闪存S29AL016D在数据处理系统中的应用

S29AL016D是Spansion司生产的16Mbit闪存芯片．该芯片的擦写次数可达百万次以上，且容量大速度快、功耗低。介绍了S29AL016D并行Flash存储器的特点，给出了S29AL016D器件的几种操作方式。     

Superconducting Busline Design for HT—7U Tokamak

Superconducting (SC) tokamak HT-7U has seven pairs of buslines connecting toroidal/Poloidal coils and the current leads,These SC buslines(SCBLs) share a common cryostat and are made of the calbe in conduit conductors(CICCs) arranged as a decoupling configuration.In order to reduce the heat loads conducted from the seven current leads with a capacity of 15kA during the magnets cooldown.the buslines with a much lower thermal conduction were employed in comparison with the current leads,and a special cooling loop was designed.     

A Calculation of Steady Pressure Drop and an Analysis of HT—7U CICC

Under the condition of steady,the pressure drop of coolant is mainly caused by friction along the cable.in the CICC(cable-in-conduit-conductor).helium flow within the conductor consists of two parallel interconnected tubes.The velocity distribution has some differece between the central channel and conductor space.The region of Reynolds number is from 10^3 to 10^6.This paper describes the calculation of pressure drop of HT-7U CICC at various mass flows.It is assumed that the coolant flows in two parallel,rough tudes during the caclulation.     

Targeting PSEN1 by lnc-CYP3A43-2/miR-29b-2-5p to Reduce β Amyloid Plaque Formation and Improve Cognition Function

Presenilin-1 (PSEN1) is a crucial subunit within the γ-secretase complex and regulates β-amyloid (Aβ) production. Accumulated evidence indicates that n-butylidenephthalide (BP) acts effectively to reduce Aβ levels in neuronal cells that are derived from trisomy 21 (Ts21) induced pluripotent stem cells (iPSCs). However, the mechanism underlying this effect remains unclear. This article aims to investigate the possible mechanisms through which BP ameliorates the development of Alzheimer’s disease (AD) and verify the effectiveness of BP through animal experiments. Results from RNA microarray analysis showed that BP treatment in Ts21 iPSC-derived neuronal cells reduced long noncoding RNA (lncRNA) CYP3A43-2 levels and increased microRNA (miR)-29b-2-5p levels. Bioinformatics tool prediction analysis, biotin-labeled miR-29b-2-5p pull-down assay, and dual-luciferase reporter assay confirmed a direct negative regulatory effect for miRNA29b-2-5p on lnc-RNA-CYP3A43-2 and PSEN1. Moreover, BP administration improved short-term memory and significantly reduced Aβ accumulation in the hippocampus and cortex of 3xTg-AD mice but failed in miR-29b-2-5p mutant mice generated by CRISP/Cas9 technology. In addition, analysis of brain samples from patients with AD showed a decrease in microRNA-29b-2-5p expression in the frontal cortex region. Our results provide evidence that the LncCYP3A43-2/miR29-2-5p/PSEN1 network might be involved in the molecular mechanisms underlying BP-induced Aβ reduction.     

用高分辨固体核磁共振谱模拟程序测定Y型分子筛的骨架硅铝比

用高分辨固体ＭＡＳ＾２９Ｓｉ－ＮＭＲ法测定Ｙ型分子筛的骨架硅铝比，直接可靠，优于依靠经验公式的Ｘ射线衍射法和红外光谱法，但谱峰重叠，严重妨碍实际应用。用固体核磁共振谱模拟程序处理分子筛的ＭＡＳ＾２９Ｓｉ－ＮＭＲ谱，不受谱峰重叠的限制。     

Electric current from the direct conversion of low molecular weight C,H,O-compounds

This paper gives a report on the results obtained in the development of formate/air fuel cells, and of formate/air, glycol/air and formic acid/air rechA current density of 50 mA cm^?2 can be drawn continuously from formate/air fuel cells using alkaline electrolyte. Corresponding formate/air rechaBy replacement of the formate fuel by ethylene glycol an energy density of 101 Wh kg^?1 (single duty cycle) is obtained, and the cost decreases toA considerable number of these elements has already been built and tested; the shift to a small series production appears to be possible immediately. A     

基于VxWorks的文件系统的研究与实现

详细介绍TrueFFS的结构．以AM29LV160BT为例,在Flash上建立文件系统。利用VxWorks下的文件系统TrueFFS实现对Flash上数据的管理和Vxworks映像的加栽,系统中的FTP服务器也方便系统的远程升级和维护,对嵌入式的在线程序升级有着重要价值。所实现的系统稳定性好,可靠性高,满足设计要求。