Small Changes,Big Impact: Tungsten Bronzes with Extremely Large Second Harmonic Generation Achieved by the Transition Metal Doping on the B-Site

Two novel transition metal-doped tungsten bronze oxides, Pb_2.15Li_0.85Nb_4.85Ti_0.15O₁₅ (PLNT) and Pb_2.15Li_0.55Nb_4.85W_0.15O₁₅ (PLNW), are synthesized by high-temperature solid-state reactions. The Rietveld method using the high-resolution synchrotron radiation indicates that PLNT and PLNW crystallize in the orthorhombic polar noncentrosymmetric space group, Pmn2₁ (no. 31). As a class of tungsten bronze oxide, PLNT and PLNW retain a unique rigid framework composed of d⁰ transition metal cation (Ti⁴⁺ or W⁶⁺)-doped highly distorted NbO₆ octahedra along with the subsequently generated Pb/LiO₁₂ and PbO₁₅ polyhedra. Interestingly, the d⁰ transition metal-doped tungsten bronzes, PLNT and PLNW, exhibit extremely large second-harmonic generation (SHG) responses of 56 and 67 × KH₂PO₄, respectively. The observed immeasurably strong SHG is mainly attributed to a net polarization originating from the alignment of highly distorted NbO₆ octahedra with doped transition metals in the frameworks. It is believed that doping transition metal cations at the B-site of the tungsten bronze structures should be an innovative strategy to develop novel high-performance nonlinear optical materials.     

利用地面公网实现战术数据链远程通信研究

利用地面公共网络使地理位置远离的多个数据链系统无缝互连,可以支持和提高相对独立的多个战术数据信息链实现超视距的互操作测试和训练。文章分析了两种地面网络通信模式：虚拟专用局域网业务模式和应用层网关模式。比较两种模式应用特点,发现虚拟专用局域网业务模式可以将多个数据链网络连接成一个虚拟局域网,传输数据方便,但是应用层网关更加适合数据链接口的要求并且可以对传输数据进行处理和报文格式修改。     

网络的实际应用

太钢加工厂液压剪车间扩建工程采用网络计划技术进行施工管理，使建设工期缩短、整体造价降低、施工质量提高，全面地取得了显著的效果。     

新型III-V族变形微盘硅基混合激光器

文章中,我们设计了一种连接一个Si的输出波导的新型III-V族变形微盘硅基混合激光器,并通过BCB键合技术以及标准光刻将其制备。相比于传统圆形微盘激光器,该激光器实现了激光从硅波导的定向发射以及单纵模输出。实验上,在连续电流操作下,我们获得了0.31 mW的输出功率以及27 dB的边模抑制比。     

Mebendazole-Induced Blood-Testis Barrier Injury in Mice Testes by Disrupting Microtubules in Addition to Triggering Programmed Cell Death

Mebendazole (MBZ) is a synthetic benzimidazole known for its antiparasitic properties. In recent years, growing evidence showed that MBZ was also used as an anti-tumor agent. However, whether (and to what extent) this drug treatment affected the male reproductive system was not well-understood. In this study, male C57BL/6 mice were injected with 40 mg/kg/day of MBZ. The treatment was for 3 and 7 days. Our results showed that the injected mice exhibited an abnormal spermatogenic phase with a significant decrease in sperm. We further detected microtubule disruption and transient functional destruction of the blood–testes barrier (BTB) in the MBZ-injected mice testes (BTB). Our data confirmed that MBZ suppressed the expression of the BTB junction-associated proteins and disrupted the Sertoli cells’ function in vivo. Moreover, MBZ-treated mice demonstrated an aberrant caspase-3 signalling pathway, which resulted in the apoptosis of the germ cells. Here, we present our data, indicating that MBZ impairs BTB by reducing the expression of the microtubules’ and BTB junction-associated proteins. The last leads to activating the caspase-3 pathway, which triggers extensive germ cell apoptosis.     

受限视觉下RoboCup3D中机器人的定位

针对RoboCup3D中机器人视觉模型的重大改变,即由原来的完美视觉模型变为受限视觉模型,在综合完美视觉下机器人的定位方法,即陀螺仪定位、1个标志杆定位,3个标志杆定位,提出一种受限视觉下机器人自身定位策略,并应用卡尔曼滤波器来提高定位的精度,在Rcssserver3D仿真环境中进行了定位数据的采样和对比,实验表明此定位方法具有很好的竞赛适应性与健壮性。     

Structure optimization of a uni-traveling-carrier photodiode with introduction of a hydro-dynamic model

Characteristies of a uni-traveling-carrier photodiode(UTC-PD)are investigated.A hydro-dynamic model is introduced which takes into account the electrons'velocity overshoot in the depletion region.which is a more accurate high speed device than using the nodal drift-diffuse model.Based on previOUS results,two modified UTC-PDs are presented,and an optimized device is obtained,the bandwidth of which is more than twice that of the original.     

Settling state detection of SBR based on DO profile analysis using dynamic time warping

Settleability of activated sludge is one of the most important variables for stable solid-liquid separation of the biological wastewater process. Moreover, effective decanting is a sensitive work at sequencing batch reactor (SBR) which has a settleability fault, such as filamentous/non-filamentous bulking, deflocculation and sludge rising. It is not easy to monitor sludge settleability directly without any specified measurement system, but the values of settling phase can be measured by installing basic measuring instruments for monitoring the process in the reaction stage of SBR. In this study, patterns of DO profiles measured at settling phase showing significant difference according to the process status were used to explore whether a problem occurs or not. To use this information, an online algorithm was developed to detect and diagnose the settling fault. A dynamic programming method that is one of the pattern recognition methods was used to detect and classify the patterns of the DO profiles. Based on the discriminant function made by dynamic time warping results and an extracted variable from DO profiles, the classification rules were generated. With the discriminant function, the settleability fault was detected and classified successfully.     

钼酸铜氢还原制超细Mo—Cu粉末

超细粉末是正在发展中的一种新型材料。本研究采用钼酸铜氢还原方法，获得了Mo－Cu复会超细粉末。     

堆肥发酵剂对发酵猪粪微生物群落组成影响

[目的]研究堆肥发酵剂对猪粪发酵的影响.[方法]以猪粪、锯木灰和堆肥发酵剂为原材料进行好氧堆肥,测定堆肥过程中的温度变化,分别以ITS1F_ITS2R和338F_806R作为真菌和细菌引物测定微生物丰富度和多样性.[结果]堆肥发酵剂能促进猪粪的堆肥发酵升温,增加微生物群落的丰富度和多样性并改变其优势种.[结论]对照组的...