检索结果-南通市图书馆

World Journal of Clinical Cases 2024年第11期12卷 1947-1953页

作者： yang Xiong Jin Li Han-Jie yang Department of Urology Pingxiang People’s HospitalPingxiang 337000Jiangxi ProvinceChina

BACKGROUND Schwannomas are rare peripheral neural myelin sheath tumors that originate from Schwann *** the different types of schwannomas,pelvic sciatic nerve schwannoma is extremely *** preoperative diagnosis of pelvic schwannomas is difficult,and surgical resection is the gold standard for its definite diagnosis and *** SUMMARY We present a case of pelvic schwannoma arising from the sciatic nerve that was detected in a 40-year-old man who underwent computed tomography for intermittent right lower back pain caused exclusively by a right ureteral ***,successful transperitoneal laparoscopic surgery was performed for the intact removal of the stone and en bloc resection of the *** total operative time was 125 min,and the estimated blood loss was *** surgical procedure was *** patient was discharged on postoperative day 5 with the simultaneous removal of the urinary ***,the patient presented with motor and sensory disorders of the right lower limb,caused by partial damage to the right sciatic *** tumor recurrence was observed at the postoperative *** Histopathological examination of the specimen confirmed the diagnosis of a ***,laparoscopic surgery is safe and feasible for concomitant extirpation of pelvic schwannomas and other pelvic and abdominal diseases that require surgical treatment.

关键词： Schwannoma Sciatic nerve Laparoscopy Ureteral calculi Pelvic neoplasms Case report

Epidemiological and Genetic Characteristics of the H3 Subtype Avian Influenza Viruses in China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China CDC weekly 2021年第44期3卷 929-936页

作者： Jiaying yang Lei yang Wenfei Zhu Dayan Wang Yuelong Shu School of Public Health(Shenzhen) Shenzhen Campus of Sun Yatsen UniversityShenzhenGuangdongChina Chinese National Influenza Center National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina.

Avian influenza viruses(AIVs)are naturally preserved in waterfowls and sometimes spill over to infect humans and mammalian *** H3 subtype is one of the most prevalent influenza virus subtypes in *** 2000,H3 subtype AIVs have been continuously isolated from poultry and wild birds in the mainland of China,which implied a dynamic spread in large-scale geography and multiple *** of H3 with N1–N8 subtypes were reported,among which H3N2 and H3N8 subtypes predominated.

关键词： mainland poultry continuously

LLMP： Exploiting LLDP for Latency Measurement in Software-Defined Data Center Networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2018年第2期33卷 277-285页

作者： yang Li Zhi-Ping Cai Hong Xu College of Computer National University of Defense Technology Changsha 410073 China Department of Computer Science City University of Hong Kong Hong Kong 9990V7 China

The administrators of data center networks have to continually monitor path latency to detect network anomaly quickly and ensure the efficient operation of the networks. In this work, we propose Link Layer Measurement Protocol （LLMP）, a prototype latency measuring framework based on the Link Layer Discovery Protocol （LLDP）. LLDP is utilized by the controller to discover network topology dynamically. We insert timestamps into the optional LLDPTLV field in LLDP, so that the controller can estimate latency on any single link. The framework utilizes a reactive measurement approach without injecting any probe packets to the network. Our experiments show that the latency of a link can be measured accurately by LLMP. In relatively complex network conditions, LLMP can still maintain a high accuracy. We store the LLMP measurement results into a latency matrix, which can be used to infer the path latency.

关键词： software-defined network (SDN) Link Layer Discovery Protocol (LLDP) latency measurement

Responses of protists with different feeding habits to the changes of activated sludge conditions:A study based on biomass data

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2012年第12期24卷 2127-2132页

作者： Bo Hu Rong Qi Wei An Min yang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Changes of protists, which were categorized into different functional groups primarily according to their feeding habits, in two full-scale municipal wastewater treatment systems experiencing sludge bulking were investigated over a period of 14 months. Protist biomass represented 3.7% to 5.2% of total biomass on average under normal sludge conditions, and the percentage increased significantly （p 〈 0.05） under sludge bulking conditions. The biomass of Chilodonella spp., capable of eating filamentous bacteria, tended to decrease in both systems when sludge bulking occurred, showing that the abnormal growth of filamentous bacteria did not lead to a biomass bloom of this group of protists. On the other hand, the bactivorous protists represented more than 96% of total protist biomass, and the biomass of this group, particularly the attached ciliates, increased significantly （p 〈 0.05） when sludge bulking occurred. The significant increase of the attached ciliates may have possibly facilitated the growth of filamentous bacteria through selectively preying on non-filamentous bacteria and further exacerbated sludge bulking. The redundancy analysis and correlation analysis results showed that the biomass changes of the attached ciliates were primarily related to the sludge volume index and to some extent related to five-day biochemical oxygen demand loading and hydraulic retention time.

关键词： protist biomass activated sludge feeding habit sludge bulking

Effects of built-in electric field and donor impurity on linear and nonlinear optical properties of wurtzite InxGa1-xN/GaN nanostructures

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第8期29卷 479-484页

作者： Xiao-Chen yang Yan Xing School of Physical Science and Technology Inner Mongolia UniversityHohhot 010021China

The linear and nonlinear optical absorption coefficients(ACs)and refraction index changes(RICs)of 1s-1p,1p-1d,and 1f-1d transitions are investigated in a wurtzite InxGa1-xN/GaN core-shell quantum dot(CSQD)with donor impurity by using density matrix *** effects of built-in electric field(BEF),ternary mixed crystal(TMC),impurity,and CSQD size are studied in *** finite element method is used to calculate the ground and excited energy state energy and wave *** results reveal that the BEF has a great influence on the linear,nonlinear,and total ACs and *** presence of impurity leads the resonant peaks of the ACs and RICs to be blue-shifted for all transitions,especially for 1s-1p *** is also found that the resonant peaks of the ACs and RICs present a red shift with In-composition decreasing or core radius ***,the amplitudes of the ACs and RICs are strongly affected by the incident optical *** absorption saturation is more sensitive without the impurity than with the impurity,and the appearance of absorption saturation requires a larger incident optical intensity when considering the BEF.

关键词： core-shell quantum dot linear and nonlinear optical properties impurity ternary mixed crystal

Recent advances in polymeric membranes for CO_2 capture

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2018年第11期26卷 2238-2254页

作者： yang Han W.S.Winston Ho William G.Lowrie Department of Chemical and Biomolecular Engineering and Department of Materials Science and Engineering The Ohio State University

Membrane and membrane process have been considered as one of the most promising technologies for mitigating CO_2 emissions from the use of fossil fuels. In this paper, recent advances in polymeric membranes for CO_2 capture are reviewed in terms of material design and membrane formation. The selected polymeric materials are grouped based on their gas transport mechanisms, i.e., solution‐diffusion and facilitated transport. The discussion of solution‐diffusion membranes encompasses the recent efforts to shift the upper bound barrier, including the enhanced CO_2 solubility in several rubbery polymers and novel methods to construct shape-persisting macromolecules with unprecedented sieving ability. The carrier-bearing facilitated transport membranes are categorized based on the specific CO_2-carrier chemistry. Finally, opportunities and challenges in practical applications are also discussed, including post-combustion carbon capture(CO_2/N2), hydrogen purification(CO_2/H2), and natural gas sweetening(CO_2/CH4).

关键词： Carbon capture Polymeric membrane Gas separation

Development of a method to quantify total and free irinotecan and 7-ethyl-10-hydroxycamptothecin(SN-38) for pharmacokinetic and bio-distribution studies after administration of irinotecan liposomal formulation

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Pharmaceutical Sciences 2019年第6期14卷 687-697页

作者： Wenqian yang Zimeng yang Jieru Liu Dan Liu Yongjun Wang Wuya College of Innovation Shenyang Pharmaceutical UniversityShenyang 110016China Key Laboratory of Structure-Based Drugs Design&Discovery of Ministry of Education Shenyang Pharmaceutical UniversityShenyang 110016China

In 2015,liposomal formulation of irinotecan(ONIVYDE)has been approved by FDA and widely applied in the treatment of pancreatic *** is a novel liposome formulation,entrapping CPT-11 in the aqueous core of vesicles using a modified gradient loading *** to toxicity concerns,it is essential to explore a rapid and reliable method to effectively isolate and quantify the non-liposomal,namely,free CPT-11and total CPT-11 in *** study focuses on separation of non-liposomal CPT-11,evaluation of the pharmacokinetics of free CPT-11 and total CPT-11 and bio-distribution after intravenous administration of CPT-11 *** CPT-11 in plasma was separated by solid-phase extraction(SPE).The amount of total CPT-11 and main metabolite 7-ethyl-10-hydroxycamptothecin(SN-38)in plasma was quantified by ultra-performance liquid chromatography–MS/*** calibration curves fitted well and lower limit of quantitation for SN-38,free CPT-11,total CPT-11 and CPT-11 in tissue and were 5 ng/ml,10 ng/ml,4.44 ng/ml and 25 ng/ml *** recoveries,precision and accuracy of the method appear *** this method,the pharmacokinetics and bio-distribution of CPT-11 liposome formulation after an intravenous dose of 2.5 mg/kg were then investigated.

关键词： Irinotecan Liposome UPLC-MS-MS SPE Pharmacokinetics Bio-distribution

Ultrasonic Wireless Communication Through Metal Barriers

在线全文

学校读者我要写书评

暂无评论

Sound & Vibration 2019年第2期53卷 2-15页

作者： Jianing Zhang Ziying Yu Hengxu yang Ming Wu Jun yang State Key Laboratory of Acoustics and Key Laboratory of Noise and Vibration Research Institute of AcousticsChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina

Ultrasound can be used as a carrier to realize wireless communication to and from a metal-enclosed space,which has the characteristics such as immunity to the electromagnetic shielding effect and non-destructive penetration of metal *** paper firstly reviews the previous studies in the field of ultrasonic wireless communication through metal barriers,and summarizes their achievements and the existing ***,an overview of the research methods involved in studying the characteristic of acoustic-electric channel is presented,and the principles are introduced for the actual measurement method,equivalent circuit method,ABCD parameter method,finite element analysis method and time-domain finite difference ***,an overview of the communication algorithms are presented such as orthogonal frequency division multiplexing(OFDM),single-carrier frequency domain equalization and multiple input multiple output ***,the potential future study are proposed in light of the trend of development and unsolved problems.

关键词： Wireless communication ultrasound piezoelectric transducers metal barriers

Dual-targeting AAV9P1-mediated neuronal reprogramming in a mouse model of traumatic brain injury

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第3期19卷 629-635页

作者： Jingzhou Liu Xin Xin Jiejie Sun Yueyue Fan Xun Zhou Wei Gong Meiyan yang Zhiping Li Yuli Wang yang yang Chunsheng Gao State Key Laboratory of Toxicology and Medical Countermeasures Beijing Institute of Pharmacology and ToxicologyBeijingChina Academy of Medical Engineering and Translational Medicine Medical CollegeTianjin UniversityTianjinChina

Traumatic brain injury results in neuronal loss and glial scar *** neurons and eliminating the consequences of glial scar formation are essential for treating traumatic brain *** reprogramming is a promising strategy to convert glial scars to neural ***,previous studies have reported inconsistent *** this study,an AAV9P1 vector incorporating an astrocyte-targeting P1 peptide and glial fibrillary acidic protein promoter was used to achieve dual-targeting of astrocytes and the glial scar while minimizing off-target *** results demonstrate that AAV9P1 provides high selectivity of astrocytes and reactive ***,neuronal reprogramming was induced by downregulating the polypyrimidine tract-binding protein 1 gene via systemic administration of AAV9P1 in a mouse model of traumatic brain *** summary,this approach provides an improved gene delivery vehicle to study neuronal programming and evidence of its applications for traumatic brain injury.

关键词： AAV9P1 astrocytes astrocyte-to-neuron conversion GFAP promoter glial scar induced neurons neuronal reprogramming P1 peptide PTBP1 traumatic brain injury

Variable solution structure can be helpful in evolutionary optimization

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2015年第11期58卷 145-161页

作者： QIAN Chao YU yang ZHOU Zhi-Hua National Key Laboratory for Novel Software Technology Nanjing University Collaborative Innovation Center of Novel Software Technology and Industrialization

Evolutionary algorithms are a family of powerful heuristic optimization algorithms where various representations have been used for solutions. Previous empirical studies have shown that for achieving a better efficiency of evolutionary optimization, it is often helpful to adopt rich representations(e.g., trees and graphs)rather than ordinary representations(e.g., binary coding). Such a recognition, however, has little theoretical justifications. In this paper, we present a running time analysis on genetic programming. In contrast to previous theoretical efforts focused on simple synthetic problems, we study two classical combinatorial problems, the maximum matching and the minimum spanning tree problems. Our theoretical analysis shows that evolving tree-structured solutions is much more efficient than evolving binary vector encoded solutions, which is also verified by experiments. The analysis discloses that variable solution structure might be helpful in evolutionary optimization when the solution complexity can be well controlled.

关键词： evolutionary algorithms genetic programming maximum matching minimum spanning tree running time computational complexity