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Empirical Investigation of Treatment of Sour Gas by Novel Technology: Energy Optimization
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作者 Ehsan Monfared Farshad Farahbod 《American Journal of Analytical Chemistry》 CAS 2023年第4期175-183,共9页
The sour gas sweetening is one of the main processes in gas industries. Gas sweetening is done through chemical processes. Therefore, it requires high cost and energy. The results show that increasing the operating te... The sour gas sweetening is one of the main processes in gas industries. Gas sweetening is done through chemical processes. Therefore, it requires high cost and energy. The results show that increasing the operating temperature increases the mass transfer coefficient and increases the mass transfer rate. Theoretical and experimental data show that sulfur removal in 4.5 W magnetic field is desirable. The increase in sulfur removal percentage in the magnetic field of 4.5 W and 6.75 W is about 16.4% and 15.2%, respectively. According to the obtained results, the effect of temperature increase from 18.8°C to 23.4°C is more evident than the effect of temperature change from 23.4°C to 32.2°C. Because more thermal energy is needed to provide higher temperatures. Therefore, the temperature of 23.4°C is reported as the optimal temperature. The results of this research show that the percentage of sulfur removal is also high at this temperature. 展开更多
关键词 Oil and gas Industries Optimized Energy treatment Process Empirical Investigation
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马铃薯GA2ox家族基因响应赤霉素(GA)和低温胁迫表达分析 被引量:2
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作者 刘计涛 王梦诗 +5 位作者 索海翠 王丽 单建伟 李成晨 安康 李小波 《江苏农业学报》 CSCD 北大核心 2023年第5期1110-1119,共10页
本研究基于结构域筛选马铃薯(Solanum tuberosum)基因组,获得13个StGA2ox基因家族成员。生物信息学分析结果显示,StGA2ox家族基因分为C19和C202个家族,其中C19又分为2个亚族,13个StGA2ox基因不均匀得分布于8条染色体上,其中有5对共线性... 本研究基于结构域筛选马铃薯(Solanum tuberosum)基因组,获得13个StGA2ox基因家族成员。生物信息学分析结果显示,StGA2ox家族基因分为C19和C202个家族,其中C19又分为2个亚族,13个StGA2ox基因不均匀得分布于8条染色体上,其中有5对共线性基因对,7号染色体上有3个基因形成1个串联重复基因簇。此外,StGA2ox启动子区域存在响应低温胁迫、植物激素等多种顺式作用元件。利用实时荧光定量PCR方法分析外源GA_(3)和低温胁迫处理条件下StGA2ox表达模式,所有StGA2ox基因均能够被外源GA_(3)诱导表达,其中StGA2ox2、StGA2ox4、StGA2ox8、StGA2ox9和StGA2ox10受低温胁迫诱导表达显著上调,暗示着这5个基因在调节马铃薯低温胁迫耐性中发挥重要功能,可以作为进一步开展马铃薯耐低温研究的候选基因。 展开更多
关键词 马铃薯 ga2ox基因 生物信息学分析 赤霉素(ga) 低温胁迫
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OsGA3ox通过合成不同活性GA调控水稻育性及株高 被引量:2
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作者 郝小花 胡爽 +6 位作者 赵丹 田连福 谢子靖 吴莎 胡文俐 雷晗 李东屏 《遗传》 CAS CSCD 北大核心 2023年第9期845-855,共11页
赤霉素(gibberellin,GA)是一种重要的激素,参与调控植物多种生长发育过程。GA生物合成通路已基本阐明,其中赤霉素3β羟化酶(gibberellin 3β-hydroxylase,GA3ox)是多种活性GA合成的关键酶。水稻中有2个GA3ox基因(OsGA3ox1和OsGA3ox2),... 赤霉素(gibberellin,GA)是一种重要的激素,参与调控植物多种生长发育过程。GA生物合成通路已基本阐明,其中赤霉素3β羟化酶(gibberellin 3β-hydroxylase,GA3ox)是多种活性GA合成的关键酶。水稻中有2个GA3ox基因(OsGA3ox1和OsGA3ox2),其生理功能虽有初步研究,但它们在合成活性GA调控水稻发育过程中是如何分工协作尚不清楚。本研究通过CRISPR/Cas9技术获得基因编辑突变体ga3ox1和ga3ox2,发现ga3ox1花粉育性显著下降,而ga3ox2株高显著变矮,表明OsGA3ox1是花粉正常发育必需的,而OsGA3ox2是茎叶伸长必需的。组织表达分析表明,OsGA3ox1主要在未开的花中表达,OsGA3ox2主要在未伸长的叶中表达。进一步对野生型(WT)和两个ga3ox突变体未开的花、未伸长的叶及根中的GA进行检测分析,发现OsGA3ox1在花中催化GA9形成GA7与花粉育性密切相关;OsGA3ox2在未伸长的叶中催化GA20形成GA1调控株高;OsGA3ox1在根中催化GA19形成GA20,调控GA3的生成。总之,OsGA3ox1和OsGA3ox2响应发育信号,在不同组织分工协作合成内源GA,调控水稻生长和发育。本研究为阐明OsGA3ox1和OsGA3ox2在GA生物合成中的作用以及深入理解OsGA3ox的功能提供参考。 展开更多
关键词 水稻 赤霉素 赤霉素3β羟化酶基因 功能分析
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High-k gate dielectric GaAs MOS device with LaON as interlayer and NH_3-plasma surface pretreatment 被引量:1
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作者 刘超文 徐静平 +1 位作者 刘璐 卢汉汉 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第12期494-498,共5页
High-k gate dielectric Hf Ti ON Ga As metal-oxide–semiconductor(MOS) capacitors with La ON as interfacial passivation layer(IPL) and NH3- or N2-plasma surface pretreatment are fabricated, and their interfacial an... High-k gate dielectric Hf Ti ON Ga As metal-oxide–semiconductor(MOS) capacitors with La ON as interfacial passivation layer(IPL) and NH3- or N2-plasma surface pretreatment are fabricated, and their interfacial and electrical properties are investigated and compared with their counterparts that have neither La ON IPL nor surface treatment. It is found that good interface quality and excellent electrical properties can be achieved for a NH3-plasma pretreated Ga As MOS device with a stacked gate dielectric of Hf Ti ON/La ON. These improvements should be ascribed to the fact that the NH3-plasma can provide H atoms and NH radicals that can effectively remove defective Ga/As oxides. In addition, La ON IPL can further block oxygen atoms from being in-diffused, and Ga and As atoms from being out-diffused from the substrate to the high-k dielectric. This greatly suppresses the formation of Ga/As native oxides and gives rise to an excellent high-k/Ga As interface. 展开更多
关键词 ga As MOS La ON interlayer NH3-plasma treatment stacked gate dielectric
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Ni-Mn-Ga-Fe合金纤维的马氏体相变与超弹性
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作者 刘艳芬 郎子锐 李爽 《材料工程》 EI CAS CSCD 北大核心 2023年第6期120-130,共11页
通过高真空电弧熔炼炉和熔体抽拉液态成形设备制备Ni-Mn-Ga和Ni-Mn-Ga-Fe纤维,并对纤维进行阶梯式有序化热处理。利用场发射扫描电子显微镜(SEM)、透射电子显微镜(TEM)、射线衍射仪(XRD)对其微结构和相结构进行表征;利用差示扫描量热仪(... 通过高真空电弧熔炼炉和熔体抽拉液态成形设备制备Ni-Mn-Ga和Ni-Mn-Ga-Fe纤维,并对纤维进行阶梯式有序化热处理。利用场发射扫描电子显微镜(SEM)、透射电子显微镜(TEM)、射线衍射仪(XRD)对其微结构和相结构进行表征;利用差示扫描量热仪(DSC)对纤维的马氏体相变过程进行分析;利用动态机械分析仪对纤维的超弹性进行测试。结果表明:有序化热处理后纤维内部原子排列有序性提高,相邻孪晶间沿近90°大角度晶界方向生长,晶界处平直。Fe掺杂使得纤维内部晶粒细化,晶格体积缩小,纤维整体致密性提高。Fe掺杂使得晶格内自由电子数量增多,电子浓度升高,致使马氏体相变(martensitic transformation,MT)的相变温度(M s)明显提高;通过有序化热处理,高温下的自由电子自由排列,形成有差异性的新布里渊区,构成新的孪晶界,进一步提高晶格内部的致密程度。同时Fe具备耐高温、抗拉强度高的特性,Fe掺杂的Ni-Mn-Ga纤维降低了其本征脆性。超弹性曲线显示了热弹性马氏体相变的两个基本特征:完全超弹性(superelasticity,SE)和低温恢复特性。在超弹性实验中,Ni_(50)Mn_(25)Ga_(20)Fe 5纤维在355 K测试温度时达到完全SE;在测试温度T test>M_(s)+8 K时,达到100%的应变恢复率(strain recovery rate),较Ni-Mn-Ga纤维(≈90%)有所提高。与其他合金(如Ti-Ni和Cu-Al-Ni合金)相比,Ni-Mn-Ga-Fe纤维显示出更大的临界应力值和更宽的SE温度空间。 展开更多
关键词 铁磁形状记忆合金纤维 马氏体相变 超弹性 有序化热处理 Ni-Mn-ga多晶合金纤维
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Supercritical gasification for the treatment of o-cresol wastewater 被引量:4
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作者 WEI Chao-hai HU Cheng-sheng WU Chao-fei YAN Bo 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2006年第4期644-649,共6页
The supercritical water gasification of phenolic wastewater without oxidant was performed to degrade pollutants and produce hydrogen-enriched gases. The simulated o-cresol wastewater was gasified at 440-650℃ and 27.6... The supercritical water gasification of phenolic wastewater without oxidant was performed to degrade pollutants and produce hydrogen-enriched gases. The simulated o-cresol wastewater was gasified at 440-650℃ and 27.6 MPa in a continuous Inconel 625 reactor with the residence time of 0.42-1.25 min. The influence of the reaction temperature, residence time, pressure, catalyst, oxidant and the pollutant concentration on the gasification efficiency was investigated. Higher temperature and longer residence time enhanced the o-cresol gasification. The TOC removal rate and hydrogen gasification rate were 90.6% and 194.6%, respectively, at the temperature of 650℃ and the residence time of 0.83 min. The product gas was mainly composed of H2, CO2, CFL and CO, among which the total molar percentage of H2 and CFL was higher than 50%. The gasification efficiency decreased with the pollutant concentration increasing. Both the catalyst and oxidant could accelerate the hydrocarbon gasification at a lower reaction temperature, in which the catalyst promoted H2 production and the oxidant enhanced CO2 generation. The intermediates of liquid effluents were analyzed and phenol was found to be the main composition. The results indicate that the supercritical gasification is a promising way for the treatment of hazardous organic wastewater. 展开更多
关键词 supercritical water gaSIFICATION O-CRESOL hydrogen-enriched gas wastewater treatment
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Prolonged Seed Dormancy in <i>Phyllanthus emblica</i>L. Can Be Overturned by Seed Scarification and Gibberellin Pre Treatment
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作者 S. M. U. P. Mawalagedera G. A. D. Perera S. D. S. S. Sooriyapathirana 《Open Journal of Forestry》 2014年第1期38-41,共4页
Phyllanthus emblica L. is an important constituent of Ayurvedic medicine and a fresh fruit species in the market in Sri Lanka. Therefore, it has a high potential to be established as a commercial fruit crop. The seeds... Phyllanthus emblica L. is an important constituent of Ayurvedic medicine and a fresh fruit species in the market in Sri Lanka. Therefore, it has a high potential to be established as a commercial fruit crop. The seeds of P. emblica are semi orthodox and exhibit a long dormancy period hindering the natural sexual propagation. Therefore, it still remains as an underutilized fruit crop in Sri Lanka due to its lack of quality planting material and poor propagation techniques. Long term dormancy also causes a big challenge in germinating seeds to create populations in breeding programs. In order to promote P. emblica from its underutilized status, what seems most feasible is to develop a method to break up the seed dormancy artificially. In order to do so, the methods of breaking the dormancy of P. emblica seeds have to be studied. Therefore, the aim of this study was to identify a method to break up the seed dormancy of P. emblica. The seeds were extracted from 21 trees belonging to three different districts in Sri Lanka. The selected viable seeds were subjected to four different pre treatments: none treated seeds (i.e. control), seeds scarified, seeds scarified and treated with 1% gibberellin and seed coat removed and followed by seeds treated with 1% gibberellin. From the four treatments, seed dormancy was overturned with a germination percentage of 43% by the seed pre treatment where the seeds were scarified and treated with 1% gibberellin and no other pre treatment methods were successful in breaking the dormancy. This suggests that the natural germination potential of P. emblica seeds is very low and it can be overridden by seed scarification and gibberellin pre treatment. 展开更多
关键词 gibberellin PRE treatment Phyllanthus emblica SEED Dormancy SEED SCARIFICATION
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Gas treatment protection of metallic lithium anode 被引量:1
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作者 李文俊 李泉 +5 位作者 黄杰 彭佳悦 褚赓 陆雅翔 郑杰允 李泓 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第8期8-13,共6页
The effects of different coating layers on lithium metal anode formed by reacting with different controlled atmospheres(argon,CO_2–O_2(2:1),N_2,and CO_2–O_2–N_2(2:1:3))have been investigated.The obtained X... The effects of different coating layers on lithium metal anode formed by reacting with different controlled atmospheres(argon,CO_2–O_2(2:1),N_2,and CO_2–O_2–N_2(2:1:3))have been investigated.The obtained XRD,second ion mass spectroscopy(SIMS),and scanning probe microscope(SPM)results demonstrate the formation of coating layers composed of Li_2CO_3,Li_3N,and the mixture of them on lithium tablets,respectively.The Li/Li symmetrical cell and Li/S cell are assembled to prove the advantages of the protected lithium tablet on electrochemical performance.The comparison of SEM and SIMS characterizations before/after cycles clarifies that an SEI-like composition formed on the lithium tablets could modulate the interfacial stabilization between the lithium foil and the ether electrolyte. 展开更多
关键词 gas treatment lithium metal anode lithium ion battery lithium protection
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Flexible Furnace Concepts for Vacuum Heat Treatment Combined with High-pressure Gas Quenching 被引量:1
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作者 Karl killer Stefan Wiebach 《材料热处理学报》 EI CAS CSCD 北大核心 2004年第5期607-611,共5页
IN the past five years the process combination of vacuum hardening, respectively vacuum carburizing with high-pressure gas quenching was successfully introduced to the market, especially in the manufacture of gears. I... IN the past five years the process combination of vacuum hardening, respectively vacuum carburizing with high-pressure gas quenching was successfully introduced to the market, especially in the manufacture of gears. In the meantime furnace concepts for various applications are available to the industry. In the following report three plant varieties are introduced, which differ in process flexibility and throughput. This report also explains criteria for the selection of a furnace in view of the existing application requirements. Besides this a short introduction is given into the vacuum carburizing process and the high-pressure gas quenching technology. 展开更多
关键词 真空热处理 真空渗碳 高压气体流淬火 炉子
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CO_2 selective hydrogenation to synthetic natural gas(SNG) over four nano-sized Ni/ZrO_2 samples:ZrO_2 crystalline phase & treatment impact 被引量:3
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作者 Min Chen Zhanglong Guo +2 位作者 Jian Zheng Fangli Jing Wei Chu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2016年第6期1070-1077,共8页
Two type zirconia (monoclinic and tetragonal phase ZrO2) carriers were synthesized via hydrothermal route, and nano-sized zirconia supported nickel catalysts were prepared by incipient impregnation then followed therm... Two type zirconia (monoclinic and tetragonal phase ZrO2) carriers were synthesized via hydrothermal route, and nano-sized zirconia supported nickel catalysts were prepared by incipient impregnation then followed thermal treatment at 300 °C to 500 °C, for the CO2selective hydrogenation to synthetic natural gas (SNG). The catalysts were characterized by XRD, CO2-TPD-MS, XPS, TPSR (CH4, CO2) techniques. For comparison, the catalyst NZ-W-400 (monoclinic) synthesized in water solvent exhibited a better catalytic activity than the catalyst NZ-M-400 (tetragonal) prepared in methanol solvent. The catalyst NZ-W-400 displayed more H2absorbed sites, more basic sites and a lower temperature of initial CO2activation. Then, the thermal treatment of monoclinic ZrO2supported nickel precursor was manufactured at three temperature of 350, 400, 500 °C. The TPSR experiments displayed that there were the lower temperature for CO2activation and initial conversion (185 °C) as well as the lower peak temperature of CH4generation (318 °C), for the catalyst calcined at 500 °C. This sample contained the more basic sites and the higher catalytic activity, evidenced byCO2-TPD-MS and performance measurement. As for the NZ-W-350 sample, which exhibited the less basic sites and the lower catalytic activity, its initial temperature for CO2activation and conversion was higher (214 °C) as well as the higher peak temperature of CH4formation (382 °C). © 2016 Science Press 展开更多
关键词 Carbon dioxide Catalyst activity Catalysts Chemical activation Heat treatment HYDROGENATION Natural gas Nickel Organic solvents ZIRCONIA Zirconium alloys
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Fretting Wear Behavior of Medium Carbon Steel Modified by Low Temperature Gas Multi-component Thermo-chemical Treatment 被引量:3
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作者 LUO Jun ZHENG Jianfeng PENG Jinfang HE Liping ZHU Minhao 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2010年第3期288-296,共9页
The introduction of surface engineering is expected to be an effective strategy against fretting damage. A large number of studies show that the low gas multi-component (such as carbon, nitrogen, sulphur and oxygen, ... The introduction of surface engineering is expected to be an effective strategy against fretting damage. A large number of studies show that the low gas multi-component (such as carbon, nitrogen, sulphur and oxygen, etc) thermo-chemical treatment(LTGMTT) can overcome the brittleness of nitriding process, and upgrade the surface hardness and improve the wear resistance and fatigue properties of the work-pieces significantly. However, there are few reports on the anti-fretting properties of the LTGMTT modified layer up to now, which limits the applications of fretting. So this paper discusses the fretting wear behavior of modified layer on the surface of LZ50 (0.48%C) steel prepared by low temperature gas multi-component thermo-chemical treatment (LTGMTT) technology. The fretting wear tests of the modified layer flat specimens and its substrate (LZ50 steel) against 52100 steel balls with diameter of 40 mm are carried out under normal load of 150 N and displacement amplitudes varied from 2 μm to 40 μm. Characterization of the modified layer and dynamic analyses in combination with microscopic examinations were performed through the means of scanning electron microscope(SEM), optical microscope(OM), X-ray diffraction(XRD) and surface profilometer. The experimental results showed that the modified layer with a total thickness of 60 μm was consisted of three parts, i.e., loose layer, compound layer and diffusion layer. Compared with the substrate, the range of the mixed fretting regime(MFR) of the LTGMTT modified layer diminished, and the slip regime(SR) of the modified layer shifted to the direction of smaller displacement amplitude. The coefficient of friction(COF) of the modified layer was lower than that of the substrate in the initial stage. For the modified layer, the damage in partial slip regime(PSR) was very slight. The fretting wear mechanism of the modified layer both in MFR and SR was abrasive wear and delamination. The modified layer presented better wear resistance than the substrate in PSR and MFR; however, in SR, the wear resistance of the modified layer decreased with the increase of the displacement amplitudes. The experimental results can provide some experimental bases for promoting industrial application of LTGMTT modified layer in anti-fretting wear. 展开更多
关键词 fretting wear fretting regimes low temperature gas multi-component thermo-chemical treatment(LTGMTT) modified layer medium carbon steel
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Effects of Mild Hyperthermia Treatment Using Nano-Mist Sauna on Blood Gas Parameters and Skin Appearance
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作者 Takayoshi Hayakawa Mayumi Watanabe +4 位作者 Chikako Tomiyama Ayaka Sasagawa Takashi Honma Akihiro Inada Toru Abo 《Health》 2018年第5期577-586,共10页
Physicians often observe patients’ complexion (their natural skin color) as an indicator of health. The complexion may depend on the internal environment, however, very few researchers studied its evidence. We previo... Physicians often observe patients’ complexion (their natural skin color) as an indicator of health. The complexion may depend on the internal environment, however, very few researchers studied its evidence. We previously reported various benefits of a mild hyperthermia treatment on human health using the nano-mist sauna (NMS), including acceleration of gas exchange (O2 and CO2) in the venous blood, enhancement of immunity, and the modulation of autonomic nervous system. However, the effects of NMS on skin appearance are unknown. There is a historical and widespread belief that mild hyperthermic treatments such as hot springs are good for improving skin appearance. However, the effect of NMS on the skin appearance has not been examined. In the present study, we examined the color of venous blood using the CIELAB (a color space specified by the French Commission internationale de l’éclairage) method, and then compared the color changes before and after NMS stimulation. Next, we examined correlations of blood gas parameters with color elements of the venous blood, which are highly dependent on oxygen. Our results suggest that the colors and appearance of the face depend on the internal environment, because there are numerous vessels under the skin. Thus, the color of the venous blood may provide medical evidence of changes in complexion. This new method may be useful for assessment of medical complexion by physicians, for use in determining internal health based on skin color information. 展开更多
关键词 Nano-Mist SAUNA HYPERTHERMIA treatment Medical Complexion Blood gas Color COMMISSION Internationale de L’éclairage
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赤霉素不同浓度及处理方式对青藏高原柴达木盆地盐爪爪种子萌发的影响 被引量:1
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作者 拉本 胡娟 +3 位作者 张旭萍 刘强 王锦 胡笑玫 《中国野生植物资源》 CSCD 2024年第5期63-67,76,共6页
目的:探究两种赤霉素处理方式、不同赤霉素浓度对盐爪爪种子萌发指标的影响,旨在得出不同因素对盐爪爪萌发的作用效果,寻求提高盐爪爪萌发的最适条件。方法:采用培养皿纸上萌发法,统计种子萌发情况,计算萌发率、萌发势、萌发指数等指标... 目的:探究两种赤霉素处理方式、不同赤霉素浓度对盐爪爪种子萌发指标的影响,旨在得出不同因素对盐爪爪萌发的作用效果,寻求提高盐爪爪萌发的最适条件。方法:采用培养皿纸上萌发法,统计种子萌发情况,计算萌发率、萌发势、萌发指数等指标。结果:(1)在提前浸种组内,随着赤霉素浓度的增加,盐爪爪种子的萌发率、萌发势、萌发指数3项萌发指标也随之增加,但萌发指标小于对照组;(2)在每日滴加组内,赤霉素浓度的变化对盐爪爪种子的萌发不具有显著影响,萌发指标均高于对照组;(3)赤霉素浓度在200~1000 mg/L之间时,每日滴加的处理方式下盐爪爪种子萌发率在92.22%~98.89%之间,提前浸种组处理方式下盐爪爪种子萌发率在56.67%~80.00%之间,前者显著高于后者。结论:(1)在提前浸种组内,低浓度的赤霉素不具有促进盐爪爪种子萌发的作用;(2)在每日滴加组内,200~1000 mg/L的赤霉素对盐爪爪种子的萌发指标均具有促进作用;(3)赤霉素浓度在200~1000 mg/L之间时,每日滴加的方式更适用于盐爪爪种子的萌发。 展开更多
关键词 赤霉素 处理方式 盐爪爪 种子萌发
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4Cr5MoSiV1热作模具钢循环渗氮及热疲劳行为研究 被引量:2
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作者 刘海建 韩笑 陈杰 《热加工工艺》 北大核心 2024年第2期24-29,共6页
针对4Cr5MoSiV1热作模具钢在使用过程中经受熔融铝液及冷却液的循环冲击,在热应力作用下容易产生热疲劳失效的问题。采用可控循环气体渗氮的方法分别在回火态和热疲劳态模具钢表面制备无铁氮化合物和有化合物的渗层,进行热疲劳性能测试... 针对4Cr5MoSiV1热作模具钢在使用过程中经受熔融铝液及冷却液的循环冲击,在热应力作用下容易产生热疲劳失效的问题。采用可控循环气体渗氮的方法分别在回火态和热疲劳态模具钢表面制备无铁氮化合物和有化合物的渗层,进行热疲劳性能测试。结果表明:循环渗氮制备的无化合物的渗层可以有效延缓热疲劳裂纹的萌生,抗热疲劳性能优于有化合物的渗层。同时,在裂纹产生前进行二次渗氮可以补充氮原子,重置压应力并增加硬度,进一步提升热疲劳抗性。 展开更多
关键词 热作模具钢 可控循环气体渗氮 铁氮化合物 热疲劳性能
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气负荷变化对天然气净化工艺及经济性的影响研究分析
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作者 邱敏 胡小英 +2 位作者 刘晓辉 聂斌 吕莉 《四川化工》 CAS 2024年第3期28-32,53,共6页
天然气净化装置气负荷变化对装置运行的稳定性和天然气处理成本具有重要的影响。对川西北气矿两个气源气质相似的天然气净化厂的气负荷变化对装置运行的影响及经济性进行研究分析。结果表明:120%超负荷运行的A厂装置运行工艺参数与设计... 天然气净化装置气负荷变化对装置运行的稳定性和天然气处理成本具有重要的影响。对川西北气矿两个气源气质相似的天然气净化厂的气负荷变化对装置运行的影响及经济性进行研究分析。结果表明:120%超负荷运行的A厂装置运行工艺参数与设计参数偏差不大,装置能够稳定运行,尾气SO_(2)排放浓度稳定且低于国家标准,天然气处理成本为0.014元/m^(3);B厂受气藏储量影响,气负荷持续走低,装置运行稳定性降低,导致尾气SO_(2)排放出现超标情况,装置运行能耗增加,天然气处理成本达到0.092元/m^(3),是A厂处理成本的6.6倍,天然气净化的经济性显著降低。 展开更多
关键词 气负荷 变化 天然气 净化 脱硫 硫磺回收 尾气处理 成本
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液化气脱硫醇装置尾气治理改造及运行总结
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作者 张飞 刁青国 刘健 《山东化工》 CAS 2024年第10期273-277,共5页
针对中国石化济南分公司液化气脱硫醇装置尾气治理部分工艺流程存在的一些问题,对尾气治理部分工艺流程进行了升级改造,实现了脱硫醇尾气“零排放”,同时对运行期间主要设备出现的异常情况进行了原因分析,并进行相应的处置措施,确保装... 针对中国石化济南分公司液化气脱硫醇装置尾气治理部分工艺流程存在的一些问题,对尾气治理部分工艺流程进行了升级改造,实现了脱硫醇尾气“零排放”,同时对运行期间主要设备出现的异常情况进行了原因分析,并进行相应的处置措施,确保装置平稳安全运行。 展开更多
关键词 液化气脱硫醇 尾气治理 升级改造 安全运行
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炭质泥岩地层隧道瓦斯突出成因及处治措施研究
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作者 田娇 杨洪 杨智成 《公路交通技术》 2024年第4期158-165,共8页
为解决炭质泥岩地层隧道瓦斯突出问题,依托兰州至海口国家高速公路重庆至遵义段(贵州境)扩容工程桐梓隧道,通过现场调查和理论分析,总结了该隧道瓦斯突出动力现象及特点,分析了其瓦斯突出的规律以及影响因素,提出了钻孔泄压方案及处治... 为解决炭质泥岩地层隧道瓦斯突出问题,依托兰州至海口国家高速公路重庆至遵义段(贵州境)扩容工程桐梓隧道,通过现场调查和理论分析,总结了该隧道瓦斯突出动力现象及特点,分析了其瓦斯突出的规律以及影响因素,提出了钻孔泄压方案及处治措施。结果表明:经处治后,炭质泥岩施工掌子面的动力现象有了明显减少和减弱,工程施工基本不受影响,表明了该处治措施的效果较好。研究结果可供炭质泥岩地层及其他非煤系地层瓦斯隧道的设计和施工参考。 展开更多
关键词 炭质泥岩地层 公路隧道 瓦斯突出 处治措施
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肺康复综合治疗对慢性阻塞性肺疾病急性加重期患者肺功能及运动能力的影响研究
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作者 王丽 罗明 +1 位作者 文礼 翁惠 《山西中医药大学学报》 2024年第6期645-649,共5页
目的:探讨肺康复综合治疗对慢性阻塞性肺疾病急性加重期(AECOPD)患者肺功能及运动能力的影响。方法:110例AECOPD患者随机分为对照组与观察组,每组55例。两组均给予常规治疗,对照组在此基础上给予孟鲁司特钠片治疗,观察组在对照组基础上... 目的:探讨肺康复综合治疗对慢性阻塞性肺疾病急性加重期(AECOPD)患者肺功能及运动能力的影响。方法:110例AECOPD患者随机分为对照组与观察组,每组55例。两组均给予常规治疗,对照组在此基础上给予孟鲁司特钠片治疗,观察组在对照组基础上采用肺康复综合治疗。比较两组患者ICU住院时间、总住院时间、住院病死率、生活质量评分、第1秒用力呼吸容积(FEV1)、FEV1/最大呼气容积(FVC)、氧分压(PaO_(2))、二氧化碳分压(PaCO_(2))、C反应蛋白(CRP)及α1-抗胰蛋白酶(α1-AT)水平。结果:与治疗前比较,两组FEV1、FEV1/FVC、Pa0_(2)升高,PaCO_(2)降低,差异有统计学意义(P<0.01);治疗后观察组上述指标优于对照组(P<0.01)。CRP及α1-AT水平均明显低于本组治疗前(P<0.01),观察组治疗后CRP明显低于对照组治疗后(P<0.01),差异均具有统计学意义。治疗后观察组总体健康、日常生活能力、疼痛、性生活、积极感受及对医疗手段的依赖评分均明显高于本组治疗前及对照组治疗后(P<0.05,P<0.01)。观察组ICU住院时间、总住院时间及病死率均明显小于对照组(P<0.05,P<0.01)。结论:肺康复综合治疗AECOPD疗效显著,临床应加以推广。 展开更多
关键词 慢性阻塞性肺疾病 急性加重期 肺康复综合治疗 肺功能 血气指标
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一种新型绿色汞清洗剂的应用研究
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作者 文韵豪 雷华 +2 位作者 李庆 杨紫晴 张烜玮 《石化技术》 CAS 2024年第2期13-15,12,共4页
主要研究了一种二烷基二硫代次膦酸盐和乙醇组成的汞清洗剂,利用二烷基二硫代次膦酸盐与汞形成配位化合物、采用乙醇作为溶剂体系,在溶剂和配位体作用下,可以让大汞珠转变为细微的配位体颗粒物,分散于乙醇中,无搅拌情况下剥离沉积在壁... 主要研究了一种二烷基二硫代次膦酸盐和乙醇组成的汞清洗剂,利用二烷基二硫代次膦酸盐与汞形成配位化合物、采用乙醇作为溶剂体系,在溶剂和配位体作用下,可以让大汞珠转变为细微的配位体颗粒物,分散于乙醇中,无搅拌情况下剥离沉积在壁面的汞,并实现了对沉积于设备内壁的汞的清洗。该工艺的含汞配位体通过简单过滤实现与清洗剂分离,汞清洗剂可循环利用,含汞物可作固废处理,而且所用的清洗剂不腐蚀设备,是一种绿色汞清洗剂。分析了影响洗汞效果的各种因素,得到了最优的洗汞工艺:2%的浓度,保持中性或弱碱性,室温处理,漫灌浸泡不少于6hr。 展开更多
关键词 含汞天然气 处理设备 清洗剂 非氧化化学处理 二烷基二硫代次膦酸盐
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市政污水生化处理过程中曝气控制系统研究进展
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作者 操家顺 叶添 徐润泽 《水处理技术》 CAS CSCD 北大核心 2024年第2期7-13,共7页
为了促进污水处理厂(WWTPs)的低碳可持续运营管理,近年来致力于改善出水质量、削减运营成本和降低温室气体排放的智能曝气控制技术蓬勃发展,但关于可持续污水处理厂的最佳曝气控制策略尚未达成共识。系统综述了曝气过程中溶解氧浓度对于... 为了促进污水处理厂(WWTPs)的低碳可持续运营管理,近年来致力于改善出水质量、削减运营成本和降低温室气体排放的智能曝气控制技术蓬勃发展,但关于可持续污水处理厂的最佳曝气控制策略尚未达成共识。系统综述了曝气过程中溶解氧浓度对于N2O释放的影响,通过分析对比不同曝气控制策略的差异及优缺点,提出曝气控制策略进一步优化的建议,为实现市政污水处理厂溶解氧的综合科学管理提供理论支撑,旨在为污水处理行业提供科学依据和技术支持,促进环境保护和可持续发展。在曝气控制系统中加入N2O排放量化模型来实现出水水质、曝气能耗、温室气体排放三者之间的平衡是未来的关键研究方向,需开发更准确、更合适的温室气体量化模型、灵活的控制方法和智能曝气策略,以满足污水处理厂更多的需求。 展开更多
关键词 污水处理 智能曝气 溶解氧控制 温室气体排放 碳排放量化
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