水泥厂磨矿过程模拟

对磨矿过程进行模拟,是提高磨矿效率、降低磨矿能耗的基础研究。针对水泥厂的磨矿环节,进行了生产过程采样和实验室实验,以此为基础对磨矿过程进行了模拟研究。从一般的磨矿方程出发,经过对水泥厂的磨矿过程进行抽象,推导出适合于工业磨矿过程的数学模型。利用该模型对磨矿过程进行数学模拟,所得模拟产品的粒度分布曲线与实际产品的基本相似,这表明用适当的模型来模拟工业磨矿过程是可行的。     

Long-day photoperiod induced unhealthy development of chloroplasts in the photoperiod-sensitive genie male-sterile rice

By measurement of photochemical activities of chloroplasts and observation on supramolecular archi tecture of thylakoids in chloroplasts, it was found that compared with the effects of short-day photoperiod, long-day pho toperiod could induce normal development of chloroplasts in seedlings of NK58S (photoperiod-sensitive genie male-sterile rice) and NK58 (original line) which do not enter the photoperiod sensitive phase and in seedlings of NK58 just enter the photoperiod-sensitive phase. However, it could induce unhealthy development of chloroplasts in seedlings of NK58S which also just enter the photoperiod sensitive phase. This special effect of long-day photoperiod on the development of chloroplasts in NK58S is probably one of main reasons why long-day photoperiod induces rale-sterility in NK58S and normal fertility in NK58.     

枫蓼肠胃康颗粒对非特异性和脾虚型溃疡性结肠炎的作用研究

为观察枫蓼肠胃康颗粒对非特异性和脾虚型溃疡性结肠炎豚鼠的血中E -玫瑰花环形成率 (Ea -RFC)、总E -玫瑰花环形成率 (Eτ -RFC)、溃疡个数、溃疡面积和水肿面积变化的影响 ,将杂毛豚鼠分成 6组 ,每组 10只 ,用二硝基氯苯Ⅰ、Ⅱ、Ⅲ液注入肠管法和番泻叶灌肠法 ,分别建立豚鼠慢性非特异性结肠炎和脾虚型溃疡性结肠炎动物模型 ,在 0、2 1d取血测定血中Ea -RFC及Eτ -RFC含量 ,脾虚动物于给药 7d处死 ,计出各组动物溃疡个数、溃疡面积和水肿面积 .结果表明 :各剂量给药组中的Ea -RFC、Eτ -RFC免疫指标较造模组升高 (P分别<0 .0 1和 <0 .0 5 ) ,受试药高、中剂量组溃疡个数、溃疡面积、水肿面积较造模组降低 (P分别 <0 .0 1和 <0 .0 5 ) .提示 :枫蓼肠胃康颗粒对豚鼠非特异性结肠炎和脾虚型溃疡性结肠炎有显著疗效 .     

TCM/IDR信道单元帧同步的实现

基于格型编码调制/中等数据速率（TCM/IDR）卫星通信信道单元帧结构的特点和预置启动法,研究具有分散插入且呈复杂周期性的帧定位信号搜捕方法,并利用现有的现场可编程门阵列（FPGA）芯片和双端口随机静态存储器（SRAM）实现了相应的帧同步器,实现表明设计方案和实现电路是正确的。     

一维介观链中的多电荷孤子研究

采用半经典模型对一维介观结链中存在多个剩余电子时的电势分布进行了研究, 并发现在一维介观链中存在多电荷孤子.多电荷孤子的特征是它的电势峰劈裂为多个峰, 每个剩余电子存在的岛都对应着 1 个峰. 同时也发现单电荷孤子等效的方法在处理多电荷孤子时同样实用.     

Simulation for the primary electronic donor of photosystem Ⅱ in vitro

Histidine coordinated to Chl a is a distinct characteristic of Chl a in vivo. By using histidine analogue of 1-methylimidazole (C4H6N2) and measuring the UV/vis absorption, CD and MCD spectra of the interaction between C4H6N2 and Chl a in CCl4, we have obtained that: (ⅰ) In pure CCl4 solvent, Chl a molecule is in five-coordinate state, and two Chl a molecules form an asymmetric compact-dimer with strong coupling interaction. We propose that the two Chl a molecules are connected by two unequally coordinated Mg-O bonds (the two oxygen atoms come from the C== O of C131 keto and C17 ester, respectively); (ⅱ) when the molar ratio of C4H6N2/Chl a is 0.5 or 1 (corresponding to 2Chl a·1C4H6N2 and 2Chl a·2C4H6N2, respectively), significant changes have been observed in the absorption, CD and MCD spectra, which indicate that the Chl a remains in dimer form, but the coupling interaction between them reduces greatly. We postulate that C4H6N2 replaces the ligation of C== O of C17 ester and C131 keto to Mg atoms sequentially. The two Chl a molecules linked by two weakly interacted Mg...O bonds form a relaxed-dimer. The structure of the model is essentially similar to that of the primary electronic donor, P680, of photosystem Ⅱ in high plants and algae.     

The excitation energy transfer between b -Car and Chla molecules in PSⅡ core antenna complexes CP43 and CP47

The excitation energy transfer efficiency between b -Car and Chla molecules in purified CP43 and CP47 was calculated by comparing absorption and fluorescence excitation after normalization at 550 nm, CP43 had an energy transfer efficiency of 29.1% while the CP47 had an energy transfer efficiency of 62.8%, proving that excitation energy was transferred between b -Car and Chla molecules in CP43 and CP47 at normal conditions. The excitation energy transfer between b -Car and Chla molecules in CP43 and CP47 may occur through the "Dexter" mechanism and the distance between these two kinds of pigments should be less than 1 nm. In addition, the results were also used to discuss the conformational relationship between b -Car and Chla molecules in CP43 and CP47.     

天山北侧前陆盆地异常高压成因研究

天山北侧前陆盆地即准噶尔盆地 ,该盆地南缘存在严重的超高压异常现象。异常高压的成因主要为“沉积型”和“构造型”两种造压机制 ,其形成演化分为拉张沉积期静水压力阶段、沉积造压及压力封存箱形成阶段和压力封存箱挤压增压阶段。利用有限元模拟法计算研究区主应力值 ,建立主应力值与异常压力系数的匹配关系 ,预测准噶尔南缘紫泥泉子组异常压力平面分布特征。     

Sol-gel法制备羟基磷酸钙超细粉末

用Sol gel法以磷酸和氢氧化钙为原料制备了羟基磷酸钙 (HAP)超细粉末 .重点研究了体系pH值、磷酸的滴加方式和滴加速度对产物组成和性质的影响 .结果表明 :通过控制磷酸的滴加方式和滴加速度 ,在体系pH为 1 1～1 2条件下可制得纯HAP超细粉末     

小城镇建设发展分析与面临问题的对策思考

分析了过去小城镇发展的动力、新形势下面临的问题,并提出了新形势下小城镇发展的对策.