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RANDOMIZED POLICY OF A POISSON INPUT QUEUE WITH J VACATIONS

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Journal of Systems Science and Systems Engineering 2010年第1期19卷 50-71页

作者： Jau-Chuan KE kai-bin huang Wen Lea PEARN Department of Applied Statistic National Taichung lnstitute of Technology Taichung 404 Taiwan China Department of Industrial and Engineering Management National Chiao Tutig University Hsing Chu 300 Taiwan China

This paper studies the operating characteristics of an M/G/1 queuing system with a randomized control policy and at most J vacations. After all the customers are served in the queue exhaustively, the server immediately takes at most J vacations repeatedly until at least N customers are waiting for service in the queue upon returning from a vacation. If the number of arrivals does not reach N by the end of the jth vacation, the server remains idle in the system until the number of arrivals in the queue reaches N. If the number of customers in the queue is exactly accumulated N since the server remains idle or returns from vacation, the server is activated for services with probability p and deactivated with probability （l-p）. For such variant vacation model, other important system characteristics are derived, such as the expected number of customers, the expected length of the busy and idle period, and etc. Following the construction of the expected cost function per unit time, an efficient and fast procedure is developed for searching the joint optimum thresholds （N＊,J＊） that minimize the cost function. Some numerical examples are also presented.

关键词： Cost 〈 p N 〉 -policy supplementary variable technique vacation

Huge gastric plexiform fibromyxoma presenting as pyemia by rupture of tumor:A case report

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World Journal of Clinical Cases 2022年第7期10卷 2253-2260页

作者： Rui Zhang Li-Gang Xia kai-bin huang Nan-Di Chen The Second Clinical Medical College Shenzhen People’s HospitalJinan UniversityShenzhen 518020Guangdong ProvinceChina

BACKGROUND Plexiform fibromyxoma(PF)is a rare mesenchymal tumor,with limited case reports *** clinical symptoms are abdominal discomfort and bleeding signs,which frequently present slow-onset in reported ***,we report a case of gastric PF presenting as acute onset and with pyemia accompanying tumor *** resected the tumor as well as the distal gastric,bulbus duodeni and gallbladder for treatment in emergency ***,before the onset of the disease,the patient received coronavirus disease 2019(COVID-19)*** SUMMARY A 26-year-old man was admitted to our hospital,due to abdominal pain and fever after having received COVID-19 *** examination indicated severe *** tomography scan revealed a large mass in the *** of the gastrointestinal tract was seen during *** failure of anti-infective treatment and symptoms of shock developed,he received an emergency *** found a huge and partly ruptured mass,with thick ***,the mass was composed of spindle cells with clarified cytoplasm,accompanied by myxoid stroma and arborizing blood *** showed the tumor cells as positive for smooth muscle actin and succinate dehydrogenase subunit B but negative for DOG-1 and ***,the patient was diagnosed with gastric PF and discharged from the *** Gastric PF manifesting as tumor rupture combined with pyemia is *** surgery is critical for optimal prognosis.

关键词： Gastric plexiform fibromyxoma Clinical manifestations Sepsis Emergency surgery Pathology COVID-19 vaccines Case report

Validation of Angiostrongylus cantonensis combined with herpes simplex virus type 1 in cerebrospinal fluid by next-generation sequencing

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Chinese Medical Journal 2020年第2期133卷 247-249页

作者： Yong-Fang Zhang Sheng-Nan Wang Dong-Mei Wang kai-bin huang Ya-Fang Hu Department of Neurology Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong 510515China

To the Editor:Angiostrongylus cantonensis is one of the major causes of eosinophilic meningitis/meningoencephalitis,due to eating raw or undercooked paratenic or intermediate hosts like ***,we described a case of combined infection of *** and herpes simplex virus type 1(HSV-1)based on the results of next-generation sequencing(NGS).

关键词： encephalitis cerebrospinal fluid

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剑尾鱼在检测细菌毒力方面的应用

水产学报 2000年第5期24卷 467-471页

作者：潘厚军吴淑勤李凯彬黄志斌石存斌中国水产科学研究院珠江水产研究所!广东广州510380

用 18株从鱼类所分离的细菌攻毒剑尾鱼 ,结果显示细菌对剑尾鱼的毒力与回归感染或攻毒敏感鱼的毒力结果较为一致 ,另外 ,用剑尾鱼感染病原菌的适宜途径为背肌注射 ,与原代比较 ,近交高代剑尾鱼个体之间对病原菌的反应较为一致 ,感染后... 详细信息

用 18株从鱼类所分离的细菌攻毒剑尾鱼 ,结果显示细菌对剑尾鱼的毒力与回归感染或攻毒敏感鱼的毒力结果较为一致 ,另外 ,用剑尾鱼感染病原菌的适宜途径为背肌注射 ,与原代比较 ,近交高代剑尾鱼个体之间对病原菌的反应较为一致 ,感染后死亡时间相对集中。水生实验动物剑尾鱼在检测鱼类细菌的毒力方面有较好的应用前景

关键词：剑尾鱼细菌毒力检测

Merging bound states in the continuum in an open acoustic resonator

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 124-131页

作者： Lujun huang bin Jia Artem S.Pilipchuk Sibo huang Chen Shen Almas F.Sadreev Yong Li Andrey E.Miroshnichenko School of Physics and Electronic Sciences East China Normal University Institute of Acoustics Tongji University L.V.Kirensky Institute of Physics Department of Mechanical Engineering Rowan University School of Engineering and Technology University of New South Wales at Canberra

Bound states in the continuum （BICs） are perfectly localized resonances despite embedding in the continuum ***,an isolated BIC is very sensitive to the structure ***,we report merging acoustic BICs in a single open resonator,robust against the structure *** find that both symmetry-protected BIC and Friedrich-Wintgen BIC are sustained in a single coupled waveguide-resonator *** varying the height and length of the resonator,these two BICs move toward each other and merge into a single one at a critical *** to an individual BIC,the merged BIC is robust against fabrication error because its Q-factor is proportional to ΔL-4,whereΔL embodies the structure *** essence of this extraordinary phenomenon is perfectly explained by the two-and three-level approximations of the effective nonHermitian ***,we present direct experimental demonstrations of the moving and merging of BICs in a coupled 3D waveguide-resonator,which are evidenced by the vanishing of the linewidth of Fano resonance in the transmission *** results may find exciting applications in designing high-quality acoustic sources,sensors and filters.

关键词： acoustic resonances bound state in the continuum high-Q resonances

Cobalamin-dependent radical S-adenosyl-L-methionine protein functions with a partner to successively methylate tricyclic indole alkaloid for chuangxinmycin maturation and derivatization

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Science China Chemistry 2025年第1期 308-316页

作者： Sili Wang Jiancheng huang Yanan Du Wei huang Yufeng Xue Xiaokun Xu Guannan Zhong Yuanyuan Shi bin Hong Xiaoying Bian Wen Liu State Key Laboratory of Chemical Biology Shanghai Institute of Organic Chemistry University of Chinese Academy of SciencesChinese Academy of Sciences State Key Laboratory of Microbial Technology Shandong University National Health Commission (NHC) Key Laboratory of Biotechnology for Microbial Drugs Institute of Medicinal BiotechnologyChinese Academy of Medical Science & Peking Union Medical College

Cobalamin(Cbl)-dependent radical S-adenosyl-L-methionine(SAM) proteins constitute the largest collection of the radical SAM superfamily that has hundreds of thousands of individual members. Many of these proteins are involved in the biosynthesis of pharmaceutically important natural products to catalyze chemically demanding reactions. In the biosynthetic pathway of chuangxinmycin(CXM), a unique indole alkaloid antibiotic with potent anti-infective activity, functionalization of the characteristic thiopyrano[4,3,2-cd]indole scaffold by regio-and stereoselective C3-methylation is believed to rely on a Cbl-dependent radical process, which, however, remained to be reconstituted biochemically. We here report the dissection of this enzymatic process, which requires the incorporation of Cxm8, a Cbl-dependent radical SAM protein, with Cxm9, a DUF5825family protein that shares no homology to any proteins of known functions. Cxm8 and Cxm9 function together by forming an unexpected heterodimeric complex that selectively catalyzes C3-methylation of the tricyclic indole-S-hetero ring system in a successive manner, achieving CXM and a recently identified, C3-dimethylated congener. Detailed biochemical characterization,isotope labeling, structural simulation and bioinformatics analysis rationalized the catalysis of the Cxm8/Cxm9 complex and particularly the necessity of the DUF5825 protein for C3-methylase activity. This is the first example that a Cbl-dependent protein acts with a partner to exhibit radical SAM activity.

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A promising approach for quantifying focal stroke modeling and assessing stroke progression:optical resolution photoacoustic microscopy photothrombosis

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Neural Regeneration Research 2025年第7期20卷 2029-2037页

作者： Xiao Liang Xingping Quan Xiaorui Geng Yujing huang Yonghua Zhao Lei Xi Zhen Yuan Ping Wang bin Liu Faculty of Health Sciences University of MacaoMacao Special Administrative RegionChina Center for Cognitive and Brain Sciences University of MacaoMacao Special Administrative RegionChina Department of Biomedical Engineering Southern University of Science and TechnologyShenzhenGuangdong ProvinceChina State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoTaipaMacao Special Administrative RegionChina Department of Emergency Zhujiang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina

To investigate the mechanisms underlying the onset and progression of ischemic stroke,some methods have been proposed that can simultaneously monitor and create embolisms in the animal cerebral ***,these methods often require complex systems and the effect of age on cerebral embolism has not been adequately studied,although ischemic stroke is strongly *** this study,we propose an optical-resolution photoacoustic microscopy-based visualized photothrombosis methodology to create and monitor ischemic stroke in mice simultaneously using a 532 nm pulsed *** observed the molding process in mice of different ages and presented age-dependent vascular embolism ***,we integrated optical coherence tomography angiography to investigate age-associated trends in cerebrovascular variability following a *** imaging data and quantitative analyses underscore the differential cerebrovascular responses to stroke in mice of different ages,thereby highlighting the technique's potential for evaluating cerebrovascular health and unraveling age-related mechanisms involved in ischemic strokes.

关键词： age-dependent cerebral cortex ischemic stroke mouse model optical coherence tomography angiography photoacoustic microscopy photothrombosis vascular imaging

Protein arginine methyltransferase-6 regulates heterogeneous nuclear ribonucleoprotein-F expression and is a potential target for the treatment of neuropathic pain

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Neural Regeneration Research 2025年第9期20卷 2682-2696页

作者： Xiaoyu Zhang Yuqi Liu Fangxia Xu Chengcheng Zhou kaimei Lu bin Fang Lijuan Wang Lina huang Zifeng Xu Department of Anesthesiology International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Anesthesiology Shanghai General HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Shanghai Key Laboratory of Embryo Original Diseases ShanghaiChina

Protein arginine methyltransferase-6 participates in a range of biological functions,particularly RNA processing,transcription,chromatin remodeling,and endosomal ***,it remains unclear whether protein arginine methyl transferase-6 modifies neuropathic pain and,if so,what the mechanisms of this *** this study,protein arginine methyltransferase-6 expression levels and its effect on neuropathic pain were investigated in the spared nerve injury model,chronic constriction injury model and bone cancer pain model,using immunohistochemistry,western blotting,immunoprecipitation,and label-free proteomic *** results showed that protein arginine methyltransferase-6 mostly co-localized withβ-tubulinⅢin the dorsal root ganglion,and that its expression decreased following spared nerve injury,chronic constriction injury and bone cancer *** addition,PRMT6 knockout(Prmt6~(-/-))mice exhibited pain ***,the development of spared nerve injury-induced hypersensitivity to mechanical pain was attenuated by blocking the decrease in protein arginine methyltransferase-6 ***,when protein arginine methyltransferase-6 expression was downregulated in the dorsal root ganglion in mice without spared nerve injury,increased levels of phosphorylated extracellular signal-regulated kinases were observed in the ipsilateral dorsal horn,and the response to mechanical stimuli was ***,protein arginine methyltransferase-6 appeared to contribute to spared nerve injury-induced neuropathic pain by regulating the expression of heterogeneous nuclear ***,protein arginine methyltransfe rase-6-mediated modulation of hete rogeneous nuclear ribonucleoprotein-F expression required amino atids 319 to 388,but not classical H3R2 *** findings indicated that protein arginine methyltransferase-6 is a potential therapeutic target fo r the treatment of peripheral neuro pathic pain.

关键词： dorsal root ganglion heterogeneous nuclear ribonucleoprotein F neuropathic pain protein arginine methyltransferase-6 sensory neurons

Inhibiting SHP2 reduces glycolysis, promotes microglial M1 polarization, and alleviates secondary inflammation following spinal cord injury in a mouse model

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Neural Regeneration Research 2025年第3期20卷 858-872页

作者： Xintian Ding Chun Chen Heng Zhao bin Dai Lei Ye Tao Song Shuai huang Jia Wang Tao You Department of Orthopedics The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Department of Orthopedics Provincial Hospital Affiliated to Anhui Medical UniversityHefeiAnhui ProvinceChina

Reducing the secondary inflammatory response, which is partly mediated by microglia, is a key focus in the treatment of spinal cord injury. Src homology 2-containing protein tyrosine phosphatase 2(SHP2), encoded by PTPN11, is widely expressed in the human body and plays a role in inflammation through various mechanisms. Therefore, SHP2 is considered a potential target for the treatment of inflammation-related diseases. However, its role in secondary inflammation after spinal cord injury remains unclear. In this study, SHP2 was found to be abundantly expressed in microglia at the site of spinal cord injury. Inhibition of SHP2 expression using siRNA and SHP2 inhibitors attenuated the microglial inflammatory response in an in vitro lipopolysaccharide-induced model of inflammation. Notably, after treatment with SHP2 inhibitors, mice with spinal cord injury exhibited significantly improved hind limb locomotor function and reduced residual urine volume in the bladder. Subsequent in vitro experiments showed that, in microglia stimulated with lipopolysaccharide, inhibiting SHP2 expression promoted M2 polarization and inhibited M1 polarization. Finally, a co-culture experiment was conducted to assess the effect of microglia treated with SHP2 inhibitors on neuronal cells. The results demonstrated that inflammatory factors produced by microglia promoted neuronal apoptosis, while inhibiting SHP2 expression mitigated these effects. Collectively, our findings suggest that SHP2 enhances secondary inflammation and neuronal damage subsequent to spinal cord injury by modulating microglial phenotype. Therefore, inhibiting SHP2 alleviates the inflammatory response in mice with spinal cord injury and promotes functional recovery postinjury.

关键词： apoptosis glycolysis inflammatory response microglia neurons polarization spinal cord injury Src homology 2-containing protein tyrosine phosphatase 2