碳硫分析仪CS-444的气体压力控制技术

介绍了美国LECO公司碳硫仪CS 444气路系统压力控制技术的基本原理、硬件装置和电路控制技术,说明了压力控制技术的运用是碳硫仪气路系统稳定和分析精度的重要保证。本文有助于该仪器的使用和维护者更好地理解并运用这一技术。     

国产CCS—140高频红外碳硫分析仪应用研究

根据使用情况对第一台国产ＣＣＳ－１４０高频红外碳硫分析仪的气路系统、管路长度、高频炉冷却系统等进行了改造,使仪器的分析精度碳ＲＳＤ由小于等于１％提高到小于等于０．５％,硫ＲＳＤ由小于等于３％提高到小于等于２．０％（对中碳、中硫而言）,准确度也有提高,故障率下降。改进后的仪器其技术性能与国际同类仪器相当。     

影响高频红外碳硫仪分析结果稳定性因素的探讨

目前,对金属中碳和硫元素的分析一般都采用高频红外碳硫分析仪。在各厂家分析仪器的使用中,经常有重复性或再现性不尽人意的情况。对此,首要怀疑的是仪器的故障,但往往经过对仪器硬件的检查,结论是仪器工作正常。本文通过对高频红外碳硫仪的原理、操作、分析流程的剖析,总结出影响碳硫仪分析结果准确性和可靠性的几个因素,以供借鉴。1样品的称样量样品称样量不同,其所含的C,S量就存在差别,导致分析结果落在仪器校正曲线上的区域不同。由于仪器线性范围所限,这种校正区域的差异会造成分析结果的波动,尤其在分析仪器的上、下限附近时这种影响…     

微机碳硫自动分析仪应用中出现的问题分析与处理探讨

介绍了微机碳硫自动分析仪使用中常见的故障现象，迅速分析出原因并予以处理。     

用HV-4B型电脑数显碳硫分析仪测定烧结矿和铁矿石中碳和硫

用ＨＶ－４Ｂ型电脑数显碳硫分析仪测定烧结矿和铁矿石中碳和硫刘青桥（湘潭钢铁公司烧结厂,湘潭,４１１１０１）ＨＶ－４Ｂ型电脑数显碳硫分析仪采用ＭＣＳ－５１系列单片机完成化学流程的控制以及模拟滴定分析过程。共用了８只防腐电磁阀作为仪器的气路和液路通断开关...     

日本Horiba-EMIA-8200红外碳硫分析仪的修复

通过对EMIA-8200红外碳硫分析仪的分析、修复,找出其存在故障的几个方面.详细描述红外碳硫分析仪气路、光路以及高频振荡电路部分的故障处理过程.通过修复,对这类设备的原理、构造有了进一步的了解,在积累维修经验的同时增添了许多维修技巧,为今后的维修工作奠定了坚实的基础.     

离心水泵检修后试运行时出现故障的原因分析及处理

各类水泵在运行中常会出现故障，故障的原因及处理，水泵的产品说明书有较详细的介绍。而离心水泵检修后试运行时，则因各种故障的原因不能投入运行或不能正常运行，这些故障产生的原因及处理方法，在水泵的产品说明书上是没有介绍的。因此，找出故障的原因及处理方法也是离心水泵检修工作中的一项重要工作。个人根据多年水泵检修工作的经验，参考有关资料，对离心水泵检修后试运行时出现故障的原因进行了粗浅的分析，并提出处理方法，以为抛砖引玉之用。     

红外碳硫仪中绘图软件及其应用

介绍了LECO CS-444红外碳硫仪微机操作系统中绘图软件,分析了不正常碳(硫)释放曲线产生原因并制定了解决办法,举例说明碳(硫)含量平均值控制图、碳(硫)含量值控制图的使用方法.     

ELTRA METALYT CS100／1000RF碳硫仪气路特点剖析

ＥＬＴＲＡＭＥＴＡＬＹＴＣＳ１００／１０００ＲＦ碳硫仪气路特点剖析张之果，郝嘉训，贝惠玲（冶金部钢铁研究总院，北京，１６６０８１）德国ＥＬＴＲＡ公司生产的ＭＥＴＡＬＹＴＣＳ１００／１０００ＲＦ碳硫测定仪，在设计气路系统时，考虑到实用，稳定，分析结果准...     

TC-136 氧/氮仪分析气路的改进

通过一次气路故障特例，分析了气路的工作原理和工作状态，利用仪器的气路特点和工作进程不同阀态，在无备件情况下，利用自身零部件进行修复，及时排除了故障，有效地延长了仪器的使用寿命。     

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。