The reaction of H-phosphinates and secondary phosphine oxides with amines alcohols proceeds highly stereospecifically to give the corresponding coupling products inversion configuration at phosphorus center under Atherton−Todd conditions. This finding leads establishment a general efficient method for synthesis variety optically active organophosphorus acid derivatives from easily available chiral oxides.

Abstract The Airborne Warning and Control System (AWACS) are pivotal assets in aerial operations, necessitating specialised protection measures, serving as prime targets for enemy anti‐radiation missiles (ARMs). This paper explores approaches to enhance the battlefield survivability of frequency diverse array AWACS (FDA‐AWACS) by incorporating airborne radar technology onto platform. study commences analysing typical operational methods missiles. Following this, a deception model is...

Mobile networking researchers have long searched for large-scale, fine-grained traces of human movement, which remained elusive both privacy and logistical reasons. Recently, begun to focus on geosocial mobility traces, e.g. Foursquare checkin because their availability scale. But are we conceding correctness in our zeal data? In this paper, take initial steps towards quantifying the value datasets using a large ground truth dataset gathered from user study. By comparing GPS against...

Since a target's operational intention in air combat is realized by series of tactical maneuvers, its state presents the characteristics temporal and dynamic changes. Depending only on single moment to take inference, traditional recognition method neither scientific nor effective enough. Based gated recurrent unit (GRU), bidirectional propagation mechanism attention are introduced proposed aerial target method. The constructs an characteristic set through hierarchical approach, encodes into...

As the complementary concept of intuitionistic fuzzy entropy, knowledge measure Atanassov's sets (AIFSs) has attracted more attention and is still an open topic. The amount important to evaluate information. An entropy-based for AIFSs defined in this paper quantify conveyed by AIFSs. intuitive analysis on properties put forward facilitate introduction axiomatic definition measure. Then we propose a new based divergence with respect difference between membership degree, non-membership...

The Longshoushan Metallogenic Belt (northwestern China) is known for its word-class Jinchuan Ni-Cu sulfide (Pt) deposit and also an important uranium metallogenic belt. Jiling in this belt a typical Na-metasomatic deposit, which rarely occurs China. Mineralization the hosted granitoids that have suffered alteration. There are three kinds of minerals, including uraninite, pitchblende, coffinite deposit. Pitchblende predominant mineral. Integrating mineralogy geochemistry situ electron...

The use of electroencephalograms (EEGs) to diagnose and analyses Alzheimer's disease (AD) has received much attention in recent years. sample entropy (SE) been widely applied the diagnosis AD. In our study, nine EEGs from 21 scalp electrodes 3 AD patients 9 age-matched controls are recorded. calculations show that kurtoses patients' EEG positive higher than controls. This finding encourages us introduce a kurtosis-based de-noising method. 21-electrode is first decomposed using independent...

To solve the problems of combatting resource conflict, complex threaten by targets, and unstable battle field environment during air defense combat, we design a model dynamic weapon target assignment with hierarchical structure. In structure, multi-agent system is used to describe structure system, colored Petri net analysis mechanism in system. The has advantages both centralized decentralized. Moreover it good property capability deal complicated attack. end, will use an example analyze...

Zero-shot point cloud classification involves recognizing categories not encountered during training. Current models often exhibit reduced accuracy on unseen without 3D pre-training, emphasizing the need for improved precision and interoperability. We propose a novel approach that integrates differentiable rendering with contrastive language–image pre-training. Initially, autonomously learns representative viewpoints from data, enablingthe transformation of clouds into multi-view images...

This paper investigates dual-hop Reconfigurable Intelligent Surface (RIS) wireless communication systems with malicious jamming, where the destination node faces jamming from a jammer RIS-Equipped Unmanned Aerial Vehicle (UAV) relay. We model channel gains for Tx-RIS and Jammer-RIS links Rician distribution, while RIS-Rx link follows Nakagami-m status is modeled as Bernoulli-distributed random variable. derived provided closed-form expressions probability density functions (PDFs) of...

End-to-end speech translation (ST), which translates source language directly into target text, has garnered significant attention in recent years. Many ST applications require strict length control to ensure that the duration matches of audio, including both and pause segments. Previous methods often controlled number words or characters generated by Machine Translation model approximate sentence's without considering isochrony pauses segments, as can vary between languages. To address...

The multi-sensors autonomous cooperative mission planning is the senior situation of planning, and it plays an important role in information sharing, sources integration, optimization. Considering characteristic combat ability NSHV, several problems anti-NSHV systems are studied. First all, objects challenges analyzed; based on this, architecture mechanism given, interactive pattern system construction studied, then present model algorithm sensors management scheduling provided. At last,...

As a 3-D point cloud has the ability to present contour of an object clearly, it provides more spatial information for person identification (PI) task. Aiming at improvements on quality and distribution features, innovative treatment method novel network structure are investigated in this article. First, spatiotemporal feature is enhanced by implementing dual-stage density-based clustering applications with noise (DST-DBSCAN) method, which can filter most invalid points decrease sparsity...

The definition and characteristics of big data are summarized. From the era data, production command control system leads to 3 issues storage processing, situation generation decision-making, visualization. It takes construction a center discusses basics. accusation framework coping strategies adopted by cloud computing under conditions provide reference for application technology in systems, point out development trend next instruction system.

For task planning of the command and control structure, existing algorithms exhibit low efficiency poor replanning quality under abnormal conditions. Given requirements current accusation architecture, a distributed structure model is built in this paper based on multiagents, which exploits superiority multiagents achieving complex tasks. The concept MultiAgent‐HTN proposed framework. original hierarchical network algorithm optimized, multiagent collaboration framework redefined,...

As an important part of modern measurement science and technology, length has significant value in application research industrial production teaching practice. In the paper, integrated system integrating voice broadcast function, keyboard operation functions real-time display is designed; composition hardware stated flexible software programming used to meet requirements design; finally, tested.

Tin selenide (SnSe2) is a prospective anode material for sodium ion batteries due to its large interlayer spacing and high theoretical capacity. Yet, there are few studies on the SnSe2-based flexible electrodes Sodium-ion (SIBs). In addition, great volume expansion (≈420%) of SnSe2 during cycling, inevitably results in serious particles pulverization aggregation, making it kinetic problems, thus leading limited rate capability cycle stability practical application. To overcome these...