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| 1 | 全球生态系统服务与自然资本的价值估算显示文摘编者按:地球上的生态系统是一种复杂的生命支持系统,生态系统对人类的贡献,在生态学研究中经常用“社会效益和经济效益”来表述,是可以用经济价值来估算的。然而,由于其复杂性和不确定性,对这两个效益如何进行估价,一直是困扰生态学家和经济学家的重要问题。Cos... | Robert Costanza Ralph d'Arge Rudolf de Groot Stephen Farber Monica Grasso Bruce Hannon Karin Limburg Shahid Naeem Robert V.O'neill Jose Paruelo Robert G.Raskin Paul Sutton Marjan van den Belt 陶大立(译) | 1999 | 生态学杂志1999，18，2： | 38 |
| 2 | On-road pollutant emission and fuel consumption characteristics of buses in Beijing显示文摘On-road emission and fuel consumption (FC) levels for Euro III and IV buses fueled on diesel and compressed natural gas (CNG) were compared,and emission and FC characteristics of buses were analyzed based on approximately 28,700 groups of instantaneous data obtained in Beijing using a portable emissions measurement system (PEMS).The experimental results revealed that NOx and PM emissions from CNG buses were decreased by 72.0% and 82.3% respectively,compared with Euro IV diesel buses.Similarly,these emissions were reduced by 75.2% and 96.3% respectively,compared with Euro III diesel buses.In addition,CO 2,CO,HC,NOx,PM emissions and FC of Euro IV diesel buses were reduced by 26.4%,75.2%,73.6%,11.4%,79.1%,and 26.0%,respectively,relative to Euro III diesel buses.The CO 2,CO,HC,NOx,PM emissions and FC factors all decreased with bus speed increased,while increased as bus acceleration increased.At the same time,the emission/FC rates as well as the emission/FC factors exhibited a strong positive correlation with the vehicle specific power (VSP).They all were the lowest when VSP < 0,and then rapidly increased as VSP increased.Furthermore,both the emission/FC rates and emission/FC factors were the highest at accelerations,higher at cruise speeds,and the lowest at decelerations for non-idling buses.These results can provide a base reference to further estimate bus emission and FC inventories in Beijing. | Aijuan Wang Yunshan Ge Jianwei Tan Mingliang Fu Asad Naeem Shah Yan Ding Hong Zhao Bin Liang | 2011 | Journal of Environmental Sciences2011，23，3： | 19 |
| 3 | 不同雨强、坡度对秸秆覆盖保持水土效果的影响显示文摘利用室内人工模拟降雨试验,研究了4种设计雨强(33,54,94,125mm/h)、3种设计坡度(5°,10°,25°)在覆盖条件下对紫色土坡面初始产流时间、覆盖保水率和保沙率的影响。结果表明:覆盖条件下初始产流时间相比裸地均有一定的滞后效果,且其初始产流的滞后时间随坡度、雨强的增加而减少。当坡度增大至25°,雨强在94mm/h以上时,其滞后时间逐渐趋于稳定,在1.61~2.84min范围内波动。雨强是影响秸秆覆盖保持水土作用的重要因子,与覆盖保水率、保沙率均在0.01水平上呈显著负相关,且在不同坡度条件下均可以用抛物线进行很好的描述。不同坡度条件下,覆盖的保水率随雨强的增加逐渐下降至14.5%,而其保沙率则只下降至92.25%,相比覆盖的保水作用,其保沙作用更加明显。覆盖条件下,坡度对坡面产流及产沙的贡献率均大于50%,坡度对秸秆覆盖保持水土的作用影响很大。坡度对坡面侵蚀的贡献率在裸地和覆盖条件下均随雨强的增加而呈现减小的趋势,且在相同雨强下,坡度的贡献率在覆盖条件下均大于裸地,在大雨强下(94mm/h和125mm/h)差异明显。 | 车明轩 宫渊波 Muhammad Naeem Khan 陈兆利 曾倩 兰依依 | 2016 | 水土保持学报2016，30，2： | 17 |
| 4 | Enhanced biological nutrient removal by the alliance of a heterotrophic nitrifying strain with a nitrogen removing ecosystem显示文摘从合成废水的氮移动在一个空运生物反应器(白长袍的) 被调查,在器官的碳下面与新奇不是自养的硝化细菌 Pseudonocardia ammonioxydans H9T 扩充了到从 0 ~ 12 的氮比率(Corg/N ) 。接种紧张的效果也在安定性质和化学的氧需求(货到付款) 的移动上被决定。二个实验室规模反应堆被设置完成在水力的保留的一样的物理化学的条件下面使状态硝化的一个马厩时间(HRT ) ,温度, pH 和溶解的氧() ,并且在定序的批模式下面操作了。水平在 0.5 1.5 mg/L 被保留由周期激动人心并且通风。每特定的 Corg/N 比率为 3 个星期的持续时间被继续。反应堆(BR2 ) 之一与 P 被接种。ammonioxydans H9T 周期性地在每 Corg/N 比率的开始。污泥容量的索引(SVI ) 与增加的 Corg/N 比率改善了,但是没有重要差别在二个反应堆之间被检测。BR2 与增加显示出氮移动的高水平不是自养的条件,和氨移动到达了到水平 82%88% ,在在在比 6 高的 Corg/N 比率的控制反应堆(BR1 ) 的比那高的 to10% 上面;然而,在试验性的反应堆的氨移动水平是多达 8% 比在在 Corg/N 的控制反应堆,比率比 2 降低降低。货到付款移动效率日益增多地反应堆在两个与增加的 Corg/N 比率增加了。货到付款移动百分比直到山峰价值 88%94% 在 BR2,多达 11% 比那高在在比 4 高的 Corg/N 比率的 BR1。氨和货到付款移动的山峰价值几乎与最高的数字与一致(18%27% 总计细菌的数字) 在 BR2 的外长的细菌,作为殖民地形成检测了单位(CFU ) 。而且,在 BR2 的氨和货到付款的移动是仔细与有为氨和货到付款的直到 0.82 和 0.85 的一个系数索引(R2 ) 的接种紧张的数字有关分别地。这些结果建议它在在高 Corg/N 比率与一个不是自养的硝化细菌接种的一个反应堆为氨和碳营养素移动是更有效的,推断不是自养的 nitrifers 将在有氨和货到付款的高水平的废水的处理实际上是更可得到的。 | Naeem ud din Ahmad XU Haiying CHEN Liping LIU Zhipei LIU Shuangjiang | 2008 | Journal of Environmental Sciences2008，20，2： | 17 |
| 5 | Parameters effect on heterogeneous photocatalysed degradation of phenolin aqueous dispersion of TiO_2显示文摘Photocatalytic degradation of phenol selected as model compound of organic pollutant had been investigated in aqueous titanium dioxide (TiO2) dispersion under UV irradiation. The effects of various parameters such as pH, catalyst concentration, phenol concentration, anions, metal ions, electron acceptors, and surfactants on the photocatalytic degradation of phenol were investigated. The degradation kinetics was determined by the change in phenol concentration employing UV-Vis spectrometry as a function of irradiation time. The degradation kinetics of phenol follows pseudo first-order kinetics. The results showed a significant dependence of the photocatalytic degradation of phenol on the functional parameters. The probable promising roles of the additives on the degradation process were discussed. | KASHIF Naeem | 2009 | Journal of Environmental Sciences2009，21，4： | 15 |
| 6 | Effects of continuously regenerating diesel particulate filters on regulated emissions and number-size distribution of particles emitted from a diesel engine显示文摘The effects of continuously regenerating diesel particulate filter (CRDPF) systems on regulated gaseous emissions, and number-size distribution and mass of particles emanated from a diesel engine have been investigated in this study. Two CRDPF units (CRDPF-1 and CRDPF-2) with different specifications were separately retrofitted to the engine running with European steady-state cycle (ESC). An electrical low pressure impactor (ELPI) was used for particle number-size distribution measurement and mass estimation. The conversion/reduction rate (R CR ) of hydrocarbons (HC) and carbon monoxide (CO) across CRDPF-1 was 83% and 96.3%, respectively. Similarly, the R CR of HC and CO and across CRDPF-2 was 91.8% and 99.1%, respectively. The number concentration of particles and their concentration peaks; nuclei mode, accumulation mode and total particles; and particle mass were highly reduced with the CRDPF units. The nuclei mode particles at downstream of CRDPF-1 and CRDPF-2 decreased by 99.9% to 100% and 97.8% to 99.8% respectively; and the particle mass reduced by 73% to 92.2% and 35.3% to 72.4%, respectively, depending on the engine conditions. In addition, nuclei mode particles increased with the increasing of engine speed due to the heterogeneous nucleation initiated by the higher exhaust temperature, while accumulation mode particles were higher at higher loads due to the decrease in the air-to-fuel ratio (A/F) at higher loads. | Zhihua Liu Asad Naeem Shah Yunshan Ge Yan Ding, Jianwei Tan Lei Jiang Linxiao Yu Wei Zhao Chu Wang Tao Zeng | 2011 | Journal of Environmental Sciences2011，23，5： | 15 |
| 7 | 好氧颗粒污泥的形成机理显示文摘本文综述了几种比较流行的好氧颗粒污泥的形成机理,并进行了分析讨论。同时,总结了各种条件下形成好氧颗粒污泥的理化特性、培养条件及其形态。 | 崔成武 纪树兰 高景峰 任海燕 Naeem ud din Ahmad | 2006 | 水处理技术2006，32，2： | 15 |
| 8 | Impacts of continuously regenerating trap and particle oxidation catalyst on the NO_2 and particulate matter emissions emitted from diesel engine显示文摘Two continuously regenerating diesel particulate filter(CRDPF) with different configurations and one particles oxidation catalyst(POC) were employed to perform experiments in a controlled laboratory setting to evaluate their effects on NO 2,smoke and particle number emissions.The results showed that the application of the after-treatments increased the emission ratios of NO 2 /NOx significantly.The results of smoke emissions and particle number(PN) emissions indicated that both CRDPFs had sufficient capacity to remove more than 90% of total particulate matter(PM) and more than 97% of solid particles.However,the POC was able to remove the organic components of total PM,and only partially to remove the carbonaceous particles with size less than 30 nm.The negligible effects of POC on larger particles were observed due to its honeycomb structure leads to an inadequate residence time to oxidize the solid particles or trap them.The particles removal efficiencies of CRDPFs had high degree of correlations with the emission ratio of NO 2 /NOx.The PN emission results from two CRDPFs indicated that more NO 2 generating in diesel oxidation catalyst section could obtain the higher removal efficiency of solid particles.However this also increased the risk of NO 2 exposure in atmosphere. | Zhihua Liu Yunshan Ge Jianwei Tan Chao He Asad Naeem Shah Yan Ding LinxiaoYu Wei Zhao | 2012 | Journal of Environmental Sciences2012，24，4： | 11 |
| 9 | Risk factors for colonoscopic perforation: A population-based study of 80118 cases显示文摘AIM: To assess the incidence and risk factors associated with colonic perforation due to colonoscopy. METHODS: This was a retrospective cross-sectional study. Patients were retrospectively eligible for inclusion if they were 18 years and older and had an inpatient or outpatient colonoscopy procedure code in any facility within the Geisinger Health System during the period from January 1, 2002 to August 25, 2010. Data are presented as median and inter-quartile range, for continuous variables, and as frequency and percentage for categorical variables. Baseline comparisons across those with and without a perforation were made using the two-sample t -test and Pearson's χ2 test, as appropriate.RESULTS: A total of 50 perforations were diagnosed out of 80118 colonoscopies, which corresponded to an incidence of 0.06% (95%CI: 0.05-0.08) or a rate of 6.2 per 10000 colonoscopies. All possible risk factors associated with colonic perforation with a P -value < 0.1 were checked for inclusion in a multivariable logbinomial regression model predicting 7-d colonic perforation. The final model resulted in the following risk factors which were significantly associated with risk of colonic perforation: age, gender, body mass index, albumin level, intensive care unit (ICU) patients, inpatient setting, and abdominal pain and Crohn's disease as indications for colonoscopy. CONCLUSION: The cumulative 7 d incidence of colonic perforation in this cohort was 0.06%. Advanced age and female gender were significantly more likely to have perforation. Increasing albumin and BMI resulted in decreased risk of colonic perforation. Having a colonoscopy indication of abdominal pain or Crohn's disease resulted in a higher risk of colonic perforation. Colonoscopies performed in inpatients and particularly the ICU setting had substantially greater odds of perforation. Biopsy and polypectomy did not increase the risk of perforation and only three perforations occurred with screening colonoscopy. | Uzair Hamdani Raza Naeem Fyeza Haider Pardeep Bansal Michael Komar David L Diehl H Lester Kirchner | 2013 | World Journal of Gastroenterology2013，19，23： | 9 |
| 10 | 欧洲地熊蜂对我国本土熊蜂的生殖干扰评估显示文摘【目的】外来物种与本土亲缘关系较近的物种可能会发生交尾竞争,干扰本土物种的正常繁衍。欧洲地熊蜂Bombus terrestris是全球范围内商业化应用最广的传粉蜂种,但在许多国家造成了生物入侵。本研究旨在明确欧洲地熊蜂对我国本土熊蜂产生生殖干扰的可能性。【方法】采用四级杆飞行时间-气质联用系统(gas chromatography-quadrupole time of flight mass spectrometry,GC-QTOF/MS)测定了欧洲地熊蜂和我国本土9种熊蜂的雄蜂头部分泌物的成分,并进行聚类分析;在人工控制环境下比较了欧洲地熊蜂对我国重要熊蜂种类的交尾影响。【结果】雄蜂头部分泌物气质色谱图在同一熊蜂种内基本一致,而在不同熊蜂种之间差异明显;我国红光熊蜂B.ignitus、兰州熊蜂B.lantschouensis与欧洲地熊蜂的雄蜂头部分泌物成分相似性分别为58.49%与49.23%;在人工控制环境下欧洲地熊蜂雄蜂可以与兰州熊蜂蜂王杂交,并能够显著降低兰州熊蜂的交尾成功率(P<0.01)。【结论】欧洲地熊蜂与我国一些熊蜂种的雄蜂头部分泌物成分相似性较高,能够干扰其正常交尾,具有较高的生殖干扰风险。为了保护我国本土熊蜂资源与生态系统平衡避免造成生物入侵,我们应该谨慎使用外来熊蜂物种。 | 袁晓龙 Muhammad NAEEM 张红 梁铖 黄家兴 安建东 | 2018 | 昆虫学报2018，61，3： | 9 |
| 11 | Influence of supports on photocatalytic degradation of phenol and 4-chlorophenol in aqueous suspensions of titanium dioxide显示文摘The photocatalytic degradation of phenol and 4-chlorophenol (4-CP) in aqueous suspensions with the use of titanium dioxide (TiO2 ) under UV irradiation was examined. The effects of different supporting materials mixed physically with TiO2 were studied to achieve maximum degradation efficiency. Among the three supports, namely activated carbon (AC), silica (SiO2 ) and zeolite (ZSM-5), all exhibited paramount efficiency for degradation of phenol and 4-CP and was better than TiO2 alone. The optimum concentration was found to be 50 mg for all supporting materials. The efficiency order of the three supports was as follows: AC > ZSM-5 > SiO2 , respectively. Whilst, the degradation of phenol and 4-CP was improved from 70.6% to 87.6% and 80.6% to 89.7%, respectively, within 120 min photocatalysis in the presence of optimal amount of AC. The degradation was also comparatively enhanced in the presence of cheaper rice husk and the activity was closed to ZSM-5 and lower than AC. | Kashif Naeem Feng Ouyang | 2013 | Journal of Environmental Sciences2013，25，2： | 8 |
| 12 | Different faces of gastroparesis显示文摘AIM:To test the hypothesis that pain and affect rather than impaired emptying determine symptom severity in patients with gastroparesis.METHODS:Adult patients with documented gastroparesis were enrolled prospectively in a single center and asked to complete the Gastroparesis Cardinal Symptom Index(GCSI),Hospital Anxiety and Depression Scale(HADS),the Short Form 12(SF-12) as quality of life index,rate pain severity and answer 10 open-ended questions.RESULTS:A total of 55 patients(44 women) participated.Idiopathic(n=29) or diabetic(n=11) gastroparesis and connective tissue disease(n=8) were the most common underlying causes.Antiemetics(n=30) and prokinetics(n = 32) were most often prescribed.Seventeen patients used opioids on a daily basis.Nausea and/or vomiting(n=28),pain(n=24) and bloating(n=14) were most commonly listed as dominant symptoms.Patients subjectively attributed symptom improvement to nutritional and dietary therapy(n=11),prokinetics(n=11),antiemetics(n=10) or analgesic agents(n=3).In univariate analyses,the physical subscore of the SF-12 and HADS,but not gastric emptying delay or symptom duration signifi cantly correlated with disease severity as measured by the GCSI.In multivariate analyses,the combination of vomiting,bloating and depression best predicted the overall impact on quality of life.CONCLUSION:The study confi rms the importance of pain and affect in gastroparesis,which requires novel approaches to improve more effectively the quality of life in patients with this disorder. | Klaus Bielefeldt Naeem Raza Susan L Zickmund | 2009 | World Journal of Gastroenterology2009，15，48： | 8 |
| 13 | Achieving strength-ductility synergy in cold spray additively manufactured Al/B4C composites through a hybrid post-deposition treatment显示文摘Cold spray additive manufacturing(CSAM) provides a potential solid state manufacturing route to fabricate variety of aluminum matrix composites(AMCs) with reduced possibility of undesired chemical reactions and residual thermal stresses. This study presents a hybrid(i.e. hot compression + hot rolling)post-deposition treatment to reinvigorate the mechanical properties of cold spray additively manufactured Al/B4 C composites. The as-deposited samples were initially subjected to 30% thickness reduction via hot compression treatment at 500°C followed by a hot rolling treatment with 40% thickness reduction in 2 passes. Electron backscatter diffraction(EBSD) and high resolution transmission electron microscopy(HRTEM) results revealed that after hybrid post-deposition treatment(involving 70%accumulative thickness reduction), the aluminum grains in the matrix were extensively refined due to simultaneous operation of continuous dynamic recrystallization(CDRX) and geometric dynamic recrystallization(GDRX). Furthermore, interfacial defects were remarkably reduced while the nature of Al/Al and Al/B4C interfacial bonding was changed from sheer mechanical interlocking to metallurgical bonding which facilitated efficient transference of applied load to uniformly dispersed bimodal B4C particles. As a result, ultimate tensile strength(UTS) and elongation(EL) of the as-deposited sample were simultaneously improved from 37 to 185 MPa and 0.3% to 6.2%, respectively. | Naeem ul Haq Tariq Lawrence Gyansah Xiang Qiu Chunnijia Hasan Bin Awais Chengwu Zheng Hao Du Jiqiang Wang Tianying Xiong | 2019 | Journal of Materials Science & Technology2019，35，6： | 7 |
| 14 | 气候变化和社会经济驱动因素共同作用了黄土高原区的植被变绿显示文摘我国在黄土高原区开展了大范围的退耕还林还草工程,植被大范围变绿.但气候因子和人类活动如何共同作用植被变化还鲜有报道.本文利用偏微分方法在黄土高原区294个县定量分解了6个驱动因子(3个气候因子包括降水、气温和太阳辐射,3个人类活动因子包括GDP,人口和家畜量)如何影响植被变化.结果显示,2000~2018年间在284个县植被指数出现了增加的趋势,主要是由于气候因子和人类活动共同影响造成的.6个驱动因子中降水在152个县为植被恢复的主导因子,揭示了气候变化、环境保护和经济刺激政策对区域植被恢复都起到了重要作用.本文对于如何定量分析人类活动和气候变化对植被恢复和区域可持续发展提供了一个理论解析框架. | Shahid Naeem 张永强 张选泽 田静 Sawaid Abbas 罗莉莉 Hadush Kidane Meresa | 2021 | Science Bulletin2021，66，12： | 7 |
| 15 | 甘蓝型油菜光合机构对干旱的生理响应显示文摘为探讨油菜光合机构对干旱胁迫的响应,研究了2个抗旱性不同的油菜(Brassica napus L.)品种在干旱胁迫下农艺性状、气体交换参数、叶绿素荧光参数、叶绿体超微结构及Rubisco活性等指标的变化。结果表明,干旱胁迫下,相对增长率、总干重、叶面积和叶片相对含水量降低,而根冠比增加;净光合速率、蒸腾速率、气孔导度和胞间CO2浓度降低,而气孔限制值增加;PSⅡ最大光能转换效率、PSⅡ实际光能转换效率、光化学淬灭和电子传递效率降低,而非光化学淬灭系数增加;两品种的叶绿体超微结构遭到不同程度破坏;且叶绿素含量和Rubisco活性降低,脯氨酸和可溶性糖的含量增加。敏感型品种秦优8号光合机构遭受干旱的破坏程度明显大于抗旱型品种Q2。 | 代碌碌 Muhammad Shahbaz Naeem 张春雷 刘哲辉 陈畅 胡超 赵运成 张利艳 刘丽欣 李俊 马霓 | 2016 | 中国油料作物学报2016，38，6： | 6 |
| 16 | Phylogeny of the Rosidae: A dense taxon sampling analysis显示文摘Rosidae,被子植物的约 90 000 种类的 clade,在产地和生活形式展出显著词法差异和非凡的异质。决定在 Rosidae 以内的种系发生的关系是困难的,在由于嵌套的放射和 clade 的庞大的尺寸的大部分。发展史的当前的估计包含差的分辨率或支持的区域,并且在那里有是很少尝试综合可得到的数据进 Rosidae 的一个全面看法发展史。我们试图从叶绿体 rbcL, atpB,和 matK 基因和 mitochondrial matR 基因的 GenBank 用两最新产生的顺序和数据与一个稠密的采样计划改进 Rosidae 的发展史的理解。我们从 9300 种类联合了序列,代表进 supermatrix 的 2775 个类, 138 个家庭,和 17 目。尽管在 supermatrix 的 59.26% 房间没有数据,我们的结果通常同意 Rosidae 发展史的以前的估计并且在拓扑学的几个区域提供更大的分辨率和支持。几种引人注目的种系发生的关系被恢复,包括一些新奇关系。二个家庭(Euphorbiaceae 和 Salvadoraceae ) 和 467 个类在我们的采样作为 non-monophyletic 被恢复,建议对未来的需要这些组的系统的研究。我们的学习为解决 rosid 关系显示出一条植物地明智的生物信息学途径和稠密的分类采样的价值。产生的树在 Rosidae 以内为进化模式的大规模分析提供一个起点。 | Miao Sun Rehan Naeem Jun-Xia Su Zhi-Yong Cao J. Gordon Burleigh Pamela S. Soltis Douglas E. Soltis Zhi-Duan Chen | 2016 | Journal of Systematics and Evolution2016，54，4： | 6 |
| 17 | Three Tier Fog Networks: Enabling IoT/5G for Latency Sensitive Applications显示文摘Following the progression in Internet of Things(IoT) and 5G communication networks, the traditional cloud computing model have shifted to fog computing. Fog computing provides mobile computing, network control and storage to the network edges to assist latency critical and computation-intensive applications. Moreover, security features are improved in fog paradigm by processing critical data on edge devices instead of data centres outside the control plane of users. However, fog network deployment imposes many challenges including resource allocation, privacy of users, non-availability of programming model and testing software and support for the heterogenous networks. This article highlights these challenges and their potential solutions in detail. This article also discusses threetier fog network architecture, its standardization and benefits in detail. The proposed resource allocation mechanism for three tier fog networks based on swap matching is described. Results show that by practicing the proposed resource allocation mechanism, maximum throughput with reduced latency is achieved. | Romana Shahzadi Ambreen Niaz Mudassar Ali Muhammad Naeem Joel J.P.C.Rodrigues Farhan Qamar Syed Muhammad Anwar | 2019 | China Communications2019，16，3： | 6 |
| 18 | Emission characteristics of offshore fishing ships in the Yellow Bo Sea, China显示文摘Maritime transport has been playing a decisive role in global trade. Its contribution to the air pollution of the sea and coastal areas has been widely recognized. The air pollutant emission inventories of several harbors in China have already been established. However,the emission factors of local ships have not been addressed comprehensively, and thus are lacking from the emission inventories. In this study, on-board emission tests of eight diesel-powered offshore fishing ships were conducted near the coastal region of the northern Yellow Bo Sea fishing ground of Dalian, China. Results show that large amounts of fine particles(< 0.5 μm, 90%) were found in maneuvering mode, which were about five times higher than those during cruise mode. Emission rates as well as emission factors based on both distance and fuel were determined during the cruise and maneuvering modes(including departure and arrival). Average emission rates and distance-based emission factors of CO, HC and PM were much higher during the maneuvering mode as compared with the cruise mode. However, the average emission rate of Nitrous Oxide(NOx) was higher during the cruise mode as compared with the maneuvering modes. On the contrary, the average distance-based emission factors of NOxwere lower during the cruise mode relative to the maneuvering mode due to the low sailing speed of the latter. | Yingshuai Liu Yunshan Ge Jianwei Tan Mingliang Fu Asad Naeem Shah Luqiang Li Zhe Ji Yan Ding | 2018 | Journal of Environmental Sciences2018，30，3： | 5 |
| 19 | Influence of particulate morphology on microstructure and tribological properties of cold sprayed A380/Al2O3 composite coatings显示文摘In this study,three kinds of A380/Al2O3 composite coatings were prepared by cold spray(CS)using spherical,irregular and spherical+irregular shaped Al2O3 particulates separately mixed in the original A380 alloy powders.The influence of Al2O3 particulates’morphology on the microstructural characteristics(i.e.retention of Al2O3 content in coatings,coating/matrix interfacial bonding,pore size distribution and morphology etc.)and wear performance of the coatings was investigated by scanning electron microscopy(SEM),X-ray computed tomography(XCT)and 3-D optical profilometry.Results indicated that the spherical Al2O3 showsobvious tamping effect during deposition process.As a result,the interfaceshowedawavy shape while the matrix and particulates were mechanical interlocked with much improved adhesion.In addition,the porosity of the coating was minimized and the pores exhibited curved spherical structure with reduced dimensions.The irregular Al2O3 particles predominantly displayed the embedding effect together with fragmentation of Al2O3 particulates.Consequently,poor coating/matrix interfacial bonding,high porosity and the formation of angular-shaped pores were resulted in the coating.Dry sliding wear tests results revealed that the wear resistance of the coating is directly related with the retained content of Al2O3 in the coating.The coating containing irregular Al2O3 particulates displayed superior wear performance with its wear rate one seventh of that of the pure A380 alloy coating.The coating containing both kinds of Al2O3 particulates showed mixed characteristics of above two kinds of Al2O3 composite coatings. | Xiang Qiu Naeem ul Haq Tariq Lu Qi Jun-Rong Tang Xin-Yu Cui Hao Du Ji-Qiang Wang Tian-Ying Xiong | 2020 | Journal of Materials Science & Technology2020，44，9： | 5 |
| 20 | HIDA scan for functional gallbladder disorder: ensure that you know how the scan was done显示文摘BACKGROUND: Despite the increasing use of fatty meal(FM) as a substitute for cholecystokinin(CCK) in pain reproduction during hepato-imino-diacetic acid(HIDA) scan in functional gallbladder disorder, there are no studies comparing the differences between CCK and FM. The present study was to compare the efficacy of FM in comparison of CCK in FGBD application. METHODS: Patients undergoing HIDA scans from August 2013 to May 2014 were divided into two groups: those undergoing CCK-stimulated HIDA scan versus FM-stimulated HIDA scan. These groups were compared according to demographics and HIDA results.RESULTS: Of 153 patients, 70 received CCK and 83 FM. There was no difference regarding age, gender, gallstones, gallbladder ejection fraction and time to visualization. However, significantly more of the patients receiving CCK than FM experienced pain reproduction(61% vs 30%, P<0.01).CONCLUSIONS: Stimulation of gallbladder contractility with a FM during HIDA is less than half as likely to reproduce biliary symptoms compared to CCK, despite similar ejection fractions and other parameters. It is essential that providers account for this difference when counseling patients regarding cholecystectomy for functional gallbladder disorder. | Naeem Goussous Hadia Maqsood Ethan Spiegler Gopal C Kowdley Steven C Cunningham | 2017 | Hepatobiliary & Pancreatic Diseases International2017，16，2： | 5 |
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