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Asymptotic Inference in the Random coeffic.ent Autoregressive Model with Time-functional Variance Noises

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 320-346页

作者： en-wen ZHU Zi-wei DenG Han-jun ZHANG jun cAO Xiao-hui LIU Department of Mathematics and Statistics Changsha University of Science and TechnologyChangsha 410114China School of Mathematics and computational Sc.ence Xiangtan UniversityXiangtan 411105China School of Statistics and Data Sc.ence and Key Laboratory of Data Science in Finance and EconomicsJiangxi University of Finance and EconomicsNanchang 330013China

This paper considers the random coeffic.ent autoregressive model with time-functional variance noises,hereafter the RcA-TFV *** first establish the consistency and asymptotic normality of the conditional least squares estimator for the constant *** semiparametric least squares estimator for the variance of the random coeffic.ent and the nonparametric estimator for the variance function are constructed,and their asymptotic results are reported.A simulation study is presented along with an analysis of real data to assess the performance of our method in finite samples.

关键词： random coeffic.ent autoregressive model time-functional variance conditional least squares semiparametric least squares

Recent Advances in Deciphering the Mechanisms and Biological Functions of DNA Demethylation

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chinese Journal of chemistry 2024年第6期42卷 645-651页

作者： Yang Feng sheng-jun c.en Bi-Feng Yuan Key Laboratory of Aquatic Product Processing Ministry of Agriculture and Rural AffairsNational R&D Center for Aquatic Product ProcessingSouth China Sea Fisheries Research InstituteChinese Academy of Fishery SciencesGuangzhouGuangdong510300 China School of Public Health Research Center of Public HealthRenmin Hospital of Wuhan UniversityWuhan UniversityWuhanHubei430071 China

5-Methylcytosine (5mc) is a dynamic and reversible epigenetic modification in genomic DNA of higher *** has been well-established that the demethylation of 5mc occurs through the ten-eleven translocation (TET)-mediated oxidation of 5mc followed by thymine DNA glycosylase (TDG)-initiated base excision repair (BER).Recent findings also have identified an alternative pathway of DNA *** this pathway,TET enzymes directly oxidize 5mc to form 5-formylcytosine (5fc) or 5-carboxylcytosine (5cac).These modified bases can undergo direct deformylation or decarboxylation,***,DNA demethylation can also occur through the deamination of 5mc and 5hmc,resulting in the production of thymine and 5-hydroxymethyluracil (5hmU),*** DNA demethylation pathways possess critical functional implications and roles in biological *** Recent Advances article will focus on the studies of mechanisms and biological functions of DNA demethylation,shedding light on the reversible nature of the epigenetic modification of 5mc.

关键词： Epigenetics DNA DNA methylation 5-Methylcytosine Demethylation Mechanisms Biological functions c—c bond cleavage Mass spectrometry

characterizations of Lie Triple Derivations on the Algebra of Operators in Hilbert c*-Modules

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Journal of Mathematical Research with Applications 2024年第3期44卷 387-396页

作者： Guangyu AN jun sheng jun HE Department of Mathematics Shaanxi University of Science and Technology Department of Mathematics Anhui Polytechnic University

Let A be a commutative unital c*-algebra with the unit element e and M be a full Hilbert *** by endA（M） the algebra of all bounded A-linear mappings on M and by M′the set of all bounded A-linear mappings from M into *** this paper,we prove that if there exists x0in M and f0in M′such that f0（x0）=e,then every A-linear Lie triple derivation on endA（M） is standard.

关键词： Lie triple derivation standard derivation Hilbert c*-module

Microstructure and texture evolution of cu–cr–co–Ti alloys during the two-stage cryorolling

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Rare Metals 2024年第9期43卷 4535-4547页

作者： Jia-jun Zhang Long-Jian Li Zhi-Feng Liu Zong-Ning c.en en-Yu Guo Hui-jun Kang Ren-Geng Li Tong-Min Wang Key Laboratory of Solidification control and Digital Preparation Technology (Liaoning Province) School of Materials Science and EngineeringDalian University of Technology center of Hyper-Gravity Experimental and Interdisciplinary Research Zhejiang University Ningbo Institute of Dalian University of Technology！Ningbo315000 China Key Laboratory for Light-Weight Materials Nanjing Tech University

This study entailed an investigation of the mechanical properties, microstructural and texture orientation evolutions of cuDcrDcoDTi alloys prepared via twostage cryorolling and intermediate aging treatment. To this end, X-ray diffraction and electron backscatter diffraction were employed. The results indicate that the two-stage cryorolling and intermediate aging treatments led to the development of profuse twin bundles and significantly enhanced the mechanical properties. The initial cryorolling led to coplanar slip and developed a strong Y({111} ) orientation, accelerating the formation of Goss({011} ) orientation and a Brass-type *** intermediate aging treatment relieved the restriction on dislocation slip and reoriented the grains toward the copper({112} ) and Z({111} ) *** Z orientation, with a relatively high volume fraction,dominated the macrotexture. Secondary cryorolling intensified twinning and shear banding, transforming the copper-type shear bands into Brass-type shear bands with rhomboidal prism morphology. The areas inside the Brasstype shear bands exhibited a Y orientation, and the areas outside the shear bands exhibited a stable Brass-type texture. The evident decrease in the weighted Schmid factors demonstrated that the two-stage cryorolling and intermediate aging treatment can modify the texture evolution and aid the design of high-performance cu alloys.

关键词： copper alloys Electron backscatter diffraction Macrotexture evolution Schmid factor Two-stage cryorolling

Narrowband blue emitter based on fused nitrogen/carbonyl combination with external quantum effic.ency approaching 30%

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Sc.ence china chemistry 2024年第1期67卷 351-359页

作者： Long c.en Jia-Heng cai You-jun Yu Yang-Kun Qu sheng-Yi Yang sheng-Nan Zou Rui-Hong Liu Dong-Ying Zhou Liang-sheng Liao Zuo-Quan Jiang Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Macao Institute of Materials Sc.ence and engineering Macao University of Science and TechnologyMacao 999078China

Multi-resonance thermally activated delayed fluorescence(MR-TADF)emitters can enable narrowband emission with high color purity and electroluminescence ***/carbonyl(N/c=O)system is receiving increasing attention while the nitrogen/boron(N/B)system has been widely *** decoration is an effective approach for N/B type MR-TADF system but always leads to broadening and red-shifting of the emission band in N/c=O MR-TADF *** attribute these unfavorable phenomena to the formation of intramolecular charge transfer between the MR-core and peripheral *** address this issue,we have developed a new strategy by decorating DMQAO(a fused N/c=O MR-core)with a triazine acceptor and a neutral terphenyl group to construct MTDMQAO and MBDMQAO,*** introduction of the triazine acceptor not only realizes effic.ent narrowband emission in MTDMQAO,but also accelerates the reverse intersystem crossing process through enhanced spin-orbital *** a result,MTDMQAO exhibits a significantly higher external quantum effic.ency of 29.4%compared to the referent emitters,validating the rationality of our derivation *** study highlights the potential of the N/c=O system for MR-TADF emitters and provides important insights for understanding the difference between N/B and N/c=O systems.

关键词： carbonyl group narrowband acceptor decoration thermally activated delayed fluorescence OLEDs

Strategy for Detecting Systemic Treatment Sensitivity of Primary Liver cancer Based on a Novel Infrared-emissive Organic Nanoparticle

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chemical Research in chinese Universities 2024年第1期40卷 145-152页

作者： WU jun LI Yongzhi QIN Hanjiao GAO Ying YANG Bing sheng Jiyao ZHANG Xuewen Department of Hepatobiliary and Pancreatic Surgery the Second Hospital of Jilin UniversityChangchun130022P.R.China Department of Radiation Oncology the Second Hospital of Jilin UniversityChangchun130022P.R.China State Key Laboratory of Supramolecular Structure and Materials Institute of Theoretical ChemistryCollege of ChemistryJilin UniversityChangchun130012P.R.China

In this study,we synthesized an organic material with near-infrared emission capabilities:4-(2-(4-(9-(4-(diphenylamino)phenyl)naphtho[2,3-c][1,2,5]thiadiazol-4-yl)phenyl)-1H-phenol-1-ylidene)malononitrile(TPA).Furthermore,TPA-PEG2000 fluorescent nanoparticles were prepared via coating the shells with ***-PEG2000 exhibited strong near-infrared emission near 700 nm,with a photoluminescence quantum yield of 15.09%,indicating a high emission *** biology experiments have confirmed its low toxicity and excellent *** cholesterol and phospholipid levels in liver cancer cell membranes with low sensitivity or high drug resistance lead to increased rigidity,reduced membrane fluidity,reduced endocytic effic.ency,and reduced ***,the uptake of TPA-PEG2000 nanoparticles into cells and the near-infrared fluorescence intensity can be used to evaluate the sensitivity of systemic liver cancer treatment in a simple and effic.ent manner.

关键词： Nanoparticle Near-infrared Fluorescence Systemic treatment sensitivity cell membrane fluidity

Insight into the experiment and extraction mechanism for separating carbazole from anthracene oil with quaternary ammonium-based deep eutectic solvents

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chinese Journal of chemical engineering 2024年第1期65卷 188-199页

作者： Xudong Zhang Yanhua Liu jun Shen Yugao Wang Gang Liu Yanxia Niu Qingtao sheng college of chemical engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China

carbazole is an irreplaceable basic organic chemical raw material and intermediate in *** separation of carbazole from anthracene oil by environmental benign solvents is important but still a challenge in chemical *** eutectic solvents (DESs) as a sustainable green separation solvent have been proposed for the separation of carbazole from model anthracene *** this research,three quaternary ammonium-based DESs were prepared using ethylene glycol (EG) as hydrogen bond donor and tetrabutylammonium chloride (TBAc),tetrabutylammonium bromide or choline chloride as hydrogen bond *** explore their extraction performance of carbazole,the conductor-like screening model for real solvents (cOSMO-RS) model was used to predict the activity coeffic.ent at infinite dilution (γ^(∞)) of carbazole in DESs,and the result indicated TBAc:EG (1:2) had the stronger extraction ability for carbazole due to the higher capacity at infinite dilution (c^(∞)) ***,the separation performance of these three DESs was evaluated by experiments,and the experimental results were in good agreement with the cOSMO-RS prediction *** TBAc:EG (1:2) was determined as the most promising ***,the extraction conditions of TBAc:EG (1:2) were optimized,and the extraction effic.ency,distribution coeffic.ent and selectivity of carbazole could reach up to 85.74%,30.18 and 66.10%,***,the TBAc:EG (1:2) could be recycled by using environmentally friendly water as *** addition,the separation performance of TBAc:EG (1:2) was also evaluated by real crude anthracene,the carbazole was obtained with purity and yield of 85.32%,60.27%,***,the extraction mechanism was elucidated byσ-profiles and interaction energy *** calculation results showed that the main driving force for the extraction process was the hydrogen bonding ((N–H...cl) and van der Waals interactions (c–H...O and c–H...π),which correspondin

关键词： carbazole Model anthracene oil Deep eutectic solvents cOSMO-RS Extraction mechanism

Potential applications of single-incision laparoscopic totally preperitoneal hernioplasty

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 2202-2210页

作者： Xiao-jun Wang Ting Fei Xiong-Hua Xiang Quan Wang en-c.eng Zhou Department of Gastrointestinal Surgery The First Affiliated Hospital of Ningbo UniversityNingbo 315020Zhejiang ProvinceChina Ambulatory Surgery center Xijing HospitalAir Force Military Medical UniversityXi’an 710032Shaanxi ProvinceChina

BAcKGROUND The totally preperitoneal(TPP)approach is a new concept that was recently *** the TPP approach combined with single-incision laparoscopic hernia repair has its own advantages,there is little evidence reflecting the characteristics and feasibility of either *** To analyze the potential applications of single-incision laparoscopic TPP(SILTPP)inguinal hernia hernioplasty for the treatment of inguinal *** A total of 152 SIL-TPP surgeries were performed at the First Affiliated Hospital of Ningbo University from February 2019 to November 2022.A single-port,named Iconport,and standard laparoscopic instruments were used during the *** data,intraoperative parameters and short-term postoperative outcomes were collected and retrospectively *** The demographic data of 152 patients underwent SIL-TPP were shown in Table *** average age was 49.5 years(range from 21 to 81 years).The average body mass index was 27.7 kg/m^(2)(range from 17.7 kg/m^(2) to 35.6 kg/m^(2)).SIL-TPP were conducted successfully in 147 *** patients were converted to the SILtransabdominal preperitoneal laparoscopic herniorrhaphy at the initial stage of the study due to a lack of *** 2 patients with incisional hernias,an auxiliary operation hole was added during the SIL-TPP procedure,as required for *** mean operative time was 64.5 minutes(range:36.0-110.0 minutes)for unilateral direct and femoral hernias and 81.6 minutes for indirect hernias(range:40.0-150.0 minutes).The mean postoperative hospital stay was 3.4 *** SIL-TPP is feasible and has advantages for inguinal hernia ***-TPP has potential benefits for patients with various abdominal wall ***,doctors should be encouraged to actively apply the TPP approach combined with a single incision in their daily work.

关键词： Totally preperitoneal hernioplasty Iconport Single incision laparoscopic Totally extraperitoneal herniorrhaphy Single incision laparoscopic totally preperitoneal hernioplasty

Ligation-assisted endoscopic submucosal resection following unroofing technique for small esophageal subepithelial lesions originating from the muscularis propria

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World Journal of Gastroenterology 2024年第32期30卷 3748-3754页

作者： Quan Lu Quan-Zhou Peng jun Yao Li-sheng Wang De-Feng Li Department of Gastroenterology Shenzhen People’s HospitalShenzhen 518020Guangdong ProvinceChina Department of Pathology Shenzhen People’s HospitalShenzhen 518020Guangdong ProvinceChina Department of Gastroenterology Shenzhen People’s HospitalThe Second Clinical Medical CollegeJinan UniversityShenzhen 518020Guangdong ProvinceChina The First Affiliated Hospital Southern University of Science and TechnologyShenzhen 518020Guangdong ProvinceChina

BAcKGROUND The majority of esophageal subepithelial lesions originating from the muscularis propria(SEL-MPs)are benign in nature,although a subset may exhibit malignant *** endoscopic resection techniques are time-consuming and lack efficacy for small *** To evaluate the efficacy and safety of ligation-assisted endoscopic submucosal resection(ESMR-L)following unroofing technique for small esophageal *** From January 2021 to September 2023,17 patients diagnosed with esophageal SEL-MPs underwent ESMR-L following unroofing technique at the endoscopy center of Shenzhen People’s *** of clinicopathological characteristics and clinical outcomes were collected and *** The mean age of the patients was 50.12±12.65 *** mean size of the tumors was 7.47±2.83 mm and all cases achieved en bloc resection *** average operation time was 12.2 minutes without any *** identified 2 Lesions(11.8%)as gastrointestinal stromal tumors at very low risk,12 Lesions(70.6%)as leiomyoma and 3 Lesions(17.6%)as smooth muscle *** recurrence was found during the mean follow-up duration of 14.18±9.62 *** ESMR-L following roofing technique is an effective and safe technique for management of esophageal SEL-MPs smaller than 20 mm,but it cannot ensure en bloc resection and may require further treatment.

关键词： Subepithelial lesions Muscularis propria Esophagus Ligation endoscopic submucosal resection