十位以上数字是3或6的多位数的积的捷算法     

李超 《湘南学院学报》1999,(1)

本文给出了除个位数字外,其余各位数字都是3或都是6的两个多位数的乘积的十分简捷的算法。  相似文献   

Evaluation of Dimensionality in the Assessment of Internal Consistency Reliability: Coefficient Alpha and Omega Coefficients          下载免费PDF全文

Samuel B. Green  Yanyun Yang 《Educational Measurement》2015,34(4):14-20

In the lead article, Davenport, Davison, Liou, & Love demonstrate the relationship among homogeneity, internal consistency, and coefficient alpha, and also distinguish among them. These distinctions are important because too often coefficient alpha—a reliability coefficient—is interpreted as an index of homogeneity or internal consistency. We argue that factor analysis should be conducted before calculating internal consistency estimates of reliability. If factor analysis indicates the assumptions underlying coefficient alpha are met, then it can be reported as a reliability coefficient. However, to the extent that items are multidimensional, alternative internal consistency reliability coefficients should be computed based on the parameter estimates of the factor model. Assuming a bifactor model evidenced good fit, and the measure was designed to assess a single construct, omega hierarchical—the proportion of variance of the total scores due to the general factor—should be presented. Omega—the proportion of variance of the total scores due to all factors—also should be reported in that it represents a more traditional view of reliability, although it is computed within a factor analytic framework. By presenting both these coefficients and potentially other omega coefficients, the reliability results are less likely to be misinterpreted.  相似文献   

Tb（3＋）共掺杂Al2O3：Eu粉体的结构及其光致发光研究     

刘世江  崔小敏 《河南职业技术师范学院学报》2011,(2):75-78

用碳酸氢铵和氨水的混合溶液来作复合沉淀剂,采用共沉淀法制备了Tb3＋共掺杂Al2O3：Eu粉体.用X射线衍射（XRD）对其相结构进行了研究,通过荧光分光光度计分析了Tb3＋离子共掺杂浓度对Al2O3：Eu的发光性能的影响.研究结果表明：Tb3＋掺杂提高了γ-Al2O3的热稳定性.并观察到Tb3＋→Eu3＋的能量传递,最佳掺杂浓度为5 mol%,提高了Al2O3：Eu的发光强度.  相似文献   

3G/ad hoc融合网络的性能分析     

李旭杰  沈连丰 《东南大学学报》2011,(3):233-238

针对3G/ad hoc融合网络提出了一种性能分析方法.接收功率与路径的衰减关系基于路径的自然损耗与阴影衰落.首先,对3G/ad hoc融合网络的应用场景模型进行了简要的介绍.然后,基于此网络的应用场景,提出了几种性能分析方法来计算融合网络的中断概率、掉话率、新呼叫用户拥塞率等性能指标,随后推导出相应的性能公式并与传统3...  相似文献   

基于OBD、GPS与3G的车辆远程管理系统设计     

王瑜  胡记文 《黄冈师范学院学报》2011,31(6):67-68

针对近年来超速驾驶、酒后驾驶、疲劳驾驶引发的交通事故层出不穷,设计了一种基于OBD、GPS与3G的车辆远程管理系统,通过OBD、GPS及酒精检测模块采集车辆速度、位置、连续行驶时间及空气酒精含量等参数,由3G模块传送至管理中心,从而实时、有效对车辆违规现象进行远程监控管理。  相似文献   

改性牡蛎壳去除Fe3＋离子废水的研究     

游东宏 《宁德师专学报(自然科学版)》2011,23(3):243-246

提出用改型牡蛎壳去除Fe3＋离子废水的新方法．在常压静态吸附实验中Fe3璃子浓度为1mg/L温度为30℃,pH值为3,实验结果表明：处理时间为1h时去除效率最高．在动态吸附实验条件下得出Fe3＋单位质量滤料的工作吸附量为0．1736mg．利用改性牡蛎壳材料处理含Fe3＋离子废水,具有去除效果较好,操作简单等优点,以废治废,具有双重利用价值．  相似文献   

Can AI communication tools increase legislative responsiveness and trust in democratic institutions?     

《Government Information Quarterly》2023,40(3):101829

Smart replies, writing enhancements, and virtual assistants powered by artificial intelligence (AI) language technologies are becoming part of consumer products and everyday experiences. This study explores the opportunities and risks of using language-generating AI systems in politics to increase legislative responsiveness. Legislators receive a large volume of constituent communication and often cannot devote individual consideration and timely response to each. Here, AI language technologies may allow legislators to process constituent communication more efficiently. For example, AI writing tools can suggest reply snippets when a staffer responds to a common concern. However, legislative human-AI collaboration could reduce constituent trust or undermine the representative process. In two experiments, we compared constituents' impressions of human-written legislative correspondence to correspondences partially or fully generated by GPT-3, a state-of-the-art language model. Our results suggest that legislative correspondence generated by AI with human oversight may be received favorably and increase constituent trust compared to generic auto-responses that busy legislators may employ. However, poorly performing AI language technologies may damage confidence in the legislator. Our findings highlight the potential and risks of introducing AI-mediated communication to the representation process. We discuss the importance of disclosure, transparency, and maintaining human-in-the-loop accountability for political deployments of AI language technologies.  相似文献   

论互联网企业竞争战略选择的误区——以3Q大战为例     

包海兰 《辽宁科技学院学报》2011,13(2):52-54

近日,腾讯QQ与奇虎360为了各自的利益,展开了前所未有的互联网战——＂3Q大战＂,这场大战不仅损害了广大网络用户的利益,竞争双方也是损失惨重。这一案例反映出我国互联网企业竞争战略管理的诸多问题,本文将通过对＂3Q大战＂的案例分析,探讨当前中国互联网企业应如何开展行之有效的竞争战略管理,从而为转型时期中国互联网企业的管理者提供一些理论指导及实践启示。  相似文献   

(C_6H_6ClNO_3S)_2(H_2O)_2的合成和晶体结构     

王哗  马宁 《洛阳师范学院学报》2011,30(5):56-58

合成了一种新的化合物(C6H6C lNO3S)2(H2O)2,测定了其结构.晶体数据表明该配合物属三斜晶系,P-1空间群,晶胞参数为:a=5.8626(8),b=11.7993(17),c=12.7680(18),α=88.286(2)°,β=87.534(2)°,γ=84.121(2)°,V=877.5(2)3,Z=2,Dc=1.708 mg/m3,Rgt(F)=0.0418,wR2(F2)=0.0974,F(000)=464,数据完整度为99.3%,标题化合物含有3种氢键,形成一种三维网状的稳定结构.  相似文献   

浅析我国高职陶瓷艺术设计专业的人才培养模式     

饶媛媛  程卫桃 《南昌教育学院学报》2011,(11):89-90

陶瓷艺术设计教育,是以陶瓷为媒介和一定的学术侧重而展开的教育活动。对高职陶瓷艺术设计教育而言,在继承陶瓷艺术悠久的历史文化传统的基础上,运用"3+3"人才培养模式,为社会培养出应用型高素质技能人才,是我国当前高职教育发展的必然趋势。  相似文献