A survey and evaluation was carried out on a potential granitoid quarry site in the locality of Linguésso (North West of Ivory Coast) with the aim of identifying and estimating the quantity of exploitable granite...A survey and evaluation was carried out on a potential granitoid quarry site in the locality of Linguésso (North West of Ivory Coast) with the aim of identifying and estimating the quantity of exploitable granite based on the electrical resistivity methods. The combination of electrical trailing, sounding and tomography techniques allowed the determination of the characteristics of the rock deposit, namely the electrical signature (between 19,259 Ωm and 86,316 Ωm), the extension (N90°), the rooting (between 0 and 45 m) and the fracturing (between N14° and N160°) of the granitic formation sought. The modeling resulted in an estimated mineable rock volume of 2,936,250 m<sup>3</sup> providing a production quantity of 7,927,875 tonnes.展开更多
基于Searle Center Database,用生存分析方法分析SEP免费政策对SSO成员生存率的影响。研究表明在ICT行业中,SEP免费政策反而会提高成员的生存率,当成员同时加入多个SSO或在其他SSO中声明SEP时,这种效应尤其明显。认为在复杂技术行业中,...基于Searle Center Database,用生存分析方法分析SEP免费政策对SSO成员生存率的影响。研究表明在ICT行业中,SEP免费政策反而会提高成员的生存率,当成员同时加入多个SSO或在其他SSO中声明SEP时,这种效应尤其明显。认为在复杂技术行业中,技术供给企业可能存在着迂回获利模式,SSO可以改进政策制定思路避免陷入"标准推广or标准质量"的两难选择。展开更多
A cw operation and a passively Q-switched （PQS） Ho：SSO laser （Cr2＋ ：ZnSe as a saturable absorber） end-pumped by a TIn：YAP laser operating at near room temperature are reported. It is the first time to report a...A cw operation and a passively Q-switched （PQS） Ho：SSO laser （Cr2＋ ：ZnSe as a saturable absorber） end-pumped by a TIn：YAP laser operating at near room temperature are reported. It is the first time to report a PQS Ho：SSO laser. For the ew mode, a maximum cw output power of 3.0 W is obtMned, corresponding to a slope efficiency of 31.4%. For the PQS mode, a Cr2＋ ：ZnSe is used as the saturable absorber, with transmission of 88.4% at 2112nm. A maximum pulse energy of 1.29mJ is obtained, corresponding to the pulse repetition frequency of 2.42kHz. In this study, we change the distance between Cr2＋ ：ZnSe and the output mirror to research the pulse characteristic of the PQ, S Ho：SSO laser. The minimum pulse width of 73.5ns is obtained, corresponding to the pulse energy of O. 9 mJ and the pulse repetition frequency of 2.65 kHz.展开更多
文摘A survey and evaluation was carried out on a potential granitoid quarry site in the locality of Linguésso (North West of Ivory Coast) with the aim of identifying and estimating the quantity of exploitable granite based on the electrical resistivity methods. The combination of electrical trailing, sounding and tomography techniques allowed the determination of the characteristics of the rock deposit, namely the electrical signature (between 19,259 Ωm and 86,316 Ωm), the extension (N90°), the rooting (between 0 and 45 m) and the fracturing (between N14° and N160°) of the granitic formation sought. The modeling resulted in an estimated mineable rock volume of 2,936,250 m<sup>3</sup> providing a production quantity of 7,927,875 tonnes.
文摘基于Searle Center Database,用生存分析方法分析SEP免费政策对SSO成员生存率的影响。研究表明在ICT行业中,SEP免费政策反而会提高成员的生存率,当成员同时加入多个SSO或在其他SSO中声明SEP时,这种效应尤其明显。认为在复杂技术行业中,技术供给企业可能存在着迂回获利模式,SSO可以改进政策制定思路避免陷入"标准推广or标准质量"的两难选择。
基金Supported by the National Natural Science Foundation of China under Grant No 61405046the Natural Science Foundation of Heilongjiang Province under Grant No 51305089
文摘A cw operation and a passively Q-switched （PQS） Ho：SSO laser （Cr2＋ ：ZnSe as a saturable absorber） end-pumped by a TIn：YAP laser operating at near room temperature are reported. It is the first time to report a PQS Ho：SSO laser. For the ew mode, a maximum cw output power of 3.0 W is obtMned, corresponding to a slope efficiency of 31.4%. For the PQS mode, a Cr2＋ ：ZnSe is used as the saturable absorber, with transmission of 88.4% at 2112nm. A maximum pulse energy of 1.29mJ is obtained, corresponding to the pulse repetition frequency of 2.42kHz. In this study, we change the distance between Cr2＋ ：ZnSe and the output mirror to research the pulse characteristic of the PQ, S Ho：SSO laser. The minimum pulse width of 73.5ns is obtained, corresponding to the pulse energy of O. 9 mJ and the pulse repetition frequency of 2.65 kHz.
