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| 1 | Flow characteristics of tangential leakage in a scroll compressor for automobile heat pump with CO_(2)显示文摘Tangential leakage loss reduction has great significance on improving the performance of scroll compressors.In this study,the flow field of a scroll compressor working with CO_(2) was numerically investigated.The development characteristics of the tangential leakage flow in different working chambers were carried out,which was obtained by analyzing the field quantities distributions.The impacts of the radial clearances and sidewall roughness on the tangential leakage were also taken into consideration,in order to explore the feasible method of the flow control for the tangential leakage in scroll compressors.Results showed that the tangential leakage flow had various characteristics in the suction and compression chambers due to the different interactions between the tangential leakage flow and mainstream.Owing to little reverse pressure gradient,the tangential leakage flow maintained the typical jet form in the suction chambers.By contrast,the mixing of the tangential leakage flow and mainstream induced the passage vortex and secondary flows in the compression chamber.The secondary flow was the primary factor that results in the occurrence of localized high temperature region rather than the tangential leakage.With the increase of the radial clearance,the volumetric efficiency declined and the discharge temperature increased rapidly.In terms of flow control of the tangential leakage,the increase of sidewall roughness by 2μm could achieve the same effect as the decrease of the radial clearance by 4μm,while the volumetric efficiency increased by almost 5%and average discharge temperature decreased by 5K. | ZHENG SiYu WEI MingShan HU ChenXing SONG PanPan TIAN Ran | 2021 | Science China(Technological Sciences)2021，64，5： | 4 |
| 2 | Experimental study of a micro-scale solar organic Rankine cycle system based on compound cylindrical Fresnel lens solar concentrator显示文摘In the present study, a micro-scale solar organic Rankine cycle power generation system was developed. The system comprises of a solar collection system based on compound cylindrical Fresnel lens concentrator and an organic Rankine cycle power generation system integrated with a scroll expander. YD320 and R245 fa were used as the heat transfer fluid and the working fluid, respectively. The effects of the evaporation pressure, the degree of superheat, and the mass flow rate of the working fluid were analyzed to evaluate the solar collection efficiency, the electric power output, the thermal efficiency and exergy efficiency of the system. The results illustrate that both the increasing evaporation pressure and decreasing superheat degree have positive impacts on solar collection efficiency. The electric power increases as the evaporation pressure increases, while the thermal efficiency and the exergy efficiency decrease. However, the system overall efficiency decreases slowly due to the increase of solar collection efficiency. The electric power increases with the increment of the working fluid mass flow rate. The increasing mass flow rate has no visible impact on the thermal and exergy efficiencies of organic Rankine cycle subsystem, whereas a slightly increase of the thermal and exergy efficiencies of the integrated system. The electric power decreases with the increase of the superheat degree, whereas the thermal and the exergy efficiencies of the system increase. The system works more suitably with a higher degree of superheat for the small mass flow rate condition. | MENG Jia SONG PanPan WEI MingShan TIAN GuoHong ZHAO Meng ZHENG HongFei HU GuangDa | 2019 | Science China(Technological Sciences)2019，62，12： | 3 |
| 3 | Study on the Clinical Effectiveness of Thymectomy for Myasthenia Gravis显示文摘Objectiv:To investigate the theoretical basis and clinical significance of thymectomy in the treatment of myasthenia gravis (MG). Methods:Analyze the changes in the contents of serum AchRab and sIL-2R, lymphocyte subtypes in Peripheral blood lymphocytes before and after thymectomy in 69 patients. Results:In the study group significant changes were found in serum contents of AchRab and sIL-2R before and after operation and there was also remarkable change in the number and constitution of peripheral blood lymphocyte subtypes. Conclusion:Thymectomy is an effective therapy for MG. | PAN Tiecheng, YAN Hua, ZHANG Ni, PAN Youming, TANG Yingxiong, WEN Xiang, SONG Dingwei, HU Ming, LIU Ligang, LIU Zixiong, YANG Mingshan, XU Jinzhi, PU Bitao, GAO Boting Department of Thoracis Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China | 2002 | The Chinese-German Journal of Clinical Oncology2002，1，1： | 1 |
| 4 | Stress corrosion cracking behaviors of RE-containing ME21 magnesium alloy processed by equal-channel angular pressing显示文摘A commercial as-cast ME21 magnesium alloy containing rare-earth (RE) element was processed by equalchannel angular pressing to obtain fine-grained micro structure. Stress corrosion cracking (SCC) behaviors of the fine-grained samples were studied by slow-strain-rate testing in air, distilled water and Hanks’solution at the strain rate of 1×10^(-6) s^(-1). All samples show a relatively low SCC sensitivity in distilled water but a great SCC tendency in Hanks’ solution. The microscopic observations of the fracture surfaces and the side surfaces reveal obvious active anodic dissolution and hydrogen embrittlement cracks, which indicate the higher SCC susceptibility in Hanks'solution. The fine-grained microstructure with more crystal defects promotes the passivation process of the oxide film and restrains the hydrogen induced cracking of the ME21 magnesium alloy, leading to the higher general corrosion resistance as well as SCC resistance. | Jinghua Jiang Qiuyuan Xie Mingshan Qiang Aibin Ma Evans-Kwesi Taylor Yuhua Li Dan Song Jianqing Chen | 2019 | Journal of Rare Earths2019，37，1： | 1 |
| 5 | Sun-tracking Multi-layer Stereo-cultivation System Improves Canopy Light of Strawberry显示文摘In order to efficiently solve the shading problem between the upper layer and lower layer in the same cultivation system and between adjacent cultivation systems in multi-layer stereo-cultivation of strawberry,and to improve the fixed A-frame system,a novel cultivation system-sun-tracking system was developed that could keep north-south line of cultivation frame parallel to sunray to make the best use of direct light.In this study,crop canopy light condition of sun-tracking and fixed systems were tested and compared.Results showed that integrated PPF of sun-tracking system is higher than that of fixed system in both middle and lower layers.On sunny day compared with fixed system,integrated PPF on middle and lower layer of suntracking system increased by 16.0%,9.1% in January and 19.6%,4.1% in February,while on cloudy day improvement on light condition of sun-tracking system is not evident as sunny days.Thus sun-tracking system can effectively alleviate shading problem between layers and improve plant canopy light environment. | Chunling WANG Jianing LI Yongzhi ZHAO Mingshan QU Weitang SONG Shumei ZHAO | 2016 | Agricultural Science & Technology2016，17，7： | 0 |
| 6 | Election Procedure for Rural Two Committees显示文摘In order to further strengthen the construction and improvement of villager autonomy system with democratic election,democratic decision making,democratic management,and democratic supervision of rural two committees with Chinese characteristics,experience of work team of Longyang District Agricultural Technology Extension Station dispatched to villager committees( or offices) and their guidance on election of rural two committees in 2007-2016 were used,and exploration was made for election of rural two committees from the third to the sixth committees. It summarized achievements and main problems in election of rural two committees and came up with pertinent recommendations.The results of this study are expected to provide certain reference for theory and practice of future villager autonomy. | Lin ZENG Wenbin SU Chaozhong ZHANG Shunsheng LU Yunfei SONG Guotian YANG Mingshan LIAO Zhenzhao SAI Yan LIU | 2017 | Asian Agricultural Research2017，9，5： | 0 |
| 7 | In situ enzyme immunoassays with tissue smears to study horizontal transmission of BMNV in penaeid shrimp and in beach animals显示文摘An enzyme immunoassay technique is developed for detecting the baculoviral midgut gland necrosis virus (BMNV) in penaeid shrimp and beach anieds. An antiserum was obtained from rabbits immunized with a BMNV preparation Purified from Penaeus japonicus. γ-globulin was isolated and labelled with horseradish peroxidase (HRP). This reagent was used to detect the virus in penaeid shrimp experimentally infected with the BMNV preparation, in cultured penaeid shrimp and in several beach animals. The technique is specific, simple and sensitive and can be developed into a practical method for the detection of penaeid shrimp viruses. Among 128 tissue samples from 11beach animals, 77 samples gave positive reactions with the enzyme-labelled immunoglobulin against BMNV from P.japonicus. These animals could possibly constitute a horizontal transmission pathway for cultured penaeid shrimp viruses. | Song Siyang Luo Wenxin Chen Jin’ an Shen Mingshan and Su Wenjin | 1999 | Acta Oceanologica Sinica1999，18，1： | 0 |
| 8 | Leptomeningeal metastasis from central nervous system tumors: A study of classification and stage in the spinal canal of 58 patients显示文摘Leptomeningeal metastasis (LM) is caused by the spread of malignant tumor cells into the subarachnoid space.However,classification and staging of LM in the spinal canal is rare in the literature.The authors reviewed the records of 58 Chinese patients with LM for clinical features,neuroimaging,and treatments.Gadolinium-enhanced magnetic resonance imaging (MRI) of brain and spinal cord were performed in all patients.Removal of intracranial tumors was performed in all patients and diagnoses were confirmed by histology.The study group consisted of 58 patients,with 29 cases presenting with intraspinal symptoms.Of the 58,8 patients underwent intraspinal tumor removal,8 received radiotherapy alone,9 received chemotherapy alone,and 34 patients received combined radiochemotherapy.We classified LM into 3 types:type L or leptomeninges LM,is subdivided into 2 subtypes (subtype LI and LII (a,b)),type N or nerve root LM is subdivided into 2 subtypes (subtype NI and NII (a,b)),and type M or mixed-type LM.We also divided LM into stages of I-IV according to the symptoms and the volume of the tumor based on spinal axial MRI.Type LI LM often occurs in patients with intracranial and intraspinal tumors found simultaneously.Patients who receive surgery for intracranial tumors may present with type N LM.Surgery is suitable for patients with NI LM and LIIb LM in stages III-IV,presenting with severe spinal symptoms.The prognosis is better for type N LM than type L LM. | ZHANG MingShan OU YunWei ZHANG HongWei ZHANG JunPing XIA Lei QU YanMing WANG HaoRan ZHAN QiMin SONG YongMei YU ChunJiang | 2012 | Chinese Science Bulletin2012，57，22： | 0 |
| 9 | Infant guinea pig retina model of glutamate toxicity and intervention of basic fibroblast growth factor显示文摘Impaired vision with oligemic ophthalmopathy is a result of excitotoxicity caused by excitatory amino acids, resulting in pathological changes, such as loss of retinal neurons and in particular retinal ganglionic cells. The present study utilized infant guinea pigs, aged 45-50 days, to establish injury models via intraperitoneal injection of fixed sodium glutamate doses. Results from hematoxylin- eosin staining revealed significantly reduced retinal ganglionic cell numbers and retinal damage at 10 days after 7 consecutive days of 3 g/kg sodium glutamate treatment; these animals served as the injury model group. In addition, models of moderate injury (glutamate 3 g/kg daily, for 7 consecutive days) were intraperitoneally pretreated with basic fibroblast growth factor (800 U/kg daily). Immunohistochemistry results confirmed reduced anti-apoptotic gene bcl-2 expression in the ganglion cell layer of glutamate-injured guinea pigs. Expression of the pro-apoptotic gene caspase-3 was increased in the ganglion cell layer and inner plexiform layer. Somatostatin expression was primarily distributed in the ganglion cell layer and inner nuclear layer. Expression of the presynaptic element synaptophysin was weak. However, following basic fibroblast growth factor injection, expressions of the above-described bioactive molecules were reversed, which suggested that basic fibroblast growth factor exerted protective effects on sodium glutamate-induced retinal injury in infant guinea pigs by regulating expression of synaptophysin, somatostatin, Bcl-2, and caspase-3. | Yunzhi Shi Lihua Wei Mingshan Song Min Chen Changqing Du Baoliang Sun | 2011 | Neural Regeneration Research2011，6，7： | 0 |
| 10 | Research on Operation of Electrothermal Integrated Energy System Including Heat Pump and Thermal Storage Units Based on Capacity Planning显示文摘In view of the Three North areas existing wind power absorption and environment pollution problems,the previous scholars have improved the wind abandon problem by adding electrothermal coupling equipment or optimizing power grid operation.In this paper,an electrothermal integrated energy system including heat pump and thermal storage units was proposed.The scheduling model was based on the load data and the output characteristics of power units,each power unit capacity was programmed without constraints,and the proposed scheduling model was compared with the traditional combined heat and power scheduling model.Results showed that the investment and pollutant discharge of the system was reduced respectively.Wind power was fully absorbed.Compared with the traditional thermal power unit,the proportion of the output was significantly decreased by the proposed model.The proposed system could provide a new prospect for wind power absorption and environment protection. | Taihong Liu Dingchen Wu Fei Xu Panpan Song Mingshan Wei Jian Wu Xiaochun Bai | 2021 | Energy Engineering2021，118，3： | 0 |
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