创业投资管理问题研究

创业投资管理是保证创业投资获得良好投资效果的有效途径。论述创业投资风险管理、高速管理和高能管理的含义和方法,并对创业投资及风险企业管理提出几点看法。

An ATMS data-driven method for signalized arterial coordination

In order to minimize the delays and stops caused by the early started coordinated green phase of the vehicle- actuated signal systems, a stochastic offsets calculation method based on the new types of advanced traffic management system （ATMS） data is proposed. As the mainline green starts randomly in vehicle-actuated signal systems, the random theory is applied to obtain the distribution of the unused green time at side streets based on the green gap-out mechanism. Then, the green start time of the mainline can be selected at the point with maximum probability to minimize the delays or stops caused by the randomly started mainline green. A case study in Maine, USA, whose traffic conditions are similar to those of the middle-size Chinese cities, proves that the proposed method can significantly reduce the travel time and delays.

EBS-Based Collusion Resistant Group Key Management Using Attribute-Based Enc ryption

The m ajor advantages of EBS-based key rrkanagerrent scheme are its enhanced network survivability, high dynamic performance, and better support for network expansion. But it suffers from the collusion problem, which means it is prone to the cooperative attack of evicted members. A novel EBS-based collusion resistant group management scheme utilizing the construction of Ciphertext-Policy Attribute-Based Encryption （CP-ABE） is proposed. The new scheme satisfies the desired security properties, such as forward secrecy, backward secrecy and collusion secrecy. Compared with existing EBS-based key rmnagement scheme, the new scheme can resolve EBS collusion problem completely. Even all evicted members work together, and share their individual piece of information, they could not access to the new group key. In addition, our scheme is more efficient in terms of conmnication and computation overhead when the group size is large. It can be well controlled even in the case of large-scale application scenarios.

An Empirical Study of the Senior Corporate Managers＇ Ability to Innovate

Senior corporate managers＇ innovation ability and spirit are very important in the growth process of corporate business development. This paper focuses on the innovation capacities of the senior corporate managers of listed companies in China and the complex relationship between firm performance and the operating environment to study and analyze the management and development of Chinese enterprises. Through relevant theoretical analysis and development of research hypotheses using the A-shares in Shanghai and Shenzhen listed companies announced in 2007 and 2008, the authors design an empirical model. The study found that in Chinese listed companies, the higher the innovation spirit of senior corporate managers, the better their business performances; the stronger the dynamic and complexity of the operating environment, the more the corporate managers＇ innovation ability will be developed.

Analysis of performance-based pay model of university financial officers

University financial remuneration model based on the performance is a salary mode of comprehensive ability and contribution which is a potential requirement for labor character of financial stuff. The article according to game analysis of performance salary find that implement and adjust staff＇ s performance salary through performance appraisal has effective incentive functions. Implementing performance salary need to determine appropriate proportion, scientific evaluation indicators and impeccable performance appraisal management approach.

Informatization of Human Resource Management and Analysis of Risk Control

With coming of the global economy era, developed countries have to abandon traditional manufacturing to lower labor costs developing countries due to rising labor costs. Chinese manufacturing industry which is called ＂world factory＂ is facing upgrading technology updates, which promotes high- skilled talents upward trend in the demand for talent in an increasingly competitive speed. To adapt to this environment, corporate human resources has taken a proactive human resources strategy in the ＂ election ＂, ＂ education＂ , ＂use＂ , and ＂stay＂ , select qualified personnel, develop and motivate key employees. But the human resource management is properly and effectively crucial. In this context, we study human resource management and evaluate it： how to measure human resource management and promote the strategic objectives of the enterprise of human resource management services has important practical significance.

Triple plating of tibia in a complex bicondylar tibial plateau fracture

High-energy tibial plateau fracture poses a significant challenge and difficulty for orthopaedic surgeons. Fracture of tibial plateau involves major weight bearing joint and may alter knee kinematics. Anatomic reconstruction of the proximal tibial articular surfaces, restoration of the limb axis （limb alignment） and stable fixation permitting early joint motion are the goals of the treatment. In cases of complex bicondylar tibial plateau fractures, isolated lateral plating is frequently associated with varus malalignment and better results have been obtained with bilateral plating through dual incisions. However sometimes a complex type of bicondylar tibialplateau fractures is encountered in which medial plateau has a biplaner fracture in posterior coronal plane as well as sagittal plane. In such fractures it is imperative to fix the medial plateau with buttressing in both planes. One such fracture pattern of the proximal tibia managed by triple plating through dual posteromedial and anterolateral incisions is discussed in this case report with emphasis on mechanisms of this type of injury, surgical approach and management.

Upper limb compartment syndrome after an adder bite： a case report

Compartment syndrome after an adder bite is extremely rare, whose effects are only secondary to the cytotoxic and hemorrhagic effects of venom. Here we reported a case of compartment syndrome in the upper limb following an adder bite in the thenar eminence. Elevated compartment pressure was documented and immediate surgical fasciotomy was practiced. The patient achieved complete recovery with a good functional result. We discussed the controversies on fasciotomy and non-invasive measures in such a situation, and recommended intracompartmental pressure monitoring during the management of compartment syndrome following adder bites.

A reliable and energy-efficient storage system with erasure coding cache

In modern energy-saving replication storage systems, a primary group of disks is always powered up to serve incoming requests while other disks are often spun down to save energy during slack periods. However, since new writes cannot be immediately synchronized into all disks, system reliability is degraded. In this paper, we develop a high-reliability and energy-efficient replication storage system, named RERAID, based on RAID10. RERAID employs part of the free space in the primary disk group and uses erasure coding to construct a code cache at the front end to absorb new writes. Since code cache supports failure recovery of two or more disks by using erasure coding, RERAID guarantees a reliability comparable with that of the RAID10 storage system. In addition, we develop an algorithm, called erasure coding write （ECW）, to buffer many small random writes into a few large writes, which are then written to the code cache in a parallel fashion sequentially to improve the write performance. Experimental results show that RERAID significantly improves write performance and saves more energy than existing solutions.