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| 1 | Nano-microbubble flotation of fine and ultrafine chalcopyrite particles显示文摘As is well known to mineral processing scientists and engineers, fine and ultrafine particles are difficult to float mainly due to the low bubble-particle collision efficiencies. Though many efforts have been made to improve flotation performance of fine and ultrafine particles, there is still much more to be done. In this paper, the effects of nano-microbubbles(nanobubbles and microbubbles) on the flotation of fine( 38 + 14.36 lm) and ultrafine( 14.36 + 5 lm) chalcopyrite particles were investigated in a laboratory scale Denver flotation cell. Nano-microbubbles were generated using a specially-designed nanomicrobubble generator based on the cavitation phenomenon in Venturi tubes. In order to better understand the mechanisms of nano-microbubble enhanced froth flotation of fine and ultrafine chalcopyrite particles, the nano-microbubble size distribution, stability and the effect of frother concentration on nanobubble size were also studied by a laser diffraction method. Comparative flotation tests were performed in the presence and absence of nano-microbubbles to evaluate their impact on the fine and ultrafine chalcopyrite particle flotation recovery. According to the results, the mean size of nano-microbubbles increased over time, and decreased with increase of frother concentration. The laboratory-scale flotation test results indicated that flotation recovery of chalcopyrite fine and ultrafine particles increased by approximately 16–21% in the presence of nano-microbubbles, depending on operating conditions of the process. The presence of nano-microbubbles increased the recovery of ultrafine particles( 14.36 + 5 lm) more than that of fine particles( 38 + 14.36 lm). Another major advantage is that the use of nano-microbubbles reduced the collector and frother consumptions by up to 75% and 50%,respectively. | Ahmadi Rahman Khodadadi Darban Ahmad Abdollahy Mahmoud Fan Maoming | 2014 | International Journal of Mining Science and Technology2014，24，4： | 28 |
| 2 | Potential Prevention:Aloe Vera Mouthwash May Reduce Radiation-Induced Oral Mucositis in Head and Neck Cancer Patients显示文摘在最近的年里,更多的头和颈癌症病人与放射疗法被对待。导致放射的 mucositis 是一普通并且在有头和颈癌症的病人之中的放射疗法的剂量限制毒性。为头和颈癌症经历放射治疗的病人也在开发口头的 candidiasis 的增加的风险。局部地或全身地使用阻止或对待 radiationinduced mucositis 的很多个新代理人被调查了,但是有广泛地不为 mucositis 接受了预防或有效的治疗。热门芦荟 vera 广泛地为温和晒斑,冻伤,和烫伤的灼伤被使用。研究为口头的溃疡愈合弯屈,粘膜保护,和治疗报导了芦荟胶化的有益的效果,除了 antiinflammatory, immunomudulation,抗真菌,清除自由激进分子,增加的骨胶原形成和禁止的 collagenase。此处,作者要求那口头的芦荟 vera 嗽口水不能仅仅由它愈合的创伤和 antiinflammatory 机制阻止导致放射的 mucositis,而且可以减少经历头和颈放射疗法由于的病人的口头的 candidiasis 它的抗真菌并且 immunomodulatory 性质。因此,芦荟 vera 嗽口水可以为与头和颈癌症一起在病人对待导致放射的口头的 mucositis 和 candidiasis 提供一个其他的代理人。 | Amirhossein Ahmadi | 2012 | Chinese Journal of Integrative Medicine2012，18，8： | 12 |
| 3 | Critical role of SDF-1/CXCR4 signaling pathway in stem cell homing in the deafened rat cochlea after acoustic trauma显示文摘Previous animal studies have shown that stromal cell-derived factor-1(SDF-1)/CXC chemokine receptor-4(CXCR4) signaling pathway plays an important role in the targeted migration of bone marrow-derived mesenchymal stem cells(BMSCs) to the injured area. In the present study, we aimed to investigate the potential role of chemotactic SDF-1/CXCR4 signaling pathway in the homing of transplanted BMSCs to the injured cochlea after noise-induced hearing loss(NIHL) in a rat model. White noise exposure(110 d B) paradigm was used for hearing loss induction in male rats for 6 hours in 5 days. Distortion-product otoacoustic emission(DPOAE) responses were recorded before the experiment and post noise exposure. Hoechst 33342-labeled BMSCs and CXCR4 antagonist(AMD3100)-treated BMSCs were injected into the rat cochlea through the round window. SDF-1 protein expression in the cochlear tissue was assayed using western blot assay. The number of labeled BMSCs reaching the endolymph was determined after 24 hours. SDF-1 was significantly increased in the cochlear tissue of rats in the noise exposure group than in the control group. The number of Hoechst 33342-labeled BMSCs reaching the endolymph of the cochlea was significantly smaller in the AMD3100-treated BMSCs group than in the normal BMSCs group. Our present findings suggest that the SDF-1/CXCR4 signaling pathway has a critical role in BMSCs migration to the injured cochlea in a rat model of noise-induced hearing loss. | Ali Asghar Peyvandi Navid Ahmady Roozbahany Hassan Peyvandi Hojjat-Allah Abbaszadeh Niloofar Majdinasab Mohammad Faridan Somayeh Niknazar | 2018 | Neural Regeneration Research2018，13，1： | 11 |
| 4 | Effects of nanobubble and hydrodynamic parameters on coarse quartz flotation显示文摘Quartz, the second most abundant mineral in the earth's crust, is a gangue mineral in practically every flotation process. Coarse quartz flotation has been a long standing problem in various mineral processing plants to reduce milling cost and increase valuable mineral recovery. Based on this, the effects of nanobubbles(NBs) and hydrodynamic parameters on coarse quartz particle flotation were systematically investigated. Mechanical flotation experiments were carried out using the 7 cm and 9 cm diameter impellers in order to produce different hydrodynamic conditions. 900–1300 rpm impeller speeds were used for the 7 cm diameter impeller and 554–786 rpm for the 9 cm diameter impeller. The results show that the presence of NBs increased the flotation recovery of à425 + 106 lm quartz by up to 21%. For the7 cm diameter impeller, the maximum flotation recoveries of 86.4% and 98% were obtained in the absence and presence of NBs at Reynolds number(Re) of 81,000 and 66,000, respectively. For the 9 cm diameter impeller, the maximum recoveries of 86.3% and 97.5% were obtained in the absence and presence of NBs at Re of 90,000 and 75,000, respectively. NBs increased the flotation rate constant up to 36%. | Sabereh Nazari Sied Ziaedin Shafaei Mahdi Gharabaghi Rahman Ahmadi Behzad Shahbazi Fan Maoming | 2019 | International Journal of Mining Science and Technology2019，29，2： | 10 |
| 5 | Endoscopic mucosal resection in the upper gastrointestinal tract显示文摘Endoscopic mucosal resection (EMR) is a technique used to locally excise lesions confined to the mucosa. Its main role is the treatment of advanced dysplasia and early gastrointestinal cancers. EMR was originally described as a therapy for early gastric cancer. Recently its use has expanded as a therapeutic option for ampullary masses, colorectal cancer, and large colorectal polyps. In the Western world, the predominant indication for EMR in the upper gastrointestinal tract is the staging and treatment of advance dysplasia and early neoplasia in Barrett's esophagus. This review will describe the basis, indications, techniques, and complications of EMR, and its role in the management of Barrett's esophagus. ? 2008 WJG. All rights reserved. | Anis Ahmadi Peter Draganov | 2008 | World Journal of Gastroenterology2008，14，13： | 9 |
| 6 | 新型SPD工艺对AM60镁合金性能不均匀性的影响显示文摘利用新型大塑性变形(SPD)技术提高镁合金的冶金性能。在此过程中,先进行循环挤压−压缩−角挤压(CECAP)过程,再在出口处进行挤压,起到附加背压的作用。因此,与等径角挤压(ECAP)相比,期望获得更加均匀和优异的力学性能。为了评价这种新方法的有效性和能力,对AM60镁合金进行加工。有限元分析表明,新方法的应变值和均匀应变分布均显著提高。此外,与传统的ECAP相比,新方法的压应力增加约110%。实验结果表明,经新工艺处理后,试样的硬度和强度均有显著提高,这是由于其晶粒细化,显微组织更加均匀,并且细化的β相沿晶界均匀分布。因此,该新工艺在未来镁合金生产中具有广阔的应用前景。 | Siroos AHMADI Vali ALIMIRZALOO Ghader FARAJI Ali DONIAVI | 2021 | Transactions of Nonferrous Metals Society of China2021，31，3： | 8 |
| 7 | Assessment of the anterior chamber parameters after laser iridotomy in primary angle close suspect using Pentacam and gonioscopy显示文摘AIM:To evaluate the changes in the anterior segment parameters of the subjects with primary angle closure suspect(PACS) before and after laser iridotomy(LI) using the Pentacam and gonioscopy. METHODS:Forty-eight eyes of 48 PACS were included.Anterior chamber angle(ACA),central anterior chamber depth(ACD),anterior chamber volume(ACV) and central corneal thickness(CCT) were recorded from the Pentacam before and one month after LI.ACA was graded according to Shaffer classification using Goldmann gonioscopy.RESULTS:ACA increased significantly from 25.59±4.41 to 26.46±4.33 degrees(P=0.009) and ACV changed from 85.97±16.07mm3to 99.25±15.83mm3(P=0.000).The changes in ACD,CCT and intraocular pressure were non-significant(P>0.05).Gonioscopy showed significant widening of the Shaffer angle in 4 quadrants(P<0.001).CONCLUSION:Pentacam can serve as the objective instrument in assessing the efficacy of LI. | Alireza Esmaeili Behzad Barazandeh Sina Ahmadi Alireza Haghi Seyed Mahdi Ahmadi Hosseini Fereshteh Abolbashari | 2013 | International Journal of Ophthalmology(English edition)2013，6，5： | 8 |
| 8 | Determination of oil well production performance using artificial neural network (ANN) linked to the particle swarm optimization (PSO) tool显示文摘Greater complexity is involved in the transient pressure analysis of horizontal oil wells in contrast to vertical wells,as the horizontal wells are considered entirely horizontal and parallel with the top and underneath boundaries of the oil reserve.Therefore,there is an essential need to estimate productivity of horizontal wells accurately to examine the effectiveness of a horizontal well in terms of technical and economic prospects.In this work,novel and rigorous methods based on two different types of intelligent approaches including the artificial neural network(ANN)linked to the particle swarm optimization(PSO)tool are developed to precisely forecast the productivity of horizontal wells under pseudo-steady-state conditions.It was found that there is very good match between the modeling output and the real data taken from the literature,so that a very low average absolute error percentage is attained(e.g.,<0.82%).The developed techniques can be also incorporated in the numerical reservoir simulation packages for the purpose of accuracy improvement as well as better parametric sensitivity analysis. | Mohammad Ali Ahmadi Reza Soleimani Moonyong Lee Tomoaki Kashiwao Alireza Bahadori | 2015 | Petroleum2015，1，2： | 8 |
| 9 | The effect of tranexamic acid in traumatic brain injury: A randomized controlled trial显示文摘 | Abolfazl Jokar Koorosh Ahmadi Tayyebeh Salehi Mahdi Sharif-Alhoseini Vafa Rahimi-Movaghar | 2017 | Chinese Journal of Traumatology2017，20，1： | 8 |
| 10 | 翼状胬肉:羊膜移植和自体结膜瓣移植(英文)显示文摘目的:比较原发性和复发性翼状胬肉羊膜移植术和自体结膜瓣移植术的效果,测定指标为术后复发率。方法:对从2004-04/2006-02连续翼状胬肉病例作前瞻性研究。患者被随机分为2组:羊膜移植组(26例)和自体结膜瓣移植组(24例)。所有病例均用羊膜移植术或自体结膜瓣移植术,并广泛切除纤维血管组织。随访24mo观察复发和并发症。手术操作由同一位手术医师施行。对人口统计变数、手术技术、复发和术后并发症的相关性进行分析。结果:患者男女比例为4∶1,右眼与左眼的比例为3∶2。其中70%翼状胬肉是原发性,30%为复发。最常见的临床症状是眼部充血和视力下降,最常见的并发症是复发和角膜瘢痕。随访1mo,羊膜移植组和自体结膜瓣移植组的复发率分别为3.8%,8.3%,随访24mo后比例上升为46.2%,25%。结论:自体结膜瓣移植术后2a随访的成功率更好。翼状胬肉羊膜移植术复发率高,不被广泛接受。 | Mohammad Reza Besharati Seyed Ali Mohammad Miratashi Amir Bahrami Ahmadi | 2006 | 国际眼科杂志2006，6，6： | 7 |
| 11 | Colorectal cancer surveillance in inflammatory bowel disease: The search continues显示文摘Patients with infl ammatory bowel disease (IBD) are at increased risk for colorectal cancer (CRC). Risk factors for the development of CRC in the setting of IBD include disease duration, anatomic extent of disease, age at time of diagnosis, severity of inflammation, family history of colon cancer, and concomitant primary sclerosing cholangitis. The current surveillance strategy of surveillance colonoscopy with multiple random biopsies most likely reduces morbidity and mortality associated with IBD-related CRC. Unfortunately, surveillance colonoscopy also has severe limitations including high cost, sampling error at time of biopsy, and interobserver disagreement in histologically grading dysplasia. Furthermore, once dysplasia is detected there is disagreement about its management. Advances in endoscopic imaging techniques are already underway, and may potentially aid in dysplasia detection and improve overall surveillance outcomes. Management of dysplasia depends predominantly on the degree and focality of dysplasia, with the mainstay of management involving either proctocolectomy or continued colonoscopic surveillance. Lastly, continued research into additional chemopreventive agents may increase our arsenal in attempting to reduce the incidence of IBD-associated CRC. | Anis Ahmadi Steven Polyak Peter V Draganov | 2009 | World Journal of Gastroenterology2009，15，1： | 7 |
| 12 | Viral hepatitis prevalence in patients with active and latent tuberculosis显示文摘AIM: To assess the prevalence of hepatitis B virus(HBV) and hepatitis C virus(HCV) infection and association with drug induced liver injury(DILI) in patients undergoing anti-tuberculosis(TB) therapy.METHODS: Four hundred and twenty nine patients with newly diagnosed TB- either active disease or latent infection- who were due to commence antiTB therapy between September 2008 and May 2011 were included. These patients were prospectively tested for serological markers of HBV, HCV and human immunodeficiency virus(HIV) infections- hepatitis B core antigen(HBc Ag), hepatitis B surface antigen(HBs Ag), hepatitis B e antigen, Ig G and Ig M antibody to HBc Ag(anti-HBc), HCV Ig G antibody and HIV antibody using a combination of enzyme-linked immunosorbent assay, Western blot assay and polymerase chain reaction techniques. Patients were reviewed at least monthly during the TB treatment initiation phase. Liver function tests were measured prior to commencement of antiTB therapy and 2-4 wk later. Liver function tests were also performed at any time the patient had significant nausea, vomiting, rash, or felt non-specifically unwell. Fisher's exact test was used to measure significance in comparisons of proportions between groups. A P value of less than 0.05 was considered statistically significant.RESULTS: Of the 429 patients, 270(62.9%) had active TB disease and 159(37.1%) had latent TB infection. 61(14.2%) patients had isolated anti-HBc positivity, 11(2.6%) were also HBs Ag positive and 7(1.6%) were HCV-antibody positive. 16/270 patients with active TB disease compared to 2/159 patients with latent TB infection had markers of chronic viral hepatitis(HBs Ag or HCV antibody positive; P = 0.023). Similarly the proportion of HBs Ag positive patients were significantly greater in the active vs latent TB infection group(10/43 vs 1/29, P = 0.04). The prevalence of chronic HBV or HCV was significantly higher than the estimated United Kingdom prevalence of 0.3% for each. We found no association between DILI and presence of serological markers of HBV or HCV. Three(5.3%) patients with serological markers of HBV or HCV infection had DILI compared to 25(9.5%) patients without; P = 0.04.CONCLUSION: Viral hepatitis screening should be considered in TB patients. DILI risk was not increased in patients with HBV/HCV. | Hesam Ahmadi Nooredinvand David W Connell Mahmoud Asgheddi Mohammed Abdullah Marie O'Donoghue Louise Campbell Melissa I Wickremasinghe Ajit Lalvani Onn Min Kon Shahid A Khan | 2015 | World Journal of Gastroenterology2015，21，29： | 7 |
| 13 | Effect of different seed treatments on dormancy breaking and germination in three species in arid and semi-arid lands显示文摘Seeds of many woody plant species have one of several types of dormancy. They do not germinate unless specific environmental signals are in place or events occur. This study was conducted to evaluate the effects of scarification treatments on seed dormancy and germination of Acacia nilotica (L.) Willd. ex Del., Prosopis juliflora (Sw.) DC. and Dodonaea viscosa (L.) Jacq. The following treatments were applied: T1, untreated seed (control); T2, sulphuric acid (97%) for 45 min; T3, boiling water for 5 min. The seeds were cultured on a Murashige and Skoog (MS) medium after sterilization. The responses of seeds to treatments were compared with each other and with the control treatment. Germination was observed daily for a 30-day period. Results indicated positive responses to treatments, while impermeable seed coats may be responsible for low germination rates in intact seeds as seen experimentally in the untreated control. The highest germination was obtained for P. juliflora and D. viscosa acid-scarified seeds (80.8%-90.8%) and for scarified seeds of A. nilotica (50.2%) boiled in water. The germination indices, i.e., final germination percentage (FG), mean daily germination (MDG) and germination rate (GR), were significantly affected by treatments and species (p<0.01). | Seyed Mohammad Hosseini NASR Sekineh Kiani SAVADKOOHI Elahe AHMADI | 2013 | Forestry Studies in China2013，15，2： | 7 |
| 14 | Prediction of kiwifruit firmness using fruit mineral nutrient concentration by artificial neural network(ANN) and multiple linear regressions(MLR)显示文摘Many properties of fruit are influenced by plant nutrition. Fruit firmness is one of the most important fruit characteristics and determines post-harvest life of the fruit. In recent decades, artificial intelligence systems were employed for developing predictive models to estimate and predict many agriculture processes. In the present study, the predictive capabilities of multiple linear regressions(MLR) and artificial neural networks(ANNs) are evaluated to estimate fruit firmness in six months, including each of nutrients concentrations(nitrogen(N), potassium(K), calcium(Ca) and magnesium(Mg)) alone(P_1), combination of nutrients concentrations(P_2), nutrient concentration ratios alone(P_3), and combination of nutrient concentrations and nutrient concentration ratios(P_4). The results showed that MLR model estimated fruit firmness more accuracy than ANN model in three datasets(P_1, P_2 and P_4). However, the application of P_3(N/Ca ratio) as the input dataset in ANN model improved the prediction of fruit firmness than the MLR model. Correlation coefficient and root mean squared error(RMSE) were 0.850 and 0.539 between the measured and the estimated data by the ANN model, respectively. Generally, the ANN model showed greater potential in determining the relationship between 6-mon-fruit firmness and nutrients concentration. | Ali Mohammadi Torkashvand Abbas Ahmadi Niloofar Layegh Nikravesh | 2017 | Journal of Integrative Agriculture2017，16，7： | 7 |
| 15 | 纳米流体在各种热管中的应用综述(英文)显示文摘纳米技术被广泛应用于传热装置中,以提高热性能。纳米流体应用于热管中,可降低热管的热阻,提高热管的传热能力。文中,对纳米在流体热管中的应用进行了全面的综述。阐述了纳米流体对传统热管、脉动热管、热虹膜等各种类型热管的热性能的影响。此外,发现了纳米颗粒的高效利用必须有一定的浓度;因动力黏度的增加导致颗粒团聚的可能性越高,高浓度的纳米颗粒会产生较高的热阻。热传递性能的增强是晶核位置的增多和纳米流体本身具有的更大热导率的结果。 | Mohammad Alhuyi NAZARI Mohammad H. AHMADI Milad SADEGHZADEH Mohammad Behshad SHAFII Marjan GOODARZI | 2019 | Journal of Central South University2019，26，5： | 7 |
| 16 | 硫化铜矿SAG(半自磨)磨矿废品浮选药剂的交互作用显示文摘浮选药剂在黏土矿中基础矿物的选矿中表现出复杂的行为。利用中心组合设计法研究浮选药剂对低品位高黏质硫化物矿中铜浮选效率的交互作用。初步结果表明,在石灰作pH调节剂的情况下,异丙基黄原酸钠(SIPX)和O-异丙基-N-乙基硫基氨基甲酸酯(IPETC)是最有效的捕收剂。在不同的pH值下,评估捕收剂(SIPX和IPETC)用量和起泡剂甲基异丁基甲醇(MIBC)用量对分离效率的影响。基于方差分析(ANOVA)结果,对于分离效率而言,捕收剂用量与pH值以及捕收剂用量与起泡剂用量之间的交互作用显著。在低捕收剂用量时,pH值从9提高到11可使IPETC的铜分离效率从81%提高到86%,SIPX的铜分离效率从77%提高到86%。方差分析结果表明,在pH值11、8.6 g/t SIPX、7 g/t IPETC和20 g/t MIBC的条件下,铜分离效率最高(88.7%)。最终,可得出结论,捕收剂SIPX和IPETC更适合于处理高黏质硫化矿。 | Ali AHMADI Mojtaba REZAEI Seyed Mohammad SADEGHIEH | 2021 | Transactions of Nonferrous Metals Society of China2021，31，3： | 6 |
| 17 | Wettability alteration and oil recovery by spontaneous imbibition of smart water and surfactants into carbonates显示文摘Naturally fractured carbonate reservoirs have very low oil recovery efficiency owing to their wettability and tightness of matrix.However,smart water can enhance oil recovery by changing the wettability of the carbonate rock surface from oilwet to water-wet,and the addition of surfactants can also change surface wettability.In the present study,the effects of a solution of modified seawater with some surfactants,namely C12 TAB,SDS,and TritonX-100(TX-100),on the wettability of carbonate rock were investigated through contact angle measurements.Oil recovery was studied using spontaneous imbibition tests at 25,70,and 90°C,followed by thermal gravity analysis to measure the amount of adsorbed material on the carbonate surface.The results indicated that Ca2+,Mg2+,and SO42-.ions may alter the carbonate rock wettability from oil-wet to water-wet,with further water wettability obtained at higher concentrations of the ions in modified seawater.Removal of NaCl from the imbibing fluid resulted in a reduced contact angle and significantly enhanced oil recovery.Low oil recoveries were obtained with modified seawater at 25 and 70°C,but once the temperature was increased to 90°C,the oil recovery in the spontaneous imbibition experiment increased dramatically.Application of smart water with C12 TAB surfactant at 0.1 wt%changed the contact angle from 161°to 52°and enhanced oil recovery to 72%,while the presence of the anionic surfactant SDS at 0.1 wt%in the smart water increased oil recovery to 64.5%.The TGA analysis results indicated that the adsorbed materials on the carbonate surface were minimal for the solution containing seawater with C12 TAB at 0.1 wt%(SW+CTAB(0.1 wt%)).Based on the experimental results,a mechanism was proposed for wettability alteration of carbonate rocks using smart water with SDS and C12 TAB surfactants. | Saeb Ahmadi Mostafa Hosseini Ebrahim Tangestani Seyyed Ebrahim Mousavi Mohammad Niazi | 2020 | Petroleum Science2020，17，3： | 6 |
| 18 | Fatal motorcycle accidents in Fars Province, Iran: a com- munity-based survey显示文摘ObjectiveTo 在 Fars 省识别摩托车事故的牺牲品的主要特征, Iran.MethodsThis 代表性的学习在从 2009 年 3 月在伊朗有所有 31 个省的第四张最大的人口到 2010 年 6 月的 Fars 省被进行。我们从所有 542 的 includeddata 由于机动车辆事故记录了死亡的盒子。数据从由人口统计、事故相关的信息组成的法庭的药登记被记录。人口统计的信息由名字,年龄,性别,致命的牺牲品(摩托车驱动程序对旅客) 的地位和 2 345 尸体从法庭的药档案记录的教育 level.ResultsOf 组成了,(23.1%) 542 作为机动车辆事故给了死亡的原因。这些牺牲品的吝啬的年龄是(31.4 ±16.5 ) 年,和男性到女比率是 28。头损害是在这些牺牲品的死亡的最普通的原因,并且总的来说,他们趋于有教育的底层。摩托车事故经常包含了更年轻的年龄组(15-35 年) ,并且与一顶头盔的弃权联系的头损伤是 death.ConclusionsHead 损害的最普通的原因在在我们学习了的省的牺牲品之中是经常的。这种状况可能与 victims’ 有关关于交通法律与他们的弱实施一起导致加速和这些法律的不顾的低社会经济的地位和很少教育。 | Seyed Taghi Heydari Najmeh Maharlouei Aft Foroutan Yaser Sarikhani Fariborz Ghaffarpasand Arya Hedjazi Mohammad Zarenezhad Ghasem Moafian Mohammad Reza Aghabeigi Payam Peymani Seyed Mehdi Ahmadi Maryam Dehghankhalili Hassan Joulaei Kamran B. Lankarani | 2012 | Chinese Journal of Traumatology2012，15，4： | 6 |
| 19 | Comparison of machine learning methods for estimating permeability and porosity of oil reservoirs via petro-physical logs显示文摘This paper deals with the comparison of models for predicting porosity and permeability of oil reservoirs by coupling a machine learning concept and petrophysical logs.Different machine learning methods including conventional artificial neural network,genetic algorithm,fuzzy decision tree,the imperialist competitive algorithm(ICA),particle swarm optimization(PSO),and a hybrid of those ones are employed to have a comprehensive comparison.The machine learning approach was constructed and tested via data samples recorded from northern Persian Gulf oil reservoirs.The results gained from the machine learning models used in this paper are compared to the relevant real petrophysical data and the outputs achieved by other methods employed in our previous studies.The average relative absolute deviation between the approach estimations and the relevant actual data is found to be less than 1%for the hybridized approaches.The results reported in this paper indicate that implication of hybridized machine learning methods in porosity and permeability estimations can lead to the construction of more reliable static reservoir models in simulation plans. | Mohammad Ali Ahmadi Zhangxing Chen | 2019 | Petroleum2019，5，3： | 6 |
| 20 | An exploratory study on the use of enzyme activities as sediment tracers:biochemical fingerprints?显示文摘Little information exists on the potential of soil enzyme activities,which are sensitive to soil properties and management,for the characterization of sediment sources at the catchment scale.The objective of this study is to explore and evaluate enzyme activity as tracer for sediment fingerprinting in the Hiv catchment(55 km^2),Iran.Therefore,four enzymes were measured from 42 different sampling sites,covering three sediment source areas(rangeland/surface erosion,orchard/surface erosion,and streambank erosion),as well as from 12 sediment samples from reservoir check dams (sediment sinks).The results indicate that,based upon backward mode discriminant analysis,βglucosidase and dehydrogenase,allowed more than 95%of the samples to be correctly assigned to their source areas.These enzymes were selected as input data for a mixing-model to determine the relative contribution of the sampled sediment sources.The mean contributions from rangeland, orchard and streambank sources in the study area were estimated as 11.3%,15.1%and 73.7%, respectively.Using geochemical tracers,the mean contribution from rangeland,orchard and streambank sources was estimated as 14.1%,9.5%and 74.8%,respectively.Combined biochemical and geochemical tracers,similar values were obtained(18.7%,10.7%and 70.7%,respectively).Our results indicate that soil enzyme activity allows for a good characterization of sediment sources,and can provide a complementary tool to currently existing sediment fingerprinting approaches.However, the method should be also tested in other regions. | Kazem NOSRATI Gerard GOVERS Hassan AHMADI Forood SHARIFI Mohammad Ali AMOOZEGAR Roel MERCKX Matthias VANMAERCKE | 2011 | International Journal of Sediment Research2011，26，2： | 5 |
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