超薄型金属氧化物／搪瓷复合辐射涂层蓄电池加热装置

为了解决战斗车辆在冬季使用中由于气温太低而造成蓄电池输出容量下降和充电困难问题,我们研制了一种超薄型红外线加温装置。该装置采用金属氧化物搪瓷复合涂料作为辐射层,具有发射率高、电一热转换效率高、抗腐蚀、不易脱落等特点。该加热装置体积小,重量轻,坚固实用,经3个冬季实车试验,效果令人满意。     

固体火箭发动机可靠性增长试验规划初步研究

研究了固体火箭发动机产品总数一定情况下可靠性增长试验量的确定问题．提出了模型假设，以剩余产品成功数期望值最大作为目标函数，建立数学模型；然后，在初始故障数服从泊松分布时，推导了确定可靠性增长试验量的极大一极小准则，给出了产品研制后期故障数的替代分布．最后给出了一个应用实例，结果表明该准则有点保守，但较为稳健．     

S Zorb装置长周期运行问题分析及应对措施

中国石油化工股份有限公司镇海炼化分公司两套S Zorb装置在运行过程中出现了再生器旋风分离器料腿堵塞、闭锁料斗过滤器泄漏、吸附剂提升管线磨穿泄漏、再生空气干燥器瓷球粉化等问题,影响了装置的长周期运行,影响了产品质量。分析这些问题产生的原因,采取了相应的措施:(1)再生器投用前确保旋风分离器一级和二级料腿没有明水,再生器烘器时间尽可能长,严格控制再生烟气氧体积分数不超过0.2%;(2)对闭锁料斗过滤器管板和滤芯连接方式进行改进升级,严格控制闭锁料斗料位不超过80%;(3)对吸附剂提升管线加强定点测厚工作,控制氮气提升量和吸附剂下料速度,升级管线材质;(4)严格管理,严格按照方案执行装置操作和作业,做实日常巡检工作,以及早发现问题并及时妥善处理。     

Targeted Synergy between Adjacent Co Atoms on Graphene Oxide as an Efficient New Electrocatalyst for Li–CO2 Batteries

Li–CO₂ batteries are an attractive technology for converting CO₂ into energy. However, the decomposition of insulating Li₂CO₃ on the cathode during discharge is a barrier to practical application. Here, it is demonstrated that a high loading of single Co atoms (≈5.3%) anchored on graphene oxide (adjacent Co/GO) acts as an efficient and durable electrocatalyst for Li–CO₂ batteries. This targeted dispersion of atomic Co provides catalytically adjacent active sites to decompose Li₂CO₃. The adjacent Co/GO exhibits a highly significant sustained discharge capacity of 17 358 mA h g^?1 at 100 mA g^?1 for >100 cycles. Density functional theory simulations confirm that the adjacent Co electrocatalyst possesses the best performance toward the decomposition of Li₂CO₃ and maintains metallic‐like nature after the adsorption of Li₂CO₃.     

AN H∞ FUZZY TRACKING CONTROL SCHEME FOR AFFINE COUPLED SPATIO-TEMPORAL CHAOS

Due to the interactions among coupled spatio-temporal subsystems and the constant bias term of affine chaos, it is difficult to achieve tracking control for the affine coupled spatiotemporal chaos. However, every subsystem of the affine coupled spatio-temporal chaos can be approximated by a set of fuzzy models; every fuzzy model represents a linearized model of the subsystem corresponding to the operating point of the controlled system. Because the consequent parts of the fuzzy models have a constant bias term, it is very difficult to achieve tracking control for the affine system. Based on these fuzzy models, considering the affine constant bias term, an H∞ fuzzy tracking control scheme is proposed. A linear matrix inequality is employed to represent the feedback controller, and parameters of the controller are achieved by convex optimization techniques. The tracking control for the affine coupled spatio-temporal chaos is achieved, and the stability of the system is also guaranteed. The tracking performances are testified by simulation examples.     

浅谈元器件失效分析在质量问题归零中的作用

本文首先简要介绍了元器件失效分析的目的和作用以及基本实施程序,然后针对我所在质量问题归零过程中存在的集成电路失效原因及机理定位不准确,纠正措施不到位的问题,举例说明了近期在某质量问题归零工作过程中通过委托工信部电子5所进行失效分析,明确了芯片失效原因,进而实现了彻底归零。实践证明,元器件失效分析对于准确定位器件失效原因及机理,从而促进质量问题彻底归零有着关键作用。     

SOI CMOS器件研究

利用0.35μm工艺条件实现了性能优良的小尺寸全耗尽的器件硅绝缘体技术(SOI)互补金属氧化物半导体(FD SOI CMOS)器件,器件制作采用双多晶硅栅工艺、低掺杂浓度源/漏(LDD)结构以及突起的源漏区。这种结构的器件防止漏的击穿,减小短沟道效应(SCE)和漏感应势垒降低效应(DIBL);突起的源漏区增加了源漏区的厚度并减小源漏区的串联电阻,增强了器件的电流驱动能力。设计了101级环形振荡器电路,并对该电路进行测试与分析。根据在3V工作电压下环形振荡器电路的振荡波形图,计算出其单级门延迟时间为45ps,远小于体硅CMOS的单级门延迟时间。     

一种用扫描电镜制作表面纳米结构的方法

提出了一种用扫描电镜制作表面量子点、纳米孔和纳米线阵列的方法,该方法是在数字式扫描电镜的阴极自偏压电路中串联一个可控的负电压发生器,其内阻远小于自偏压电阻;用扫描电镜本身的行扫描时钟信号作为控制信号,经倍频和放大,加到电子枪栅极上控制电子束的通断,使电子束由连续扫描变为规则的点、线扫描,不需用模板即可以"直写"方式在涂有电子束光刻胶(PMMA)的样品上实现点、线曝光,形成周期性量子点、纳米孔和纳米线阵列.     

Rational Designs for Lithium-Sulfur Batteries with Low Electrolyte/Sulfur Ratio

Lithium-sulfur batteries (LSBs) are considered a promising next-generation energy storage device owing to their high theoretical energy density. However, their overall performance is limited by several critical issues such as lithium polysulfide (PS) shuttles, low sulfur utilization, and unstable Li metal anodes. Despite recent huge progress, the electrolyte/sulfur ratio (E/S) used is usually very high (≥20 µL mg⁻¹), which greatly reduces the practical energy density of devices. To push forward LSBs from the lab to the industry, considerable attention is devoted to reducing E/S while ensuring the electrochemical performance. To date, however, few reviews have comprehensively elucidated the possible strategies to achieve that purpose. In this review, recent advances in low E/S cathodes and anodes based on the issues resulting from low E/S and the corresponding solutions are summarized. These will be beneficial for a systematic understanding of the rational design ideas and research trends of low E/S LSBs. In particular, three strategies are proposed for cathodes: preventing PS formation/aggregation to avoid inadequate dissolution, designing multifunctional macroporous networks to address incomplete infiltration, and utilizing an imprison strategy to relieve the adsorption dependence on specific surface area. Finally, the challenges and future prospects for low E/S LSBs are discussed.