromboplastin time (aPTT). Blood samples were divided into 2 groups: Samples from group 1 were transported to the laboratory via the PTS, and samples from group 2 were transported to the laboratory manually. Both groups were evaluated immediately by the tests listed above.

Results:

The blood sample test results from groups 1 and 2 were evaluated and compared. No statistically significant differences were observed (P = 0.069–0.977).

Conclusion:

The PTS yielded no observable effects on blood cell counts, erythrocyte sedimentation, or PT and aPTT test results. We concluded that the PTS can be used to transport blood samples and yield reliable results for blood cell counts, erythrocyte sedimentation, and several coagulation tests.  相似文献