3D打印技术是指基于离散材料逐层堆积成形的原理，依据产品三维CAD模型，快速制造出产品原型或零部件的数字化制造技术，本文通过3D打印的产业规模、基本特点、竞争格局、发展预测等几个方面进行了分析。

2014年7月份，全国电信业务总量完成1513.1亿元，同比增长14.6%，比6月回升1.0个百分点；电信主营业务收入完成968.0亿元，同比下降3.5%,环比下降1.1%，主营业务收入增长乏力。 2014年1-7月，全国电信业务总量累计完成10132.1亿元，同比增长15.0%，比1-6月下降0.1个百分点；电信主营业务收入累计完成6925.4亿元，同比增长4.2%，比1-6月下降1.4个百分点，再次延续同比增速持续回落的趋势。

2013年中国战略性新兴产业总体呈现良好发展态势，保持了相对较快的产业增速。展望2014年，全球经济将延续缓慢复苏的步伐，而中国转经济、调结构也进入攻坚期和深水区，战略性新兴产业有望迎来快速发展的最佳契机，成为引领经济增长的重要引擎。

2014年2季度，国家继续出台系列措施，规范和促进通信行业发展：为了促进电信行业改革，推进国家税收制度改革步伐，财政部、国家税务总局联合发布《关于将电信业纳入营业税改征增值税试点的通知》；为了充分发挥市场定价机制作用，提升通信行业市场竞争活力，工业和信息化部、国家发展改革委联合发布了《关于电信业务资费实行市场调节价的通告》；为了充分利用频谱资源，平衡4G发展格局，实现TD-LTE和LTE FDD融合发展，工信部批准中国电信和中国联通分别在16个城市开展LTE混合组网试验。

本文分别从2013-2014年中国服务器市场概述、市场竞争格局等几个方面进行了分析。

报告包括2014年7月下半月通信行业的国际要闻、国内要闻、区域要闻以及国际国内企业要闻综述。

2014年6月份，我国文化产业运行平稳。虽然行业投资规模增速略有回落，但依然明显高于全国城镇固定资产投资增速。电影票房市场快速增长，国内票房增速达25%，进口片票房大增70%以上；国内电影生产形势较好，影片数量较上月增加明显。电视剧制作和 发行市场继续优化，现实题材剧继续保持着较高的比例。2014年下半年，我国电视内容终端方面可能出现变革，其余领域预计继续将保持平稳增长势头。由于广电总局在6月份连续发布通知要求治理各类电视盒子，包括乐视、小米在内的一些盒子生产企业都受到明显冲击，电视盒子市场可能被广电垄断。

A drive is an adjustable speed device that regulates the speed and direction of motors. Adjustment is made by varying the current flow through the motor. Drives are classified into two broad categories based on the type of current: AC drives and DC drives. AC drives are used to control AC electric motors, while DC drives are used for DC electric motors. Drives are widely used in the Manufacturing industries to regulate and control electrical devices such as fans, conveyors, machine spindles, and pumps during the production process.

RFID technologies have begun to draw attention across several sectors, particularly in the Healthcare sector as hospitals have begun adopting innovative technologies to cater to critical business needs. RFID smart cabinet technology reduces manual efforts to maintain, track, and manage inventory. It also helps reduce loss and misplacement of supplies, increases savings,and minimizes the risk of theft. RFID smart cabinets are primarily used by retailers, healthcare institutions, and discrete manufacturers where there is a need for inventory management.

A passive component is a module that does not require energy to perform its function.Capacitors, inductors, and resistors are the major passive components.

A new approach approach to tunable mid-infrared lasers, an optically pumped, type-II, InGaSb/InAs gain medium with a chirped distributed feedback grating, has been developed. The chirped grating is patterned using an interferometric lithography (IL) technique with spherical wave fronts and etched into the top cladding of the laser slab waveguide structure. A reduced longitudinal chirp grating fabrication technique has been developed that dramatically extends the single frequency tuning range. Continuous tuning of 80nm around 3.1 um with 320 mW single facet output power at 80K and a 1.6nm FWHM is reported. The present device is designed in the 3-to-4 um range which matches a low loss atmospheric transmission window, and covers an important region of molecular vibration spectra, in particular, the hydrocarbon C-H stretch at 3.3 um, making it suitable for atmospheric pressure remote gas sensing of industrially important small molecules such as methane, hydrogen chloride and ammonia.

For conventional imaging systems, GEO space objects cannot be resolved due to their 40 Mm distance. There exists a strong need to obtain high resolution images of GEO objects and to accomplish this task, investigation into the suitability of ISAL is currently underway. A critical component in determining this suitability is to accurately model the atmospheric impacts on LADAR pulses. Conventional knowledge says that while the atmosphere churns, wind is the predominant cause of temporal evolution which simplifies all modeling and simulation into the frozen flow hypothesis. The concern is that the frozen flow hypothesis based phase screen generation techniques fail to accurately predict the temporal development of optical phase. This thesis proposes a new approach and provides a detailed derivation of a new temporally evolving Zernike polynomial based atmospheric phase screen generation model. This new model is experimentally verified, and utilized to analyze atmospheric impacts on mixing efficiencies. It is shown that this new turbulent flow model more accurately predicts mixing efficiency than that of the basic frozen flow approximation.