Heat Transfer Method for Solid Flow Rate Measurement in Gas-Solid Two Phase Flow

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A Method and Equipment for Measurement of the Complex Transfer Factor of a Radome Wall

In this paper, it is offered to use the method of modulated reflection for the measurementof complex transfer factor of a radome wall on various sites of its surface. The circuit of equipmentallowed to carry out of such measurement is given. The advantage of the given method in comparisonwith measurements on a gleam is shown. The results of the experimental research are given and theestimation of the accuracy of proposed method is considered.

Bidirectional transfer of quantum information for unknown photons via cross-Kerr nonlinearity and photon-number-resolving measurement

We propose an arbitrary controlled-unitary （CU） gate and a bidirectional transfer scheme of quantum information （BTQI） for unknown photons. The proposed CU gate utilizes quantum non-demolition photon-number-resolving measure- ment based on the weak cross-Kerr nonlinearities （XKNLs） and two quantum bus beams; the proposed CU gate consists of consecutive operations of a controlled-path gate and a gathering-path gate. It is almost deterministic and is feasible with current technology when a strong amplitude of the coherent state and weak XKNLs are employed. Compared with the existing optical multi-qubit or controlled gates, which utilize XKNLs and homodyne detectors, the proposed CU gate can increase experimental realization feasibility and enhance robustness against decoherence. According to the CU gate, we present a BTQI scheme in which the two unknown states of photons between two parties （Alice and Bob） are mutually swapped by transferring only a single photon. Consequently, by using the proposed CU gate, it is possible to experimentally implement the BTQI scheme with a certain probability of success.

A Numerical Method on Inverse Determination of Heat Transfer Coefficient Based on Thermographic Temperature Measurement

处于一个多维的热传导问题的热转移系数基于 thermographic 温度测量从反的热传导问题的答案被获得。与有限体积方法一起，修改一个维的修正方法(MODCM ) 为两 twoand 被采用三维的反的问题。一系列数字实验被进行以便验证方法的有效性。另外，温度测量错误的效果，重复的结束标准，反的问题的结果上的等等被调查。方法是能成功地解决反的热传导问题的简单、稳定、精确的，这被证明。

Multiple Scattering Between Adjacent Sound Sources in Head-Related Transfer Function Measurement System

To accelerate head-related transfer functions(HRTFs)measurement,two or more independent sound sources are usually employed in the measurement system.However,the multiple scattering between adjacent sound sources may influence the accuracy of measurement.On the other hand,the directivity of sound source could induce measurement error.Therefore,a model consisting of two spherical sound sources with approximate omni-directivity and a rigid-spherical head is proposed to evaluate the errors in HRTF measurement caused by multiple scattering between sources.An example of analysis using multipole re-expansion indicates that the error of ipsilateral HRTFs are within the bound of±1.0 dB below a frequency of 20 kHz,provided that the sound source radius does not exceed 0.025 m,the source distance relative to head center is not less than 0.5 m,and the angular interval between two adjacent sources is not less than 20 degrees.Similar conclusions under different conditions can also be analyzed and discussed by using this calculation method.Furthermore,the results are verified by measurements of HRTFs for a rigid sphere and a KEMAR artificial head.

Heat transfer enhancement in MOSFET mounted on different FR4 substrates by thermal transient measurement

Miniaturization of electronic package leads to high heat density and heat accumulation in electronics device, resulting in short life time and premature failure of the device. Junction temperature and thermal resistance are the critical parameters that determine the thermal management and reliability in electronics cooling. Metal oxide field effect transistor（MOSFET）is an important semiconductor device for light emitting diode-integrated circuit（LED IC） driver application, and thermal management in MOSFET is a major challenge. In this study, investigations on thermal performance of MOSFET are performed for evaluating the junction temperature and thermal resistance. Suitable modifications in FR4 substrates are proposed by introducing thermal vias and copper layer coating to improve the thermal performance of MOSFET. Experiments are conducted using thermal transient tester（T3ster） at 2.0 A input current and ambient temperature varying from25℃ to 75℃. The thermal parameters are measured for three proposed designs： FR4 with circular thermal vias, FR4 with single strip of copper layer and embedded vias, and FR4 with I-shaped copper layer, and compared with that of plain FR4 substrate. From the experimental results, FR4I-shaped shows promising results by 33.71% reduction in junction temperature and 54.19% reduction in thermal resistance. For elevated temperature, the relative increases in junction temperature and thermal resistance are lower for FR4I-shaped than those for other substrates considered. The introduction of thermal vias and copper layer plays a significant role in thermal performance.

Manipulations Between Eigenstates of 2-Level Quantum System Based on Optimal Measurements

This paper explores the manipulation between eigenstates in a two-level system by a sequence of instantaneous projective measurements. Three cases of the manipulations are studied: the manipulation of optimal measurement-based control;the optimal measurement-based manipulation with the effect of free evolution of system; and the external control fields being used to compensate for the effect caused by the free evolution. Numerical simulations are conducted to verify the results obtained from the theoretically analytical solutions. The optimal parameters for each manipulation case are obtained. The experimental results indicate that the external control fields can make the optimal measurement-based control more effective.

A novel launch dynamics measurement system for multiple launch rocket system and comparative analysis with numerical simulations

In this paper,a novel launch dynamics measurement system based on the photoelectric sensor pair is built.The actual muzzle time(i.e.a time duration that originates from the initial movement to the rocket’s departure from the muzzle)and the muzzle velocity are measured.Compared with the classical methods,the actual muzzle time is obtained by eliminating the ignition delay.The comparative analysis method is proposed with numerical simulations established by the transfer matrix method for multibody systems.The experiment results indicate that the proposed measurement system can effectively measure the actual muzzle time and reduce the error of classical methods,which match well with the simulation results showing the launch dynamics model is reliable and helpful for further analysis and design of the MLRS.

ELECTROCHEMICAL MEASUREMENT OF FLOW PARAMETERS IN DILUTE SOLUTION

A new theoretical method is proposed in the electrochemical measurement to obtain therelationship between flow parameter and the electrode current under the existence of ion migration ef-fect.In this way the measurement of local mass transfer coefficient,wall shear stress and liquid veloc-ity are presented and the experiment results are also described.

MEASUREMENT AND COMPUTATION OF THE PSEUDO-RESONANCE AND ANTI-RESONANCE

This paper presents a phenomenon of“Pseudo-resonance”of beams androds discovered from experiments and computations,and gives the definition of“Pseudo-resonance”.The relationship of distribution between the frequency of pseu-do-resonance and that of anti-resonance is found,and an analytic solution for thetransfer function between any two points on a beam or rod is established.The law ofdistribution of the anti-resonant frequencies,as well as the relation between the fre-quency distribution and the nodes of vibration is also proposed.

Use of photoelectron laser phase determination method for attosecond measurements with quantum-mechanical calculations

This paper calculates quantum-mechanically the photoelectron energy spectra excited by attosecond x-rays in the presence of a few-cycle laser. A photoelectron laser phase determination method is used for precise measurements of the pulse natural properties of x-ray intensity and the instantaneous frequency profiles. As a direct procedure without any previous pulse profile assumptions and time-resolved measurements as well as data fitting analysis, this method can be used to improve the time resolutions of attosecond timing and measurements with metrological precision. The measurement range is half of a laser optical cycle.

Research on inter-satellite measurement technique in high dynamic environment

An improved measurement algorithm, based upon the theory of two-way time transfer （ TWTT）, is proposed to measure satellites with high speeds. The algorithm makes theoretical analyses and corresponding deductions on a relative motion model of two satellites, and eliminates the measurement error caused by the equipment delay when a satellite moves at a high speed. Theoretical analysis and simulation results demonstrate that in comparison with the conventional TWTT algorithm, the proposed algorithm can significantly enhance the measurement accuracy of the inter-satellite ranging and time synchronization, and the algorithm is more effective with the relative velocity between the satellites and transmitting delay becoming larger.

Analysis on the Influencing Factors and Control Measures of "Non-Grain Conversion" of Cultivated Land in Agricultural Land Transfer

Through the method of literature analysis,this paper analyzes the present situation of the"non-grain conversion"of cultivated land in the transfer of agricultural land in China,summarizes the influencing factors and consequences of the phenomenon of"non-grain conversion"of cultivated land in the transfer of agricultural land,and finally puts forward some measures.The study found that costs and benefits are the fundamental factors affecting the"non-grain conversion"of cultivated land in agricultural land transfer,and other main factors include government and policy guidance,industrial and commercial capital to the countryside,labor transfer and so on.The"non-grain conversion"of cultivated land in the transfer of agricultural land is a serious threat to China s food security,leading to the decline of the quality of agricultural land and the destruction of the ecological environment,as well as the risk of breach of contract in"industrial and commercial capital to the countryside".Based on the understanding of the influencing factors of non-grain conversion,this paper puts forward the following measures:strengthening the control of the use of cultivated land in agricultural land transfer;implementing accurate subsidies for grain cultivation and ensuring the benefit of grain growers;adopting grain planting incentive mechanism to increase grain enthusiasm;strengthening media publicity and education to enhance food security awareness.The improvement of the current situation of the"non-grain conversion"of cultivated land in the transfer of agricultural land will be of great significance to the protection of agricultural land and food security in China.

Mass Measurement of ^(122)Cd and the New Levels of ^(120,122)Cd

The mass excess of the neutron-rich nucleus 122Cd is measured by transfer reactions122Sn(18O,20Ne)120Cd and 124Sn(18O,20Ne)122Cd.Its value is derived to be -80.73±0.04 MeV.In addition,a few new levels of 120.122Cd are observed.

Stationary Measures of Three-State Quantum Walks with Defect on the One-Dimension Lattice

In this paper, we focus on the space-inhomogeneous three-state on the one-dimension lattice, a one-phase model and a two-phase model include. By using the transfer matrices method by Endo et al., we calculate the stationary measure for initial state concrete eigenvalue. Finally we found the transfer matrices method is more effective for the three-state quantum walks than the method obtained by Kawai et al.

基于“12345”热线转办的投诉分析及措施探讨

目的归纳总结“12345”热线转办投诉的情况,分析原因,提出处理措施。方法选取2020年1月—2022年12月“12345”热线转办的启东市中医院投诉763件进行分析,分析投诉类型,总结发生投诉的科室分布情况,同时总结引起投诉的相关原因,提出处理措施。结果763件投诉情况中,涉及院感防控方面的总计380件,占比49.80%,其他涉及医院诊疗服务、就医流程、医疗收费等情况。涉及投诉的科室包括门诊医技科室、病区、总务、药房、收费等。分析结果显示,院感防控是3年内引起投诉的主要原因;其次是医患沟通不到位、医疗质量问题、服务态度问题、收费不合理等。结合原因提出相应处理对策。结论通过“12345”热线能够一定程度使医院了解投诉信息,拓宽投诉通道,改进服务机制,提升服务质量,以建立和谐、融洽的医患关系。

基于多维分析的对非外宣中医保健文本语际转换策略研究

中医保健文化是中医文化的重要组成部分。近年来,随着非洲各国人们对健康保健的日渐重视以及“文化走出去”战略的推进,对非中医保健外宣策略研究显得尤为重要。然而,针对非洲读者的中医外宣翻译研究乏善可陈,聚焦语言微观层面的研究更少。基于此,结合具体实例,应用多维文本分析法对高分译本的语体风格和语言特征进行了分析,总结出增译法、减译法和转译法等三种典型语际转换策略,以丰富相关研究。

基于Modbus协议的湿度检定系统设计

为了提高湿度计量的工作效率和数字化安全管理水平,设计了一种基于Modbus协议的湿度检定系统。该系统依托Modbus RTU协议模式、精密露点仪数据格式和Agilent34401A数字万用表可编程仪器的标准命令协议,实现了湿度发生器自动控制,提高了检定效率和数据安全性。湿度检定系统检定结果的扩展不确定度为1.3%。采用测量仪器特性评定和传递比较法对系统测量结果进行验证,测量结果均验证通过,表明系统可进行业务化应用。

水流速装置比对传递标准的评价方法研究

水流速装置是各式流速仪的检定校准装置,为考察各实验室装置量值复现的准确性,可实施装置间的计量比对。拟选用两台测速原理不同的流速仪作传递标准,针对仪器的测量重复性、长期稳定性和安装条件等在传递过程中会对比对结果产生影响的因素开展实验,并完成测量结果不确定度评定。在规定的考察时间和流速范围内,两台新流速仪做相同流速点测试实验。LS1206B转子式流速仪在测试中测量重复性保持在0.1%以下,稳定性在0.5%范围内,较之于Vector性能表现更好;LS1206B的水力螺距测量不确定度在高流速下更小,其不确定度主要来源有标准装置引入的流速不确定度、测量重复性引入的不确定度和仪器安装偏角引入的不确定度;若实际安装时偏角较大,会严重影响测量结果进而影响比对结果。另一台Vector声学多普勒流速仪在良好的信噪比环境下,重复性和稳定性都在1%以内,其不确定度来源有装置引入的流速不确定度和测量重复性引入的不确定度。

光纤传感测量软体排变形应变传递效率研究

软体排与传感光纤之间的应变传递效率是应用光纤传感技术监测软体排变形的关键。本文旨在探讨软体排变形时,排体与传感光纤之间的应变传递效率及其对测量准确性的影响。通过理论分析与试验研究表明,在线性拉伸条件下,应变能够高效地从排体传递至光纤,低传递效率线以下的区域主要位于传感光纤的边缘;而在弯曲变形条件下,变形测量误差与相对定点间距R呈线性相关,R=1.2时测量平均误差在-4%以内,而R=2.4~4.8时测量误差范围在-15%~-30%之间。研究成果可为河工模型试验测量技术以及光纤传感监测排体变形的现场应用提供参考。