摘要：The direct hydrogenation of CO2 using H2 gas is a one-stone-two-birds route to produce highly valueadded hydrocarbon compounds and to lower the CO2 level in the ***,the transformation of CO2 and H2 into hydrocarbons has always been a great challenge while ensuring both the activity and selectivity over abundant-element-based *** this work,we designed a Schottky heterojunction composed of electron-rich MoC nanoparticles embedded inside an optimized nitrogen-doped carbon support(MoC@NC)as the first example of noble-metal-free heterogeneous catalysts to boost the activity of and specific selectivity for CO2 hydrogenation to formic acid(FA)in liquid phase under mild conditions(2 MPa pressure and 70℃).The MoC@NC catalyst with a high turnover frequency(TOF)of 8.20 molFA molMoC^-1 h^-1 at 140℃ and an excellent reusability are more favorable for real applications.

摘要：基于TMS320F2812设计的全数字舵机用伺服系统采用电流内环、速度外环、位置最外环的三闭环控制结构。设计了带有电压泵升电路的主功率电路以及功率管驱动电路,软件采用C语言模块化编程。对速度计算的改进提高了速度的计算精度和抗干扰能力。试验结果表明,分析正确,设计合理。

摘要：电动执行器是自动化系统中大量使用的一种执行部件.随着信息技术和自动化技术的发展,对电动执行机构的性能要求不断提高,要求电动执行机构的更高的控制精度以及具有网络通信功能.本文针对电动执行器的控制难点介绍了一种具有PROFIBUS-DP现场总线从站接口智能电动执行器的结构原理和软硬件设计,提出了一种基于模糊专家规则的智能控制算法,应用于电动执行机构的控制.实验表明本装置设计方案的有效.

摘要：【目的】为提高烟叶分级的自动化和智能化水平,研究粘连烟叶的离散化方法。【方法】设计粘连烟叶离散化方法和装置,通过烟叶自身翻滚、碰撞和弯曲剪切破坏烟叶间粘附状态,按照1000 kg/h生产能力对粘连烟叶的离散化效果进行测试。【结果】设备单片离散化率超过96%,烟叶造碎率小于1%,该装置对粘连烟叶具有良好的离散化效果,可为烟叶智能分级提供离散的烟叶物料条件。

摘要：Rice blast and bacterial blight are important diseases of rice(Oryza sativa)caused by the fungus Magnaporthe oryzae and the bacterium Xanthomonas oryzae ***(Xoo),*** rice varieties for broadspectrum resistance is considered the most effective and sustainable approach to controlling both *** dominant resistance genes have been extensively used in rice breeding and production,generating diseaseresistant varieties by altering susceptibility(S)genes that facilitate pathogen compatibility remains ***,using CRISPR/Cas9 technology,we generated loss-of-function mutants of the S genes Pi21 and Bsr-d1 and showed that they had increased resistance to *** also generated a knockout mutant of the S gene Xa5 that showed increased resistance to ***,a triple mutant of all three S genes had significantly enhanced resistance to both *** and ***,the triple mutant was comparable to the wild type in regard to key agronomic traits,including plant height,effective panicle number per plant,grain number per panicle,seed setting rate,and thousand-grain *** results demonstrate that the simultaneous editing of multiple S genes is a powerful strategy for generating new rice varieties with broadspectrum resistance.

摘要：The stability and reactivity of nanomaterials are of crucial importance for their application, but the long-term effects of stability and reactivity of nanomaterials under practical conditions are still not well understood. In this study, we first established a comprehensive strategy to investigate the stability of a highly reactive nanomaterial from the viewpoint of reaction kinetics with ultrathin tellurium nanowires （TeNWs） as a model material in aqueous solution through an accelerated oxidation process. This allowed us to propose a new approach for the design and synthesis of other unique one-dimensional nanostructures by a chemical transformation process using the intermediate nanostructures ＂captured＂ during the dynamic oxidation process under different conditions. In essence, the oxidation of ultrathin TeNWs is a gas-solid reaction which involves liquid, gas and solid phases. It has been demonstrated that the oxidation process of ultrathin TeNWs in aqueous solution can be divided into three stages, namely oxygen limiting, ultrathin TeNWs limiting and mass transfer resistance limiting stages. The apparent oxidation kinetics for ultrathin TeNWs is approximately in accord with a first order reaction kinetics model and has an apparent activation energy as low as TeNWs are thermodynamically unstable 13.53 ***^-1, indicating that ultrathin However, the unstable nature of ultrathin TeNWs is actually an advantage since it can act as an excellent platform to help us synthesize and design one-dimensional functional nanomaterials--with special structures and distinctive properties--which are difficult to obtain by a direct synthesis method.

摘要：目的 分析改良鼻翼缩小术的临床疗效.方法 对鼻翼基底部肥厚患者采取改良鼻翼缩小术治疗.将切口延伸到鼻孔前庭,使切除后的鼻翼组织结构整体向内部推移,设计三角减张皮瓣使切口内外侧缘无张力愈合,以减小瘢痕,使鼻外形立体圆润.结果 本组共30例患者均顺利完成手术,术后随访7 ～11个月,瘢痕不明显,疗效显著.结论 改良鼻翼缩小术治疗鼻翼肥大,操作简便,疗效显著,美容效果良好,值得临床推广应用.

摘要：We present an example of applying'need-driven'product design principle to the development of a rapid test kit to detect SARS-COV-2(COVID-19).The tests are intended for use in the field and,longer term,for home *** detect whether a subject is currently infected with the virus and is *** urgent need for large numbers of tests in field setting imposes constraints such as short test time and lack of access to specialist equipment,laboratories and skilled technicians to perform the test and interpret *** meet these needs,an antigen test based on RT-LAMP with colorimetric readout was *** use of swab sample with no RNA extraction was *** extensive experimental study(reported elsewhere),a rapid test kit has been fabricated to satisfy all design criteria.

摘要：目的基于人工智能的图像生成技术,特别是AI画作生成技术,将其应用于个性化文化创意产品的设计。方法以八破图艺术风格为例,研究个性化的AI画作生成算法,挖掘AI画作与文化创意产品载体的结合点,实现个性化文创产品设计。首先,构建八破图图像库,研究八破图艺术风格的量化描述,提取构图、拼接边缘特征等人工特征和基于VGG卷积神经网络的高层语义特征。然后,提出八破图艺术风格的图像拼接算法。最后,基于所生成的图像设计文化创意产品,实现基于纸工程的"集珍博物馆"立体书设计。结果个性化AI画作与文化创意产品载体之间自然结合点的挖掘,为文化创意产品设计提供了新的思路。结论研究结果表明了人工智能技术,例如AI图像生成,应用于个性化文化创意产品设计的可行性和有效性,进一步为设计学与计算机科学的交叉提供了有效方法。

摘要：心肌肥厚(hypertrophiccardiomyopathy,HCM)主要病理表现为心肌细胞体积增大等,是心力衰竭发生的重要原因之一,易导致心律失常和猝死[1],由于HCM病因和发病机制的复杂性,目前并没有有效的防治方法。异丙肾上腺素(isoprenaline,ISO)是一种β肾上腺素受体激动剂,已成为大鼠心肌肥厚动物模型造模的常用方案之一。但目前ISO注射剂量和注射时间并不统一差异较大,并未明确一个可重复、固定的造模方法。因此,建立一个可靠的ISO药物注射HCM模型,探究ISO造模心肌肥厚更加有效的注射剂量,选取1、3和5 mg·kg^(-1) ISO剂量,探究大鼠心肌肥厚模型的建立方法。