众筹出版成功率影响因素分析——以摩点网为例

众筹出版赋予出版新价值,为当下纸质出版的困境提供了解决方案,能够有效解决小众图书及绝版图书的出版困境,增加图书出版的社交属性,延长产业链,提高附加值,提升图书的收藏价值与升值空间。摩点网作为其中翘楚,提供了众筹出版成功的有效数据,借助多重线性回归分析方法,构建众筹出版成功率影响因素模型并进行分析。结果显示支持人数、基础档占比、更新数、档位数等因素对众筹出版的成功率有显著影响。众筹项目发起方应科学设立目标金额与档位,增加项目的透明度和曝光率,注重优质IP的选择。

基于众筹模式的档案文化创意产品开发策略研究——以摩点众筹网站为例

目前,档案文化创意产品开发已成为实现档案价值的重要方式之一,但国内档案文化创意产品开发仍存在着开发数量较少、产品种类单调、开发模式单一等难点。众筹是一种较为新颖的互联网融资模式,档案文化创意产品开发众筹有利于降低产品开发门槛,拓展资金来源,丰富开发渠道,激发开发创意。通过对国内最大的文化创意产品众筹网站——摩点众筹网的调研发现,该网站档案文化创意产品开发具有发起方以社会力量为主、解谜类文创占据主流、筹款金额差距大等特点,同时在总体项目数量、产品知名度、开发者的档案资源来源等方面问题突出,应从提供档案资源的档案机构、进行档案文化创意产品开发的社会力量和筹集开发资金的众筹平台三个方面出发探索基于众筹模式的档案文化创意产品开发策略。

众筹出版成功的影响因素探析——以摩点网出版类众筹金额榜单为依据

在如今略显疲态的出版行业,以众筹出版这一出版方式达成众筹金额超百万的出版项目,吸引了出版社、民营出版公司纷纷试水,让“众筹出版”再次活跃在出版行业。本文选择出版类众筹项目占有一定优势的摩点网众筹平台为主体,以摩点网出版类众筹金额榜单为依据,通过总体分析出版类众筹的环境,以出版物自身、项目发起主体两个角度分析众筹成功的出版物特点,总结在众筹出版时的注意事项,探讨众筹出版项目成功的影响因素,为选择众筹出版的出版方提供依据和参考。

多盘转静子系统轴向碰摩点分布研究

为分析转静子系统发生轴向碰摩时碰摩点的分布情况,建立了多盘转静子系统力学模型,综合考虑了盘在横向和纵向上的振动位移,应用弯曲变形理论确定了圆盘在两个方向上的转动角位移,基于平行四边形法则得到了圆盘的合成角位移,推导并给出了碰摩点分布及其轴向碰摩力的数学表达式。根据所推导的碰摩点轴向位移和轴向力公式,即可建立轴向碰摩时的振动微分方程。

探析众筹出版+“新文创”模式—以摩点网为例

众筹出版与新文创联合是互联网时代下众筹融资模式在出版产业领域的应用与延伸。摩点网在发展这一模式中具有重大代表性,本文从出版流程、监督机制、盈利模式等方面对摩点网现有模式进行剖析,以IE矩阵作为分析模型针对摩点网运营模式下的内外部影响因素赋予权重分数,从总权分数探析发现潜藏问题,针对问题从内部价值构造与外部生态两个方面对模式未来发展进行展望,以期众筹出版与新文创融合发展的新模式在未来获得更大的活力。

摩点网众筹出版的发展现状与提升策略

随着互联网的发展,众筹出版凭借新颖的出版形式、较低的投入风险和以销定产的优势成为出版行业的讨论热点。摩点作为新兴的众筹平台,以游戏众筹为起点,凭借成熟的运营模式和坚实的用户基础奠定了其在众筹出版领域的领头者地位,吸引了众多原创者和出版机构,推出了一批原创精品图书项目。但摩点在众筹出版中存在的知名度不足、售后服务不完善等问题同样不容忽视,需要平台方及时解决,从而实现良性发展。

影响实物回报类众筹平台项目融资因素的分析——以摩点网为例

本文从产品开发团队和产品需求者两个角度分析实物回报类众筹平台项目在法律层面:融资法规,盈利特点,知识产权保护;项目层面:项目介绍,预期回报;市场层面:消费趋势,政策影响等方面的差异,通过预期理论,后悔理论,消费者需求理论阐述其对产品用户以及开发团队心理及行为的影响,进而探讨影响其融资成功与否的因素。

文创产品众筹融资效率影响因素研究——以摩点众筹“2018TOP10”项目为例

伴随着互联网金融的蓬勃发展,众筹融资模式逐渐兴起,为我国文化创意产业的发展提供了新的融资渠道,缓解其在初创阶段融资困难、经营资金受限的压力。本文以摩点众筹"2018TOP10"项目为例,从项目自身、项目展示、项目融资设计、与投资者沟通四个层面进行分析,得出项目内容、项目类别、项目的文化内涵、项目的图片数量、项目的更新次数、目标金额、项目回报、项目评论数均对文创产品众筹融资效率产生影响的结论。同时,为我国文创产品众筹提供建议,以期提高项目的融资效率,进而推动文化产业的发展。

一种考虑径向-轴向碰摩的双盘转子-机匣系统力学模型的建立

建立一个新型径向-轴向复合碰摩转子-机匣系统力学模型,基于轴向碰摩由盘的偏转导致的假设,考虑到振动过程中转轴的挠曲线是一空间曲线,依据偏转角微小角度矢量合成原则,求解出偏转角的振动位移表达式,并以此为基础详细推导了双盘转、静子碰摩点的分布及运动微分方程。本模型既能同时描述转、静子的弯曲振动和扭转振动,又能描述转、静子间的轴向碰摩和径向碰摩,且轴向碰摩和径向碰摩既可以独立发生,亦可共同发生。所建立的力学模型为数值仿真分析,及进一步的研究径向-轴向复合碰摩系统的弯扭耦合非线性振动特性奠定了基础。

碰摩信号的小波表示及其相空间特征研究

对转子动静碰摩信号的相空间特征进行了分析和检测 ,分别用连续小波变换、多尺度分解、小波包和能量 尺度对比方法对动静碰摩振动响应的径向分量进行了研究 ,且在相空间得到了一些故障特征 .用连续小波变换分析碰摩信号时 ,与碰摩点相对应的小波系数分布在较小的尺度上 ,且随着尺度的减小 ,小波系数模极大值线逐渐收敛于碰摩点处 ;用多尺度分解方法得到的第 1级和第2级的细节信号中反映了碰摩点的特征 ,表现为局部极值点 ;用时间 尺度能量对比方法分析 ,这些特征表现得更为明显 .这些特征都有助于故障的准确诊断 .

按摩治疗小儿肌性斜颈30例

小儿肌性斜颈,又名胸锁乳突肌挛缩性斜颈,俗称"歪头",是一种小儿的常见病.笔者从1989年10月至1993年10月,在门诊采用按摩手法治疗小儿肌性斜颈30例,收到满意的效果,现叙述如下.

Friction stir keyholeless spot welding of AZ31 Mg alloy-mild steel

Friction stir keyholeless spot welding（FSKSW） using a retractable pin for 1.0 mm thick galvanized mild steel and 3 mm thick AZ31 B magnesium alloy in a lap configuration was investigated.The process variables were optimized in terms of the joint strength.The effects of the stacking sequence on joint formation and the joining mechanism of FSKSW AZ31B-to-mild steel joints were also analyzed.It shows that the process window and joint strength are strongly influenced by the stacking sequence of the workpieces.While the process window is narrow and unstable for FSKSW of a magnesium-to-steel stack-up,a desirable process was established for the steel-to-magnesium stacking sequence,a desirable process and higher strength joint can be got when the steel-to-magnesium stacking sequence.XRD phase and EPMA analyses of the FSKSW joint showed that the intermetallic compounds are formed at the steel-to-magnesium interface,and the element diffusion between the mild steel and AZ31 B magnesium alloy revealed that the joining methods for FSKSW joints is the main mechanical joining along with certain metallurgical bonding.

Fatigue behavior of friction stir spot welded AZ31 Mg alloy sheet joints

The fatigue behavior of friction stir spot welded （FSSW） AZ31 magnesium alloy sheet joints was investigated by tension- compression of fatigue test. The results suggest that all the fatigue failures occur at the stir zone of the FSSW AZ31 sheet joints, and all cracks initiate at the stir zone outer edge between the upper and lower sheet. When the cycle force equals 1 kN, the crack propagates along the interface of heat-affected zone and thermo-mechanical zone, simultaneously across the direction of force; while the cycle force equals 3 kN, the crack propagates along the diameter of stir zone and shear failure occurs finally. Moreover, the transverse microsections indicate that there is a tongue-like region at the outer edge of stir zone between the two AZ31 sheets, and the direction of tongue-like region is toward outside of the stirred zone and all fatigue cracks initiate at the tongue-like region.

Experimental Comparison Between PID Control and Friction Compensation Control for a Class of Nonlinear System with Friction

A point to? point positioning control of systems with highly nonlinear frictions is studied. In view of variable frictions caused by the changes of load torque, an experimental comparison was made between the valve? controlled hydraulic motor servo system with PID control and that with friction compensation control. Experimental results show that the gross steady errors are caused by frictions when the system is controlled by the conventional proportional control algorithm. Although the errors can be reduced by introducing the integral control, the limit cycle oscillation and the long setting time are caused. The positioning error for a constant load torque can be eliminated by using fixed friction compensation, but poor positioning accuracy is caused by the same fixed friction compensation when the load torques varies greatly. The dynamic friction compensation based on the error and change in error measurements can significantly improve the position precision in a broad range of the changes of load torque.

改进s-logQ法在基桩静载荷试验分析中的应用

简要分析了国内基桩静载荷试验中常用的s-logQ法的求取极限荷载Qu和划分桩侧阻力Qsu与桩端阻力Qpu的方法与特点,指出了该法的缺陷与不足,在分析端承—摩阻型基桩s-logQ曲线线型特征和该类桩型荷载传递与破坏机理的基础上,提出采用以△s/△logQ变形速率突变点视作摩阻极限发挥特征点,推导求得极限荷载Qu和桩侧阻力Qsu,并以杭州某一试桩工程为例作了具体探讨,可供相似条件下的同类工程借鉴、参考。

Evolving properties of friction stir spot welds between AA1060 and commercially pure copper C11000

Friction stir spot welding technique was employed to join pure copper （C11000） and pure aluminium （AA1060） sheets. The evolving properties of the welds produced were characterized. The spot welds were produced by varying the rotational speed, shoulder plunge depth using different tool geometries. The presence of a copper ring of different lengths was observed on both sides of the welds indicating that Cu extruded upward into the Al sheet which contributed to obtaining strong welds. The microstructure showed the presence of copper particles in the aluminium matrix which led to the presence of various intermetallics observed by the energy dispersive spectroscopy and X-ray diffraction. The maximum tensile failure load increases with an increase in the shoulder plunge depth, except for the weld produced at 800 r/min using a conical pin and a concave shoulder. A nugget pull-out failure mode occurred in all the friction stir spot welds under the lap-shear loading conditions. High peaks of Vickers microhardness values were obtained in the vicinity of the keyhole of most of the samples which correlated to the presence of intermetallics in the stir zone of the welds.

Microstructure and mechanical properties of dissimilar pinless friction stir spot welded 2A12 aluminum alloy and TC4 titanium alloy joints

The microstructure and mechanical properties of dissimilar pinless friction stir spot welded joint of2A12aluminum alloy and TC4titanium alloy were evaluated.The results show that the joint of Al/Ti dissimilar alloys can be successfully attained through pinless friction stir spot welding(FSSW).The joint can be divided into three zones(SZ,TMAZ and HAZ).The microstructure of joint in Al alloy side changes significantly but it basically has no change in Ti alloy side.At the same rotation speed,the maximum load of welded joints gradually rises with the increase in dwell time.At the same dwell time,the maximum load of the welded joint increases with the increase of the rotational speed.In addition,optimal parameters were obtained in this work,and they are rotation speed of1500r/min,plunge speed of30mm/min,plunge depth of0.3mm and dwell time of15s.The fracture mode of welded joints is interfacial shear fracture.The microhardness of the joint on the Al side distributes in a typical“W”type and is symmetry along the weld center,but the distribution of the microhardness on the Ti side has no obvious change.

Microstructure and properties of probeless friction stir spot welding of AZ31 magnesium alloy joints

The AZ31 magnesium alloy with a thickness of 1.8 mm was welded by the probeless friction stir spot welding process without Zn interlayer.The influence of process parameters on joint microstructure and mechanical properties was investigated by using different rotating speeds and dwell time.Microstructure of joints is divided into three regions:stir zone,thermomechanically-affected zone and heat-affected zone.With the increase of rotation speed and dwell time,the depth of stir zone gradually increases,and hook defects extend from the interface of two plates to the surface of the upper plate.The tensile shear strength of joints and two fracture modes(shear fracture and plug fracture)are closely related to hook defects.The maximum tensile shear strength of the joint is 4.22 kN when rotation speed and dwell time are 1180 r/min and 9 s,respectively.Microhardness value and its fluctuation in upper sheet are evidently higher than those of the lower sheet.

Comparison of microstructure and mechanical properties of conventional and refilled friction stir spot welds in AA6061-T6 using filler plate

Friction stir spot welding with refilling by friction forming process （FSSW-FFP） was successfully modified using filler plate. Both of this new refilling technique and conventional friction stir spot welding （FSSW） process were used to weld A1 6061-T6 lap shear specimens and the results were compared. Effects of tool rotational speeds on mechanical and metallurgical properties in both the cases were studied. Static shear strength of refilled weld samples was found to be better than those welded by conventional FSSW process at all tool rotational speeds. This is explained in terms of effective increase in cross-sectional area of weld nugget due to addition of more material from filler plate, thereby eliminating the probe hole. Failure mechanisms were discussed and fracture surfaces were analyzed through scanning electron microscopy （SEM）. The hardness profile of the welds exhibited a W-shaped appearance in both the processes and the minimum hardness was measured in the HAZ.

Development of processing windows for friction stir spot welding of aluminium Al5052/copper C27200 dissimilar materials

Friction stir spot welding technique was used to join dissimilar combinations of aluminium alloy(Al5052)with copperalloy(C27200)and friction stir spot welding windows such as tool rotational speed–dwell time and tool rotational speed?plungedepth diagrams for effective joining of these materials were developed.Using a central composite design model,empirical relationswere developed to predict the changes in tensile shear failure load values and interface hardness of the joints with three processparameters such as tool rotational speed,plunge depth and dwell time.The adequacy of the developed model was verified usingANOVA analysis at95%confidence level.Response surface methodology was used to optimize the developed model to maximizetensile strength and minimize interface hardness.A high tensile shear failure load value of3850N and low interface hardness valueof HV81was observed for joints made under optimum conditions,and validation experiments confirmed the high predictability ofthe developed model with error less than2%.The operating windows developed shall act as reference maps for future designengineers in choosing appropriate friction stir spot welding process parameter values to obtain good joints.