Study of a position-sensitive scintillator neutron detector

唐彬,; 孙志嘉,; 张强,; 杨振,; 许虹,; 杨桂安,; 王艳凤,; 吴冲,; 陈元柏,; 杨雷,

doi:10.1088/1674-1137/36/11/009

Cited by 16 publications

(17 citation statements)

References 7 publications

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“…When the replacement percentage is 75%, the splitting tensile strength of recycled concrete approaches that of normal concrete, while the replacement percentage is 25% and 100%, the splitting tensile strength of recycled concrete is obviously lower than that of normal concrete with 12.7% and 24.8%, respectively, and when the replacement percentage is 50%, the tensile splitting strength is 5.7% higher than that of normal concrete. These results does not agree with those of Yang et al [19], who thought that the recycled concrete tensile strength is decreased with the increase of recycled coarse aggregate replacement percentage. However, these results are consistent with the quasi static compressive test results of Xiao et al [20], who found that when the recycled coarse aggregate replacement percentage was 50%, the compressive strength of recycled concrete was higher than that of normal concrete.…”

Section: The Test Resultscontrasting

confidence: 89%

Experimental study on dynamic splitting of recycled concrete using SHPB

Cai

2015

EPJ Web of Conferences

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Abstract. To study the recycled concrete splitting tensile properties and fracture state with various recycled coarse aggregate replacement percentage (i.e. 0%, 25%, 50%, 75% and 100%), the dynamic splitting test of recycled concrete was carried out using large diameter (75 mm) split Hopkinson pressure bar (SHPB). The results show that the recycled concrete splitting tensile strength increases with the increase of loading rate, and the loading rate also affects the recycled concrete fracture state, which indicates that the recycled concrete has obvious rate sensitivity. The damage state of the recycled concrete is not only the destruction of the interface between coarse aggregate and cement mortar, but also associates with the fracture damage of aggregates. Under the same water cement ratio, when the replacement percentage of coarse aggregates is around 50%-75%, the gradation of natural and recycled coarse aggregate is optimal, and thus the splitting tensile strength is the largest. This study offers theoretical basis for the engineering applications of recycled concrete.

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Section: The Test Resultscontrasting

confidence: 89%

Experimental study on dynamic splitting of recycled concrete using SHPB

Cai

2015

EPJ Web of Conferences

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“…Total excision was performed in 54 cases out of 78 cases, (69.23%) of Sympson I in agreement of King"s study [24] as well as Solero and all [6] who respectively found Sympson I excision in 74 % and 96.5%. On the other hand, Liang Wu found Sympson I excision in 33.33% versus 66.67% Sympson II excision for cervical meningiomas because of the stranglehold of the vertebral arteries in the lesion [35,36] The using of cavitron is noted in (2 cases) 2.56% especially by Suzuki and Takeuchi [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] . The using of laser and cavitron in 2 cases were noted by Roux and King [19][20][21][22][23][24] .…”

Section: -Surgical Managementmentioning

confidence: 99%

A Rare Case of Extra Dural Dorsal Meningioma; Case Report and Analytique Review of Literature about 77 Cases

Koffi¹,

Salami

Elkacemi

et al. 2021

ijirms

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Spinal meningiomas are usually intra dural tumors, the purely extra dural localization is exceptional, they are easily mistaken for malignant tumor resulting in inadequate management. Only 77 cases have been reported in the literature. Less than 28 cases have been confirmed after durotomy since 1898. We report a new observation followed by an analytical review of the literature with a study of the socio-epidemiological, radiological parameters and of the neurosurgical and progressive management of extra dural spinal meningiomas. Observation: a 57-year-old, female patient with no medical history was admitted to our training for slow dorsal spinal cord compression progression since 06 months. Neurological examination found FRANKEL stage C paraplegia, higher level D7 hypoaesthesia without sphincter disorders. The medullary MRI objectified an intraspinal process of 1.5x2x1cm, well limited, of the right posterolateral of D8-D9 causing compression of the dorsal cord with an intramedullary hyper signal in T2. The D8-D9 laminectomy was performed. Surgical exploration found an extra dural lesion without intra dural extension. The excision was macroscopically complete. Histological examination was in favor of a benign meninigothelial. The post-operative course was marked by a partial and progressive recovery of the neurological deficit and no recurrence. Discussion: the retrospective analysis of literature about 49 publications was founded that, the incidence in 1933 by Elsberg was 5.5%, Haft in 1963 found 3.5%. In 2020 our study found 3.46% of all spine meningioma. The mean age is 44.19 years [8 years -85 years] with a female predominance of 2/1. The mode of revelation is in 11.53% of fortuitous discovery, in 59.93% by the high state of spinal cord compression stage C of FRANKEL. The topography is dorsal = 51.31%, cervical = 44.76%. MRI scan has been use since 1996 at 67.60%. Laminectomy was performed in 71.79% with durotomy in 11%. The excision is complete with SIMPSON I in 70% and SYMPSON III in 27%. The predominant histological is a grade 1 of meningioma = 73.41%, grade 2 = 6.32%, grade 3 = 1.26% in 19 % meningioma was not specified by the authors. Conclusion: The prognosis of extra dural spinal meningiomas according to our study is good overall with only 3 cases of recurrence of spinal meningioma in 36 patients, or 8.33% after a mean follow-up of 31.59 months [1 -168 months] with P=0,012.

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“…The internal resistance of GPTi (322.67 Ω) was also lower than that of UTi, indicating that G/PANI modification of the anode reduced the internal resistance of the entire MFC system. Since internal resistance is another important factor limiting the performance of MFCs for power generation [31,34], a reduction in internal resistance means an improvement in power generation of MFCs.…”

Section: G/pani Modification Of Anodementioning

confidence: 99%

Using Graphene/Polyaniline-Modified Electrodes Enhance the Performance of Two-Chambered Microbial Fuel Cells

Yang¹,

Wang²,

Zhou³

et al. 2017

Pol. J. Environ. Stud.

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The development of highly efficient modified electrodes is critical for enhancing the power output of microbial fuel cells (MFCs). In this study, different titanium electrodes were modified with functionalized graphene, polyaniline, and their composite (G/PANI) for use in two-chambered MFCs. The results showed that graphene, polyaniline, and G/PANI modification of the cathode improved the maximum power density of MFCs by 74%, 40%, and 126%, respectively, compared with the unmodified control. Among the three materials, G/PANI modification of the anode resulted in the highest open-circuit voltage of MFCs (0.71 V) and recorded the longest operating time for three consecutive cycles (110 h). G/PANI was superior to the other two materials in terms of power generation and it also extended the duration of the operating cycle of MFCs. G/PANI modification of both the cathode and anode improved the maximum power density of MFCs to 124.84 mW•m -2 ; this value was 24.8% and 18.9% higher than those obtained by simple modification of the cathode and the anode, respectively. The duration of the operating cycle of MFCs was also markedly extended to 35 h after G/PANI modification of both the cathode and anode. SEM results revealed that the increase in power generation of MFCs with G/PANI-modified electrodes could be attributed to the high surface area of electrodes and the large number of bacteria attached to electrodes. These results have demonstrated that the G/PANI composite can be effective materials for modifying electrodes and improving power generation in two-chambered MFCs.

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Study of a position-sensitive scintillator neutron detector

Cited by 16 publications

References 7 publications

Experimental study on dynamic splitting of recycled concrete using SHPB

Experimental study on dynamic splitting of recycled concrete using SHPB

A Rare Case of Extra Dural Dorsal Meningioma; Case Report and Analytique Review of Literature about 77 Cases

Using Graphene/Polyaniline-Modified Electrodes Enhance the Performance of Two-Chambered Microbial Fuel Cells

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