雕刻用扫描灰度图生成算法研究

雕刻用灰度图是用灰度阶表示实物高度的特殊灰度图.分析了双CCD三维激光线扫描仪与数控雕刻机集成系统中左右CCD切换所造成的扫描测量误差,基于邻域分析技术对当前测量点的X,Y两个方向上5个相邻的数据点进行平滑处理,其中基于X方向的插补结果对Y方向做再插补,使生成的灰度图符合数控雕刻加工要求.     

政府补贴对制造业企业绩效的影响 ——基于高技术产业和一般制造业中介效用比较研究

现有研究对于政府对制造业补贴能否提高制造业绩效存有争议。通过理论分析认为,研发投入是提高制造业绩效的有效途径,而且相比于一般制造业研发投入对高技术产业的绩效提高效果更为明显。同时研发投入需要大量资金,如果一味增加研发投入,可能挤占其他部门资金。因此,政府补贴能够通过提高企业的研发投入促进企业绩效提升,而且对于高技术产业企业绩效提升的正面影响要大于对一般制造业;并通过A股上市企业的数据进行实证研究,证明以上研究结论。这意味着政府应该对企业进行补贴,而且应该重点补贴高技术产业。     

基于客体特质模式识别的R&D人员绩效竞优评价研究

为适应经济社会和技术环境的快速变化,依据竞优理论,从客体特质模式识别的角度对RD人员的绩效进行分析和评价。首先,基于对RD人员不同绩效价值的认同,从体现RD人员个体优势的角度对其特质进行识别;其次,通过聚类分析的方法对RD人员的个性特质进行共性提炼,得到RD人员特质的不同模式;然后,从兼顾RD人员数量和信息一致性的角度,计算各模式的权重值,从而获得各RD人员的绩效评价值;最后以15名RD人员为例,对所提方法的可行性和有效性进行验证。     

Single lithium-ion channel polymer binder for stabilizing sulfur cathodes

Lithium–sulfur batteries have great potential for high-performance energy-storage devices, yet the severe diffusion of soluble polysulfide to electrolyte greatly limits their practical applications. To address the above issues, herein we design and synthesize a novel polymer binder with single lithium-ion channels allowing fast lithium-ion transport while blocking the shuttle of unnecessary polysulfide anions. In situ UV–vis spectroscopy measurements reveal that the prepared polymer binder has effective immobilization to polysulfide intermediates. As expected, the resultant sulfur cathode achieves an excellent specific capacity of 1310 mAh g⁻¹ at 0.2 C, high Coulombic efficiency of 99.5% at 0.5 C after 100 cycles and stable cycling performance for 300 cycles at 1 C (1 C = 1675 mA g⁻¹). This study reports a new avenue to assemble a polymer binder with a single lithium-ion channel for solving the serious problem of energy attenuation of lithium–sulfur batteries.     

Sustainable career development for R&D professionals: Applying a career development system in Basque country

The goal of this study is to measure the effectiveness of a career development system implemented at a research and technology organization at satisfying the context requirements of a decree issued by the Basque Country government. Through in-depth surveying of 80 R&D professionals over the five years, the authors aimed to determine whether a career development system, when it is linked to context requirements and researchers’ contributions, could offer researchers feedback about their career aims and increase their job satisfaction. During the five years of the study, the researchers’ capacity to meet career requirements improved by 20%, and job satisfaction, although it declined at first, increased substantially in the last two years, reaching a historic high for the employee satisfaction survey.     

Electro-mechanically controlled assembly of reconfigurable 3D mesostructures and electronic devices based on dielectric elastomer platforms

The manufacture of 3D mesostructures is receiving rapidly increasing attention, because of the fundamental significance and practical applications across wide-ranging areas. The recently developed approach of buckling-guided assembly allows deterministic formation of complex 3D mesostructures in a broad set of functional materials, with feature sizes spanning nanoscale to centimeter-scale. Previous studies mostly exploited mechanically controlled assembly platforms using elastomer substrates, which limits the capabilities to achieve on-demand local assembly, and to reshape assembled mesostructures into distinct 3D configurations. This work introduces a set of design concepts and assembly strategies to utilize dielectric elastomer actuators as powerful platforms for the electro-mechanically controlled 3D assembly. Capabilities of sequential, local loading with desired strain distributions allow access to precisely tailored 3D mesostructures that can be reshaped into distinct geometries, as demonstrated by experimental and theoretical studies of ∼30 examples. A reconfigurable inductive–capacitive radio-frequency circuit consisting of morphable 3D capacitors serves as an application example.     

A stage-specific cell-manipulation platform for inducing endothelialization on demand

Endothelialization is of great significance for vascular remodeling, as well as for the success of implanted vascular grafts/stents in cardiovascular disease treatment. However, desirable endothelialization on synthetic biomaterials remains greatly challenging owing to extreme difficulty in offering dynamic guidance on endothelial cell (EC) functions resembling the native extracellular matrix-mediated effects. Here, we demonstrate a bilayer platform with near-infrared-triggered transformable topographies, which can alter the geometries and functions of human ECs by tunable topographical cues in a remote-controlled manner, yet cause no damage to the cell viability. The migration and the adhesion/spreading of human ECs are respectively promoted by the temporary anisotropic and permanent isotropic topographies of the platform in turn, which appropriately meet the requirements of stage-specific EC manipulation for endothelialization. In addition to the potential of promoting the development of a new generation of vascular grafts/stents enabling rapid endothelialization, this stage-specific cell-manipulation platform also holds promise in various biomedical fields, since the needs for stepwise control over different cell functions are common in wound healing and various tissue-regeneration processes.     

展开式变奏在勃拉姆斯《D大调小提琴协奏曲》中的创作技法研究

文章通过对勃拉姆斯《D大调小提琴协奏曲》的详细剖析,从主题构建、呈示部创作、全曲整合多角度分析阐述展开式变奏在特定作品中的实际运用,并探析在这首作品中展开式变奏所呈现的独特创作技法,为研究勃拉姆斯创作手法中的创新性提供一定的参考。     

股权结构、研发投入与企业经营绩效关系研究

以我国316家信息技术业上市公司2014—2018年面板数据作为研究对象,通过运用多元线性回归和调节效应检验研究研发投入与经营绩效的关系及股权结构在二者关系间的调节作用。研究结果表明:第一,研发投入与企业经营绩效正相关,且研发人员投入对企业经营绩效的影响高于研发资金投入;第二,股权集中度、股权制衡度均与企业经营绩效正相关。因此,信息技术企业在提高研发创新能力时不仅需要足够的资金保障,更需要充足的智力支持,且适度提高股权集中度、股权制衡度可在一定程度上提高企业经营绩效。     

基于MIP-SLA的叶片陶瓷型芯光固化成型技术

为解决航空发动机空心涡轮叶片陶瓷型芯的3D打印难题,研究基于图像投影的复杂结构陶瓷型芯光固化成型（mask-image projection stereolithography,MIP-SLA）方法。搭建MIP-SLA工艺系统平台,对陶瓷浆料的制备和打印工艺参数的配置进行研究。分析利用球磨机将光敏树脂和陶瓷颗粒进行混合制备陶瓷浆料时,光敏树脂类型、固相含量、陶瓷颗粒粒径、分散剂含量和球磨时间对陶瓷浆料性能的影响。对不同配置参数下的打印效果进行对比分析,对确定的最佳打印工艺参数进行打印效果验证。