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Search Results: 1 - 10 of 51589 matches for " 宋继臣 "
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金属团簇化合物w{2}ag{4}s{8}(dppf){2}激发态非线性光学性质
董斌,,高亚,瑛林,雷明凯
材料研究学报 , 2004,
Abstract: ?用z扫描方法测量了金属团簇化合物w$_{2}$ag$_{4}$s$_{8}$(dppf)$_{2}$的非线性光学响应,发现团簇w$_{2}$ag$_{4}$s$_{8}$(dppf)$_{2}$具有显著的反饱和吸收和自聚焦等非线性光学性质.应用激发态理论分析了团簇w$_{2}$ag$_{4}$s$_{8}$(dppf)$_{2}$的非线性吸收和非线性折射,结果与实验数据一致.通过数值模拟获得激发态和基态吸收截面比值$k_{\rma}$及非线性折射度比值$k_{\rmr}$,阐述了$k_{\rma}$和$k_{\rmr}$的物理意义.确定了团簇w$_{2}$ag$_{4}$s$_{8}$(dppf)$_{2}$的三阶极化率$\chi^{(3)}$.团簇化合物w$_{2}$ag$_{4}$s$_{8}$(dppf)$_{2}$对脉宽为纳秒的激发脉冲限幅效果比较好.
特厚煤层分层工作面冲击地压事故后复产方案研究与实践
史先锋,姜福兴,朱海洲,,孙锦华,张俊杰,于显义,韩国庆
煤炭学报 , 2015,
Abstract: 在分析黑龙江峻德煤矿特厚煤层分层工作面重大冲击地压事故的基础上,研究得到事故发生的原因和相应的治理对策,制定了恢复生产的方案。提出了分层开采工作面恢复生产需满足的条件为:工作面和巷道围岩始终处于低应力低密度状态、消除底板(底煤和薄底板)冲击隐患、建立可靠支护、建立有效的实时监测体系和确定合理的开采强度。以煤层大直径钻孔为主实现围岩的低应力和低密度;提出了冲击危险巷道的基本支护、超前支护方式和强度;建立了应力实时在线监测为主、微地震监测为辅、多种监测手段联合的冲击地压实时监测预警体系;基于应力动态和微震监测确定工作面合理的开采强度。根据研究成果制定的恢复生产方案在峻德煤矿三水平北17层一段一分层3·15事故工作面实施后,保证了工作面安全恢复生产。
焊接构件裂纹统计分析

材料工程 , 1983,
Abstract: 飞机重要承力焊接构件是用30CrMnSiA和30CrMnSiNi2A合金结构钢制做的,在服役期间经常出现裂纹,本工作通过100架大修飞机的重要承力焊接构件裂纹的故障统计得出。
Excited--state nonlinear optical properties of metal cluster W$_{2}$Ag$_{4}$S$_{8}$(dppf)$_{2}$
金属团簇化合物W2Ag4S8(dppf)2激发态非线性光学性质

DONG Bin ZU Jifeng GAO Yachen SONG Yinglin LEI Mingkai,
董斌
,,高亚,瑛林,雷明凯

材料研究学报 , 2004,
Abstract: The nonlinear optical effect of metal cluster compound W2Ag4S8(dppf)2 was investigated using frequency-doubled, Q-switched Nd-YAG pulse laser system with wavelength of 532 nm and pulse width of 8 ns. The cluster W2Ag4S8(dppf)2 possessed reverse saturation absorption and self-focusing refraction. The nonlinear absorption and nonlinear refraction of the cluster W2Ag4S8(dppf)2 were explained with excited-state theory. The theoretical results are in agreement with the experimental data. The ratio of cross-section of the absorption of the excited-state to that of the ground-state Ka and the ratio of refraction volumes of the excited-state to that of the ground-state Kr were gained based on their simulation of numerical value. The effective third-order susceptibility X(3) was deter mined for the cluster. The experiment results show that the cluster W2Ag4S8(dppf)2 has good optical limiting character for nanometer pulse.
寄生虫卵长期玻片标本的制做方法

动物学杂志 , 1982,
Abstract:
领悟社会支持对社交焦虑的影响:反刍思维的中介作用和社会阻抑的调节作用
,张守
- , 2016,
Abstract: 摘要: 本研究旨在探索领悟社会支持对社交焦虑的影响,深入探讨社会阻抑和反刍思维对该影响的作用。方法:采用问卷法,以471名职员为被试进行调查,数据结果分析采用Bootstrap分析方法。结果显示:(1)反刍思维在领悟社会支持和社交焦虑之间起中介作用。领悟社会支持通过降低反刍思维的水平,降低社交焦虑。 (2)社会阻抑调节领悟社会支持→反刍思维→社交焦虑中介模型的前半路径,社会阻抑改变了领悟社会支持对反刍思维作用的大小。
Abstract: Social anxiety is becoming a worldwide mental health problem and in-service staffs are one of several subgroups most vulnerable to this problem. According to the causality model, the lack of social support can lead to social anxiety. Empirical studies have found that perceived less social support may lead to higher social anxiety. But most of the studies pay more attention to individual factors such as personality to explore the influence mechanism on social anxiety. Far too less attention was paid to the point of interpersonal interaction. Rumination, passively and repetitively dwelling on and questioning negative feelings in response to distress, is a risky factor for the development of psychopathology (Hilt & Pollak, 2012). Social undermining is defined in a work context as behavior intended to hinder, over time, a worker’s ability to establish and maintain positive interpersonal relationships, work-related success, and favorable reputation (Duffy, Ganster & Pagon, 2002). In real life, individuals are affected by both social support and social undermining. Social undermining weakens the role of social support by adding pressures and lowering self-efficacy. The recent study has brought in social undermining and rumination to explore the influential mechanism of the perceived social support on social anxiety and aim to provide the basis for improving and alleviating the extension of social anxiety. Questionnaires are used as methodology to test the hypotheses in this essay. A total of 471 in-service staff (259 males & 212 females), aged from 24 to 55, participated in the study. This study has translated the social undermining scale and used PSSS, RRS, IAS. Bootstrap of Mplus is used as the analytic method to analyze and process the data. The result indicated that: (1) Rumination mediates the relation of perceive social support to social anxiety. Perceived social support predict rumination(β = -.256,P = 0.008) and rumination predicted social anxiety. (2) Social undermining moderate the effect of perceived social support to rumination. The interaction terms(perceived social support x supervisor social undermining) predict the rumination explicitly(β = 0.289, P < 0.001) and the interaction terms (perceived social support x coworker social undermining) also predict a rumination obviously (β = 0.289,P < 0.001). When the
滞后离散广义不确定系统的变结构控制
,高存
控制与决策 , 2007,
Abstract: 首先引入一种新的受限系统等价分解形式,将所给的系统分解成两个低维的子系统.其次设计了带有差分补偿器的切换函数,使得系统在准切换流形上的运动渐近稳定.然后在不确定项有界的条件下设计了离散变结构控制律,使得在控制的作用下,系统的解的轨迹于有限步内进入准切换流形的一个邻域内,并最终收敛于原点邻域内的一个小的抖振.最后给出了数值仿真曲线,以说明该综合设计方法的可行性和有效性.
服正清风痛宁致药疹2例
刘俐伶,
中国中药杂志 , 2002,
Abstract: 正清风痛宁治疗风湿及类风湿性关节炎疗效较好,但临床有引起过敏和发生药物性皮炎的报道[1,2]。我们在临床上也发现引起药疹的病例,现报告如下。病例1:患者,女,51岁。因患风湿性关节炎,于乐仁堂药店自购正清风痛宁肠溶片(湖南正清制药集团股份有限公司,生产批号 9909083),按药品说明书每次3片,每日3次服用,其间未服其它任何药物。服药1周后全身自面、颈及双手背起泛发性皮疹伴发热,最高温度为T385℃。于1999年12月14日....
一种基于随机段的固定音频检索方法
,王伟凝
计算机应用 , 2010,
Abstract: ?在固定音频检索的整体检索方法中,当检索目标较长时,检索时间会变得很长。为了减小检索时间,提出了一种基于随机段的音频检索方法。把整个检索过程分成随机段检索和整体匹配两个阶段:随机段检索是从参考模板中随机选择一段(随机段)作为检索目标进行检索;整体匹配是在随机段检索出的基础上,判断潜在目标信号是否为参考模板。把这种随机检索的方法应用到计算特征距离和直方图交集方法中,结果证明该检索方法的准确率可以达到90%以上,而且平均检索时间可以降低到随机段与参考模板的比值和整体检索时间的积。
山东蓬莱旅游业发展的资源基础与战略构想

资源科学 , 2005,
Abstract: 蓬莱市位于山东半岛北端,是中国古代四大港口和近代四大对外通商口岸之一,其历史悠久,知名度高,独特性强,文化积淀丰厚,高品位资源分布集中,具有丰富的人文旅游资源。本文全面分析了蓬莱旅游资源特征;并基于该市旅游产业发展现状及其在发展中存在的经济基础相对薄弱,产业结构偏低,市政建设欠缺等问题,提出了切实可行的客源分级策略、旅游资源深度开发策略、旅游文化开发策略;同时提出了相应的发展措施,建议把发展旅游业纳入政府工作议程,将旅游业作为蓬莱市经济发展的战略性产业,并在加强旅游环保和环保旅游的同时,实行联合促销,强化旅游宣传,促进旅游业的全面和健康的发展。
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