mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
知识管理与组织绩效关系的实证研究--基于组织文化的视角

知识经济时代的来临使得知识被认为是组织资产中最重要的经济资产,并引起众多的学者关注知识管理相关问题的研究,但鲜有探讨不同组织文化类型下的知识管理与组织绩效的关系.本文针对这一问题提出了一个研究架构,并通过国内的实证结果进行了具体的实证研究
论工资性收入占国民收入比例的演变

本文借助一个具有凯恩斯一哈罗德特征的非均衡宏观动态模型,研究工资性收入占国民收入比例的演变规律.我们发现,在二元经济结构下,过剩的劳动力供给使得工资增长缓慢,从而导致国民收入中工资性收入比例的不断降低.然而,随着经济的增长,对劳动力的需求将不断上升,工资将逐渐恢复对劳动力市场上供求关系的反映,从而工资率会随经济的增长上升更快,这使得工资性收入占国民收入比例下降的趋势得到逆转.整个过程如同一条正U型曲线
"浙商"应对危机、创新发展应对危机、创新发展木----中日比较和借鉴

造成危机的根源是"贫"和"伪",以及由贪和伪造成的要素资源短缺、生态环境恶化、经济格局严重失衡和发展方式难以为继等.在后危机时期,这些根源仍然存在,短期应对危机掩盖了许多问题,甚至加剧一些矛盾,需要创新发展.为此,应该将是科学的思路和方法与人文的思路和方法相结合.通过中日以及日美和中关等的比较,可以借鉴许多有益的经验教训,更好地创新发展
Photoluminescence from site-selected coupling between quantum dots and microtoroid cavities

By using CdSe/ZnS quantum dots (QDs), we study the effect of cavity quantum electrodynamics on the coupling of the microtoroid cavity. When with whispering gallery (WG) modes, the microtoroid cavity demonstrates high quality factor and small mode volume at visible wavelengths. Accordingly, fiber tapers allow QDs to adhere into the cavity and further permit the control of site-selected coupling. From the luminescence spectra, QDs are modulated effectively by cavity modes. Variable modulations are observed by changing QD coupling conditions. Therefore, based on experimental and theoretical research, strong and tunable Purcell enhancement can be realized by this system.
Novel image fusion method based on discrete fractional random transform

We introduce a new spectrum transform into the image fusion field and propose a novel fusion method based on discrete fractional random transform (DFRNT). In DFRNT domain, high amplitude spectrum (HAS) and low amplitude spectrum (LAS) components carry different information of original images. For different fusion goals, different fusion rules can be adopted in HAS and LAS components, respectively. The proposed method is applied to fuse real multi-spectral (MS) and panchromatic (Pan) images. The fused image is observed to preserve both spectral information of MS and spatial information of Pan. Spectrum distribution of DFRNT is random and uniform, which guarantees that good information is reserved.
去氢甲睾酮抗体的制备与鉴定

目的制备兔抗去氢甲睾酮(DMT)抗体,为采用免疫法分析食品中该激素的残留提供基础.方法:采用碳二亚胺法将肟化后的DMT分别偶联到钥孔血蓝蛋白、鸡卵清蛋白和牛血清白蛋白蛋白载体上,制备完全抗原,并利用薄层层析法、红外和紫外光谱法对其进行确证后,免疫新西兰大白兔;通过间接ELISA法测定和比较2种兔抗血清的效价、IC50及交叉反应率.结果:成功制备了DMT的完全抗原,其抗体效价分别为1:64 000(KLH-DMT)和1:256 000(OVA-DMT), IC50值分别为0.24 yg/L和5.29g/L;抗血清与丙酸睾酮酯、群勃龙的IC,.值均大于781. 25g/L.结论:制备的 DMT完全抗原具有较高的免疫原性,抗体与类似物丙酸睾酮酯、群勃龙无明显的交叉反应,可用于ELISA实验.
人IL-16基因重组腺病毒载体的构建与鉴定

目的构建并鉴定人白细胞介素16(IL-16)的重组腺病毒pAd-IL-16表达载体,为进一步研究IL-16功能奠定基础.方法:分离正常人外周血单个核细胞(PBMC),组胺刺激后提取总RNA, RT-PCR扩增IL-16基因,将其克隆到含有绿色荧光蛋白(GFP)标记的腺病毒穿梭质粒pAdTrack-CMV后,再与腺病毒骨架质粒pAdEasy-l共转化BJ5183细菌,获得重组腺病毒载体pAd-IL-16,转染HEK 293T细胞包装病毒.荧光显微镜下观察细胞内绿色荧光,测定病毒效价, RT-PCR和 Westem blot分别分析细胞内IL-16 mRNA和蛋白质的表达.结果:经双酶切及基因鉴定,重组穿梭质粒和重组腺病毒质粒均见约400 bp插入片段,测序结果和GenBank中的基因序列一致;重组病毒效价为2.8×l0~8 pfu/mL;重组病毒感染后, HEK 293T细胞中IL-16mRNA和蛋白质均有表达.结论:成功构建IL-16重组腺病毒载体,并可在HEK 293T细胞中表达,为进一步研究IL-16的功能奠定了基础.
Microstructure and mechanical properties of AZ61 Mg alloy prepared by multi directional forging

AZ61Mg alloy was multi directionally forged (MDFed) during decreasing temperature condition from 643 K to 483 K at a true strain rate of 3×10~(-3) s~(-1) up to cumulative strain of ∑△ε=4.0 at maximum. A pass strain of △ε=0.8 was employed. While average grain size decreased gradually with increasing cumulative strain, the evolution of fine-grained structure strongly depended on the MDF temperature. Under the condition where the temperature was higher than the most adequate one, grain coarsening partially took place during MDF. In contrast, at lower temperature, inhomogeneous microstructure composed of the initial coarse and newly appeared fine grains was evolved. After straining over ∑△ε=3.2 (i.e., over 4 passes of MDF), equiaxed ultrafine grains (UFGs) having average size of about and lower than 1 μm were uniformly evolved. While the MDFed alloy to ∑△ε=4.0 possessed relatively high hardness of HV 99, and it accepted further about 20% cold rolling almost without cracking. Because of the superior formability of the UFGed AZ61Mg alloy, the hardness was further easily raised to HV 120 by following cold rolling.
Wrinkling behavior of magnesium alloy tube in warm hydroforming

In tube hydroforming with axial feeding, under the effect of coupled internal pressure and axial stress, wrinkles often occur and affect the forming results. Wrinkling behavior of an AZ31B magnesium alloy tube was experimentally investigated with different loading paths at different temperatures. Features of wrinkles, including shape, radius and width, were acquired from the experiments, as well as the thickness distribution. Numerical simulations were carried out to reveal the stress state during warm hydroforming, and then the strain history of material at the top and bottom of the wrinkles were analyzed according to the stress tracks and yielding ellipse. Finally, effects of loading paths on expansion ratio limit of warm hydroforming were analyzed. It is verified that at a certain temperature, expansion ratio limit can be increased obviously by applying a proper loading path and realizing enough axial feeding.
对蔬菜生产宏观调控的重要性

泽州县的蔬菜生产经过多年的努力有了极大发展, 如何在新形势下应对我国加入WTO带来的新挑战, 如何在建设社会主义新农村、构建和谐社会中发挥蔬菜产业的积极作用, 是我们当前必须认真研究和解决的问题.
Pseudo Frame Decompositions in a Hilbert C~*-module H

In the paper, we introduce weak Bessel sequences and weak frames in a Hilbert C~*-module H, and give a characterization of weak Bessel sequences, weak frames, normalized tight weak frames, and dual weak frames to each other, respectively. Using A-valued linear bounded operator U:H→l2(A), V~*U=I, a coustructing method of dual weak frame {x~*_j:j∈J}for a given weak frame{xj:j∈J}is obtained. Moreover, pseudo frame decompositions for H is given.
Two new 5α-adynerin-type compounds from Parepigynum funingense

A new 5α-adynerin-type cardenolide, named funingenoside U (1), together with its aglycone, (17R)-3β-hydroxy-4β-acetoxy-8, 14β-epoxy-5α-card-20(22)-enolide, was isolated from the roots of Parepigynumfuningense. Their structures were established on the basis of spectral (MS, 1D and 2D NMR) measurements and chemical evidences.
Novel synthesis of N-substituted-calix[4]azacrown derivatives

A novel series of calix[4]azacrown derivatives with the reaction between calix[4]azacrown and the different fluorophore derivatives, which may be useful fluorescent receptors, have been synthesized and structurally characterized by IR, ~1H NMR, ~(13)C NMR and MS. From their analysis data, it was found those compounds adopted a cone conformation.
Stereoselective synthesis and crystal structure of 4,6-O-benzylidene-N-octyl-D-allosamine hydrochloride

The building block of N-alkyl derivative of allosamidin (chitinase inhibitor), 4,6-O-benzylidene-N-octyl-D-allosamine hydrochloride was stereoselectively synthesized in two steps under mild conditions. Nucleophilic addition of octylamine to 2-oxoglucopyranoside gave a 'carbonyl group transfer' product in 62% yield. Subsequent stereoselective reduction of newly formed C=O with NaBH4 produced title compound in 75% yield. X-ray diffraction analysis indicates the title compound adopts syn 1, 2, 3 stereochemistry and chair-chair conformation. The crystal structure is stabilized by hydrogen bonds.
A new alkylene dihydrofuran glycoside with antioxidation activity from the root bark of Morus alba L

A new alkylene dihydrofuran glycoside (1) was isolated from the root bark of Morus alba L., along with moracin M-3'-O-β-D-glucopyranoside (2), and moracin M-6, 3'-di-O-β-D-glucopyranoside (3). Compound 1 was identified as 2-methylene-3-methoxy-2, 5-dihydrofuran-4-O-β-D-glucopyranoside on the basis of chemical and spectroscopic data including 1D and 2D NMR spectral analysis. In addition, the antioxidant activity of 1 was evaluated using the 1,1 -diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azinobis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS) assay. The IC_(50) values were 2.49 and 0.45 mg/mL, respectively.
把课堂放到学生口袋里的尝试--新一代教学课件"移动课堂"在本科教学中的创建和使用

本科教学是最能体现高校教书育人功能的环节.各高校往往都需要花很大的精力保证本科教学质量,教育部也会组织本科教学指导评估,以促进各高校不断提高本科教学质量,本科教学目前国内外最普遍的教学形式还是课堂教学.课堂教学需要4个要素:教室、教师、学生和课件,教室提供了一个相对独立的空间让教师通过课件把知识传授给学生.显见,课件是教师传授知识的载体.半个好的课件对于提高教学质量至关重要.
类风湿关节炎患者外周血IFN-λ1的表达水平

类风湿关节炎(theumatoid arthritis, RA)是一种主要累及外周关节的慢性、系统性自身免疫病,以滑膜和关节炎症反应,间质组织胶原纤维蛋白样变性和骨质疏松为特征.病理是慢性滑膜炎,滑膜组织的CD4~+T细胞和巨噬细胞可产生多种细胞因子,如IL-1、IL-2、IFN-γ、 TNF-a、IL-6和IL-8等,使关节处于慢性炎症状态,破坏关节软骨和骨,造成关节畸形.自身兔疫机制非常复杂,目前病因尚有争议.
大肠杆菌β-半乳糖苷酶ED片段与人B型钠尿肽抗原的共表达

B型钠尿肽(B-type natriuretic peptide, BNP)又称脑钠肽(brain natriuretic peptide),是心室分泌的激素样短肽,具有利尿利钠效应,能够舒张血管、抑制醛固酮分泌及肾素活性….血浆BNP水平已被证实是充血性心力衰竭诊断和预后判断的生物标志物.基于大肠杆菌B-半乳糖苷酶酶受体(EA)和酶供体(ED),并利用其仪·互补功能建立的克隆酶供体免疫分析(CEDIA)技术属于均相酶免疫技术,具备在自动生化分析仪开展项目的潜力.
雷公藤研究新进展

雷公藤TriPterygium wilfordii系卫矛科雷公藤属木质藤本植物.雷公藤作为一种传统中药, 所含化学成分复杂, 具有多种药理活性, 被广泛用于治疗类风湿关节炎、肾小球肾炎红斑狼疮等自身免疫性疾病及各种皮肤病, 是目前国内外研究的热点天然药物之一.对近年来雷公藤的活性成分、质量控制、药理活性及毒性等研究新进展进行概述: 其中雷公藤的有效成分和毒性成分的研究是雷公藤制剂减毒研究的首要条件.其次财雷公藤的活性成分进行结构修饰.降低其毒性而又不影响、甚或增加其疗效则具有重要的研究价值.
两例甲型HIN1流感患者酶学变化

目前国内外甲型HIN1流感发病率仍呈上升势态,防治工作依然严峻;然而诸多报道中尚未发现以心肌酶学改变为主报道.本报道2例均为健康少年患者,既往体健,患甲型HIN1流感之前无任何遗传病史及其他疾病史,2例均有轻度乏力及发热,但发热程度不同,前者发热最高38.3℃,后者为40.2 ℃,但持续时间均未大于3d,经过达菲和中药莲花清瘟胶囊治疗后,体温和其他症状均有好转,两者均无心慌、气短,乏力也为一过性且体温正常后好转,活动自如,查体未见异常,经拟诊心肌炎证据尚不十分充足,但考虑心肌酶CPK-MB改变,不能除外心肌损伤,给予辅酶Ql0、肌苷等治疗3d后酶学恢复正常.
2020年中国粮食需求结构分析及预测:----基于营养标准的视角

本文在分析中国粮食需求用途结构和品种结构变化特征的基础上, 从合理营养标准的视角确定人均食物需求, 预测了2020年中国主要粮食用途和品种的需-数量. 预测结果表明, 中国粮食需求总量稳步增长, 2020年达到约6.1亿吨; 需求结构将发生明显变化, 饲料用粮预计达到2.98亿吨, 将取代口粮在中国粮食用途中排第一位; 玉米需求量预计达到2.3亿吨, 将超过稻谷成为未来中国粮食消费的最主要品种.
The hydrological effect between Jingjiang River and Dongting Lake during the initial period of Three Gorges Project operation

Based on the measured hydrological data from 1951 to 2008, the chain hydrological effect between Jingjiang River and Dongting Lake is analyzed by comparative method after the Three Gorges Project operation. The result indicates that 1) the scouring amount in Jingjiang River made up 78.9% of the total from Yichang to Chenglingji, and its average scouring intensity was higher than the latter; 2) the water and sand diversion rates at the three outlets of the Jingjiang River were reduced by 2.33% and 2.78% separately; 3) the proportion of multi-year average runoff and sediment through the three outlets in the total into the Dongting Lake decreased by 7.7% and 24.4% respectively; 4) in Dongting Lake, the speed of sediment accumulation was lowered by 26.7%, in flood season, the runoff amount was 20.2% less than the multi-year average value, leading to seasonal scarcity of water year by year. The former prolonged the lake life, while the latter induced droughts in summer and fall in successive years, shortage of drinking and industrial water, shipping insecurity, as well as ecological problems such as decrease of birds and quick increase of Microtus fortis; 5) The multi-year average values of sediment and flood transporting capacity at the lake outlet were respectively increased by 26.6% and 3.7%, the embankments were protected effectively. Then, to adapt to the new change of the river-lake relation, some suggestions were put forward, such as optimizing further operation program of the Three Gorges Reservoir, reexamining the idea of river and lake regulation, and maintaining connection of the river and the lake.
The influence of water regulation on vegetation in the lower Heihe River

Water regulation has been carried out by the Heihe River Bureau since 2000, which aims to address the existing eco-environmental problems in the lower Heihe River. In the past nine years, great changes in spatial-temporal distribution of water resources took place in the lower Heihe River. In order to objectively evaluate the influence of water regulation on the eco-environment, the changes of groundwater table, typical vegetation, landscape types as well as East Juyan Lake have been analyzed in the lower Heihe River, by means of field surveys and remote sensing. These results indicate that there are obvious effects of water regulation on the eco-environment, which has been improved toward sustainability in the lower Heihe River.
Factors of spatial distribution of recreation areas in peri-urban Beijing

Based on the case study of peripheral urban areas in Beijing, this paper aims to identify the factors which will influence the spatial distribution of peri-urban recreation areas, by analyzing the collected data from questionnaires, online survey, documentation and field investigations (2007). In order to achieve sound information, relevant data from different management departments, owners and land-use types involved in the case study area are collected. A sampling database for peri-urban recreation areas in Beijing is established, and GIS spatial analyses as well as statistic analyses are applied. The result indicates that spatial distribution of recreation areas is majorly influenced by four factors, e.g. tourism attractions and environmental conditions, policy and spatial governance, consumption demand and preference, land price and availability. Tourism attractions and environmental conditions are dominant factors for public recreation areas. Commercial recreation areas are highly related with accessibility. Agricultural recreation areas are usually attached to special farmlands near large-scaled scenic areas. Meanwhile, recreational business clusters have appeared in suburbs influenced by mass recreation market growth. Controlled by the land price, commercial recreation areas are differentiated on their scales and developing intensity. Policy and spatial governance have made arrangements of recreation areas more balancing and more human-oriented. A peri-urban recreation area model is therefore established on the basis of this analysis, which can guide urban planning and designing, land-use planning and recreation resource development.
Variation and abrupt change of climate in Ili River Basin, Xinjiang

In this paper, the monthly precipitation and temperature data collected at 7 stations in the lli River Basin from 1961 to 2007 were analyzed by means of simple regression analysis, running mean, db6 wavelet function and Mann-Kendall test. This study revealed the characteristics of climate change and abrupt change points of precipitation and temperature during different time scales in the lli River Basin within the past 50 years. The results showed that the precipitation increased from the mid-1980s until 2000 and has continued to increase at a smaller magnitude since 2000. Over the studied period, the precipitation increased significantly during the summer and winter months. The temperature increased greatly in the late 1980s, and has continued to show an increasing trend from the year 2000 to present. The temperature increases were most significant during the summer, autumn and winter months. In terms of different geographies, the temperature increase was significant during the winter in the plains and hilly regions; the increase was also significant during autumn in the intermontane basins. The climate change trends in the lli River Basin were consistent with the changing trends of the North Atlantic Oscillation and the plateau monsoon.
The progress and prospects of nebkhas in arid areas

Nebkhas are often extensively distributed in arid and semi-arid areas, and play an important role in the stabilization of ecological environment in these areas. This paper reviews the following aspects, including formation and succession, spatial distribution, shape and surface airflow characteristics, balance between erosion and deposition, ecological and physiological characteristics of vegetation, response to precipitation and groundwater, soil properties as well as the protection measures. We found that nebkhas were studied without differentiation of succession periods, and shape characteristics, surface airflow, soil properties as well as vegetation dynamics in different succession periods were not fully understood, which made it difficult to explain the succession dynamics of nebkhas and its affecting factors. Previous studies of nebkhas were over-emphasized for its role as an indicator of land degradation, while its ecological functions in degraded ecosystems were neglected, which was unfavorable for the ecological restorations in arid and semi-arid areas. Future studies should pay more attention to the variation of vegetation, soil as well as hydrological process in the succession of nebkhas and its interaction between different influencing factors. In addition, positive role of nebkhas in degraded ecosystems in arid and semi-arid areas should be fully discussed. According to the data got from the above, effective protection measures of nebkhas should be explored.
A new species of Leptocycas (Zamiaceae) from the Upper Triassic sediments of Liaoning Province, China

A new cycad, Leptocycas yangcaogouensis sp. nov., was found in sediments from the Late Triassic in western Liaoning, China. The pinnately compound leaves (Pseudoctenis type) are screwed in a crown on the stem top. The leaflets are linear, with parallel veins and decurrent bases on the rachis. The leaf bases are persistent. The cataphylls intermix with the leaves. The female cone is ovoid in shape. The characteristics of the new plant are more similar to those of Leptocycas gracilis, a Triassic cycad from North America, but the new species differs from L. gracilis in the size of its stem (7-8 vs. 3-5 cm in diameter, respectively), leaves (length x width 100 x 16 vs. 30 x 7 cm, respectively) and leaf density along the stem (4-6 vs. 1-2 bases/1 cm length, respectively). Both L. gracilis and L. yangcaogouensis, having leaves of the Pseudoctenis type, show a closer relationship to the extant Dioon of Zamiaceae. The present study provides evidence for the origin of the genus Dioon, which may have come from Leptocycas plants of the Triassic. It would be assumed that the extent cycads in Zamiaceae originate from the pteridosperms in the Late Paleozoic and have evolved through the stage of L. gracilis and L. yangcaogouensis in Late Triassic, and reaching the extant Dioon.
Genetic variation of Ardisia crenata in south China revealed by nuclear microsatellite

Ardisia crenata Sims, one of the most widely distributed Ardisia in the world, is an important ornamental and medicinal plant species. Using seven polymorphic nuclear microsatellite loci, we studied the genetic variation of 20 natural populations of A. crenata across its distribution center in south China. Significant deviation from the Hardy-Weinberg equilibrium in all populations and at all loci were detected, and the fixation index was high (F_(IS) = 0.725), indicating that inbreeding may be dominant in the mixed mating system of this self-compatible species. The average genetic diversity within populations was relatively low (Hs = 0.321). There was significant genetic differentiation among populations (F_(ST) = 0.583), which may have resulted from a high level of inbreeding and a low level of gene flow. Ardisia crenata in south China can be roughly divided into an eastern group and a western group, consistent with the floristic division of the Sino-Himalayan forest subkingdom and the Sino-Japanese forest subkingdom. There may be separated glacial refugia in each region.
药根碱的研究进展

药根碱(Jatrorrhizine)是从防己科(Menispermaceae)植物青牛胆Tinospora sagittata (Oliv.)Gagnep, 毛茛科(Ranunculaceae)植物黄连Coptis chimensis Franch等植物中分离到的一种四氢异喹啉生物碱. 文章综述了近年来药根碱的研究进展, 包括其分布、检测方法、药理活性、及制剂应用等方面的内容, 为进一步研究提供参考依据.
孟诜对食疗方术的贡献

孟诜系唐代医药学家, 擅于药物研究, 重视收集医方和饮食疗法, 继承和发展了食疗方术, 并著成<<补养方>>流传后学, 经补充不足而名为<<食疗本草>>, 成为饮食疗法的第一部专著, 为食疗医学的发展作出了突出贡献.
黄芩素药理学研究新进展

黄芩为常用中药, 味苦、性寒, 归肺、心、肝、胆、大肠经, 具有清热泻火、燥湿解毒的功效. 黄芩的有效成分之一----黄酮类化合物黄芩素, 具有抗菌、抗病毒、抗炎、抗氧化、抗肿瘤、抗纤维化及心脑血管、神经元保护等药理作用, 提示黄芩素具有多层次、多途径、多靶点的药理活性作用, 黄芩药源丰富, 功效广泛, 未见明显毒性作用报道, 值得进一步研究开发.
溃克灵对溃疡性结肠炎模型大鼠外周血和肠系膜淋巴结CD_4+ CD_(25)~+ T细胞亚群的影响

目的建立溃疡性结肠炎(UC)大鼠模型, 研究溃克灵(KKL)对大鼠UC的治疗作用及对大鼠外周血和肠系膜淋巴结CD_4~+ CD_25~+ 调节性T细胞的影响, 探讨KKL防治UC的作用机理. 方法采用2, 4, 6-三硝基苯磺酸(TNBS)法(100 mg/kg TNBS+50%的乙醇0.25 ml)灌肠复制出UC大鼠模型. 将72只大鼠随机分为正常组, 模型组, SASP(柳氮磺吡啶)组, KKL大、中、小剂量组; 观察结肠大体形态损伤、组织学变化, 测定各组大鼠外周血和肠系膜淋巴结CD_4+ CD_(25)~+ T细胞亚群百分率的变化. 结果与模型组相比, KKL各组、SASP组结肠大体形态损伤、组织学变化显著改善. 与正常组比较, 模型组大鼠外周血和肠系膜淋巴结CD_4+ CD_(25)~+ T细胞亚群降低非常显著(P<0.01). 而经KKL、SASP治疗3周后, 大鼠外周血和肠系膜淋巴结CD_4+ CD_(25)~+ T细胞亚群, 均有显著或非常显著性增高(P<0.01或P<0.05). 结论 KKL对大鼠UC有显著的治疗作用,提高模型大鼠外周血和肠系膜淋巴结CD_4+ CD_(25)~+ 调节性T细胞可能是其治疗机制之一.
Copper solvent extraction from alkaline cyanide solution with guanidine extractant LIX 7950

The use of the guanidine extractant LIX 7950 extracting copper and cyanide from alkaline cyanide solution was investigated. The extraction of copper and cyanide under different initial copper and extractant concentrations was examined and the stoichiometric extraction constant of Cu(CN)_3~(2-) with LIX 7950 was calculated. Both the distribution coefficient and the stoichiometric extraction constant of Cu(CN)_3~(2-) with LIX 7950 decrease when the temperature is varied from 25 ℃ to 45 ℃, indicating the extraction process is exothermic. The calculated enthalpy change of the reaction (ΔHΘ) is about -190 kJ/mol. The copper extraction isotherms under different molar ratios of cyanide to copper are established. The preferential extraction of Cu(CN)_3~(2-) over Cu(CN)_4~(3-) and CN~- has been confirmed and a high cyanide-to-copper molar ratio tends to suppress copper loading. The loaded copper and cyanide can be stripped efficiently by the moderately strong NaOH solutions (0.5-1.0 mol/L) and the presence of NaCN in the stripping solution facilitates copper stripping.
Comparative study of microstructure and corrosion resistance of electroless Ni-W-P coatings treated by laser and furnace-annealing

A comparative study of amorphous electroless Ni-W-P coatings on mild steel substrate treated by a high power diode laser and furnace annealing was presented. Effects of different laser operating parameters and furnace-annealing conditions on microstructures, in terms of crystallisation, pores formation and grain growth, were investigated using SEM/EDX and XRD. Corrosion behaviours of these coatings before and after various treatments were evaluated with anodic polarisation in 0.5 mol/L H_2SO_4 solution. The results show that the furnace-annealing produces either a mixture of nanocrystallined Ni and amorphous phases or precipitated Ni_3P phase distributed in nanocrystallined Ni-based matrix, depending on annealing temperatures, whilst the laser treatment under the operating conditions only produces nanocrystallined Ni-based matrix with Ni_3P precipitates. Corrosion performance of the coatings treated by both the laser and the furnace-annealing is dependent on the annealing temperature and laser operating conditions. Corrosion mechanisms of various treated-coatings were discussed in the consideration of phase constitutes and proportion, grain sizes of both Ni and Ni_3P phases, pores formation and residual stresses.
高陡边坡大口径塑料管道埋地施工方法介绍

向家坝水电站左岸生活污水处理厂污水收集干管采用dn600和dn800 HDPE管,其中一段399 m长dn800主干管的埋设位置地处陡峭边坡,施工条件恶劣. 介绍了人工整理便道、砌筑挡墙、挖填结合的施工方法,该法开挖工程量小,节约资金,保护了原有地貌,管线运行状况良好.
城市再生水回用技术在燃煤电厂中的应用

将城市污水处理厂二级出水经深度处理可回用于电厂循环冷却水补充水、锅炉补给水、其他工业用水等,常采用的技术包括混凝澄清、深层过滤、石灰处理、BAF、UF、RO、MBR等,给出了各种技术的典型工艺及工程实例,并指出了其选用的原则.
县镇下水道建设与城市排水系统的变革

剖析了目前全国大规模建设县镇污水处理厂的形势和存在的问题,指出大中型城市的排水系统体制应用到县镇污水处理的弊端,提出了适合县镇实际情况的循环型排水系统体制. 循环型县镇排水系统体制追求水资源、植物营养素的循环利用,为社会的可持续发展提供了基础保障.
高速线材与大盘卷工程水处理设备改进措施

分析了江西南昌某公司年生产能力80万t的高速线材及大盘卷工程水处理设备存在的不足. 对其防止净环冷却塔滤料流失、循环泵基础加固、板框压滤机防喷溅、过滤器安全运行等几个取得了良好效果的改进措施进行介绍.
边墙型扩展覆盖面喷头选用探讨

边墙型扩展覆盖面喷头应用很广,设计中选用边墙型扩展覆盖面喷头的最大难点在于如何根据喷头工作压力和产品样本来判定是否满足其湿墙性能. 介绍了当产品样本仅提供喷头布水曲线时,边墙型扩展覆盖面喷头选用的计算方法.
低功率密度超声波预处理对活性污泥微生物相的影响

采用低功率密度超声波对活性污泥进行预处理,观察了污泥混合液异养菌数、微型动物和微生物群落结构等的变化情况,并测定了反应过程污泥比耗氧速率(SOUR)及反应器上清液化学需氧量(SCOD)指标. 研究表明,污泥中不同种群微生物对超声辐射作用敏感性不同,超声波预处理对污泥SOUR提高与其后对污水的净化效果并不存在严格的对应性,因此,仅依靠SOUR指标来评价超声参数值得商榷. 超声辐射污泥的生物效应受多种因素影响,使不同研究获得的最佳超声参数不具普适性;同时,采用超声辐射提高污水生物反应器效率需要消耗大量能量,应该考虑该技术在工程中应用的可行性.
二氧化氯预氧化处理微污染黄河水的中试研究

采用ClO_2对微污染黄河水进行预氧化中试研究,结果显示ClO_2预氧化处理对黄河水中有机物(COD_(Mn)、UV_(254)、TOC)、藻类和亚硝酸盐氮有较好的去除效果;对水中氮的去除作用与氮在水中的存在形式有关;在试验的最佳投加量(1 mg/L)下,副产物的生成量满足国家标准;使用二氧化氯预氧化可以降低原水的需氯量;二氧化氯预氧化处理费用约为0.009元/m~3.