多金属矿区钻孔灌注桩的施工及质量控制

多金属矿区钻孔灌注桩施工中受到矿床地质沉降和断层等因素的影响,导致桩加固和夯击等施工的难度较大,进行多金属矿区钻孔灌注桩的施工的具体方案分析及质量控制分析,施工项目主要包括了矿区钻孔清方工程、支撑柱工程、裂隙充填工程、锚杆支护工程等。首先进行施工概况描述,然后进行多金属矿区钻孔灌注桩施工关键技术分析,提高施工质量,建立、健全安全质量保障体系和质量控制体系,施工过程中抓安全出效率,保障了施工有序进行。     

3 200 m3高炉工程出铁场耐热混凝土施工

概述了出铁场耐热混凝土的施工技术.针对施工中出现的问题,采取了相关的施工技术,解决了耐热混凝土浇筑及与普通混凝土接缝处理等施工难题,确保了施工质量.     

深基坑工程的风险分析

由于勘察设计的局限性、施工过程中安全意识差、交叉施工等特点,深基坑工程存在地质条件、环境条件、设计方案、施工质量等风险源。深基坑风险分析是对风险的危害性进行系统识别和评估,为施工决策提供依据。     

PBA洞桩法在地铁车站施工中的应用

本文主要对沈阳地铁九号线二十标皇姑屯站的施工技术进行分析,主要从施工方法、特点、施工步骤及核心技术等制定了关键的技术,解决了实际施工中存在的施工环境、地质等因素的影响,降低了施工风险。同时介绍了PBA洞桩法在地铁车站施工中的实际应用,希望可以给相关研究人员提供借鉴。     

折返式超长斜坡道快速施工技术

介绍了折返式超长斜坡道施工中利用斜坡道折返点,逐段向上反掘通风天井,光面爆破技术,掘进与支护平行作业,无轨施工设备配套使用的施工技术。通过在某硫铁矿斜坡道工程中成功的应用,有效地解决了超长斜坡道施工中通风、排水及供电等难题,极大地提高了施工速度,缩短了施工工期,很好解决了斜坡道施工工期占整个矿山建设周期长的问题。     

步进炉改造深基坑支护技术的应用

介绍了天津天铁轧二制钢有限公司在步进式加热炉施工过程中,应用钢板桩和砼挡土墙联合支护的深基坑施工技术,成功地完成了施工任务。这一创新实用技术值得在冶金等行业的深基施工中推广应用。     

住宅建筑斜屋面施工的质量保证措施

在住宅建筑斜屋面施工过程中,要从设计、施工、重要部位等环节加强管理,以确保住宅建筑斜屋面的施工质量.     

谈清水混凝土施工技术

本文从模板施工、混凝土浇筑、加强现场管理等方面详细阐述了工业厂房工程中清水混凝土施工技术及施工质量控制要点,保证混凝土施工建筑,表面平整、色泽一致.     

280排水平峒岩溶施工技术研究

结合工程实际,介绍了在岩溶巷道施工中遇到的岩溶问题,在采取超前支护、护帮固底等技术措施后,确保了施工安全和施工质量,取得了良好的施工效果。     

论地质超前预报技术在广西大新锰矿的应用

在矿山建设工程施工过程中,超前探测和准确地预测预报,可以有效地预防工程施工中可能形成的灾害性事故,保证施工安全及工程质量,提高施工效率,缩短施工工期,节约投资等。对大新锰矿井巷工程施工中局部地质条件复杂地段采用的地质超前预报的常用方法及优缺点进行简要介绍。     

Of Perspectives,Issues, and Politics in Materials Technology

Recognizing the pervasive importance of materials science and engineering (MSE) to practically every facet of man’s life, this lecture takes a broad view of the origin and technical trends and achievements in MSE, briefly reviewing its history and relationship to society over many millennia, to the present day, with specific examples. Major emphasis, however, is placed on modern MSE as related to current national issues, using as illustrations of the latter natural resources, industry and the economy, research and development, education, and technology transfer. The discussion of these areas leads to consideration of the role of the Federal Government and the importance of and need for a coherent national policy to deal with critical issues, many of which are listed herein. Some important steps by the Government fostering high level coordination as well as cooperation among government, industry, and academe are cited. Having thus illustrated the pervasive and vital impact of MSE on society, and its current esteemed recognition and position of influence, the lecture concludes that in this period of global change — social, economic, and technological — there is a challenge to MSE to respond beneficially to societal needs more than ever before. The opportunity and mechanisms now exist. Greater participation in the public and political arenas, with mutual education, is indicated. NATHAN E. PROMISEL received his Bachelor of Science and Master of Science Degree at the Massachusetts Institute of Technology, did his doctorate work at Yale University, and received an Honorary Doctor of Engineering Degree at Michigan Technological University. He became Assistant Lab Director at International Silver Company, leaving in 1940, and Chief Materials Scientist and Engineer (aeronautics and weapons) and Materials Research Coordinator for the Department of the Navy, leaving in 1966. He is presently an International Consultant. Dr. Promisel has been a long-time member of the National Materials Advisory Board of the National Academies of Science and Engineering, and from 1966 to 1974 was its Executive Director. He was also a Member of the Office of Technology Assessment (Congress) Materials Advisory Committee, as well as Chairman or Member of numerous other Government and public technical groups. These included being Chairman of the U.S. Group for the Science Exchange Program with the U.S.S.R., for materials and electrometallurgy, and serving as Chairman of the NATO Aerospace Research Group (Materials and Structures). Dr. Promisel is a member of the National Academy of Engineering; Past President, Fellow, and Honorary Member, American Society for Metals; Past President and Founding Member of the Federation of Materials Societies; Honorary Member of AIME, ASTM, and SAE (Materials Division); Fellow of British Institute of Metals and SAMPE. He has presented distinguished lectures to The Electrochemical Society and ASTM. Dr. Promisel has received numerous awards and is the holder of two patents. He has written 65 technical papers and has been the author, contributor, or editor of eight books.     

废锂电池酸浸液非萃取除杂研究

主要研究了废锂电池酸浸液杂质除杂原理,采取“两段酸浸—中和除Fe、Al—絮凝除F—深度除杂”非萃取除杂工艺。在除杂过程中,由于酸浸液含高浓度Ni、Co、Mn离子,中和剂的种类和浓度将影响Ni、Co、Mn的损失率。通过工艺控制及中和剂调试,选择10%CaCO₃作为除Fe、Al、F中和剂,Fe、Al、Cu、F含量可分别从0.20、9.76、0.58、1.66 g/L降至0.01、0.02、0.01、29.86 mg/L,达到三元前驱体溶液杂质标准要求。此时,Ni、Co、Mn的损失率分别仅为0.96%、0.04%、0.01%,均在接受范围之内。     

唐钢高速线材厂控冷工艺及装置的技术分析

介绍了唐钢高速线材厂设备引进情况与生产工艺流程,对该厂的水冷区的组成、布置、工作方式、导管结构特点及安装固定特点等结构技术特性,水冷工艺温度及特性曲线与温度控制进行了分析介绍,阐述了夹送辊的工作特点和工作方式,对吐丝机的机构特点、平衡、冷却及铁皮清除方式进行了分析介绍,此外还对风冷运输线的组成、布置、运行方式等技术结构特性进行了阐述。     

矿产资源科学开采及其复杂性研究

在“碳达峰”、“碳中和”的目标背景下,绿色低碳、清洁高效成为资源开采的新要求,也对科学开采这一复杂系统问题的研究提出了新的方向。阐述了矿产资源开采理念的发展演化,综述了近年来国内外在科学开采方面的研究现状,构建了安全、高效、绿色、低碳、经济、科学管理“六位一体”的科学开采体系,丰富了科学开采的内涵和框架。从复杂科学问题的判断标准、科学开采体系的特征两方面进行推断,得出科学开采属于复杂问题,承载科学开采复杂问题的系统是复杂系统。以复杂科学的思路研究科学开采的复杂性,构建科学开采复杂系统模型,从顶层设计、中层连接和底层基础3个层次思考了实现科学开采的新途径,为实现矿产资源的科学开采提供了新的发展方向。     

钢铁制造流程炼铁区段耗散结构的解析

为了研究钢铁制造流程耗散结构的本质及其特征,以高炉炼铁区段为对象,研究解析了多工序协同动态运行条件下的耗散结构优化问题.由料场、焦化、烧结、球团、高炉等工序所组成的炼铁区段,不仅是钢铁制造流程中重要的物质/能源转换中心,也是全流程动态有序、协同连续运行的关键和基础环节.炼铁区段的物理本质是铁素物质流在碳素能量流的驱动和...     

Distribution of 14 elements in tissues and organs of oceanic seabirds

The concentrations of 14 trace elements (Li, V, Mn, Co, Cu, Zn, Se, Rb, Sr, Ag, Cd, Cs, Pb, and Hg) were determined in tissues and organs of three species and in the liver of 11 species of seabirds. Comparatively high concentrations of Li, Co, Sr, and V were found in the femur. Cd, Se, Cu, and Mn concentrations were relatively higher in the kidney than in other tissues and organs. Rb, Cs, and Pb concentrations were rather uniform among tissues. Concentrations of essential elements such as Mn, Cu, and Co were comparable among seabird species, except high Cu concentrations in northern giant petrel. Among nonessential elements, concentrations of Cd and Hg were variable according to seabird species. Pb levels were low in all the species. High Se levels (100 microg/g dry weight) were found in the liver of black-footed albatross and grey petrel. There were significant positive correlations between Se and Cd concentrations in three species and between Se and Hg in black-footed albatross, suggesting that Se has an antagonistic action on the toxic effects of Cd and Hg. Concentrations of Li, V, Ag, and Cs were usually low (less than 1 microg/g dry weight).     

Selection of tumor antigens as targets for immune attack using immunohistochemistry: protein antigens

The relative expression of mucin antigens MUC1, MUC2, MUC3, MUC4, MUC5AC, MUC5B, and MUC7 and glycoprotein antigens KSA, carcinoembryonic antigen, prostate-specific membrane antigen (PSMA), HER-2/neu, and human chorionic gonadotropin-beta on different cancers and normal tissues is difficult to determine from available reports. We have compared the distribution of these antigens by immunohistology on a broad range of malignant and normal tissues. MUC1 expression was most intense in cancers of breast, lung, ovarian, and endometrial origin; MUC2 was most intense in cancers of colon and prostate origin; and MUC5AC was most intense in cancers of breast and gastric origin. MUC4 was intensely expressed in 50% of cancers of colon and pancreas origin, and MUC3, MUC5B, and MUC7 were expressed in a variety of epithelial cancers, but not so intensely. KSA was intensely and uniformly expressed on all epithelial cancers; carcinoembryonic antigen was expressed in most cancers of breast, lung, colon, pancreas, and gastric origin; and PSMA was expressed only in cancers of prostate origin. Human chorionic gonadotropin-beta was expressed on the majority of sarcomas and cancers of breast, lung, and pancreas origin, although intense staining was not seen. Staining on normal tissues was restricted to one or many normal epithelial tissues ranging from MUC3, MUC4, and PSMA, which were expressed only on epithelia of pancreas, stomach, and prostate origin, respectively, to MUC1 and KSA, which were expressed on most normal epithelia. Expression was restricted to the secretory borders of these epithelia while stroma and other normal tissues were completely negative. These results plus the results of the two previous papers (S. Zhang et al, Int. J. Cancer, 73: 42-49, 1997; S. Zhang et al., Int. J. Cancer, 73: 50-56, 1997) in this series provide the basis for selection of multiple cell surface antigens as targets for antibody-mediated attack against these cancers.     

Microbial communities of printing paper machines

The microbial content of printing paper machines, running at a temperature of 45-50 degrees C and at pH 4.5-5, was studied. Bacteria were prevalent colonizers of the machine wet end and the raw materials. A total of 390 strains of aerobic bacteria were isolated and 86% of these were identified to genus and species by biochemical, chemotaxonomic and phylogenetic methods. The most common bacteria found at the machine wet end were Bacillus coagulans and other Bacillus species, Burkholderia cepacia, Ralstonia pickettii, and in pink slimes, accumulating in the wire area and press section, species of Deinococcus, aureobacterium and Brevibacterium. Paper-making chemicals also contained species of Aureobacterium, B. cereus, B. licheniformis, B. sphaericus, Bordetella, Hydrogenophaga, Klebsiella pneumoniae, Pantoea agglomerans, Pseudomonas stutzeri, Staphylococcus and sometimes other enteric bacteria, but these did not colonize the process water. Yeasts and moulds were not present in significant numbers. A total of 131 strains were tested for their potential to degrade paper-making raw materials; 91 strains were found to have degradative activity, mainly species of Burkholderia and Ralstonia, Sphingomonas and Bacillus, and enterobacteria produced enzymes which degraded paper-making chemicals. Stainless steel adhering strains occurred in slimes and wire water and were identified as Burkholderia cepacia, B. coagulans and Deinococcus geothermalis. Coloured slimes were formed on the machine by species of Deinococcus, Acinetobacter and Methylobacterium (pink), Aureobacterium, Pantoea and Ralstonia (yellowish) and Microbulbifer-related strains (brown). The impact of the strains and species found in the printing paper machine community on the technical quality of paper, machine operation, and as a potential biohazard (Hazard Group 2 bacteria), is discussed.     

Cancer and other causes of death among male and female farmers from twenty-three states

Occupation and industry codes on death certificates from 23 states for 1984-1988 were used to evaluate mortality risks among white and nonwhite, male and female farmers. Proportionate mortality and proportionate cancer mortality ratios were calculated using deaths among nonfarmers from the same states to generate expected numbers. Among farmers there were 119,648 deaths among white men, 2,400 among white women, 11,446 among nonwhite men, and 2,066 among nonwhite women. Deficits occurred in all race-sex groups for infective and parasitic diseases, all cancer combined, lung cancer, liver cancer, diseases of the nervous system, multiple sclerosis, hypertension, and emphysema. As reported in other studies, white male farmers had excesses of cancer of the lymphatic and hematopoietic system, lip, eye, brain, and prostate. Excesses of cancers of the pancreas, kidney, bone, and thyroid were new findings. Regional patterns were evident, particularly among white men. Significant excesses for accidents, vascular lesions of the central nervous system (CNS), and cancers of the prostate tended to occur in most geographic regions, while excesses for mechanical suffocation, non-Hodgkin's lymphoma, and cancers of the lip, brain, and the lymphatic and hematopoietic system were limited to the Central states. Increases among nonwhite men were similar to those in white men for some causes of death (vascular lesions of the CNS and cancers of the pancreas and prostate), but were absent for others (lymphatic and hematopoietic system, lip, eye, kidney, and brain). Women (white and nonwhite) had excesses for vascular lesions of the CNS, disease of the genitourinary system (white women only), and cancers of the stomach and cervix (nonwhite women only). Cancer of the buccal cavity and pharynx was slightly elevated among women, and white women had nonsignificant excesses of multiple myeloma and leukemia. Excesses for leukemia and non-Hodgkin's lymphoma occurred among white men and women, but not among nonwhites. Excesses for several types of accidental deaths were seen among all race-sex groups.     

Beyond intersubjectivity: Personalization and community.

In this article, personalization is defined as diverse forms of recognizing the other as a unique, responsive, inviolable, and valued subject, all of which are contingent upon community. The processes of personalization are depicted further in terms of (a) the dialectic of recognition and negation, (b) personal and impersonal epistemologies, (c) intentionality and fact, and (d) asymmetrical and mutual recognition. Good enough parenting may be understood in terms of varied forms of personalization, which contribute to psychosocial achievements--psyche-soma integration, sense of going on being or cohesion, self-continuity, sense of aliveness and being real, the capacity to make use of social reality, self-reflection, and emotional regulation. These forms of personalization are supported by the community's web of symbols--symbols that facilitate and represent recognition and appearance of the other as a unique subject. Given the relation between personalization and community, transference is reconceptualized as the patient's history of personalizing, impersonalizing, and/or depersonalizing interactions, as well as his or her desire for and fear of personalization and fellowship. (PsycINFO Database Record (c) 2010 APA, all rights reserved)