美国麦克唐纳钢铁厂轧钢机改造

结合美国麦克唐纳厂型钢轧机的改造项目，介绍了该厂老式轧机改造的技术特点和设计思路，为国内外老轧机改造提供了经验。     

高炉鼓风机增加电动放风阀改造分析

介绍了高炉鼓风机增加电动放风阀改造项目的目的、内容和实施过程，分析了电动放风阀位置变送器升级、调节方法及技术创新点，并对改造后的项目经济效益、技术推广应用前景进行了分析研究。     

焦炉出焦除尘的电机车改造

杭钢焦化厂在焦炉出焦除尘项目中，结合现场实际，攻克技术难题，对现有电机车进行技术改造。解决了生产与改造工作产生的矛盾，达到除尘改造项目的工艺要求。     

再谈改造项目的经济效益

论述了改造项目的存量,总量和增量三种效益概念和单方案改造项目的判断标准以及多方案改造项目的比选,并提出了在测算改造项目效益时应注意的几个问题。     

华锡铜坑矿技改节电显著

柳州华锡集团公司于2007年底实施了铜坑矿3^#风机变频调速节能改造、2^#号竖井副机电控系统改造及6^#螺杆式压风机等3个节能改造计划项目，并于2008年初完成，经过了安装、调试及9个月的生产试运行，2008年10月14日，集团公司对这3项节能改造项目进行验收，标志着该矿2008年节能降耗取得了实质性进展。验收意见认为，3^#风机变频调速节能系统改造等3个项目已达到节能、消除安全隐患、确保生产顺畅进行的预期效果，改造取得圆满成功。经测算，年可节约电能120万kwh。     

首条双机架铝带冷连轧线单机冷试车

西南铝业（集团）有限责任公司在其“十一五”发展目标中，提出通过三五年时间，于2010年前建设实施在线填平补齐改造、军工配套改造和冷连轧产能配套改造三大系列技改项目，实现“再造一个西南铝，打造世界一流铝加工企业”的宏伟目标。目前，铝带冷连轧技改项目、厚板技改项目及一些中小技改项目正齐头并进、按计划有序进行。     

天津钢铁集团有限公司高线搬迁改造项目通过国家验收

7月25日国家财政部委托辽宁节能中心和投资审核中心对天津钢铁集团有限公司高线搬迁改造项目进行了审核，通过两天的审查和与沟通，专家组综合高线煤气回收情况，最终确认该项目节能量为3．4746万吨标准煤，以节约每吨标准煤奖励200元额度，公司高线搬迁改造项目共获得695万元节能奖励资金。     

济钢焦油工程改造采用多项先进技术

近日，济钢煤焦油加工工程改造项目建成投产，该项目投产后可年产焦油10万t。该工程是济钢焦炉改造配套项目，其工艺装备水平和节能环保技术都是我国目前最先进的，具有10多项济钢的自主产权。     

SINUMERIK经济型数控系统在VDF数控机床电气系统改造中的应用

介绍了SINUMERIK 802S系统在VDF数控机床改造项目中的应用方案、数控系统的硬件构成以及软件系统的控制功能。机床改造后工作稳定可靠，达到了设计要求和改造目的。     

鞍钢φ159MPM连轧管机组工艺技术研究

介绍了鞍钢φ159MPM连轧管机组改造方案的确定，工艺技术参数，本项目引进mini-MPM核心设备和技术，采用先进技术利旧改造原自动轧管机组，产生多项创新技术，优化了生产工艺，大幅降低了投资，提高效益，为无缝钢管老机组改造提供了新模式。     

国外铁矿粉烧结理论与技术的进展(二)

近年来,国外在铁矿粉烧结理论研究和技术方面取得了长足的进步,尤其体现在烧结过程相图的发展、烧结SFCA理论的完善、预还原烧结的开发、镶嵌式烧结的设计、高温特性研究的不断深入、烧结模拟技术的发展等方面,本文对此进行了简要介绍。     

国外铁矿粉烧结理论与技术的进展(一)

近年来,国外在铁矿粉烧结理论研究和技术方面取得了长足的进步,尤其体现在烧结过程相图的发展、SFCA理论的完善、预还原烧结的开发、镶嵌式烧结的设计、高温特性研究的不断深入、烧结模拟技术的发展等方面,本文对此进行了简要介绍。     

变形镁合金的塑性改善研究现状

镁合金通常塑性较差,改善其塑性是实现其规模化应用的需要。在介绍镁合金塑性变形机制的基础上,主要包括滑移、孪生和晶界滑动机制等,讨论了传统改善其塑性的方法,即优化合金成分、控制组织和协调变形温度-速度条件以及目前提高塑性的新途径,包括提高等轴晶比例、控制脆性相的形态及分布和施加外场等。简述了变形镁合金超塑性的机制与应用,提出了镁合金超塑性未来的发展方向。     

把握全面深化改革总方向 开创铁矿资源开发新格局

发挥市场在配置资源中的决定性作用、深化财税体制改革、加快生态文明制度建设、构建开放型经济新体制等是全面深化改革对铁矿产业发展的新要求。维护国家经济利益和国民经济产业安全、夯实钢铁产业转型升级和提高竞争力的基础、充分体现生态文明建设精神和珍惜矿产资源的原则、加强矿产资源综合利用、建设安全和谐的矿山等是铁矿行业中长期发展规划编制的核心宗旨和理念。通过发挥行业协会作用,提升铁矿行业战略地位,推动管理创新,挖掘企业内部潜力,优化产业组织结构等措施,开创铁矿生产开发新局面。     

Processing of thin sheet multiphase steel grades

Despite the extensive research and development work done in the field of high strength thin sheet multiphase steel grades, in the past, there are still two main challenges to be tackled, particularly for steel grades with tensile strength levels above 780 MPa. First a challenging optimisation and improvement of the overall processing in the steel plant is still necessary. This includes modified and improved layouts of processing lines. Further, due to the limited application and lacking feedback an overall customer oriented development and optimization is still necessary. Therefore, in a first step, this work reports on the alloy concepts and phase transformations in the annealing lines required for the adjustment of the microstructure of DP and TRIP grades. Then, the most critical processing steps are mentioned and in particular the demanded processing parameters in the annealing lines and the resulting layouts are highlighted. In a further part, three selected items of a costumer oriented development and optimisation of DP and TRIP steel grades are discussed. These include the improvement of the flange‐ability and bendability and efforts oriented towards the reduction of the banded structure in DP and TRIP steel grades. Finally, the improvement of the fracture appearance of spot welded joints of TRIP steels is highlighted and alloy concepts with a balance between weldability and formability are introduced.     

Microstructures and mechanical behavior of NiAl-Mo and NiAl-Mo-Ti two-phase alloys

The phase relationship in the NiAI-Mo system is characterized by a eutectic equilibrium between binary NiAl and the terminal (Mo) solid solution, thereby offering the potential for development of ductile-phase-toughened composites. A study was conducted to evaluate the effect of varying volume fraction of the (Mo) phase on the microstructure, bend strength, and ambient temperature fracture behavior of selected NiAI-Mo two-phase alloys. Above room temperature, the NiAI-Mo alloys showed an increase in bend strength compared to monolithic NiAl, with reasonable strength retention up to ≈800 °C. The results demonstrated moderate improvements in toughness in the NiAI-Mo alloys in comparison to monolithic NiAl. A further enhancement in toughness was realized through hot working. Fractography studies showed evidence for substantial decohesion between the (Mo) phase and the NiAl matrix, thereby suggesting the presence of a weak interface. This weak interface between the (Mo) phase and the NiAl matrix, in conjunction with modulus mismatch stresses, causes the crack to deflect from the (Mo) rein-forcement and propagate preferentially along the (Mo)/NiAl interface. These attributes limit the potential for significant ductile-phase toughening in the NiAI-Mo system. An addition of 0.2 at. pct Ti resulted in a marked improvement in the room-temperature fracture toughness of NiAI-Mo. Fractography observations show some evidence for (Mo)/NiAl interface strengthening with the Ti addition.     

Factors affecting smoking of elementary and high school children from Chile

The outcome of orthodontic treatment involving early extraction of 4 second molars was evaluated in 52 patients (29 girls, 23 boys). Computer-assisted analysis of cephalograms, casts and panoramic X-rays was performed at the start (T1, mean age 11.5 years) and at the end (T2, mean age 14.4 years) of treatment. Following treatment, mesial migration of upper and lower first molars was counteracted; however, treatment only moderately influenced normal development of the position of the incisors and the profile. At the end of treatment, the third molars had erupted in only 3 patients. Nevertheless, on average a significant mesial movement of these teeth was observed. In addition, there was a significant improvement in the axial inclination of the third molars, especially in the upper arch. This improvement was correlated with the original position of the teeth. All patients needed a longer follow-up period and it seems reasonable that some of them might require a second treatment phase to adjust the position of the third molars.     

A randomized trial of the effectiveness of cognitive-behavioral therapy and supportive counseling for anxiety symptoms in older adults.

The authors used a randomized trial to compare cognitive-behavioral therapy (CBT) and supportive counseling (SC) in the treatment of anxiety symptoms in older adults who met Diagnostic and Statistical Manual of Mental Disorders (4th ed.; American Psychiatric Association, 1994) criteria for anxiety disorders. Both conditions had a 6-week baseline no-treatment phase. Treatment was delivered primarily in patients' own homes and in an individual format. Outcomes were assessed at posttreatment and at 3-, 6-, and 12-month follow-ups. There was no spontaneous improvement during the baseline phase. Both groups showed improvement on anxiety measures following treatment, with a better outcome for the CBT group on self-rating of anxiety and depression. Over the follow-up period, the CBT group maintained improvement and had significantly greater improvement than the SC group on anxiety and 1 depression measure. Treatment response for anxiety was also superior for the CBT group, although there was no difference between groups in endstate functioning. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

中国双相不锈钢的发展及研究进展

结合中国双相不锈钢发展的特点,从技术进步、产量增加、应用拓展、发展趋势等方面阐述其发展情况。跟随国际发展趋势,中国双相不锈钢经历了从第1代到第3代及经济型双相不锈钢的发展历程,特超级双相不锈钢的开发及应用也在积极探索中。中国双相不锈钢研发虽然起步晚,但在发展初期就与国际同步确立N合金化的现代双相不锈钢发展方向。中国双相不锈钢从业者一贯注重工艺改进和技术进步,在组织控制及性能提升、热塑性和析出相等多方面的研究及进步,特别是近年来在双相不锈钢组织及性能平衡调控、低温冲击韧性研究及提升性能方面的进展,将有力支撑中国双相不锈钢产量的增长及应用的拓展。伴随技术及市场形势的发展,中国双相不锈钢产量在2015—2021年得到快速增长,其中2021年的产量达到24.06万t。可以预见,中国双相不锈钢将在质量、产量、品种、应用等多方面得到进一步的发展。     

Perception and action in depth

The purpose of this clinical study was to determine the efficacy, tolerability, and impact on quality of life of domperidone--a specific peripherally acting dopamine antagonist--in the management of symptoms of gastroparesis, a common and potentially debilitating condition in patients with diabetes mellitus. In the first phase of this multicenter, two-phase withdrawal study, 287 diabetic patients with symptoms of gastroparesis of at least 6 months' duration received domperidone 20 mg QID in a single-masked fashion for 4 weeks. Efficacy was evaluated using a four-point rating scale (0 = none, 1 = mild, 2 = moderate, 3 = severe) for each of the following symptoms: nausea, abdominal distention/bloating, early satiety, vomiting, and abdominal pain. At the end of the first phase, patients with sufficient improvement in their total symptom score (a score < or = 6 and a decrease in score of > or = 5 units from the baseline [selection] visit) were eligible for the 4-week, randomized, placebo-controlled, double-masked withdrawal phase of the study. The impact of domperidone on quality of life was determined using the Medical Outcomes Study Short Form-36 (SF-36). Of 269 patients with data from the single-masked phase, 208 (77%) qualified for entry into the double-masked phase based on a statistically significant improvement in total symptom score, from a mean score of 10.32 at baseline (initial visit) to 3.79 after 4 weeks of single-masked domperidone therapy. During the double-masked phase, patients in the placebo group had significantly greater deterioration in total symptom scores compared with patients in the domperidone group (mean changes of 1.84 and 0.85, respectively). Similar significant differences in favor of domperidone were seen in the secondary efficacy variables (i.e., patients' diary scores and global assessments of symptoms). The tolerability profile of domperidone was similar to that of placebo. Patients who responded to domperidone experienced significant improvements in quality of life, as indicated by the SF-36 physical and mental component summary scores. During the double-masked phase, patients who were randomized to placebo experienced a significant deterioration in the physical component summary score compared with patients in the domperidone group. The results of this study suggest that domperidone 20 mg QID provides significant improvement in the upper gastrointestinal symptoms of diabetic gastroparesis and is well tolerated in patients with this condition.