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1纳米多级孔分子筛:简短的综述(英文)显示文摘分子筛是一种三维微孔结构的硅铝酸盐晶体,具有灵活多变的骨架和组成、较高的物理和水热稳定性、无毒、高比表面积、离子可交换性以及很低的成本等特点,因而在油品精制、石油化学、农业、水和污水处理等众多领域中用作离子交换剂、催化剂和吸附剂.尽管分子筛的应用是基于其本身的微孔结构,但微孔也导致体积较大的反应物和产物分子的传质阻力高.通过制备纳米尺度和多级孔结构的分子筛等多种手段可克服常规分子筛所具有的传质限制.人们已经开发了多种方法制备了新型的分子筛材料,并考察了它们在各种催化反应和吸附反应中的性能.在反应体系中采用这种多级孔的纳米分子筛,有可能提高催化剂的使用寿命和催化性能,抑制积碳和失活.本综述概述了多级孔分子筛和纳米分子筛的高性能及其合成方法的最新进展,讨论了每个合成方法的优缺点,简述了纳米分子筛和二级孔结构分子筛的催化应用,并与常规分子筛进行了比较.Esmat Koohsaryan Mansoor Anbia 2016Chinese Journal of Catalysis2016,37,4:31
2基于直流侧电压周期离散控制的单相并联有源滤波器显示文摘针对有源滤波器电流谐波分量检测运算复杂,且在负荷电流变化时出现电源电流畸变现象,从直流侧电容电压与交、直流侧功率传递的关系出发,并结合有功电流的周期性特点,提出了基于直流侧电容电压周期离散控制的新型有源滤波器控制方法。该方法以电网电压为同步信号,在电网电压信号的过零点采样直流侧电容电压,并通过周期离散控制可以获得负荷电流有功分量。采用该周期离散控制方法可实现对直流侧电容电压的线性化控制,并使有源滤波器对谐波的补偿是瞬时的。该文给出了单相并联有源滤波器的直流侧模型,基于该模型推导出周期离散控制方法。以该方法研制了10kVA有源滤波器样机,仿真和实验结果表明该方法控制简单,稳定性好,谐波补偿速度快,能够有效地避免负荷变化时的电流畸变现象。纪飞峰 Mansoor 解大 姚钢 周荔丹 陈陈 舒晓琼 2005中国电机工程学报2005,25,20:18
3Ruptured hepatocellular carcinoma following chemoembolization:a western experience显示文摘BACKGROUND: Transcatheter arterial chemoembolization (TACE) is a recommended first line therapy for unresectable hepatocellular carcinoma (HCC). Serious complications such as neutropenic sepsis and hepatic decompensation are well known, but rupture of HCC following TACE is a rare and potentially fatal complication. The aim of this study was to identify the incidence of ruptured HCC following TACE and the associated risk factors. METHODS: A retrospective analysis was performed using our liver database with 'chemoembolization', 'ruptured HCC' covering the patients who received chemoembolization from January 1995 to December 2005. There were no exclusions. RESULTS: A total of 294 patients received chemoemboliza- tion in 530 sessions during the 10-year period. Of these, 2 ruptured following treatment (incidence 0.68%). The mean age was 65 years and the interval between the treatment and rupture was 2 and 24 days. The common factors were male sex, large tumor size (range 11-13 cm), and exophytic tumor growth. One patient died 2 days after rupture with hepatic decompensation while the second is alive after a 6-month follow up without tumor recurrence. CONCLUSIONS: Ruptured HCC following TACE is a rare but serious complication. Large tumor size, male sex, and exophytic growth of tumor may be predisposing factors for rupture.Narendra Battula Parthi Srinivasan Mansoor Madanur Srinivas Prabhu Chava Oliver Priest Mohamed Rela Nigel Heaton 2007Hepatobiliary & Pancreatic Diseases International2007,6,1:17
4基于变压器辅助换流的新型ZVS-ZCS逆变器显示文摘辅助谐振换流逆变器拓扑结构中存在着诸如由辅助换流回路损耗引起的转换效率低、由负荷电流变化引起的变辅助换流周期和稳定性差等问题,为此提出了一种基于变压器辅助换流的新型ZVS-ZCS逆变器。该新型逆变器通过引入(1-k)Vdc参与谐振、固定换流时间控制策略和辅助换流开关的保护等措施,大大提高该拓扑结构的运行性能和应用范围。文中在通过分析、仿真和实验的基础上得到了该新型ZVS-ZCS逆变器的可行性方案,并指出了其在DFACTS技术领域的应用场合。姚钢 Mahammad Mansoor Khan 周荔丹 纪飞峰 陈陈 2006中国电机工程学报2006,26,6:13
5Retrospective study on mixed neuroendocrine non-neuroendocrine neoplasms from five European centres显示文摘BACKGROUND Mixed neuroendocrine non-neuroendocrine neoplasm(MiNEN)is a rare diagnosis,mainly encountered in the gastro-entero-pancreatic tract.There is limited knowledge of its epidemiology,prognosis and biology,and the best management for affected patients is still to be defined.AIM To investigate clinical-pathological characteristics,treatment modalities and survival outcomes of a retrospective cohort of patients with a diagnosis of MiNEN.METHODS Consecutive patients with a histologically proven diagnosis of MiNEN were identified at 5 European centres.Patient data were retrospectively collected from medical records.Pathological samples were reviewed to ascertain compliance with the 2017 World Health Organisation definition of MiNEN.Tumour responses to systemic treatment were assessed according to the Response Evaluation Criteria in Solid Tumours 1.1.Kaplan-Meier analysis was applied to estimate survival outcomes.Associations between clinical-pathological characteristics and survival outcomes were explored using Log-rank test for equality of survivors functions(univariate)and Cox-regression analysis(multivariable).RESULTS Sixty-nine consecutive patients identified;Median age at diagnosis:64 years.Males:63.8%.Localised disease(curable):53.6%.Commonest sites of origin:colon-rectum(43.5%)and oesophagus/oesophagogastric junction(15.9%).The neuroendocrine component was;predominant in 58.6%,poorly differentiated in 86.3%,and large cell in 81.25%,of cases analysed.Most distant metastases analysed(73.4%)were occupied only by a poorly differentiated neuroendocrine component.Ninety-four percent of patients with localised disease underwent curative surgery;53%also received perioperative treatment,most often in line with protocols for adenocarcinomas from the same sites of origin.Chemotherapy was offered to most patients(68.1%)with advanced disease,and followed protocols for pure neuroendocrine carcinomas or adenocarcinomas in equal proportion.In localised cases,median recurrence free survival(RFS);14.0 months(95%CI:9.2-24.4),and median overall survival(OS):28.6 months(95%CI:18.3-41.1).On univariate analysis,receipt of perioperative treatment(vs surgery alone)did not improve RFS(P=0.375),or OS(P=0.240).In advanced cases,median progression free survival(PFS);5.6 months(95%CI:4.4-7.4),and median OS;9.0 months(95%CI:5.2-13.4).On univariate analysis,receipt of palliative active treatment(vs best supportive care)prolonged PFS and OS(both,P<0.001).CONCLUSION MiNEN is most commonly driven by a poorly differentiated neuroendocrine component,and has poor prognosis.Advances in its biological understanding are needed to identify effective treatments and improve patient outcomes.Melissa Frizziero Xin Wang Bipasha Chakrabarty Alexa Childs Tu V Luong Thomas Walter Mohid S Khan Meleri Morgan Adam Christian Mona Elshafie Tahir Shah Annamaria Minicozzi Wasat Mansoor Tim Meyer Angela Lamarca Richard A Hubner Juan W Valle Mairéad G McNamara 2019World Journal of Gastroenterology2019,25,39:13
6Numerical Simulation of Direct-contact Condensation from a Supersonic Steam Jet in Subcooled Water显示文摘直接接触的冷凝作用的现象,在驾驶的蒸气使用喷气注射者,核反应堆紧急情况核心冷却系统和直接接触的热 exchangers,被在使过冷的水里为蒸气的直接接触的冷凝作用介绍一个热平衡模型计算地调查。介绍的冷凝作用模型是在接口的双方上照顾热转移过程并且使用一条可变蒸气水泡直径的二个抵抗模型。在使过冷的水坦克的超声的蒸气喷气的注射用 Euler-Euler 多相的流动模型被模仿流畅与冷凝作用模型一起的 6.3 代码合并了。模拟与出版试验性的数据和相当好的同意相比的计算液体动力学(CFD ) 的调查结果被观察在之间二,因此验证冷凝作用模型。为羽毛从 2.73-7.33 改变的蒸气的无尺寸的穿入长度的 CFD 模拟的结果,当冷凝作用热转移系数从 0.75-0.917 MW 汯敹桴牥?晬湯 ? 变化时 ???? 琠楲敭潳汹??Ajmal Shah Imran Rafiq Chughtai Mansoor Hameed Inayat 2010Chinese Journal of Chemical Engineering2010,18,4:13
7Epirubicin, oxaliplatin, and capecitabine with or without panitumumab for patients with previously untreated advanced oesophagogastric cancer (REAL3): a randomised, open-label phase 3 trial显示文摘Tom Waddell Ian Chau David Cunningham David Gonzalez Alicia Frances Clare Okines Andrew Wotherspoon Claire Saffery Gary Middleton Jonathan Wadsley David Ferry Wasat Mansoor Tom Crosby Fareeda Coxon David Smith Justin Waters Timothy Iveson Stephen Falk Sar 2013Lancet Oncology2013,,6:10
8Characterisation and risk assessment of venous thromboembolism in gastrointestinal cancers显示文摘AIM To characterise venous thromboembolism(VTE) in gastrointestinal cancer and assess the clinical utility of risk stratification scoring. METHODS We performed a retrospective analysis using electronic patient records of 910 gastro-oesophageal(GO) cancer and 1299 colorectal cancer(CRC) patients referred to a tertiary cancer centre to identify the incidence of VTE, its relationship to chemotherapy and impact on survival.VTE risk scores were calculated using the Khorana index. Patients were classified as low risk(0 points), intermediate risk(1 to 2 points) or high risk(3 points). Data was analysed to determine the sensitivity of the Khorana score to predict VTE. RESULTS The incidence of VTE was 8.9% for CRC patients and 9.7% for GO cancer patients. Pulmonary emboli(PE) were more common in advanced than in localised CRC(50% vs 21% of events respectively) and lower limb deep vein thrombosis(DVT) were more common in localised than in advanced CRC(62% vs 39% of events respectively). The median time to VTE from cancer diagnosis was 8.3 mo for CRC patients compared to 6.7 mo in GO cancer. In localised CRC median time to VTE was 7.1 mo compared with 10.1 mo in advanced CRC. In contrast in GO cancer, the median time to VTE was 12.5 mo in localised disease and 6.8 mo in advanced disease. No survival difference was seen between patients with and without VTE in this cohort. The majority of patients with CRC in whom VTE was diagnosed had low or intermediate Khorana risk score(94% for localised and 97% in advanced CRC). In GO cancer, all patients scored either intermediate or high risk due to the primary site demonstrating a limitation of the risk assessment score in discriminating high and low risk patients with GO cancers. Additional risk factors were identified in this cohort including surgery, chemotherapy or hospital admission. Overall, 81% of patients with CRC and 77% of patients with GO cancer had one or more of these factors within 4 wk prior to diagnosis VTE. These should be factored into clinical risk assessment scores. CONCLUSION The Khorana score has low sensitivity for thrombotic events in CRC and cannot discriminate low risk patients in high risk cancer sites such as GO cancer.Robert L Metcalf Eamon Al-Hadithi Nicholas Hopley Thomas Henry Clare Hodgson Antony McGurk Wasat Mansoor Jurjees Hasan 2017World Journal of Gastrointestinal Oncology2017,9,9:10
9case of familial hyperlipoproteinemia type Ⅲ hypertriglyceridemia induced acute pancreatitis: role for outpatient apheresis maintenance therapy显示文摘Hypertriglyceridemic pancreatitis(HTGP) accounts for up to 10% of acute pancreatitis presentations in nonpregnant individuals and is the third most common cause of acute pancreatitis after alcohol and gallstones. There are a number of retrospective studies and case reports that have suggested a role for apheresis and insulin infusion in the acute inpatient setting. We report a case of HTGP in a male with hyperlipoproteinemia type Ⅲ who was treated successfully with insulin and apheresis on the initial inpatient presentation followed by bi-monthly outpatient maintenance apheresis sessions for the prevention of recurrent HTGP. We also reviewed the literature for the different inpatient and outpatient management modalities of HTGP. Given that there are no guidelines or randomized clinical trials that evaluate the outpatient management of HTGP, this case report may provide insight into a possible role for outpatient apheresis maintenance therapy.Mohannad Abou Saleh Emad Mansoor Gregory S Cooper 2017World Journal of Gastroenterology2017,23,40:10
10Pseudoaneurysm following laparoscopic cholecystectomy显示文摘BACKGROUND:Laparoscopic cholecystectomy(LC)is the operation of choice for removal of the gallbladder. Unrecognized bile duct injuries present with biliary peritonitis and systemic sepsis.Bile has been shown to cause damage to the vascular wall and therefore delay the healing of injured arteries leading to pseudoaneurysm formation.Failure to deal with bile leak and secondary infection may result in pseudoaneurysm formation. This study was to report the incidence and outcomes of pseudoaneurysm in patients with bile leak following LC referred to our hospital. METHODS:A retrospective analysis of our prospectively maintained liver database using pseudoaneurysm, bile leak and bile duct injury following laparoscopic cholecystectomy from January 2000 to December 2005 was performed. RESULTS:A total of 86 cases were referred with bile duct injury and bile leak following LC and of these,4 patients (4.5%)developed hepatic artery pseudoaneurysm(HAP) presenting with haemobilia in 3 and massive intra- abdominal bleed in 1.Selective visceral angiography confirmed pseudoaneurysm of the right hepatic artery in 2 cases,cystic artery stump in one and an intact but ectatic hepatic artery with surgical clips closely applied to the right hepatic artery at the origin of the cystic artery in the fourth case.Effective hemostasis was achieved in 3 patients with coil embolization and the fourth patient required emergency laparotomy for severe bleeding and hemodynamic instability due to a ruptured right hepatic artery.Of the 3 patients treated with coil embolization, 2 developed late strictures of the common hepatic duct. . (CHD)requiring hepatico-jejunostomy and one developed a stricture of left hepatic duct.All the 4 patients are alive at a median follow up of 17 months(range 1 to 65)with normal liver function tests. CONCLUSIONS:HAP is a rare and potentially life- threatening complication of LC.Biloma and subsequent infection are reported to be associated with pseudoaneurysm formation.Late duct stricture is common either due to unrecognized injury at LC or secondary to ischemia after embolization.Mansoor Ahmed Madanur Narendra Battula Harsheet Sethi Rahul Deshpande Nigel Heaton Mohamed Rela 2007Hepatobiliary & Pancreatic Diseases International2007,6,3:8
11有源电力滤波器与直流偏磁式静止无功补偿器综合补偿系统的研究显示文摘针对供、配电站需要对谐波和无功进行综合治理,提出一种新型的有源电力滤波器与直流偏磁式静止无功补偿器构成的综合补偿系统。该系统中有源滤波器与无源滤波器构成新型的混合滤波器,能够同时补偿谐波电流并提供容性基波无功电流,而直流偏磁式静止无功补偿器采用新型的PWM整流器产生控制直流,可快速地提供感性无功电流。该系统采用新颖的拓扑结构,功率器件工作于低压侧,有效地降低有源滤波器和无功补偿器中功率器件的容量。文中介绍了该系统的结构和补偿原理,采用电磁暂态仿真软件PSCAD/EMTDC进行的仿真表明该综合补偿系统能同时补偿谐波与无功电流,并能抑制可能产生的谐振现象,具有较好的补偿效果。纪飞峰 Mansoor 解大 陈陈 2006中国电机工程学报2006,26,18:8
12应用数字信号处理器的基波相位和频率校正检测方法显示文摘提出了一种基于数字信号处理器的基波相位和频率校正检测方法,可用于电力系统中电压或电流基波分量同步信号的获取。输入信号经模/数(A/D)转换后通过频率校正环节可得到与输入信号基波分量相同角频率的信号,该信号再经初相校正环节后就可得到与输入信号基波分量同频率同初相的相位信号,从而实现对输入信号中基波分量的跟踪。该方法在一个采样周期内分别计算输入信号中基波分量的频率和相位及它们与标准信号的误差,而不需要闭环反馈,显著提高了跟踪速度,由于频率校正环节和相位校正环节的结构相同,又简化了编程。仿真和实验结果表明该检测方法不受谐波影响,跟踪精度较高,暂态响应时间小于20ms。纪飞峰 Muhammad Mansoor Khan 解大 陈陈 2005电网技术2005,29,24:6
13Structural, morphological, Raman, optical, magnetic, and antibacterial characteristics of CeO2 nanostructures显示文摘In this study, CeO_2 nanostructures were synthesized by a soft chemical method. A hydrothermal treatment was observed to lead to an interesting morphological transformation of the nanoparticles into homogeneous microspheres composed of nanosheets with an average thickness of 40 nm. Structural analysis revealed the formation of a single-phase cubic fluorite structure of CeO_2 for both samples. A Raman spectroscopic study confirmed the XRD results and furthermore indicated the presence of a large number of oxygen vacancies in the nanosheets. These oxygen vacancies led to room-temperature ferromagnetism(RTFM) of the CeO_2 nanosheets with enhanced magnetic characteristics. Amazingly, the nanosheets exhibited substantially greater antibacterial activity than the nanoparticles. This greater antibacterial activity was attributed to greater exposure of high-surface-energy polar surfaces and to the presence of oxygen vacancies.Fazal Abbas Javed Iqbal Tariq Jan Noor Badshah Qaisar Mansoor Muhammad Ismail 2016International Journal of Minerals,Metallurgy and Materials2016,23,1:6
14Incidence and risk factors of retinopathy of prematurity and utility of the national screening criteria in a tertiary center in Iran显示文摘AIM: To determine the incidence and risk factors of retinopathy of prematurity(ROP) and the sensitivity of current screening criteria in a tertiary eye center in Tehran, Iran. METHODS: In a cross-sectional observational study, neonates weighing ≤2000 grams at birth or born <34 wk gestational age(GA) and all other infants at risk of ROP admitted to the neonatal intensive care unit(NICU) or referred to our ROP clinic were investigated. The incidence of ROP and severe ROP(i.e. patients needing treatment) were determined. The associations between risk factors and the development and severity of ROP were assessed. We also examined the sensitivity of the current national screening guideline in Iran. RESULTS: Among 207 infants, the incidence of ROP and severe ROP was 33.3% and 11.1%, respectively. Mean GA and birth weight(BW) were significantly lower in ROP vs non-ROP infants(29±2 wk vs 33±3 wk, P<0.001;1274±489 g vs 1916±550 g, P<0.001, respectively). Univariate analysis displayed significant association between ROP incidence and GA, BW, NICU admission period, blood transfusion, surfactant usage, sepsis, intraventricular hemorrhage and patent ductus arteriosus(P<0.05 for all). BW [relative risk(RR): 0.857(0.711-0.873), P<0.001], GA [RR: 0.788(0.711-0.873), P<0.001] and blood transfusion [RR: 1.888(0.995-3.583), P=0.052] were independent ROP risk factors. The sensitivity of country-specific screening guidelines was 95.7% and 100% for overall and severe ROP detection, respectively. CONCLUSION: ROP incidence is relatively high in Iran. Identifying ROP risk factors results in more accurate screening and reduces the risk of irreversible vision loss. The ROP screening criteria utilized in Iran are efficient at the present time.Milad Khorshidifar Homayoun Nikkhah Alireza Ramezani Morteza Entezari NarsisDaftarian Hamid Norouzi Mansoor Shahiari Mitra Radfar Ramin Norinia Saeed Karimi 2019International Journal of Ophthalmology(English edition)2019,12,8:6
15Epidemiology of civilian blast injuries inflicted by terrorist bombings from 1970-2016显示文摘An upsurge of terrorist activity has occurred in the past two decades. As part of this, explosive devices continue to be extensively deployed against civilians in wide-ranging environments. Bombings remain the leading worldwide cause of civilian fatalities due to terrorism. This demands an understanding of modern terrorist bombing trends to inform mitigation strategy. The objective of this study was to identify the occurrence and severity of bombings against civilian targets in diverse attack settings, and to establish corresponding blast injury profiles. Data was obtained from analysis of the Global Terrorism Database(GTD) and a meta-analysis of blast injury data derived from the PubMed database. Closed environment explosions were associated with significantly greater(p<0.05) mortality than in open spaces. The injury profiles were found to be influenced by attack setting, with higher rates of primary injury on trains and buses, and secondary injury in open space.Danyal Magnus Mansoor A.Khan William G.Proud 2018Defence Technology(防务技术)2018,14,5:6
16Mechanisms of High Coercivity in Ni/NiO Composite Films by Post Annealing显示文摘A coercivity as large as 2.4 kOe has been achieved in the Ni/NiO composite film after an annealing under a magnetic field of 10 kOe and an O_2 partial pressure of 0.001 torr.The coercivity was attributed to the strong exchange coupling of Ni and NiO.Small grain size of Ni and NiO was observed after the post-annealing.The enhanced coercivity is probably associated with the domain wall pinning by local energy minima,the distribution of Ni and NiO,and the domain structure in the interface of Ni/NiO generated under the presence of the magnetic field during the post-annealing.J.B. Yi J. Ding Mansoor Bin Abdul Jalil B.H. Liu S. Thongmee J.H. Yin Z.L. Zhao 2007材料科学与工程学报2007,25,6:5
17Evaluation of potential RNA-interference-target genes to control cotton mealybug, Phenacoccus solenopsis (Hemiptera: Pseudococcuidae)显示文摘Arif M. Khan Muhammad Ashfaq Azhar A. Khan Muhammad T. Naseem Shahid Mansoor 2018Insect Science2018,25,5:5
18Humidity sensing properties of Ce-doped nanoporous ZnO thin film prepared by sol-gel method显示文摘The humidity sensitive characteristics of the sensor fabricated from Ce-doped nanoporous ZnO by screen-printing on the alumina substrate with Ag-Pd interdigital electrodes were investigated at different sintering temperatures.The nanoporous thin films were prepared by sol-gel technique.It was found that the impedance of the sensor sintered at 600 oC changed more than four order of magnitude in the relative humidity(RH) range of 11%-95% at 25 oC.The response and recovery time of the sensor were about 13 and 17 s,respectively.The sensor showed high humidity sensitivity,rapid response and recovery,prominent stability,good repeatability and narrow hysteresis loop.These re-sults indicated that Ce-doped nanoporous ZnO thin films can be used in fabricating high-performance humidity sensors.Mansoor Anbia Seyyed Ebrahim Moosavi Fard 2012Journal of Rare Earths2012,30,1:5
19Synthesis of nanoporous copper terephthalate [MIL-53(Cu)] as a novel methane-storage adsorbent显示文摘Copper (Ⅱ) dicarboxylate, MIL-53, metal-organic framework synthesized hydrothermally has been used for the first time as an adsorbent for methane gas adsorption. Methane adsorption capacity of MIL-53(Cu) was increased to about 8.52 mmol g-1 at 298 K and 35 bar for methane storage. The adsorbent was characterized by X-ray diffraction (XRD), Brunauer-Emmet-Teller (BET) method, Fourier transform infrared (FT-IR), thermo gravimetric analysis (TGA) and scanning electron microscopy (SEM). The adsorption property of CH 4 , on MIL-53(Cu) was investigated by volumetric measurement. The enhancement of CH 4 adsorption capacity of MIL-53(Cu) is attributed to the increase of micropore volume of MIL-53(Cu).Mansoor Anbia Sara Sheykhi 2012Journal of Natural Gas Chemistry2012,21,6:5
20高速1550 nm垂直腔面发射激光器研究进展显示文摘垂直腔面发射激光器(VCSEL)具有生产成本低、调制速率高等优点,在光通信领域占有重要地位。随着数据需求量的飞速增长,在长距离信息传输中,具有低损耗的1550 nm波长的VCSEL引起了研究人员的兴趣。本文首先介绍了1550 nm VCSEL的结构,然后讨论了其带宽限制因素以及相应的改进方法,接着从NRZ(不归零)调制和PAM4(四电平脉冲幅度)调制两方面对近年来高速1550 nm VCSEL的研究进展进行了综述,最后展望了高速1550 nm VCSEL在未来光通信领域的发展和应用。韩赛一 田思聪 徐汉阳 潘绍驰 MANSOOR Ahamed 佟存柱 王立军 BIMBERG Dieter 李充 2022发光学报2022,43,5:4
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