Technical advancements and significance of circumlunar return and reentry spacecraft

As one of the vital steps in the 3rd phase of China＇s lunar exploration program （CLEP）, the circumlunar return and reentry spacecraft, developed by China Academy of Space Technology （CAST）, is used to demonstrate the key technologies of by- per-speed return and reentry spacecraft. The system configuration and flight process are presented in this paper, as well as the analysis of mission characteristics, the key technologies and the technical advancement during the R＆D progress. The significance of circumlunar return and reentry spacecraft is given at the end.

Batteries for electric vehicles:Technical advancements,environmental challenges,and market perspectives

The rapid evolution of electric vehicles(EVs)highlights the critical role of bat-tery technology in promoting sustainable transportation.This review offers a comprehensive introduction to the diverse landscape of batteries for EVs.In particular,it examines the impressive array of available battery technologies,focusing on the predominance of lithium-based batteries,such as lithium-ion and lithium-metal variants.Additionally,it explores battery technologies beyond lithium(“post-lithium”),including aluminum,sodium,and magnesium batter-ies.The potential of solid-state batteries is also discussed,along with the current status of various battery types in EV applications.The review further addresses end-of-life treatment strategies for EV batteries,including reuse,remanufactur-ing,and recycling,which are essential for mitigating the environmental impact of batteries and ensuring sustainable lifecycle management.Finally,market per-spectives and potential future research directions for battery technologies in EVs are also discussed.

Reform and Opening up,the Motive Power for the Technical Advance of Dongfang Hydroelectric Equipment

Preface On October 13, 1958, in the county town of Deyang in southwestern China, a new power equipment manufacture enterprise-Dongfa ng Electric Machinery was es tablished, which had been placed

The power of green:Harnessing phytoremediation to combat micro/nanoplastics

Plastic pollution and its potential risks have been raising public concerns as a global environmental issue.Global plastic waste may double by 2030,posing a significant challenge to the remediation of environmental plastics.In addition to finding alternative products and managing plastic emission sources,effective removal technologies are crucial to mitigate the negative impact of plastic pollution.However,current remediation strategies,including physical,chemical,and biological measures,are unable to compete with the surging amounts of plastics entering the environment.This perspective lays out recent advances to propel both research and action.In this process,phytoaccumulation,phytostabilization,and phytofiltration can be applied to reduce the concentration of nanoplastics and submicron plastics in terrestrial,aquatic,and atmospheric environments,as well as to prevent the transport of microplastics from sources to sinks.Meanwhile,advocating for a more promising future still requires significant efforts in screening hyperaccumulators,coupling multiple measures,and recycling stabilized plastics from plants.Phytoremediation can be an excellent strategy to alleviate global micro/nanoplastic pollution because of the cost-effectiveness and environmental sustainability of green technologies.

Achievements and problems of geotechnical engineering investigation in China

As an industry and a discipline,geotechnical investigation in China differs from that in the USA and European countries in its course of emergence and evolution. For over half a century,Chinese geotechnical investigation professionals witnessed continuous technical advances as they undertook independently almost all of China's large-scale construction projects. Based on projects that won the "National Outstanding Engineering Investigation" Gold Medal Awards since the year 2000,this paper discusses the achievements of geotechnical investigation in the context of comprehensive technical ability,project evaluation and analysis,hi-tech applications and engineering monitoring,and analyzes several factors that have hindered the industry's further development and alignment with international practice. Finally,some suggestions are given for future improvement.

The progress in the treatment of spastic cerebral palsy with selective dorsal rhizotomy (SDR)

Spasticity is the main disabling clinical manifestation of children with cerebral palsy(CP).Selective dorsal rhizotomy(SDR)has been performed for the treatment of spastic CP in Asia for quite some time from 1990.The purpose of this review is to discuss the historical origin and development of SDR.Our goal here is to identify the current patient selection criteria for SDR and to point out indications and contraindications based on the patients with CP,age from 2 to 18 years-old,over 6000 cases,who received SDR surgery with spasticity of muscle tension more than 3 degrees in our center.We also discuss evidence-based approaches on how to evaluate postoperative patient outcomes of SDR and how complications can be avoided.Finally,we mention progress made in terms of SDR technical advances and how improvements can be made in the future.In conclusion,SDR surgery is a reliable way to improve outcomes of patients with spastic CP and can be done carefully in patients as long as stringent selection criteria are used.However,more research and technological advancements are needed to help address associated complications.