应用6-σ方法分析薄型覆铜板Hi-Pot试验失败原因与改进方案

应用6-σ方法、工具研究分析了薄型覆铜板Hi-Pot试验失败的原因并提出了针对性的改进方案。

一个考虑扩散的Holling-Tanner捕食-食饵模型研究

研究了一个在齐次Neumann边界条件下考虑扩散的Holling-Tanner捕食-食饵模型.首先,得到了系统的全局吸引子和持久性;然后,讨论了系统正常数平衡解的全局渐进稳定性;最后,研究了系统的Turning失稳性质.

职业院校“体育-专业相结合”教改实验研究--以“篮球教学与烹饪翻锅相结合”为例

现代职业院校体育教学应围绕专业性特点,挖掘职业院校体育内涵、体现职业院校体育特色。为了提高职业院校烹饪专业学生的专业能力,运用教学实验法和数理统计法等研究方法,揭示职业院校篮球教改对烹饪专业学生翻锅能力的影响。实验结果表明:烹饪专业学生的双手握力与翻锅成绩之间均存在着线性正相关关系;8周篮球教改实验会对烹饪专业学生的双手握力,以及翻锅能力的提升起到显著的促进效果。在对实验结果进行分析与讨论的基础上,提出有效促进职业院校体育教学与专业更深入结合的对策与建议。

Modeling and multi-response optimization of machining performance while turning hardened steel with self-propelled rotary tool

There are many advanced tooling approaches in metal cutting to enhance the cutting tool performance for machining hard-to-cut materials. The self propelled rotary tool （SPRT） is one of the novel approaches to improve the cutting tool performance by providing cutting edge in the form of a disk, which rotates about its principal axis and provides a rest period for the cutting edge to cool and allow engaging a fresh cutting edge with the work piece. This paper aimed to present the cutting performance of SPRT while turning hardened EN24 steel and optimize the machining conditions. Surface roughness （Ra） and metal removal rate （rMMR） are considered as machining perfor- mance parameters to evaluate, while the horizontal incli- nation angle of the SPRT, depth of cut, feed rate and spindle speed are considered as process variables. Initially, design of experiments （DOEs） is employed to minimize the number of experiments. For each set of chosen process variables, the machining experiments are conducted on computer numerical control （CNC） lathe to measure the machining responses. Then, the response surface method- ology （RSM） is used to establish quantitative relationships for the output responses in terms of the input variables. Analysis of variance （ANOVA） is used to check the adequacy of the model. The influence of input variables on the output responses is also determined. Consequently, these models are formulated as a multi-response optimi- zation problem to minimize the Ra and maximize the rMMR simultaneously. Non-dominated sorting genetic algorithm-II （NSGA-II） is used to derive the set of Pareto-optimal solutions. The optimal results obtained through the pro- posed methodology are also compared with the results of validation experimental runs and good correlation is found between them.

聚苯胺衍生物膜修饰电极的电化学和催化性质

采用聚-2,5-二甲氧基苯胺(PDMAn)、聚邻甲苯胺(POT)膜修饰电极,以异丙醇(i-P)氧化为模型反应,研究功能性膜电极的电催化性能.两种聚合物的伏安行为都表现为两对氧化还原峰;与镀铂的Pt电极比较,Pt金属化的PDMAn和POT修饰电极,大大提高了i-P氧化电流密度,而且随着循环次数增加,氧化电流不断增大,表明功能性膜修饰电极具有较高的催化活性.POT修饰电极在较低的铂含量下就表现出对i-P的强烈催化活性,而且对低浓度i-P的氧化,具有较高的响应灵敏度;此外POT还具有良好的环境稳定性,可望成为一种具有实际应用前景的电化学传感器.

活动式密闭罩在钢包翻罐装置尘源治理中的应用

针对某钢厂钢包翻罐装置的工艺特点 ,结合该装置除尘系统改造工程 ,设计了一种大型活动式密闭罩 ,解决了钢包翻罐装置的尘源捕集问题 。

铰接式抱罐车转向系统设计

铰接式抱罐车是钢渣处理生产线上的主要设备。从力学角度分析抱罐车的最大转向阻力矩及转向半径,确定铰接式抱罐车全液压转向系统的关键参数,计算结果为铰接式抱罐车全液压转向系统的设计理论及方法奠定基础。

基于solidworks的混凝土输送罐翻转卸料功率计算

为了求得混凝土输送罐罐体翻转卸料功率,对罐体翻转阻力矩进行了分析研究,并结合solidworks软件,提出了一种计算罐体翻转阻力矩和翻转功率方法,解决了罐体翻转卸料所需合适功率的选取问题。

浸渍罐开门装置的研究

带开门装置的浸渍罐是为吉林炭素股份有限公司设计的用于浸渍电极设备。浸渍罐开门装置采用液压传动 ,远程电气自动控制。实现了罐门水平开启 ,开启角度为 0 -180°。

A Novel Tetraphenylethylene-Based“Turn On”Fluorescent Sensor with Highly Sensitive Response to Mercury Ions

A novel 4-tert-butyl-N’-(4-(1,2,2-triphenylvinyl)benzylidene)benzohydrazide(TBB)was successfully synthesized in simple one-step process.It was characterized by FT-IR,1H NMR,13C NMR and HRMS.Its fluorescence sensing ability to 15 metal ions was investigated.Weak emission from TBB could be efficiently increased by trace Hg^2+,through coordination reaction between TBB and Hg^2+ with"turn on"character.The fluorescence intensity of TBB/Hg^2+([TBB]=3.0×10^–6 mol/L,[Hg2+]=1.3×10^–4 mol/L)was 7.5 times higher than that of TBB.This TBB sensor exhibited high selectivity for Hg^2+ and other metal ions did not interfere in this determination.The limit of detection was 0.566μmol/L(S/N=3).The experimental results showed that this TBB sensor could sensitively respond to Hg^2+ within concentration range(from 5×10–6 mol/L to 1.3×10^–4 mol/L).

新型渣罐保护剂试验研究

本文主要介绍了一种以转炉钢渣为主要原料的新型渣罐保护剂的研究、试验、应用过程。从原材料选择、配比研究、性能检测方面进行了大量的基础试验和应用试验,最终确定性价比好且符合渣罐需求的较佳保护剂配合比,在应用过程中确定了喷涂厚度、相关作用条件和喷涂流程。经现场实际应用,翻罐率达到97%,无一起严重粘罐事故,应用情况良好。

Epigenetic Enabled Normal Human Cells, Lead to <i>First Cell</i>’s Unique Division System, Driving Tumorigenesis Evolution

Normal cells must become cancer-enabling before anything else occurs, according to latest literature. The goal in this mini-review is to demonstrate special tetraploidy in the enabling process. This we have shown from genomic damage, DDR (DNA Damage Response) activity with skip of mitosis leading to diploid G2 cells at the G1 border in need of chromatin repair for continued cell cycling to the special tetraploid division system. In several studies specific methylation transferase genes were activated in normal human cells in tissue fields, containing different cell growth stages of the cancerous process. Histology studies, in addition to molecular chemistry for identification of oncogenic mutational change, were a welcome change (see below). In a study on melanoma origin, DDR also showed arrested diploid cells regaining cycling from methylation transferase activity with causation of 2n melanocytes transforming to 4n melanoblasts, giving rise to epigenetic tumorigenesis enabled First Cells. Such First Cells were from Barrett’s esophagus shown to have inherited the unique division system from 4n diplochromosomal cells, first described in mouse ascites cancer cells (below). We discovered that the large nucleus prior to chromosomal division turned 90° relative to the cytoskeleton axis, and divided genome reductive to diploid, First Cells, in a perpendicular orientation to the surrounding normal cells they had originated from. This unique division system was herein shown to occur at metastasis stage, implying activity throughout the cancerous evolution. Another study showed 4-chromatid tetraploidy in development to B-cell lymphoma, and that such cancer cells also proliferated with participation of this unusual division system. Such participation has long been known from Bloom’s inherited syndrome with repair chiasmas between the four chromatids, also an in vitro observation by us. Our cytogenetic approach also revealed that they believed mitotic division in cancer cells is wrong because such cell divisions were found to be from an adaptation between amitosis and mitosis, called amitotic-mitosis. Amitosis means division without centrosomes, which has long been known from oral cancer cells, in that MOTCs (microtubule organizing center) were lacking centrioles. This observation calls for re-introduction of karyotype and cell division studies in cancer cell proliferation. It has high probability of contributing novel approaches to cancer control from screening of drugs against the amitotic-mitotic division apparatus.

晶转埚转以及拉速对单晶硅生产过程的影响分析

单晶硅属于当前技术应用当中十分重要的一种半导体材料,其应用在电子信息技术领域以及太阳能技术领域当中的程度不断提升。当前单晶硅材料应用程度提升,也进一步增强了单晶硅在质量上的要求。换言之,单晶硅的杂质要求更高,加强杂质去除或者控制单晶硅当中的杂质氧含量就显得十分重要。本文侧重研究晶埚转以及拉速对单晶硅生产过程的影响分析。