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Ma K.-R.,Huaiyin Normal University | Ma K.-R.,Jilin University | Shi J.,718th Research Institute of China Shipbuilding Industry Corporation | Shi J.,Jilin University | And 2 more authors.
Journal of Molecular Structure | Year: 2012

The first example of cadmium complex containing methyl orange [MO, (CH 3) 2NC 6H 4N = NC 6H 4SO 3Na], formulated as [Cd(en) 2(H 2O) 2](MO) 2 1 (en = ethylenediamine) was synthesized hydrothermally and characterized by single-crystal X-ray diffraction, IR, XRD, elemental analysis and Raman spectroscopic analysis. Compound 1 display a two-dimensional supramolecular layer structure with ladder-like supramolecular chain by X-ray crystallographic analysis. MO anion immobilized by H-bonds, as acid-base indicator, shows a similar behavior in comparison with its solution counterpart in terms of response to pH. © 2012 Elsevier B.V. All rights reserved.


Su J.,Dalian University of Technology | Zhou J.,Dalian University of Technology | Zhou J.,718th Research Institute of China Shipbuilding Industry Corporation | Liu C.,Dalian University of Technology | And 2 more authors.
Cuihua Xuebao/Chinese Journal of Catalysis | Year: 2010

Gas phase epoxidation of propylene was performed by directly contacting propylene and gaseous H2O2 on the surface of TS-1 catalyst in an integrated reactor. The gaseous H2O2 was produced in situ by a H2/O2 plasma. The H2O2 formation rate can be enhanced by increasing the power density of the H2/O2 plasma reactor. The yield and selectivity for propylene oxide (PO) can be increased by optimizing the reaction conditions and using suitable TS-1 catalysts. With a power injection of 3.5 W, flow rates of H2, O2, and propylene of 170, 8, and 18 ml/min, respectively, catalyst loading of 0.8 g, and epoxidation temperature of 110°C, the yield and selectivity for PO and the utilization rate of H2O2 were 246.9 g/(kg · h), 95.4%, and 36.1%, respectively. During the gas phase reaction, no decline of TS-1 activity was observed.


Ji L.,Shenyang Aerospace University | Ji Y.,Dalian Jiaotong University | Lian X.F.,718th research institute of china shipbuilding industry corporation
Advanced Materials Research | Year: 2013

For a blow-off tunnel running, there is the large delay and lag issues. We established a mathematical model of the wind tunnel Mach number control by the test modeling method, then analysed the pros and cons of various control methods based on BP neural network control algorithm. Put forward genetic algorithm optimization neural network adaptive control method to solve the large inertia of the wind tunnel system, and large delay. A large number of simulation studies, run a variety of operating conditions for the wind tunnel simulation proved that the improved adaptive neural network PID control method is reasonable and effective. © (2013) Trans Tech Publications, Switzerland.


Su J.,Dalian University of Technology | Xiong G.,Dalian University of Technology | Zhou J.,Dalian University of Technology | Zhou J.,718th Research Institute of China Shipbuilding Industry Corporation | And 5 more authors.
Journal of Catalysis | Year: 2012

The nature of the amorphous Ti species in titanium silicalite-1 (TS-1) was investigated by UV Raman spectroscopy (UV Raman), UV-vis diffuse reflectance spectroscopy (UVDRS), infrared spectroscopy (IR), and Hammett indicator titration methods. A new Raman feature at 700 cm -1, which is closely related to the UVDRS band at 260-280 nm, is first assigned to a totally symmetric vibration of hexacoordinated Ti-O-Ti linkages of the amorphous Ti species. The amorphous Ti species in TS-1 can be formed easily under the synthesis conditions in the presence of Na + or after treatment in ammonia solution. The results reveal that the amorphous Ti species is the main factor in the enhanced acidity and H 2O 2 decomposition ability of TS-1. A sulfosalt impregnation method has been proved effective in reducing the adverse effect of the amorphous Ti species. © 2011 Elsevier Inc. All rights reserved.


Niu Z.,718th Research Institute of China Shipbuilding Industry Corporation | Guo J.,718th Research Institute of China Shipbuilding Industry Corporation | Zhou X.,718th Research Institute of China Shipbuilding Industry Corporation
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2015

The thermo-mechanical model of the deformable mirror based on ANSYS multiphysics is provided and calculated. High-energy laser radiation results in a mirror deformation of about 0.9 μm. Therefore, according to the characteristic distribution of the thermally-induced deformation, a compensation method is proposed. The compensation mirror, placed in the optical path after the deformable mirror, is composed of a thin mirror and some restriction parts. By contrast with the poles of the deformable mirror, the restriction parts of the compensation mirror are installed in a staggered order. Three types of compensation mirrors with different shapes of restriction parts are calculated. The results show that the values of the thermal deformation reduce to 0.35 μm, 0.32 μm and 0.40 μm. Using the BPF (beam propagation factor) to evaluate the compensation effect,the results indicate that the BPF value increases from 0.906 to 0.966, 0.971 and 0.957. Further calculations show that the size of the restriction parts has little effect on the compensation effect. ©, 2015, Editorial Office of High Power Laser and Particle Beams. All right reserved.


Hu P.,Huazhong University of Science and Technology | Zhu H.,Huazhong University of Science and Technology | He C.,Huazhong University of Science and Technology | Ren X.,718th Research Institute of China Shipbuilding Industry Corporation
Advances in Mechanical Engineering | Year: 2014

A coupled finite volume-element method is developed to simulate the transient thermal deformation of water-cooled mirror by considering fluid flow and convective heat transfer. The simulation process consists of two steps: the 3D finite volume models of fluid flow and heat transfer equation are solved to obtain the time-dependent temperature field by using CFD; then, the obtained temperature field used as final temperature field is unidirectionally coupled to the finite element model for solving the thermoplastic equation. It is concluded that fluid flow not only affects the magnitude of temperature rise and thermal deformation, but also affects the distribution of temperature and thermal deformation. The temperature gradient in the thickness direction (z direction) is found to be much larger than that in transverse direction. It is found that the temperature and the consequent deformation of water-cooled mirror increase significantly in the first seconds and gradually become steady state in the subsequent time. Experiments are conducted to estimate the precision of numerical models, and the experimental results agree well with the simulated results. © 2014 Panpan Hu et al.


Luo S.,718th Research Institute of China Shipbuilding Industry Corporation | Wang S.,718th Research Institute of China Shipbuilding Industry Corporation | Qin L.,718th Research Institute of China Shipbuilding Industry Corporation | Pang F.,718th Research Institute of China Shipbuilding Industry Corporation
International Conference on Nuclear Engineering, Proceedings, ICONE | Year: 2013

Hydrogen concentration measuring technologies in containment can play an important role in preventing radioactive materials leakage and ensuring the safety of people and property in nuclear accident. However, as a confined space, the environmental condition in the containment during a severe accident is very complex and harsh, with high temperature, high pressure, high humidity and high-level radioactive. Thus, it is an issue worth exploring how to ensure the availability, safety and measurement accuracy of the hydrogen measuring devices in such special conditions. This article reviews the hydrogen measuring technology and related products currently used in nuclear power plant in the world. Because of the particularity of the severe accident conditions, some measuring technology and related products need further improvement and perfection. After the Fukushima nuclear accident, the technology for measuring hydrogen concentration in containment has become more compelling. The CH-15 type hydrogen concentration measuring device, which was independent developed by the 718th Research Institute, was briefly introduced in the end of this article. With deepening understanding of nuclear accident by nuclear power industry, the advanced hydrogen measuring devices will be widely used in nuclear power plant in the world, which will be helpful to improve the safety level of nuclear power plant. Copyright © 2013 by ASME.


Luo S.,718th Research Institute of China Shipbuilding Industry Corporation | Wang S.,718th Research Institute of China Shipbuilding Industry Corporation | Qin L.,718th Research Institute of China Shipbuilding Industry Corporation | Pang F.,718th Research Institute of China Shipbuilding Industry Corporation
International Conference on Nuclear Engineering, Proceedings, ICONE | Year: 2013

The hydrogen explosion in Fukushima nuclear accident seriously challenged the safety of nuclear power plants in the world. Therefore, strengthening hydrogen concentration measurement in containment has become very important. To raise the nuclear safety level of in-service and under construction nuclear power plants in China, based on a document which was issued by the National Nuclear Safety Administration of China (NNSA, 2012), the function requirements, components, storage, and arrangement outlines of the hydrogen monitoring system after a severe accident was thoroughly analyzed in this article. Besides, two kinds of techniques for hydrogen concentration measurement in containment, respectively for direct measuring method and gas sampling measuring method, were also discussed and compared. Notably, based on the direct measuring method, the 718th Research Institute successfully developed the CH-15 type hydrogen concentration measuring device that suitable for used in severe accident. The hydrogen sensor, with independently intellectual property rights, is based on catalytic principles and installed inside the containment. It has many unique characteristics, such as wide measurement range, high measurement accuracy, and is capable of continuous measurement with multiple points. This device has simple structure and small size, with low energy consumption, so it is very suitable for being installed in the in-service and under construction nuclear power plants in China and abroad. Copyright © 2013 by ASME.


Zhang T.,CAS Beijing National Laboratory for Molecular | Zhang T.,718th Research Institute of China Shipbuilding Industry Corporation | Chen F.,CAS Beijing National Laboratory for Molecular | Ma Y.,CAS Beijing National Laboratory for Molecular | Qi L.,CAS Beijing National Laboratory for Molecular
Journal of Nanoscience and Nanotechnology | Year: 2016

Recently, material scientists have paid a lot of attention on the synthesis of one dimensional peapodlike nanostructures composed of metal nanoparticles and inorganic nanofibers due to their superior properties. In this work, we realized the synthesis of Au-TiO2 nanopeapods by using Au-bacteria cellulose nanofibers as templates in aqueous solution through a simple sol-gel method. Reaction conditions such as the Au contents in the gold-bacteria cellulose nanofibers, the reaction times and the calcination temperatures were investigated in detail for the synthesis of nanopeapods of Au-TiO2. The photocatalytic degradation tests show that the presence of a small amount of Au nanoparticles can improve the photocatalytic performance of Au-TiO2 nanocomposites compared with pure TiO2 nanofibers. The strategy to synthesize peapodlike Au-TiO2 nanocomposites by using biotemplates may shed light for the synthesis of other peapod-like nanostructures. Copyright © 2016 American Scientific Publishers All rights reserved.


Chi W.,718th Research Institute of China Shipbuilding Industry Corporation | Ren X.,718th Research Institute of China Shipbuilding Industry Corporation | Guo J.,718th Research Institute of China Shipbuilding Industry Corporation | Wei C.,718th Research Institute of China Shipbuilding Industry Corporation
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2014

The axis of precise optical systems is sensitive to the mount platforms' structural deformation and vibration, and the puny structural deformation and vibration are able to directly affect the optical system stability and light-beam alignment precision. This paper analyzes the vibration and noise reduction design defect of traditional rigid connection and spherical joint connecting structure of optical mount platform. By adjusting the mount platforms' support and sealing connection, the design of flexible sealed connection between the amount platform and resonator was brought forward. The modal analysis of the double-layer platform frame was carried out with ANSYS finite element method, the beam spot jitter experiment was completed. The modal analysis showed that the first order modal frequencies of the two platforms were increased to 126.5 Hz and 172.3 Hz after optimization with a large folded-cavity. The design adopted the large folded-cavity was tested with a He-Ne laser, the results show that the near-field beam spot's typical position and profile changed punily during the resonator box evacuation, and the far-field beam spot jitter angle approached 3.73″ (RMS) during the continuous laser operation.

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