流量测量准确性的现场验证及其解决方案

流量计示值准确性的现场验证是交工验收的重要内容。介绍了现场校验法，质量平衡法，热量平衡法，设备能力法等流量测量系统的校验方法以及一些技巧。     

Control of Titanium Alloy Thin Plate Welding Distortion by Trailing Peening

The technology of trailing peening is a kind of promisingly bran-new technology which can be used to control weldingstress and distortion of Ti alloy thin plate. Control of TC4 Ti alloy thn plate welding stress and distortion underthe condition of convent     

艺术建筑设计的探索

通过徐州一中艺术楼的设计实践，寻求优美而独特的艺术形象，并用纯几何形体的组合来达到功能与形式的完美统一。     

磨矿分级自动控制系统在选矿厂的运用

介绍了磨矿分级自动控制系统的控制原理、功能，以及在实际生产中的应用效果，以期推动磨矿自动系统在矿山中的应用。     

关于影响面条食用品质相关因素的探讨

从小麦生产概况、面条发展历史和工艺、国内外对面条食用品质的研究3个方面,分析了我国面条工业发展缓慢的原因,提出了小麦育种-面粉工业-制面工业,3个环节紧密配合,协调发展,才能形成良性循环的新思路。     

Phenotypic analysis of antigen-specific T lymphocytes

Identification and characterization of antigen-specific T lymphocytes during the course of an immune response is tedious and indirect. To address this problem, the peptide-major histocompatability complex (MHC) ligand for a given population of T cells was multimerized to make soluble peptide-MHC tetramers. Tetramers of human lymphocyte antigen A2 that were complexed with two different human immunodeficiency virus (HIV)-derived peptides or with a peptide derived from influenza A matrix protein bound to peptide-specific cytotoxic T cells in vitro and to T cells from the blood of HIV-infected individuals. In general, tetramer binding correlated well with cytotoxicity assays. This approach should be useful in the analysis of T cells specific for infectious agents, tumors, and autoantigens.     

Antibody- and cell-mediated immune responses of Actinobacillus pleuropneumoniae-infected and bacterin-vaccinated pigs

The number involved in and the rate of migration of donor leucocytes into the following recipient organs (spleen, thymus, bone marrow, lung and mesenteric lymph nodes) were measured in two rat models of orthotopic liver transplantation (OLT) using donor-specific MHC class I antibodies. The first OLT model is one that does not require immunosuppression in order to achieve tolerance and involved the transplantation of DA (MHC haplotype, RT1a) livers into PVG (RT1c) recipients. The second model was one that required a 7-day (10 mg/kg) treatment with cyclosporin A (CsA) to achieve tolerance and used DA donors into Lewis (RT1(1)) recipients. Recipient organs were biopsied on days 3, 20 and 87 following OLT and donor leucocyte migration was quantified by immunohistochemistry and computer densitometry of immunoblots of detergent-solublized tissues in order to resolve both membrane-bound and soluble donor MHC class I antigen. In a separate experiment, spleen biopsies were taken following OLT on days 3 and 15 from the naturally tolerizing OLT model (DA into PVG), treated with and without CsA for 7 days and compared with the (DA into Lewis) model. The initial rate of leucocyte migration between days 3 and 21 following OLT was found to be the most rapid into the spleen, followed by the bone marrow and mesenteric lymph nodes in the naturally tolerant (DA into PVG) model when compared with the (DA into Lewis) model. The number of donor leucocytes in the spleen and mesenteric lymph nodes in both models was, however, approximately the same by 87 days. No real difference in the rate of leucocyte migration was seen in the thymus or the lung for both transplant models over the time course assayed. CsA was found to lower the rate of donor leucocyte migration only over the period it was administered. The rate of donor leucocyte migration into the spleen was still much lower 15 days after OLT in the (DA into Lewis) model compared with the (DA into PVG) model treated with and without CsA. Thus the differences in the rate of donor leucocyte migration into the spleen, bone marrow and mesenteric lymph nodes immediately following OLT may offer an explanation as to why the (DA into PVG) combination is able to accept a transplanted liver without immunosuppressive therapy.     

水淬渣罐铸造中支臂及支轴的热节问题分析

分析了钢渣水淬渣罐铸造过程中存在的支臂部位热节处理和支轴部位相对尺寸铸造定位问题。通过改造支臂结构,分散了集中于支臂部位的热节;利用特种模型材料和对支轴的准确定位,解决了支轴部位的相对尺寸精度问题。     

耐热钢主蒸汽管的焊接

1前言我厂动力区三期锅炉项目为2台75 t/h和1台130 t/h锅炉,与之配套的主蒸汽管道大量使用不同规格的15CrMo耐热管材,其主要规格为D273mm×11mm、D219mm×10mm、D159mm×9mm、D76mm×6mm、D36mm×4mm,管内蒸汽工作温度为450℃,工作压力为3.82 MPa,根据DL5007—92《电力建设施工及验收技术规范(》火力发电厂焊接篇)的要求,50%探伤,焊后24 h进行X射线探伤,评定标准为SD143—85,Ⅱ级合格。为保证质量,对15CrMo钢的焊接工艺特点进行了分析,评定了焊接工艺。2焊接工艺特点2、1 15CrMo属耐热钢,一般在热处理状态下焊接,其热处理状态为900…