焦磷酸锶镁：锡荧光体的发光特性

本文用高温固相反庆法合成了（Ｓｒ１－ ｘ Ｍｘ ）２Ｐ２Ｏ７ ∶Ｓｎ （３．３×１０－ ２）和（Ｓｒ０．９Ｍｇ０．１）２Ｐ２Ｏ７∶ｘＳｎ 两个体系系列样品,在紫外线激发下,详细测定了它们的激发和发射光谱,讲座了Ｍｇ 含量对（Ｓｒ１－ ｘＭｇｘ）２Ｐ２Ｏ７∶Ｓｎ 和Ｓｎ 含量对（Ｓｒ０．９Ｍｇ０．１）２Ｐ２Ｏ７∶ｘＳｎ 体系发光性能的影响。     

新型NZP族磷酸盐陶瓷Ca1-xBaxZr4(PO4)6的合成及其性能研究

用共沉淀法合成了Ｃａ１－ｘＢａｘＺｒ４（ＰＯ４）６（０〈ｘ〈１）系列ＮＺＰ族陶瓷的粉体,添加３ｗｔ％的ＭｇＯ,在５０～１００ＭＰａ下干压成型,分别在１３００℃下无压烧结１～２ｈ,制成ＣＢＺＰ系列陶瓷材料。对这些材料分别进行太强度测试,用扫描电镜观察了显微结构,测定了室温１０００℃的平均线膨胀系数。其中ＣａＺｒ４（ＰＯ４）６（ｘ＝０）和ＢａＺｒ４（ＰＯ４）６（ｘ＝１）的抗压强度分别达１５７．４ＭＰａ     

H2O2—Fe^2＋氧化法处理对氨基酚工业废水的研究

结果表明,利用Ｈ２Ｏ２－Ｆｅ２＋ 氧化法处理对氨基酚（ＰＡＰ）工业废水是切实可行的。当ＰＡＰ质量浓度在１．６ｇ／Ｌ～２．０ｇ／Ｌ范围内,在Ｈ２Ｏ２／ＰＡＰ＝ ４．０（质量比）,ＦｅＳＯ４·７Ｈ２Ｏ质量浓度为１．０ｇ／Ｌ条件下,反应１ｈ 后,工业废水中对氨基酚的去除率达９８％ ～９９％ 。降低了废水的色度并提高了废水的可生化性,该方法对反应条件（如温度和ｐＨ值等）没有严格要求,便于工业应用。     

湿化学法制备CaZr_（1－x）In_xO_（3－α）及其烧结体的阻抗谱研究

以碳酸钙、氧氯化锆、氧化铟为原料，用ｐＨ＝８．５～９．５的草酸－氨水溶液作沉淀剂，并加入适量的表面活性剂，制得了成分准确、颗粒均匀、分散性好的ＣａＺｒ_（１－ｘ）Ｉｎ_ｘＯ_（３－α）的前驱物。该沉淀物经１０００℃，３ｈ煅烧即可生成ＣａＺｒ_（１－ｘ）Ｉｎ_ｘＯ_（３－α）相；此产物经１６００℃，８ｈ时烧结，得到相对密度大于９５％的致密烧结体。测量了烧结体在湿空气中的阻抗谱并提出了合理的等效电路，得到ＣａＺｒ_（１－ｘ）Ｉｎ_ｘＯ_（３－α）的本体电导率与温度和组成的关系。     

化学沉淀法除去废水中的氨及其机理的研究

了用化学沉淀除去废水中的氨，探讨了不同沉淀剂如Ｍｇ（ＯＨ）２＋Ｈ３ＰＯ４或ＭｇＨＰＯ４，不同初始Ｍｇ（ＯＨ）２：ｈ３ＰＯ４摩尔比，不同ＰＨ值及初始氨浓度对氨除去效率的影响。     

带有一个反凸约束的线性规划

带有一个反凸约束的线性规划，其可行域一般是非凸不连通集，因而这是一类困难的全局解问题。在回顾了已有的理论和方法之后，给出了这个问题的一个切割-转轴算法。算法收敛到或有限步内终止于问题的全局解。并且给出了执行算法的例子。     

异丁烯两段催化氧化制甲基丙烯酸催化剂的研究 Ⅱ．甲基丙烯醛气相氧化制甲基丙烯酸的杂多酸盐催化剂的研究

本文报道用于甲基丙烯醛（ＭＡＬ）选择氧化制甲基丙烯酸（ＭＡＡ）的ＰＭｏＶ杂多酸盐催化剂的研究结果。ＩＲ和ＸＲＤ考察结果表明，本文所研究的催化剂均具有稳定的Ｋｅｇｇｉｎ结构，催化剂物相组成为Ｈ（４－２ｙ－２）ＰＯ４（ＭｏＯ３）（１２－ｘ）（ＶＯ３）ｘＣＵｙＣｓｚ。在３００℃，原料气组成ＭＡＬ：Ｈ２Ｏ：Ｏ２：Ｎ２＝１：１０：３：３２．体积空速１２００ｈ（－１）的条件下，最佳催化剂的ＭＡＬ转化率为９４．１％，ＭＡＡ选择性达８８．７％。     

水中微量铝的直接测定──Al（Ⅲ）─CAS─CPB─TritonX─100混合胶束增溶分光光度法

在ＰＨ５．３～７．１的六次甲基四胺缓冲溶液中，Ａｌ（Ⅲ）—ＣＡＳ—ＣＰＢ—ＴｒｉｔｏｎＸ—１００络合物的最大吸收波长为６３０ｎｍ，ε＝１．１０ｘ１０￣５Ｌ．ｍｏｌ￣（－１）．ｃｍ￣（－１），摩尔组成比Ａｌ（Ⅲ）：ＣＡＳ：ＣＰＢ＝１：３：３，铝量在０．２～８μｇ／２５ｍｏｌ范围内符合比尔定律，回收率９９～１０４％。本法以盐酸羟胺和邻菲啉作联合掩蔽剂，常见金属离子干扰少，用本法测定自来水、废水中微量铝，结果令人满意。     

固定化细胞生产L－苹果酸新工艺及动力学研究

对产氨短杆菌ＭＡ－２固定化细胞在富马酸铵体系中转化生成Ｌ－苹果酸的优化工艺条件做了探讨，结果表明，富马酸铵浓度为１．８ｍｏｌ／Ｌ，ｐＨ７．０～８．０，反应温度为３７℃时，Ｌ－苹果酸得率达２００ｇ／Ｌ左右。同时，对固定化细胞的动力学进行了研究，结果为：ｒ（ｍａｘ）＝５８ｍｍｏｌ／（Ｌ·ｈ·ｇ固定化湿细胞）），Ｋｍ＝６．２５×１Ｏ￣（－２）ｍｏｌ／Ｌ，Ｐ＿ｍ＝１．５６ｍｏｌ／Ｌ     

具有给定陈不变量的一般型极小代数曲面的构作

证明了１个定理：若预先给定的正整数对（ｘ，ｙ）满足：ｘ≥３８４０８８，ｙ是偶数，且７３７８８ｘ≤ｙ≤９２５８０１０４２９ｘ－１９２８７７，则可以构造１个一般型的极小代数曲面Ⅹ，使Ⅹ具有预先给定的陈不变量Ｃ２１（Ｘ）＝ｙ，χ（Ｘ）＝ｘ，且Χ具有纤维化。     

一方圆玺 一朝国事

一方圆玺,不知见证了多少的历史风云!     

A SIMULATION OF A MOTIONLESS MIXER

Continuous laminar mixing in segmented twisted-tape motionless mixers is considered. A solution to the steady isothermal creeping flow of a Newtonian fluid in a twisted-tape mixer has been obtained via two-dimensional numerical procedures. The developed flow within a section of the mixer has been solved in a helical coordinate system by an iterative scheme. The resulting solution is rigorously correct in the absence of entrance and exit flows at the junction between sections. An algorithm is presented for the modelling of these junction flows via two-dimensional procedures. Simulated cross-sectional mixing patterns have been generated for comparison with experimental results

The performance of twisted-tape mixers is simulated for various designs, beginning with the particular geometry of the Kcnics Static Mixer, and for different operating conditions Results suggest that the rate of mixing as a function of the total twist per section is optimized with respect to pressure drop when sections contain 80 degrees of twist. The capability for rational improvement in other design and operating parameters is illustrated. The mechanisms of laminar mixing are discussed and quantified; of primary importance is the tendency for interfacial area to assume an orientation within each section which is favorable to mixing in subsequent sections.     

A MATHEMATICAL ANALYSIS OF A MEMBRANE BIOREACTOR CONTAINING A SLUDGE DISINTEGRATION SYSTEM

The activated sludge process is widely used to treat domestic and industrial wastewater. A significant drawback of this process is the production of “sludge”, the disposal of which can comprise a significant proportion of the total operating costs of a wastewater treatment plant. We analyze the steady-state operation of a membrane bioreactor system (MBR) incorporating a sludge disintegration unit (SDU) to reduce sludge production. We provide a qualitative understanding of the model by finding analytically the steady-state solutions of the model and determining its stability as a function of the residence time. In practice a target value of the mixed liquor suspended solids (MLSS) content within the membrane reactor is specified. Applying the mathematical technique of singularity theory we show that if the sludge disintegration factor is sufficiently high then the MLSS content is guaranteed to be below the target value. This model prediction, of key interest from a practical perspective, was not identified in the original investigation of this model, which relied upon numerical integration of the governing equations.     

千碉之国·丹巴

丹巴县是四川省甘孜州的东大门.被誉为"深藏在横断山脉中的世外桃源",是嘉绒藏族风情文化的中心,属岷山、邛崃山区,是川西高山峡谷的一部分.文化底蕴厚重,民俗风情浓郁,区内遍布的古碉是藏族先民的建筑艺术杰作,具有悠久灿烂的历史.     

一种新型传动结构的斜坡辊道

浮法玻璃厂联合车间受工艺限制,往往将2楼熔制成形车间和1楼包装车间用斜坡辊道连接起来。而2楼与斜坡之间衔接的凸弧辊道、1楼与斜坡之间衔接的凹弧辊道,其结构形式往往成为设计及安装调试的难点。传统的弧段结构采用锥齿轮箱和同步带传动结构,与当前主流的通轴弧齿锥齿轮结构相比较为落后。本文对浮法玻璃车间斜坡辊道结构进行详细阐述,并提出了一种新的凸、凹弧辊道的传动结构。     

一起制氮设备的故障分析

在浮法玻璃生产过程中,氮气流量保持恒定,是保持锡槽工况稳定的重要条件,是生产优质浮法玻璃的重要前提条件之一.只有制氮设备的稳定运行,才能保证氮气供应.本文就制氮空压机运行中出现的故障现象、原因进行了分析,并提出了改进措施.     

四川省某酒业集团废水处理工程

介绍了采用EGSB＋CASS工艺处理酿酒废水的工程实例，废水COD浓度在12000mg／L左右时，经本工艺处理后出水COD浓度小于100mg／L，达到国家排放标准，为类似废水的处理提供借鉴经验。     

A MATHEMATICAL MODEL FOR A YANKEE HOOD

Drying of thin paper sheet on a Yankee cylinder equipped with a steam heated high velocity hood is examined. When possible infiltration of air from the surroundings is considered, then the process is fully determined by twelve variables. One of these can be chosen as an independent variable. An equation group of eleven equations is derived. The method of solution is iterative. Finally, a numerical demonstration example is presented.