离子浮选法从钨酸盐溶液中分离钨钼

利用作者试验室合成的捕收剂采用离子浮选法进行了钨钼分离．对于（ＮＨ４）２ＷＯ４溶液和Ｎａ２ＷＯ４溶液体系，每克钼捕收剂用量为６７６ｇ的条件下，对于含钼量为０４～１２ｇ／Ｌ的料液，其除钼率可达到９４％～９９％．     

特种金属表面催化液制备方法

具有铁变“不锈钢”外观的特种金属表面催化技术，不需电源及复杂设备，只要将金属件在事先配制好的特种催化液中浸泡３０～５０ｍｉｎ，就可在金属件表面形成具有综合防护性能的光亮镀层。这是目前替代有毒电镀，解决金属表面防护及装饰处理业环境污染的一条重要途径。无论生产催化剂外销．还是用催化液加工金属镀件，都有丰厚的经济效益，且不需专业设备投资，操作简便，原料易购。一、原料配方及工艺条件ＮｉＳＯ４·６Ｈ２Ｏ２３ｇ／ＬＮａＨ２ＰＯ２·Ｈ２Ｏ３５ｇ／ＬＮａ３Ｃ６Ｈ５Ｏ７·２Ｈ２Ｏ３５ｇ／ＬＰＡ复合络合剂１５ｇ／Ｌ…     

果胶溶液粘度的研究

本文研究了浓度、温度、酸度、Ｃａ２＋、糖等因素对果胶溶液粘度的影响，在酸度为０．９ｇＨＣｌ／１０Ｏｍｌ下来胶容液的粘度最低、而Ｃａ２＋，糖在研究的范围内对果胶溶液粘度的影响不大。     

离子交换法处理钨矿物原料苏打压煮母液的研究

对离子交换法处理钨矿物原料苏打压煮的母液进行了全面研究，系统测定了不同树脂对ＷＯ及ＣＯ的吸附性能及两者的分离系数，查明了从上述溶液中吸附ＷＯ的最佳条件。在流速为２ｃｍ／ｍｉｎ的条件下，对含ＷＯ３２７．０４ｇ／Ｌ，ＣＯ１２．２３ｇ／Ｌ，Ｃｌ￣－２ｇ／Ｌ及少量Ｐ，Ａｓ，Ｓｉ杂质的模拟工业料液而言，强碱性阴离子交换树脂Ｄ２１３吸附ＷＯ的交换容量达２２７．９ｍｇＷＯ３／ｇ干树脂．最终解吸液成分符合制取高纯ＡＰＴ的要求，含ＣＯ的交后液可部分返回苏打压煮过程以回收Ｎａ２ＣＯ３。     

极谱吸附波连续测定水样中痕量锌,锰和硒

在酒石酸－乙二胺－高氨酸－亚硫酸钠－高碘酸钟体系中痕量锌锰和硒出现良好极谱吸附波，波峰敏锐，可测定浓度范围在０．４０～４０μｇ／Ｌ　Ｚｎ￣（２＋）１．６～８０μｇ／ＬＭｎ￣（２＋）及０．０２～２．３μｇ／ＬＳｅ（Ⅳ）。对含１１．７μｇ／Ｌ　Ｚｎ￣（２＋），７．０μｇ／Ｌ　Ｍｎ，１．４５μｇ／Ｌ　Ｓｅ（Ⅳ）的矿泉水样测定，其相对标准偏差分别是６．２％和９．２％和７．３％。     

鸡堫菌菌丝体液体培养的研究

适合鸡菌菌丝体液体培养的培养基成分是：淀粉１０ｇ，蔗糖２ｇ，蛋白胨２ｇ，ＫＨ＿２ＰＯ＿４０．３ｇ，ＭｇＳＯ＿４·７Ｈ＿２Ｏ０．１５ｇ；最佳Ｃ／Ｎ为３０～４０：１；最适培养温度２６℃；ｐＨ６．４；振荡频率１４０～１４５ｒ／ｍｉｎ，继代培养周期８天．液体培养的鸡菌菌丝体氨基酸总量可达２７３ｍｇ／ｇ干重，其中４２．４１％为人体必需的氨基酸（未含色氨酸）．     

气相色谱法测定强力生发灵甲液中的人参皂苷

用气相色谱法测定了强力生发灵甲液中的人参皂苷Ｒ_ｅ与Ｒ_（ｇ１），给出了样品预处理和样品分析的最佳条件。以信噪比为２作标准，直接测得Ｒ_ｅ，Ｒ_（ｇ１）的最小检测限分别为８．９×１０~（－１２）和５．４×１０~（－１２）ｇ·ｓ~（－１）；回收率分别为９２％～１０６％和７０％～７７％。     

灵芝深层培养工艺的研究

为了提高发酵终了时灵芝菌丝浓度以获取高等真菌多糖，对灵芝ＡＳ．５．６５的深层培养工艺进行了研究。确定了最适发酵条件为：５％玉米淀粉、０．３％玉米浆、１％豆饼粉、０．６％糖蜜、０．１５％ＫＨ２ＰＯ４、０．０７５％ＭｇＳＯ４·７Ｈ２Ｏ，ｐＨ５．５～６．０，温度２８℃，摇床转速１５０ｒ／ｍｉｎ，摇瓶种子培养３ｄ接种。接种量５％、装液量５０ｍＬ，培养５～６ｄ可终止发酵。最终菌体干重可达２７．５ｇ／Ｌ、含粗多糖２．６ｇ／Ｌ。     

喂丝法钢液脱铜

提出了用喂丝法向钢液中插和盐或氨基化合物的脱铜方法，在常压下，Ａｒ气氛中，向钢液中分别加入ＮＨ４Ｃｌｔ ＮＨ２ＣＯＮＨ２，把约３００ｇ钢水含铜量从０．６％降至０．４７－０．５％，仅用脱铜剂２－４ｇ，氯化铵有氯化和铵分解的双重脱铜作用，比尿素脱铜效果更好。     

黄酒中微量铜,锌的电位溶出法测定

在ＮＨ３－ＮＨ４Ｃｌ（ｐＨ９．２及ｐＨ５．６）底液中，采用玻碳电极镀汞膜作工作电极，经阴极电解富集后，铜（Ⅱ）在－０．４８Ｖ（ｖｓ．ＳＣＥ），锌（Ⅱ）在－１．０８Ｖ左右呈现良好的氧化溶出峰．峰高对浓度的线性范围：铜为０．１～２．５μｇ／２０ｍＬ，锌为０．２～４．６μｇ／２０ｍＬ．用该方法直接测定了黄酒中的微量铜和锌．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the