高职“三进阶”高端技能人才培养模式设计与实施——以工业分析与检验专业为例

从高等职业院校定位出发,明晰了高职人才培养模式的定义。考虑到社会需求、企业要求和新生学情,具体以高职工业分析与检验专业为例,设计出一套既适用于高职学生学习又符合社会对高端技能人才要求的基于认知顺序的三进阶人才培养模式。     

An algebraic approach to the non-symmetric Macdonald polynomial

In terms of the raising and lowering operators, we algebraically construct the non-symmetric Macdonald polynomials which are simultaneous eigenfunctions of the commuting Cherednik operators. We also calculate Cherednik's scalar product of them.     

微波辅助-顶空液相微萃取在线联用-高效液相色谱法测定环境水样中的敌敌畏

基于微波辅助-顶空液相微萃取联用(MAE-HS-LPME)这一样品前处理方法,采用高效液相色谱法(HPLC)对水样中的敌敌畏残留量进行了测定。对影响萃取的因素如萃取剂、微波辐射功率、萃取时间、离子强度和样品基质的pH值等进行了考察。萃取条件为: 选用二甲苯作萃取剂,萃取时间为15 min,微波辐射功率300 W,NaCl含量为5%,pH为2.5。在最佳条件下,敌敌畏的检出限(信噪比为3时)为0.96 μg/L,定量限(信噪比为10时)为3.20 μg/L,萃取富集倍数为54,实际水样的加标回收率为87.4%～103%。与传统的前处理方法相比,本方法具有简便、快速、高效、节省溶剂、选择性好、应用范围广的特点。     

基于SPH方法模拟30mm线膛炮波纹罩压垮过程的力学参数研究

为研究高旋转对30 mm聚能装药破甲作用的影响机理及自旋补偿原理,采用LS-DYNA有限元软件中的SPH方法模拟30 mm线膛炮波纹罩的压垮过程,得到粒子的实际运动可分解成向心运动与绕中心圆周切线运动,提出压垮过程的4个阶段:压垮前期、缓冲期、波纹槽区域粒子速度增大期和中心粒子相互作用期。射流形成层沿逆时针方向旋转,而形成杵体的材料以相反方向旋转。结果表明:波纹罩特殊设计可以补偿旋转扰动对30 mm聚能装药侵彻作用的负面影响。     

The polarization characteristics of lithium-ion batteries under cyclic charge and discharge

Journal of Solid State Electrochemistry - A high-fidelity electrochemical-thermal coupling was established to study the polarization characteristics of power lithium-ion battery under cycle charge...     

Cellulose insulation paper with high thermal stability and low polarizability: influence of different substituents on POSS modified cellulose insulating paper

Cellulose - Polyhedral oligomeric silsesquioxane (POSS) has eight substituent groups, which can be substituted with various substances to obtain different modification effects. In order to study...     

产教融合下的高职“绿色生产链”实验课程体系——以药品生产技术专业为例

实验教学是高等职业教育深化产教融合的重要部分。重庆工业职业技术学院在实施产教融合的教学改革中,对药品生产技术专业的实验课程体系进行了优化,构建了“绿色生产链”式实验课程体系,内容包括生产链式实验课程体系框架、绿色环保微量实验内容和“O2O”实验教学手段等。通过改革,实现了药品生产技术专业实验教学的“做学相融”和“产学相融”,提升了学生的综合实践技能、职业综合素养和解决实践问题的能力。     

Performance and mechanisms of NaOH and ball-milling co-modified biochar for enhanced the removal of Cd2+ in synthetic water: A combined experimental and DFT study

A multifunction magnetic carbonaceous adsorbent (MBM/OH/BC) was synthesized by facile NaOH and ball-milling co-modified biochar, and applied for removing Cd²⁺ in water. The results showed MBM/OH/BC exhibited excellent adsorption capacity (183.59 mg/g for Cd²⁺), short equilibrium time (60 min) and good reusability (the declining efficiency <20% after four adsorption and desorption cycles) compared with pristine biochar. Meanwhile, the modification mechanisms of NaOH and ball-milling to biochar were explored by a series of characterizations (XRD, SEM-EDS, BET, XPS and FTIR, et al). The results indicated the remarkable adsorption performance of MBM/OH/BC was mainly attributed to the co-modification significantly increased the specific surface area, mineral content and cation exchange capacity of biochar, thereby further improving the precipitation, cation exchange and complexation with Cd²⁺. In addition, the results of adsorption mechanisms showed that the joint contribution proportion to the total adsorption capacity of precipitation, cation exchange and complexation was up to 90%, indicating the three mechanisms were the primary adsorption mechanism. To sum up, NaOH and ball-milling co-modification was an effective strategy to increase the adsorption capacity of the pristine biochar for heavy metals from water.     

矩形封闭声腔壁板轻量化对声固耦合特性的影响

基于模态耦合法建立了考虑对侧柔性壁板的矩形封闭腔体声固耦合模型,导出了耦合系统声振响应随柔性板材料属性及厚度变化的近似关系.通过数值仿真计算,详细分析了单柔性板-单侧激励、双柔性板-双侧激励及双柔性板-单侧激励三种情况下板的轻量化设计对系统声固耦合特性及腔内声压响应的影响.结果表明:对于单柔性板-单侧激励及双柔性板-双侧激励情况,低频段腔内声压主要取决于板厚,其次是杨氏模量,而与板密度关系较弱.因此使用适当增厚的轻质板可以同时达到减重和低频区降噪的目标.对于双柔性板-单侧激励情况,适当的轻量化设计可以显著增强两板间低频段振动的耦合,从而降低该频段的声腔模态响应及腔内噪音.在中高频段,增加板厚和材料密度对降低三种情况的腔内声压均有利。