摘要：Lithium(Li) metal is widely considered as a promising anode for next-generation lithium metal batteries(LMBs) due to its high theoretical capacity and lowest electrochemical potential. However, the uncontrollable formation of Li dendrites has prevented its practical application. Herein, we propose a kind of multifunctional electrolyte additives(potassium perfluorinated sulfonates) from the multi-factor principle for electrolyte additive molecular design(EDMD) view to suppress the Li dendrite growth. The effects of these additives are revealed through experimental results, molecular dynamics simulations and firstprinciples calculations. Firstly, K^(+)can form an electrostatic shield on the surface of Li anode to prevent the growth of Li dendrites. Secondly, potassium perfluorinated sulfonates can improve the activity of electrolytes as co-conductive salts, and lower the electro-potential of Li nucleation. Thirdly, perfluorinated sulfonate anions not only can change the Li^(+)solvation sheath structure to decrease the desolvation energy barrier and increase the ion migration rate, but also can be partly decomposed to form the superior solid electrolyte interphase(SEI). Benefited from the synergistic effects, an outstanding cycle life over250 h at 1 m A cm^(-2) is achieved in symmetric Li||Li cells. In particular, potassium perfluorinated sulfonate additives(e.g., potassium perfluorohexyl sulfonate, denoted as K+PFHS) can also contribute to the formation of high-quality cathode electrolyte interphase(CEI). As a result, Li||LiNi_(0.6)Mn_(0.2)Co_(0.2)O_(2) full cells exhibit significantly enhanced cycling stability. This multi-factor principle for EDMD offers a unique insight on understanding the electrochemical behavior of ion-type electrolyte additives on both the Li metal anode and high-voltage cathode.

摘要：根据液氯钢瓶防震胶圈的结构特性和拆装要求,设计了一种基于机械传动和自动控制的胶圈拆装机。该设备采用PLC进行自动控制,提高了拆装效率和安全性。

摘要：该文设计一种改进型耦合动态整数帐篷映射模型,引入Rabbit流密码中的计数器机制。针对整数帐篷映射的短周期现象,从扩展精度、动态扰动和扩展维度三个角度,对四种不同的整数帐篷映射模型生成的混沌序列进行周期性分析,证明了改进型模型能够较大地改善整数帐篷映射的短周期现象。针对该模型的相关性、初值敏感性、离散Lyapunov指数、NIST随机性等混沌特性进行仿真分析,结果表明该模型性能优越,具有极高的密码学应用价值。

摘要：Orthogonal Frequency Division Multiplexing(OFDM) is an effective technique to deal with a frequency selective channel since it can convert the channel into some flat fading ***,very different output SNR values of the subchannels will lead to poor bit error performance when a linear equalizer and Equal Bit Allocation(EBA) are adopted in OFDM ***,we proposed three novel nonlinear Joint Transceiver(JT) schemes based on Zero-Forcing(ZF) criterion and Minimum Mean Square Error(MMSE) criterion respectively,which can transform all subchannels of an OFDM system into subchannels with identical channel ***,EBA is equivalent to the Optimum Bit Allocation(OBA) for these *** analysis helps us to obtain the theoretical approximate BER values of the JT *** results verify the numerical analysis and confirm that the performance of our proposed JT scheme greatly outperforms the traditional linear equalizer with EBA at moderate and high SNR values.

摘要：针对镍钼矿中氧化钼浮选回收率低,丢弃造成资源浪费和环境污染等问题,在工艺矿物学研究基础上,对镍钼矿中硫化矿物浮选尾矿进行开路实验和闭路实验,设计出氧化钼浮选流程,并利用分子动力学模拟研究捕收剂分子在矿物解离面的吸附过程。研究结果表明:镍钼矿中硫化矿物浮选尾矿主要含钼矿物为氧化钼,脉石矿物主要为磷灰石和黄铁矿;通过闭路浮选试验得到Mo品位为3.37%,Ni品位为3.75%,Mo回收率为71.22%,Ni回收率达67.81%的精矿;捕收剂CSU-M分子在氧化钼(100)面吸附比磷灰石(010)面和黄铁矿(110)面吸附强,从而实现浮选过程中氧化钼与磷灰石和黄铁矿的分离。

摘要：采用二次支撑面法(SQM)设计了一种均匀方斑透镜,建立了Zernike正交多项式曲面插值重构算法。在初始基面上对每一个子面选择映射守恒点,并按照相邻关系划分9点系统。针对9点系统,利用多项式的低阶项建立了线性方程组,并根据其唯一解构造了部分曲面。将所有部分曲面拼接,得到了完整的连续光滑的优化曲面。该算法可在一定程度上简化SQM初始基面的后期优化,得到良好的均匀方斑透镜设计效果。

摘要：中国的文字，不但是传递信息的工具，而且成为表达情感的载体。自从方块汉字的产生和毛笔的使用以后，汉字的书写就与中国画同步，产生了艺术欣赏价值。它经历了从象形文、甲骨文、钟鼎文、金文以及篆、隶、楷、行、草等各种书体的演变，而且名家辈出，流派纷呈。这类书写的汉字也就称之为“书法艺术”。

摘要：20世纪20-30年代,丰子恺先生发表和出版了一系列介绍西方音乐家及西洋音乐作品的文章和著作,开启了国人了解与接受西方音乐的先河,对我国社会“西乐东渐”起到了积极的推动作用。客观公正地审视丰子恺的西洋音乐理论贡献,没有必要非得将其上升到划时代原创成果的高度上去,从西乐东渐和中西音乐文化交流的角度考察,丰子恺先生对我国社会西方音乐知识与西洋音乐作品的传播和接受做出了不可磨灭的贡献。

摘要：目的 设计HIV-1 gp140蛋白疫苗并进行免疫原性初步研究.方法 构建包含不同信号肽的gp140蛋白表达克隆,对表达效率和信号肽切割效率进行比较筛选,同时对不同长度C末端的gp140进行比较,最终获得优化的HIV-1 gp140免疫原.采用不同的免疫方式免疫豚鼠,通过特异性结合抗体检测和中和抗体检测进行免疫效果评价.结果 设计的信号肽具有较好的分泌、切割效率,重组HIV-1 gp140抗原获得良好的表达.重组蛋白疫苗单独免疫就能诱导很强的结合抗体和中和抗体反应,反应强度高于重组DNA疫苗以及痘苗病毒载体疫苗的联合免疫.不同C末端长度的gp140蛋白免疫效果没有显著的差异,但长C末端的gp140蛋白免疫效果稍好.结论 优化设计了HIV-1 gp140蛋白疫苗,设计的重组疫苗获得较好的免疫效果.

摘要：随着便携式电子设备、电动汽车、智能电网等领域的快速发展,市场对于高能量密度储能器件的需要日益增长.以石墨为负极的传统锂离子电池能量密度有限,尤其是与电动汽车动力电池的发展目标(300~500 Wh kg-1)尚有较大差距.因此,研究开发新一代电池技术十分迫切[1].