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Time series analysis model for forecasting unsteady electric load in buildings

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Energy and Built Environment

Energy and Built Environment 2024年第6期5卷 900-910页

作者： dandan Liu Hanlin Wang Shanghai University of Electric Power Shanghai 201306China

Accurate and reliable load forecasting is crucial for ensuring the security and stability of the power *** paper proposes a combined prediction method based on Empirical Wavelet Transform(EWT)and Autoformer time series prediction model for the non-stationary and non-linear time series of electric *** original sequence is first decomposed by EWT to obtain a set of stable subsequences,and then the Autoformer time series prediction model is used to predict each ***,the prediction results of each subsequence are combined to obtain the final prediction *** proposed EWT-Autoformer prediction model is applied to an electric load example,and the experimental results are compared with the Recurrent Neural Network(RNN)method,Long Short-Term Memory(LSTM)method,and Informer method under the same *** experimental results indicate that compared to LSTM,the method proposed in the paper has an R2 improvement of 9–20 percentage points,an improvement of 6–8 percentage points compared to RNN,an improvement of 3–7 percentage points compared to Informer,and an improvement of 2–3 percentage points compared to *** addition,the RMSE and MAE are also significantly lower than other models.

关键词： Load forecasting EWT Neural networks Informer Autoformer

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管理者从军经历与企业研发投入

科研管理 2021年第6期42卷 166-175页

作者：郎香香尤丹丹大连理工大学商学院辽宁盘锦124221

自改革开放以来,我国进行了数次大规模的裁军活动,军人管理者已成为中国商界的重要力量。本文以2008—2016年沪深两市A股上市企业为研究样本,基于烙印理论和高阶理论,采用面板模型回归,实证检验了管理者从军经历对企业研发投入的影响作... 详细信息

自改革开放以来,我国进行了数次大规模的裁军活动,军人管理者已成为中国商界的重要力量。本文以2008—2016年沪深两市A股上市企业为研究样本,基于烙印理论和高阶理论,采用面板模型回归,实证检验了管理者从军经历对企业研发投入的影响作用及机制。结果表明:(1)管理者从军经历与企业研发投入正相关,有从军经历管理者的企业中研发投入更多;(2)在竞争激烈行业、无政治关联企业、非国有企业以及从军经历管理者是创始人的企业中,管理者从军经历对企业研发投入的正向影响更加显著;(3)管理者风险承担性在管理者从军经历对企业研发投入的影响中起到部分中介作用;(4)管理者从军经历不仅能够增加企业的研发投入,还能够提高企业的专利技术申请量。本文的研究丰富了管理者异质性领域的相关研究,打开了从军经历管理者对企业研发投入影响的"黑箱",对上市企业尤其是创新型企业任用管理者提供了指导意义。

关键词：从军经历风险承担性研发投入

Experimental study on effects of gas flow rate on soot characteristics in diffusion flames coupled with plasma

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Science China(Technological Sciences) 2024年第2期67卷 475-485页

作者： QI dandan CHEN MingXiao TU Xin LIU Dong MIIT Key Laboratory of Thermal Control of Electronic Equipment School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China Advanced Combustion Laboratory School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China Department of Electrical Engineering and Electronics University of LiverpoolLiverpool L693GJUK

This study examined the evolution of morphology and nanostructure of soot particles from the plasma-flame interaction for various gas flow *** current study used both optical diagnostic and sampling methods to explore the soot production and combustion *** particles were characterized at the same positions downstream from the flame zone by thermophoretic sampling and transmission electron ***,X-ray diffraction analysis,and thermogravimetric analysis were performed to study the nanostructure and oxidation reactivity of soot.A reduction in soot concentration was found with the plasma addition,which illustrated an inhibition effect of plasma on soot *** increased gas flow rate promoted soot concentration since a growing number of carbons participated in the combustion *** on the gas flow rate(carbon content)variation and plasma activation,either liquid-like soot material with irregularly shaped protrusions or chain-like structure,or a mixture of both,were generated from the diffusion *** soot produced by plasma-flame interaction also demonstrated a high correlation between nanostructure and *** soot from lower carbon content with plasma activation had a shorter fringe length and larger fringe tortuosity related to higher oxidation *** the contrary,soot from the highest carbon content without plasma-flame interaction exhibited prevalent fullerene-like nanostructures with evident large or small shells and also had a higher carbonization degree resulting in lower oxidation reactivity.

关键词： soot characteristics gas flow rate plasma diffusion flames

LFM Radar Source Passive Localization Algorithm Based on Range Migration

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Journal of Beijing Institute of Technology 2024年第2期33卷 130-140页

作者： dandan Li Deyi Wang Hao Huan Beijing Key Laboratory of Fractional Signals and Systems School of Information and ElectronicsBeijing Institute of TechnologyBeijing 100081China Beijing Aerospace Automatic Control Institute Beijing 100854China

Traditional single-satellite passive localization algorithms are influenced by frequency and angle measurement accuracies,resulting in error estimation of emitter position on the order of ***,a single-satellite localization algorithm based on passive synthetic aper-ture(PSA)was introduced,enabling high-precision ***,its estimation of azimuth and range distance is considerably affected by the residual frequency offset(RFO)of uncoopera-tive system ***,it requires data containing a satellite flying over the radia-tion source for RFO *** estimating the RFO,an accurate estimation of azimuth and range distance can be carried out,which is difficult to achieve in practical *** LFM radar source passive localization algorithm based on range migration is proposed to address the dif-ficulty in estimating frequency *** algorithm first provides a rough estimate of the pulse repetition time(PRT).It processes intercepted signals through range compression,range interpola-tion,and polynomial fitting to obtain range migration ***,it uses the changing information of range migration and an accurate PRT to formulate a system of nonlinear equations,obtaining the emitter position and a more accurate PRT through a two-step localization *** offset only induces a fixed offset in range migration,which does not affect the changing *** algorithm can also achieve high-precision localization in squint ***,the effectiveness of this algorithm is verified through simulations.

关键词： passive localization range migration residual frequency offset

Rational Design of Plasmonic Nanoparticle-Molecule Complexes for Chirality Sensing

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Chinese Journal of Chemistry 2024年第8期42卷 903-919页

作者： Chen Wang dandan Lu Lichao Sun Qingfeng Zhang College of Chemistry and Molecular Sciences Wuhan UniversityWuhanHubei430072 China

Comprehensive Summary,Sensing the chirality of molecules is of great importance to fields such as enantioselective synthesis,pharmaceutical industry,and *** nanoparticles are ideal candidates for molecular sensing due to their inherent plasmonic properties that significantly enhance their sensitivity to surrounding *** plasmonic nanoparticle-molecule complexes for chirality sensing has drawn enormous attention in recent years due to their intriguing properties and potential ***,in this review,we believe it is timely to circumnavigate the rational design of plasmonic nanoparticle-molecule complexes and widen the scope of their emerging applications in chirality ***,we present different fundamental mechanisms for plasmon-based chirality that are built on the system of plasmonic nanoparticle-molecule ***,we review the typical applications of plasmonic nanoparticle-molecule complexes in chirality ***,we discuss the emerging biomedical applications that the plasmon-based chirality has attracted enormous ***,we provide an outlook on the challenges and opportunities in the field of plasmonic approaches for chirality sensing.

关键词： Chirality Surface plasmon resonance Nanoparticles Chiral molecules Chirality sensing

Design and optimization of a greener sinomenine hydrochloride preparation process considering variations among different batches of the medicinal herb

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Chinese Journal of Chemical Engineering 2024年第7期71卷 77-90页

作者： dandan Ren Jiale Xie Tianle Chen Haibin Qu Xingchu Gong Pharmaceutical Informatics Institute College of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China National Key Laboratory of Chinese Medicine Modernization Zhejiang UniversityHangzhou 310058China Jinhua Institute of Zhejiang University Jinhua 321016China

The current methods used to industrially produce sinomenine hydrochloride involve several issues,including high solvent toxicity,long process flow,and low atomic utilization efficiency,and the greenness scores of the processes are below 65 *** solve these problems,a new process using anisole as the extractant was *** exhibits high selectivity for sinomenine and can be connected to the subsequent water-washing *** alkalization of the medicinal material,heating extraction,water washing,and acidification crystallization were carried *** process was modeled and *** design space was *** recommended operating ranges for the critical process parameters were 3.0–4.0 h for alkalization time,60.0–80.0℃ for extraction temperature,2.0–3.0(volume ratio)for washing solution amount,and 2.0–2.4 mol·L^(-1) for hydrochloric acid *** new process shows good robustness because different batches of medicinal materials did not greatly impact crystal purity or sinomenine transfer *** sinomenine transfer rate was about 20%higher than that of industrial *** greenness score increased to 90 points since the novel process proposed in this research solves the problems of long process flow,high solvent toxicity,and poor atomic economy,better aligning with the concept of green chemistry.

关键词： Sinomenine hydrochloride Process optimization Anisole

Complications and comorbidities associated with antineoplastic chemotherapy:Rethinking drug design and delivery for anticancer therapy

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Acta Pharmaceutica Sinica B 2024年第7期14卷 2901-2926页

作者： Xiaoman Mao Shuang Wu dandan Huang Chong Li College of Pharmaceutical Sciences Southwest UniversityChongqing 400715China Medical Research Institute Southwest UniversityChongqing 400715China School of Pharmaceutical Sciences Southern Medical UniversityGuangzhou 510515China

Despite the considerable advancements in chemotherapy as a cornerstone modality in cancer treatment,the prevalence of complications and pre-existing diseases is on the rise among cancer patients along with prolonged survival and aging *** relationships between these disorders and cancer are intricate,bearing significant influence on the survival and quality of life of individuals with cancer and presenting challenges for the prognosis and outcomes of ***,we review the prevailing complications and comorbidities that often accompany chemotherapy and summarize the lessons to learn from inadequate research and management of this scenario,with an emphasis on possible strategies for reducing potential complications and alleviating comorbidities,as well as an overview of current preclinical cancer models and practical advice for establishing bio-faithful preclinical models in such complex context.

关键词： Complications Comorbidities Chemotherapy Preclinical cancer models Drug design Drug delivery

Shock Initiation Experiments with Modeling on a DNAN Based MeltCast Insensitive Explosive

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Defence Technology（防务技术） 2024年第2期32卷 655-662页

作者： Feichao Miao dandan Li Yangfan Cheng Junjiong Meng Lin Zhou School of Chemical Engineering Anhui University of Science and TechnologyHuainan 232001China Composite Explosive Research Department Xi'an Modern Chemistry Research InstituteXi'an 710065China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

2,4-dinitroanisole(DNAN)is a good replacement for 2,4,6-trinitrotoluene(TNT)in melt-cast explosives due to its superior *** the increasing use of DNAN-based melt-cast explosives,the prediction of reaction violence and hazard assessment of the explosives subjected to shock is of great *** study investigated the shock initiation characteristics for a DNAN-based melt-cast explosive,DHFA,using the one-dimensional Lagrangian *** embedded manganin gauges in the apparatus record the pressure histories at four Lagrangian positions and show that shock-todetonation transition in DHFA needs a high input shock *** experimental data are analyzed to calibrate the Ignition and Growth *** calibration is performed using an objective function based on both pressure history and the arrival time of *** agreement between experimental and calculated pressure histories indicates the high accuracy of the calibrated parameters with the optimization method.

关键词： 2,4-Dinitroanisole(DNAN) Shock initiation Insensitive explosives Ignition and growth model Equation of state(EOS)

Comparative Study of Genetic Structure and Genetic Diversity betweenWild and Cultivated Populations of Taxus cuspidata,Northeast China

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Phyton-International Journal of Experimental Botany 2024年第2期93卷 355-369页

作者： dandan Wang Xiaohong Li Yanwen Zhang School of Science Liaodong UniversityDandong118003China

Taxus cuspidata is a rare plant with important medicinal and ornamental *** at the obvious differences between wild and cultivated populations of *** from Northeast China,a total of 61 samples,that is,33 wild yews and 28 cultivated yews were used to analyze the differences and correlations of the kinship,genetic diversity,and genetic structure between them by specific length amplified fragment sequencing(SLAF-seq).Finally,470725 polymorphic SLAF tags and 58622 valid SNP markers were *** analysis showed that 61 samples were classified into 2 clusters:wild populations and cultivated populations,and some wild yews were categorized into the cultivated populations;the genetic diversity analysis showed that the Nei diversity index of wild populations(0.4068)was smaller than that of cultivated populations(0.4414),and the polymorphic information content(PIC)of wild populations(0.2861)was smaller than that of cultivated populations(0.3309).The genetic differentiation analysis showed that the total populations of gene diversity(H_(t))of cultivated and wild populations were respectively 0.8159 and 0.5685,the coefficient of gene differentiation(G_(st))of cultivated and wild populations was respectively 0.3021 and 0.1068,and the gene flow(N_(m))(2.4967)of wild populations was larger than cultivated populations(0.8199).The molecular variance(AMOVA)revealed that inter-population variation accounted for 29.57%of the total genetic variation,while intra-population variation accounted for 70.42% of the total genetic variation(p<0.001),this suggested that the genetic variation in the *** is mainly attributed to within-population *** conclusion,the genetic distance between geographical ecological groups of wild populations was generally smaller than that of cultivated populations,and the degree of genetic diversity and genetic differentiation was smaller than that of cultivated *** evident,the utilization of SLAF-seq technolog

关键词： T.cuspidata SLAF-seq SNP wild population cultivated population genetic structure