热风炉用耐火砖和隔热砖的选择

分别叙述了热风炉用耐火砖和隔热砖的性能，设计热风炉时耐火砖和绝热砖的选择主要由设计热风温度和热风炉尺寸大小来决定，此外还应考虑到耐火砖的价格因素，提出了适用于大型高炉和中小型高炉热风炉的耐火砖选择方案。     

低热值燃气轮机单筒燃烧室修复

通过对烧蚀损坏的低热值燃气轮机单筒燃烧室检查、分析,找出了损坏原因,确定筒体替代材料,开发国产耐火砖替代隔热挂片,对燃烧室进行了修复,积累了检修经验和技术数据。     

铝硅质低蠕变砖的研制与生产

通过研究铝硅质耐火砖性能的变化规律，开发出了满足高炉热风炉高风温和长寿化技术要求的低蠕变砖，确定了低蠕变砖的生产技术方案和生产工艺，并进行了工业生产。产品经国家质检中心检测，达到了国家标准和同行业优质产品水平，并成功用于攀钢4#高炉的热风炉上。     

热处理箱式电阻炉陶瓷纤维炉衬改造

利用陶瓷纤维材料耐高温、热稳定性好、导热率低、比热小及耐机械震动等优点,对高温热处理箱式电阻炉进行炉衬改造,将原有的耐火砖结构改为含锆陶瓷纤维模块结构,以提高炉体的保温隔热效果,从而降低能耗、节约能源,同时有效提高产品质量.     

对提高隧道窑车台面和窑车寿命的研究

一、我省隧道窑车台面和窑车的基本情况我省有不少厂家使用隧道窑生产各种耐火砖,年产量约20多万吨。窑车台面是用粘土砖砌筑的,窑车是一般灰口铁铸造的。车的重量大,在高温下承重能力差,隔热密封性能     

铝硅质耐火材料的XRF分析法

铝硅质耐火材料成分的定量分析通常采用化学分析方法,此方法操作程序繁杂、耗时耗力,如果操作程序控制不当,还会造成分析结果的误差,为此我们开展了XRF分析该材料的方法研究.经过对制样、基本干扰的影响、标样的选择、试样的品种及含量范围等试验,确定了XRF法分析铝硅质耐火材料的可行性,精密度能满足该材料的分析要求,分析的质量和速度都取得了令人满意的效果,可替代现行的化学分析手段.     

平炉耐火砖形状及尺寸设计

高温操作的炼钢平炉是用各种不同高级耐火砖砌成的,所以延长平炉使用寿命的主要方向应该是提高耐火砖的制造质量及平炉砌砖质量.而平炉砌砖的质量主要决定于砌砖方法、砌砖的精细程度和砖形尺寸的准确合理与否.但是如果平炉耐火砖砖形异常繁多复杂小仅不便于耐火材料生产部门的制造,也小便于使用部门的管理,所以合理地改变与简化平炉耐火砖的尺寸及形状是一项非常重要的工作.几年来,我们在苏联先进技术的指导下,在简化砖形方面做了很多工作,取得一些成绩,然而还有很     

侧吹还原炉喷枪耐火砖侵蚀分析与对策

结合生产实际,从渣型、温度、喷枪控制、生产操作等方面对侧吹炉耐火砖侵蚀原因进行分析研究,提出了降低耐火砖侵蚀速度、延长侧吹还原炉炉龄的措施。     

侯马冶炼厂废旧耐火砖获利用

北方铜业侯马冶炼厂澳斯麦特炉和保温炉由于经过多次技术改造,部分耐火砖由于型号和材质的改变已无法再次使用,加之对两炉多次实施延长炉寿的技术攻关,一些已经订货的耐火砖因为炉衬完好没有更换使用,导致存库部分废旧耐火砖。2008年大修以后,侯马冶炼厂在50t阳极炉和100t阳极炉进行检修期间,对存库的废旧耐火材料进行详细分类登记,同时熔炼车间亦对废旧耐火砖的再次利用进行技术攻关。通过大量技术论证,采取改变炉子砌筑方式和对耐火砖进行再加工利用的方法,使部分可用耐火材料应用于阳极炉的小修中,节约耐火材料近50t。不仅保证了炉衬的砌筑质量,同时达到了降低耐火材料消耗的目的。     

唐山马家沟耐火材料厂研制的玻璃窑用特级硅砖等五种新产品通过技术鉴定

唐山马家沟耐火材料厂研制的玻璃窑用特级硅砖、浮法玻璃锡槽底砖、高铝质隔热耐火砖、铅淬火炉用高铝碳化硅砖、镁铬砖等五个新产品,于一九八七年十一月廿五日,分别通过省级技术鉴定。玻璃窑用特级硅砖,具有Sio_2含量高,杂质少,高温性能优良等特点,产品达到了国内同类产品先进水平。浮法玻璃锡槽底砖,主要技术指标达到了国外相同生产工艺的同类产     

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)     

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.     

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.     

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.     

材料科学技术转型发展与钢铁创新基础设施的建设

摘要：在第4次工业革命浪潮的推动下,钢铁科学与技术正在经历数字化、智能化转型。钢铁行业全流程各工序均为“黑箱”,为多场、多相、多变的巨系统,具有复杂相关关系和遗传效应等。这些不确定性带来了巨大的挑战。挑战和机遇并存。这些不确定性提供了智能化和数字化技术的应用场景资源;钢铁行业极为丰富的大数据提供了挖掘其中蕴含客观规律的数据资源;现代的数据科学、智能技术为解决不确定性问题提供了强大的手段。以数据为中心,以工业互联网为载体,以实验工具、数字数据、计算工具为支撑,建设钢铁企业材料创新基础设施,将可以大幅度提高研发效率,降低研发成本,有力地支撑钢铁材料科学与技术的转型发展。实验工具平台除了传统的实验室仪器装备和中试装备之外,实际生产线被作为主要的实验工具。这些实验工具提供丰富、精准、写实的历史数据和现实生产数据,特别是生产线装备提供实际生产大数据,蕴含着生产过程中的全部规律,是极宝贵的数据资源。利用机器学习、深度学习等现代数据挖掘技术为计算工具,对这些数据资源进行处理、分析、计算,将数据转换为高保真度模型,可以得到具有“原位分析能力”的数字孪生。在工业互联网的总体架构下,以数字孪生为核心,组成信息物理系统,构建起基于数据自动流动的状态感知、实时分析、科学决策、精准执行的闭环赋能体系,解决生产制造、应用服务过程中的复杂性和不确定性问题,提高资源配置效率,实现资源优化,对材料行业转型发展提供关键技术支撑。虚实映射、实时交互、精准控制的信息物理系统与材料创新基础设施合二为一,以材料创新基础设施为基盘,形成具有“原位分析能力”的数字孪生,建设钢铁生产全流程、一体化的信息物理系统,必将推进钢铁行业智能制造蓬勃开展和数字化、智能化转型。     

Daydreaming and curiosity in gifted and average children and adolescents.

307 gifted (CA 10–16 yrs; mean IQ 138.8) and 192 age-matched average Ss (IQ 100.8) completed the Imaginal Processes Inventory, the Children's Reactive Curiosity Scale, and the Academic Curiosity Scale. Demographic and IQ data were obtained from Ss' school records. Factor analysis of the data resulted in factors indicative of individual difference dimensions in daydreaming content and curiosity independent of demographic and IQ factors. Analyses of factor scores by grade level revealed decreasing linear trends over grade on the Guilt and Fear of Failure Daydreaming factor in both groups. Increasing trends over grade level were found for the Curiosity and Positive-Constructive Daydreaming factors in the gifted group. Average Ss showed a developmental decline in curiosity. Compared to average Ss, gifted Ss had higher Curiosity factor scores, lower Guilt and Fear of Failure Daydreaming scores, and higher scores on the Intelligence and Family Enrichment factor. The validity of the distinction between intellectual power and intellectual styles and the development of intellectual styles are discussed. (17 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Intralesional and topical chemotherapy and immunotherapy

This article covers the principles and applications of radiation therapy in horses. The goal in treating tumors by irradiation is tumor control with minimum treatment complications. Various treatment techniques are available to achieve this goal. The prognosis depends on many factors such as the extent and location of the tumor, tumor type and tumor cell proliferation. Radiation therapy is a very effective treatment modality for equine tumors but logistical reasons limit its impact in equine oncology.