3D printing, also known as AM, is the process of making a 3D model, using digital data by manufacturing (printing) it layer by layer, using a 3D printing material.

CCTV is a TV system used for video surveillance that transmits signals to a specific place for monitoring purposes.

Mobile phone casings and structural parts form essential components of a mobile phone as they protect the circuitry and electronic parts integrated in the device. Mobile phone manufacturers attach high significance to mobile phone casings and structural parts. Casings and structural parts not only protect the electronic components of mobile phones, but also play a significant role in determining the design and aesthetics. Further, the design and materials used for mobile phone casings and structural parts help mobile manufacturers enhance their value proposition, which has been a key factor in fueling the growth of the market.

A PC peripheral is a component/device that can be connected to a PC either externally or internally to enhance its performance/capabilities. A component that is already a part of the PC is not considered as a peripheral. It refers to the physical parts added to the PC to enable an enhanced performance. For instance, devices such as mice, keyboards, printers, scanners, modems, and routers are known as PC peripherals.

Chemical sensors convert chemical signals into electrical signals and transfer these through transducers incorporated in a sensitive layer. These sensors help analyze the chemical composition of a sample, which is either in a liquid or gas form.

Safety and security are critical to any country's prosperity. Public safety is all about getting the right information to the right person at the right time to keep the surroundings safe. This can be achieved by using mobile broadband, which is a transformational technology. Mobil broadband is the introduction of next generation wireless data technology in field applications, equipping people with the best real-time data, video, voice or other forms of communication, and rich media services - all of which can be especially important in mission-critical situations. Ambulance crews can send vision of an injured person to doctors at a hospital so that an early diagnosis can be made and treatment started as quickly as possible. Police officers responding to an incident can have access to information, images, and video of the scene they are about to walk into. Fire crews can use public safety mobile broadband to obtain weather updates, look at maps of the local terrain, and review complex modeling of how a fire is advancing.

提出联合优化卫星通信系统中的功率和时隙资源的方法，以提高星上有限资源的使用能效。挖掘了功率和时隙资源在容量提升上的相互补充相互依存关系，考虑了多个地球站的信道条件和容量需求的差异性，建立了资源联合分配的状态组合模型，以适应各地球站的多资源利用模式。并以最大化能效为目标，设计了联合分配的迭代对偶优化(IDO)算法，以较低复杂度获得了最优联合分配方案。仿真分析表明，资源联合优化比非联合优化提高了能量利用效率，尤其在频率资源(载波数目)较少时优势更加明显。

传统的光学能见度仪分别存在各自的观测缺陷.数字摄像能见度观测系统是采用先进的数字摄像技术,完全仿照人眼观测能见度的原理,根据能见度的定义研制的新型能见度自动观测仪.本文重点介绍了它的基本原理、系统组成、硬件结构以及软件流程.最后给出了数字能见度仪与传统光学能见度仪及人工观测的比对结果.结果显示三者具有相同的变化趋势,但存在一定的观测差异.在降雨等复杂天气条件下,会有较大差异.

针对当前电信网中如何有效刻画含权网络的真实特征,完善和发展相关复杂网络模型的难题,特别是对通信社区检测结果层次结构不清晰及运算复杂度高的问题,从复杂网络特征分析入手,设计了一种新的通信社区检测算法。该算法基于通信强度排序方法实现通信社区的有效检出,基于通信密度分布生成高分辨率层次嵌套树,通过距离矢量修剪嵌套树,实现社区稳定检测和层次结构分析同时降低计算复杂度。该算法使用真实网络数据进行了有效验证。