时效性对单桩极限承载力的影响分析

目前，盐城地区正广泛采用打入式预制桩和泥浆护壁成孔灌注桩。从这两种桩的成桩工艺，结合地基条件，对盐城地区饱和软粘土层中这两种桩成桩后休止时间对单桩极限承载力的影响规律进行了分析研究，并对载荷试验的间歇时间的确定问题作一些有益的探讨。     

多维自回归滑动平均模型研究与应用

利用时序分析方法研究1952－1997年国内生产第一产业与第二产业产值的ARMAV模型，并用所建模型对1998年产值进行外延预测，得到较理想的预测结果。     

The ecological sequence of Hipparion fauna in the mid-dle reaches of the Yellow River during Neogene

The faunal ecological type and sequence in the Tertiary red clay indicate that Hipparion fauna during the period 7.4-6.1 Ma in the middle reaches of the Yellow River is composed mainly of dorcadoides and mixed types. This represents semiarid veld environment with small fluctuation. The fossil assemblages characterized by the abundance of gaudryi types and even the occurrence of some Hominoid and Chalicotherium indicate an obviously warm and humid period since 5.3 Ma. The fossil assemblages during 3.4 Ma show the typical steppe fauna representing dry climate. It is indicated by the changes of ecological sequence that the climatic conditions in Pliocene are drier than that in late Miocene. The clay-skin content of red clay, which has a synchronous change with faunal features, is a rather good replacing palaeoclimatic index.     

The ecological sequence of Hipparion fauna in the middle reaches of the Yellow River during Neogene

The faunal ecological type and sequence in the Tertiary red clay indicate that Hipparion fauna during the period 7.4–6.1 Ma in the middle reaches of the Yellow River is composed mainly of dorcadoides and mixed types. This represents semiarid veld environment with small fluctuation. The fossil assemblages characterized by the abundance of gaudryi types and even the occurrence of some Hominoid and Chalicotherium indicate an obviously warm and humi period since 5.3 Ma. The fossil assemblages during 3.4 Ma show the typical steppe fauna representing dry climate. It is indicated by the changes of ecological sequence that the climatic conditions in Pliocene are drier than that in late Miocene. The clay-skin content of red clay, which has a synchronous change with faunal features, is a rather good replacing palaeoclimatic index.     

尼龙6/粘土纳米复合材料的熔融挤出制备及表征

为了研究尼龙6／粘土纳米复合材料制备和结构，采用合适的改性剂对粘土进行有机改性，改性后的有有机土与尼龙按一定比例在具有反螺旋段的双螺杆挤出机中熔融复合。TEM测试结果表明：大多数粘土以单层层均匀分解于基体中（即使有少数以多晶层出现，厚度大约20nm），形成纳米复合材料。     

反褶积与信噪比的关系研究

在地震资料数字处理中 ,分辨率与信噪比是一对相互制约的矛盾 ,为了在反褶积处理过程中控制信噪比 ,从理论上分析了反褶积后剖面信噪比降低的原因 .以不同相位子波为例 ,从时间域出发 ,利用最小平方反滤波原理计算出反褶积算子 ,并验证了反褶积后剖面信噪比的降低是受反子波能量的影响 .为了兼顾分辨率和信噪比 ,进而分析讨论了反褶积中的白噪化问题 ,提出可以用加入白噪的方法来控制信噪比 ,但白噪不易加入过大 ,否则 ,由于加入白噪后求出的反子波不再是原来子波的逆 ,从而又将影响剖面分辨率的提高     

木质素降解菌L1原生质体的形成和再生

从自然界筛选出一株降解木质素高的白腐真菌 L1,对其原生质体的形成和再生进行了研究。在 OS培养基中生长的菌丝体 ,原生质体数量较高。在液体培养条件下 ,于 OS培养基中培养 60 h的菌丝体 ,用 0 .3% β-巯基乙醇与酶液同时处理菌丝体 ,采用 p H5 .0的混合酶 (蜗牛酶∶纤维素酶∶溶菌酶的最佳浓度比为 5∶ 4∶ 1 ) ;在 30℃酶解 4h;用 0 .4mol/L NH4Cl,1 0 mmol/L Mg SO4作渗透压稳定剂时 ,原生质体数量达到 4.32× 1 0 5个 /mg。 OS双层再生培养基最适于原生质体再生     

某机场强夯工程试验研究

结合国内某机场地基强夯处理工程，试验研究了强夯处理饱和粉土、粉质粘土地基，并通过静力解探、标贯和载荷板等原位测试对不同施工参数下的强夯夯后地基进行了评价。最后综合试验结果，确定了处理本机场地基的单击夯能、布点方式和夯间间隔等强夯施工参数。     

电视摄象机的光谱特性和矩阵电路

本文首先阐明三管摄象机的理想谱曲线的负叶(瓣)是正确重现基色三角形内的色所必要的,而后在理论上证明矩阵电路能使理想曲线的负叶完全实现。因此我们不再停留于基色信号相加和相减而近似得出这些负叶的说法。     

聚季铵型阳离子聚合物在蒙脱土上的吸附最大值现象

用静态吸附的实验方法对三种聚季铵型阳离子聚合物(COP)在蒙脱土上的吸附现象进行了研究,实验结果表明,COP在蒙脱土上的吸附等温线不符合Langmuir规律,而存在吸附最大值现象,用红外光谱法和岩芯流动试验方法也得到相同的结果。