带钢热连轧机卷取机的卷筒传动

本文列出了国内一些热连轧机地下卷取机卷筒传动的一些参数，并作了一些比较，对卷取力矩的计算、张力控制系统及功能的分担作了说明。     

露天采场边坡平台参数计算程序设计及应用

针对国内外矿山设计软件数据计算功能尚不完善的现状,结合矿山设计过程中边坡结构参数设计面临的低效、复杂等实际问题,通过对露天边坡结构参数几何关系及边坡参数间逻辑关系的分析,构建了边坡的空间几何模型,推导了台阶宽度及辅助平台宽度的计算模型,并通过规程规范对各参数的限值要求,利用C#语言及.NET平台开发了一套边坡平台参数计算程序。该程序可实现边坡参数自动合规及自动测算功能,为矿山设计提供了一种简单、高效的操作工具。     

作为材料设计基础的相图研究

介绍了现代材料设计与相图研究之间的关系，强调了计算相图的出现使相图研究成为材料的设计的一部分，相图计算程序系统的另一重要功能是评估和优化热力学参数，以双相纳米材料、宽滞后形状记忆合金、钕铁硼永磁合金、钛铝金属间化合物和低温用钢的研究开发为例，说明了相图研究在材料设计上的重要作用。     

高炉操作参数的优化

建立了高炉操作参数优化选择数学模型，计算了一些参数的变化对生产的影响，通过参数组合计算的目标分析，可使参数优化组合，以获得较好的经济效益。     

斜轧穿孔机孔型优化系统的研制

开发了主要功能为穿孔工具优化设计、穿孔调整参数优化计算以及毛管横向壁厚均匀性分析的斜轧穿孔机孔型优化系统。该系统不仅可用于斜轧穿孔工具设计和离线分析，还可用于指导穿孔机操作。     

攀钢1220mm冷连轧机数学模型的长期自适应分析

攀钢１２２０ｍｍ冷连轧机主轧机组控制系统为两级计算机系统：一级控制计算机完成基础自动化控制，实现轧线设备的控制与实测数据的采集等功能；二级控制计算机完成过程控制，进行模型计算、轧制数据管理等功能。冷连轧机的轧制规程设定计算模型一般分为两种：一种是以轧制理论为主的理论模型；另一种是以实际轧制数据为主的经验模型。在实际使用时，这两种模型相互联系，只是侧重面不同。攀钢１２２０ｍｍ冷连轧机的设定模型是以经验为主的模型。它将标准轧制参数以表格形式存储，在设定计算时，根据来料情况进行修正计算，以得出相应的轧…     

带式焙烧机操作参数对球团强度影响研究及源头减排NOx措施

基于SPSS统计分析软件，对带式焙烧机球团矿抗压强度与各工艺参数进行相关性分析，并使用线性回归功能建立回归模型，根据模型计算结果，通过降低焙烧温度，源头治理带式焙烧机脱硫脱硝入口烟气NO_X浓度，同时确保球团矿抗压强度不下降。     

科技信息

科技信息ＣＡＤ应用于轧钢力能参数计算轧钢力能参数计算是轧钢工程设计、技术改造、新产品开发中必不可少的工程计算。尤其是多品种轧机和连轧机，要完成全部计算需要上百道次的计算，而每一道次的计算均需数百个数据的处理，才能得出结果。安阳钢铁公司年产钢１５０多万...     

马钢单机架可逆式轧制模型分析

马钢单机架可逆式轧机过程控制系统使用了日立公司的表格式轧制模型。介绍了该模型参数计算公式,模型参数计算流程及自适应学习功能。     

基于ANSYS二次开发方矩形管辊弯仿真

利用ANSYS平台的开发环境，在ANSYS自有的APDL参数化功能和冷弯成型特点的基础上，结合冷弯板料成型规律，建立弹塑性大变形有限元模型并采用动力显式算法对方矩形管冷弯成型过程进行仿真计算分析，实现了在ANSYS界面下输入预设辊花参数，得到冷弯变形后板料的等效塑性应力应变，实践证明利用此方法得到的参数和数据符合实际生产状况，因此达到了为工厂实际生产提供参考和依据的目的．     

直接控制系统参数的模型法研究

直接控制系统的参数离线整定的主要困难在于无法确定受控系统的响应。本文以能量平均方程和热传导方程为基础,建立了较为严密的炉子简化模型,作为调试环境,首次尝试实现了PID参数的离线预调试,它对于实际在线研究有参考价值,并可成为直接控制系统CAI的蓝本。同时以全交换面积为基础提出了热电偶计算公式,该公式解除了炉转为辐射零热流面的假设条件,具有更一般的意义。     

On the importance of van der Waals interaction in the groove binding of DNA with ligands: restrained molecular dynamics study

Comparison of interaction energy between an oligonucleotide and a DNA-binding ligand in the minor and major groove modes was made by use of restrained molecular dynamics. Distortion in DNA was found for the major groove mode whereas less significant changes for both ligand and DNA were detected for the minor groove binding after molecular dynamics simulation. The conformation of the ligand obtained from the major groove modes resembles that computed with the ligand soaked in water. The van der Waals contact energy was found to be as significant as electrostatic energy and more important for difference in binding energy between these two binding modes. The importance of van der Waals force in groove binding was supported by computations on the complex formed by the repressor peptide fragment from the bacteriophage 434 and its operator oligonucleotide.     

白银有色金属公司能源信息管理系统的开发研究

在分析研究白银有色金属公司产品结构、耗能工序、能源品种及其能耗结构特点的基础上，应用FoxPro for Windows开发研制了能源信息管理系统。该软件系统在Windows平台上操作，具有输入输出、浏览、查询、汇总统计、报表打印等功能模块以及友善的操作界面，操作方便，可极大地提高公司能源管理的效率。     

Effect of Tool Geometry on Material Flow Behavior of Refill Friction Stir Spot Welding

Using LY12 aluminum alloy as the research object, material flow behavior of refill friction stir spot welding process is simulated. The simulation results are investigated by studying the macrostructure and microstructure of the refill friction stir spot welding joints. Effects of tool geometries on material flow are mainly discussed. Results show that bonding ligament and grains in different regions of the stir zone are affected by the material flow behavior. Rational groove on the sleeve can increase the material flow velocity. From the viewpoint of reducing the unfavorable bonding ligament, the groove on the sleeve inner wall is better than the smaller width groove on the sleeve outer wall. Compared with the concentric circle grooves on the sleeve bottom, the scrolled groove is more beneficial to decrease the bonding ligament thickness and increase the welding spot area. Disregarding the higher heat input, sleeve with bigger outer diameter greatly increases the flow velocity and the welding spot area compared to changing the groove geometry.     

可溶阳极电解生产1~#电钴的工艺研究

介绍采用Ｐ２０４ 萃取除Ｆｅ、Ｚｎ 和Ｍｎ,ＨＡ－ＰＥ２０６协萃体系除Ｃｕ,ＨＡ－ＰＥ２０６协萃体系除Ｎｉ、Ｃｕ,并用净化后液进行可溶阳极电解得到１＃ 电解钴的工艺研究过程。     

轴定位模块技术在高速棒材旋转导槽中的应用

文章介绍了泰国泰龙高速棒材轧机旋转导槽式棒材收集系统的自动化控制。阐述了利用轴定位模块对旋转导槽的控制思想。以SIEMENS公司S7-300系列PLC的FM354轴定位模块为例,从硬件上剖析轴定位模块。讲述了轴定位模块的软件参数化及运动程序的编制过程。说明了轴定位模块可应用的领域。     

Solution conformation of the (-)-trans-anti-[BP]dG adduct opposite a deletion site in a DNA duplex: intercalation of the covalently attached benzo[a]pyrene into the helix with base displacement of the modified deoxyguanosine into the minor groove

A combined NMR-computational approach was employed to determine the solution structure of the (-)-trans-anti-[BP]dG adduct positioned opposite a -1 deletion site in the d(C1-C2-A3-T4-C5- [BP]G6-C7-T8-A9-C10-C11).d(G12-G13-T14-A15-G1 6-G17-A18-T19-G20-G21) sequence context. The (-)-trans-anti-[BP]dG moiety is derived from the binding of the (-)-anti-benzo[a]pyrene diol epoxide [(-)-anti-BPDE] to N2 of dG6 and has a 10R absolute configuration at the [BP]dG linkage site. The exchangeable and non-exchangeable protons of the benzo[a]pyrenyl moiety and the nucleic acid were assigned following analysis of two-dimensional NMR data sets in H2O and D2O solution. The solution conformation has been determined by incorporating intramolecular and intermolecular proton-proton distances defined by lower and upper bounds deduced from NOESY spectra as restraints in molecular mechanics computations in torsion angle space followed by restrained molecular dynamics calculations based on a NOE distance and intensity refinement protocol. Our structural studies establish that the aromatic BP ring system intercalates into the helix opposite the deletion site, while the modified deoxyguanosine residue is displaced into the minor groove with its face parallel to the helix axis. The intercalation site is wedge-shaped and the BP aromatic ring system stacks over intact flanking Watson-Crick dG.dC base pairs. The modified deoxyguanosine stacks over the minor groove face of the sugar ring of the 5'-flanking dC5 residue. The BP moiety is positioned with the benzylic ring oriented toward the minor groove and the distal pyrenyl aromatic ring directed toward the major groove. This conformation strikingly contrasts with the corresponding structure in the full duplex with the same 10R (-)-trans-anti-[BP]dG lesion positioned opposite a complementary dC residue [de los Santos et al. (1992) Biochemistry 31, 5245-5252); in this case the aromatic BP ring system is located in the minor groove, and there is no disruption of the [BP]dG.dC Watson-Crick base pairing alignment. The intercalation-base displacement features of the 10R (-)-trans-anti-[BP]dG adduct opposite a deletion site have features in common to those of the 10S (+)-trans-anti-[BP]dG adduct opposite a deletion site previously reported by Cosman et al. [(1994)(Biochemistry 33, 11507-11517], except that there is a nearly 180 degrees rotation of the BP residue about the axis of the helix at the base-displaced intercalation site and the modified deoxyguanosine is positioned in the opposite groove. In the 10S adduct, the benzylic ring is in the major groove and the aromatic ring systems point toward the minor groove. This work extends the theme of opposite orientations of adducts derived from chiral pairs of (+)- and (-)-anti-BPDE enantiomers; both 10S and 10R adducts can be positioned with opposite orientations either in the minor groove or at base displaced intercalation sites, depending on the presence or absence of the partner dC base in the complementary strand.     

安钢∠80mm角钢生产工艺改进

介绍了Φ400mm机组∠80mm角钢腿短原因以及粗轧孔型设计方面存在的问题,通过对粗轧孔型系统的生产工艺改进,解决了∠80mm角钢生产过程中腿短问题,改进效果明显。     

Characterization of a protein recognizing minor groove binders-damaged DNA

By using electromobility shift assay (EMSA), we have identified a protein able to recognize the DNA only if it was previously reacted with minor groove binders. This protein binds with very high affinity AT containing DNA treated with minor groove binders such as distamycin A, Hoechst 33258 and 33342, CC-1065 and ethidium bromide minor groove intercalator, but not with major groove binders such as quinacrine mustard, cisplatin or melphalan, or with topoisomerase I inhibitor camptothecin or topoisomerase II inhibitor doxorubicin. This protein was found to be present in different extracts of human, murine and hamster cells, with the human protein which appears to have a molecular weight slightly lower than that of the other species. This protein was found to be expressed both in cancer and normal tissues. By using molecular ultrafiltration techniques as well as southwestern analysis it was estimated that the apparent molecular weight is close to 100 kDa. We can exclude an identity between this protein and other proteins, with a similar molecular weight previously reported to be involved in DNA damage recognition/repair, such as topoisomerase I, mismatch repair activities such as the prokaryotic MutS protein and its human homologue hMSH2 or proteins of the nucleotide excision repair system such as ERCC1, -2, -3 and -4.     

高强铝合金的激光-MIG复合焊接的实验研究

以20mm厚的高强铝合金2519-T87为研究对象，研究了激光-MIG复合焊接工艺的工艺参数、坡口形貌以及热处理制度对高强铝合金的平板对接接头的抗拉强度的影响。研究表明：采用类似双U型坡口比国外常用的双V型坡口更有利于复合焊的焊接；保护气体对焊接接头的气孔的形成比较敏感，从而影响焊接接头的抗拉强度，复合焊的保护气体一般采用He气中添加少量的Ar；送丝速度通过改变焊接热输入来影响焊缝组织的晶粒大小以及强化元素的烧损量对焊接接头的强度影响较大。焊后对接头进行合适的热处理，可以显著提升接头的抗拉强度。