The dual role of multiple-transistor charge sharing collection in single-event transients

As technologies scale down in size, multiple-transistors being affected by a single ion has become a universal phenomenon, and some new effects are present in single event transients (SETs) due to the charge sharing collection of the adjacent multiple-transistors. In this paper, not only the off-state p-channel metal-oxide semiconductor field-effect transistor (PMOS FET), but also the on-state PMOS is struck by a heavy-ion in the two-transistor inverter chain, due to the charge sharing collection and the electrical interaction. The SET induced by striking the off-state PMOS is efficiently mitigated by the pulse quenching effect, but the SET induced by striking the on-state PMOS becomes dominant. It is indicated in this study that in the advanced technologies, the SET will no longer just be induced by an ion striking the off-state transistor, and the SET sensitive region will no longer just surround the off-state transistor either, as it is in the older technologies. We also discuss this issue in a three-transistor inverter in depth, and the study illustrates that the three-transistor inverter is still a better replacement for spaceborne integrated circuit design in advanced technologies.     

Γ函数乘积公式的一个新证明

Γ函数的乘积公式的证明方法有多种.例如,依据Γ函数对数微商的表达式     

远离平衡问题及其描述的理论和方法概述

本文简要阐述了耗散结构、混沌、外场驱动下的耗散系统非线性动力学等远离平衡和非线性问题,及描述这些问题的各种宏观、半宏观及非平衡统计物理的理论和方法。     

杂多配合物催化合成羧酸异戊酯的研究

杂多配合物催化合成羧酸异戊酯的研究王玉和，周百斌，关良智，王晓光，单永奎，李萍，周宏立（哈尔滨师范大学化学系哈尔滨１５００８０）关键词杂多酸，酯化作用，异戊酯，催化羧酸异戊酯广泛用于调制各种香型的食品香料，用作溶剂、萃取剂、制革、人造丝、涂料、化妆品...     

氧化铝柱上的Beckmann重排反应——一个新的异︽唑啉环合付产物

By using Beckmann rearrangement on alumina to prepare 7α-acetylamino-6, 14-endo-etheno-tetrabydrothebaine (2a) and its N-allyl analogue (2b) from the corrssponding ketoxime tosylates (1a and 1b), we obtained novel isoxazoline by-products (3a and 3b). Their structures were determined by IR, ^1H NMR, MS and elemental analyses. The mechanism of this side reaction was beiefly discussed.     

六(甲氧基甲基)三聚氰胺/多元醇/二甲基丙烯酸酯的混合体系的聚合

六(甲氧基甲基)三聚氰胺(HMMM)-二缩三乙二醇(T_3EG)和二缩三乙二醇二甲基丙烯酸酯(T_3EGMA)的混合体系加入潜酸催化剂后,在较高温度下可同时进行缩聚和自由基聚合并表现出协同效应.在这一混合聚合体系中HM-MM不仅是交联剂,而且是体系中活泼亚甲基氧化为过氧化氢物的催化剂,由潜酸催化剂分解出的酸是缩聚的催化剂,也是过氧化氢物分解为自由基的催化剂,生成的自由基可引发T_3EGMA聚合.有关凝胶时间实验,吸氧实验和活性氧测定的结果支持上述论断.     

6-甲氧基-1,2,3,9-四氢-4H-咔唑-4-酮肟的一锅合成

报道了6-甲氧幕-1,2,3,9-四氢-4H-咔唑-4-酮肟(3b)的一锅合成法,将Fischer吲哚合成与肟化两步反应并为一步,可简化操作,提高收率.反应可以在弱碱性且温度温和的条件下一锅合成,是由于肟化使Fischer吲哚环合变得容易,羰基与肟基在互变异构方向上的差别是影响环合反应的关键因素.     

无柄新乌檀中一个新的三萜成分的分离和鉴定

对无柄新乌檀进行了持续的化学成分及药理作用的研究, 在对其枝干的进一步研究中, 又分离得到一个新的三萜化合物3,7,21,23-四羟基齐墩果烷-12-烯-28-酸. 本文报道其分离方法和结构鉴定结果.     

镧系元素钨钒杂多配合物的合成与表征

报道了镧系元素钨钒杂多配合物的合成方法。元素分析和热重分析确定其通式为：Ｋ７Ｈ６「Ｌｎ（ＶＷ１０ＶＯ３９）２」．ｘＨ２Ｏ（Ｌｎ＝Ｌａ＾３＋、Ｃｅ＾３＋、Ｐｒ＾３＋、Ｎｄ＾３＋、Ｓｍ＾３＋、Ｅｕ＾３＋、Ｇｄ＾３＋、ｄＹ＾３＋、Ｙｂ＾３＋）。利用红外，喇曼，电子自旋共振，紫外和Ｘ射线衍射谱对其进行了表征。配合物的热解性质研究表明，其分解温度范围为４００－４５０℃，还研究了的氧化还原性质。