Biomass-Derived Materials for Electrochemical Energy Storage and Conversion: Overview and Perspectives

Electrochemical energy storage and conversion(EESC) technology is key to the sustainable development of human society. As an abundant and renewable source, biomass has recently shown widespread applications in EESC, achieving both low environmental impact and high performances. This article provides overview and perspectives on various types of biomassderived materials, their preparation, the role in EESC and the desired features, performances and limitations, and future research efforts.

Core-drilling kinematic modeling and analysis of Jiaolong submersible manipulator

The complicated topographies of the deep sea pose significant challenges for the core drilling with the Jiaolong submersible manipulator.To address this problem,we proposed a core-drilling kinematic model and evaluated the core-drilling behavior of the submersible manipulator by comprehensively considering the uncertain posture of the Jiaolong submersible.First,we established a forward kinematic model for the core-drilling task in deep sea,which satisfied the requirement of gravitational-direction core drilling.Based on the forward kinematic equations,we then built a double-redundancy inverse kinematic model,which was able to determine the required motion trajectories of six active joints according to the desired core-drilling trajectory.The core-drilling workspaces and the motions of the Jiaolong submersible manipulator were assessed with several calculation examples.The established forward and inverse kinematic models are constructed with clear analytic equations,and thus are directly applicable to the Jiaolong submersible manipulator-based core-drilling task.

Laparoscopic duodenum-preserving pancreatic head resection:a narrative review

Pancreatic surgery is one of the most complex and challenging fields in abdominal surgery associated with extensive surgical trauma,damage to adjacent organs,a long operation time and a high incidence of postoperative complications.Since the early 1990s,laparoscopic techniques have been applied to a growing number of pancreas surgeries,and great progress has been achieved in laparoscopic pancreaticoduodenectomy.As surgeons become proficient in laparoscopic pancreaticoduodenectomy techniques,laparoscopic techniques are gradually used in other pancreatic surgeries,such as laparoscopic distal pancreatectomies and laparoscopic duodenum-preserving pancreatic head resection(LDPPHR),which may benefit patients by reducing postoperative pain and hospital stays and providing a quick recovery to normal activity.Recently,a great number of literature have introduced LDPPHR.It is a good surgical method for benign and low-grade malignant tumors of the pancreatic head.Although LDPPHR is technically feasible,it is not yet generally practicable and limited to highly skilled endoscopic surgeons,and the long-term results after LDPPHR are still not well defined.This article aims to provide a literature review of LDPPHR to assess its feasibility,safety,postoperative recovery,and future outlook according to early experiences of this technique.