基于近红外的奶粉品质检测技术研究

奶粉种类繁多且检测的理化指标较多,为了进一步简化近红外光谱检测技术在奶粉生产过程中的应用步骤,文章首次提出了建立包含不同种类奶粉样品集的6个指标：酸度、脂肪、乳糖、蔗糖、蛋白和灰分的近红外模型,用于奶粉质量控制。该文采用全谱分析结合模型优化方法研究,分别建立了该混合奶粉样品集的6个指标的近红外模型。实验表明：除酸度外,该研究所建立混合奶粉的其他理化指标的近红外定标模型具有较好的稳定性和预测能力(RSD<10%,RPD>3)。因此该方法的提出可以简化近红外技术在奶粉定量分析中的步骤。     

WCDMA通信系统用高温超导滤波器的设计

用于WCDMA移动通信系统接收频段的高温超导滤波器,滤波器的电路芯片采用蒸镀于2英寸0.5mmMgO基片上的双面DyBa2Cu3O7高温超导薄膜,设计制作的滤波器工作中心频率为1930MHz,相对带宽为1.04%,最终滤波器的工作温度为72K,实际测试结果满足了设计的要求。     

煤热解与甲烷蒸汽重整耦合过程焦油在碳基镍催化剂上的原位催化提质（英文）

本研究采用Ni/KD-9催化剂，对CP-SRM过程焦油进行原位催化提质研究。结果表明，在650℃热解温度下，CPSRM在5Ni/KD-9催化作用下的焦油产率为24.4%，略低于不进行催化提质的焦油产率，而轻质焦油产率（18.9%）是未提质时的1.4倍。相比未提质焦油，用5Ni/KD-9提质后焦油中的C₂、C₃和C₄烷基取代苯含量分别增加0.5、0.6和4.0倍；酚和萘的含量也明显提高。采用同位素示踪方法结合典型组分质谱图，探究了催化提质过程的反应机理。结果表明，5Ni/KD-9可以同时催化焦油裂解和甲烷蒸汽重整（SRM）,SRM过程产生的小分子自由基，如·CH_x，·H和·OH可以与焦油裂解产生的自由基结合，从而避免焦油的过度裂解。     

Network correlation between investor’s herding behavior and overconfidence behavior

It is generally accepted that herding behavior and overconfidence behavior are unrelated or even mutually exclusive.However,these behaviors can both lead to some similar market anomalies,such as excessive trading volume and volatility in the stock market.Due to the limitation of traditional time series analysis,we try to study whether there exists network relevance between the investor’s herding behavior and overconfidence behavior based on the complex network method.Since the investor’s herding behavior is based on market trends and overconfidence behavior is based on past performance,we convert the time series data of market trends into a market network and the time series data of the investor’s past judgments into an investor network.Then,we update these networks as new information arrives at the market and show the weighted in-degrees of the nodes in the market network and the investor network can represent the herding degree and the confidence degree of the investor,respectively.Using stock transaction data of Microsoft,US S&P 500 stock index,and China Hushen 300 stock index,we update the two networks and find that there exists a high similarity of network topological properties and a significant correlation of node parameter sequences between the market network and the investor network.Finally,we theoretically derive and conclude that the investor’s herding degree and confidence degree are highly related to each other when there is a clear market trend.     

一些厂商实行特殊定价时的均衡存在性

在这篇文章里,我们将重新考察基于Dierker等人的混合生产经济的均衡存在性问题,提出一个由非凸技术生产厂商制定的更符合实际的定价规则.此外,我们在增加一个标准条件下证得均衡存在,而不仅是自由处置均衡的存在性.     

Topological phase diagrams and Majorana zero modes of the Kitaev ladder and tube

In this paper,we study two quasi-one-dimensional(1 D) Kitaev models with ladder-like and tube-like spatial structures,respectively.Our results provide the phase diagrams and explicit expressions of the Majorana zero modes.The topological phase diagrams are obtained by decomposing the topological invariants and the topological conditions for topologically nontrivial phases are given precisely.For systems which belongs to topological class BDI,we obtain the regions in the phase diagrams where the topological numbers show even-odd effect.For the Kitaev tube model a phase factor induced by the magnetic flux in the axial direction of the tube is introduced to alter the classification of the tube Hamiltonian from class BDI to D.The Kitaev tube of class D is characterized by the Z_2 index when the number of chains is odd while 0,1,2 when the number of chains is even.The phase diagrams show periodic behaviors with respect to the magnetic flux.The bulk-boundary correspondence is demonstrated by the observations that the topological conditions for the bulk topological invariant to take nontrivial values are precisely those for the existence of the Majorana zero modes.