mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Observed precipitation trends in the Yangtze river catchment from 1951 to 2002

The monthly, seasonal, and annual precipitation trends in the Yangtze river catchment have been detected through analysis of 51 meteorological stations′ data between 1950-2002 provided by National Meteorological Administration. Results reveal that: 1) Summer precipitation in the Yangtze river catchment shows significant increasing tendency. The Poyanghu lake basin, Dongtinghu lake basin and Taihu lake basin in the middle and lower reaches are the places showing significant positive trends. Summer precipitation in the middle and lower reaches experienced an abrupt change in the year 1992; 2) The monthly precipitation in months just adjoining to summer shows decreasing tendency in the Yangtze river catchment. The upper and middle reaches in Jialingjiang river basin and Hanshui river basin are the places showing significant negative trends; 3) Extreme precipitation events show an increasing tendency in most places, especially in the middle and lower reaches of the Yangtze river catchment.
Analysis and assessment of land desertification in Xinjiang based on RS and GIS

The land desertification in Xinjiang was monitored and analyzed based on RS and GIStechniques. Satellite data interpretation was adopted to obtain the general situation of Xinjiang′s land desertification in assistance with the sampling method and on-the-spot investigations. Related monitoring and investigations showed that Xinjiang was facing with severe wide range land desertification, and its desertified area made up 77.08% of the total monitoring area. As for land types,the desertified farmland accounted for 1.92% of the total monitoring area, desertified woodland 4%,desertified grassland 45%, and unused land 49%. Accordingly, as for desertification degrees,non-desertified land occupied 22.92%, weak desertified land 5.69%, medium-degree desertified land 16.58%, severe desertified land 33.19% and super severe desertified land 21.61%. Finally, as for inducing factors, wind-eroded desertification made up 58.23%, water-eroded desertification 8.69%,salinization desertification 6.52% and frozen-melt eroded desertification 3.64%. Xinjiang′s land desertification tended to get worse and the harnessing mission remained hard.
Estimating Heat Fluxes by Merging Profile Formulae and the Energy Budget with a Variational Technique

A variational technique (VT) is applied to estimate surface sensible and latent heat fluxes based on observations of air temperature, wind speed, and humidity, respectively, at three heights (1 m, 4 m, and 10m), and the surface energy and radiation budgets by the surface energy and radiation system (SERBS). The method fully uses all information provided by the measurements of air temperature, wind, and humidity profiles, the surface energy budget, and the similarity profile formulae as well. Data collected at Feixi experiment station installed by the China Heavy Rain Experiment and Study (HeRES) Program are used to test the method. Results show that the proposed technique can overcome the well-known unstablility problem that occurs when the Bowen method becomes singular; in comparison with the profile method, it reduces both the sensitivities of latent heat fluxes to observational errors in humidity and those of sensible heat fluxes to observational errors in temperature, while the estimated heat fluxes approximately satisfy the surface energy budget. Therefore, the variational technique is more reliable and stable than the two conventional methods in estimating surface sensible and latent heat fluxes.
A quantitative analysis on the sources of dune sand in the Hulun Buir Sandy Land: application of stepwise discriminant analysis (SDA) to the granulometric data

Quantitatively determining the sources of dune sand is one of the problems necessarily and urgently to be solved in aeolian landforms and desertification research. Based on the granulometric data of sand materials from the Hulun Buir Sandy Land, the paper employs the stepwise discriminant analysis technique (SDA) for two groups to select the principal factors determining the differences between surface loose sediments. The extent of similarity between two statistical populations can be described quantitatively by three factors such as the number of principal variables, Mahalanobis distance D2 and confidence level α for F-test. Results reveal that: 1) Aeolian dune sand in the region mainly derives from Hailar Formation (Q3), while fluvial sand and palaeosol also supply partially source sand for dunes; and 2) in the vicinity of Cuogang Town and west of the broad valley of the lower reaches of Hailar River, fluvial sand can naturally become principal supplier for dune sand.
苦参碱含量测定中色谱条件的改进

苦参为豆科植物苦参的干燥根,具有清热燥湿,杀虫、利尿的功效,为临床常用中药.苦参碱为苦参的主要有效成分,<中国药典>2000年版一部收载了苦参碱的含量测定方法,该方法在应用的过程中发现斑点拖尾比较严重,背景较深,稳定性较差,且测定时间长.为解决上述问题,我们对苦参碱含量测定中的色谱条件进行了研究,对色谱条件进行了改进.
Variational Data Assimilation Experiments of Mei-Yu Front Rainstorms in China

The numerical forecasts of mei-yu front rainstorms in China has been an important issue. The intensity and pattern of the frontal rainfall are greatly influenced by the initial fields of the numerical model. The 4-dimensional variational data assimilation technology (4DVAR) can effectively assimilate all kinds of observed data, including rainfall data at the observed stations, so that the initial fields and the precipitation forecast can both be greatly improved. The non-hydrostatic meso-scale model (MM5) and its adjoint model are used to study the development of the mei-yu front rainstorm from 1200 UTC 25June to 0600 UTC 26 June 1999. By numerical simulation experiments and assimilation experiments, the T106 data and the observed 6-hour rainfall data are assimilated. The influences of many factors, such as the choice of the assimilated variables and the weighting coefficient, on the precipitation forecast results are studied. The numerical results show that 4DVAR is valuable and important to mei-yu front rainfall prediction.
The Structure and Bifurcation of Atmospheric Motions

The 3-D spiral structure resulting from the balance between the pressure gradient force, Coriolis force, and viscous force is a common atmospheric motion pattern. If the nonlinear advective terms are considered, this typical pattern can be bifurcated. It is shown that the surface low pressure with convergent cyclonic vorticity and surface high pressure with divergent anticyclonic vorticity are all stable under certain conditions. The anomalous structure with convergent anticyclonic vorticity is always unstable. But the anomalous weak high pressure structure with convergent cyclonic vorticity can exist, and this denotes the cyclone's dying out.
Treatment of LBCs in 2D Simulation of Convection over Hills

A series of idealized model simulations are analyzed to determine the sensitivity of model results to different configurations of the lateral boundary conditions (LBCs) in simulating mesoscale shallow convection over hilly terrain. In the simulations with steady thermal forcing at the model surface, a radiation condition at both boundaries is the best choice under high wind conditions, and the best results are produced when both the normal velocities and the temperature are treated with the radiation scheme in which the phase speed is the same for different variables. When the background wind speed is reasonably small, the LBC configuration with either the radiation or the zero gradient condition at both boundaries tends to make the numerical solution unstable. The choice of a constant condition at the inflow boundary and a radiation outflow boundary condition is appropriate in most cases. In the simulations with diurnal thermal forcing at the model surface, different LBC schemes are combined together to reduce spurious signals induced by the outflow boundary. A specification inflow boundary condition, in which the velocity fields at the inflow boundary are provided using the time-dependent results of a simulation with periodic LBCs over a flat domain, is tested and the results indicate that the specification condition at the inflow boundary makes it possible to use a smaller model domain to obtain reasonable results. The model horizontal domain length should be greater than a critical length, which depends on the domain depth H and the angle between gravity wave phase lines and the vertical. An estimate of minimum domain length is given by [(H - zi)/πU]√N2L2x - 4π2U2 , where N and U are the background stability and wind speed,respectively, Lx is the typical gravity wavelength scale, and zi is the convective boundary layer (CBL) depth.
Assessment and spatial distribution of sensitivity of soil erosion in Tibet

Based on Universal Soil Loss Equation and methods of mathematics model and GIS analysis, this study classified influence of precipitation, soil, topography and vegetation upon sensitivity of soil erosion into five different degrees which are extreme sensitivity, quite sensitivity,sensitivity, less sensitivity and no sensitivity. Assessment map of each factor was generated separately. Integrated assessment map of sensitivity of soil erosion has also been drawn by overlapping function with Arcinfo. Furthermore, the study analyzed distribution characteristics and spatial difference of sensitivity of soil erosion under special plateau environment of Tibet. According to sensitivity degree, some important controlling regions was confirmed so that departments of water conservancy, traffic management and agriculture could make scientific and reasonable decisions for their respective subject planning.
Galerkin alternating-direction methods for nonrectangular regions for the transient behavior of a semiconductor device

For the transient behavior of a semiconductor device, the modified method of characteristics with alternating-direction finite element procedures for nonrectangular region is put forward. Some techniques, such as calculus of variations, isoparametric transformation, patch approximation, operator-splitting, characteristic method, symmetrical reflection, energy method, negative norm estimate and a prior estimates and techniques, are employed. In the nonrectangular region case, optimal order estimates in L2 norm are derived for the error in the approximation solution. Thus the well-known theoretical problem has been thoroughly and completely solved.
原子吸收光谱法间接测定生活饮用水中硫酸盐

硫酸盐在自然界中广泛存在,一般地下水及地面水均含有硫酸盐.硫酸盐是生活饮用水水质常规检验项目之一.《生活饮用水卫生规范》中测试方法有硫酸钡灼烧称量法、铬酸钡比色法、硫酸钡比浊法及离子色谱法,且操作繁杂,条件控制要求严格.本文以火焰原子吸收光谱法测定中间钡离子而间接测定水中硫酸盐,具有操作简单、准确度好、精密度高,能满足生活饮用水中硫酸盐的测定要求.……
Effects of Seasonality on Streamflow and Water quality fo the Pinang River in Penang Island, Malaysia

For the Pinang River, originating in the western highlands of Penang Island, the nature, sources and extent of pollution were studied. The river water samples collected at five selected sites were analyzed for various physical and chemical parameters, namely temperature, DO, BOD, COD, SS, pH, ammoniac nitrogen (AN), and conductance. Long-term data of rainfall and temperature were analyzed to determine the seasonal variations of the streamflow.The streamflow during the dry season is extremely Iow compared to the wet season, thus concentrations of contaminants derived from point pollution source increase due to lack of rainfall and runoff events. On the contrary, in the predominantly urban and agricultural catchments, non-point pollution source increases during rainy season through seepage and runoff. Effects of seasonal variations consequently determine the quantity and quality of the water parameters.The Jelutong River, the Dondang River and the Air Itam River carry the seepage from widely urban and residential arcas to the main Pinang River systems. Water quality of the Pinang River at different points assessed by the water quality indices was compared. According to the quality indices during the study period, water quality in the upper reaches of the river is medium to good. It dwindled in the plains, due to the seepage from urban areas and discharges from the industrial and agricultural lands.
Ecological Security Evaluation of Sustainable Agricultural Development in Karst Mountainous Area-A

Ecological security is the main task and applied field of present geography, resources and environment sciences and ecology. Ecological security evaluation will efficiently promote ecological security and environmental construction in regional land use. In this thesis, the authors put forward the index system of ecological security evaluation in karst mountainous area on three aspects, the pressure of resources and eco-environment, the quality of resources and eco-environment, and the ability of environmental protection and ecological improvement. Using the evaluation method with single index, based on the case study ofDu'an Yao Autonomous County of Guangxi Zhuang Autonomous Region, the system of synthetic regionalization of ecological agricultural economy was formed, which includes three regions, south region with basic security and synthetic agricultural development, east region with critical security and agriculture, forestry, animal husbandry balanced development, mid-west and south region with ecological insecurity and compounded agriculture and forestry management. Meanwhile, for these regions, the countermeasures of sustainable agricultural development were pointed out, which provide the basis and example for ecological regulation and control of sustainable agricultural development in counties ofkarst mountainous area.
Evidence of Dual Scale Porous Mechanisms During Fluid Migration in Hardwood Species (Ⅱ) A Dual Scale Computational Model to Describe the Experimental Results

The second part of this paper is devoted to the computational modelling of transient water migration in hardwood. During re-saturation, the moisture content, measured during the process by using X-ray attenuation (see part 1 of this paper), increases quickly very close to the cavity, but requires a very long time for the remaining part of the sample to absorb the moisture in wetting. For this configuration and this material, the macroscopic approach fails. Consequently, a dual-porosity approach is proposed. The computational domain uses a 2-D axisymmetric configuration for which the axial coordinate represents the macroscopic longitudinal direction of the sample whereas the radial coordinate allows the slow migration from each active vessel towards the fibre zone to be considered. The latter is a microscopic space variable. The moisture content field evolution depicts clearly the dual scale mechanisms:a very fast longitudinal migration in the vessel followed by a slow migration from the vessel towards the fibre zone.The macroscopic moisture content field resulting from this dual scale mechanism is in quite good agreement with the experimental data.
淡竹叶多糖的超声提取及含量测定

淡竹叶为禾本科植物淡竹叶Lophatherum gracile Brongn.的干燥茎叶.具有清热除烦,利尿之功效.现代药理学研究、淡竹叶具有解热利尿、抗菌、抗肿瘤、升高血糖等作用[1].本实验采用超声提取法提取淡竹叶多糖,苯酚-浓硫酸比色法对淡竹叶多糖含量进行测定.……
金果含片含量测定方法的改进

金果含片由地黄、玄参、西青果、陈皮等药材制成,有养阴生津,清热利咽的功能,适用于急慢性咽炎(喉痹).收载于部标WS3-234(Z-043)-99(Z)含量测定项下,橙皮苷对照品及供试品的制备均采用流动相[甲醇-水(40:60)]溶解和提取.……
银杏叶片合并百忧解治疗脑卒中后抑郁状态临床观察

脑卒中后抑郁为脑卒中后常见并发病,约占50%～60%.①早期发现抑郁或其他精神障碍,早期治疗,可以促进卒中的康复.对银杏叶提取物的研究发现,可以提高抗抑郁剂的疗效.临床我们采用银杏叶片合并百忧解治疗47例脑卒中后抑郁病人,取得很好效果,报告如下.……
Effect of vasoactive intestinal peptide on pulmonary surfactants phospholipid synthesis in lung explants

AIM: To investigate the effect of vasoactive intestinal peptide (VIP) on pulmonary surfactants (PS) phospholipid synthesis in cultured lung explants. METHODS: Lung explants were cultured with serum-free medium, [methyl-3H]choline incorporation, total phospholipid, phosphatidylcholine, activity of choline-phosphate cytidylyltransferase (CCT) and CCTa mRNA level in lung explants were determined. RESULTS: (1) VIP (10-10-10-7 mol/L) for 16 h promoted [methyl-3H]choline incorporation in dose dependence and VIP (10-8 mol/L) for 2 h-16 h promoted [methyl-3H]choline incorporation in time dependence. (2) VIP (10-8 mol/L) enhanced the contents of total phospholipids and phosphatidylcholine in lung explants. (3) VIP (10-10-10-7 mol/L) elevated microsomal CCT activity of lung explants in dose dependence. (4) VIP (10-8 mol/L) increased expression of CCTa mRNA in lung explants and alveolar type II cells (ATII). (5) [D-P-Cl-Phe(6)-Leu(17)]-VIP (10-6 mol/L), a VIP receptors antagonist, abolished the increase of [3H]choline incorporation, microsomal CCT activity and CCTa mRNA level induced by VIP (10-8 mol/L) in lung explants. CONCLUSION: VIP could enhance synthesis of phosphatidylcholine, the major component of pulmonary surfactants by enhancing microsomal CCT activity and CCTa mRNA level via VIP receptor-mediated pathway.
HPLC测定痔疮灵酊中盐酸小檗碱的含量

痔疮灵酊是由黄柏、苦参等6味中药材提取精制而成的医院制剂,有活血化瘀,抗菌消炎的功效.用于内外痔疮、肛裂等.为了更有效地控制制剂的质量,探讨其主要成份的含量测定方法,我们建立了盐酸小檗碱的HPLC含量测定法.方法准确、简便、可靠.……
香青兰降血脂化学成分实验研究

唇形科植物香青兰[1](Dracocephalum moldavica L.),维吾尔名为巴迪然吉布亚,分布于我国东北、西北、华北等地区,特别是在新疆,资源丰富.处方被收载于维吾尔古典医籍<阿里卡农>,至今已有800多年的历史.它在维吾尔医和民间广泛用于治疗冠心病及血液质旺盛(高血压)、寒性神经性头疼、寒性感冒、气管炎等疾病.维吾尔医学理论认为,冠心病是血液质旺盛并粘液质混合于血液质,异常血液质混合的异常粘液质沉滞在血管壁上引起的瘀血而造成的.……
图示法优化有机松香型助焊剂薄层色谱展开剂

近年来,国内外已有多篇文献报道了薄层色谱展开剂的优选方法[1～6],这些方法大都需要大量的试验和复杂的数学处理.本文介绍一种较为简单的优化展开剂方法,以代替以往的尝试法来分离进口的松香型助焊剂,本法具有试验次数少、数学处理简单等优点。
企业建设先进制造业基地是高速发展的必由之路

建设先进制造业基地、走新型工业化道路,是浙江省委省政府按照中央十六大战略决策,结合浙江实际作出的战略部署.先进制造业基地是以高新技术为先导,高附加值产品为主体,传统优势产业为基础,是若干行业产业规模大、技术创新能力强、国际化程度高、核心企业带动作用强、管理先进的产业集群区.因此,加快先进制造业基地建设有着深远的战略意义和重大的现实意义.……
国电永福发电有限公司管理信息系统的开发

目前,计算机技术正逐步进入电力系统的各个领域,电子信息化技术的发展和应用水平已成为衡量国家、行业、部门、企业实力的重要标志.尤其是对国民经济发展的"先行行业"--电力工业企业提高其管理水平、工作效率及树立企业形象起着越来越重要的作用.……
Effect of Diluents on the Extraction of Oxalic Acid by Trialkylphosphine Oxide

In liquid-liquid solvent extraction processes, diluents have a strong influence on the extraction mechanism and efficiency. In this study, benzene, cyclohexane, trichloromethane, carbon tetrachloride, methyl isobutyl ketone (MIBK), butyl acetate, and 1-octanol were used as diluents in the extraction of oxalic acid by trialkylphosphine oxide (TRPO). The effects of extractant concentration, initial concentration of oxalic acid and diluent type on the extraction equilibrium partition coefficient are analyzed. The sequence of the extraction ability by different diluents is MIBK ＞ butyl acetate ＞ cyclohexane=benzene ＞ carbon tetrachloride ＞ 1-octanol ＞ trichloromethane.Extraction mechanism was analyzed and extraction model parameters were evaluated.
Preliminary Study on the Performance and Interaction of Recycling Hydrolytic-Aerobic Combined Process of High Concentration Starch Wastewater

A new recycling hydrolytic-aerobic combined process was developed to treat the high concentration used. At first, the hydrolytic degradation and aerobic degradation process were examined in two batch reactors,respectively. In the stand-alone hydrolytic process, starch in the wastewater almost disappeared after 11 h treatment,but CODCr remained as high as 5803mg. L-1 after two days. In the aerobic process, the biodegradation rate of starch was much slower during the first 11 h than that in the hydrolytic process, although the CODCr removal efficiency reached 89.6% and more than 90% starch could be degraded after 37.5 h. To determine the interaction effects of the two processes, a series of hydrolytic-aerobic combinations were examined in details. Hydrolytic process played an important role in the whole recycle combination process as it could improve the biodegradability of the high concentration starch wastewater. However, from the other experiments, the negative effect of hydrolytic acidification was found in the hydrolytic-aerobic combination, which suggested that the aerobic microorganisms needed time to adapt themselves to the acidic environment. The effect of the degrading time, which was spent in the hydrolytic and aerobic unit, and the number of circulations, with which the wastewater went through the two units were investigated. It was found that a recycle combination of 6 h hydrolytic process with 12 h aerobic process was highly effective and potentially economical, in which the final removal efficiency of CODCr and efficiency of starch degradation reached 94.1% and 98.8%, respectively.
抑焦剂中间体亚磷酸三酰哌啶的合成工艺研究

磷酸三酰哌啶在工业生产中的应用越来越广泛,过去二十年中,在开发各种形式的含磷化合物的防污垢剂、抗氧剂、润滑剂、抗磨添加剂、表面活性剂等方面各国均做了较为广泛的研究工作.尤其是近年来,该化合物在石油炼制工业作为抑焦剂的应用也日趋广泛[1][4][5].……
金属材料分析方法的选择和施行第四讲金属材料中钛的测定(续)

③显色及光度测定将分取的两份试液分别置于100m1容量瓶中,各加硫酸(1+1)25.0ml,加水至约65ml,加入50g·L-1硫酸铜溶液2滴,20g·L-1抗坏血酸溶液(用时现配)2.0ml,摇匀,加入50g·L-1 DAPM溶液(1mol·L-1盐酸)10.0ml,加水至标线,摇匀.放置30min,用1cm或3cm的吸收皿,以试剂空白作参比,在400nm波长处测得其吸光度.
崂山自然保护区资源保护与管理的对策

1 崂山自然保护区概况 位于山东半岛南部黄海之滨的崂山自然保护区,是我国著名的国家级风景名胜区,保护区内生物物种丰富多彩,生物多样性复杂,是山东及至我国遗传多样性的一个巨大宝库.……
RP-HPLC测定复方南板蓝根片咖啡酸的含量

复方南板蓝根片原方载于<卫生部药品标准>中药成方制剂第五册(1992年)107页,由南板蓝根、蒲公英和紫花地丁组成的片剂,具有消炎解毒的功效,临床上主治腮腺炎、咽炎、乳腺炎、疮疖肿痛等[1].原质量标准只有性状,南板蓝根的TLC鉴别、试管反应和通则检查项,没有含量测定指标.为加强质量控制,对方中蒲公英中所含有效成分咖啡酸进行了含量测定。
大青膏的制备与临床应用

大青膏是我院的一个传统制剂,到目前临床应用已有40多年的历史.对治疗流行性腮腺炎及其他感染引起的痈、肿、热、痛均有较好的疗效.我们选择了小儿流行性腮腺炎100例进行治疗观察,取得了显著效果.
广西瑶族藤茶中双氢杨梅树皮素的含量测定方法研究

目的:建立广西瑶族藤茶中有效成分双氢杨梅树皮素(dihydromyricetin)的RP-HPLC定量分析方法.方法:采用Shimpack CLC (150mm×4.6mm,5μm),流动相为甲醇-0.05%磷酸(55∶45),流速1.0mL*min-1,检测波长292nm.结果:双氢杨梅树皮素在0.816～4.08μg范围内线性良好,r=0.999 9,平均回收率为98.8%,RSD<2.3%(n=9).结论:本法快速,简便,重复性好,可作为藤茶的质量控制方法。dObjective:To establish a quantification of dihydromyricetin in ampelopsis grosseden-tata by RP-HPLC. Methods: Chromatographic conditions included Shimpack CLC ODS column (150 mmX4.6mm,5fjtm) and a mixture of methanol-0. 05% phosphoric acid (55 :45) as a mobile phase with the flow rate at 1. OmL* min"1. Dihydromyricetin was detected at 292nm. Results; The linearity of dihydromyricetin was shown in the range of 0. 816—4. 08jitg (r = 0.999 9). The average recovery rate was 98.8% with RSD<2.3% (n =9). Conclusion:The simple and reliable method is applied to the quality control of dihydromyricetin.
面瘫咀嚼剂结合针刺治疗面瘫的临床观察

面瘫咀嚼剂是在吸收前贤验案效方的基础上,结合多年的临床经验,在中医理法方药原则指导下,筛选参合组方、制备而成的一种治疗周围性面瘫的新型中药制剂.两年来经对79例周围性面瘫患者针、药并用与单纯用药对比观察治疗表明,针、药并用组疗效明显优于单纯用药组.兹将临床观察总结如下。
基于XML的工厂多智能体系统研究

Agent技术由于本质的分散性和开放性受到制造业越来越多的关注.XML作为下一代Web语言,在企业数据集成方面展示了巨大的优势.本文介绍的多智能体系统包括代表生产任务的PA,代表制造资源的RA和实现工厂管理任务的PMA,这些Agent相互通讯、协作,完成生产任务.每个制造资源的性能均以XML的格式在中心数据库中注册,其他Agent能通过查询数据库了解现场的最新动态,找到需要的资源.PA具有以XML文件表示的所有生产信息.任何具有Agent接口和以XML形式表示其性能的制造资源均可在制造网络中即插即用,任何以XML形式表示的生产任务均可通过PA和RA的合作得以完成.
祛斑止痒膏质量标准研究

祛斑止痒膏为经皮给药制剂,主药由淫羊藿、蛇床子、虎杖、苦参、血竭等中药组成,具有清热祛风、燥湿杀虫之功效.临床主要用于治疗妇科外阴营养不良,外阴瘙痒等症.淫羊藿为方中君药,现代药理研究证明,淫羊藿总黄酮有促进蛋白质合成、调节细胞代谢、降低血液黏度、改变血液流变性及增强机体免疫等作用,淫羊藿苷为其代表性成分,建立淫羊藿苷的含量测定方法,对于控制药品质量应具有可行性.文献表明淫羊藿苷含量测定方法较多,有二阶导数光谱法[10]、柱层析-一阶导数光谱法[4]、薄层层析-库仑滴定法[3]、薄层层析-紫外分光光度法法[2]、薄层扫描法[5,6]、高效液相色谱法[1]等.为了有效控制制剂质量,本试验采用HPLC法对其进行了含量测定,并采用TLC法对方中蛇床子、虎杖、苦参等药材进行定性鉴别,为祛斑止痒膏质量控制提供科学依据。
抗肿瘤药物白花蛇舌草及其活性成分

白花蛇舌草(以下简称本品)Hedyotis diffusa Willd是一年生披散草本,属茜草科(Rubiaceae)耳草植物.本品见于<广西中药志>一书,别名蛇舌草,蛇刺草,羊须草等.广泛分布于亚热带地区,在我国主要分布于广东、广西、福建等地。
纳米胶体硅简介及应用

纳米胶体硅简介纳米胶体硅(简称纳米硅)是一种含有一定浓度的纳米级无定形二氧化硅的水溶胶分散体系,一般呈透明、半透明或微乳液体,分子化学式可表示为mSiO2·nH2O.由于纳米硅是无机二氧化硅的水溶胶,故其为一种无毒、无臭的环保性产品.
地球:我们美丽的家园--纪念4·22世界地球日

人类已经进入21世纪,随着世界文化多元化、经济一体化的发展,科学技术的进步,宇宙空间的开拓……人类社会发展的走向和速度比以往任何时候都超乎人们的想象.然而,面对"人类的摇篮"--地球,目前,公认的全球问题是:地球气候变暖、水体污染、植被破坏、物种消失、资源枯竭、人口剧增、恐怖活动猖獗,核威胁等,这一切,如果任其发展,得不到有效遏制,其最终结局必然是人类走向自我毁灭.
社区共管:自然保护区资源管理模式的新突破--以太白山大湾村为例

社区共管作为国际上一种崭新的后发展地区资源管理模式,是20世纪80年代末期由国际活体水资源管理中心 (International Center for Living Aquatic Resources Management, ICLARM)和国际渔业管理组织(Institute of Fisheries Management,IFM)发起,广泛应用于渔业、海岸资源、森林和国家公园的日常管理,在东南亚、非洲、墨西哥等地取得了显著成效.近年来,该模式也逐渐引入我国,但对于如何结合当地实际开展社区共管,国内尚缺乏经验.
把握机遇迎接挑战把我国可持续发展战略推向一个新台阶

自我国确立可持续发展战略以来,可持续发展战略实施取得了积极的进展,为全人类的可持续发展做出了积极的贡献.当前,国内外形势正在发生深刻的变化,我国可持续发展战略的实施也迎来了一个崭新的时代.我们应该充分把握机会,利用一切有利条件和机遇,更深入地推动可持续发展战略的实施。
支持企业联盟产品协同设计的项目管理系统研究

企业间的项目管理系统是进行网络化制造的基础,本文着重讨论企业间的产品设计类项目管理,通过对WBS项目分解方法的改进,提出一种能满足产品设计类项目进行项目/设计任务/设计活动分解的方法,并采用基于Agent工作流技术对产品设计过程进行协调控制,开发了企业间设计类项目管理原型系统.
New Optical Solitons in High-Order Dispersive Cubic-Quintic Nonlinear Schrodinger Equation

By using the generalized tanh-function method, we find bright and dark solitary wave solutions to an extended nonlinear Schrodinger equation with the third-order and fourth-order dispersion and the cubic-quintic nonlinear terms, describing the propagation of extremely short pulses. At the same time, we also obtained other types of exact solutions.