A nearly completely articulated rhamphorhynchoid pterosaur with exceptionally well-preserved wing membranes and “hairs” from Inner Mongolia, northeast China

We report a new and nearly completely articulated rhamphorhynchoid pterosaur, Jeholopterus ningchengensis gen. et sp. nov., with excellently preserved fibres in the wing membrane and "hairs" in the neck, body and tail regions. Many of its characteristics such as a short neck, short metacarpals and distinctively long fifth pedal digit are characteristic of rhamphorhynchoids. The new species can be further referred to the 'strange' short-tailed rhamphorhynchoid family Anurognathidae. It is much more complete than the other known members of the family, namely, Anurognathus from Solnhofen, Germany, Batrachognathus from Karatau, Kazakhstan, and Dendrorhynchoides from Beipiao, Liaoning Province, China. The new pterosaur also shows that the wing membrane is attached to the ankle of the hind limb. The pedal digits are webbed. Furthermore, the "hair" of Jeholopterus bears some resemblance to the hair-like integumental structures of the feathered dinosaur Sinosauropteryx although there is yet no direct evidence to argue for or against their homology.     

α—乙酰吡啶缩氨基硫脲镍配合物及其抑菌活性研究

合成了α－乙酰吡啶缩氨基硫脲（ＨＬ）与镍（Ⅱ）形成的５个配合物，并通过元素分析；摩尔电导、磁矩的测定和紫外光谱、红外光谱的研究，对其进行了表征。抑菌活性实验表明：［ＮｉＬ（ＮＣＳ）］对枯草杆菌、金黄色葡萄球菌和大肠杆菌具有较强的抑制作用。     

Further support for a Cretaceous age for the feathered-dinosaur beds of Liaoning,China:New 40Ar÷39Ar dating of the Yixian and Tuchengzi Formations

We report new ⁴⁰Ar÷³⁹Ar dating results obtained from total fusion and incremental-heating analyses of sanidine and biotite from three tuffs found interbedded within the fossil-bearing deposits of Liaoning, northeast China. The first is a new sample of the Bed 6 Sihetun tuff from the Yixian Formation, previously dated by our team as middle Early Cretaceous, and recently considered by Lo et al., partially reset due to metamorphism from a nearby basaltic sill. The second is the Yixian Bed 9 tuff from Hengdaozi considered by Lo et al. to be unaffected by metamorphism and whose age, based on total fusion ⁴⁰Ar÷³⁹Ar dating of biotite, argues for a Jurassic age for the Yixian Formation. The third tuff is a previously undated tuff from the upper part of the underlying Tuchengzi Formation. Single crystal total fusion ⁴⁰Ar÷³⁹Ar analyses of the Sihetun sanidine showed homogeneous radiogenic Ar, Ca÷K ratios, excellent reproducibility and gave a mean age of 125.0±0.18 (1SD)±0.04 (SE) Ma. Single sanidine crystal total fusion ⁴⁰Ar÷³⁹Ar analyses of the Hengdaozi tuff gave a mean age of 125.0±0.19 (1SD)±0.04 (SE) Ma, which is indistinguishable from the Sihetun tuff. The Tuchengzi Formation tuff gave a mean age of 139.4±0.19 (1SD)±0.05 (SE) Ma. Detailed laser incremental-heating analyses of biotite from Sihetun, Hengdaozi, and Tuchengzi tuffs show disturbed Ar release patterns and evidence of trapped argon components. We conclude from these analyses that the total fusion dates on biotite by Lo et al. are erroneously old and isotopic dating of both biotite and sanidine from tuffs of the Yixian Formation point to a middle Early Cretaceous age. The upper part of the Tuchengzi Formation can be referred to the Early Cretaceous.     

化学镀Ni-Cu-P工艺及镀层性能研究

研究了化学镀Ni－Cu－P工艺及镀层性能。当温度控制在70～75℃、pH值控制在7．0～8．0、添加剂B的含量为2．0g／1、CuSO4含量1～2g／1时,所得镀层性能最好。镀层经热处理后,组织和性能将发生变化。发现Ni－Cu－P镀层出现最高硬度的热处理温度为500℃,超过Ni－P化学镀层出现最高硬度的热处理温度。经过正确的热处理后,镀层硬度和耐磨性优于Ni－P化学镀层,且应用温度范围较宽。     

强功率压电超声聚能器研究

介绍梭棒式压电换能器结构及用该换能器串连合成的聚能实验。该系统频率为19.2kHz,电功率容量在2700W以下时,其电声效率可达到0.99。     

YCo5和Y2Co17金属间化合物的溶解度范围测定

用Ｘ射线衍射点阵常数测定，电子探针定量分析，金相组织观察３种方法确定了ＹＣｏ５和Ｙ２Ｃｏ１７两化合物１０００℃和１２００℃的溶解度范围，３种方法所得结果一致。     

平板式膜分离免疫球蛋白的研究

该实验研究了用超滤分离和提取免疫球蛋白（ＩｇＹ）的可行性，探讨了平板式膜分离操作参数对通量及免疫球蛋白活性的影响。     

电动机自启动技术在炼油化工生产中的应用

随着炼油化工装置的不断扩容及误操作的频发,运行中的电动机经常因为电网电压瞬间波动而意外停机,严重影响了化工生产装置的连续运行。通过应用电动机自启动技术,可以使电动机在电网电压波动后实现自启动后迅速恢复运行,从而保持生产装置的连续运行,实现了企业效益的最大化。     

精馏装置使用热泵与采取热集成的节能研究

精馏装置中采用热泵或采取热集成都是有效的节能措施,本文以有效能损失最小为目标函数,结合芳烃分离对两种方式的节能效益作了比较.     

一类状态时滞系统的最优预见控制器设计

研究了一类状态时滞系统的最优预见控制器设计问题. 首先通过差分将所研究的时滞系统转化为形式上不含时滞的一般系统,然后根据已有的无时滞系统的预见控制理论设计出系统的控制器,并且给出了所设计的控制器存在的充分条件.仿真实验说明了预见前馈补偿的有效性.