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New acquisition decision algorithm for multiple access interference suppression in DSSS system

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Journal of Systems Engineering and Electronics 2011年第1期22卷 157-163页

作者： Yongqing Wang Siliang wu Radar Research Laboratory Beijing Institute of Technology Beijing 100081 P. R. China

For decreasing the multiple access interference of weaker signal acquisition in direct sequence spread spectrum（DSSS） systems,a new single decision algorithm is *** maximum value of correlation results is conventionally ***,there may be not only one strong peak among correlation results when the cross-correlation noise is strong enough to affect the correlation *** proposed algorithm decreases the false alarm probability through the decision of the ratio of the maximum value and the second maximum value of the correlation *** analysis and simulation results indicate that the proposed algorithm effectively suppresses the acquisition problem of multiple access interference in DSSS system.

关键词： direct sequence spread spectrum(DSSS) multiple access interference acquisition false alarm probability.

GLOBAL ASYMPTOTIC REGULATION CONTROL FOR NONLINEAR SYSTEMS WITH iISS INVERSE DYNAMICS

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Journal of Systems Science & Complexity 2012年第2期25卷 249-261页

作者： Jiangbo YU Yuqiang wu School of Automation Southeast University Institute of Automation Qufu Normal University

This paper investigates a global asymptotic regulation control problem for a class of nonlinear systems with dynamic *** requirement of a priori knowledge of control directions is removed and the inverse dynamics satisfy the weaker integral input-to-state stable *** application of the changing supply rates and the Nussbaum-type gain techniques,a partial state-feedback regulator is *** main results demonstrate that the designed controller ensures the system state converges to the origin whereas the other signals of the closed-loop system are bounded. Simulation results are illustrated to show the effectiveness of the proposed approach.

关键词： Changing supply rates input-to-state stable (ISS) integral input-to-state stable (iISS) Nussbaum-type gain unknown control directions.

Flight mission modeling based on BDI Petri net

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Journal of Systems Engineering and Electronics 2017年第4期28卷 776-783页

作者： Yuanyuan Zhang Wenhai wu Qingdao Branch Naval Aeronautical Engineering Institute Qingdao 266041 China Navy Flight Academy Huludao 125000 China

Goals reasoning and management of pilot is a key issue to monitor pilot's behavior and intention. Traditional modeling methods are based on scenarios or situations, such methods will cause the,covering problem due to redundancy and are incapable of depicting interactions among various goals and plans of pilot. Petri net integrated with belief, desire and intention (BDI) theory (BDI Petri net) is designed to solve this problem. Focusing on the BDI theory, goal states of agent are discussed firstly. Belief, desire and intention are modeled by places and transitions based on the Petri net theory. In order to simplify the network, colored token is introduced to depict various states of belief, and the hierarchy transition is applied to model the intention, together with tokens' flow derrionstrating the interaction among various goals and relationship among belief, desire and intention. A search and rescue mission is used to validate the proposed method and the result indicates that the model can be used to monitor goals and behaviors of pilots.

关键词： Petri net belief desire and intention (BDI) theory flight mission modeling agent

Synthesis and Antibacterial Activities of Selenide Derivatives of Benzisoselenazolone

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wuhan University Journal of Natural Sciences 2001年第4期6卷 851-853页

作者： Yang Li ping, wu jun, Peng Yun shan, Liu Xiu fang, Xu Han sheng College of Chemistry and Molecular, wuhan University, wuhan 430072, China wuhan University College of Chemistry and Molecular Wuhan China (GRID:grid.49470.3e) (ISNI:***)

A series of Benzisolselenazolone (BISA) derivatives were synthesized and evaluated for their antibacterial activities againstE coli. by using LKB-2277 bioactivity monitor. Other bioactivities were tested by the method of High Throughput Screening for pharmaceutical activity compounds (HTP) BISA derivatives 3b, at the concentration of 40 μg/mL, showed 100%antibacterial activity and 62%inhibition rate of aldose reductase (at the concentration of 5μg/mL). These new compound structures have determined by IR,1H NMR and MS spectra.

关键词： BISA Ebselen antibacterial activity NO synthase Aldose reductase

Conformational isomerization:A novel mechanism to realize the AIE-TADF behaviors

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Aggregate

Aggregate 2023年第1期4卷 260-267页

作者： Hao wu Xiao-Chun Fan Hui Wang Feng Huang Xin Xiong Yi-Zhong Shi Kai Wang Jia Yu Xiao-hong Zhang Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhouJiangsuPR China Research Center for Green Printing Nanophotonic Materials Jiangsu Key Laboratory for Environmental Functional MaterialsSchool of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhouPR China

Thermally activated delayed fluorescence(TADF)materials with aggregationinduced emission(AIE)features can overcome aggregation-caused quenching(ACQ)and emit intensely in aggregate states and thus have attracted enormous attention in the fields of high-efficiency organic light-emitting diodes,bioimaging,photodynamic therapy,photocatalysis,***,their corresponding exact working mechanisms at the microscopic level are still far from ***,by carefully investigating the physical properties of our newly designed TADF material 6-(10H-spiro[acridine-9,9′-fluoren]-10-yl)nicotinonitrile in various states,we concluded that conformational isomerization plays an important role in realizing high photoluminescence quantum yields in its amorphous neat film state,in which the high-lying quasi-axial conformations with non-TADF features and low-lying quasiequal conformations with TADF characteristics serve as the host matrix and dopant,respectively,thus suppressing ACQ in disordered aggregate *** work not only offers a new possible microscopic mechanism by using conformational isomerization for the AIE-TADF phenomenon but also provides a novel method for designing high-efficiency AIE-TADF emitters.

关键词： aggregation-induced emission conformational isomerization microscopic mechanism thermally activated delayed fluorescence

Clinicopathological Study of Sporadic Burkitt Lymphoma in Children

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Chinese Medical Journal 2015年第4期128卷 510-514页

作者： Hui Huang Zhi-Liang Liu Hua Zeng Shou-Hua Zhang Chuan-Sheng Huang hong-Yan Xu Yan wu Song-Tan Zeng Feng Xiong Wen-ping Yang Department of Pathology Jiangxi Children's Hospital Nanchang Jiangxi 330006 China Department of Pathology Jiangxi Province Tumor Hospital Nanchang Jiangxi 330029 China Department of General Surgery Jiangxi Children@s Hospital Nanchang Jiangxi 330006 China

Background：Non-Hodgkin lymphoma is the fourth most common malignant tumors in children,Burkitt lymphoma （BL） accounts for 30-50％ of all pediatric *** aim of this study was to investigate the clinicopathologic features,immunophenotype,Epstein-Barr virus （EBV） infection and c-myc gene rearrangement of sporadic BL in ***：Ninety-two cases of pediatric BL were retrospectively analyzed for clinical features,immunohistochemistry,EBV-encoded RNA （EBER） status by in situ hybridization and c-myc gene rearrangement by fluorescence in situ ***：In the 92 cases,male is predominant in sex distribution （M：F =3.38：1）.The average age at diagnosis was 4.97 *** BL showed a lower clinical stage （P =0.002）,and advanced clinical stage and low serum albumin level at diagnosis were associated with poor outcome （P =0.024 and 0.053,respectively）.The positive expression of CD10,B-cell lymphoma-6,MUM1 and EBER were 95.7％（88 cases）,92.4％（85 cases）,22.8％（21 cases）,41.3％（38 cases）,*** expression of MUM1 were not associated with EBV infection status （P =1.000）.c-myc gene rearrangement was detected in 94.6％（87/92）.Clinical treatment information for 54 cases was collected,21 patients died of tumor after surgery alone,33 patients received surgery and chemotherapy,and of which six patients died shortly afterwords （MUM 1 positive expression in 3 cases,P =0.076）.Conclusions：The anatomical location,growth pattern and serum albumin level of BL were associated with biological ***1 may be a potential adverse prognostic marker,and not associated with EBV infection status.

关键词： Burkitt Lymphoma Epstein-Barr Virus Interphase Fluorescence In Situ Hybridization MUM1 Protein

Hypersonic starting flow at high angle of attack

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Chinese Journal of Aeronautics 2016年第2期29卷 297-304页

作者： Bai Chenyuan wu Ziniu Department of Engineering Mechanics Tsinghua University

Compressible starting flow at small angle of attack （AoA） involves small amplitude waves and time-dependent lift coefficient and has been extensively studied before. In this paper we consider hypersonic starting flow of a two-dimensional flat wing or airfoil at large angle of attack involving strong shock waves. The flow field in some typical regions near the wing is solved analytically. Simple expressions of time-dependent lift evolutions at the initial and final stages are given. Numerical simulations by compuational fluid dynamics are used to verify and complement the theoretical results. It is shown that below the wing there is a straight oblique shock （OSW） wave, a curved shock wave （CSW） and an unsteady horizontal shock wave （USW）, and the latter moves perpendicularlly to the wing. The length of these three parts of waves changes with time. The pres- sure above OSW is larger than that above USW, while across CSW there is a significant drop of the pressure, making the force nearly constant during the initial period of time. When, however, the Mach number is very large, the force coefficient tends to a time-independent constant, proportional to the square of the sine of the angle of attack.

关键词： Hypersonic Normal force Shock waves Starting flow Unsteady flow

Biliary spontaneous dislodgement spiral stent for patients who underwent mechanical lithotripsy

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World Journal of Gastroenterology 2020年第7期26卷 740-748页

作者： Lian-Song Ye Xiang-Lei Yuan Chun-Cheng wu Wei Liu Jiang Du Ming-hong Yao Qing-Hua Tan Bing Hu Department of Gastroenterology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Epidemiology and Health Statistics West China School of Public HealthSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND The incidence of post-endoscopic retrograde cholangiopancreatography(ERCP)cholangitis(PEC)in patients who underwent mechanical lithotripsy(ML)for large stone removal is high(up to 13.3%).One of the main causes is remaining small fragments or sludge that can impair normal biliary *** placement of a nasobiliary tube or a conventional plastic biliary stent has been commonly used under such conditions,but the patient may suffer from significant discomfort after the placement of a nasobiliary tube,while additional endoscopy is required for stent *** developed a biliary spontaneous dislodgement spiral stent(BSDSS)to overcome those *** To evaluate the feasibility,safety,and effectiveness of inserting a BSDSS for patients who underwent ML for large stone *** We conducted a single-center,retrospective,cohort study at West China Hospital,Sichuan University.A total of 91 consecutive patients with large biliary stones(≥10 mm)in the common bile duct who underwent ML between November 2017 and July 2018 were *** 49 eligible patients were divided into the BSDSS group and the nasobiliary tube *** success,post-ERCP adverse events(including PEC,post-ERCP pancreatitis,stone recurrence,BSDSS retention,self-extraction and dislocation of the nasobiliary tube),drainage time,and postoperative stay were measured and *** Twenty-one patients in the BSDSS group and 28 patients in the nasobiliary tube group were included in the *** baseline characteristics and clinical information were similar in the two *** of BSDSS and nasobiliary tube were technically successful in all 49 *** was no significant difference in the incidence of overall post-ERCP adverse events between the two groups(4.8%in the BSDSS group vs 17.9%in the nasobiliary tube group,P=0.219).The median duration of drainage time(3 d in the BSDSS group vs 4 d in the nasobiliary tube group)and length of postoperat

关键词： Cholangitis Choledocholithiasis Drainage Endoscopic nasobiliary drainage Mechanical lithotripsy Pancreatitis Spiral Stents

CHOVER'S LAW OF THE ITERATED LOGARITHM FOR NEGATIVELY ASSOCIATED SEQUENCES

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Journal of Systems Science & Complexity 2010年第2期23卷 293-302页

作者： Qunying wu Yuanying JIANG College of Science Guilin University of Technology Guilin University of Technology Guilin 541004 China.

Consider a sequence of negatively associated and identically distributed random variableswith the underlying distribution in the domain of attraction of a stable distribution with an exponentin(0,2).A Chover's law of the iterated logarithm is established for negatively associated *** results generalize and improve those on Chover's law of the iterated logarithm(LIL)type behavior previously obtained by Mikosch(1984),Vasudeva(1984),and Qi and Cheng(1996)fromthe i.i.d,case to NA sequences.

关键词： Domain of attraction law of the iterated logarithm negatively associated.