Results 131 to 140 of about 23,320 (232)
Research on the Control Software for High-end Precision Laser Processing Machines
, 2016 瞄准企业重大研发需求，本文首先对激光加工设备的控制软件设计方法进 行了研究。提出了面向激光加工设备的可重构控制软件体系结构，利用组件技 术建立了可重构机制，并依据激光加工设备控制软件相似功能的抽象描述进行 了可重构模块的划分。定义了设备控制软件中的关键数据对象，利用COM组 件设计了可重构模块。然后，针对3种高端精密激光加工设备开发出了合格的 产品。具体如下： （1）针对精密金属激光3D打印机的研发，分析了双缸型设备的运行原理， 根据企业已定型的设备SLM-100、SLM-150和SLM-280 ...
刘杰
core
Synthesis of graphene by PECVD and research on the performance of graphene-based Li-ion batteries [PDF]
, 2016 石墨烯是由碳六元环形成的二维蜂窝状晶格结构，只有一个碳原子的厚度，是第一种真正意义上的二维材料。由于这种特殊的结构，石墨烯拥有一些优异的物理和化学性能，如优异的力学性能、较好的柔韧性、良好的导电性能、很高的电子迁移率、较大的杨氏模量。这使得石墨烯在纳米电子器件、超级计算机、太阳能电池、透明电极等的应用方面具有很高的应用价值。但是所有这一切的前提是需要大规模制备出高质量的石墨烯。目前，石墨烯制备方法已有很多，但是要想实现石墨烯的产业化，就必须针对不同的应用实现石墨烯的大规模、高质量、可调控生长 ...
吴洁阳
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests worldwide are increasingly impacted by drought due to climate change, prompting plants to adapt through dehydration tolerance (DT) and avoidance (DA), two distinct physiological strategies.
Xingyun Liang +11 more
wiley +1 more source
Preparations and Structure Characterizations of Coatings with Water-absorbing Anti-fogging [PDF]
, 2016 汽车玻璃的面积约占汽车表面积的1/3，要求具有较好的光学性能、力学性能，同时还要求具备耐磨性能、耐热性能、安全性、密封性和隔音性能等，以保障乘员的安全。目前，汽车玻璃的发展方向主要有两个：一是提高汽车玻璃的安全性能，二是汽车玻璃的功能化。为了有效地改善车内的舒适性和提高汽车玻璃的功能，可以在保证汽车玻璃安全性的基础上附加调光、隔热、防眩、憎水、抬头显示、天线、光伏电加热等功能。 受环境温度和湿度的影响，汽车玻璃起雾是很常见的问题。起雾主要是因为当水汽接触到汽车玻璃后，由于玻璃表面温度较低 ...
王凯
core
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Studies have shown that organisms may adjust metabolic rates in response to thermal variability, highlighting metabolic plasticity as a key adaptive mechanism. Understanding the extent of metabolic plasticity of an organism is key to predicting its adaptation to climate
Qian Hu +6 more
wiley +1 more source
Preparation and performance of fine-diameter SiC-based ceramic fiber [PDF]
, 2017 连续细直径的碳化硅（SiC）纤维由于其高强度、耐高温、抗氧化等性能被用来做陶瓷基复合材料增强纤维。为了提高先驱体转化法制备的碳化硅纤维的性能，本文采用硼改性的聚钛碳硅烷，经过熔融纺丝，氧化交联，热解与烧结，制备含钛硼的碳化硅纤维。系统地研究了硼改性的聚钛碳硅烷高分子先驱体的结构及其纺丝性能，高分子纤维的氧化交联以及碳化硅纤维力学性能与吸波性能。 首先，采用液态聚硅烷、钛酸丁酯、硼酸丁酯反应合成含钛硼的高分子，然后将其与聚碳硅烷（PCS）混合制备了不同钛硼含量的硼改性聚钛碳硅烷 ...
王波伟
core
Methods in Ecology and Evolution, EarlyView.Abstract DNA barcode‐based species identification has become pivotal in biodiversity research. Current barcoding‐based deep learning methods have advantages in species identification but exhibit significant limitations. By using COI barcoding alone, previous studies were unable to fully capture species identification features. Prior methods showed that
Bin Ye +4 more
wiley +1 more source
Effects of parachute science on local research capacity 降落伞科学对当地研究能力的影响
Conservation Biology, EarlyView.Abstract Strengthening research capacity is essential to address the global biodiversity crisis. Yet, parachute science often undermines this goal, and its prevalence, costs, and benefits are unclear. We analyzed 13,502 publications on primate research that we extracted from Scopus (1960–2022) to evaluate the effects of parachute science on local ...
Li Yang +11 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2012 天津极地海洋馆钢结构屋盖根据仿生学原理模拟鲸鱼的外形。"鲸鱼"身长275m,宽117m,高45.6m,采用双层网壳结构模拟;尾部背鳍高69.4m,采用空间管桁架结构模拟。通过对其屋盖钢结构主体的有限元分析,主要研究了双层网壳结构在弹性支座和固定铰支座两种不同约束条件下的静力性能、动力特性和抗震性能,分析支座刚度对网壳结构性能的影响。相比固定铰支座,弹性支座可以明显地改善屋盖双层网壳结构的力学性能,对相关课题研究及工程设计具有一定的理论价值与实用意义。
王小盾, 白树杨
doaj
Conservation Biology, EarlyView.Abstract Consumer demand for ivory perpetuates the unsustainable and illegal killing of African elephants and other wildlife species. Interventions that aim to change consumer behavior are increasingly recognized as a crucial element of demand management. However, poor design and implementation have limited their effectiveness.
Molly R. C. Brown +2 more
wiley +1 more source