安钢智能调度管理系统设计

介绍了国内外企业调度管理系统的研究现状,阐述了企业信息化建设在生产调度系统中的必要性和重要性.以安钢生产调度管理系统为研究对象,对安钢生产在线智能调度管理系统进行了探讨和研究.     

安钢生产计划网络管理系统的开发与应用

介绍了安钢生产计划网络管理系统的开发背景、需求分析、总体设计、详细设计、系统配置、网络配置及其在安钢生产计划中的应用及效果。     

安钢永通公司物资计量系统改造

对安钢永通公司的物资计量系统存在的问题进行了分析,提出了相应的改进措施,通过完善企业信息化建设、实行计量秤房计算机联网改造,解决了计量系统中存在的诸多问题,取得了明显效果.     

计控网络数据管理系统的开发和应用

介绍了安钢计控网络数据管理系统的开发背景、原则、数据流程、网络、数据库、模块的设计及其应用情况。     

厂间循环物资在烧结系统的综合使用优化

安钢烧结系统使用的厂间物资有高炉重力除尘灰、运焦线除尘灰、焦化除尘灰、炼钢除尘灰以及新增的脱硫脱硝系统产生的活性炭粉。各类含碳厂间物资的使用存在使用方式粗放、搭配不科学的问题。通过加强各类厂间物资的成分化验,根据产生量、有害元素含量和性状,按照各烧结系统不同的工艺条件和高炉的要求进行分配和搭配,采用更加科学有效的配加方式,既满足了烧结生产稳定性的要求,又满足了不同高炉对不同烧结系统烧结矿质量和有害元素的控制要求,达到资源合理利用的目的。     

安钢炼钢系统低成本运行模式浅析

介绍了安钢炼钢系统低成本运行生产实践,以成本倒逼保零为目标,通过物资采购、库存管理、资源配置的统筹计划,以市场价格为指导进行物料结构动态测算与调整,工艺技术创新与改进,查堵漏洞,推进标准化操作等措施,使炼钢成本得以持续降低,达到资源效益最大化,增强了产品市场竞争力。     

PDF~（TM）矿粉烧结试验研究

以安钢的原料结构为基础,通过对PDFTM矿粉进行物相分析及烧结性能的研究,并与安钢使用的扬迪、印度矿进行了比较,验证了该矿做为安钢长协矿种的可行性。     

安钢物资采购"六差降本法"的实践与探讨

成本是企业发展的命脉,生产原料是成本的重要构成部分,物资采购在企业发展中占有重要地位,如何降低采购成本是众多企业探讨的热门话题.本文结合安钢多年的采购实践经验,以2005年的采购实践为例,对总结出的"六差降本法"进行了分析探讨.     

提高小方坯定重切割精度的生产实践

介绍了安钢第二炼钢厂对小方坯连铸机定重切割系统的研究与改进,通过优化定重切割设备,软件升级,闭环控制,开发定重切割数据管理系统,提高了小方坯定重切割精度,推动了炼钢轧钢系统整体效益的提高。     

对安钢发展球团生产的可行性浅析

结合安钢实际和国内外球团发展状况,对安钢发展球团生产的可行性和必要性进行了分析。通过对三种球团工艺进行对比,提出适合安钢发展的球团工艺为链算机一回转窑。     

A comparison of in vivo and in vitro methods for determining availability of iron from meals

A comparison is made between in vitro and human and rat in vivo methods for estimating food iron availability. Complex meals formulated to replicate meals used by Cook and Monsen (Am J Clin Nutr 1976;29:859) in human iron availability trials were used in the comparison. The meals were prepared by substituting pork, fish, cheese, egg, liver, or chicken for beef in two basic test meals and were evaluated for iron availability using in vitro and rat in vivo methods. When the criterion for comparison was the ability to show statistically significant differences between iron availability in the various meals, there was substantial agreement between the in vitro and human in vivo methods. There was less agreement between the human in vivo and the rat in vivo and between the in vivo and the rat in vivo and between the in vitro and the rat in vivo methods. Correlation analysis indicated significant agreement between in vitro and human in vivo methods. Correlation between the rat in vivo and human in vivo methods were also significant but correlations between the in vitro and rat in vivo methods were less significant and, in some cases, not significant. The comparison supports the contention that the in vitro method allows a rapid, inexpensive, and accurate estimation of nonheme iron availability in complex meals.     

Rapid detection cytomegalovirus pneumonia in recipients of bone marrow transplant: evaluation and comparison of five survey methods for bronchoalveolar lavage fluid

To detect cytomegalovirus-associated interstitial pneumonia (CMV-IP) in recipients of BMT in its earliest stage, five CMV methods were assessed for their usefulness using bronchoalveolar lavage fluid as the test specimen. Of the 43 cases enrolled in the study, PCR was positive in 12 cases, shell vial in eight, culture in eight and cytology in three. There were no positive cases in in situ hybridization. Based on this result, the 43 cases were classified into four groups: Group 1, three cases: positive in PCR, shell vial and cytology; Group 2, five cases: positive in PCR and shell vial; Group 3, four cases: positive only in PCR; and Group 4, 31 cases: negative in all CMV tests. Cases in Group 1 were judged as having the highest risk of overt CMV-IP. They were successfully treated with a combination of ganciclovir and immunoglobulin. Group 2 was diagnosed as having active CMV infection and ganciclovir monotherapy was effective for these patients. Groups 3 and 4 were not given anti-CMV therapy, but they were free from CMV-related manifestations throughout the study. The sensitivity and specificity of each survey method for the detection of Groups 1 and 2 were 1.0 and 0.89 in PCR, 1.0 and 1.0 in shell vial, 0.88 and 1.0 in culture, and 0.38 and 1.0 in cytology. Similarly, the positive and negative predictive values were 0.67 and 1.0 in PCR, 1.0 and 1.0 in shell vial, 1.0 and 0.97 in culture, and 1.0 and 0.88 in cytology. Thus, CMV survey on bronchoalveolar fluid was thought to be useful in detecting post BMT CMV-IP in its earliest stage.     

Concentration of metals, ceruloplasmin, metallothionein and the activity of N-acetyl-beta-D-glucosaminidase and gamma-glutamyltransferase in pregnant women who smoke and in those environmentally exposed to tobacco smoke and in their infants. Part I

Concentrations of metals (Zn, Cu, Se, Cd), metallotionein (MT) and ceruloplasmin (Cp), and the activity of N-acetyl-beta-D-glucosaminidase (NAG) and gamma-glutamyltransferase (gammaGT) in pregnant women who smoke and in passive smokers as well as in their newborns were measured. In smoking women a many-fold increase in cotinine concentrations in maternal and infant urine, amniotic fluid, placenta and milk was found as compared to passive smokers. Smoking lowered serum Se concentration in mothers and infants, increased serum ceruloplasmin in mothers and decreased serum Cu concentration in infants. Serum Zn level in infants was higher than in mothers, and smoking furthered its increase. Statistically significant increase in concentrations of Cd in placenta, amniotic fluid and milk, of Cu in placentae and amniotic fluid and of Zn in placenta and milk was revealed. Higher concentrations of metals were accompanied by an elevated MT level in placenta and amniotic fluid. In smoking women a significant increase in NAG activity in urine, amniotic fluid and milk, increase in gammaGT activity in urine and amniotic fluid and decrease in gammaGT activity in milk and placenta were observed. There was high, positive correlation between MT/NAG and MT/gammaGT in amniotic fluid of passive and active smokers, while similar correlation in milk was indicated only in the group of active smokers. The biochemical parameters analysed proved their usefulness in the evaluation of effects of exposure to cigarette smoke on pregnant woman and her fetus.     

Forty years of evolution of mortality in Belgium and The Netherlands

Age adjusted mortality in Belgium (B) and The Netherlands (NL) was calculated from 5 yearly age-specific death rates between the ages 45-74 and 75-85+ years. Mortality was available in Belgium from 1954 to 1991 or 1994 (depending on the cause of death) and from 1950 to 1993 in The Netherlands. In the 45-74 years age class all-cause mortality decreased in B between 1955 and 1992 with 33% in men and 48% in women. In NL this was 11% and 40%, respectively. In the age class 75-85+ it was 21% and 37% in B, and 4% and 36% in NL, respectively. Since 1980 to the last available year there was a marked decrease in mortality in the age class 75-85+ years in men and women from B and no change in NL. Wallonia always had the highest mortality, followed by B, Flanders and NL. However, recently the observed mortality in Flanders was the lowest. Mortality trends, in both age classes and sexes, were obtained between 1980 to the last available year for 11 causes of death in men and 13 in women. Among 48 possible comparisons, 38 (79%) were in favor of B, 9 in favor of NL and 1 ex aequo. Life expectancy in 1992 was compared in the 15 EU countries. For both sexes together B ranked 8th, NL 3rd. The difference in life expectancy between the two countries was 3 year in 1967 and 1 year in 1992. Flanders ranked 5th (0.3 year lower than NL) and Wallonia 14th (2.2 years lower) when substituted for B in the EU. Portugal had the best and Denmark had the worst results between 1967 and 1992). Changes in life style-fat, salt, fruit and vegetable intake and smoking habits -which occurred since 1960 in B, its regions and in NI are consistent with the changes in mortality and life expectancy. Curative medicine and medical technology cannot explain the observed differences and trends.     

Diagnostic value of hysterosalpingography and laparoscopy in infertile women

Tubal pathology with tubal blockage due to the pelvic inflammatory diseases is one of the most frequent causes of infertility in a woman [1]. The two most important diagnostic procedures which are used for evaluation of tubal patency are hysterosalpingography and laparoscopic hydrotubation [4]. SUBJECT: The aim of the study was the comparison of hysterosalpingographic and laparoscopic findings and determination of accuracy of these two procedures in the diagnosis of tubal patency. MATERIAL AND METHODS: We studied and compared the results of hysterosalpingography and laparoscopy in 102 infertile women who were operated on at the Narodni Front Hospital of Gynaecology and Obstetrics in Belgrade during 1993 and 1994. Of 102 operated women 47 women were with primary infertility and 55 with secondary infertility. The patients were from 20 to 41 years of age, the average 28 +/- 2.4 years. RESULTS: Of one hundred and two operated women tubal blockage was found in 94 (92.1%) patients. Unilateral hydrosalpinx was found by hysterosalpingography in 16 (15.7%) subjects and bilateral hydrosalpinx in 30 (29.4%) women. Unilateral hydrosalpinx was found by laparoscopy in 17 (16.1%) patients and bilateral hydrosalpinx in 32 (31.4%) subjects. The concordant findings by hysterosalpingography and laparoscopy in the diagnostics of unilateral hydrosalpinx were found in 76.5% of cases, and in bilateral hydrosalpinx in 70.4%. This difference was not statistically significant. Unilateral tubal blockage was identified by laparoscopy in 26 (25.5%) patients and bilateral in 27 (26.5%) subjects. The concordant findings by hysterosalpingography and laparoscopy in unilateral tubal blockage were found in 61.5% of cases, and in bilateral tubal blockage in 70.4% of women. The total concordant findings by hysterosalpingography and laparoscopy in tubal blockage were found in 65.7 of cases, and concordant findings after hysterosalpingography and surgery were noted in 61.7% cases. The findings by laparoscopy and surgery were in harmony in 86.3% patients. Ovarian abnormalities were found by laparoscopy and surgery in 22 (21.6%) women. Pelvic adhesions were found by laparoscopy in 42 women of 49 patients in whom pelvic adhesions were found during the operation. Uterine congenital anomalies were found by laparoscopy in 3 (2.9%), women and by hysterosalpingography in 6 (5.9%) patients. DISCUSSION: Of 102 operated women tubal blockage was found in 94 (92.2%) women. Unilateral tubal blockage was found in 38 (40.4%) patients, and bilateral tubal blockage in 56 (59.6%) subjects. Hysterosalpingographic and laparoscopic hydrotubation findings in the diagnosis of tubal patency were concordant in 65% of cases, hysterosalpingographic and operative findings in 61.7% of patients, and laparoscopic and operative findings in 86.3% of subjects. Although concordant findings of 65.7% were noted in this study, which were similar to findings of other authors, the percentage of 62.5% [4], and 76% was observed [5]. During the operation pelvic adhesions were found in 49 patients, and laparoscopic in 42 women only. Ovarian abnormalities were found by laparoscopy in 22 (21.6%) patients, while uterine fibroid was found in 10 (9.8%) subjects. Uterine congenital anomalies were found by hysterosalpingography in 6 (5.9%) cases and by laparoscopy only in 3 (2.9%) patients. The advantage of visual hysterosalpingography seems to be in identification of some congenital uterine anomalies. However, the advantage of laparoscopy is identified by the possibility of visualisation of some other pelvic abnormalities which may be the cause of infertility. CONCLUSION: There are some hysterosalpingographic and laparoscopic advantages and disadvantages in the diagnosis of infertility in women. Only by using both procedures accurate results can be achieved in the tubes, the uterus and the ovary, that can be a cause of infertility in women.     

Phosphorus deficiency, parathyroid hormone and bone resorption in the growing rat

Sham-operated and parathyroidectomized (PTX) rats were divided into two pair-fed groups, one on a normal mineral intake (0.5% Ca, 0.3% P), the other on a regimen low in phosphorus (0.5% Ca, 0.03% P). P depletion led to a drop in plasma P and urine P, a rise in plasma Ca and a marked rise in urine Ca, a drop in serum magnesium and a rise in urine Mg. The changes were more pronounced in the PTX animals, but final values were the same in both groups. Parallel bone-seeking isotope (85Sr, 177Lu, 237Np) studies in nonablated animals revealed an increase in the urinary nuclide output and in the urine/tibia ratio in P-deficient animals. Normal and primary bone osteocytes decreased and enlarged osteocytes increased as a result of P deficiency; osteoclasts and osteoblasts also increased. Bone composition showed a drop in ash content and a rise in water, with a light decrease in both Ca and P, and a corresponding rise in hydroxyproline and nitrogen in the P-deficient animals. The results are interpreted to mean that P-deficiency in the young growing rat leads to an increase in bone resorption which occurs also in the absence of parathyroid hormone (PTH). The fact that final values were similar in the control and PTX P-deficient animals suggests that steady-state regulation can also occur without PTH. Because P-deficiency leads to rapid hypercalcemia and rapid marked hypercalciuria, there may exist a mechanism for phosphate regulation which would then supersede Ca homeostasis. The change in serum and urine Mg levels may reflect a decrease in tubular Ca and Mg reabsorption associated with P-deficiency.     

Leiomyosarcoma of the esophagus: results of surgical treatment

BACKGROUND: This study examined the results of surgical treatment of leiomyosarcoma of the esophagus. METHODS: Between January 1920 and December 1996, 17 patients (9 men and 8 women) with leiomyosarcoma of the esophagus were treated surgically at the Mayo Clinic. Median age was 58 years and ranged from 26 to 76 years. Symptoms included dysphagia in 11 patients (64.7%) and odynophagia in 6 (35.3%). The tumor was located in the middle third of the esophagus in 10 patients (58.8%) and in the cervical esophagus in 7 (41.2%). Procedures performed included esophagogastrectomy in 9 patients (Ivor Lewis in 5, left thoracoabdominal in 3, and transhiatal in 1), enucleation in 3, transgastric excision in 1, and exploration without resection in 4. RESULTS: The procedure was considered curative in 11 patients (64.7%). There was one operative death (mortality, 5.9%). Complications occurred in 3 patients (17.6%) and included anastomotic leak in 2 and bleeding requiring reoperation in 1. Growth pattern was infiltrating in 7, polypoid in 5, and intramural in 5. Histologically, the tumor was grade 1 in 6 patients, grade 2 in 2, grade 3 in 7, and grade 4 in 2. The tumor was postsurgically classified as stage I in 2 patients, stage IIA in 7, stage IIB in 1, stage IIIA in 5, stage IV in 1, and unknown in 1. Six patients (35.3%) received adjuvant treatment. Follow-up was complete in 16 patients (94.1%) and ranged from 1 to 182 months (median, 48 months). Five- and 10-year actuarial survivals were 47.0% and 31.0%, respectively. Seven patients (41.2%) are currently alive (median survival, 72 months); all underwent curative resection. Factors affecting survival included completeness of resection, growth pattern, postsurgical stage, tumor grade, and tumor location (p < 0.05). CONCLUSIONS: We conclude that leiomyosarcoma of the esophagus is rare. Complete resection provides long-term survival.     

Advantages and disadvantages of various access routes in sonographic diagnosis of dysplasia and luxation in the infant hip

Changes in copper concentration in the arterial wall are important because of cross-linkage formation in collagen and elastin. The breakdown of the elastic layer is characteristic for aneurysm and is affected by the abnormalities in copper metabolism. This study was undertaken to evaluate Ca, Mg, Zn and Cu concentrations and their relationships in the arterial wall, serum and calcified plaque in atherosclerosis obliterans (AO) and abdominal aortic aneurysm (AA). Samples of the aorta wall were obtained at the endarterectomy in AO and the vascular reconstruction in AA. Elements were determined by means of atomic absorption spectrometry. Serum concentrations of Zn and Cu were higher and that of Ca lower in AO as compared to AA and the controls. Arterial concentrations of Zn, Cu and Mg were higher in AO as compared to AA. The ratios of element concentrations in serum (Ca/Mg, Ca/Zn and Mg/Cu) were higher in serum in AA than in AO. Positive correlations were calculated for Ca and Mg (r > or = 0.74), Ca and Zn (r > or = 0.73), Mg and Zn (r > or = 0.90) in the arterial wall in AO and AA. Low but significant correlation was calculated for Cu concentrations between serum and the arterial wall in AA (r = 0.43). Concentrations of Ca, Mg, Zn and Cu were higher in plaque than in the surrounding tissue. The results indicate differences in arterial and serum concentrations of Ca, Mg, Zn and Cu between AO and AA and the accumulation of these elements in the plaque rather than in the surrounding vascular tissue.     

SP-A2 gene expression in human fetal lung airways

In the present study, we characterized surfactant protein (SP)-A messenger RNA (mRNA) in mid-trimester human fetal trachea and bronchi. SP-A protein was localized by immunocytochemistry to scattered epithelial cells in the airway surface epithelium and in submucosal glands of the fetal trachea and bronchi. SP-A mRNA (2.2 kb) was detected by Northern blot analysis in human fetal trachea, as well as in primary and more distal bronchi. The levels of detectable SP-A mRNA were highest in the upper airways and were decreased in smaller bronchi in comparison. SP-A mRNA was barely detectable in the distal fetal lung tissue. In contrast, SP-A mRNA was abundant in cultured explants of distal human fetal lung tissue. SP-A1 and SP-A2 mRNA were detected by primer extension analysis in adult human lung tissue and in cultured human fetal lung explants. Only SP-A2 mRNA was detected in RNA isolated from human fetal trachea and bronchi. SP-A mRNA was localized by in situ hybridization in the fetal trachea and bronchi in scattered cells in the surface epithelium and, most prominently, in submucosal glands. Our results suggest that SP-A2, and not SP-A1, is produced in the human fetal tracheal and bronchial epithelium and in submucosal glands.