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1.
超细铜粉的制备工艺研究进展   总被引:1,自引:0,他引:1  
详细介绍了超细铜粉的各种制备方法,包括各种物理和化学方法,并对各种制备方法的过程、优缺点及其应用情况进行简要评述,指出了今后超细铜粉制备需要关注的问题,点明了今后超细铜粉的研究方向。  相似文献   

2.
简要介绍了企业内部控制的内涵与作用,分析了现行企业内部控制存在的各种问题,并对完善企业内部控制的对策进行了深入探讨。  相似文献   

3.
从浸金溶液中回收金的研究概况   总被引:6,自引:0,他引:6  
介绍了从溶液中回收金的主要技术,包括:置换沉淀技术、炭吸附技术、树脂吸附技术、溶剂萃取技术等。简要评述了各种方法的应用情况及其各自的优缺点,也对这些技术应用中存在的问题提出了看法。  相似文献   

4.
综述了近年来国内外在精准农业中农田管理区划分上应用的主要方法,包括K均值聚类算法、模糊C均值聚类算法、加权模糊聚类算法、粒子群优化算法以及改进的蚁群聚类算法概述了各种方法的原理,比较了各种处理方法的优缺,并对分区方法做了简要概括,最后指出了目前研究中存在的问题及今后的研究方向.  相似文献   

5.
文章简要介绍了国内转炉除尘技术的发展现状,分析各种工艺技术的优缺点,以及适用的条件,并对转炉除尘技术的发展趋势做了简要分析。  相似文献   

6.
简要介绍了目前工业生产中常用的燃气燃烧器的种类,各种燃烧器的基本原理、特点,并根据各种燃烧器的特点分别介绍了其在工业中的适用场合。  相似文献   

7.
十六、讨论1.由于理论家的新发现,各种模型被讨论,这些模型能够说明所观测到的高临界温度,也能描述其它事实。在和的工作中,分析了这些问题。这里只想作简要的评议。  相似文献   

8.
简要介绍了窑炉常用电热元件的各种特性及相应的控制方式,给出了一些使用经验。  相似文献   

9.
简要回顾了AB5型储氢合金的发展历程,综述了元素替代对AB5型储氢合金相结构与储氢性能的影响,总结了各种元素进行替代的研究进展。就目前的研究现状指出了元素替代在AB5型储氢合金应用中存在的问题以及今后的发展方向。  相似文献   

10.
废定影液中银的回收与提纯   总被引:9,自引:2,他引:7  
熊道陵  林俊 《黄金》2007,28(5):46-49
从废定影液中回收银的方法主要有:沉淀法、还原法、气浮法、电解法、离子交换法等.文中针对这些方法的基本原理及工艺做了简要介绍,并对各种方法优缺点进行了简要评述.  相似文献   

11.
顾桦 《冶金丛刊》2002,(3):27-29,21
本文简述了广钢供电系统应用Lonworks网络技术实现CSC2000变电站综合自动化系统的原理,针对主变压器运行的特点和重要性,介绍该系统中变压器间隔保护,监控与测量单元的设计原则。按该原则构成广钢变电站的变压器保护和测控单元,既保证了保护的可靠性和独立性,又满足当地监控和运动的功能要求。  相似文献   

12.
壳式电炉变压器故障分析与修复   总被引:1,自引:1,他引:0  
介绍了壳式电炉变压器绕组绝缘故障的检查、判断与修复过程,对相关问题进行了简要探讨。  相似文献   

13.
本介绍了通过对保安变压器一,二次侧断路器继电保护,保安负荷(电动机)起动转矩接触线圈电压及保安变压器过负荷能力的计算和校验,确保了保安负荷自启动成功,并概述了主供电源消失保安电源自投,全厂保安负荷自启动的工业实践过程。  相似文献   

14.
The authors evaluated the efficacy of a brief image-based prevention intervention and assessed current drug use as a moderator of intervention effects. In a clinical trial, 416 high school-age adolescents were randomized to either the brief intervention or usual care control, with data collected at baseline and 3-month follow-up. The brief intervention consisted of a tailored in-person communication and a series of parent/guardian print materials based on the behavior–image model. Health behavior goal setting increased for participants receiving the brief intervention, with an effect size in the small range (d = 0.33). Overall effect sizes for cigarette smoking frequency and quantity and alcohol use frequency and quantity were small (ds = 0.16–0.21) and in favor of the brief intervention. However, adolescents reporting current substance use who received the brief intervention reduced their frequency and heavy use of alcohol, frequency and quantity of cigarette smoking, and reported fewer alcohol/drug problems, with larger effects ranging from small to approaching medium in size (ds = 0.32–0.43, ps  相似文献   

15.
The efficacy of brief treatments for media-recruited pathological gamblers was tested in a randomized clinical trial design (N = 314). Two self-directed motivational interventions were compared with a 6-week waiting list control and a workbook only control. Brief motivational treatment involved a telephone motivational interview and a mailed self-help workbook. Brief motivational booster treatment involved a telephone motivational interview, a workbook, and 6 booster telephone calls over a 9-month period. Primary outcomes were gambling frequency and dollar losses. As hypothesized, brief and brief booster treatment participants reported less gambling at 6 weeks than those assigned to the control groups. Brief and brief booster treatment participants gambled significantly less often over the first 6 months of the follow-up than workbook only participants. However, the workbook only participants were as likely to have significantly reduced their losses over the year and to have not met criteria for pathological gambling. Contrary to the hypothesis, participants in the brief booster treatment group showed no greater improvement than brief treatment participants. These results provide further support for the value of brief motivational treatments for pathological gambling. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

16.
Reviews the book, The first session in brief therapy edited by Simon H. Budman, Michael F. Hoyt, and Steven Friedman (see record 1992-98543-000). This book provides an overview of the models of brief psychotherapeutic intervention. A major focus is how brief therapists structure and manage their initial contact with the patient. The editors intend this volume to be a casebook in which the reader can learn what therapists actually do in their clinical practice and offers the reader opportunities to further develop and sharpen his/her thinking regarding brief therapy. According to the reviewer, this book provides a fine survey of the current diversity of approaches to brief therapy. Taken as a whole, the book stimulates considerable thought on the most efficacious use of time in psychotherapy and will appeal to a wide audience including graduate students. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

17.
Purposes of the present study were to (a) examine psychometric properties of a brief Smoking Consequences Questionnaire-Adult (SCQ-A) among an African American sample and (b) explore differences in smoking expectancies across levels of smoking-nicotine dependence. Four hundred eighty-four smokers attending an urban health clinic completed the brief SCQ-A. Maximum likelihood factor extraction with a varimax rotation specifying 9 factors replicated 9 factors of the original SCQ-A. Evidence for the brief SCQ-A's reliability and validity was found. Heavier and/or more dependent smokers had significantly higher scores than lighter and/or less dependent smokers on positive expectancies SCQ-A subscales. Results suggest the brief SCQ-A may be a useful alternative to the full scale SCQ-A. Results also provide evidence for the SCQ-A's validity with African American smokers. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

18.
张秀梅 《包钢科技》2005,31(Z1):4-5
介绍了绕包式,浇注式,H级绝缘非包封式三种干式变压器线圈绝缘结构类型及各自的性能特点,对中小型干式变压器制造的发展趋势进行了分析.  相似文献   

19.
王元 《有色金属加工》2011,40(3):54-56,4
本文介绍了整流变压器与配电变压器的主要特点、选型及应用。  相似文献   

20.
Examined therapist, patient, and system attitudinal factors in brief therapy practice. Attitudinal factors in brief and long-term therapy are contrasted, and technical treatment issues, patient selection, dangers, and future issues in brief therapy are discussed. Salient technical issues in brief psychotherapy include the maintenance of a clear and specific focus, a high level of therapist activity, flexible use of interventions, and encouragement of client activities outside therapy. Rather than presenting brief therapy as a specific school or model of treatment, an attempt is made to integrate various approaches that can make therapy beneficial within a well-planned, limited amount of time. (58 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

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