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光学瞄准镜机械设计过程中如何有效增加弹道和风偏调节范围
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作者 凌付平 《科技资讯》 2018年第13期85-86,共2页
光学瞄准镜在射击使用过程中,需要根据射击目标的距离、子弹的自重、射击环境的风向调节瞄准镜的分化刻度中心与目标弹着点的重合度,由于机械设计的限制,现有光学瞄准镜的弹道和风偏调节范围通常在30MOA左右,不能满足现有射击使用者的... 光学瞄准镜在射击使用过程中,需要根据射击目标的距离、子弹的自重、射击环境的风向调节瞄准镜的分化刻度中心与目标弹着点的重合度,由于机械设计的限制,现有光学瞄准镜的弹道和风偏调节范围通常在30MOA左右,不能满足现有射击使用者的需求。本文从机械设计的角度出发,在不改变瞄准镜光路结构的情况下,通过更改正像镜管组的摆动结构、复位结构,以及改变正像镜管组合与瞄准镜管配合尺寸三个方面进行优化设计,有效提升了光学瞄准镜的弹道和风偏调节范围。 展开更多
关键词 光学瞄准镜 机械设计 弹道调节 风偏调节 范围
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Noncompliance Opportunities and Tax Compliance Behavior in Nigeria: The Moderating Effect of Taxpayers' Financial Condition and Risk Preference
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作者 James O. Alabede Zaimah Bt. Zainol Ariffin Kamil Md Idris 《Journal of Modern Accounting and Auditing》 2012年第4期445-460,共16页
In Nigeria, like some other developing countries, income tax administration is characterized by noncompliance problem and this has been hindering tax revenue performance. Although a number of factors may be responsibl... In Nigeria, like some other developing countries, income tax administration is characterized by noncompliance problem and this has been hindering tax revenue performance. Although a number of factors may be responsible for such phenomenon, the literature has suggested that the relationship between tax compliance behavior and its determinants may be moderated by other factors. In order to account for situational and environmental peculiarity of Nigeria, this study extends tax compliance model to incorporate moderating effects of taxpayers' financial condition and risk preference. However, the study investigates the moderating effects of financial condition and risk preference on the relationship between noncompliance opportunity and tax compliance behavior. The study was conducted through a survey of individual taxpayers' opinions and the data collected were statistically treated using multiple regression technique. The study reveals among others that the effects of financial condition and risk preference significantly moderated the influences of taxpayers' source of income and occupation on tax compliance behavior. These findings pose some theoretical and policy implications. 展开更多
关键词 noncompliance opportunity tax compliance behavior individual income tax
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