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钟控序列用作A-CDmA系统扩频码的研究

电子与信息学报 2001年第2期23卷 112-117页

作者：饶妮妮刘聪电子科技大学自动化系成都610054 四川省教育管理信息中心成都610041

该文提出将钟控序列作为A-CDmA系统的一种新的和有潜在优势的扩频码。首先,基于一个A-CDmA模型,建立了平均误码率与PN(Pseudo Noise)序列互相关参数之间的关系。提出了PN序列用作A-CDmA扩频码应该具备的条件。接着,分析了钟控序列用作A-... 详细信息

该文提出将钟控序列作为A-CDmA系统的一种新的和有潜在优势的扩频码。首先,基于一个A-CDmA模型,建立了平均误码率与PN(Pseudo Noise)序列互相关参数之间的关系。提出了PN序列用作A-CDmA扩频码应该具备的条件。接着,分析了钟控序列用作A-CDmA系统扩频码的可行性。最后,数值结果比较了m序列和钟控序列的互相关特性以及它们对应的平均误码率。在同时工作的用户数不多于75的情况下,证实了钟控序列作为扩频码的可行性。

关键词： A-CDmA 钟控序列平均误码率扩频码

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西藏两栖爬行动物考察报告 2.墨脱

四川动物 2005年第3期24卷 250-253页

作者：赵文阁饶定齐吕顺清董丙君沈阳师范大学两栖爬行动物多样性研究课题组沈阳110034

2004年7月17日-8月20日,由沈阳师范大学组织、世界自然保护联盟中国两栖爬行动物专家组参与进行了西藏两栖爬行动物考察。本文简要报道墨脱队从派镇到62k的考察结果,本线路考察共采集到239份两栖爬行动物标本及一些蝌蚪,以及丰富的DNA... 详细信息

2004年7月17日-8月20日,由沈阳师范大学组织、世界自然保护联盟中国两栖爬行动物专家组参与进行了西藏两栖爬行动物考察。本文简要报道墨脱队从派镇到62k的考察结果,本线路考察共采集到239份两栖爬行动物标本及一些蝌蚪,以及丰富的DNA组织样品和影像图片资料。标本经鉴定隶属8科16属19种,其中有湍蛙属(Amolops)2新种,本文先介绍其鉴别特征,将另文详细描述。

关键词：两栖动物爬行动物西藏墨脱

静态顶空气相色谱法测定不同药用辅料中4种有机挥发性杂质

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药物分析杂志 2015年第11期35卷 2012-2017页

作者：吕尚魏惠珍饶毅罗晓健金浩鑫中药固体制剂制造技术国家工程研究中心南昌330006 江西中医药大学南昌330004

目的：建立气相色谱法,同时测定药用辅料中二氯甲烷、三氯甲烷、三氯乙烯、1,4-二氧杂环己烷4种挥发性有机杂质。方法：使用DB-WAX（30.0 m×250μm×0.25μm）弹性毛细管柱,进样口温度200℃,分流比10∶1,恒流流速1.0 m L·min-1,检测... 详细信息

目的：建立气相色谱法,同时测定药用辅料中二氯甲烷、三氯甲烷、三氯乙烯、1,4-二氧杂环己烷4种挥发性有机杂质。方法：使用DB-WAX（30.0 m×250μm×0.25μm）弹性毛细管柱,进样口温度200℃,分流比10∶1,恒流流速1.0 m L·min-1,检测口温度230℃,柱温为程序升温（起始温度35℃,保持5 min,8℃·min-1升至70℃,以50℃·min-1升至180℃）,顶空平衡温度140℃,时间30 min。结果：回收率：二氯甲烷100.3%~100.6%,三氯甲烷101.3%~101.8%,三氯乙烯100.9%~101.4%,1,4-二氧杂环己烷99.6%~100.1%;精密度的RSD：二氯甲烷1.65%,三氯甲烷2.25%,三氯乙烯2.00%,1,4-二氧杂环己烷1.55%。3种辅料中有机挥发性杂质检测结果：交联羧甲基纤维素钠中三氯甲烷质量分数为0.67~1.88μg·g-1,二氯甲烷、三氯乙烯及1,4-二氧杂环己烷未检出;微粉硅胶中二氯甲烷质量分数为1.12~3.25μg·g-1、三氯甲烷、三氯乙烯及1,4-二氧杂环己烷未检出;微晶纤维素中二氯甲烷质量分数为0.91~1.39μg·g-1,三氯甲烷质量分数为1.03~2.36μg·g-1,三氯乙烯质量分数为0.09~0.28μg·g-1,1,4-二氧杂环己烷未检出。结论：本法经方法学验证,适用于交联羧甲基纤维素钠、微粉硅胶及微晶纤维素中有机挥发性杂质的检测。

关键词：药用辅料交联羧甲基纤维素钠微粉硅胶微晶纤维素挥发性有机杂质二氯甲烷三氯甲烷三氯乙烯 1,4-二氧杂环己烷顶空气相色谱法

Characterization of Islets from Chronic Calcific Pancreatitis Patients of Tropical Region with Distinct Phenotype

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Advances in Bioscience and Biotechnology 2016年第1期7卷 1-10页

作者： P. Pavan Kumar m. Sasikala K. mamatha G. V. rao R. Pradeep R. Talukdar D. Nageshwar Reddy Asian Healthcare Foundation Hyderabad India Asian Institute of Gastroenterology Hyderabad India

Background and Objective: Islet autotransplantation is performed to preserve endocrine function in patients undergoing pancreatic resections for painful chronic pancreatitis. We characterized islets isolated from chronic pancreatitis patients (CP) of tropical region. Patients and methods: Pancreatic tissues were obtained from CP patients with and without diabetes undergoing pancreatic resections (n = 35) and brain-dead multi organ donors (n = 6;considered as controls). Islets isolated were assessed for yield, purity, viability and in vitro islet function (Glucose stimulated insulin release, GSIR) as per standard protocols. Results: Islets from CP patients without diabetes were similar to controls in yield (control 4120 - 6100 IE/g, CP 3550 - 5660 IE/g), purity (control 78% ± 12%, CP 70% ± 8.2%) and viability (control 85% ± 8%, CP 81% ± 10%) and islets from CP patients with diabetes showed decreases in yield (3002 - 2300 IE/g), purity (61% ± 16%) and viability (62% ± 21%). Islets measuring 50 - 200 μ were similar in abundance in controls (94.74% ± 3.2%) and CP patients with and without diabetes, 86.31% ± 4.9%, 91.03% ± 3.8%. GSIR of islets from CP patients and controls were similar at 5.5 mm glucose (2.8 - 3.1 μu/ml). However, GSIR at 16.5 mm glucose was decreased in CP patients (control 18.5 ± 0.6, CP without diabetes 11.8 ± 0.3, CP with diabetes 4.3 ± 0.3 μu/ml). Conclusion: Our results demonstrate suitability of islets isolated from CP patients of tropical region for autotransplantation.

关键词： Islets Tropical Chronic Pancreatitis Islet Functions Transplantation

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圆屋附近大气折射率结构常数的空间分布

强激光与粒子束 2008年第7期20卷 1079-1083页

作者：吕炜煜姚东升朱文越苑克娥郝磊饶瑞中中国科学院安徽光学精密机械研究所合肥230031 西北核技术研究所西安710024

通过两点温度脉动法,测量了孤立建筑物圆屋附近不同位置的折射率结构常数,对比分析了气象塔8.0,6.0 m高度处的折射率结构常数。结果表明:圆屋附近8.2,8.5,9.0 m高度处的折射率结构常数要比非圆屋附近同高度的结果大;距离圆屋等距离垂直... 详细信息

通过两点温度脉动法,测量了孤立建筑物圆屋附近不同位置的折射率结构常数,对比分析了气象塔8.0,6.0 m高度处的折射率结构常数。结果表明:圆屋附近8.2,8.5,9.0 m高度处的折射率结构常数要比非圆屋附近同高度的结果大;距离圆屋等距离垂直方向的折射率结构常数大于水平方向的测量结果;因此将圆屋附近认为是近地面的假设不成立;圆屋附近温度谱幂率基本符合"-5/3"定律。

关键词：大气湍流折射率结构常数圆屋等效相干长度

Nucleotide Sequencing and Phylogenetic Analysis using PCR Amplicons of u3 Gene of Jaagsiekte Sheep Retrovirus (JSRV) Detected in Natural Cases of Ovine Pulmonary Adenocarcinoma in India

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Open Journal of Veterinary medicine 2014年第11期4卷 267-275页

作者： Vemuri Rama Devi Egi Janardhan Yadav Tumati Sreenivasa rao Kokila Satheesh Paila Suresh Betala Baby manasa Department of Veterinary Pathology N.T.R. College of Veterinary Science Gannavaram India Department of Veterinary Public Health N.T.R. College of Veterinary Science Gannavaram India

Ovine pulmonary adenocarcinoma (OPA) caused by an exogenous Jaagsiekte sheep retrovirus (JSRV) is prevalent in Indian sheep. In the present study, OPA was diagnosed in sheep by clinical signs, gross and histopathology and polymerase chain reaction (PCR). Proviral DNA of exogenous JSRV was detected in lung tumor tissues, mediastinal lymph nodes, blood and lung fluid samples from natural cases of OPA by using u3-hn PCR and the PCR amplicons were sequenced to analyze nucleotide divergence. In total, six isolates were sequenced that had 96% - 100% homology with a uK strain (AF105220.1) but more divergent from a South African strain (m80216) with 88% - 93% identity. The phylogenetic analysis revealed segregation of the six isolates into two clusters. In conclusion, this study is the first report on sequencing and phylogenetic analysis of JSRV in India and further studies are suggested to know the complete sequencing and genetic divergence of JSRV in Indian sheep.

关键词： OPA JSRV Sequencing Phylogenesis India

Statistical design and evaluation of a propranolol HCl gastric floating tablet

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Acta Pharmaceutica Sinica B 2012年第1期2卷 60-69页

作者： meka Venkata Srikanth Nali Sreenivasa rao Songa Ambedkar Sunil Battu Janaki Ram Venkata Ramana murthy Kolapalli A.u.college of pharmaceutical sciences andhra universityvisakhapatnam 530003india

The purpose of this research was to apply statistical design for the preparation of a gastric floating tablet(GFT)of propranolol HCl and to investigate the effect of formulation variables on drug release and the buoyancy properties of the delivery *** contents of polyethylene oxide(PEO)WSR coagulant and sodium bicarbonate were used as independent variables in central composite design of the best *** effects and interaction terms of the formulation variables were evaluated quantitatively using a mathematical model approach showing that both independent variables have significant effects on floating lag time,%drug release at 1 h(D_(1h))and time required to release 90%of the drug(t_(90)).The desired function was used to optimize the response variables,each with a different target,and the observed responses were in good agreement with the experimental *** and DSC studies of the statistically optimized formulation revealed there was no chemical interaction between drug and *** statistically optimized formulation released drug according to first order kinetics with a non-Fickian diffusion *** of the optimized formulation in vivo in human volunteers showed that the GFT was buoyant in gastric fluid and that its gastric residence time was enhanced in the fed but not the fasted state.

关键词： Gastric floating tablet Propranolol HCl Central composite design Buoyancy Dissolution

飞秒激光双光子聚合技术的发展及其在功能性微纳器件制备上的应用(特邀)

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光学学报 2024年第17期44卷 183-196页

作者：饶晓旭张润民吴昊吴东中国科学技术大学精密机械与精密仪器系安徽合肥230026

随着微纳加工技术在各领域的广泛应用,飞秒激光加工因其独特的优势,特别是在制备小尺寸、高精度以及真三维结构方面的卓越表现,而备受瞩目。本文首先对飞秒激光双光子聚合的加工原理进行了深入探讨,重点包括双光子非线性吸收和阈值效应... 详细信息

随着微纳加工技术在各领域的广泛应用,飞秒激光加工因其独特的优势,特别是在制备小尺寸、高精度以及真三维结构方面的卓越表现,而备受瞩目。本文首先对飞秒激光双光子聚合的加工原理进行了深入探讨,重点包括双光子非线性吸收和阈值效应。随后,介绍了光场调制技术,该技术能够将单一焦点转化为多焦点阵列、面光场或体光场,从而实现对特定结构的快速曝光,为复杂耗时结构的加工提供灵活高效的解决方案。接着,详细阐述了飞秒激光加工在微机器人、微光学器件、手性光学以及生物医学等多个领域的应用。这些案例展示了飞秒激光加工技术的广泛适用性,以及在推动相关领域发展方面所起到的重要作用。最后,对目前超快激光加工所面临的挑战进行了分析,并对未来的发展趋势进行了展望。

关键词：激光光学飞秒激光微纳加工双光子聚合

Advancing thermoelectrics by suppressing deep-level defects in Pb-doped AgCrSe_(2) alloys

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Chinese Physics B 2023年第4期32卷 598-604页

作者：王亚东张富界饶旭日冯皓然林黎蔚任丁刘波昂然 Key Laboratory of Radiation Physics and Technology Ministry of EducationInstitute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610065China

AgCrSe2-based compounds have attracted much attention as an environmentally friendly thermoelectric material in recent years due to the intriguing liquid-like ***,the ultra-low carrier concentration and the high Ag_(Cr)deep-level defects limit the overall thermoelectric ***,we successfully introduced Pb into Ag-deficient Ag_(0.97)CrSe_(2) alloys to tune the carrier concentration across a broad temperature *** Pb^(2+) as an acceptor dopant preferentially occupies Cr sites,boosting the hole carrier concentration to 1.77×10^(19) cm^(-3) at room ***,the Pb strongly inhibits the creation of intrinsic Ag_(Cr) defects,weakens the increased thermal excited ionization with the increasing temperature and slowed the rising trend of the carrier *** designed carrier concentration matches the theoretically predicted optimized one over the entire temperature range,leading to a remarkable enhancement in power factor,especially the maximum power factor of ~500 μW·m^(-1)·K^(-2) at 750 K is superior to most previous ***,the abundant point defects promote phonon scattering,thus reducing the lattice thermal *** a result,the maximum figure of merit zT(~0.51 at 750 K) is achieved in Ag_(0.97)Cr_(0.995)Pb_(0.005)Se_(2).This work confirms the feasibility of manipulating deep-level defects to achieve temperature-dependent optimal carrier concentration and provides a valuable guidance for other thermoelectric materials.

关键词： AgCrSe2 deep-level defects carrier concentration modulation thermoelectric properties