基于测量不确定度评定的数据处理方法

中利用直接测量量和间接测量量的测量不确定度评定方法,根据误差理论的教学经验与实践,给出了直接测量量和间接测量量的实验数据处理的具体方法步骤,并结合实际的测量数据,举例说明了如何运用直接测量量和间接测量量的实验数据处理方法,既便于学生理解又利于他们更好地掌握。     

Simultaneous strain and temperature measurement based on a photonic crystal fiber modal-interference interacting with a long period fiber grating

An alternative all-fiber sensor for simultaneous strain and temperature measurement based on a photonic crystal fiber (PCF) spliced between single-mode fibers cascaded with a long period grating (LPG) is proposed. By collapsing the air holes at two splicing regions along the PCF, a simple but effective modal-interference (MI) is occurred between the core and cladding modes of the PCF. Due to the different responses on the changes of strain and temperature on the MI and the cascaded LPG, the strain and temperature can be measured simultaneously. Experimental results show that the sensing resolution of 9.1 με in strain measurement is experimentally achieved over a range of 2640 με, while the temperature sensing resolution is 0.27 °C within a range of 30-100 °C.     

Online characterization of regulated and unregulated gaseous and particulate exhaust emissions from two-stroke mopeds: A chemometric approach

Two-stroke mopeds are a popular and convenient mean of transport in particular in the highly populated cities. These vehicles can emit potentially toxic gaseous and aerosol pollutants due to their engine technology. The legislative measurements of moped emissions are based on offline methods; however, the online characterization of gas and particulate phases offers great possibilities to understand aerosol formation mechanism and to adapt future emission standards. The purpose of this work was to study the emission behavior of two mopeds complying with different European emission standards (EURO-1 and EURO-2). A sophisticated set of online analyzers was applied to simultaneously monitor the gas phase and particulate phase of exhaust on a real time basis. The gaseous emission was analyzed with a high resolution Fourier transform infrared spectrometer (FTIR; nitrogen species) and a resonance-enhanced multiphoton ionization time-of-flight mass spectrometer (REMPI-ToF-MS; polycyclic aromatic hydrocarbons: PAH), whereas the particulate phase was chemically characterized by a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS; organic, nitrate and chloride aerosol) and a multiangle absorption photometer (MAAP; black carbon). The physical characterization of the aerosol was carried out with a condensation particle counter (CPC; particle number concentration) and a fast mobility particle sizer (FMPS; size distribution in real time). In order to extract underlying correlation between gas and solid emissions, principal component analysis was applied to the comprehensive online dataset. Multivariate analysis highlighted the considerable effect of the exhaust temperature on the particles and heavy PAH emissions. The results showed that the after-treatment used to comply with the latest EURO-2 emission standard may be responsible for the production of more potentially harmful particles compared to the EURO-1 moped emissions.     

Litcrosomal Nadph Oxidase and Hybrid Electrodes

Abstract

The NADPH oxidizing activity of rat liver microsomes was investigated and found to be mainly due to the cytochrome P-450 system. The XADPH oxidase was utilized for the development of several organelle electrodes. Gelatin membrane immobilized microsomes were combined with an O₂ membrane sensor for bioelectrochemical measurement of NADPH. The dependence of the current on substrate concentration was linear up to 1 mmol·1^?1 To assemble hybrid electrodes for determination of glucose-6-phoaphate, ATP and isocitrate pure enzymes were coimmobilized with the microsomal fraction.     

Remote Preparation of Multipartite Equatorial Entangled States in High Dimensions with Three Parties

A scheme for probabilistic remotely preparing N-particle d-dimensional equatorial entangled states via entangled swapping with three parties is presented. The quantum channel is composed of N - 1 pairs of bipartite d-dimensional non-maximally entangled states and a tripartite d-dimension non-maximally entangled state. It is shown that the sender can help either of the two receivers to remotely prepare the original state, and the N-particle projective measurement and the generalized Hadamard transformation are needed in this scheme. The total success probability and classical communication cost are calculated.     

Controlled Remote State Preparation

We present a scheme for remotely preparing a state via the controls of many agents in a network. In the scheme, the agents' controls are achieved by utilizing quantum key distribution. Generally, the original state can be restored by the receiver with probability 1/2 if all the agents collaborate. However, for certaintype of original states the restoration probability is unit.     

An Economical Scheme for Cloning an Unknown M-Qudit Equatorial-Like State with Assistance

We propose a scheme to realize quantum cloning of an unknown M-qudit equatorial-like entangled state. The first stage of the protocol requires teleportation. After the teleportation is accomplished, the receiver can reestablish the original state. In the second stage of the protocol, with the assistance （through a single-particle projective measurement） of the preparer, the perfect copy of an original state can be produced at the site of the sender. Our scheme requires a single maximally entangled qudit pair as the quantum channel and three dits classical communication. The scheme is feasible at the expense of consuming local resources which include M - 1 ancillary qudits introduced by the receiver and additional bi-qudit operations. Moreover, we construct a sort of unitary transformations which ensure ancillary qudits are not necessarily introduced by the sender. Comparing to the previous protocols, the proposed protocol is economical due to that the cost of both quantum nonlocal resources and classical communication is lowest.     

Dispersion Analysis of Birefringent Dielectric Grating Structure for Application in Pressure and Temperature Measurements

In this paper, the dispersion characteristics of a birefringence dielectric planar grating structure for application in pressure and temperature measurements are analyzed by a method, which combines the edge element method with rigorous mode matching approach. Analysis results show that this new anisotropic grating structure offers very high sensitivity for pressure and temperature measurements. Also it is justified that the present method has the advantages of simplicity, accuracy and suitability.     

自相关法测量激光超短脉冲时域分布的解相关

本文论述一种从典型的自相关法测量得到激光超短脉冲时域分布的有效方法,这种方法不必进行另外的光谱测试及假定脉冲形状。     

透明管径及管厚的CCD成像在线测量方法

应用光线透过透明管径的折射规律,提出线阵CCD成像在线测量透明管状外径及壁厚的新方法。该方法用计算机进行模拟导出了数理模型。实验证明了这一方法的可行性,为透明管状产品的批量生产、高速、动态、非接触实时在线测量提供了一条新的技术途径。