Manned spacecraft pose challenges in terms of extremely high safety and reliability, and with the growth of system complexity and longer on-orbit operation time, the traditional management mode, such as monitoring the threshold of parameter passively, is difficult to meet the required safety standards. Predictive maintenance, which analyzes the system heath trend and estimates remaining useful life (RUL) to establish maintenance strategies ahead of time before failure occurs, is a new mode to approach maintenance tasks. Here, a predictive maintenance strategy for complex manned spacecraft is proposed based on the remaining useful life estimation technique. Firstly, a health index is established based on an abundance of telemetry data, reflecting the system’s current health state. Secondly, we map the health index to the remaining useful life through system degradation modelling, taking into consideration both the 
system’s stochastic deterioration and uncertainty. The maintenance and management strategies are then made based on the calculated distribution of RUL time. Finally, a case study on Chinese space station energy system predictive maintenance is presented.

Using satellite remote sensing to monitor oil spill on the sea is an advanced means of oil spill monitoring, and it has the characteristics of wide coverage, speediness and real time, synchronization, continuity, and low cost. 
Hence, accelerating the research on this technology and establishing a satellite remote sensing monitoring mechanism suitable for oil spill emergency situations is of great significance to improve China’s oil spill monitoring capability and prevent or reduce the pollution damage caused by oil spill in the marine environment.
This paper analyzes and studies the current situation using satellite remote sensing to monitor oil spills at home and abroad. Based on the basic principle of satellite remote sensing, this paper systematically studies the satellite remote sensing monitoring oil spill principles, satellite data processing methods and oil spill information identification, and summarizes an oil spill identification system that can realize oil spill information reproduction. This system provides an important means of support for the handling of oil spill accidents.

Traditionally RF power amplifiers used Gallium Arsenide (GaAs) technology which has a well behaved and understood performance. Over the past few years Gallium Nitride (GaN) technology is replacing GaAs because GaN is 
more efficient and has a higher power density resulting in higher power MMICs and FETs.
Subject to system link budgets, we usually want to run a given amplifier as close to saturation as possible to minimize CAPEX costs. Running an amplifier closer to saturation causes many non-linear effects that can cause link performance degradation and interfere with other users.
To better understand and quantify the differences between GaN and GaAs amplifiers and the impact of this on system performance, some amplifier and system measurements will be taken. The findings will be documented in a white paper.

QIAN Xuesen published the article Technology of Organization and Management: Systems Engineering on September 27, 1978, pointing out that systems engineering is the technology of organization and management system that can be applied in all systems. The origin, formation and evolution of the systems engineering theory accompanied QIAN Xuesen’s whole life. The systems engineering theory is the concentrated reflection of QIAN’s achievements and theory in all aspects.

Systems science and systems engineering, as a new science and technology domain in modern science and technology, is developing rapidly, and showing greater and greater vitality. QIAN Xuesen is recognized as the pioneer and founder of systems science and systems engineering in China. His whole innovation process from systems thinking to systems practice has made pioneering contributions at different levels from engineering, technology, science to philosophy. These achievements and contributions have very important scientific value and practical significance. 
Presenting QIAN Xuesen’s contribution in systems science and practice, this paper elaborates the development and application of systems science and systems engineering.

The most distinctive feature of the new era is integration and innovation. With the rapid development of information technology and big data technology, the data era brought by artificial intelligence is coming. The systems engineering theory and methods summarized from engineering practice show more and more its importance and indispensability. The overall design department thoughts founded by scientist QIAN Xuesen is the result of the practice of systematic engineering science theory. The new development of the overall design department will inject intellectual support and technical support into the modernization of the national governance system and capabilities.