韶钢105 m2烧结机过程控制系统的设计与应用

介绍了韶钢105m^2烧结机过程控制系统的构成及主要控制方式。以烧结生产中关键的自动配料、混合料水分、点火炉以及烧结终点控制为例，综合应用烧结理论和控制理论等多学科知识，对烧结过程控制系统及其控制方法进行了探讨，阐述了控制系统在烧结生产过程中的实际应用和效果。     

韶钢105m~2烧结机过程控制系统的设计与应用

介绍了韶钢105 m2烧结机过程控制系统的构成及主要控制方式。以烧结生产中关键的自动配料、混合料水分、点火炉以及烧结终点控制为例,综合应用烧结理论和控制理论等多学科知识,对烧结过程控制系统及其控制方法进行了探讨,阐述了控制系统在烧结生产过程中的实际应用和效果。     

降低烧结矿FeO含量的生产实践

结合八钢烧结分厂实践,论述了影响烧结矿FeO含量的因素,通过控制和稳定配料和烧结过程,降低烧结矿的FeO含量,提高烧结矿质量,降低烧结矿燃耗,为高炉降低焦比、提高产量提供了保证.     

考虑性能指标的烧结机操作优化控制模型

提出了基于烧结矿性能指标的烧结配料及烧结机操作优化控制模型。并编制了相应的应用软件。实现了烧结机操作区问控制。现场应用表明。此模型的建立与实现。既能稳定烧结矿的性能。提高质量稳定率。又能降低烧结成本。     

铁矿粉烧结原料智能制备研究进展

随着智能冶金技术的不断发展,利用人工智能、物联网等技术来实现原料智能化制备已经成为冶金行业的重要趋势。通过原料智能化制备可以实现烧结过程配料、制粒以及布料等方面的精确控制和优化,进而提高烧结矿产量和质量,同时减少生产成本和环境污染。介绍了铁矿粉烧结工艺中原料智能制备技术的应用现状和发展趋势,并通过铁矿粉烧结中的生产效率、成本、能源消耗以及烧结矿产质量指标等多方面综合分析智能制备技术的优缺点。智能配料部分系统介绍了烧结配料发展过程和智能配料模型及其算法,指出了物联网和人工智能等技术的促进作用。智能制粒部分详细介绍了混合料配水控制模型的发展阶段和研究进展,并重点分析了基于3层BP神经网络和Litster优化模型的智能制粒技术研究现状,尤其是结合数据清洗和预处理、引入正则化和dropout技术以及采用批量训练和并行计算等方法来实现智能制粒预测。智能布料部分讨论了利用多种技术来实现厚料层和料层偏析优化控制,以达到高效、高产烧结的目的,同时指出三元尺寸图、磁偏析以及EDEM软件仿真模拟等技术存在的问题,并给出相应的技术优化建议。系统总结了烧结原料制备过程中的配料、制粒和布料工序智能化现状和未来发...     

烧结过程智能控制研究进展

烧结是钢铁生产流程的一道主要工序,智能化烧结是钢铁智能制造的重要组成部分。本文综述了近年来烧结过程智能控制方面的研究进展,重点介绍了烧结矿化学成分智能控制、过程状态智能控制、固体燃料消耗优化控制和关键工艺参数优化方面所取得的进步,同时从数学建模、过程控制、工艺参数优化方面探讨了烧结过程智能控制的研究方向。     

550m~2烧结机智能闭环控制系统的设计与应用

烧结智能闭环控制系统包括质量智能闭环控制子系统、烧结过程智能控制子系统和生产信息管理子系统三部分,具有18个不同的控制子功能,采用线性规划、最小二乘法等数学方法及人工智能方法对从配料到成品的整个烧结工艺进行控制,实现了烧结矿成分的智能闭环控制、一键式的烧结生产以及烧结生产过程中指标参数的自动统计和分析。该系统应用以来,经济效益和环境效益十分显著,实现了烧结生产的整体智能闭环控制,经中国金属学会组织的科技成果鉴定,达到了国际领先水平。     

烧结智能控制系统研究与应用

本文研究了烧结生产过程控制系统从配料开始到烧结的全过程,针对各个环节建立模型,实现烧结生产的智能控制。优化了烧结生产过程、提高了劳动生产率、降低了能耗,实现了烧结生产的智能闭环控制。     

烧结系统智能制造的发展现状与展望

为提升烧结工艺的智能制造水平,本文以大数据为核心线索,全面探讨了参数预测、图像识别、过程控制和系统平台等在烧结工艺中的应用。工艺参数预测有效提高了生产效率,保障了烧结矿质量;图像识别技术赋予机器“感知”能力,使其能够科学有效地对信息进行规划分类;烧结智能控制系统的水分、配料和终点控制应用显著提高了生产效率和产品质量,为烧结工艺智能化发展和钢铁工业可持续进步奠定了坚实基础;烧结大数据平台的实时数据分析确保数据的实时性与有效性,为企业烧结生产提供科学依据,提高了精准度和运行速度。在大数据的引导下,烧结工艺的智能制造水平得到显著提升,企业生产效率和烧结矿质量均得到有效保证。智能控制技术的快速发展使得钢铁工业迈向智能制造的转型升级成为必然趋势。     

烧结烟气源头与过程NOx减排的应用研究

为解决烧结烟气NOx末端治理投资大、运行成本高,且易产生二次污染物的问题,深入研究了烧结烟气NOx的产生机理。结合烧结配料方式,从降低原燃料氮含量、提高烧结矿碱度、燃料预处理等方面提出从源头降低NOx的生成;结合烧结过程,提出改变烟气路径的烧结烟气选择性循环技术,以及提高料层厚度,优化烧结终点位置和温度等控制手段,从烧结过程优化控制条件,降低NOx的生成。重点分析了这些技术方案在钢铁企业应用的实际案例以及达到的效果。     

Voices of fear and anxiety and sadness and depression: The effects of speech rate and loudness on fear and anxiety and sadness and depression.

Two studies investigated the role of expressive vocal behavior (specifically, speech rate and loudness) in fear and anxiety and in sadness and depression. In the 1st study, participants spoke about personally experienced fear and anxiety-arousing and neutral events using 3 different voice styles: fast and loud, normal, and slow and soft. In the 2nd study, participants spoke about personally experienced sad or depressing and neutral events using the same 3 voice styles. In both studies, the participants' highest levels of subjective affective and cardiovascular (CV) arousal occurred when they spoke about the emotional events in a mood-congruent voice style: fast and loud in the case of fear and anxiety, and slow and soft in the case of sadness or depression. Mood-incongruent voice styles canceled the heightened levels of CV arousal normally associated with these negative emotions. The voice-style manipulation had no significant effect on the participants' levels of CV arousal during the neutral discussions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Synthesis and analysis of mixed chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans and assessment of formation and occurrence of the fluorinated and chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans

Despite the use of multimodal therapy, higher-grade glioma is still uniformly fatal in the adult population. There is a considerable difference between the length of survival in each given patient, even within the same tumor type and malignancy grade group, suggesting that there are factors that might differentially influence outcome. To identify such factors, 107 patients with anaplastic or malignant glioma were retrospectively investigated. Clinical parameters and paraclinical data on the p53, mdm2, and EGFR genes at the DNA or protein level were evaluated by univariate analysis and Cox proportional hazards regression modeling. Kaplan-Meier survival estimation demonstrated that immunohistochemical positivity for mdm2 protein in patients with anaplastic astrocytoma or with glioblastoma multiforme was associated with a shorter survival time (p = 0.02). P53 gene mutations and immunopositivity for the epidermal growth factor receptor (EGFR) protein were not significantly related to poor prognosis. The Cox proportional hazards model revealed immunohistochemical positivity for p53, mdm2, or for both of them, the presence of postoperative irradiation, and the extent of surgical resection of tumor to be variables significantly associated with prolonged survival. EGFR overexpression, age over 60 years, and Karnofsky performance score below 40 points did not significantly shorten survival time. In conclusion, the present study identified immunohistochemically detected mdm2-protein overexpression as a statistically significant negative prognostic parameter in patients bearing anaplastic or malignant glioma. Association analysis of variables revealed a possible correlation between mdm2 and p53, which is also consistent with the biological interaction mode of both proteins in vivo.     

Sexuality and aging--usual and successful

BACKGROUND: As aging research increasingly reflects an effort to dissociate true time-driven changes from those that can be improved, sexuality in later life remains largely unexplored. Several problems are evident. There is a lack of normative data, a lack of a conceptual framework relating to the biology, psychology, and sociology of sex, and an attitudinal resistance that obscures the entire topic. METHODS: We conducted a three-part instructional series on major topics involved with sexuality and aging. We surveyed our group of attendees (n 158, average age 68 for males, 65 for females) before and after the series. RESULTS: A remarkably robust sex life was evidenced by both the men and the women, even until advanced old age. Yet, a substantially decreased involvement was reported from 10 years earlier. Despite current activities, people of both sexes wished they were participating even more than they currently were. Impotency was identified as the major negative feature for the men; relationship problems were for the women. A questionnaire 6 months after the series reported improved sexual attitudes, but no change in sexual activities from the earlier survey. CONCLUSION: Sexuality is a major quality-of-life issue which persists into old age. Our study showed that the usual sexual practices reported by our group were not considered by them to be ideal. The intervention of this instructional series provided improved sexual attitudes but not performance. Additional studies are encouraged.     

Spondylolysis and spondylolisthesis and sports

Spondylolysis and spondylolisthesis occur predominantly in the lower lumbar spine. Besides congenital defects such as predisposition of spondylolysis the correlation between competitive sports activities and an increased incidence of spondylolysis is proved. In early stages, complete healing can be achieved by conservative treatment (abstinence from sports activities for 3 months, orthesis). Persistence of pain, neurologic symptoms and progression of vertebral slipping are indications for operative treatment (reconstruction of the isthmus, dorso-ventral spondylodesis). The exercise tolerance depends on the extent of instability, progression of vertebral slipping and clinical symptoms. The limits of exercise tolerance vary among the individual athletes and require the decision of the physician. Backstroke swimming, abdominal and back muscle strengthening exercises, and types of sport involving smooth movements are advisable. Sports education in school is possible without restriction in patients with stable spondylolysis and in those with spondylolisthesis without unfavourable concomitant factors.     

Larks and owls and health, wealth, and wisdom

OBJECTIVE: To test the validity of Benjamin Franklin's maxim "early to bed and early to rise makes a man healthy, wealthy, and wise." DESIGN: Cross sectional analysis of sleeping patterns in a nationally representative group of elderly people, and longitudinal investigation of mortality. SETTING: Eight areas in Britain (five in England, two in Scotland, and one in Wales). SUBJECTS: 1229 men and women aged 65 and over who in 1973-4 had taken part in a survey funded by the Department of Health and Social Security and for whom data on sleeping patterns, health, socioeconomic circumstances, and cognitive function had been recorded. MAIN OUTCOME MEASURES: Self reported income, access to a car, standard of accommodation, performance on a test of cognitive function, state of health and mortality during 23 years of follow up. RESULTS: 356 people (29%) were defined as larks (to bed before 11 pm and up before 8 am) and 318 (26%) were defined as owls (to bed at or after 11 pm and up at or after 8 am). There was no indication that larks were richer than those with other sleeping patterns. On the contrary, owls had the largest mean income and were more likely to have access to a car. There was also no evidence that larks were superior to those with other sleeping patterns with regard to their cognitive performance or their state of health. Both larks and owls had a slightly reduced risk of death compared with the rest of the study sample, but this was accounted for by the fact that they spent less time in bed at night. In the study sample as a whole, longer periods of time in bed were associated with increased mortality. After adjustment for age, sex, the presence of illness, and other risk factors, people who spent 12 or more hours in bed had a relative risk of death of 1.7 (1.2 to 2.5) compared with those who were in bed for 9 hours. The lowest risk occurred in people who spent 8 hours in bed (adjusted relative risk 0.8; 0.7 to 1.0). CONCLUSION: These findings do not support Franklin's claim. A "late to bed and late to rise" lifestyle does not seem to lead to socioeconomic, cognitive, or health disadvantage, but a longer time spent in bed may be associated with increased mortality.     

Craniometaphyseal and craniodiaphyseal dysplasia, head and neck manifestations and management

Mechanical allodynia (MA) following hand injury is a well-documented clinical problem. The purpose of this pilot study was to examine the relationship between hand MA and the upper limb tension test (ULTT). The ULTT mechanically stresses the neural structures from the C5/6/7 neural foramina to the median nerve distally. This study examined 29 subjects with unilateral hand MA before and after a 2-week neural self-mobilization programme. There was a significant difference between the subjects' affected and unaffected sides when tested using the ULTT, both in reproduction of symptoms and in reduced range of motion of the ULTT. Following the self-mobilization program, there was an improvement in the range of the ULTT, and subjects reported a reduction in their symptoms. Complete recovery was not obtained in all cases. The results of this study suggest that the ULTT is a useful tool both in assessment and treatment of subjects with hand MA.     

深云立交桥梁检测及加固改造

根据深云立交桥梁的检测结果，对该桥目前的整体状况、工作状态，及其使用情况做出综合评价，对桥的病害原因进行了分析，并提出合理的加固方案。     

关于摩尔浓度及其与硬度转换关系问题的讨论

众所周知，国际单位制物质的量采用摩尔(mol)表示，近几年出版的给排水专业书籍，为了与国际单位制接轨，逐渐将摩尔的使用频率不断提高，被给排水技术人员广泛应用的新版给排水设计手册，将表示物质浓度的单位“当量／升”或“毫克当量／升”．改为mol／l或mmol／l，虽然编者对其基本单元定义作了说明，但在实际运用上仍会出现误解，     

《儿子与情人》的语码转换与男女二元对立

劳伦斯小说《儿子与情人》一个鲜明的语言特色就是标准英语和当地方言频繁的语码转换。莫瑞尔用方言来对抗妻子,而妻子坚持用标准英语,偶尔也用方言来讽刺、挖苦丈夫。语码转换反映了劳伦斯男女二元对立的哲学思想。