锚杆、锚索支护在综采工作面回撤中的应用

综采工作面采用锚杆、锚索支护回撤,解决工作面采后顶板压力大、顶板破碎难以回撤支架的问题,缩短了回撤工期,取得了一定的技术经济效益。     

恩诺沙星在余干乌鸡不同组织中的残留消除规律研究

目的 研究恩诺沙星可溶性粉在余干乌鸡各组织内的残留消除规律。方法 88只110d龄健康余干乌鸡,随机分为11组,以0.75 g/L饮水连续给药5 d。停药后第0.16、1、3、5、7、9、20、30、40 d采集肌肉、肝脏、肾脏、皮脂样本,经液相色谱-串联质谱法测定组织中恩诺沙星和环丙沙星残留量,计算药物代谢半衰期,并利用WT1.4软件计算恩诺沙星在余干乌鸡体内的休药期。结果 恩诺沙星在余干乌鸡体内的半衰期和休药期均长于普通肉鸡。恩诺沙星可溶性粉在余干乌鸡肌肉、肝脏、肾脏及皮脂中的休药期分别是110、64、67和208 d。结论 为保证乌鸡产品质量安全和消费者健康,推荐恩诺沙星可溶性粉在余干乌鸡体内的休药期应大于210 d。     

齿轮箱轴断裂分析

采用化学成分分析、断口分析、金相检验和力学性能测试,对某齿轮箱轴发生断裂的原因进行了分析。结果表明：其断裂模式为疲劳断裂,起源于退刀槽尖角位置,直角退刀槽造成应力集中产生疲劳裂纹;而原材料的锻造和热处理工艺不合理,加速了轴的疲劳断裂。     

The effects of modafinil treatment on neuropsychological and attentional bias performance during 7-day inpatient withdrawal from methamphetamine dependence.

The cognitive benefits of modafinil to patients undergoing 7-day inpatient withdrawal from methamphetamine (MA) dependence were examined as part of a double-blind, randomized, placebo-controlled pilot trial. Recent evidence has identified modafinil-related improvements in treatment outcomes for MA-dependent patients; however, the benefits to cognition function, which is critical to treatment success but known to be impaired, has yet to be examined. The first 20 participants recruited to the study were administered either 200 mg of modafinil (once daily) or placebo, and a neuropsychological test battery (including an MA version of the emotional Stroop task) at admission (n = 17) and discharge (n = 14). Follow-up interviews were conducted at 1-month postdischarge (n = 13). After participant withdrawals (3 in each group), treatment was associated with a significant improvement in immediate verbal memory recall and nonsignificant trend toward improvement on executive function and delayed memory tasks. No benefit was seen for measures of verbal learning, visual memory, processing speed, or verbal fluency. All participants showed a significant attentional bias for MA-related stimuli on the emotional Stroop task. The magnitude of bias predicted both retention in treatment and relapse potential at follow-up but was not significantly ameliorated by modafinil treatment. While nonsignificant, the effect sizes of modafinil-related improvements in executive function and memory were consistent with those found in more robustly powered studies of cognitive benefits in attention-deficit/hyperactivity disorder and schizophrenia, supporting the need for further research. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

四川盆地中部上三叠统排水找气可行性论证

四川盆地中部上三叠统砂岩储层裂缝系统之间在开发动态上表现出相互分隔性,不存在连通范围较大的边底水体,其自生自储的成藏特征决定了裂缝系统中必然气水共存。测试产水井是由于井孔储层位处裂缝系统的含水部位,产水能量主要依靠水体上方的天然气膨胀驱动。低产量排水过程将使裂缝系统中的气水界面按照排水找气理论模式缓慢下降,而高产量排水将使水体上方高流度的天然气尽早突破水体窜入井底产出。建议对川中上三叠统水井开展连续强排水,加大井底与上方天然气的压力差,以较快实现水井变成气水同产井的目的。     

UT-6型泡沫棒在大牛地气田的应用

通过对现场试验的成果总结,对UT-6型泡沫棒在鄂尔多斯盆地天然气藏的使用方式进行了描述,并对其效果进行了分析。认为泡沫排水采气工艺技术是实现鄂尔多斯盆地天然气藏气井稳产的有效措施,UT-6型泡沫棒在该地区是较好的药剂。     

上市公司国有股退出过程中存在的法律问题简析

国有股退出有利于上市公司股权结构的优化。目前我国证券市场上国有股退出的主要方式是减少国家在上市公司中的持股比例 ,即国有股减持。但在国有股退出过程中存在着配售或回购价格确定的法律依据不明、操作具有较强的行政色彩、不同的退出模式对公司和股东的影响不一等问题。为使我国证券市场健康发展 ,这些问题亟需立法解决     

基于LED光源反射的液固搅拌槽中颗粒悬浮特性测定的光纤法

提出一种基于LED光源反射的液固搅拌槽中固体颗粒悬浮特性测定的光纤法. 在直径0.38 m、底部为椭圆形的搅拌槽中,用该法对水-二氧化硅两相体系固体颗粒悬浮特性进行了测定. 结果表明,测量临界离底悬浮转速Njs的测量点应选择在搅拌槽下部区域,径向位置对Njs影响不大;在整个固含率范围内,光纤测量法与取样法测量结果较接近,平均相对误差为4.0%,目测法测定结果比取样法与光纤测量法稍高,光纤法比取样法更快速、简便,具有适用于不透明容器的优势,能快速测定最小均匀悬浮转速Nus,Nus随固含率增大而增大.     

Anxious solitude and peer exclusion predict social helplessness, upset affect, and vagal regulation in response to behavioral rejection by a friend.

It was hypothesized that combined individual child vulnerability (anxious solitude) and interpersonal stress (peer exclusion) would predict the strongest responses to experimentally manipulated behavioral peer rejection. Results indicated that in a sample of 3rd graders (N = 160, 59% girls), anxious solitary excluded children displayed more behavioral manifestations of social helplessness before and after behavioral rejection, reported more feelings of rejection in anticipation of and reaction to behavioral rejection, and were observably more upset during behavioral rejection than were normative children. Moreover, affective responses to behavioral rejection mediated the relation between anxious solitary excluded status and behavioral manifestations of social helplessness. Furthermore, anxious solitary excluded children versus anxious solitary children demonstrated excessive suppression of vagal tone and more sustained acceleration in heart rate during the experiment. Results also indicated that affective, social–cognitive, and regulatory processes directly contributed to children’s responses to behavioral rejection. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Latent inhibition, but not prepulse inhibition, is reduced during withdrawal from an escalating dosage schedule of amphetamine.

The enhanced locomotor and stereotypic responses of the rat to repeated amphetamine (AMPH) administration are considered to be an animal model of positive schizophrenic symptoms. In contrast, behaviors observed during withdrawal from repeated AMPH are believed to model depression or anxiety. In the present study, the authors tested whether AMPH withdrawal might also elicit behaviors consistent with animal models of schizophrenia, specifically, disruptions in latent inhibition (LI) of 2-way active avoidance and prepulse inhibition (PPI) of startle. Rats treated with escalating doses of AMPH (6 days, 1–5 mg/kg ip) or saline were tested for LI and PPI during withdrawal. LI was eliminated by prior AMPH treatment in rats tested at 4, 13, and 28 days of withdrawal. In contrast, PPI did not differ between AMPH and control groups. These results support an interrelationship between repeated-AMPH and LI-disruption, but not PPI-disruption, models of schizophrenia. (PsycINFO Database Record (c) 2010 APA, all rights reserved)