光伏：短期内单晶产能扩张速度有限，光伏行业目前仍存预期差。我们持续跟踪的中来股份 4 月 10 日公布 1 季度业绩预告，预计 1 季度归母净利润7000 万-8000 万元，同比增长 92.33%-119.81%；隆基股份 4 月 13 日公布 1季度业绩预告，预计 1 季度归母净利润 4 亿-4.5 亿元，同比增长 50%-70%。本周我们继续看好单晶相关个股表现，相关 1 季报预告显示单晶产业链如我们所预期的继续维持高景气度，重点关注中来股份、隆基股份。

EO/IR systems are an essential part of military operations. These systems encompass a broad array of distinct technologies that are based on target acquisitions and mission requirements. Such EO/IR systems are used in different military applications like airborne, land-based, and naval. Some of the airborne EO/IR systems are optic sights, observation systems, helmet mounted displays, and night vision systems. Land-based EO/IR systems include night vision goggles, weapon mounted sights, vehicle mounted optronics devices, thermal imagers, laser rangefinders, and designators. Naval based EO/IR systems include thermal imagery systems, infrared imaging and detectors, optronics mast systems, and surveillance and tracking systems. These systems assist in the battlefield with better visibility, tracking, and targeting of enemy locations.

The process used to create objects of a uniform cross-sectional profile is known as extrusion. The material to be extruded is pushed through a die of the desired crosssection. The extrusion process may be semi-continuous as well as the continuous process. It can be carried out on hot as well as cold materials. Some commonly extruded materials include metals, polymers, concrete, ceramics, and foodstuffs.

MNS have software programs, which help to correspond through phone calls, instant messages, e-mails, public address, digital signage, two-way radio, pop-up messages, social media, and app push notifications. To be effective, they should have a strong communication structure that should include enough bandwidth to distribute thousands of messages. Delivery can be visual, audio, or a mixture of the two approaches. The global mass notification systems market will account for a CAGR of 15.62% during the forecast period.

Heating, ventilation, and air conditioning (HVAC) is one of the most energy-intensive systems in commercial and residential buildings. HVAC insulation is crucial to the energy efficiency, performance, and sustainability of HVAC systems. HVAC insulation helps in controlling the heat that is dissipated through conduction, convection, and radiation. Apart from their unique thermal properties, insulation materials also provide protection against sound, fire, and physical impact.

Injection molding is the most commonly used manufacturing process for the fabrication of plastic parts. Injection molding is used to manufacture a wide variety of products, which vary considerably in their dimensions, complex structures, and end-use applications. The injection molding is done by an injection molding machine and requires plastic and the typical raw material, and a shaping mold. The molding machine melts the plastic, which is then injected into the mold, where it cools and solidifies into the final part.

Conventional air conditioner compressors can run at only one speed. Therefore, these compressors turn on and off at intervals to maintain the temperature inside an air conditioner. This results in high energy consumption. However, inverter technology air conditioner compressors can run at different speeds depending on the load required by the air conditioner. In inverter technology air conditioners, variable motor electronic speed drives modulate the power supplied to the motor as per load or set temperature (judged through additional circuitry), which further modulates the compressor's function. The flexible modulation thus achieved varies the speed of the compressor to provide the temperature that is required.

UPS systems provide emergency power when the main power supply fails. These systems are used to protect equipment and machinery from unexpected power disruptions that could result in loss of productivity. UPS systems are of two types — online and offline.

Power modules consist of multiple discrete power semiconductor devices. Power module packages offer higher power density and are more reliable than discrete power semiconductors. Original equipment manufacturers will continue to demand modular power solutions, which can be integrated easily into different subsystems and used in many different devices, during the forecast period. Power modules are widely used in applications such as in inverters for wind converters, photovoltaic solar energy systems, and other renewable energy applications. They are also used in industrial motor drives and hybrid and electric vehicles (EVs).

电力设备行业板块上周电力设备行业板块下跌 3.95%，同期沪深 300 指数下跌 0.57%，电力设备行业相对沪深 300 指数跑输 3.39 个百分点。电力设备行业上周涨跌幅在中信 29 个板块中位列第 17，总体表现中等。