Species distribution models are widely used in conservation biology and invasive biology. MaxEnt the most among existing modeling tools. In process, default parameters often to build model. However, these tend be overfit. Aiming at this problem, study uses an optimized model analyze impact of past, present future climate on distributions Codonopsis pilosula , economic species, provide a theoretical basis for its introduction cultivation. Based 264 records eight environmental variables,...

Unraveling bacterial identity through Raman scattering techniques has been persistently challenging due to homogeneously amplified signals across a wide variety of molecules, predominantly protein- or nucleic acid-mediated. In this study, we present an approach involving the use silver nanoparticles completely and uniformly "mask" adsorption on surface molecules sodium borohydride chloride. This enables acquisition enhanced surface-enhanced (SERS) from all components surface, facilitating...

We developed novel shackled P-chiral ligands based on 1-phosphanorbornenes and oxazolines. They were subsequently evaluated in palladium-catalyzed (4+2) annulations, producing enantioenriched tetrahydropyran scaffolds good yields with high site selectivity enantioselectivity. Moreover, chemoselective (4+4) products also achieved by using acyclic imines. In addition, density functional theory calculations performed to afford the energy profile of Michael addition step ring formation step....

Gel polymer electrolytes (GPEs) with high ionic conductivity and good flexibility have emerged as promising alternatives to traditional liquid electrolytes. Metal–organic frameworks (MOFs), a hierarchical pore structure porosity, attracted widespread attention high-performance solid However, severe agglomeration of MOF particles hampers Li+ transport, the flammability organic in GPEs poses safety risks. Herein, inspired by bioadhesive properties marine mussels, we developed novel...

Generation of non-stabilized β-ester diazos and their applications in carboxylic acid O–H insertion reactions have been reported, which afford β-acyloxy esters excellent yield. Varieties aryl- alkyl-substituted are well tolerated this reaction under mild convenient conditions. Moreover, structural modification the natural product molecular drug can also be achieved reaction. This protocol not only realizes involving unstable but provides an efficient strategy for synthesis esters.

Lithium metal batteries have emerged as a promising candidate for next-generation power systems. However, the high reactivity of lithium with liquid electrolytes has resulted in decreased battery safety and stability, which poses significant challenge. Herein, we present modified laponite-supported gel polymer electrolyte (LAP@PDOL GPE) that was fabricated using situ polymerization initiated by redox-initiating system at ambient temperature. The LAP@PDOL GPE effectively facilitates...

The main purpose of the paper is to analyze computational difficulties selecting suitable classification algorithms that satisfy specific ethical criteria, when real data used in training. Employing an imbalanced credit decision dataset largely for scoring and applying a set several fairness we show many typical do not reasonable manner more than one criterion considering protected attribute. This adds layer difficulty ones represented by need large databases data- computationally-intensive...

Recently, the development of high-rate performance lithium-ion batteries is crucial for next-generation energy storage systems. Nanoarchitecturing electrode material a common strategy to improve effective Li+ diffusion transport rate. However, this method often results in reduction volumetric density and battery stability. In work, we propose different by synthesizing submicron-sized Ti2Nb10O29 (s-TNO) as durable anode using facile scalable solution combustion method, eliminating dependence...

Time synchronization is one of the key points in distributed a real-time simulation system.At first, system introduced.Secondly, time method under 1PPS signal put forth.Thirdly, relevant technology are studied, including structure, SNTP, and control logic.Vxworks watch dog timer mode timecard counter this also analyzed detail precision presented.Fourthly, Arena software chosen to model simulate procedure.At last, whole constructed experiment results given out prove efficiency method.

This paper addresses the problem of task allocation in real-time distributed systems with goal maximizing system reliability, it has been shown to be NP-hard. Many studies have made solve this without considering constraint. We first take account deadline constraint order formulate problem, and then propose an improved simulated annealing algorithm call adaptive memory-based (AMSA) problem. The AMSA introduces factors reduce total computation time, adds memory function save recently visited...

According to the different time constraints for simulation tasks, a multi-level distributed real-time platform was proposed, on which hardware layer mainly introduced solve rigorous tasks. The framework under centralized management given. Then, FPGA and DSP boards were well designed. Especially, reflective memory network bottom communication studied. An external clock synchronization module in given achieve microsecond precision. Also, data dispatch scheduling mechanism elaborated. Finally,...

According to the current main application mode of remote sensing satellites, users obtain original image data, carries on complex data processing, and get required substantive content by filtering results after processing. The poor timeliness, large amount transmitted from satellite ground, heavy workload ground processing system are drawbacks such modes. This article presents an intelligent onboard multichannel transmission concept for infrared satellites solve above problems. Through...

Summary In order to make full use of the link resources for data transmission from near‐earth remote sensing satellites, variable coding modulation (VCM) system is used fully utilize margin improve satellite performance. By analyzing dynamic under VCM system, contribution optimization studied perspective engineering application, which can provide reference design satellites. Applying flow design, currently adopted X band, compared with traditional constant (CCM) average performance be...

Abstract Daily electricity consumption in summer is affected by numerous meteorological factors. In order to improve the accuracy of daily forecasting, a combination forecasting model based on characteristic factors proposed this paper. Firstly, relationship between various indexes and analysed considering coupling effect accumulative consumption, single forecast established. Then mapping function designed evaluate impact each index weight calculated. Finally, The parameters are optimized...

This paper addresses the problem of task allocation in real-time distributed systems with goal maximizing system reliability, which has been shown to be NP-hard. We take account deadline constraint formulate this and then propose an algorithm called chaotic adaptive simulated annealing (XASA) solve problem. Firstly, XASA begins optimization takes a walk solution space generates several local minima; secondly improves SA via schemes continues search optimal based on results optimization. The...

Linear features represent a large category of physical or abstract that overlay on terrain surface. The essential requirement rendering scale linear is to render the vector data surface properly, rapidly and dynamically with balance capacity, visual effect performance. Derived from fact average time per point varies line length, geometry-based approach proposed through virtual connections best length selection achieve high performance for features. 50000 points suggested most applications...

A new SN2′ reaction type of Morita–Baylis–Hillman (MBH) ester with sulfonyl anion, generated in situ via detrifluoroacetylation as a nucleophile is developed. Experimental results and DFT calculations disclose that the proceeds C–C bond cleavage to generate PhSO2CF2 C–S anion release CF2 carbene, an MBH ester. The features operational simplicity, wide substrate scope, high yields, excellent stereoselectivity, which represents mode fluorinated gem-diols also provides efficient way obtain...

Being able to safely land on the surface is one of primary challenges when a probe exploring an asteroid. In order ensure landing safety, location planning needs comprehensively consider terrain characteristics and avoid obstacles such as protruding rocks, craters slopes. Relatively flat areas are suitable for landing. If multiple landers together, in collisions maintain good communication, appropriate distance should be maintained between landers. this paper, we first establish environment...